JPH0713889B2 - Seesaw switch - Google Patents

Description

The present invention relates to a structure for electrically connecting a movable contact piece of a seesaw switch to a common contact. In particular, the movable contact piece of the seesaw switch is supported by a rigid fulcrum member, and the protruding portion of the movable contact piece protruding from this fulcrum member is sandwiched from the side surface by a conductive elastic member, and the protruding portion and the elastic member The present invention relates to a seesaw switch that maintains an electrical connection by sliding contact.

[Prior Art] A seesaw switch of a type in which a protruding portion of a movable contact piece is sandwiched between elastic members to maintain electrical connection is already known (Japanese Utility Model Laid-Open No. 60-35424). FIG. 5 is an exploded perspective view of a conventional seesaw switch of this type. In this seesaw switch, the two protrusions 32 and 33 of the movable contact piece 31 are connected to the fulcrum member 34.
Insert it into the notches 35 and 36 of the
It's sandwiched between 7. The movable contact piece 31 is a fulcrum surface 38 of the fulcrum member 34,
39, which can be swung on the sliding surface 40 of the protrusions 32, 33 of the movable contact piece 31,
41 is in sliding contact with the elastic member 37 to maintain an electrical connection.

In the case of a method of obtaining an electrical connection only between the movable contact piece 31 and the fulcrum surfaces 38, 39, this contact portion becomes a rolling contact, so that the contact resistance increases due to electrolytic corrosion during use. . In the structure shown in FIG. 5, since the sliding surfaces 40 and 41 of the movable contact piece 31 and the elastic member 37 are electrically contacted with each other, the contact portion is always polished by the sliding contact, and the contact resistance is small. It is kept.

[Problems to be Solved by the Invention] In the above-described conventional seesaw switch, since the movable contact piece 31 is held only by the elastic force of the elastic member 37, if an impact force or the like is applied to the entire switch, sliding will occur. The movable contact piece 31 is an elastic member on the side of the contact that is not pressed against the rod.
It may come off from 37.

The object of the present invention is to prevent the movable contact piece from coming off once assembled in the seesaw switch of the type described above.
Moreover, it is to provide a seesaw switch that is easy to assemble.

[Means for Solving the Problems] In the seesaw switch of the present invention, the fulcrum member is provided with two walls facing each other, one wall is provided with a through hole, and the contact member is provided on the elastic member outside thereof. It is provided. The other wall of the fulcrum member is provided with a notch that opens in one direction, and a through window is provided on the elastic member outside the notch. A contact of an elastic member is brought into contact with a protruding portion of the movable contact piece protruding from the through hole, and a protruding portion of the movable contact piece protruding from the notch is protruded from a through window of the elastic member.

[Operation] When the movable contact piece is installed in the seesaw switch,
Since one protruding portion of the movable contact piece is passed through the through hole of the fulcrum member, the edge of this through hole serves as a stopper so that the protruding portion does not come off. Then, the protruding portion comes into contact with the contact of the elastic member for electrical connection. The other protruding portion of the movable contact piece is above the notch of the fulcrum member, but since it is passed through the through window of the elastic member on the outside thereof, the edge of this through window serves as a stopper and the protruding portion is It doesn't come off. Both protrusions are thus prevented from coming off by the edges.

When assembling the movable contact piece, one protrusion of the movable contact piece is pushed through the through hole of the fulcrum member and pressed against the contact of the elastic member, while the other protruding portion of the movable contact piece pushes the elastic member. While expanding, it can be positioned in the cutout by being inserted into the through window, and thus the movable contact piece can be incorporated as described above.

Embodiments Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

FIG. 1 is an exploded perspective view showing an embodiment of the seesaw switch of the present invention. This seesaw switch is mainly
A movable contact piece 1, a rigid fulcrum member 2, a conductive elastic member 3,
It consists of fixed contacts 4,5. Contacts 6 and 7 are fixed to both ends of the movable contact piece 1, and protrusions 8 and 9 are formed in the center.

Two walls 10 and 11 facing each other are formed in the fulcrum member 2, and a rectangular through hole 12 is formed in one wall 10,
The other wall 11 is formed with a notch 13 that opens upward. The protrusion 8 of the movable contact piece 1 can be inserted into the through hole 12, and the opposite protrusion 9 can be inserted into the notch 13. The fulcrum surfaces 14 and 15 of the through hole 12 and the notch 13 are movable contact pieces 1
These protruding portions 8 and 9 are supported to make these point contacts.
The fulcrum member 2 is formed with two legs 16 and 17, and the substrate 1
It is adapted to be bent on the back side of the substrate 18 through the openings 19 and 20 of 8.

Two elastic plates 21 and 22 facing each other are formed on the elastic member 3, and a contact 23 is provided on one elastic plate 21. A rectangular through window 24 is formed in the other elastic plate 22. The contact 23 is adapted to be in sliding contact with the sliding surface 25 of the protruding portion 8 of the movable contact piece 1. The other protruding portion 9 of the movable contact piece 1 penetrates the through window 24.

