JPH0245939Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Field of Application) This invention relates to a push switch, and more specifically, to a push switch which eliminates the need to attach a connecting wire to a movable part and has a self-cleaning function of the contacts.

(Prior art) In a conventional push switch, a movable contact and a connecting wire are attached to a shaft that is integrated with the push button, so each time the switch is operated, the connecting wire also moves within the movement range of the shaft, resulting in long-term problems. The connected wires become fatigued due to long movement, and the weight of the connected wires and the vibrations caused by the movement act to loosen the set screws, resulting in poor contact, and the connection wires move with the shaft. The necessary space must be set aside for
In addition, there was a drawback that a large amount of installation space had to be reserved.

(Purpose of the invention) The object of this invention is to solve the above-mentioned drawbacks, and to provide a push switch that is highly reliable, does not require a large installation space, and has a self-cleaning function for the contacts.

(Summary of the invention) In order to achieve the above-mentioned object, the push switch of this invention includes a body made of an insulating material and having a hollow part for inserting the shaft, and a first fixing member having a connecting part in the body. a second fixed contact member that locks the contact member with a locking means formed on a locking elastic piece with an insulating member interposed therebetween; an end plate of the body; the first and second fixed contact members; and an insulating member. a shaft that is inserted into a through hole provided in the shaft and the hollow portion and is constantly applied with a resilient force in one direction by a resilient member; and a shaft that is fixed to an end of the shaft and the first fixed contact. a movable contact member having first and second movable contact parts that contact the first fixed contact part formed on the member and the second fixed contact part of the second fixed contact member; The first and second movable contact portions are configured to be in sliding contact with the first and second fixed contact portions.

(Configuration of the embodiment of the invention) As shown in FIG. 1, the push switch PS of this invention includes a body 1, a first fixed contact member 2,
It is composed of a second fixed contact member 3, an insulating member 4, a shaft 5, a movable contact member 6, a spring 7, and a mounting screw 8.

As shown in FIGS. 1, 2a and 2b, and 3a and 3b, the body 1 is made of an insulating material such as synthetic resin for casting, and has a front plate 12 having an inner step at one end, and a front plate 12 (described later) at the other end. A through hole 14 through which the shaft main body can be inserted has a diameter smaller than that of the hollow portion, and a pair of locking recesses 15 on the sides.
A cylindrical body 11 having an end plate 13 provided with a and 15b
is a hollow portion 16 consisting of a large diameter portion into which a push button (described later) can be inserted and a small diameter portion into which a spring 7 can be inserted.
On the outside of the other end of the cylindrical body 11, hooking recesses 17a and 17b having a wedge-shaped cross section are provided for locking the locking claws of the second fixed contact member 3.

The first fixed contact member 2 is shown in FIGS. 1 and 2 a and b.
As shown in FIGS. 3a and 3b, it is made of a conductive metal member, has a through hole 22 with the same diameter as the through hole 14, and has a disk shape with a smaller diameter than the end plate 13. The mounting seat 21 has a pair of locking claws 23a and 23b bent to one side in the diametrical direction.
However, on one side in the diametrical direction orthogonal to this diametrical direction, there is a trapezoidal first fixed contact portion 24 bent in a direction opposite to the bending direction of the locking pawl, and on the other side, there is a first fixed contact portion 24. connection portions 25 are provided respectively.

The second fixed contact member 3 is shown in FIGS. 1 and 2 a and b.
As shown in FIGS. 3a and 3b, it is made of the same conductive and elastic metal member as the first fixed contact member, and has a through hole 32 having the same diameter as the through hole 14. , a disk-shaped second fixed contact piece 31 having a diameter substantially equal to the diameter of the end plate 13 includes:
A locking pawl 33 extends through the fixed contact portions 31a and 31b and is cut inward near the extending end.
Locking means portions 34a, 34b formed with a, 33b
and a mounting part 35 whose end side also serves as a second connection part.
Locking bullet pieces 36a and 36b designated as a and 35b are provided.

The movable contact member 6 is formed of a conductive metal member as shown in FIGS. A pair of first movable contact parts 63 are provided with a space such that the substantially central part of the first fixed contact part 24 can penetrate into the first fixed contact part 24. Movable contact portions 64a, 6
4b respectively protrude, and the second movable contact portion 6
4a and 64b are bent into a figure eight shape.

