JPS6110277Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a small switch used for switching electronic tuners of car radios, etc., which has a simple structure, has a small number of parts, can be manufactured at low cost, and operates reliably.

Various switches of this kind have been developed in the past, but in all of them, the opening and closing operations of the contact parts are perpendicular to the direction of movement of the operating part, so it is not possible to arrange many switches side by side on a printed circuit board. Even so, it was difficult to operate the operating part, and the external size was large, the operating contact pressure was weak, and the switching speed was slow, so the operating point was often burned out by sparks.

The present invention was developed based on the above points, and the purpose is to provide a compact switch that can be placed side by side on a printed circuit board, has a smaller external size, has strong contact pressure, and has a faster switching speed. do.

An embodiment shown in FIGS. 1 to 8 will be described below. Reference numeral 1 denotes a rectangular base, and a cylindrical protrusion 2 is formed protrudingly from the center thereof. This protrusion 2
A stepped portion 3 is formed on the surface. Reference numerals 4 and 5 indicate support members protruding from opposite sides of the base 1 near the corresponding sides thereof. Each of the support members 4 and 5 is connected to the back surface of the base 1, and has a common terminal 6 protruding from the connecting portion 12 thereof. There is. Each support member 4, 5 has a recess 7, 7, 8, 8 on each side thereof. Reference numeral 9 denotes an actuating member, which has Z-shaped legs 10, 10 facing each other so as to sandwich the protrusion 2, and connecting the two at right angles, with engagement protrusions 11, 11 protruding left and right at both ends. connecting part 12
This connecting portion has an ear portion 13. This ear portion 13 projects on the opposite side of the leg portions 10,10. Bent pieces 14, 14 obtained by bending the ends of the legs 10, 10 downward at right angles are inserted into small holes 15, 15 provided in the base 1. The connecting portion 12 of the actuating member 9 is located between the supporting members 4 and 5, and the engaging protrusions 11 and 11 at both ends are adapted to engage with the upper end of one of the recesses 8 and 8 of the supporting members 4 and 5. It is set as. Reference numeral 16 denotes a first terminal member bent into an L-shape, which includes a horizontal portion 17 parallel to the base 1 and vertical portions 18 and 19 bent downward perpendicularly to the horizontal portion 17, respectively. have The vertical part 18 is the base 1
Similarly, the vertical portion 19 protrudes to the lower surface of the base, and the protruding portion serves as a first terminal 20.
Thus, the first fixed contact 21 is located below the horizontal portion 17. Further, a second fixed contact 22 is buried in the upper surface of the base 1 directly below and opposite to the horizontal portion 17. Reference numeral 23 designates a second terminal that is integrated with the second fixed contact 22 and protrudes from the lower surface of the base 1. Reference numeral 24 denotes a U-shaped movable piece, each end of which has both parallel legs 25, 26 engages with each recess 7, 7 of the support members 4, 5, and each leg 2
The outer vertical upright pieces 27, 28 of 5, 26 extend slightly forward from both sides, and their inner sides contact the respective outer sides of the support members 4, 5. A bridging piece 29 bridges both sides of the movable piece 24, and has a movable contact 30 in the center thereof. This movable contact 30 is exposed on the front and back sides of the bridging piece 29, and the upper surface is in contact with the first fixed contact 21, and the lower surface is in contact with the second fixed contact 22, respectively.

Both ends of springs 31 and 32 are engaged between the connecting portion 12 of the actuating member 9 and the bridging piece 29 of the movable piece 24. Therefore, the actuating member 9 has its respective spring 3
Due to the elasticity of the legs 10, 10, the bent pieces 14, 14 of the legs 10, 10 and the small holes 15, 15 of the base rotate clockwise in the figure, but the engagement Projections 11, 11 and recesses 8, 8 of support members 4, 5
Further rotation is prevented by engagement with the upper end.