Next, a method for assembling this seesaw switch will be described. First, the legs 16 and 17 of the fulcrum member 2 are connected to the openings 19 and 19 of the insulating substrate 18.
Pass it through 20, and fold it behind the substrate 18. At that time, the elastic member 3 is sandwiched between the fulcrum member 2 and the substrate 18, and the fulcrum member 2
Legs 16 and 17 of the elastic member 3 pass through the notches 26 of the elastic member 3. Next, one protrusion 8 of the movable contact piece 1 is connected to the through hole of the fulcrum member 2.
Thread 12 FIG. 2 is a sectional view showing the state at this time, and the movable contact piece 1 is cut along the line AA in FIG. While pushing the contact piece 23 of the elastic member 3 outward by the projecting portion 8 of the movable contact piece 1, the other projecting portion 9 is cut out in the notch 13
To the other elastic plate 22 of the elastic member 3 and pressed. Since the upper portion 27 of the elastic plate 22 is inclined outward,
The elastic plate 22 bends outward. The protruding portion 9 of the movable contact piece 1 is an elastic plate.
As shown in FIG. 3, the elastic plate 22 returns to its original state when it enters the through window 24 of 22 and the movable contact piece 1 is pushed by the contact 23 to the left in the drawing. At this time, the shoulder portion 28 (FIG. 1) of the movable contact piece 1 contacts the wall 11.

In this way, the movable contact piece 1 can be easily incorporated in the seesaw switch by one operation. Moreover, there is no fear that the movable contact piece 1 once attached will come off. That is, the one protruding portion 8 of the movable contact piece 1 is pressed to the left and downward in FIG. 3 by the contact 23, and does not come off. The other projecting portion 9 of the movable contact piece 1 is located in the through window 24, and even if the projecting portion 9 is to be disengaged upward, it only hits the upper edge of the through window 24.

In this embodiment, the contact piece 23 also presses the projecting portion 8 of the movable contact piece 1 downward, but the contact piece may apply only a lateral force. That time,
Even if the protruding portion 8 of the movable contact piece 1 tries to come off upward, the through window 12
Just hit the top edge of.

FIG. 4 is a vertical sectional view for explaining the operation of this seesaw switch. The movable contact piece 1 is cut along the line BB in FIG. A sliding rod 29 is pressed against the movable contact piece 1, and the movable contact piece 1 can be swung by moving it to the left and right in the drawing. As a result, the contacts 6 and 7 of the movable contact piece 1 are fixed contacts 4,5.
Selectively contact. In this case, the elastic member 3 and the fulcrum member 2 are common contacts, and the sliding surface 25 of the movable contact piece 1 (first
By making sliding contact with the contactor 23 (FIG. 1) of the elastic member 3, the electric connection is maintained between the movable contact piece 1 and the common contact.

As described above, according to the present invention, the movable contact piece of the seesaw switch is supported by the rigid fulcrum member, and the protruding portion of the movable contact piece protruding from the fulcrum member is provided by the side surface by the conductive elastic member. In the seesaw switch, which is sandwiched from above and maintains electrical connection by sliding contact between the protrusion and the elastic member, a through hole of the fulcrum member and a contact of the elastic member are provided for one protrusion of the movable contact piece. In addition to supporting in combination, the other protruding portion of the movable contact piece is configured to support the notch of the fulcrum member and the through window of the elastic member in combination, so in a supporting state in which the movable contact piece is incorporated. Since any of the protrusions is in a state of penetrating the through hole or the through window, it is possible to reliably prevent the detachment, and it is very easy to incorporate the movable contact piece into such a supported state. It has the effect of being simple.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of an embodiment of the seesaw switch of the present invention, FIGS. 2 and 3 are vertical sectional views for explaining an assembling method of the seesaw switch shown in FIG. 1, and FIG. 4 is FIG. FIG. 5 is a vertical sectional view for explaining the operation of the seesaw switch shown in FIG. 5, and FIG. 5 is an exploded perspective view of a conventional seesaw switch. 1 ... movable contact piece 2 ... fulcrum member 3 ... elastic member 8,9 ... projecting part of movable contact piece 10, 11 ... wall of fulcrum member 12 ... through hole of fulcrum member 13 ... of fulcrum member Notch 23 …… Contact of elastic member 24 …… Through window of elastic member

 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) References Microfilm (JP, U ) A microfilm (JP, U) obtained by photographing the contents and drawings attached to the application of Japanese Utility Model Application No. 57-197418 (Japanese Utility Model Application No. 59-105734).

Claims (1)

[Claims] 1. A movable contact piece of a seesaw switch is supported by a rigid fulcrum member, and a protruding portion of the movable contact piece projecting from the fulcrum member is sandwiched by a conductive elastic member from a side surface thereof, and the protruding portion and the elastic member. In a seesaw switch that maintains electrical connection by sliding contact with a member, two walls facing each other are provided on the fulcrum member, a through hole is provided on one wall, and a contact is provided on the elastic member on the outside thereof. A notch that opens in one direction is provided on the other wall of the fulcrum member, and a through window is provided outside the notch on the elastic member, and the elastic portion is provided at the protruding portion of the movable contact piece protruding from the through hole. A seesaw switch characterized in that a contact of a member is brought into contact, and a protruding portion of the movable contact piece protruding from the notch is protruded from a through window of the elastic member.