JPH10323590A - Pump dispenser - Google Patents

Abstract

PROBLEM TO BE SOLVED: To contrive stabilizing discharge action by freely relatively movably providing a piston on a connecting shaft part fitted with two stoppers for regulating the relative movement range of the piston and using a slide valve mechanism in which when the piston is abutted on the stopper part a discharge path opening is closed in a discharge valve mechanism. SOLUTION: When pushing in an ejector head 5 against a spring 6 by hand, a discharge mechanism 8 is opened to discharge liquid in a pump body 2 sucked by opening a suction valve mechanism 7 in advance. At this time, since immediately after the head 5 is pushed in, a piston 3 is held by friction force between an outer cylindrical part 32 of the piston 3 and a cylindrical part 21 of the pump body 2, only a connecting shaft part 4 is moved downward and a first stopper part 41 leaves the lower end of an inner cylindrical part 31 of the piston 3 to open a discharge path opening 18a. And when by the following pushing-in a second stopper part 42 is engaged with the upper end of the piston, the piston 3 is pushed in, and the liquid in the pump body 2 is pressurized and discharged through a discharge nozzle 51.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pump dispenser which discharges a predetermined amount of an inner solution with a single touch by pushing an ejector head having a discharge nozzle attached to an opening of a container such as a shampoo or a rinse. The present invention relates to a device having a suck-back function of delaying a suction timing of a content liquid after discharge is completed for a predetermined time and sucking remaining liquid in a discharge passage into a pump body.

[0002]

2. Description of the Related Art Conventional pump dispensers of this kind are:
A pump body attached to the container opening, and reciprocally inserted into the pump body to expand the internal volume of the pump body;
A piston for contracting, a spring for urging the piston in a direction to expand the internal volume of the pump body, and a discharge nozzle arranged outside the pump body and connected to the piston in the pump body via a connection shaft. An ejector head, a suction valve mechanism provided in a suction passage leading from the inside of the container into the pump body, and a discharge valve mechanism provided in a discharge passage leading from the inside of the container to the discharge nozzle.

After the end of the discharge, while the stem moves in the direction of expanding the volume of the pump body by a predetermined amount by the spring biasing force of the spring, the suction valve mechanism is closed and the discharge valve mechanism is kept open to maintain the state in the discharge passage. The opening and closing timings of the suction valve mechanism and the discharge valve mechanism are adjusted so that the remaining liquid is sucked back into the pump body (suck back).

[0004]

However, in the case of the above-mentioned prior art, since a ball valve whose valve element comes into contact with and separates from a valve seat is generally employed as a discharge valve mechanism, the discharge valve mechanism is not used after discharge is completed. The time until the valve element is seated on the valve seat is affected by the viscosity of the liquid, and the lower the viscosity, the more the suction amount tends to decrease.

An object of the present invention is to provide a pump dispenser capable of stabilizing a suck-back amount.

[0006]

In order to achieve the above object, according to the present invention, as one means for solving the problems, a slide valve mechanism, which is hardly affected by the viscosity of the liquid, is used for the discharge valve mechanism. The opening and closing timing of the valve mechanism is stabilized.

As another solution, the suction valve mechanism is constituted by a valve member in which a holding spring portion and a valve body are integrally formed to stabilize the opening / closing timing of the suction valve mechanism at the time of suckback, thereby reducing the number of parts. A reduced and cheaper pump dispenser is provided.

According to the first aspect of the present invention, there is provided a pump body attached to a container opening, a piston reciprocally inserted into the pump body to expand and contract the internal volume of the pump body, and a pump body of the pump body. An ejector head having a discharge nozzle disposed outside and connected to a piston in the pump body via a connection shaft, a spring for urging the connection shaft in a direction protruding from the pump body, and A suction valve mechanism provided in a suction passage communicating with the inside of the pump body and having a pressing spring portion for pressing a valve body against a valve seat with a predetermined force; and a discharge valve provided in a discharge passage communicating from the inside of the container to a discharge nozzle. A pump dispenser having a mechanism, wherein the piston is attached to the connection shaft so as to be relatively movable in the axial direction, and the relative movement range of the piston is attached to the connection shaft. The first and second stoppers are provided at the distal end of the connecting shaft with respect to the second stopper, and the discharge valve mechanism is connected to the first stopper of the piston. And a slide valve mechanism that closes the discharge passage opening at the contact position and opens the valve when separated from the first stopper.

In the present invention, in the free state, the connecting shaft portion is urged in the protruding direction by the spring force of the spring, and the piston is pressed against the first stopper to maintain the discharge passage opening in the valve closed state. Have been. Further, since the suction valve mechanism is held in the closed state by the valve closing urging means, seal leakage due to an increase in internal pressure at the time of overturn or at a high temperature is prevented.

In the distribution process, by interposing a clip between the ejector head and the container cap, the ejector head can be locked and the suction valve mechanism can be fixed in the closed state.

When ejecting, the ejector head is pushed in against the spring force of the spring. At this time, the piston is stopped by the frictional force with the pump body, and only the connecting shaft moves in the pushing direction. Due to the movement of the connecting shaft portion, the first stopper portion separates from the lower end of the piston,
The discharge passage opening opens. Then, the second stopper portion of the connecting shaft portion engages with the upper end of the piston, and the piston is pushed together with the connecting shaft portion, and the liquid stored in the pump body is pressurized to discharge the discharge passage and the discharge passage. Liquid is discharged through the nozzle.

When the ejector head is completely pushed,
Due to the spring force of the spring, the connecting shaft starts to return in a direction to protrude from the pump body. At the beginning of the return, the piston has stopped due to frictional resistance with the inner periphery of the pump body, and only the connecting shaft moves. When the connecting shaft moves by a predetermined amount, the first stopper abuts on the lower end of the piston, and the discharge passage opening is closed.

The suction valve mechanism is closed by the spring force of the pressing spring from the beginning of the return to the time when the discharge passage opening is closed, and the liquid remaining in the discharge passage is sucked back into the pump body. .

After the first stopper of the connecting shaft comes into contact with the piston, the piston moves together with the connecting shaft by the spring force of the spring, the discharge passage opening of the discharge valve mechanism is closed, and the suction valve mechanism is closed. When the pump is open, the volume inside the pump body is expanded, so the negative pressure inside the pump body increases and the valve body of the suction valve mechanism is separated from the valve seat against the spring force of the presser spring and opened. Then, the liquid in the container is sucked into the pump body.

The invention according to a second aspect is characterized in that the suction valve mechanism is fixed to an inner periphery of the pump body,
A valve body portion that can be freely moved toward and away from the valve seat, and a pressing spring portion that integrally connects the fixed portion and the valve body portion and presses the valve body portion against the valve seat with a predetermined spring force. It is characterized by comprising the integrally formed valve member provided.

By using such a suction valve mechanism, it is possible to realize a self-closing type suction valve mechanism that keeps the valve closed at all times with only one valve member, so that the number of parts can be reduced and the assembly is very easy. It is.

Further, in the invention according to claim 3, the suction valve mechanism is provided with a fixed shaft portion fixed to a bottom wall of the pump body, and a flexible member extending radially outward from the fixed shaft portion. A sealing film portion provided on the periphery of the sealing film portion, and an annular sealing protrusion which closes the suction passage opening located around the fixed shaft portion in close contact with the bottom wall of the pump body by the elastic force of the sealing film portion; Characterized by being constituted by an integrally molded valve member provided with:

Also in this case, it is possible to realize a self-closing suction valve mechanism that keeps the valve closed at all times with only one valve member, so that the number of parts can be reduced and the assembly is very easy.

Further, as set forth in claim 4, the suction valve mechanism is provided with a valve body which comes into contact with and separates from a valve seat at the suction passage opening of the pump body, and the valve body is provided on the valve seat. Alternatively, a structure may be provided that includes the valve body that presses against a predetermined spring force and a separate pressing spring.

In this case, although the effect of integrally forming the presser spring and the valve body cannot be obtained, the discharge valve mechanism is basically a slide valve mechanism, regardless of the viscosity of the liquid. Opening / closing timing can be stabilized.