Similarly, the movable piece 24 also rotates counterclockwise in the figure due to the elasticity of the respective springs 31 and 32; 1 fixed contact 21), further rotation is prevented. In this way, the actuating member 9 and the movable piece 24 are connected to the springs 31 and 32.
A toggle mechanism is constructed, and the movable piece 24 is activated by operating the actuating member 9 as described later.
is used for joint operation, and the movable contact 30 can be rapidly reversely switched between the first fixed contact 21 and the second fixed contact 22.

The base 1 is covered with a square cover 33.
Near the bottom of both sides of this cover 33 are rectangular elongated holes 3.
4 and 35 are provided, and arcuate small bulges 36 and 37 are provided on both sides of the base 1 facing the respective elongated holes 34 and 35.

However, by molding both the base 1 and the cover 33 from synthetic resin, the cover 33 has some elasticity, and force is applied to the lower edges of each elongated hole 34, 35 to push the lower edges outward. spread out the base 1
The cover 33 is engaged with the base 1 by inserting the small bulges 36, 37 into the elongated holes and then removing the force. A square hole 3 is located in the center of the top surface of the cover 33.
It has 3H. Reference numeral 38 denotes an operation unit that slides inside the cover 33, and includes a flat plate part 39 that comes into contact with the upper and lower surface of the cover 33, a push button 41 that projects upward from the flat plate part 39 and has a recess 40 inside, and a part of the flat plate part 39. It has a protrusion 42 that extends downward along the inside of the cover 33 on the side, and leg parts 43 and 44 that hang down from both corners of the flat plate part 39 on the other side, facing the protrusion 42 . A spring 45 is inserted between the recess 40 of the push button 41 and the step 3 of the protrusion 2 of the base 1 so as to surround the protrusion.

The projection 42 has an engagement hole 46 with which the ear 13 of the operating member 9 is engaged.

As is clear from the above, the operating section 38 is operated by the spring 45.
Due to the elasticity of the flat plate portion 39, the flat plate portion 39 is deflected until it comes into contact with the upper and lower surface of the cover 33, and due to this displacement, the protrusion portion 4
The second engagement hole 46 engages with the ear portion 13 of the actuating member 9 to deflect the actuating member 9 as shown in FIG. 2b.

Therefore, in this state, the movable piece 24 is
Due to the elasticity of contacts 1 and 32, the movable contact 30 is also deflected as shown in FIG.
is in contact with.

Due to this contact, the common terminal 6, the supporting members 4, 5,
Movable piece 24, movable contact 30, first fixed contact 2
1. A circuit including the first terminal 20 is formed. The lengths of the protrusion 42 and the legs 43 and 44 of the operating section 38 are selected so that when the operating section 38 is operated, each other end comes into contact with the upper surface of the base 1, as will be described later.

Next, the operation of the switch of this invention will be explained. Now, when the push button 41 of the operation part 38 is pressed against the elasticity of the spring 45, the upper surface of the engagement hole 46 of the protrusion 42 engages with the ear part 13 of the actuation member 9, and the actuation member 9
is rotated counterclockwise in the figure about the insertion portion between the bent pieces 14, 14 of the legs 10, 10 and the small holes 15, 15 of the base 1. In this state, the locking portions of the springs 31 and 32 on the operating member 9 side are deflected downward, so the elasticity of both springs 31 and 32 causes the movable piece 24 to move between its legs 25 and 26 and the support member 4. ,5
The movable contact 30 is instantaneously rotated clockwise around the engagement portion with each of the recesses 7 and 8, and the movable contact 30 is switched from the first fixed contact 21 to the second fixed contact 22 side.

This state is shown in FIG. 2a. Therefore, in this state, the common terminal 6, the support members 4 and 5, the movable piece 24, the movable contact 30, the second fixed contact 22, and the second
A circuit including terminals 23 is formed.

