JPH0448595Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a push button switch using a seesaw cam, and more particularly to a push button switch that can be easily switched between two operation modes, momentary operation and alternate operation.

[Prior Art] Conventionally, push button switches have been widely used in various electronic and electrical devices because of their good operability, and the most common operating mode is the momentary switch. These include actions and alternate actions.

Momentary operation is also called instantaneous operation, in which the contact part of the switch is closed by pressing down on the pushbutton in its axial direction, and when the force pressing the pushbutton is removed, it immediately returns to its original state and the switch is activated. On the other hand, in an alternate operation, when the push button is pressed, the contact section of the switch closes, and even if the force pressing the push button is removed, the contact section remains closed. This state is maintained until the push button is pressed down again, and is also called an alternating action.

[Problems to be Solved by the Invention] However, a momentary action push button switch and an alternate action push button switch have different structures. Separately manufacturing and managing push button switches for each operating mode not only complicates inventory management, but also increases manufacturing costs as the number of each component manufactured decreases. It is a disadvantage. Furthermore, if you want to change the operating mode of a pushbutton switch that is already installed in electronic and electrical equipment, there is no other way than to replace the pushbutton switch, which requires work such as removing the wiring from the circuit inside the equipment. This is complicated, and there are also problems in terms of equipment maintenance.

This invention was devised in view of the above points,
By creating a structure that allows easy switching between the two operation modes of momentary operation and alternate operation, the number of inventory types can be halved, making it easier to manage, and the mass production effect reduces manufacturing costs. Another object of the present invention is to provide a push button switch that allows easy maintenance of electronic and electrical equipment.

[Means for solving the problem] As a result of various studies to achieve the above-mentioned purpose, it has been found that by making the seesaw cam and lever rotatable, alternate operations can be performed, and at the same time, the lever can be forcibly fixed. The present invention has been completed by providing a structure that allows momentary operation by providing means. Therefore, in the present invention, a push button and a plunger that cooperates with the push button are disposed on the upper part of the switch cover, a switch section is disposed on the lower part of the switch cover, and the middle part of the switch cover is pressed by the plunger. a seesaw cam that opens and closes the switch portion by rotating around a support provided at the cam; and a seesaw cam that is rotatable around a fulcrum provided at one end;
A lever formed by a tension spring stretched between a spring locking point provided at the other end and a spring locking point provided at one end of the seesaw cam is pivotally supported, and further, rotation of the seesaw cam and the lever is provided. A rotation limiter is provided to limit the range, and the fulcrum of the seesaw cam is set between the bottom dead center of the rotation range at the spring locking point of the lever and the top of the rotation range at the spring locking point of the seesaw cam. The fulcrum of the seesaw cam is located above the straight line connecting the dead center, and the fulcrum of the seesaw cam is also connected to the straight line connecting the fulcrum of the lever and the top dead center of the lever's rotation range at the spring locking point of the lever. Arranged within the rotation range of the lever between the fulcrum and the straight line connecting the bottom dead center of the rotation range at the spring locking point of the lever,
In addition, the fulcrum of the lever is connected to a straight line connecting the fulcrum of the seesaw cam and the top dead center of the rotation range at the spring locking point of the seesaw cam, and the rotation range between the fulcrum of the seesaw cam and the spring locking point of the seesaw cam. The lever is disposed within the rotational range of the seesaw cam between the straight line connecting the lever to the bottom dead center of the lever, and a fixing member for fixing the lever to the bottom dead center of the rotational range is detachably provided. The gist of this article is a push-button switch that is characterized by:

[Example] Hereinafter, an example of the present invention will be described based on the drawings. FIG. 1 is an exploded perspective view of a push button switch according to an embodiment of the present invention, and FIGS. 2 and 3 are schematic cross-sectional views. In the figure, a push button switch 1 houses a plunger 3, a switch portion 4, a seesaw cam 5, a lever 6, etc. in a switch cover 2.

A plunger storage part 7 is formed in the upper part of the switch cover 2, and the tip thereof is shaped like a V-shape inside.
A plunger 3 formed in a letter shape, a push button 8, and a compression coil spring 9 for urging the push button 8 upward are arranged.

The compression coil spring 9 has its lower end inserted into a stepped portion 7b around a through hole 7a formed in the approximate center of the bottom of the plunger housing 7, and its upper end slides the plunger 3 into the recess 9a on the bottom of the push button 9. The push button 9 is movably pressed and urged upward.