According to a fifth aspect of the present invention, there is provided a pump body mounted on a container opening, a piston reciprocally inserted into the pump body to expand and contract the internal volume of the pump body, An ejector head including a spring for biasing a piston in a direction to expand the internal volume of the pump body, a discharge nozzle disposed outside the pump body and connected to a piston in the pump body via a stem, In a pump dispenser comprising: a suction valve mechanism provided in a suction passage leading from the inside of the container into the pump body; and a discharge valve mechanism provided in a discharge passage leading from the inside of the container to a discharge nozzle. A first and a second, which are attached to the connecting shaft so as to be relatively movable in the axial direction, and regulate the relative movement range of the piston on the connecting shaft.
A stopper portion is provided and the first stopper portion is positioned on the distal end side of the connecting shaft portion with respect to the second stopper portion, and the discharge valve mechanism is moved at a position where the piston comes into contact with the first stopper portion. A sliding valve mechanism that closes the opening and opens when separated from the first stopper portion, while the suction valve mechanism includes a valve body that comes into contact with and separates from a valve seat; And a pressing member that keeps the valve body of the suction valve mechanism pressed against the valve seat while moving the connecting shaft portion from the push-off position in the projecting direction by a predetermined amount.

In this case, from the time when the ejector head is completely pushed, the connecting shaft portion starts to return in the direction protruding from the pump body due to the spring force of the spring, and the first stopper portion contacts the lower end of the piston to open the discharge passage opening. The valve body of the suction valve mechanism is forcibly pressed by the pressing member provided on the connecting shaft portion in a predetermined section until the blockage, and the residual liquid in the discharge passage is reliably returned.

According to a sixth aspect of the present invention, there is provided a pump body mounted on a container opening, a piston reciprocally inserted into the pump body to expand and contract the internal volume of the pump body. An ejector head having a discharge nozzle arranged outside the pump body and connected to a piston in the pump body via a connection shaft, and a spring for urging the connection shaft in a direction to protrude from the pump body;
A suction valve mechanism provided in a suction passage leading from the inside of the container into the pump body and having a pressing spring portion for pressing a valve body against a valve seat with a predetermined force; and a discharge passage leading from the inside of the container to a discharge nozzle. A pump valve dispenser provided with a valve body that comes into contact with and separates from a valve seat. The pump dispenser further comprises: a mounting portion fixed to an inner periphery of the pump body; and a suction passage opening. A valve body portion that comes into contact with and separates from a valve seat having a portion, and a pressing spring portion that connects the mounting portion and the valve body portion and presses the valve body portion against the valve seat with a predetermined spring force. It is characterized by comprising the integrally formed valve member provided.

In this case, in the free state, the connecting shaft portion is urged in the projecting direction by the spring force of the spring.
The discharge valve mechanism is closed by the valve body being seated on the valve seat by its own weight, and the suction valve mechanism is held in the closed state by the spring force of the presser spring.

When discharging, the ejector head is pushed in against the spring force of the spring. At this time, the piston is pushed together with the connecting shaft part, the liquid stored in the pump body is pressurized, the valve body of the discharge valve mechanism is pushed up and opened, and the liquid is discharged through the discharge passage and the discharge nozzle. Is done.

When the ejector head is completely pushed,
The spring force of the spring causes the connecting shaft and the piston to start returning in the direction in which they protrude from the pump body. At this time,
The valve body of the discharge valve mechanism is not yet seated on the valve seat, and the discharge passage opening is open in a floating state. On the other hand, the suction valve mechanism is pressed by the valve seat by the spring force of the presser spring portion and is maintained in the valve closed state, so that the pump body becomes negative pressure and residual liquid in the discharge nozzle and the discharge passage is sucked into the pump body. Will be returned.

In the suction valve mechanism, the holding spring portion is formed integrally with the valve body portion, so that there is little variation in the valve closing load and a stable suction return function can be obtained. In addition, since the valve body, the holding spring, and the fixed portion are formed by integrally formed valve members, the number of parts can be reduced and the assembly is very easy.

When the valve body of the discharge valve mechanism is seated on the valve seat and closed after a predetermined time, the valve body of the suction valve mechanism is separated from the valve seat against the spring force of the presser spring and opened. Then, the liquid in the container is sucked into the pump body.

According to a seventh aspect of the present invention, as the suction valve mechanism, a fixed shaft portion fixed to a bottom wall of the pump body and a flexible member extending radially outward from the fixed shaft portion. A sealing film portion provided on the periphery of the sealing film portion, and an annular sealing protrusion which closes the suction passage opening located around the fixed shaft portion in close contact with the bottom wall of the pump body by the elastic force of the sealing film portion; Characterized by being constituted by an integrally molded valve member provided with:

Also in this case, it is possible to realize a self-closing suction valve mechanism that keeps the valve always closed by using only one valve member, so that the number of parts can be reduced and the assembly is very easy.

The invention according to claim 8 provides a pump body mounted on the container opening, a piston inserted into the pump body so as to be reciprocally movable to expand and contract the internal volume of the pump body, An ejector head having a discharge nozzle arranged outside the pump body and connected to a piston in the pump body via a connection shaft, a spring for urging the connection shaft in a direction to protrude from the pump body, A suction valve mechanism provided in a suction passage leading from the inside of the container into the pump body and having a pressing spring portion for pressing the valve body against a valve seat with a predetermined force, and a discharge passage leading from the inside of the container to a discharge nozzle. A discharge valve mechanism provided with a valve element which comes into contact with and separates from the valve seat.The suction valve mechanism comes into contact with and separates from a valve seat having a suction passage opening. A presser member for keeping the valve body of the suction valve mechanism pressed against the valve seat while moving the connection shaft portion in the projecting direction by a predetermined amount from the push-off position. It is characterized by having.

In this case, from the point when the ejector head is completely pushed to the point when the connecting shaft portion starts returning from the pump body by the spring force of the spring until the valve body of the discharge valve mechanism is seated on the valve seat. The valve body of the suction valve mechanism is forcibly pressed by the pressing member provided on the connecting shaft portion, and the residual liquid in the discharge passage is reliably returned.

The ninth aspect of the present invention is characterized in that the spring is provided between the pump body and the ejector head.

In this way, the content liquid does not touch the spring, so that corrosion of the spring can be prevented.

[0035]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to nine illustrated embodiments.

In the first to fifth embodiments of the nine embodiments, the discharge valve mechanism is a slide valve mechanism, and in the sixth to ninth embodiments, the discharge valve mechanism is a ball valve. It is a form.

[First Embodiment] FIG. 1 shows a first embodiment of the present invention.
1 shows a pump dispenser according to an embodiment of the present invention.

In the drawing, reference numeral 1 denotes an entire pump dispenser, which generally has a pump body 2 having a hollow inside which is attached to an opening of a container 10 and a pump body 2 which is reciprocally inserted into the pump body 2. A piston 3 for expanding and contracting the internal volume, an ejector head 5 having a discharge nozzle 51 disposed outside the pump body 2 and connected to the piston 3 in the pump body 2 via a connection shaft 4, and a connection shaft A spring 6 for urging the portion 4 in a direction protruding from the pump body 2, a suction valve mechanism 7 provided in a suction passage 17 communicating from the inside of the container 10 into the pump body 2, and a discharge passage communicating from the inside of the container 10 to a discharge nozzle 51 And a discharge valve mechanism 8 provided to the control valve 18.

The pump body 2 is a cylindrical member having a flange and a bottom, and includes a cylindrical portion 21, a flange portion 22 extending radially outward at an upper end of the cylindrical portion 21, and a bottom wall portion 23 at the lower end of the cylindrical portion 21. , A connecting cylinder portion 24 extending downward from the lower surface of the bottom wall portion 23. This pump body 2 is
Is inserted into the inside of the container 10 from the mouth and neck 11 located at the upper end opening, and the flange 22 is engaged with the upper end of the mouth and neck 11. A suction passage opening 17a communicating with the connection cylinder is formed in the bottom wall 23, and the upper end of a pipe 25 for sucking a liquid is inserted into the inner periphery of the connection cylinder 24. Cylindrical part 21
An air hole 26 communicating between the inside of the container 10 and the inside of the pump body 2 is provided in the vicinity of the upper end.

