JP3021566U - Push switch - Google Patents

Abstract

(57) [Abstract] [Purpose] The assembly is automated by arranging the pair of fixed contact pieces symmetrically with respect to the insulating cylinder and increasing the winding diameter of the return spring. Securing the durable mounting strength of the fixed contact piece for a long time. [Structure] Insulation cylinder with locking step 1a formed on the upper part of the inner surface
1 and a pair of fixed contact pieces 3 and 4 in which the opposed contact surfaces 3a and 4a are exposed and inserted into the vertical insertion holes 2 and 2 formed to face the cylindrical body 1, respectively, and these fixed contact pieces 3 and 4. , 4 are provided with substantially U-shaped movable contact pieces 5 that elastically contact with the contacting surfaces 3a, 4a of the contact portions 5a, 5a, respectively, and the winding diameter on the spring receiving projection 1b of the insulating cylinder 1 is relatively large. And a self-projecting pressing body 8 having a locking bullet piece 7 which is inserted into the cylindrical body 1 against the spring 6 and is to be engaged with the locking step portion 1a. Both ends 5c, 5c of the movable contact piece 5 through the contact portions 5a, 5a of the movable contact piece 5 are elastically contacted with the inner edge of the window hole 8c of the pressing body 8 for assembly.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a drip-proof self-resetting push switch that is suitable for use as a door switch of an automobile or a flashing light switch of a trunk room and can be fully automatically assembled.

[0002]

[Prior art]

 As a push switch of this type, there has been a push switch described in, for example, Japanese Utility Model Laid-Open No. 4-55611. In this conventional technique, an insulative bottomed cylindrical body having a locking step portion formed on the inner surface thereof, a pair of fixed contact pieces arranged so as to partially face the inner wall of the bottomed cylindrical body, and each of these fixed A movable contact piece having a substantially inverted U-shape that slidably contacts the contact piece and is inserted into the cylindrical body with a spring interposed between the movable piece and the bottom portion of the bottomed cylindrical body to be engaged with the locking step portion. And a self-projecting pressing body having a bullet stop piece, each end of which passes through a contact portion of the movable contact piece inserted through the center boss of the pressing body inside the window of the pressing body. It is a push switch that is assembled by making elastic contact with the edge.

[0003]

[Problems to be solved by the device]

 In the above-mentioned conventional technique, the pair of fixed contact pieces are asymmetric and difficult to assemble, and in particular, the L-shaped fixed contact piece for body earth cannot be automatically press-fitted into the bottomed cylinder or the coil spring can not be automatically inserted. However, there has been a problem that since the press-fitting strength of the L-shaped fixed contact piece is weakened with the lapse of time, malfunctions often occur due to poor contact.

In order to eliminate the above-mentioned problems, the present invention arranges the pair of fixed contact pieces symmetrically with respect to the insulating cylindrical body, and increases the winding diameter of the return spring. The purpose of this is to automate the assembly by and secure the durable mounting strength of the fixed contact piece for a long time.

[0005]

[Means for Solving the Problems]

 The above-mentioned object of the present invention is to form a pair of fixing members in which an insulating cylindrical body having a locking step portion formed on the upper portion of the inner surface thereof and a vertical insertion hole formed opposite to the cylindrical body are exposed and fixed to each other by exposing opposing contact surfaces. A contact piece and a movable contact piece having a substantially inverted U shape that elastically contacts the contact surface of each of the fixed contact pieces at the contact portions are provided, and the winding diameters on the spring receiving protrusions of the insulating cylinder are comparative. The movable contact provided on the pressing body, each of which comprises a self-projecting pressing body having a locking bullet piece that is inserted into the cylindrical body against a large spring and should be engaged with the locking step portion. This can be achieved by elastically assembling both ends of the piece passing through the contact portion to the inner edge of the window hole of the pressing body.

[0006]

[Operation] The pair of fixed contact pieces can be made of simple metal strips, and each contact piece can be locked from the lower part of the left and right insertion holes of the insulating cylinder to, for example, its locking claws on the cylindrical step edge. It has a drip-proof effect because it was easily inserted and fixed by the locking means. Further, the spring has a large winding diameter to prevent the spring from being deformed or displaced due to the inner wall of the cylinder, and the upper and lower sides of the spring do not have to be supported by bosses or the like.

Further, by assembling both ends of the movable contact piece provided in the pressing body through the contact portion to the inner edge of the window hole of the pressing body for assembly, the movable contact piece does not largely protrude from the pressing body to the outside. Therefore, it can be easily inserted into the cylinder body and the assembly can be automated.

The pressing body is always located at the protruding position where the pressing body is elastically contacted with the insulating cylindrical body by the spring-back force of the spring and the locking stepped portion of the cylindrical body, and the pair of fixed contact pieces face each other. A movable contact piece is used to conduct and short-circuit between the contact surfaces, and the interior lamp can be turned on, for example, when the door is open.

If the pressing body is pushed into the cylinder body against the elastic force of the spring by closing the door, etc., the contact part of the movable contact piece separates from the facing contact surface and rides on the inner wall surface of the insulating cylinder body to make a contact. The interior light etc. can be turned off by disconnecting the connection between the fixed contact pieces.