Further, a switch part 4 consisting of a micro switch having a button 4a is supported and fixed on a switch support 10 at the lower part of the switch cover 2, and furthermore, a middle part of the switch cover 2, that is, a plunger storage part 7 and a switch part A seesaw cam 4 for pressing the button 4a of the switch section 4, and a lever 6 for driving the seesaw cam 5 by a tension coil spring 11 are arranged between the two.

The seesaw cam 5 has supports 5a protruding from both sides of the midway portion in the longitudinal direction, and this fulcrum 5a rotates into an engagement hole 2a formed on a plane containing the push shaft of the push button 8 in the switch cover 2. A mountain portion 5b is movably supported and has an apex midway in the longitudinal direction of the upper surface thereof, and trough portions 5a are formed on both sides of the mountain portion 5b, that is, on both sides of the fulcrum 5a.
Furthermore, a spring locking point 5d is formed at the left end in FIG.

On the other hand, the lever 6 has fulcrums 6 on both sides of its left end.
a is provided protrudingly, and this fulcrum 6a is rotatably supported with respect to an engagement hole 2b formed on a horizontal plane including the fulcrum 5a of the seesaw cam 5 in the switch cover 2, and a spring is provided at the right end of the engagement hole 2b. A locking point 6a is formed, and a tension coil spring 11 is tensioned between this spring locking point 6a and a spring locking point 5d of the seesaw cam 5.

Further, the bottom surface of the plunger storage portion 7 of the switch cover 2 is used as a rotation restriction portion 12 for determining the top dead center of the rotation range of the seesaw cam 5 and the lever 6, and the top surface of the switch portion 4 is used as a rotation restriction portion 12 for determining the top dead center of the rotation range of the seesaw cam 5 and the lever 6. Rotation limiting part 13 for determining the bottom dead center of the rotation range of
It is said that

Reference numeral 2c denotes a through hole bored in the switch cover 2 on the right end side of the lever 6. A lever fixing member 14 consisting of a press-fit pin is removably attached to the through hole 2c, and the lever 6 is rotated. By inserting the lever fixing member 14 while the lever is positioned at the bottom dead center of the range, the lever 6 is fixed at the bottom dead center.

Furthermore, 5e is a pressing piece provided at the lower left end of the seesaw cam 5, and when the pressing piece 5e reaches the bottom dead center due to rotation of the seesaw cam 5,
It contacts the button 4a protruding from the upper surface of the switch section 4 and closes the contact within the switch section 4 by pressing this.

The fulcrum 5a of the seesaw cam 5 is a straight line connecting the fulcrum 6a of the lever 6 and the top dead center of the rotation range at the spring locking point 6b of the lever 6, and the fulcrum 6a of the lever 6 and the spring locking point 6b of the lever 6. It is arranged within the rotation range of the lever 6 between the point 6b and the bottom dead center of the rotation range, and the fulcrum 6a of the lever 6
is the fulcrum 5a of the seesaw cam 5 and the seesaw cam 5.
A straight line connecting the top dead center of the rotation range at the spring locking point 5d, and a straight line connecting the fulcrum 5a of the seesaw cam 5 and the bottom dead center of the rotation range at the spring locking point 5d of the seesaw cam 5. The fulcrum 5 of the seesaw cam 5 is arranged in between and within the rotation range of the seesaw cam 5.
a is located above the straight line connecting the bottom dead center of the rotation range at the spring locking point 6b of the lever 6 and the top dead center of the rotation range at the spring locking point 5d of the seesaw cam 5, Seesaw cam 5 and lever 6
dimensions, positions of fulcrums 5a and 6a, spring locking point 5
The positions of d and 6b and the arrangement of rotation restricting parts 12 and 13 are adjusted.

FIG. 4 is an exploded perspective view of the switch cover 2 housed in the switch case 15 in the above-mentioned embodiment. It is set up. In addition, the lever fixing member 14 is not limited to a press-fit pin, and for example, a concave or convex portion may be formed in a base provided at one end of the pin, and the end thereof may be bent approximately 90 degrees to form an L-shape. forming a bend,
It is also suitable that the bent portion is inserted from above or below the switch case 15 to form the lever fixing member 14. In this case, by rotating the pin from above or below the switch case 15, the bent portion can be inserted from above or below the switch case 15. is attached to and detached from the switch cover 2 to fix or release the lever 6.