A container cap 9 is attached to the upper end opening of the pump body 2. Container cap 9
Is a cylindrical screw tube portion 91 provided with a female screw to be screwed to a male screw provided on the outer peripheral surface of the mouth and neck portion 11, and a mouth and neck portion 1
1, a cylindrical plug portion 92 fitted on the inner peripheral surface, a cylindrical shaft guide portion 93 slidably in contact with the outer periphery of the connecting shaft portion 4, a screw cylinder portion 91 and upper ends of the plug portion 92. Top wall portion 9 for connecting flanges and pressing flange 22 at the upper end of pump body 2
4, an annular bottom wall portion 95 connecting the plug body portion 92 and the lower end of the shaft guide portion 93, and a cylindrical piston upper limit stopper 96 projecting downward from the lower surface of the annular bottom wall portion 95. I have.

The piston 3 is a double-cylindrical member provided with an inner cylindrical portion 31 and an outer cylindrical portion 32.
The outer cylinder 32 is slidably fitted on the inner periphery of the cylindrical portion 21 of the pump body 2. The frictional force between the outer cylinder part 32 and the inner periphery of the cylindrical part 21 of the pump body 2 is set to be larger than the frictional force between the inner cylinder part 31 and the connection shaft part 4.

The connecting shaft portion 4 is engaged with the upper and lower ends of the inner cylindrical portion 31 of the piston 3 to regulate the relative movement range.
The second stopper portions 41 and 42 are provided apart from each other in the axial direction. The first stopper portion 41 is the second stopper portion 42
Is located on the distal end side of the connecting shaft portion 4 with respect to.

The connecting shaft portion 4 is composed of a hollow cylindrical piston shaft 43 and a stem 44 inserted into and fixed to the lower end opening of the piston shaft 43.
The stem 44 includes an insertion cylinder portion 45 that is inserted and fixed to the piston shaft 43, a guide portion 46 having a discharge passage opening 18 a that projects downward from the lower end of the piston shaft 43 and opens laterally, and a lower end of the guide portion 46. And a disc-shaped stopper plate portion 47 provided at the bottom.

The first stopper portion 41 for regulating the moving range of the piston 3 is constituted by the outer peripheral edge of the stopper plate portion 47 of the stem 44, and the second stopper portion 42 is formed to protrude annularly on the outer peripheral surface of the piston shaft 43. Have been.

At the lower end surface of the ejector head 5, a cylindrical insertion neck 52 to which the upper end of the piston shaft 43 of the connection shaft 4 is connected is projected downward, and a spring 6 is provided outside the insertion neck 52. A cylindrical cover tube portion 53 that covers the outer periphery is protruded. This cover cylinder 53
The outer peripheral surface is slidably fitted to the inner peripheral surface of the plug body 92 of the container cap 9. The cover tube portion 53 is always provided with the plug portion 92 over the entire stroke of the ejector head 5.
, So that the spring 6 is not exposed to the outside.

The spring 6 is, for example, a metal coil spring, and the ejector head 5 and the container cap 9
The lower end thereof is engaged with a piston annular bottom wall portion 95 between the plug body portion 92 and the shaft guide portion 93 of the container cap 9, and the upper end thereof is inserted into the insertion neck portion 52 of the ejector head 5. And the lower surface of the ejector head 5 between the cover cylinder 53 and the cover cylinder 53. Since the spring 6 is arranged outside the pump body 2 as described above, the liquid content does not touch the spring 6. Therefore, even if the spring 6 is a metal spring, its corrosion can be prevented.

The suction valve mechanism 7 includes a ring portion 71 fitted and fixed to a fitting portion 26 provided on the inner periphery of the cylindrical portion 21;
A valve body 73 which can be freely moved toward and away from the valve seat 72;
The valve member 70 is formed by integrally molding a plurality of radially extending pressing spring portions 74 connecting the valve member 73 and the valve body portion 73.

The ring portion 71 has a rectangular cross-sectional ring shape, and its outer periphery is closely fitted to the inner periphery of the fitting portion 26, and a projection 27 for preventing the ring portion 71 from coming off is provided at the upper end of the fitting portion 26. Have been. Further, the contact surface of the valve body portion 73 with the valve seat 72 is formed in a hemispherical shape. On the other hand, the presser spring portion 74 functions as a leaf spring, and is bent and deformed by a predetermined amount in a state where the valve body portion 73 is seated on the valve seat 72, and the valve body portion 73 is elastically restored by the presser spring portion 74. It is pressed against the valve seat 72.

The discharge valve mechanism 8 closes the discharge passage opening 18a at a position where the piston 3 comes into contact with the first stopper 41, and opens when the piston 3 is separated from the first stopper 41. It has become.

Next, the operation state of the first embodiment is shown in FIG.
This will be described with reference to FIG.

FIG. 2A shows a natural state.

In this natural state, the ejector head 5 is pushed upward by the spring force of the spring 6, and the lower end of the inner cylindrical portion 31 of the piston 3 comes into contact with the first stopper portion 41 at the lower end of the stem 44 so that the discharge passage opening 18a Is closed, and the upper end of the outer cylindrical portion 32 of the piston 3 contacts the lower end of the piston upper limit stopper 96 and stops.

As described above, in the natural state, the discharge passage opening 18a of the discharge valve mechanism 8 is forcibly maintained in the closed state by the spring force of the spring 6.

In the course of distribution, between the ejector head 5 and the container cap 9, for example, as shown in FIG.
The ejector head 5 can be locked by interposing the clip 12 as shown in (g), and the suction valve mechanism 7 can be fixed in the closed state.

In this state, the ejection valve mechanism 8 is opened by pushing the ejector head 5 by hand against the spring force of the spring 6, and the ejection is started.

Immediately after the ejector head 5 is pushed in,
The piston 3 is held by the frictional force between the outer cylindrical portion 32 and the inner periphery of the cylindrical portion 21 of the pump body 2, and only the connecting shaft portion 4 with which the inner cylindrical portion 31 slidably moves moves downward, and the first stopper The portion 41 is separated from the lower end of the inner cylindrical portion 31 of the piston 3 to open the discharge passage opening 18a.

When the connecting shaft 4 is pushed in a predetermined amount, the second stopper 42 of the connecting shaft 4 engages with the upper end of the piston 3, and the piston 3 is pushed together with the connecting shaft 4 and stored in the pump body 2. The liquid is pressurized, and the liquid is discharged through the discharge passage 18 and the discharge nozzle 51.

FIG. 2B shows a state where the ejector head 5 is pushed off.

The push-off position is determined when the lower end of the skirt portion 54 of the ejector head 5 contacts the upper surface of the annular top wall portion 94 of the container cap 9. This state is a point in time when the discharge is completed, in which the discharge valve mechanism 8 is open and the suction valve mechanism 7 is closed. When the hand that pushes the ejector head 5 from this position is released, the ejector head 5 is pushed back by the spring force of the spring 6, and suckback (suckback) is started.

FIG. 2C shows a state in which the ejector head 5 starts to return.

At the beginning of the return, the piston 3 is
2 and the inner peripheral surface of the cylindrical portion 21 of the pump body 2 are stopped by frictional resistance, and only the connecting shaft portion 4 moves upward.

When the connecting shaft portion 4 moves by a predetermined amount (L), the first stopper portion 41 comes into contact with the lower end of the piston 3, and as shown in FIG. Closed.

The suction valve mechanism 7 is maintained in a closed state by the spring force of the presser spring 74 from the start of the return to the time when the discharge passage opening 18a is closed.
The liquid remaining in the pump body is sucked back into the pump body 2. The suction amount is the product (L × S) of the discharge passage cross-sectional area S and the stroke L from the position where the piston 3 abuts the second stopper portion 42 to the time the piston 3 abuts the first stopper portion 41.

