JPS63304541A - Seesaw switch - Google Patents

Abstract

PURPOSE:To facilitate assembly of a switch and eliminate risk of a movable contact piece slipping off after assembly, by threading protrusions of the movable contact piece in a through hole of a fulcrum member and a through window of a resilient member. CONSTITUTION:Walls 10, 11 facing each other are provided at a fulcrum member 2, wherein the wall 10 is provided with a rectangular through hole 12 while the wall 11 with a notch 13 opening upward. One of the protrusions 8 of a movable contact piece 1 is inserted in this through hole 12 while the other protrusion 9 in the notch 13. A rectangular through window 24 is formed in one of the resilient plates 22 of a resilient member 3, and the protrusion 9 penetrates this through window 24. A slide rod 29 is pressed to this movable contact piece 1, which is slided by moving the rod 29 to the left and right. Consequently contacts 6, 7 of the contact piece 1 are put in contact with fixed contacts 4, 5 selectively, and the slide surface 25 of the contact piece 1 makes slide contact with a slider 23 of the resilient member 3. Thus electrical connection is maintained.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a structure for electrically connecting a movable contact piece of a seesaw switch to a common contact point.

In particular, a movable contact piece of a seesaw switch is supported by a rigid fulcrum member, a protrusion of the movable contact protruding from the fulcrum member is sandwiched from the side by a conductive elastic member, and a gap between the protrusion and the elastic member is This invention relates to a seesaw switch that maintains electrical connection by sliding contact.

[Prior Art] A seesaw switch of the type in which the protrusion of a movable contact piece is sandwiched between elastic members to maintain electrical connection is already known (
FIG. 5 is an exploded perspective view of this type of conventional seesaw switch. In this seesaw switch, two protrusions 32 and 33 of a movable contact piece 31 are inserted into notches 35 and 36 of a fulcrum member 34, and are sandwiched between conductive elastic members 37 from both sides. The movable contact piece 31 can swing on the fulcrum surface 38, 39 of the fulcrum member 34, and the sliding surfaces 40, 41 of the protrusion 32, 33 of the movable contact piece 31 slide into contact with the elastic member 37 to generate electricity. maintains a physical connection.

In the case of a method in which electrical connection is obtained only between the movable contact piece 31 and the fulcrum surface 38, 39, this contact portion becomes a rolling contact, and as it is used, the contact resistance increases due to electrolytic corrosion. . What is shown in FIG. 5 is the sliding surface 4 of the movable contact piece 31.
0.41 and the elastic member 37, the contact portion is always polished by sliding contact and the contact resistance is kept small.

[Problems to be Solved by the Invention] In the conventional seesaw switch described above, the movable contact piece 31 is held only by the elastic force of the elastic member 37, so if an impact force is applied to the entire switch, it may slide. The movable contact piece 31 may come off upward from the elastic member 37 on the contact side that is not pressed against the rod.

An object of the present invention is to provide the above-mentioned type of seesaw switch without the risk of the movable contact piece coming off once assembled.
Moreover, it is an object of the present invention 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 elastic member is provided with a contact on the outside thereof. It is a provision. The other wall of the fulcrum member is provided with a notch that opens in one direction, and the elastic member is provided with a through window on the outside thereof. A contactor of the 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 made to protrude from the through window of the elastic member.

[Function] When the movable contact piece is assembled into the seesaw switch,
One protrusion of the movable contact piece is passed through the through hole of the fulcrum member, so it will not come off, and the other protrusion of the movable contact piece is passed through the through window of the elastic member, so it will not come off. do not have. When assembling the movable contact piece, pass one protrusion of the movable contact piece through the through hole of the fulcrum member and press it against the contact of the elastic member, and insert the other protrusion of the movable contact piece into the notch of the fulcrum member. It can be inserted into the through-hole while pushing and expanding the elastic member.

[Embodiments] Hereinafter, embodiments of the present invention will be described in detail 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 and 5.

Contacts 6 and 7 are fixed at both ends of the movable contact piece 1, and protrusions 8 and 9 are formed in the center.

The fulcrum member 2 is formed with two opposing walls 10, 11, one wall 10 is formed with a rectangular through hole 12, and the other wall 11 is provided with a notch 13 that opens upward. It is formed. 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. Support surface 14 of through hole 12 and notch 13
．． 15 supports the protrusions 8.9 of the movable contact piece 1 and makes rolling contact therewith. The fulcrum member 2 has two legs 16.
17 is formed and is adapted to be passed through an opening 19.20 in the substrate 18 and bent on the back side of the substrate 18.