[Function] However, when the push button switch 1 of the present invention is operated in an alternate manner, the lever fixing member 14 is removed from the through hole 2c of the switch cover 2, and the second
As shown in Figure A, the right end of the seesaw cam 5 comes into contact with the rotation limiter 12 on the bottom of the plunger housing 7 and is located at the top dead center of the rotation range, and the left end is located at the bottom dead center of the rotation range. Then, the pressing piece 5e of the seesaw cam 5 presses the button 4a of the switch part 4, and the right end of the lever 6 touches the rotation restriction part 1 on the upper surface of the switch part 4.
3 and is located at the bottom dead center of the rotation range.

In this state, when the push button 8 is pressed down, the plunger 3 works together with the push button 8 to release the compression coil spring 9.
The plunger 3 moves downward against the bias of the plunger 3.
The tip of the seesaw cam 5 contacts the left and right slopes of the peak 5b, and further slides down the slope to reach the right trough 5c of the seesaw cam 5, resisting the tension of the tension coil spring 11. Then, the seesaw cam 5 is rotated clockwise around its fulcrum 5a, and the spring locking point 5d of the seesaw cam 5 is moved upward.

As shown in FIG. 2B, the straight line connecting the center line of the tension coil spring 11, that is, the bottom dead center of the rotation range at the spring locking point 6b of the lever 6 and the spring locking point 5d of the seesaw cam 5, 6 fulcrum 6a
At the moment when the lever 6 crosses from bottom to top a straight line connecting the bottom dead center of the rotation range at the spring locking point 6b, the lever 6 is moved to its fulcrum 6a by the tension of the tension coil spring 11.
The spring locking point 6 rotates counterclockwise around the
b moves upward rapidly.

In the process of these spring locking points 5d and 6b moving upward, the spring locking point 6b of the lever 6 and the spring locking point 5 of the seesaw cam 5 are
At the moment when the straight line connecting d crosses the straight line connecting the fulcrum 5a of the seesaw cam 5 and the spring locking point 5d from bottom to top, the tension coil spring 11 is attached to the seesaw cam 5.
Since a clockwise moment acts due to
rotates clockwise around its fulcrum 5a, and the third
As shown in Figure D, its left end abuts against the rotation limiting portion 12 on the bottom surface of the plunger housing 7, reaches the top dead center of the rotation range, and is held in this state.

As a result, the button 4a of the switch section 4 is released from the pressure of the pressing piece 5e of the seesaw cam 5, and the contacts in the switch section 4 are opened. Further, the lever 6 continues to rotate counterclockwise, and its right end abuts against the rotation limiter 12 and is held at the top dead center of the rotation range.

Furthermore, if push button 8 is pressed again in the above state,
The tip of the plunger 3 descends together with the push button 8 and presses the left trough 5c of the seesaw cam 5, rotating the seesaw cam 5 counterclockwise around its fulcrum 5a against the tension of the tension coil spring 11. As a result, the spring locking point 5d of the seesaw cam 5 moves downward.

As shown in FIG. 2E, a straight line connecting the top dead center of the rotation range at the spring locking point 6b of the lever 6 and the spring locking point 5d of the seesaw cam 5 connects the fulcrum 6a of the lever 6 and the spring locking point 5d. At the moment when the lever 6 crosses from top to bottom a straight line connecting the top dead center of the rotation range at the stop point 6b, the lever 6 rotates clockwise around its fulcrum 6a due to the tension of the tension coil spring 11. The spring locking point 6b suddenly moves downward.

In the process of these spring locking points 5d and 6b moving downward, as shown in FIG.
When the straight line connecting points b crosses the straight line connecting the fulcrum 5a of the seesaw cam 5 and the spring locking point 5d from top to bottom, a counterclockwise moment is applied to the seesaw cam 5 by the tension coil spring 11. Even if the press of the push button 8 is stopped, the seesaw cam 5 rotates counterclockwise around its fulcrum 5a, first returning to the original state shown in FIG. 2A, and performing a series of alternate operations. complete. In addition, Fig. 2B,
In C, E, and F, illustration of the tension coil spring 11 is omitted.

On the other hand, when the push button switch 1 of the present invention is momentarily operated, the right end of the seesaw cam 5 comes into contact with the rotation limiter 12 and is located at the top dead center of the rotation range, as shown in FIG. The left end is located at the bottom dead center of the rotation range, and the pressing piece 5e is pressed against the button 4a of the switch section 4.
is pressed, and the right end of the lever 6 touches the rotation limiter 13.
In the state where the lever is in contact with and positioned at the bottom dead center of the rotation range, the lever fixing member 14 is inserted into the through hole 2c of the switch cover 2 to fix the right end of the lever 6.