After the first stopper 41 of the connecting shaft 4 comes into contact with the piston 3, the piston 3 moves together with the connecting shaft 4 by the spring force of the spring 6 as shown in FIG. Then, the negative pressure in the pump body 2 increases, and the valve body 73 of the suction valve mechanism 7 is separated from the valve seat 72 and opened.
On the other hand, since the discharge valve mechanism 8 is kept closed,
The liquid inside is sucked into the pump body 2. The inside of the container 10 is depressurized by an amount corresponding to the suction of the liquid, but the depressurized state is eliminated because outside air is introduced through the air holes 26 provided in the pump body 2.

Then, as shown in FIG.
Stops when the upper end of the outer cylindrical portion 32 abuts against the piston upper limit stopper 96, and the volume of the pump body 2 is not further expanded, so that the valve body 73 of the suction valve mechanism 7 abuts on the valve seat 72 to close the valve. Is done.

In the present embodiment, the suction valve mechanism 7 is
A ring portion 71 fixed to the inner periphery of the pump body 2, a valve body portion 73 that can be freely moved toward and away from a valve seat 72, and a ring portion 71.
And the valve body 73 are integrally connected to each other to connect the valve body 73 to the valve seat 72.
Spring 74 that presses against a predetermined spring force
, The self-closing suction valve mechanism 7 that always keeps the valve closed by only one valve member 70 can be realized.
The number of parts can be reduced and it is very easy to incorporate.

Next, another embodiment of the present invention (second to fifth embodiments)
Embodiment) will be described.

In the description of each embodiment, only differences from the first embodiment will be mainly described, and the same components as those of the first embodiment will be denoted by the same reference numerals. Description is omitted. Therefore,
The components denoted by the same reference numerals as those in the first embodiment are:
It has exactly the same configuration and operation as the first embodiment, and the description of the first embodiment is cited.

[Second Embodiment] FIGS. 3 and 4 show a second embodiment of the present invention.

In the present embodiment, the bottom wall 2 of the pump body 2 is
Only the reference numeral 23 and the suction valve mechanism 207 are different from those of the first embodiment, and the other configurations are completely the same as those of the first embodiment.

That is, the bottom wall 223 of the pump body 2
As shown in FIG. 3A, a disk-shaped flat portion 2231
And an inverted truncated cone-shaped inclined surface portion 22 inclined so as to gradually open upward from the periphery of the flat portion 2231 toward the cylindrical portion 21.
32. At the center of the flat portion 2231, a fixing protrusion 2233 is protrudingly provided.
A plurality of suction passage openings 17a are formed around the periphery.

On the other hand, the suction valve mechanism 207 is shown in FIGS.
As shown in detail in (d), the fixing projection 2 of the bottom wall portion 223 is formed.
233, a flexible seal film portion 2072 extending radially outward from the fixed shaft portion 2071, and an elasticity of the seal film portion 2072 provided on the periphery of the seal film portion 2072. Bottom wall 223 by force
Of the suction passage opening 17a.
And a ring member 2070 which is integrally formed and has a ring-shaped seal projection 2073 for closing the ring.

The fixed shaft portion 2071 is provided with a fixing projection 2 on the bottom surface.
233 is provided with a fitting hole 2071a for fitting, and on the upper surface, a knob portion 2071c protruding upward is provided. The seal film portion 2072 is formed in an umbrella shape that gradually inclines radially outward from the peripheral edge of the upper surface of the fixed shaft portion 2071, and the annular annular seal protrusion 2073 is formed in a circular shape having a circular cross section that bulges downward. Is constituted by a thick portion.

Also in this case, one valve member 2070
Self-closing suction valve mechanism 20 that keeps the valve closed at all times
7 can be realized, the number of parts can be reduced, and integration is very easy. Also, the sealing film portion 20
Since the seal projection 2073 and the annular seal projection 2073 are integrally formed, the contact surface pressure of the seal projection 2073 is stable, and the number of parts is small, which is advantageous for assembly. In particular, knob 2
Since 071b is provided, the knob portion 2071b can be picked up and assembled, so that the assembling becomes extremely simple.

FIG. 4 shows an operation state of the second embodiment.

Also in this case, in the natural state, the discharge valve mechanism 8 presses the first stopper portion 41 at the lower end of the piston 3 by the spring force of the spring 6 as in the first embodiment, and the discharge valve mechanism 8 discharges. The passage opening 18 a is closed by the piston 3. Then, the suction valve mechanism 207 is connected to the seal membrane 2.
With the elastic restoring force of 072, the seal projection 2073 is brought into close contact with the inclined surface portion 2232 of the bottom wall portion 223, and the suction passage opening 17a is closed (see FIG. 4A).

When ejecting, the ejector head 5 is pushed in against the spring force of the spring 6. At this time, the piston 3 is pushed into the connection shaft 4 integrally, and the liquid stored in the pump body 2 is pressurized, the valve body of the discharge valve mechanism 8 is pushed up and opened, and the discharge passage 18 and the discharge passage 18 are discharged. The liquid is discharged through the nozzle 51.

When the ejector head 5 is completely pushed out (see FIG. 4B), the connecting shaft portion 4 starts to return by the spring force of the spring 6 (see FIG. 4C), and the stopped piston 3 moves to the second position. Move away from the stopper portion 42. On the other hand, the seal film portion 2072 of the suction valve mechanism 207 is maintained in a closed state, and the pump body 2 becomes a negative pressure, and the residual liquid in the discharge nozzle 51 and the discharge passage 18 is sucked back into the pump body 2.

The suction valve mechanism 207 is a valve member 2070 in which the seal film portion 2072 and the seal projection 2073 are integrated.
, The dispersion of the valve opening load is small, and a stable suction-back function can be obtained. Since it is constituted by one valve member 2070, the number of parts can be reduced and the assembly is very easy.

When the connecting shaft portion 4 moves by a predetermined amount L, the first stopper portion 41 contacts the lower end of the piston 3 and the discharge valve mechanism 8 is closed (see FIG. 4D).

Next, when the first stopper 41 engages with the lower end of the piston 3 and the piston 3 starts to move upward together with the connecting shaft 4 (see FIG. 4E), the negative pressure in the pump body 2 is reduced. Becomes large, and the seal film portion 207 of the suction valve mechanism 207
2 is bent upward, the seal projection 2073 is separated from the bottom wall 223 and opened, and the liquid inside the container 10 is sucked into the pump body 2. When returning to the natural state, the seal projection 2073 is again seated on the bottom wall portion 223 by the elastic restoring force of the seal film portion 2072, and the suction valve mechanism 207 is closed (see FIG. 4F).

[Third Embodiment] FIGS. 5 and 6 show a third embodiment of the present invention.

In the third embodiment, the shape of the bottom wall 323 of the pump body 2 and the configuration of the suction valve mechanism 307, and the pressing member 3078 for pressing the valve body 3072 of the suction valve mechanism 307 on the connecting shaft 4 are described. This is different from the first embodiment in that the first embodiment is provided.

That is, in the case of the third embodiment, the bottom wall portion 323 of the pump main body 2 is formed into a disc-shaped flat portion 32.
The flat portion 3231 includes a valve seat 3071 protruding in a cylindrical shape.

On the other hand, the suction valve mechanism 307 has a valve seat 3071
And a plurality of leg portions 3073 protruding downward from the valve body portion 3072. The leg portion 3073 is movably inserted into the suction passage opening 17a, and a retaining projection 3075 that engages with an annular step portion 3074 provided on the inner periphery of the discharge passage 18 is provided at the lower end of the leg portion 3073. Is provided. Retaining projection 307
Reference numeral 5 indicates that the valve body 3072 is engaged at a position separated from the valve seat 3071 by a predetermined distance.

The valve body 3072 is provided with a cylindrical spring receiving portion 3076 extending upward.
The outer peripheral surface of the spring 76 is provided with a spring receiving slope 3077 that is inclined inward at a predetermined angle upward.

On the other hand, at the lower end of the stem 44 of the connecting shaft 4,
While moving upward by a predetermined amount from the pushed-off position of the connecting shaft 44, the valve body 3072 of the suction valve mechanism 307 is moved to the valve seat 3071.
A pressing spring 3078 is provided as a pressing member for holding the pressing member 30 in a pressed state. The presser spring 3078 has a cantilevered leaf spring structure in which the upper end is fixed to the lower end surface of the stem 44, and is configured to be pressed against the spring receiving slope 3077 of the spring receiving portion 3076 from the side at the push-off position of the connection shaft 4. Have been. Spring receiving slope 3077 and presser spring 3078
The contact surface has a frictional surface as small as possible.

