JPS59134512A - Method of assembling push switch - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is directed to a method of assembling a bushing switch.

Conventionally, in car audio equipment, etc.? It is known that a bush switch for switching the circuit is integrally provided at the rear stage of the knob. This type of bush switch consists of a large number of parts, such as a switch piece, a cam body that switches the switch piece, a drive body that rotates the cam body, and a spring that returns the drive body. The assembly work is complicated, and especially when the switch device becomes small, the assembly work is extremely difficult.

SUMMARY OF THE INVENTION An object of the present invention is to provide a bushing switch that overcomes the above-mentioned drawbacks and is easy to assemble.

In order to achieve this object, the present invention integrally forms a ratchet on the side of a cam body having a support shaft, a switch piece is erected on a pair of matable boards, and a reciprocating drive body is provided. A pair of elastic claws is provided, and an engaging claw portion is provided inside the case that extends in the same direction as the fitting direction of the two boards, and the two boards are fitted so that the switch piece comes into elastic contact with the cam body. Then, the support shaft of the cam body is supported by a side board, and the drive body is inserted into the cam body so that both pawls come into contact with the ratchet, and these side boards, the cam body, and the drive body are connected in advance to one A block body is constructed, and by inserting this block body into the case with a spring inside, the locking protrusion formed on the substrate engages with the locking claw portion to fix the block body within the case. It is characterized by the following.

Embodiments of the present invention will be described below based on the drawings.

A plurality of grooves 1 a + 1 extending in the horizontal direction are formed on the opposing inner walls of the insulating case 1 which has an open bottom and one side.
b + 1 c is formed, and a driving body 3 is slidably fitted into the upper groove 1a via a spring 2. This driving body 3 is made of synthetic resin, and has a first pawl 3a bent diagonally downward at the top, a second pawl 3b bent diagonally upward at the bottom, and both. Both claws 3a and 3b have elastic force, and their tips face each other. A pair of substrates 4 and 5 made of synthetic resin are inserted into the lower groove 1c of the case 1. A bottle 6a and a bottle hole 6b are formed on the opposing surfaces of each of the substrates 4 and 5, and by fitting the bottle 6a of one substrate into the bottle hole 6b of the other substrate, the side substrate 4,
5 is designed to be integrated. In addition, the side substrates 4 and 5
Engagement protrusions 4B+5a are formed on each of the upper parts, and the engagement protrusions 4a of the rear substrate 4 are engaged with horizontally extending retaining claws 1d formed on the case 1, whereby the substrate 4. 5 is designed to prevent it from falling off from the insulating case 1. Furthermore, support walls 4b and 5b are provided on the side substrates 4 and 5, respectively, and are opposed to each other.
A hook-shaped notch 4e+5c is formed at the upper end of 5b. Two elastic switch pieces 7 are provided on one of the substrates 4, and two elastic switch pieces 8 are similarly provided on the other substrate 5, a total of four pieces being erected by insert molding. These switch pieces 7 and 8 are arcuate protrusions 7a.

8a, and by fitting and combining the side boards 4 and 5, the switch piece 7 and the switch piece 8 face each other,
One set of switch pieces 7 and 8 constitutes one switch S1, and the other set of switch pieces 7 and 8 constitutes the other switch s2.

The ratchet 9 has eight protrusions 9a equidistantly spaced around its circumference, and four protrusions 10 on both sides of the ratchet 9.
A cam body 10 in which four recesses 10b are alternately formed is integrally formed, and a support shaft 11 is formed from both cam bodies 10.
are integrally formed with a protrusion. This support shaft 11 is inserted into the groove 1b IIC in the center of the case 1, and is located in each of the notches 4c*5e of the support walls 4b and 5b, and is located between the groove 1b and the notch 4Cz5. It is regulated by c and is rotatable.

Each pawl 3ap3b of the drive body 3 can come into contact with the protrusion 9a of the ratchet 9, and the two sets of switch pieces 7 and 8 can contact each cam body 10 with the cam body 1o.
It is in elastic contact as if pinching. 12 is the volume (
(not shown), etc., and
A large-diameter ring 13 that can come into contact with the driving body 3 is fitted at the tip of the shaft 12 .

Next, the assembly process of the above-mentioned switch device will be explained based on FIG. 6.

First, the side substrates 4 and 5 are fitted and fixed by inserting the bottle 6a into the bottle hole 6b. Next, the notch 4 of the side board 4゜5
The support shaft 11 of the cam body 1o is rotatably engaged with the concave portion formed by c and 5c, and the protrusions 7a and 8a of each switch piece 7 and 8 are brought into elastic contact with both cam bodies 10. Furthermore, the second
Deform the pawl 3b and push the drive body 3 into the cam body 1o, and insert both pawls 3m+3b into the upper and lower protrusions 9a of the ratchet 9.
to face. Through the above steps, the side substrates 4 and 5,
A cam body 1o including a ratchet 9 and a support shaft 11, and a drive body 3
becomes one block body A.

On the other hand, on the case 1 side, a guide bin 14 is inserted into a guide hole 1e formed in the rear wall of the case 1, and the spring 2 is disposed at the rear inside the case 1 while being guided by the guide bin 14. The driving body 3 is placed in the upper groove 1a, the support shaft 11 is placed in the middle groove 1b, and the side substrates 4 and 5 are placed in the lower groove 1c.
When the block body A is inserted into the case 1, the guide bin 14 is pushed out of the case 1 by the drive body 3, and the spring 2 is automatically pushed into the protrusion 3C formed on the rear wall of the drive body 3. fit into the target. When the block body A is further pushed into the case 1, the retaining claw portion 1d provided on the case 1 is engaged with the engagement protrusion 4a provided on the rear substrate 4, so that the block body A is pushed into the case 1. and the side substrate 4.5 is tightly fitted. The above assembly work can be easily performed because the direction in which the side substrates 4.5 are fitted and the direction in which the engaging claws 1d are engaged are the same.