When the push button 8 is pressed in this state, the plunger 3 presses the right trough 5c of the seesaw cam 5,
The seesaw cam 5 is rotated clockwise around its fulcrum 5a. Then, the spring locking point 5d of the seesaw cam 5 moves upward, and the tension coil spring 11
(not shown), that is, the straight line connecting the bottom dead center of the rotation range at the spring locking point 6b of the lever 6 and the spring locking point 5d of the seesaw cam 5 is the center line of the spring locking point 6b of the lever 6. Although the lever 6 crosses the straight line connecting the bottom dead center of the rotation range at the point 6b from bottom to top, the lever 6 does not move because its right end is fixed by the lever fixing member 14 as described above. The lever 6 further rotates when the push button 8 is pressed, and as shown in FIG. The button 4a of the section 4 is a pressing piece 5
The pressure of e is released, and the contacts in the switch section 4 are opened.

In this state, the fulcrum 5a of the seesaw cam 5
is always located above the straight line connecting the bottom dead center of the rotation range at the spring locking point 6b of the lever 6 and the spring locking point 5d of the seesaw cam 5. coil spring 11
Therefore, when the push button 8 is stopped being pressed, the seesaw cam 5
performs a momentary operation in which it instantaneously reverses and returns to the original state shown in FIG. 3A.

[Effects of the invention] As described above, according to the push button switch of the present invention, by making the seesaw cam and lever rotatable, alternate operations can be performed, and the switch can be easily attached and detached by simply attaching and detaching the lever fixing member. Since the momentary operation can be performed by forcibly fixing the rotation of the lever with a simple operation, the operating mode of the push button switch can be extremely easily switched between the two operating modes, momentary and alternate. This eliminates the need to manufacture and manage momentary push-button switches and alternate push-button switches separately, which halves the number of inventory types and makes it easier to manage them.Moreover, the mass production effect makes it possible to manufacture them at low cost. It has various practical values, such as being able to change its operating mode even when attached to electronic and electrical equipment, making maintenance easier.

[Brief explanation of the drawing]

1 to 4 show a push button switch according to an embodiment of the present invention, FIG. 1 is an exploded perspective view, and FIGS. 2 A to F are schematic cross-sections for explaining the alternate operation. Figures 3A and 3B are schematic cross-sectional views for explaining momentary operation;
The figure is an exploded perspective view showing an example of a lever fixing member. 1...Push button switch, 2...Switch cover,
3...Plunger, 4...Switch part, 5...
Seesaw cam, 5a... fulcrum, 5d... spring locking point, 6... lever, 6a... fulcrum, 6b... spring locking point, 8... push button, 11... tension coil spring,
12, 13...Rotation limiting part, 14...Lever fixing member.

Claims (1)

[Scope of utility model registration request] A push button and a plunger that cooperates with the push button are arranged on the upper part of the switch cover, and a switch part is arranged on the lower part of the switch cover. A seesaw cam that rotates around to open and close the switch part, a spring locking point that is rotatable around a fulcrum provided at one end, a spring locking point provided at the other end, and a spring provided at one end of the seesaw cam. a lever formed by tensioning a tension spring between the locking point and the lever, further provided with a rotation limiter for limiting the rotation range of the seesaw cam and the lever, and a fulcrum of the seesaw cam. is located above the straight line connecting the bottom dead center of the rotation range at the spring locking point of the lever and the top dead center of the rotation range at the spring locking point of the seesaw cam, and also A straight line connecting the fulcrum of the lever and the top dead center of the rotation range at the spring locking point of the lever, and a straight line connecting the fulcrum of the lever and the bottom dead center of the rotation range of the lever at the spring locking point. The fulcrum of the lever is placed within the rotation range of the lever between the straight line and the straight line connecting the fulcrum of the seesaw cam and the top dead center of the rotation range at the spring locking point of the seesaw cam. The lever is placed within the rotation range of the seesaw cam between the straight line connecting the fulcrum of the cam and the bottom dead center of the rotation range at the spring locking point of the seesaw cam, and the lever is placed within the rotation range of the seesaw cam. A push button switch characterized by a fixing member for fixing to a point being detachably arranged.