FIG. 6 shows an operation state of the third embodiment.

In the natural state, the discharge valve mechanism 8 is held in a closed state by the spring force of the spring 6 which pushes up the ejector head 5. On the other hand, the suction valve mechanism 307
Is seated on the valve seat 3071 by the weight of the valve body 3072 (see FIG. 6A). Therefore, the valve body 3072 of the suction valve mechanism 307 at the time of overturn or thermal expansion
Although there is a possibility that the discharge valve mechanism 8 is separated from the valve seat 3071, the discharge valve mechanism 8 is held in a closed state by the spring force of the spring 6, and liquid leakage is prevented.

Then, before the ejector head 5 is pushed out in the discharge stroke, the pressing spring 3078 provided at the lower end of the stem 44 of the connecting shaft 4 engages with the spring receiving slope 3077 of the valve body 3072 of the suction valve mechanism 307. , Is gradually pushed out along the slope of the spring receiving slope 3077,
The valve body 3072 is forcibly pressed against the valve seat 3071 to maintain the valve closed state.

Since the spring receiving slope 3077 is inclined so as to open downward, the spring force of the presser spring 3078 acts downward on the valve body 3072 to reliably press the valve body 3072. be able to.

After the ejector head 5 is completely pushed, the connecting shaft 4 starts to return upward by the spring force of the spring 6, as shown in FIGS. 6 (b) to 6 (d). At this time, the discharge passage opening 18a is still open, and the valve body of the suction valve mechanism 307 is operated by the pressing spring 3078 until the first stopper 41 contacts the lower end of the piston 3 and closes the discharge passage opening 18a. The portion 3072 is forcibly pressed, and the residual liquid in the discharge passage 18 is reliably returned. During this time,
The pressing spring 3078 is provided on the slope 30 of the valve body 3072.
The valve body 307 moves upward while sliding with respect to 77.
2 does not lift.

The holding spring 3078 has a spring receiving slope 3077.
Away from the valve body 3072, the force for holding down the valve body 3072 is lost, and the valve body 3072 is separated from the valve seat 3071 and the liquid is sucked through the suction passage 17 (see FIG. 6 (e)). The negative pressure in the pump body 2 disappears, and the valve body 3072 is seated on the valve seat 3071 by its own weight (see FIG. 6F). At the time of liquid suction, the valve body 30
The retaining projection 3075 of the leg 3073 of the 72
074 to prevent the valve body 3072 from coming off.

[Fourth Embodiment] FIGS. 7 and 8 show a fourth embodiment of the present invention.

The fourth embodiment differs from the first embodiment in the shape of the bottom wall 423 of the pump body 2 and the configuration of the suction valve mechanism 407.

That is, in the case of the fourth embodiment, the bottom wall portion 423 of the pump main body 2 is formed by the disc-shaped flat portion 42.
The flat portion 4231 is provided with a valve seat 4071 projecting in a cylindrical shape.

On the other hand, the suction valve mechanism 407 has a valve seat 4071
And a plurality of leg portions 4073 projecting downward from the valve body portion 4072. The leg portion 4073 is movably inserted into the suction passage opening 17 a, and a lower end portion of the leg portion 4073 has a spring receiving portion axially opposed to an annular stepped portion 4074 provided on the inner periphery of the suction passage 17. 4075, and the spring receiving portion 40
A coil-shaped pressing spring 4076 is mounted in a contracted state between the stepped portion 75 and the step portion 4074.
The valve body 4072 is pressed against the valve seat 4071 by the spring force of 76 to maintain the valve closed state.

FIG. 8 shows an operation state of the fourth embodiment.

Also in this case, in the natural state, the discharge valve mechanism 8
As in the first embodiment, the first stopper 41 is pressed against the lower end of the piston 3 by the spring force of the spring 6, and the discharge passage opening 18 a of the discharge valve mechanism 8 is closed by the piston 3. Then, the suction valve mechanism 407 causes the valve body 4072 to move the valve seat 4
071, and the suction passage opening 17a is closed (see FIG. 8A).

Then, when the ejector head 5 is pushed in to discharge the liquid and the ejector head 5 is completely pushed out (see FIG. 8B), the connecting shaft 4 projects from the pump body 2 by the spring force of the spring 6. Until the first stopper portion 41 contacts the lower end of the piston 3 and closes the discharge passage opening 18a (see FIGS. 8C and 8D), the suction valve is operated by the spring force of the holding spring 4076. The valve body 4072 of the mechanism 407 is maintained in the closed state, and the residual liquid in the discharge passage 18 is reliably returned.

When the first stopper 41 abuts on the lower end of the piston 3 and the discharge passage opening 18a closes and the piston 3 starts to move upward, the negative pressure in the pump body 4076 increases rapidly, and the suction pressure increases. Valve body part 40 of valve mechanism 407
71 is the valve seat 4 against the spring force of the holding spring 4076.
071, the suction passage 17 is opened, the liquid is sucked into the pump body 2 (see FIG. 8 (e)), the state returns to the natural state, and the valve body 4072 is seated on the valve seat 4071 (FIG. f)).

[Fifth Embodiment] FIGS. 9 and 10 show a fifth embodiment of the present invention.

In the fifth embodiment, the bottom wall portion 523 of the pump body 2, the inner peripheral shape of the discharge passage 18, the suction valve mechanism 5
07 is different from that of the first embodiment.

That is, in the case of the fifth embodiment, the bottom wall portion 523 of the pump body 2 is formed by the disc-shaped flat portion 52.
The flat portion 5231 includes a valve seat 5071 protruding in a cylindrical shape.

On the other hand, the suction valve mechanism 507 has a valve seat 5071
And a plurality of elastic legs 5073 projecting downward from the valve body 5072 are integrally formed by a valve member 5070.

The elastic leg portion 5073 is provided at the suction passage opening 17a.
Is movably inserted into The elastic leg portion 5073 has an open leg structure that gradually opens toward the lower end, and the lower end portion has an annular valve seat 5071 or the connecting tubular portion 5.
The protrusion 5 pressed against a tapered surface 171 that opens downward and is formed in the middle of the suction passage 17 provided in the inside 24.
074 is provided. The protrusion 5074 is pressed against the tapered surface 171, and the reaction force of the pressing force is inclined downwardly with respect to the horizontal direction so that the elastic leg portion 50 is actuated.
73 is pulled downward, and the valve body 5072 is
Is pressed against.

An annular step 172 having a reduced diameter is formed at the upper end of the tapered surface 171.
The projection 72 at the lower end of the elastic leg portion 5073 is engaged with 72 to prevent the elastic leg portion 5073 from coming off.

FIG. 10 shows an operation state of the fifth embodiment.

Also in this case, in the natural state, the discharge valve mechanism 8
As in the first embodiment, the first stopper 41 is pressed against the lower end of the piston 3 by the spring force of the spring 6, and the discharge passage opening 18 a of the discharge valve mechanism 8 is closed by the piston 3. Then, the suction valve mechanism 507 has the tapered surface 1
By the spring force of the elastic leg 5073 pressed against the base 71,
The valve body 5072 is in close contact with the valve seat 5071, and the suction passage opening 17a is closed (see FIG. 10A).

The liquid is ejected by pushing the ejector head 5, and from the time when the ejector head 5 is completely pushed (FIG. 1)
0 (b)), until the connecting shaft portion 4 starts returning from the pump body 2 by the spring force of the spring 6 and the first stopper portion 41 contacts the lower end of the piston 3 to close the discharge passage opening 18a. During this time (see FIGS. 10C and 10D), the suction valve mechanism 5
07 is maintained in the valve closed state, and the residual liquid in the discharge passage 18 is reliably returned.

