JPH0523366U - Push switch - Google Patents

Abstract

(57) [Abstract] [Purpose] By temporarily fixing the movable contact piece of the push switch to the pressing body, etc., and inserting and assembling it into the bottomed cylinder,
Promote assembly automation. [Structure] Insulating bottomed cylinder 1 with locking protrusion 1a formed
And a pair of fixed contact pieces 3 and 4 arranged so as to partially oppose the inner walls 2 and 2 of the bottomed cylindrical body 1, and a movable contact of substantially inverted U-shape slidably contacting each of these fixed contact pieces 3 and 4. A locking step edge 7 which is provided in the bottomed cylindrical body 1 with a piece 5 and a spring 6 between the bottomed cylindrical body 1 and the bottom portion 1b of the bottomed cylindrical body 1 and which is to be engaged with the locking protruding edge 1a. And the free ends 5b, 5b passing through the contact portions 5a, 5a of the movable contact piece 5 provided on the pressing body 8 and the window end of the pressing body 8.
It was assembled by elastically contacting the inner edge of 8b.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a push switch that can be easily assembled automatically by arranging a pressing body to which a movable contact piece is temporarily fixed so as to be capable of self-projecting inside a bottomed cylinder.

[0002]

[Prior Art]

 A push switch of this type is conventionally disclosed in, for example, Japanese Utility Model Laid-Open No. 63-82327.

In this conventional technique, a front plate for attachment formed of an insulating member, a body having a hollow portion for inserting a shaft in the center, and a pair of contact member insertion members formed outside the hollow portion of the body are provided. A first fixed contact member inserted and locked in one of the attachment holes from one end side of the body, and a second fixed contact member inserted and locked in the other contact member insertion hole from the other end side of the body. , A stepped push shaft inserted in the hollow part by an elastic member so as to always apply an elastic force with a protruding tendency to the body, and fixed to the end of the stepped push shaft. A movable contact member which is inserted into the member insertion hole from one end side of the body and which has a pair of conductive bullets so as to make sliding contact with the first fixed contact member and the second fixed contact member. It is composed.

[0004]

[Problems to be solved by the device]

 In the above-mentioned conventional technique, when the movable contact member is attached to the end portion of the push shaft, the rectangular protrusion of the end portion has to be inserted into the square hole of the contact member. Assembly is poor due to the limited amount and the need to tighten screws for mounting.

Further, when the push shaft is pushed, the movable contact member attached to the end portion of this shaft is pushed out from the hollow portion of the body to the outside, so an insulating cover for preventing contact with other equipment is required, and the parts are The number of points increases and the cost increases.

Further, an elastic member must be attached to the shaft before the movable contact member is attached to the shaft, and the movable contact member must be attached to the shaft by screwing against the elastic force of the elastic member. There were many problems in that the assembly could not be assembled easily due to the time fluttering member flying off and it was dangerous.

According to the present invention, in order to eliminate the above-mentioned problems, the movable contact piece is inserted into the pressing body, and both ends passing through the contact portion are elastically contacted with the inner edge of the window hole of the pressing body. Assemble while preventing falling off from the pressing body, and by arranging the pressing body movably in the bottomed cylinder and limiting the protrusion amount with its locking bullets, the assemblability is improved and the insulating cover is installed. The purpose is to reduce costs by eliminating them.

[0008]

[Means for Solving the Problems]

 The above-mentioned object of the present invention is to provide an insulating bottomed cylindrical body having a locking projection formed on the inner surface thereof, and a pair of fixed contact pieces arranged so as to partially face the inner wall of the bottomed cylindrical body. The stationary contact piece has a substantially U-shaped movable contact piece slidably contacting the fixed contact piece, and a spring is interposed between the movable contact piece and the bottom portion of the bottomed cylindrical body to be inserted into the bottomed cylindrical body and engage with the locking projection edge. And a self-projecting pressing body having a locking step edge, each free end passing through a contact portion of the movable contact piece provided on the pressing body at an inner edge of a window hole of the pressing body. It can be achieved by elastically contacting and assembling.

Further, a projecting edge negative groove may be formed on the upper portion of the insulating cylindrical body outside the locking projecting edge.