[0011]

【Example】

 Examples will be described with reference to the drawings. First, as shown in FIGS. 1 and 4, the basic structure of the present invention is a vertical insertion which is formed opposite to an insulating cylindrical body 1 made of plastic or the like, in which an engaging step portion 1a is formed in an upper portion of an inner surface and a protruding portion 1b is formed in a lower portion. Insert a pair of fixed contact pieces 3 and 4 having contact surfaces 3a and 4a into the holes 2 and 2, and use the elastic force of the locking claws 3b and 4b on the cylindrical step edge 1c as shown in FIG. Lock.

Further, as shown in FIG. 2, the contact surfaces 3a and 4a of the fixed contact pieces 3 and 4 are slidably contacted with each other and have contact portions 5a and 5a for short-circuiting the contact surfaces 3a and 4a. The movable contact piece 5 made in step 4 is temporarily fixed in the pressing body 8 by the locking pieces 5b as shown in FIGS. 3 and 4, and the pressing body 8 projects from four corners of the inner wall of the cylindrical body 1, for example. As shown in FIGS. 2 and 4, the spring 6 is inserted between the spring receiving protrusion 1b and the spring receiving protrusion 1b, and the spring 6 is inserted into the cylindrical body 1 as shown in FIG. As shown in FIG. 4, the portion 1a is forcibly inserted from the upper portion of the cylinder 1 against the elastic force of the locking bullet piece 7 to be engaged.

If the spring receiving projection 1b is a spring receiving elastic piece 1e having a wedge shape as shown in FIG. 8, the spring 6 can be inserted from either the upper or lower direction of the cylinder.

In this invention, as the pressing body 8, for example, a covered rectangular cylinder as shown in FIGS. 1 and 5 is used, and the upper projecting portion of the movable contact piece 5 is inserted into the upper center hole 8a of the cylindrical body of FIG. As described above, the both ends 5c, 5c passing through the contact portions 5a, 5a of the movable contact piece 5 which is temporarily fixed by engaging the locking pieces 5b, 5b with the pressing body step edge 8b are connected to the window of the pressing body 8. Assembled by elastically contacting the inner edge of the hole 8c as shown in FIG. 3, the upper part of the insulating cylinder 1 is press-fitted against the elastic force of the locking bullets 7 and 7 as described above.

A reference numeral 9 in each drawing is a waterproof cover made of rubber or the like, and when attached to the hole of the door panel P of the car with the cylindrical piece 1d as shown in FIG. The reference numeral 10 is a lead wire crimp-connected to the lower part of the fixed contact pieces 3 and 4, but the lead wire may be joined by using a well-known tab terminal connector or the like instead of the crimp connection.

Further, reference numeral 7a in FIG. 1 is a cut groove for facilitating the locking bullet piece 7 to swing, and the shape and number of the spring receiving projection 1b and the spring receiving bullet piece 1e of the cylindrical body are springs. The number of protrusions may be any number as long as they are 6-shaped.

Further, the pair of fixed contact pieces 3 and 4 are formed in a symmetrical band shape, and the respective contact pieces can be easily inserted and fixed from the lower part into the left and right insertion holes 2 and 2 of the insulating cylinder 1.

Further, even if the winding diameter of the spring 6 is increased to the vicinity of the inner wall facing the opposite side of the cylindrical body 1, the inner wall of the cylindrical body does not cause short-circuiting between the contact pieces 3 and 4 and causes the spring 6 to be deformed and displaced. This can be prevented, and the upper and lower sides of the spring 6 do not have to be supported by bosses or the like, and automatic insertion into the cylinder 1 can be easily performed.

When the spring receiving piece 1e is adopted as shown in FIG. 8, the spring 6 can be inserted and mounted from the lower part of the cylindrical body 1 against the elastic force of the piece 1e and through the inclined surface 1f thereof.

The movable contact piece 5 provided in the pressing body 8 is elastically contacted with the inner edges of the window hole 8c of the pressing body 8 by assembling the movable contact piece 5a through the contact portions 5a, 5a. Since 5 does not largely protrude from the pressing body 8 to the outside, it can be easily and automatically inserted into the cylindrical body 1.

Since the present invention has the above-described structure, the pressing body 8 is always pressed against the insulating cylinder 1 by the spring-back force of the spring 6 and the locking bullet piece 7 is locked by the locking step portion 1a of the cylinder. At the projecting position elastically contacted with, the movable contact piece 5 conducts a short circuit between the facing contact surfaces 3a, 4a of the fixed contact pieces 3, 4 forming a pair, and, for example, the interior light can be turned on when the door is open. it can.

When the pressing body 8 is pushed into the cylindrical body 1 against the elastic force of the spring 6 by closing the door, the contact portion 5a of the movable contact piece 5 is removed from the contact surfaces 3a and 4a forming the pair. Since it comes into contact with the inner wall surface of the cylinder 1 at a distance, it is possible to turn off the interior light by cutting off the conduction between the pair of fixed contact pieces 3 and 4.