When the first stopper portion 41 abuts on the lower end of the piston 3 and the discharge passage opening 18a closes and the piston 3 starts to move upward, the negative pressure in the pump body 2 sharply increases, and the suction valve mechanism is increased. The valve body 5072 of 507 rises from the valve seat 5071 against the spring force of the elastic leg 5073, the suction passage 17 is opened, and the liquid is sucked into the pump body 2 (see FIG. 8 (e)). Return to the state and the valve body 5
072 is seated on the valve seat 5233 (see FIG. 8 (f)).

In this embodiment, the suction valve mechanism 507 is integrally formed by a valve member 5070 in which the valve body 5072 and the elastic leg 5073 are integrated, so that there is little variation in the valve opening load and stable suction return. Function can be obtained. Further, since the suction valve mechanism 507 is constituted by one valve member 5070, the number of parts can be reduced and the incorporation is extremely easy.

Next, embodiments (sixth to ninth embodiments) in which the discharge valve mechanism is a ball valve will be described.

In each of the sixth to ninth embodiments, the discharge valve mechanism is common, and other than the discharge valve mechanism, it is the same as the first, second, third, and fifth embodiments. In order to avoid redundant description, only parts different from the above embodiment will be described, and the same parts will be denoted by the same reference numerals and description thereof will be omitted. The configurations and functions of the portions denoted by the same reference numerals are the same as those in the above embodiment, and the description in the above embodiment is cited.

[Sixth Embodiment] FIG. 11 shows a sixth embodiment of the present invention.

The overall structure is the same as that of the first embodiment. The connecting shaft 604, the piston 603, the discharge valve mechanism 6
08 differs from the first embodiment.

In this embodiment, the piston 603 is integrally fixed to the lower end of the connecting shaft 604. The connection shaft 604 has a hollow pipe shape in which the discharge passage 18 is formed, and a discharge passage opening 18a is opened downward at the lower end, and a piston 603 is integrally formed on the outer periphery of the lower end.

The discharge valve mechanism 608 is provided in the discharge shaft 18 of the connecting shaft 604.

That is, a valve seat 6081 is provided in the middle of the discharge passage 18 so as to partition the discharge passage 18, and a valve body 6082 made of a ball is provided above the valve seat 6081 on the downstream side in the discharge direction. Are provided so as to be able to freely contact with and separate from. In the free state, the valve element 6082 is
, And the valve body 6082 is separated from the valve seat 6081 by a pressure in the pump body 2 so as to float and open. Also,
At the upper end of the ejector head 5, there is provided a valve body retainer 6083 that regulates the amount of lift of the valve body 6082 facing the internal opening of the nozzle part 51.

FIG. 12 shows an operation state of the sixth embodiment.

In the natural state, as shown in FIG. 12A, the connecting shaft 604 is urged in the projecting direction by the spring force of the spring 6, and the discharge valve mechanism 608 is
82 is seated on the valve seat 6081 by its own weight and is closed,
The suction valve mechanism 7 is held in a closed state by the spring force of the holding spring 74.

When ejecting, the ejector head 5 is pushed in against the spring force of the spring 6. At this time, the piston 3 is pushed into the connection shaft portion 604 integrally, the liquid stored in the pump body 2 is pressurized, the valve element 6082 of the discharge valve mechanism 608 is pushed up and opened, and the discharge passage 18 and The liquid is discharged through the discharge nozzle 51.

When the ejector head 5 is completely pushed out (see FIG. 12B), the connecting shaft 604 and the piston 3 begin to return in the direction in which the connecting shaft 604 and the piston 3 protrude from the pump body 2 by the spring force of the spring 6 (FIG. 12C). reference). At this time,
The valve body 6082 of the discharge valve mechanism 608 is not yet seated on the valve seat 6081, and the discharge passage opening 18a is open in a floating state. On the other hand, the suction valve mechanism 7 is pressed by the valve seat 72 by the spring force of the pressing spring portion 74 and is maintained in the valve closed state.
The pump body 2 becomes a negative pressure, and the residual liquid in the discharge nozzle 51 and the discharge passage 18 is sucked back into the pump body 2.

In this embodiment, although the discharge valve mechanism 608 changes the falling speed at the time of suck back due to the viscosity of the liquid, the suction valve mechanism 7 has the holding spring 74 formed integrally with the valve body 73. The opening and closing timing of the suction valve mechanism 7 is stable, and a stable suction return function can be obtained.

After a lapse of a predetermined time, the discharge valve mechanism 60
When the valve body 6082 of FIG. 8 is seated on the valve seat 6081 and closed (see FIG. 12D), the valve body 73 of the suction valve mechanism 7 is disengaged from the valve seat 72 against the spring force of the presser spring 74. The container is opened apart, the liquid in the container 10 is sucked into the pump body 2 (see FIG. 12 (e)), the state returns to the natural state, and the suction valve mechanism 7 closes again (see FIG. 12 (f)).

[Seventh Embodiment] FIG. 13 shows a seventh embodiment of the present invention.

In this embodiment, an umbrella-shaped valve member 20 is used.
The overall configuration including the integrally formed suction valve mechanism 207 provided with the valve 70 is the same as that of the second embodiment, and the configuration of the discharge valve mechanism 608 composed of the integrally formed connecting shaft 604, the piston 603, and the ball valve. Are the same as in the sixth embodiment.

FIG. 14 shows an operation state of the seventh embodiment.

That is, in the natural state, the connecting shaft portion 604 is urged in the protruding direction by the spring force of the spring 6, and the discharge valve mechanism 608 causes the valve body 6082 to have the valve seat 60
The valve is seated at 81 and closed, and the suction valve mechanism 207 is held in a closed state by the elastic force of the seal film portion 2072 (see FIG. 14A).

When ejecting, the ejector head 5 is pushed in against the spring force of the spring 6. At this time, the piston 603 is pushed into the connection shaft 604 integrally, the liquid stored in the pump body 2 is pressurized, and the valve element 6082 of the discharge valve mechanism 608 is pushed up and opened,
The liquid is discharged through the discharge passage 18 and the discharge nozzle 51.

When the ejector head 5 is completely pushed (see FIG. 14B), the connecting shaft 604 and the piston 603 start to return in the direction in which the connecting shaft 604 and the piston 603 protrude from the pump body 2 by the spring force of the spring 6 (FIG. 14C). reference). At this time, the valve element 6082 of the discharge valve mechanism 608 is still in the valve seat 608.
1, the discharge passage opening 18a is open in a floating state. On the other hand, in the suction valve mechanism 207, the seal protrusion 2073 is moved by the elastic restoring force of the seal film 2072 so that the bottom wall 223 is formed.
The valve body is maintained in a closed state by being pressed against the inclined surface portion 2232 of the pump nozzle 2, and the pump body 2 becomes a negative pressure, and the residual liquid in the discharge nozzle 51 and the discharge passage 18 is sucked back into the pump body 2.

In this embodiment, too, the discharge valve mechanism 60
Although the falling speed at the time of suck back of the valve element 6082 of No. 8 changes depending on the viscosity of the liquid, the suction valve mechanism 207 is formed integrally with the seal film portion 2072 and the annular seal projection 2073. The opening / closing timing is stable, and stable suck-back performance can be obtained.

After a lapse of a predetermined time, the discharge valve mechanism 60
When the valve body 6082 of No. 8 is seated on the valve seat 6081 and closed (see FIG. 14D), the seal protrusion 207 of the suction valve mechanism 7 is formed.
3 is opened apart from the inclined surface portion 2232 of the bottom wall against the elastic restoring force of the sealing film portion 2072, and the liquid inside the container 10 is sucked into the pump body 2 (see FIG. 14 (e)). Upon completion and return to the natural state, the suction valve mechanism 7 closes again (see FIG. 14 (f)).

[Eighth Embodiment] FIG. 15 shows an eighth embodiment of the present invention.

In this embodiment, the shape of the bottom wall portion 823 of the pump body 2, the structure of the suction valve mechanism 307, and the connecting shaft 604 are provided with a pressing spring 3078 for pressing the valve body 3072 of the suction valve mechanism 307. The third embodiment is the same as the third embodiment in that the connecting shaft 604 and the piston 6 are integrally formed.
03. The configuration of the discharge valve mechanism 608 composed of a ball valve is the same as that of the sixth embodiment.

