JPS6018351Y2 - self-closing lid - Google Patents

Description

[Detailed description of the invention] The present invention relates to a self-closing lid for tubes and other containers in which the pressure inside the container can be manually changed depending on the amount of pressure applied to the container. Concerning an open type lid.

A known lid of this kind is made bellows-shaped and has two rondel features which are interconnected along their outer parts and whose inner parts cooperate to form a valve. In this valve, a protrusion connected to the first body acts as a closing valve for an opening in the second body that serves as a valve seat, and in this lid, a projection connected to the first body acts as a closing valve for an opening serving as a valve seat. The concave sides of the body face each other.

Although closures of the above type are suitable for discharging fluids of relatively low viscosity, they are unsuitable when the required opening pressure is relatively high.

The main purpose of this invention is to have a gentle opening characteristic, thus
To provide a self-closing lid that can respond to low pressure and maintain the effectiveness of the lid.

Embodiments of the present invention will be described below with reference to the drawings.

The self-closing lid of the invention consists of two parts 1, 12 connected together at their peripheries by snap means, both parts 1, 12 being relatively rigid due to injection molding of plastic material. It is made to have thin walls.

One of the members, that is, the first member 1, can be made into a tube by screwing a screw 3 provided on the central sleeve portion 2 into a tube made of an elastic material or a screw provided at the end of the container. or attached to a container.

A disk-shaped portion 4 extending radially outward is integrally formed on one end side of the center sleeve portion 2. As shown in FIG.

The disk-shaped portion 4 is formed to a thickness that forms a first flexible elastic surface, and as shown in FIG. 1, the peripheral portion is lower than the central portion in the position where the contents are not recompressed That is, it is located so as to extend radially outward and obliquely downward.

The outer end of the disc-shaped portion 4 is connected with an outer 7 flange 5 extending parallel to the content dispensing direction.

- One or more beads 6 extending in the circumferential direction are formed on the outer peripheral surface of the outer flange 5.

That is, the base side of the disc-shaped part 4 is located below the upper end surface of the central sleeve part 2, and therefore the cylindrical extension part 7 is formed above the disc-shaped part 4 of the central sleeve part 2. ing.

The upper end of the cylindrical extension 7 is formed with an engagement portion 8 formed by a radially outwardly extending annular bead or notch.

On the other hand, from the region between the cylindrical extension part 7 of the center sleeve part 2 and the disc-shaped part 4, there is a protrusion 9 forming a part of the discharge port.
extends upward.

The protrusion 9 communicates with the interior of the container via a hole 10 provided in the central sleeve part 2.

Furthermore, an opening 11 is formed in the side wall of the protrusion 9.

On the other hand, the second member 12 also has a central sleeve part 13 like the first member 1, and a conical part 14 is connected to the distal end side of the central sleeve part 13.
An opening 15 is formed at the upper end.

Further, a disk-shaped portion 16 extending radially outward is integrally formed on the base end side of the center sleeve portion 13.

The disc-shaped part 16 is molded to a thickness that forms a second flexible elastic surface similarly to the disc-shaped part 4, and as shown in FIG. 1, a position where the contents are not pressurized. In this case, the peripheral portion is located at a higher position than the central portion, that is, extends radially outward and obliquely upward.

The optimum angle of inclination is between 10 degrees and 15 degrees.

The outer end of the disk-shaped portion 16 is provided with the outer flange 5.
A peripheral rim 17 is formed which engages a bead 6 provided on the rim.

Furthermore, an annular flange 18 that converges downward is provided at the end of the central sleeve portion 13 located below the disk-shaped portion 16.
is provided, the annular flange 18 of which engages with a retaining portion 8 provided on the central sleeve portion 2 of the first member 1, whereby both members 1, 12 are assembled together to form a lid. It turns out.

In the lid, the elastic surfaces of both members 1 and 12 form convex surfaces facing each other in the closed position as shown in FIG. 1, and in the open position as shown in FIG. In this case, the concave surfaces form concave surfaces facing each other.

Further, an annular groove 20 is formed on the outer circumferential surface of the distal end of the projection 144 portion 9 of the first member 1, and the annular groove 20 snaps into the opening 15 provided in the central sleeve portion 13 of the second member 12. It is designed to fit together and maintain the locked position.

The tip of the protrusion 9 has a conical shape, and the angle of the end face 19 with respect to the horizontal plane is larger than the angle of the conical part 14 of the central sleeve part 13, so that when the valve is closed, the opening 15 is An effective seal is obtained between the surrounding conical portion 14 and the projection 9.

For this purpose, the conical portion 14 can be suitably beveled to form a sealing lip.

In the position shown in FIG. 1, the lid is locked.

