JPH0245940Y2 - - 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 of 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 member and having a hollow part for inserting the shaft, and a first body fixedly disposed on the body. a second fixed contact member fixed to the body with an insulating member interposed on the first fixed contact member, an end plate of the body and the first and second fixed contacts. a shaft that is inserted through a through hole provided in the member and the insulating member and the hollow portion and is always given a resilient force in one direction by a resilient member; The first fixed contact edge and the second fixed contact edge formed around the through hole of the fixed contact member of
A second contact member formed around the through hole of the fixed contact member of
a movable contact member having a common movable contact protrusion that comes into contact with the fixed contact edges of the first and second fixed contact edges, and the common movable contact protrusion is configured so that the common movable contact protrusions simultaneously come into sliding contact with the first and second fixed contact edges. It is something that

(Configuration of an 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, and a spring 7.

As shown in FIGS. 1, 2, and 3, the body 1 is made of an insulating material such as synthetic resin for casting and has a stepped front plate 12 on the inside of one end.The body 1 has a front plate 12 having a diameter smaller than a hollow portion (to be described later) on the other end. The cylindrical body 11 has a through hole 14 through which the shaft main body can be inserted, and an end plate 13 provided with a pair of locking recesses 15a and 15b on the side surface. It has a hollow part 16 consisting of a small diameter part into which it can be inserted, and the outside of the other end of the cylindrical body 11 has a hook having a wedge-shaped cross section for locking the locking claws 33a, 33b of the second fixed contact member 3. Locking recesses 17a and 17b are provided.

As shown in FIGS. 1, 2, and 3, the first fixed contact member 2 is formed of a conductive metal member, and has a cylindrical protrusion 20 with an outer diameter that fits into the through hole 14. A disk-shaped mounting seat 21 having a through hole 22 and a diameter smaller than the diameter of the end plate 13 has a pair of locking claws 23 bent to one side in the diametrical direction.
a, 23b are provided, and the other side is provided with the first connecting portion 2.
5 is provided.

As shown in FIGS. 1, 2, and 3, the second fixed contact member 3 is made of the same electrically conductive and elastic metal member as the first fixed contact member, and A second fixed contact piece 31 in the shape of a disk having a through hole 32 having approximately the same diameter as the hole 22 and having a diameter approximately equal to the diameter of the end plate 13 is provided with a second fixed contact edge 30 and extends. A locking means 34 formed with locking claws 33a and 33b cut and raised inward near the existing end.
a, 34b, and locking elastic pieces 36a, 36 whose end portions serve as attachment portions 35a, 35b which also serve as second connection portions.
b is provided.

The movable contact member 6 is formed of a conductive metal member as shown in FIGS. 1, 2, and 3,
The mounting seat 61 having the mounting hole 62 is provided with a shared movable contact protrusion 63 having a height that allows it to penetrate until it is substantially flush with the lower surface of the cylindrical protrusion 20 of the first fixed contact part 24. is the first fixed contact edge 2
4 and the second fixed contact edge 30, this shared movable contact protrusion 63 is configured to slide into contact with the same movable contact edge 30 at the same time.

That is, as shown in FIGS. 2 and 3, each of the above-mentioned structural members is placed on the end plate 13 of the body 1 so that the locking claws 23a, 23b of the first fixed contact member 2 are in the locking recesses 15a, 15b. Stack them so that they fit into each other,
On top of this, an insulating member 4 is superimposed, which is made of synthetic resin and has a circular plate member 42 having a diameter substantially the same as that of the end plate 13, and a through hole 41 having a diameter substantially the same as that of the through hole 14 in the center thereof.
Further, the second fixed contact member 3 is placed on top of this, and the locking means 34a and 34b are placed on top of it.
The locking claws 33a, 33b of the body 1 are inserted into the locking recesses 17a, 17b provided on the outside of the body 1, and the spring 7 is inserted as a resilient member into the hollow part 16 of the body 1, and the push button 9 is pressed. The other end of the shaft 5, which is integrally formed with
22, 41, and 32 are passed through and protruded to the outside, and the movable contact member 6 is caulked to the end portion 51 through the attachment hole 62 through the caulking portion 52 provided there, thereby completing the assembly as a push switch PS.

(Function of the invention) As shown in FIG. 2, in this push switch PS, the shaft 5 to which the movable contact member 6 is attached is operated by the elastic force of the spring 7 installed in a slightly compressed state between the end plate 13 and the push button 9. As a result, the shared movable contact protrusion 63 comes into contact with the first fixed contact edge 24, and
The shared movable contact protrusion 63 simultaneously slides into contact with the second fixed contact edge 30, and the electric wire connected to the first connection part 25 is connected to the push switch PS via the attachment part that also serves as the second connection part 35a, 35b. It connects to the conductive casing that is attached to it, and closes the electrical circuit of the indoor light, turning on the indoor light.

Next, when the push button 9 is pushed against the elasticity of the spring 7, the shaft 5 moves along with the movable contact member 6 in the direction in which the push button 9 moves into the hollow portion 16.
the first and second fixed contact edges 2.
4, 30, the common movable contact protrusion 63 is separated, and the electrical circuit is opened, so that 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 for pressing the push button 9 is removed, the elasticity of the spring 7 restores the circuit to the closed state shown in FIG.

At this time of restoration, the first and second fixed contact edges 2
4, 30 and the movable contact protrusion 63, which are shared by the movable contact protrusion 63, have a sliding contact due to their shape, so that the self-cleaning action of the contact part is performed, and dirt is removed from the contact part.

(Effects of the invention) As described above, this invention includes a body made of an insulating member and having a hollow part for inserting the shaft, a first fixed contact member fixedly disposed on the body, and a first fixed contact member fixedly disposed on the body. a second fixed contact member attached to the body with an insulating member interposed on the fixed contact member; a penetration provided in the end plate of the body; the first and second fixed contact members; and the insulating member. a shaft that is inserted through the hole and the hollow portion and is always 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 located around the through hole of the first fixed contact member. The formed first fixed contact edge and the second
A second contact member formed around the through hole of the fixed contact member of
a movable contact member having a common movable contact protrusion that comes into contact with the fixed contact edges of the first and second fixed contact edges, and the common movable contact protrusion is configured so that the common movable contact protrusions simultaneously come into sliding contact with the first and second fixed contact edges. Since the connecting wire is not attached to the movable part, there are no connection failures or short circuits caused by fatigue breaking of the wire connection or loosening of the mounting screw, and the contact point is not attached to the movable part while sliding. The self-cleaning action is performed, and contact failures due to contact portion dirt are less likely to occur, and 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, Figure 2 is a sectional view of the fixed contact edge and shared movable contact protrusion, and Figure 3 is a fixed contact switch. FIG. 6 is a cross-sectional view of the contact edge and the common movable contact protrusion separated from each other; 1...Body, 13...End plate, 14, 22, 3
2, 41, 62...Through hole, 16...Hollow part, 2
...First fixed contact member, 24...First fixed contact edge, 3...Second fixed contact member, 30...Second
fixed contact edges, 34a, 34b...locking means, 3
6a, 36b...Locking step piece, 4...Insulating member, 3
5a, 35b... Connection portion, 5... Shaft, 6...
...Movable contact member, 63...Common movable contact projection, 7
...Spring member (spring).

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
The first contact member formed around the through hole of the fixed contact member of
a movable contact member having a shared movable contact protrusion that contacts both the fixed contact edge and the second fixed contact edge formed around the through hole of the second fixed contact member; A push switch characterized in that a shared movable contact protrusion is configured to simultaneously slide into contact with first and second fixed contact edges.