That is, in this embodiment, the connecting shaft 6
A plurality of holding springs 3078 for holding the valve body 3072 are provided at the lower end opening of the valve body 04.

FIG. 16 shows an operation state of the eighth embodiment.

That is, in the natural state, the connecting shaft portion 604 is urged in the protruding direction by the spring force of the spring 6, and the discharge valve mechanism 608 causes the valve body 6082 to move the valve seat 602 by its own weight.
81, the valve is closed, and the suction valve mechanism 307 is
The valve seat 3071 is seated by its own weight of 072 and held in a closed state (see FIG. 16A).

In the case of discharging, the ejector head 5 is pushed in against the spring force of the spring 6. At this time, the piston 603 is pushed into the connection shaft 604 integrally, the liquid stored in the pump body 2 is pressurized, and the valve element 6082 of the discharge valve mechanism 608 is pushed up and opened,
The liquid is discharged through the discharge passage 18 and the discharge nozzle 51.

When the ejector head 5 is completely pushed (FIG. 16B), the connecting shaft 604 and the piston 603 begin to return in the direction in which the connecting shaft 604 and the piston 603 protrude from the pump body 2 by the spring force of the spring 9 (FIG. 16C). . At this time, the valve body 6082 of the discharge valve mechanism 608 is not yet seated on the valve seat 6081, and the discharge passage opening 18a is open in a floating state.

Then, until the valve element 6082 sits on the valve seat 6081 and closes the discharge passage opening 18a (FIG. 1).
6 (d)), the suction valve mechanism 308 by the presser spring 3078.
Of the discharge passage 18 is forcibly pressed.
The remaining liquid in the inside is surely returned. During this time, the holding spring 3078
Moves upward while sliding on the spring receiving slope 3077 of the valve body 3072, and the valve body 3072 does not lift.

When the presser spring 3078 is separated from the spring receiving slope 3077, the force for pressing the valve body 3072 is lost, and the valve body 3072 is separated from the valve seat 3071 to suck the liquid through the suction passage 17 (FIG. 16). (See FIG. 6E)), when returning to the natural state, the valve body 3072 is seated on the valve seat 3071 by its own weight (see FIG. 6F).

[Ninth Embodiment] FIGS. 17 and 18 show a ninth embodiment of the present invention.

As shown in FIG. 17, the ninth embodiment has the same overall configuration as the fifth embodiment, including a suction valve mechanism 507 having an elastic leg 5073 and a valve body 5072. A ball valve type discharge valve mechanism 608 is the same as that of the sixth embodiment.

FIG. 18 shows an operation state of the fifth embodiment.

Also in this case, in the natural state, the discharge valve mechanism 60
The valve body 6082 of No. 8 is seated on the valve seat 6081 by its own weight and is maintained in a closed state, and the suction valve mechanism 507 is also maintained in a closed state by the spring force of the elastic leg 5073 (FIG. 18A). reference).

In this state, the ejector head 5 is pushed to discharge the liquid, and when the ejector head 5 is completely pushed out (see FIG. 18B), the connecting shaft 604 and the piston 603 are moved by the spring force of the spring 9 to the pump body 2. 18 (see FIG. 18 (c)). At this time, the valve body 6082 of the discharge valve mechanism 608 does not immediately sit on the valve seat 6081, and the discharge passage opening 18a is open in a floating state.

Then, until the valve element 6082 sits on the valve seat 6081 and closes the discharge passage opening 18a (FIG. 1).
8 (d)), the suction valve mechanism 507 includes an elastic leg 5073.
The valve body 5072 of the suction valve mechanism 507 is maintained in a closed state by the spring force of, and the residual liquid in the discharge passage 18 is reliably returned.

Then, when the discharge valve mechanism 608 is closed, the valve body 5072 of the suction valve mechanism 507 is opened apart from the valve seat 5071 against the spring force of the elastic leg 5073, and the liquid inside the container 10 is pumped. Inhaled into the main body 2 (FIG. 18)
(See (e)), the state returns to the natural state, and the suction valve mechanism 507 closes again (see FIG. 12 (f)).

In the sixth to ninth embodiments, the case where the spring is disposed outside the pump main body 2 has been described. However, the spring is disposed between the piston inside the pump main body 2 and the bottom wall of the pump main body. May be attached.

[0151]

As described above, according to the first to fifth aspects of the present invention, a slide valve mechanism that opens and closes by a relative movement between a piston and a connecting shaft is employed as a discharge valve mechanism. Accordingly, the influence of the viscosity of the liquid at the time of suckback is reduced, the opening / closing timing of the discharge valve mechanism can be stabilized, and the suckback amount can be stabilized regardless of the viscosity of the liquid.

In particular, the suction valve mechanism is constituted by a valve member in which the holding spring portion and the valve body are integrally formed, so that the suction valve mechanism can be opened and closed at the time of suckback. Timing can be stabilized, and the amount of suck-back can be further stabilized.

Further, it is possible to realize a self-closing suction valve mechanism that keeps the valve always closed by using only one valve member, and it is possible to reduce the number of parts and to assemble it very easily.

Further, as in the invention according to claim 4,
When adopting a configuration in which the valve body of the suction valve mechanism is forcibly pressed to the closed state by the holding member at the time of suckback, even if the suction valve mechanism is not a self-closing type, the suction valve mechanism can be reliably Can be kept closed,
The amount of suck-back can be stabilized.

On the other hand, even in the case of an opening / closing valve mechanism in which a valve body comes into contact with or separates from a valve seat, such as a ball valve, the opening / closing timing of the discharge valve mechanism is affected by the viscosity of the liquid. If the suction valve mechanism is constituted by a valve member in which the holding spring portion and the valve body are integrally formed, the opening and closing timing of the suction valve mechanism at the time of suckback can be stabilized. Thus, the effect of stabilizing the suck-back amount can be obtained. In addition, a self-closing suction valve mechanism that keeps the valve always closed with only one valve member can be realized, and the number of parts can be reduced and the assembly is very easy.

Further, even when the discharge valve mechanism is an open / close valve mechanism whose opening / closing timing is affected by the viscosity of the liquid, such as a ball valve, the valve body of the suction valve mechanism at the time of suckback. By forcibly holding the suction valve mechanism in the closed state by the holding member, the suction valve mechanism can be securely held in the closed state at the time of suckback, and the suckback amount can be stabilized.

Furthermore, if the spring is provided outside the pump main body and between the pump main body and the ejector head as described in claim 9, the content liquid does not touch the spring, so that corrosion of the spring can be prevented.

[Brief description of the drawings]

FIG. 1 (a) is a sectional view of a pump dispenser according to a first embodiment of the present invention, and FIGS. 1 (b) and 1 (c) are those in FIG. 1 (a).
5 (d) is a half sectional front view of a stem, and FIG. 6 (e) is a sectional view taken along line ee of FIG. 5 (d).

FIG. 2 is an operation explanatory view of the pump dispenser of FIG. 1;

FIG. 3 (a) is a sectional view of a pump dispenser according to a second embodiment of the present invention, and FIGS. 3 (b), 3 (c) and 3 (d).
3A is a plan view, a bottom view, and a half-section front view of a valve member of the suction valve mechanism of FIG.

FIG. 4 is an operation explanatory view of the pump dispenser of FIG. 3;

FIG. 5 (a) is a sectional view of a pump dispenser according to a third embodiment of the present invention, and FIGS. 5 (b), (c) and (d).
FIG. 3A is a front sectional view, a plan view, and a bottom view of a valve member of the suction valve mechanism shown in FIG.
FIG. 1F is a bottom view of the stem.

FIG. 6 is an operation explanatory view of the pump dispenser of FIG. 5;

FIG. 7 is a sectional view of a pump dispenser according to a fourth embodiment of the present invention.

FIG. 8 is an operation explanatory view of the pump dispenser of FIG. 7;

FIG. 9 (a) is a sectional view of a pump dispenser according to a fifth embodiment of the present invention, and FIG. 9 (b) is an enlarged sectional view of the suction valve mechanism of FIG. 9 (a).