When the pressing body 8 moves up and down in the insulating cylinder 1 in this manner, the pressing body 8 is guided by the inner wall surface of the insulating cylinder 1 and smoothly moves up and down without tilting. The amount of protrusion of the spring 6 by the spring 6 can be limited by elastically engaging the locking bullet pieces 7, 7 with the cylindrical locking step portion 1a.

[0024]

[Effect of device]

 Since the present invention is configured as described above, it has the following effects. Since the pair of fixed contact pieces 3 and 4 can simply insert and fix a simple band into the insertion hole 2 and 2 of the insulating cylinder 1 from the lower part thereof, automatic insertion and assembly can be realized, and each contact piece 3 and 4 can be realized. Since No. 4 can be press-punched from the same punching die, it has the first effect that the die die cost is halved and parts management is easier than that of the left and right variants.

Particularly, in the present invention, most of the fixed contact pieces 3 and 4 forming a pair are concealed and housed in the cylindrical body insertion holes 2 and 2, so that they are excellent in drip-proof effect and can be protected from disturbance. There is also a second effect.

Further, since the spring 6 has a large winding diameter so as to reach the vicinity of the inner wall of the cylinder, these inner walls do not short-circuit between the fixed contact pieces 3 and 4 and the spring 6 can be deformed and deformed. It is possible to prevent displacement, and it is not necessary to support the top and bottom of the spring 6 with bosses or the like, and there is a third effect that the spring 6 itself can be automatically inserted into the tubular body 1.

Further, the movable contact piece 5 provided inside the pressing body 8 is elastically contacted with the inner edges of the window hole 8c of the pressing body 8 through the contact portions 5a, 5a to assemble the movable contact piece 5a. Since the piece 5 does not largely protrude from the pressing body 8 to the outside, it has the fourth effect that it can be easily inserted into the cylinder 1 and can be automatically inserted and assembled.

Also, in the push switch of the present invention, the self-projecting pressing body 8 by the spring 6 is engaged and locked by the locking bullet 7 on the locking step portion 1a formed on the inner surface of the insulating cylindrical body 1. The amount of protrusion is limited to prevent it from being pulled out, and it has a fifth effect that it can be inserted and mounted in the snap and the cylinder with one touch, and the assembly work can be automated easily.

According to the second aspect, when the spring 6 is inserted and mounted in the cylindrical body, the spring 6 can also be inserted and mounted from the lower part of the cylindrical body 1 against the elastic force of the spring receiving elastic piece 1e, so that the insertion directionality is eliminated. Therefore, it is possible to add the effect that the degree of freedom in setting automatic assembly is improved.

In summary, in the self-returning push switch according to the present invention, the constituent elements such as the pair of left and right fixed contact pieces 3 and 4, the coil spring 6, the pressing body 8 and the movable contact piece 5 mounted therein are described above. Since it is easy to manufacture a drip-proof self-resetting push switch by simply and coaxially inserting it in the insulating cylinder 1 that is the push switch casing in order, it is possible to perform fully automatic assembly. There is an effect.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of a notch of a main part showing an example of a push switch according to the present invention.

FIG. 2 is an enlarged cross-sectional view of the assembly of FIG.

FIG. 3 is an enlarged cross-sectional view showing a coupling example of a pressing body and a movable contact piece.

FIG. 4 is a vertical sectional side view of the central portion of the one shown in FIG.

5 is an enlarged cross-sectional view taken along the broken line in FIG.

FIG. 6 is a sectional view showing a state different from that of FIG.

FIG. 7 is a sectional view showing a state different from that of FIG.

FIG. 8 is a perspective view of a main part showing an example of a spring receiving bullet of an insulating cylindrical body.

[Explanation of symbols]

 1 Insulation cylinder 1a Locking step 1b Spring receiving projection 1e Spring receiving bullet 1f Bullet slope 2 Insert hole 3,4 Fixed contact piece 3a, 4a Opposing contact surface 5 Moving contact 5a Contact 5c Moving contact Both ends of one piece 6 Spring 7 Locking piece 8 Pressing body 8c Window hole

Claims (2)

[Scope of utility model registration request] 1. An insulating cylindrical body 1 having a locking step portion 1a formed on an upper portion of an inner surface thereof, and vertical insertion holes 2,2 formed so as to oppose the cylindrical body 1 to be inserted so that opposing contact surfaces 3a, 4a are exposed. A fixed pair of fixed contact pieces 3 and 4 and a substantially inverted U-shaped movable contact piece 5 that elastically contacts the facing contact surfaces 3a and 4a of these fixed contact pieces 3 and 4 at contact portions 5a and 5a, respectively. A locking bullet piece 7 which is inserted into the cylindrical body 1 against the spring 6 having a relatively large winding diameter on the spring receiving projection 1b of the insulating cylindrical body 1 and which should be engaged with the locking step portion 1a is provided. And a movable contact piece provided on the pressing body 8.
Both ends 5c, 5c passing through the contact portions 5a, 5a of 5 are pressed by the pressing body.
Push switch assembled by elastically contacting the inner edge of 8 window holes 8c. 2. The push switch according to claim 1, wherein the spring receiving projection 1b of the insulating cylinder 1 is a spring receiving bullet.