The elastic member 3 is formed with two facing elastic plates 21 and 22, and one of the elastic plates 21 is provided with a contactor 23. A rectangular through window 24 is formed in the other elastic plate 22. The contactor 23 is adapted to come into sliding contact with a sliding surface 25 of the protrusion 8 of the movable contact piece 1. The other protruding portion 9 of the movable contact piece 1 passes through the through window 24.

Next, we will explain how to assemble this seesaw switch. First, the legs 16 and 17 of the fulcrum member 2 are passed through the openings 19 and 20 of the insulating substrate 18 and bent on the back side of the substrate 18.

At that time, the elastic member 3 is sandwiched between the fulcrum member 2 and the substrate 18, and the legs 16 and 17 of the fulcrum member 2 are inserted into the notches 2 of the elastic member 3.
Pass 6. Next, one protrusion 8 of the movable contact piece 1 is passed through the through hole 12 of the fulcrum member 2. FIG. 2 is a sectional view showing the state at this time, and the movable contact piece 1 is cut along line AA in FIG. While pushing the contact 23 of the elastic member 3 outward with the protruding part 8 of the movable contact piece 1, the other protruding part 9
is inserted into the notch 13 of the fulcrum member 2 from above and pressed against the other elastic plate 22 of the elastic member 3. Since the upper part 27 of the elastic plate 22 is inclined outwardly, the elastic plate 22 is deflected outwardly. When the protruding portion 9 of the movable contact piece 1 enters the through window 24 of the elastic plate 22, the elastic plate 22 returns to its original position as shown in FIG. It will be in a state where it is pushed in the direction. At this time, the shoulder portion 28 of the movable contact piece 1 (
1) comes into contact with the wall 11.

In this way, the movable contact piece 1 can be easily incorporated into the seesaw switch with one operation. Moreover, once the movable contact piece 1 is attached, there is no risk of it coming off. That is, one protrusion 8 of the movable contact piece 1 is pressed leftward and downward in FIG. 3 by the contactor 23.
It won't come off the top. The other protrusion 9 of the movable contact piece 1 is located inside the through window 24, and even if the protrusion 9 tries to come off upward, it will only hit the upper edge of the through window 24.

In this embodiment, the contact 23 also presses the protrusion 8 of the movable contact piece 1 downward, but the contact may be of a type that applies purely lateral force. At that time, even if the protrusion 8 of the movable contact piece 1 tries to come off upward, it only hits the upper edge of the through window 12.

FIG. 4 is a vertical sectional view illustrating the operation of this seesaw switch. The movable contact piece 1 is cut along 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 this to the left and right in the drawing. As a result, the contacts 6 and 7 of the movable contact piece 1 selectively contact the fixed contacts 4 and 5. In this case, the elastic member 3
and the fulcrum member 2 are common contacts, and the sliding surface 25 (FIG. 1) of the movable contact piece 1 is the contact 23 (FIG. 1) of the elastic member 3.
By making sliding contact with the movable contact piece 1 and the common contact, electrical connection is maintained between the movable contact piece 1 and the common contact.

[Effects of the Invention] As explained above, the present invention combines the through hole of the fulcrum member and the contact of the elastic member on one side of the seesaw switch, and the notch of the fulcrum member and the contact of the elastic member on the other side. Since it is combined with a through window, the movable contact piece can be easily installed in one operation, and there is no risk of the movable contact piece coming off once it is installed.

[Brief explanation of the drawing]

FIG. 1 is an exploded perspective view of an embodiment of the seesaw switch of the present invention, FIGS. 2 and 3 are vertical cross-sectional views illustrating a method of assembling the seesaw switch shown in FIG. 1, and FIG. 4 is the same as that shown in FIG. 5 is a vertical sectional view illustrating the operation of the seesaw switch shown in FIG. 5. FIG. 5 is an exploded perspective view of a conventional seesaw switch. 1... Movable contact piece 2... Fulcrum member 3... Elastic member

Claims (1)

[Scope of Claims] A movable contact piece of a seesaw switch is supported by a rigid fulcrum member, and a protrusion of the movable contact piece protruding from the fulcrum member is sandwiched from the side by a conductive elastic member, so that the protrusion and the In a seesaw switch that maintains electrical connection by sliding contact with an elastic member, the fulcrum member is provided with two walls facing each other, one wall is provided with a through hole, and the elastic member is provided with a contact on the outside thereof. A notch opening in one direction is provided in the other wall of the fulcrum member, a through window is provided in the elastic member outside the notch, and a protruding portion of the movable contact piece protruding from the through hole has a notch that opens in one direction. A seesaw switch characterized in that contacts of elastic members are brought into contact with each other, and a protruding portion of the movable contact piece protruding from the notch is made to protrude from a through window of the elastic member.