[0010]

[Operation] The push body for operating the push switch according to the present invention is always elastically urged in a direction projecting from the bottomed cylinder by a spring provided between the bottomed cylinder and the bottom of the bottomed cylinder, and is inserted into the pusher. The contact portion of one bullet piece of the substantially inverted U-shaped movable contact piece is fixed to one fixed contact piece fixed to the opposing wall of the bottomed cylindrical body, and the contact portion of the other bullet piece is the other fixed contact piece. The fixed contact pieces are brought into contact with each other, and the movable contact pieces bridge the fixed contact pieces, whereby the switch is turned on. When the pressing body is inserted deeply into the bottomed cylinder against the elastic force of the spring, the contact part of the other movable piece of the movable contact part comes off from the short fixed contact part and contacts the edge wall of the hollow part. As a result, the fixed contact pieces are open, so that the switch can be turned off.

Then, the pressing body is engaged with the snap protrusion formed on the inner surface of the bottomed cylindrical body at the locking step edge by one-time engagement with the snap against the elastic force of the pressing body material, for example, plastic. The amount of protrusion is limited to prevent removal, and when assembling the push switch, each free end that passes through the contact portion of the movable contact piece provided on the pressing body is elastically contacted with the inner edge of the window hole of the pressing body. By temporarily fixing the movable contact piece to the pressing body, the pressing body equipped with this movable contact piece can be automatically mounted by easily engaging the bottomed cylindrical body with one touch.

[0013]

【Example】

 Examples will be described with reference to the drawings. First, as shown in FIGS. 1 and 2, the basic structure of the present invention is to provide an insulating cylindrical body 1 made of plastic or the like having a locking projection 1a and a spring receiving portion a, and the cylindrical body 1 facing each other. The inner wall 2, 2 is provided with a fixed contact piece 3, 4 made of a pair of metal plates or the like arranged so as to partially face each other as shown in FIGS. 3 and 5.

As shown in FIG. 3, each fixed contact piece 3, 4 is provided with a movable contact piece 5 made of substantially inverted U-shaped phosphor bronze or the like which slides as shown in FIG. As shown in the same figure, the spring 6 is inserted between the receiving portion a and the receiving portion a, and the spring 6 is inserted into the cylindrical body 1 and a self-projecting pressing force having a locking step edge 7 to be engaged with the locking projection edge 1a. And a body 8 respectively.

Further, in this invention, a rectangular prism with a lid is used as the pressing body 8, and the free ends 5b, 5b passing through the contact portions 5a, 5a of the movable contact piece 5 provided through the center boss 8a thereof are The push switch of this invention is made by elastically contacting and assembling the inside of the window 8b of the pressing body 8 as shown in FIG.

In each figure, reference numeral 1e is a cylindrical body for preventing the spring from slipping, which is provided on the bottom portion 1b of the bottomed cylindrical body 1 by fixing the lower portion of the spring 6 to the bottom portion 1b. If not necessary.

A slope portion 7a is formed below the locking step edge 7 of the pressing body 8 as shown in FIG. 2 so that the locking projection edge 1a of the bottomed tubular body 1 can easily pass therethrough.

The above configuration will be described more specifically below. As shown in FIG. 1, the bottomed cylinder 1 used in the present invention has an outer flange 1c provided on the upper end side of a rectangular cylindrical main body made of plastic, and a fixed contact piece 3 is attached to the outer flange 1c. A fixed contact piece insertion hole 15 that communicates with the recess 13 and the hollow portion 14 of the bottomed cylindrical body 1 having a rectangular shape is opened.

A groove 142 with which one contact portion 5a of the movable contact piece 5 described later is slidably contacted is formed in the facing inner wall 2 of the fixed contact piece insertion hole 15 as shown in FIGS. 1 and 3, and The opposite inner wall 2 facing the opposite inner wall 2 has a groove 144 on which the other contact portion 5a is slidably contacted, and a fixed contact piece insertion groove 145 and a locking hole 146 are provided on the groove bottom and the groove side wall in each of the above-mentioned drawings, particularly. It is provided as shown in FIG.

The pressing body 8 is made of plastic and shaped like a square cylinder with a lid, and has a small-diameter and long-sized center boss 8a inside, and a continuous connection of a pushing shaft 8c and a center boss 8a that are larger than the boss 8a and are sufficiently short. A holding portion for the spring 6 and the movable contact piece 5 is provided inside the portion, and window holes 8b, 8b for contacting a pair of side plates to prevent the pressing body 8 from rotating are provided through.

Further, for example, a pair of locking step edges 7 and 7 having a size capable of engaging with, for example, a pair of locking projection edges 1a formed on the inner wall of the hollow portion of the bottomed cylindrical body 1 are provided. It is formed on the opposite side of the pressing body 8.