FIG. 10 is an operation explanatory view of the pump dispenser of FIG. 9;

FIG. 11 is a sectional view of a pump dispenser according to a sixth embodiment of the present invention.

FIG. 12 is an operation explanatory view of the pump dispenser of FIG. 11;

FIG. 13 is a sectional view of a pump dispenser according to a seventh embodiment of the present invention.

FIG. 14 is an operation explanatory view of the pump dispenser of FIG. 13;

FIG. 15 is a sectional view of a pump dispenser according to an eighth embodiment of the present invention.

FIG. 16 is an operation explanatory view of the pump dispenser of FIG. 15;

FIG. 17 is a sectional view of a pump dispenser according to a ninth embodiment of the present invention.

FIG. 18 is an operation explanatory view of the pump dispenser of FIG. 17;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Pump dispenser 2 Pump main body 23 Bottom wall part 25 Pipe 3 Piston 4 Connecting shaft part 41 1st stopper part 42 2nd stopper part 5 Ejector head 51 Discharge nozzle 53 Cover cylinder part 6 Spring 7 Suction valve mechanism 70 Valve member 71 Ring part 72 valve seat 73 valve body part 74 holding spring part 8 discharge valve mechanism 9 container cap 10 container 11 mouth and neck part 17 suction passage 17a suction passage opening 18 discharge passage 18a discharge passage opening 207 suction valve mechanism (second embodiment) 2070 Valve member 2071 Fixed shaft part 2072 Seal film part 2073 Seal protrusion 307 Suction valve mechanism (third embodiment) 3071 Valve seat 3072 Valve body part 3073 Leg part 3074 Step part 3075 Retaining protrusion 3076 Spring receiving part 3077 Spring If you press the receiving slope 3078 407 Suction valve mechanism (fourth embodiment) 4071 Valve seat 4072 Valve body part 4073 Leg part 4074 Step part 4075 Spring receiving part 4076 Holding spring 507 Suction valve mechanism (Fifth embodiment) 5070 Valve member 5071 Valve Body 5072 Elastic leg 171 Tapered surface 172 Stepped portion 608 Discharge valve mechanism (Sixth to ninth embodiments) 6081 Valve seat 6082 Valve body 6083 Valve body presser

Claims (9)

[Claims] 1. A pump body mounted on a container opening, a piston inserted reciprocally into the pump body to expand and contract the internal volume of the pump body, and a pump disposed outside the pump body. An ejector head having a discharge nozzle connected to a piston in the main body via a connection shaft; a spring for urging the connection shaft in a direction protruding from the pump body; and a suction passage from the inside of the container into the pump body. A suction valve mechanism provided in the passage and having a pressing spring portion for pressing the valve body against the valve seat with a predetermined force; and a discharge valve mechanism provided in a discharge passage from the inside of the container to the discharge nozzle. In the pump dispenser, the piston is attached to the connecting shaft so as to be relatively movable in the axial direction, and the first and second connecting shafts regulate the relative movement range of the piston. A second stopper portion is provided, and the first stopper portion is positioned on the distal end side of the connecting shaft portion with respect to the second stopper portion. The discharge valve mechanism is moved at a position where the piston comes into contact with the first stopper portion. A pump dispenser having a slide valve mechanism that closes a discharge passage opening and opens when the discharge passage is separated from a first stopper. 2. A suction valve mechanism comprising: a fixed portion fixed to an inner periphery of the pump main body; a valve body portion which can be freely moved toward and away from a valve seat; and the fixed portion and the valve body portion are integrally connected. The pump dispenser according to claim 1, characterized in that the pump dispenser is constituted by an integrally formed valve member having a pressing spring portion for pressing the valve body portion against a valve seat with a predetermined spring force. 3. A fixed shaft portion fixed to a bottom wall of a pump body, a flexible seal film portion extending radially outward from the fixed shaft portion, and the seal film portion. And an annular seal projection which is provided on the periphery of the seal member and closes the suction passage opening located around the fixed shaft portion in close contact with the bottom wall of the pump body by the elastic force of the seal film portion. The pump dispenser according to claim 1, wherein: 4. A valve body for bringing a suction valve mechanism into and out of contact with a valve seat at a suction passage opening of a pump body, and the valve for pressing the valve body against the valve seat by a predetermined spring force. The pump dispenser according to claim 1, wherein the pump dispenser has a structure including a body portion and a separate pressing spring portion. 5. A pump body mounted on a container opening, a piston reciprocally inserted into the pump body to expand and contract the internal volume of the pump body, and expanding the internal volume of the pump body by using the piston. An ejector head having a discharge nozzle disposed outside the pump body and connected to a piston in the pump body via a stem, and a suction passage from the inside of the container to the inside of the pump body. In a pump dispenser comprising: a suction valve mechanism provided in a passage; and a discharge valve mechanism provided in a discharge passage communicating from the inside of the container to a discharge nozzle, wherein the piston is relatively movable in an axial direction with respect to a connection shaft portion. And a first and a second stopper for restricting a relative movement range of the piston are provided on the connection shaft, and the first stopper is attached to the connection shaft. The discharge valve mechanism is positioned at a distal end side of a connecting shaft portion with respect to the second stopper portion, and the discharge valve mechanism closes a discharge passage opening at a contact position with a first stopper portion of a piston; The suction valve mechanism is provided with a valve body that comes into contact with and separates from a valve seat. A pump dispenser comprising a holding member for keeping a valve body of a suction valve mechanism pressed against a valve seat while moving in a fixed amount projecting direction. 6. A pump body mounted on an opening of a container, a piston reciprocally inserted into the pump body to expand and contract the internal volume of the pump body, and the pump disposed outside the pump body. An ejector head having a discharge nozzle connected to a piston in the main body via a connection shaft; a spring for urging the connection shaft in a direction protruding from the pump body; and a suction communicating from the inside of the container into the pump body. A suction valve mechanism provided in the passage and having a pressing spring portion for pressing the valve body against the valve seat with a predetermined force; and A discharge valve mechanism having a valve element
A pump dispenser comprising: a mounting portion fixed to an inner periphery of the pump body; a valve body portion which comes into contact with and separates from a valve seat having a suction passage opening; and the mounting portion. A pressing spring portion that connects the valve body portion and presses the valve body portion against the valve seat by a predetermined spring force;
A pump dispenser comprising an integrally formed valve member provided with: 7. A pump mounted on a container opening, a piston reciprocally inserted into the pump main body to expand and contract the internal volume of the pump main body, and the pump disposed outside the pump main body. An ejector head having a discharge nozzle connected to a piston in the main body via a connection shaft; a spring for urging the connection shaft in a direction protruding from the pump body; and a suction communicating from the inside of the container into the pump body. A suction valve mechanism provided in the passage and having a pressing spring portion for pressing the valve element against the valve seat with a predetermined force; and A discharge valve mechanism having a valve element
A pump dispenser comprising: a fixed shaft portion fixed to a bottom wall of a pump body; a flexible sealing film portion extending radially outward from the fixed shaft portion; An annular seal projection provided on a peripheral edge of the seal film portion and close to a bottom wall of the pump body by an elastic force of the seal film portion to close a suction passage opening located around the fixed shaft portion; A pump dispenser comprising a member. 8. A pump body mounted on the container opening, a piston reciprocally inserted into the pump body to expand and contract the internal volume of the pump body, and the pump disposed outside the pump body. An ejector head having a discharge nozzle connected to a piston in the main body via a connection shaft; a spring for urging the connection shaft in a direction protruding from the pump body; and a suction communicating from the inside of the container into the pump body. A suction valve mechanism provided in the passage and having a pressing spring portion for pressing the valve element against the valve seat with a predetermined force; and A discharge valve mechanism having a valve element
In the pump dispenser, the suction valve mechanism has a valve body which comes into contact with and separates from a valve seat having a suction passage opening, and the connection shaft is provided at a position where the connection shaft is pushed off. A pump dispenser comprising a holding member for keeping a valve body of a suction valve mechanism pressed against a valve seat while moving in a fixed amount projecting direction. 9. The pump dispenser according to claim 1, wherein the spring is provided between the pump body and the ejector head.