In this state, the central sleeve portion 13 of the second member 12 is in such a state that the catching means 18 engages with the annular bead (retaining portion) 8 of the first member I. It is pressed in the direction of the first member 1.

Locking of the lid is also achieved by snap-engaging the periphery of the opening 15 into an annular groove 20 provided in the projection 9.

The cylindrical extension part 7 and the engaging part 8 are arranged so that, during transportation, the inner part of the lid formed by the central sleeve part 2, 13 and the protruding part 9 is connected to the conical part 4, the outer flange 5 and the disc-shaped part. 1
6 and thus prevent pressure exerted on the container from acting on the elastic surfaces 4, 16 acting as a diaphragm.

Note that the cylindrical extension part 7, the engaging part 8, and the annular flange 18 are not necessarily made as parts that lock into each other, but simply have annular flanges facing each other, and these flanges are , can also be made so as to overlap each other in the position shown in FIG.

When the lid is in normal use, i.e. when the lid is opened, the central sleeve part 13 is moved away from the first member 1, thereby creating a gap between the conical part 14 and the annular groove 20 and between the protrusion 9 and the annular flange 18. The locking engagement between is released.

In this position (not shown), the disc-shaped part 16 still makes an acute angle with respect to the horizontal plane, that is, the peripheral part of the disc-shaped part 16 is at a higher position than its inward direction, and in this state, the disc-shaped part 16 is in a circular position. The convex surfaces of the elastic surfaces of the plate-shaped portion face each other.

Next, when an attempt is made to push the contents inside the container at 17, the container is slightly deformed under pressure, and the contents of the container are pushed into the gap between the disc-shaped part 4 and the disc-shaped part 16. The resulting pressure causes the inner parts of the disc-shaped parts 4 and 16 to move away from each other, so that the angle of the disc-shaped parts becomes a slightly positive angle. You can change it as you like.

This relative movement causes the central sleeve portion 13 to be moved upwardly relative to the protrusion 9 and opened upward as shown in FIG.
The contents are discharged from here.

By moving the valve means axially after the angle of the resilient disk-shaped wall has reached zero, a very gentle opening movement takes place, and this requires only a very small pressure change. , this lid is suitable for all kinds of container contents.

Then, when the pressure on the container ＼ is stopped, the disc-shaped part 4 and the disc-shaped part 16 automatically return to the initial concave surface due to the elasticity of the disc-shaped part 4 and the disc-shaped part 16, and the opening is closed. 15 will be closed by the protrusion 9.

In this case, the best effect is obtained if both the disc-shaped part 4 and the disc-shaped part 16 have approximately the same flexibility and have shapes that gradually change toward the center.

In addition, as shown in Figure 1, there is a short downward ring-shaped °7 lunge 2.
By extending a sealing flange such as 1 from the disk-shaped portion 16 so that its outer periphery touches the inner periphery of the outer flange 5, it is possible to further strengthen the snap engagement between the main parts in addition to the sealing effect. I can do it.

As described above, according to the present invention, a self-closing lid and self-opening [7] can be obtained by the action of the flexible elastic surface, and the sealing of the lid is reliable, and furthermore, since it is composed of a combination of two members. This has the effect of simplifying the structure and manufacturing at low cost.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view showing the lid locked during transportation, and FIG. 2 is a cross-sectional view of the lid in the ejection position. DESCRIPTION OF SYMBOLS 1...First member, 2...Center sleeve part, 4...Disc shaped part, 5...Outer flange, 6... - Bead, 7...Cylindrical extension, 8...Annular bead, 9...Protrusion, 10...Opening, 12...・Second member, 13... Center sleeve part, 14...
Conical part, 15... Opening, 16... Disc shaped part, 17... Peripheral rim, 18...
Annular flange, 20...grooves.

Claims (1)

[Scope of utility model registration request] It consists of a first member and a second member connected to each other at the periphery, the first member having a disk-shaped first flexible elastic surface and a protrusion extending from the first flexible elastic surface, and the second member having a circular shape. having a plate-shaped second flexible elastic surface and a sleeve portion extending from the second flexible elastic surface, the protruding portion of the first member being positioned so as to extend toward the opening provided in the sleeve portion of the second member; An engagement groove is provided on the circumferential surface of the tip of the protrusion, and the opening edge of the sleeve part can be freely engaged with this engagement groove. In the closed position of the lid, the protrusion closes the opening of the sleeve part, and both flexible elastic surfaces are connected to the lid. In the closed position, the convex surfaces face each other; in the open position, the concave surfaces face each other; A self-closing lid characterized in that when it runs out, it automatically returns to its concave surface and closes the lid.