The movable contact piece 5 is formed of an elastic strip-shaped conductive plate such as phosphor bronze, and a shaft hole 5d through which the center boss 8a is inserted is opened in the center of the movable contact piece 5 and the base portion 5c is centered at the same side on both sides. Bend to the outside and bend the ends closer to this side to form an eight shape, and bend the ends outward so that it is bent into a U shape. The movable contact piece 5 is inserted into the center boss 8a, and the free ends 5b and 5b of the movable contact piece 5 that pass through the contact portions 5a and 5a are elastically contacted with the inner edge of the window 8b of the pressing body 8. And assemble.

The fixed contact piece 4 is formed such that one end side of a belt-shaped conductive plate having a width that can be inserted into the fixed contact piece insertion groove 145 is slightly narrowed to form the plug portion 41 and the wide portion side is bent and locked. The protrusion 42 is provided.

As the fixed contact piece 4, instead of the plug part 41, a fixed contact piece to which a lead wire is connected by means such as crimp connection may be used.

The other fixed contact piece 3 has a shape in which one end side of the conductive plate can be fitted in the concave portion 13 and the center is bent straight, and the other end side having a shorter length than the fixed contact piece 4 is attached. The fixed contact piece insertion hole 15 is press-fitted and locked.

In the push switch of the present invention, as shown in FIG. 1, the push switch 8 has the center boss 8a of the pressing body 8 inserted through the shaft hole 5d of the movable contact piece 5 and the contact portion 5a of the movable contact piece 5 as shown in FIG. The free ends 5b, 5b are elastically contacted with the inner edge of the window 8b of the pressing body 8 to prepare a temporarily fixed state.

Then, the fixed contact piece insertion groove 145 and the fixed contact piece insertion holes 15 are used to lock the fixed contact pieces 3 and 4, respectively, to the projection 42, the locking hole 146, and the edge of the enlarged opening and the opening edge, respectively. To do.

When the upper part of the spring 6 is inserted into the center boss 8a of the pressing body 8 and the pressing body 8 is inserted from its lower end into the tubular portion 1e in the bottomed cylindrical body 1, the contact portion 5a of the movable contact piece 5 is inserted. Can be inserted while being compressed inward, and subsequently, the locking step edge 7 against the elastic force of the spring 6 against the elastic force of the material in the vicinity thereof and slightly curved inward relative to each other as shown in FIG. If it is continuously inserted into the bottom cylindrical body 1, the state shown in FIG. 8 is reached, and as shown in FIGS. 3, 5 and 7, the locking step edge 7 snaps to the locking projection edge 1a by the elasticity of the material in the vicinity thereof. This is completed by engaging the return member with and preventing the pressing body 8 from coming off.

9 and 10 show another embodiment of the present invention. In this embodiment, in order to make the locking projection edge 1a easier to bend as shown in FIG. 10, a negative portion is formed on the outer side of the projection edge 1a. This is an example in which the groove 1 f is formed.

FIG. 11 shows still another embodiment of the present invention. In this embodiment, instead of the cylindrical portion 1e of the above-mentioned embodiment, the center portion 1b of the bottomed cylindrical body 1 is inserted into the lower part of the spring 6 to form a center box. 1d is provided to prevent the spring 6 from shifting.

The push switch of the present invention is as described above, and its application is a door switch of an automobile, etc., and FIGS. 3, 5 and 7 show a state when the door is opened. The body 8 rises in the bottomed cylindrical body 1 by the elasticity of the spring 6 until the locking step edge 7 contacts the locking projection edge 1a, and one contact portion 5a of the movable contact piece 5 contacts the fixed contact piece 3. Since the other contact part 5a is always in contact with the fixed contact piece 4, the mounting member is a metal plate of the vehicle body and is connected to the negative electrode of the battery, and the plug part 41 of the fixed contact piece 4 is connected to the positive electrode of the battery via the interior light. If it is, open the door to turn on the interior light.

When the door is closed, the push shaft 8c of the pressing body 8 is pushed in by the door as shown in FIGS. 4, 6 and 8, so that the contact portion 5a of the movable contact piece 5 is disengaged from the fixed contact piece 3 and has a bottom. Since it contacts the opposing inner wall 2 of the tubular body 1, even if the other contact portion 5a is in contact with the fixed contact piece 4, the interior lamp is turned off.