Next, the switching operation will be explained based on FIGS. 2 to 5. FIG. 2 shows the on state, in which the protrusions 7a and 8a of the switch pieces 7 and 8 are located in the recess 10b of the cam body 10, and the switch pieces 7 and 8 are in contact at their upper ends.

When the drive body 3 is pushed into the case 1 by the shaft 12, the drive body 3 moves to the left while compressing the spring 2, and the upper protrusion 9& of the ratchet 9 is pushed by the first pawl 3a of the drive body 3. is sent in the counterclockwise direction by
(See Figure 3). At this time, the lower protrusion 9a of the ratchet 9 bends the second pawl 3b of the driver 3 downward and overcomes it. Therefore, in the above-described operation, the first pawl 3a takes part in the feeding operation of the ratchet 9, while the second pawl 3b acts as a detent to prevent the ratchet 9 from rotating in the opposite direction.

When the pressing force on the shaft 12 is removed, the driving body 3 moves to the right due to the elastic force of the spring 2 and returns to its original position, as shown in FIG. When the driver 3 moves to the right, the second pawl 3b pushes the protrusion 9a that it had previously climbed over, and the ratchet 9 is further sent counterclockwise. At this time, the upper protrusion 9a of the ratchet 9 bends the first pawl 3a upward and overcomes it. Therefore, the driving body 3 described above
In the return operation, the first pawl 3a acts as a detent for the ratchet 9, and the second pawl 3b participates in the feeding operation.

2 to 4 show one reciprocating movement of the driving body 3, and as is clear from the above explanation, in one reciprocating movement of the driving body 3, the ratchet 9 moves by one protrusion 9a, that is, 45 Sent once. Therefore, the cam body 10 integrally provided on the side of the ratchet 9 also rotates 45 degrees in one reciprocation of the drive body 3, and the switch piece 7, which was located in the recess 10b in FIG.
The protrusions 7a and 8a of 8 come into contact with the protrusion 10m in FIG. Projection 7 a * 8 a is projection 10m
When it comes into contact with , the switch pieces 7 and 8 are spread apart so that their upper ends are separated, and the switch pieces 7 and 8 are turned off. Therefore, one reciprocating movement of the driver 3 switches the switches S1*S2 from the on state shown in FIG. 2 to the off state shown in FIG. 4.

Then, when the driver 3 is pushed into the case 1 again, the fifth
As shown in the figure, the first pawl 3a pushes the protrusion 9a and sends the ratchet 9, so that the protrusion 7a of the switch pieces 7, 8
, 8a transition from the convex portion 10& to the concave portion 10b, and the upper end of the switch 7.8 contacts.

When the driver 3 is returned by the spring 2, the second pawl 3b
pushes the protrusion 9a and sends the ratchet 9, returning to the state shown in FIG. 2. Therefore, the switch 81aS2 is switched from the off state shown in FIG. 4 to the on state shown in FIG. 2 by one reciprocating movement of the driver 3.

In this way, when the driver 3 is pushed once, the switch is switched from on to off, and when it is pushed again, it is switched from off to on, and this is repeated thereafter.

In the above-mentioned embodiment, two sets of switch pieces 7 and 8 are provided, and two
Although the two switches S1+82 are simultaneously switched by one cam body 10Vc, the number of switches is not limited to the above embodiment (for example, one set of switch pieces 7 and 8 and one cam body 10.Also, one switch may be switched by the protrusion 9a of the ratchet 9, the protrusion 10a of the cam body 10, and the recess 1.
The number of ゜b also depends on whether the number of protrusions 9a is the convex portion 10a or the concave portion 10.
It is not limited to the above embodiment as long as the relationship of twice b is maintained.

The method for assembling the bush switch according to the present invention is as described above, and therefore, even if the switch device becomes smaller, it is possible to easily assemble each component.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and FIG. 1 is a plan view of a bushing switch, FIG. 2 is a cross-sectional view thereof, and FIGS. 3, 4, and 5 are partial cross-sections for explaining the switching operation. figure,
FIG. 6 is an explanatory view showing the assembly process, and FIG. 7 is an exploded perspective view. DESCRIPTION OF SYMBOLS 1... Case, 1d... Engaging claw part, 2... Spring, 3... Drive body, 3a... First claw, 3b...
・Second claw, 4.5... Board, 4a... Engaging protrusion,
7, 8... Switch piece, 9... Ratchet, 10 Force human body, 11... Support shaft, 14... Guide pin, A...
・Block type. Brain 1 Figure 112wJ Group 8116 @Figure 7

Claims (1)

[Claims] A ratchet is integrally formed on the side of the cam body that has a support shaft,
A switch piece is provided upright on a pair of matable boards, a pair of elastic claws are provided on a reciprocally movable driving body, and an engagement member extends inside the case in the same direction as the mating direction of both boards. A pawl portion is provided, and both substrates are fitted so that the switch piece comes into elastic contact with the straining body, and the support shaft of the cam body is supported by both substrates, and further, the pawl portion is configured such that both the pawls come into contact with the ratchet. By inserting a driving body into the cam body, forming one block body in advance with these two substrates, the cam body, and the driving body, and inserting this block body into the case in which a spring is installed, the substrate 1. A method for assembling a bushing switch, characterized in that the block body is fixed in a case by engaging an engaging protrusion formed on the retaining claw portion with the retaining claw portion.