However, for example, a self-holding relay (not shown) is connected to this circuit to perform switching of the electronic tuner as described above. After such actuation, when the pressing force of the push button 41 is removed, the operating portion 38 returns to the position shown in FIG. ear part 13
are engaged, and the actuating member 9 is rotated clockwise in the opposite direction to the above. Therefore, the movable piece 24 is connected to the springs 31, 3
Due to the elastic force of 2, the movable contact 30 is moved counterclockwise in the opposite direction to the above, and the movable contact 30 is switched to the first fixed contact 21 side again. If a miniature light bulb or the like is connected to the circuit including this first fixed contact 21 and inserted into the recess 40 of the push button 41, the miniature light bulb will blink when the contact is switched as described above, making it easier to press the push button in a dark place. Used to confirm location, etc.

As described above, according to the present invention, the supporting members 4, 5, the movable piece 24, the actuating member 9, the springs 31, 3
2 constitutes a toggle mechanism, and the legs 25 and 26 of the movable piece 24 engage in point contact with the recesses 7 and 7 on the sides of the support members 4 and 5, respectively,
Further, when the actuating member 9 is operated to move downward, the elasticity of the actuating member 9 itself and the elasticity of the springs 31 and 32 stretched between the actuating member 9 and the movable piece 24 act to reverse the movable piece 24. As a result, switching is possible quickly, and as a result, no spark is generated between the fixed and movable contacts 21, 22, and 30.
A compact switch that can perform switching reliably, has strong contact pressure, can be placed side-by-side on a printed circuit board, and has a small external size can be obtained.

[Brief explanation of the drawing]

Figures 1a, b, and c are a right side view, a bottom view, and a bottom view, respectively, showing an embodiment of a small switch according to this invention.
The front view and FIGS. 2A and 2B are for explaining the operating state of the same embodiment, and FIG. 3 is a cross-sectional view taken along the - line of FIG. Fig. 4 is an enlarged perspective view of the push button of the embodiment, Fig. 5 is an enlarged plan view of the operating member of the embodiment, and Fig. 6 is the operation of the embodiment. FIG. 7 is a plan view of the member and a perspective view of the first terminal of the same embodiment. 1...Base, 2...Protrusion part, 3...Step part,
4, 5... Support member, 6... Common terminal, 7, 8...
... recess, 9 ... operating member, 10 ... leg, 11 ...
...Engaging protrusion, 12...Connection part, 13...Ear part, 1
4...Bent piece, 15...Small hole, 16...First terminal member, 17...Horizontal part, 18, 19...Vertical part, 20...First terminal, 21...First terminal member Fixed contact, 22... Second fixed contact, 23... Second terminal, 24... Movable piece, 25, 26... Foot part, 2
7, 28...Rising piece, 29...Bridging piece, 30...
...Movable contact, 31, 32...Spring, 33...Cover, 34, 35...Elongated hole, 36, 37...Small bulge, 33H...Square hole, 38...Operation unit, 39
... Flat plate part, 40 ... Recess, 41 ... Push button, 42
... protrusion, 43, 44 ... leg, 45 ... spring,
46...Engagement hole.

Claims (1)

[Scope of utility model registration request] A base made of an insulator that is plate-shaped and has a protrusion in the center and a small arc-shaped bulge on opposing sides, and a support member that has terminals planted opposite each other on the upper surface of the base. and is formed into a substantially gate shape so as to sandwich the protrusion, each leg at its free end is supported by the base, and a bridge portion of a connecting piece with the leg is engaged with one side of each support member. and the bridging part includes an actuating member having ears, a movable piece formed in a substantially U-shape, each leg of which engages with the other side of the support member, and having movable contacts on both sides; a first contact member having first and second springs provided on sides of the piece and the actuation member, a first contact facing one of the movable contacts, supported by the base and having a terminal; and a second contact member having a second contact facing the other movable contact, also supported by the base and having a terminal, and a second contact member having a cylindrical shape and fitting the base,
a cover having an opening on an upper surface; an operating member that moves within the cover, has an engaging portion with the ear, projects upwardly from the opening, and has a recess inside; A small switch characterized in that the moving direction of the operating member, which is a spring inserted between the protruding portion of the base, and the driving direction of the movable contact coincide with each other.