When the pressing body 8 moves up and down in the bottomed cylindrical body 1 in this way, the outer peripheral surface of the pressing body 8 slidably contacts the inner surface of the bottomed cylindrical body 1 and moves smoothly up and down without tilting. The protruding amount of the pressing body 8 can be limited by engaging and locking the locking step edges 7, 7 with the locking projection edges 1a, 1a formed on the inner surface of the bottomed cylindrical body 1.

[0034]

[Effect of the device]

 Since the present invention is configured as described above, it has the following effects. In the push switch according to claim 1, the self-projecting pressing member formed by a spring is engaged with the engaging projection edge formed on the inner surface of the bottomed cylindrical body at the engaging step edge by utilizing the elasticity unique to the pressing body material. By stopping it, the protruding amount is limited to prevent it from being pulled out, and it can be easily mounted in the bottomed cylinder by one-touch snap and one-shot with the elasticity, and the assembly work can be easily automated. It has the first effect.

Further, the free ends 5b, 5b passing through the contact portions 5a, 5a of the movable contact piece 5 provided in the pressing body 8 are elastically contacted with the inner edge of the window hole 8b of the pressing body 8 and temporarily fixed. Therefore, the movable contact piece 5 does not inadvertently fall off from the pressing body 8 to the outside during the assembling, so that it is easy to assemble into the bottomed cylindrical body 1 and it is possible to prevent a misassembly accident during automatic assembly. There is also.

Further, since the movable contact piece can be moved by the pressing body inside the insulating bottomed cylinder, an insulating cover for dust prevention and short-circuit accident prevention is not required, which is advantageous in terms of cost and space. There is also a third effect.

According to the second aspect of the present invention, since the locking projection edge 1a is pushed into the negative groove 1f, it is possible to add the effect of facilitating the engaging engagement with the locking step edge 7 of the pressing body 8. ..

[Brief description of drawings]

FIG. 1 is a vertical sectional elevation view of a central portion showing an exploded example of the push switch of the present invention.

FIG. 2 is a perspective view in which the pressing body and the movable contact piece are also separated from each other.

FIG. 3 is a vertical sectional elevation view of a central portion showing an assembled state of the one shown in FIG.

FIG. 4 is a vertical sectional elevation view of a central portion in a state different from that of FIG.

FIG. 5 is a vertical sectional side view of a central portion in a cutting direction different from that of FIG.

FIG. 6 is a vertical sectional side view of the central portion, which is also in a state different from that of FIG.

FIG. 7 is a plan view drawing taken along the line of FIG.

FIG. 8 is a partially enlarged sectional view showing a state in which a locking step edge is locked to a locking projection edge of the push switch of the present invention.

FIG. 9 is a vertical sectional side view of a central portion showing another embodiment of the main part of the present invention.

FIG. 10 is a partially enlarged cross-sectional view showing a state in which the locking step edge is locked to the locking projection edge of the one shown in FIG.

FIG. 11 is a vertical sectional elevation view of a central portion of a bottomed cylindrical body showing still another embodiment of the present invention.

[Explanation of symbols]

 1 Cylindrical body 1a Locking edge 1b Bottom part 1f Edge edge Negative groove 2 Opposing inner wall 3,4 Fixed contact piece 5 Movable contact piece 5a Contact part 5b Free end 6 Spring 7 Locking step edge 8 Pressing body 8a Center boss 8b Window hole

Claims (2)

[Scope of utility model registration request] 1. An insulative bottomed cylinder 1 having a locking projection 1a formed on the inner surface thereof, and a pair of fixed contact pieces arranged so as to partially oppose the inner walls 2, 2 of the bottomed cylinder 1. 3, 4 and a fixed contact piece 3, 4 each of which has a substantially U-shaped movable contact piece 5 slidingly contacting the fixed contact piece 3, 4 and a bottom portion 1b of the bottomed cylindrical body 1 with a spring 6 interposed therebetween. The movable contact piece provided in the pressing body 8 is provided with a self-projecting pressing body 8 having a locking step edge 7 to be engaged with the locking protruding edge 1a. A push switch assembled by elastically contacting the free ends 5b, 5b passing through the contact portions 5a, 5a of 5 with the inner edge of the window hole 8b of the pressing body 8. 2. An insulating cylindrical body 1 on the outside of the locking projection 1a.
The push switch according to claim 1 or 2, wherein a flange negative groove 1f is formed on an upper portion of the push switch.