JPH0684645U - 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 cylindrical body 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 and fixed in the vertical insertion holes 2 and 2 formed to face the cylindrical body 1, and these fixed contact pieces 3 and 4, respectively. , 4 are provided with movable contact pieces 5 of substantially inverted U-shape elastically contacting the contact surfaces 3a, 4a of the insulating cylinders 1 and 4a, respectively, and the bottom portion 1 of the insulating cylinder 1
and a self-projecting pressing body 8 having a locking piece 7 which is inserted into the cylindrical body 1 against the spring 6 having a relatively large winding diameter on b and which should be engaged with the locking step portion 1a. Equipped

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a drip-proof type 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. Self-projecting pressing bodies each having a bullet stop piece, and both ends of the movable contact piece, which are inserted through the center bosses of the pressing bodies, through the contact portions of the movable contact pieces are located inside the window hole 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 spring having a contact piece and a substantially U-shaped movable contact piece that makes elastic contact with the contact surface of each of the fixed contact pieces at the contact portion, and has a relatively large winding diameter on the bottom of the insulating cylinder. This can be achieved by respectively providing a self-projecting pressing body that has a locking bullet piece that is inserted into the cylindrical body to engage with the locking step portion.

[0006]

[Operation] A pair of fixed contact pieces can be made of a simple band, 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, the pressing body is prevented from largely protruding from the pressing body by narrowing the contact portion interval of the movable contact piece provided therein, so that the pressing body can be easily inserted into the cylinder body and the assembly is realized automatically. it can.

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 1. is temporarily fixed in the pressing body 8 with the locking piece 5b as shown in FIGS. 3 and 4, and the pressing body 8 is provided between the bottom portion 1b of the cylindrical body 1 and the pressing body 8. As shown in FIGS. 2 and 4, the spring 6 is inserted into the cylindrical body 1 as shown in FIG. 4, and at this time, the engaging step portion 1a is engaged as shown in FIG. Forcibly insert it from the upper part of the cylinder 1 against the elasticity of the locking bullet 7 to be fitted.

In the present invention, a rectangular prism with a cover as shown in FIGS. 1 and 5 is used as the pressing body 8, and the upper projecting portion of the movable contact piece 5 is inserted into the upper center hole 8a of FIG. As shown in FIG. 4, the engaging pieces 5b, 5b are temporarily fixed by engaging the pressing body step edge 8b from the upper part of the insulating cylinder body 1 as described above. It is assembled by press fitting against elasticity.

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 further, the shape of the cylindrical bottom portion 1b may be any shape as long as the spring 6 can be received by the chitin. A shape other than the shape may be used.

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 into the left and right insertion holes 2 and 2 of the insulating cylinder body 1 from the bottom thereof.

Further, even if the winding diameter of the spring 6 is increased to the vicinity of the inner wall facing the cylindrical body 1, the spring 6 can prevent the spring 6 from being deformed or misaligned without causing a short circuit between the contact pieces 3 and 4. 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.

By assembling the movable contact piece 5 provided in the pressing body 8 by narrowing both ends of the movable contact piece 5 through the contact portions 5a, 5a, the movable contact piece 5 does not significantly protrude from the pressing body 8 to the outside, so that the cylindrical body 1 It can be easily inserted automatically.

Since the present invention has the above-described structure, the pressing body 8 is always held against the insulating cylindrical body 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 cylindrical body. 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 elasticity of the spring 6 by closing the door, the contact portion 5a of the movable contact piece 5 is removed from the pair of contact surfaces 3a and 4a. 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, and the pressing body 8 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.

[0022]

[Effect of device]

 Since the present invention is configured as described above, it has the following effects. The pair of fixed contact pieces 3 and 4 can easily insert and fix a simple band into the insertion hole 2 and 2 of the insulating cylinder 1 from the lower part thereof to realize automatic insertion and assembly. Since No. 4 can be press-punched from the same punching die, it has the first effect that the die cost is reduced by half and parts management is easy compared to the left and right variant.

In particular, in the present invention, most of the pair of fixed contact pieces 3 and 4 is concealed and housed in the cylindrical body insertion holes 2 and 2, so that it is 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 cylindrical body, the inner wall and the eaves of the spring 6 do not cause a short-circuit between the fixed contact pieces 3 and 4 so that the spring 6 can be deformed. Also, there is a third effect that the upper and lower sides of the spring 6 do not have to be supported by bosses or the like, and the spring 6 itself can be automatically inserted into the cylindrical body 1 easily.

Further, the movable contact piece 5 provided in the pressing body 8 has a fourth effect that it can be easily inserted into the cylindrical body 1 by performing a narrow interval between the contact portions 5a, 5a 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 removed, and it has the 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.

In summary, in the self-returning push switch according to the present invention, the left and right fixed contact pieces 3 and 4 and the coil spring 6, the pressing body 8 and the movable contact piece 5 mounted therein are arranged in the order described above. With this, a drip-proof self-resetting push switch can be easily manufactured by simply and coaxially inserting it into the insulating cylinder body 1 which is the housing of the push switch. There is.

[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.

[Explanation of symbols]

 1 Insulating cylinder 1a Locking step 1b Bottom 2 Insert hole 3,4 Fixed contact piece 3a, 4a Opposing contact surface 5 Movable contact piece 5a Contact part 6 Spring 7 Locking piece 8 Pressing body

Claims (1)

[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. Self-projecting having locking bullets 7 inserted into the cylindrical body 1 against the spring 6 having a relatively large winding diameter on the bottom portion 1b of the insulating cylindrical body 1 to be engaged with the locking step portion 1a. The push switches each including the pressing body 8 and.