The above-mentioned components are shown in Figures 2a, b and 3.
As shown in Figures a and b, the locking claws 23a and 23 of the first fixed contact member 2 are placed on the end plate 13 of the body 1.
A through hole 14 is formed in the center of a disk member 41 made of synthetic resin and having approximately the same diameter as the end plate 13.
The insulating member 4 with a through hole 41 having the same diameter as the insulating member 4 is stacked on top of the insulating member 4, and the second fixed contact member 3 is placed on top of the insulating member 4, and the locking means portion 34a,
The locking claws 33a, 33b of 34b are inserted into the locking recesses 17a, 17b provided on the outside of the body 1 and are locked, and the spring 7 is inserted as a resilient member into the hollow part 16 of the body 1 at one end. The other end of the shaft 5 integrally formed with the push button 9 is inserted through the through holes 14, 22, 41, and 32 of the end plate 13, the mounting seat 21, the insulating member 4, and the second fixed contact portion 31 to the outside. The movable contact member 5 is passed through the screw hole 51 provided therein into the screw hole 62 provided thereon, and is attached with the attachment screw 8, thereby completing the assembly as a push switch PS.

(Operation of the invention) This push switch PS has a shaft 5 to which a movable contact member 6 is attached, as shown in FIGS. 2a and 2b.
The first movable contact portion 63 comes into contact with the first fixed contact portion 24 due to the elastic force of the spring 7 installed in a slightly compressed state between the end plate 13 and the push button 9, and the second fixed contact portion 63 contacts the first fixed contact portion 24. Second movable contact portions 64a and 64b are in contact with the portions 31a and 31b, respectively, and the electric wire connected to the first connection portion 25 is connected to the push switch via the attachment portion that also serves as the second connection portion 35a and 35b. It connects to the conductive case where the PS is attached, and closes the electrical circuit of the interior light, etc., turning on the interior light.

Next, when the push button 9 is pushed against the elasticity of the spring 7, as shown in FIGS. moves forward until it hits a step formed at the point where the large diameter portion and the small diameter portion of the
a and 64b are separated, the electrical circuit is opened, and the interior light can be turned off.

In this manner, the circuit is opened while the push button 9 is pressed, and when the force pushing the push button 9 is removed, the elasticity of the spring 7 restores the circuit to the closed state shown in FIGS. 2a and 2b.

At the time of this restoration, the first and second fixed contact parts 2
4, 31a, 31b and the first and second movable contact portions 63, 64a, 64b come into sliding contact with each other due to their shapes, and the self-cleaning action of the contact portions is performed to remove dirt from the contact portions. .

(Effects of the invention) As described above, this invention connects a body made of an insulating member and having a hollow part for shaft insertion, and a first fixed contact member having a connection part in the body with an insulating member interposed. a second fixed contact member that is engaged by a locking means formed on a bullet stopper; a through hole provided in the end plate of the body; the first and second fixed contact members; and the insulating member; and the hollow space. a shaft that is inserted into the shaft and is always applied with a resilient force in one direction by a resilient member; and a first fixing member that is fixed to the end of the shaft and formed on the first fixed contact member. a movable contact member having first and second movable contact parts that contact the contact part and the second fixed contact part of the second fixed contact member, the first and second fixed contact parts; Since the first and second movable contact portions are configured to be in sliding contact with the
Since the connecting wire is not attached to the movable part, there are no connection failures or short circuit accidents caused by fatigue breaking of the wire connection or loosening of the mounting screw, and the contact point is self-cleaning while sliding. is carried out,
In addition to being less likely to cause poor contact due to contamination of the contact portion, assembly can be automated and manufacturing can be done at low cost.

[Brief explanation of the drawing]

The figures show one embodiment of this invention. Figure 1 is an exploded perspective view of the push switch, and Figures 2a and 2b are cross-sectional views of the fixed contact and movable contact in contact with each other. and side view of main parts,
FIGS. 3a and 3b are both a cross-sectional view and a side view of the main part in a state where the fixed contact part and the movable contact part are separated. 1...Body, 13...End plate, 14, 22, 3
2, 41... Through hole, 16... Hollow part, 2... First fixed contact member, 24... First fixed contact part,
3... Second fixed contact member, 31... Second fixed contact part, 34a, 34b... Locking means, 36a,
36b...Locking step piece, 4...Insulating member, 35a,
35b... Connection portion, 5... Shaft, 6... Movable contact member, 63... First movable contact portion, 64a,
64b...Second movable contact portion.

Claims (1)

[Scope of utility model registration request] A body formed of an insulating member and having a hollow portion for shaft insertion, a first fixed contact member fixedly disposed on the body, and an insulating member interposed on the first fixed contact member. a second fixed contact member that is engaged with the body, a resilient member that is inserted through a through hole provided in the end plate of the body, the first and second fixed contact members, and the insulating member, and the hollow portion; a shaft to which a resilient force is always applied in one direction; and a shaft fixed to an end of the shaft and the first
a movable contact member having first and second movable contact portions that respectively contact a first fixed contact portion formed on the fixed contact member and a second fixed contact portion of the second fixed contact member; 1. A push switch, characterized in that said first and second movable contact portions are configured to come into sliding contact with said first and second fixed contact portions.