JP4137216B2 - Locking switch device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a lock-type switch device in which an operation knob that is pressed and held is moved back to its original position by pressing again.
[0002]
[Prior art]
When the operation knob is pressed, the lock pin that moves elastically in contact with the one-way circulation path is held in engagement with the engagement recess of the heart-shaped cam. By pressing the operation knob again, the lock pin is engaged with the engagement recess. Some lock-type switch devices in which the operation knob is returned to the original position by returning to the one-way circulation path from one to the other have a lock pin formed on the lock spring. When the lock spring is pressed, the lock pin is bent and the lock pin bends to elastically contact the road surface of the one-way circulation path, thereby establishing the lock function. As shown in FIG. 4, the lock spring b attached to the attachment part a is unstable and rises above the assembly surface e with the counterpart part c so that the lock pin d is bent by being pressed by the counterpart part c to be attached. It is attached in the state.
[0003]
[Problems to be solved by the invention]
If the degree of protrusion of the lock spring b with respect to the assembly surface e with the mating part c is large, it is necessary to carefully assemble the mating part c while pressing down the lock spring b, resulting in inefficient assembly work and high cost. Yes. The present invention has been made in view of the above, and an object of the present invention is to provide a lock type switch device in which the projecting degree of the coil portion of the lock spring is reduced to improve the assembly workability.
[0004]
[Means for Solving the Problems]
In order to achieve the above object, the lock type switch device of the present invention has a lock spring attached to a switch body assembled in a switch case , a heart-shaped cam on the upper surface , and the lock spring formed around the heart-shaped cam. a slider locking pin is provided with one-way circulation path elastically contacting that, an operation knob which is integrally shaped by structural fit with the slider, with incorporated slidably in the switch body, and presses the operation knob The heart-shaped cam and the lock spring are moved relative to each other, and a lock pin that moves in the one-way circulation path is engaged with an engagement recess of the heart-shaped cam to hold the operation knob. By pressing again, the lock pin is returned from the engagement recess to the one-way circulation path, the operation knob is returned to the original position, and the switch In the locked switch device for turning on and off the upper surface of the slider, the side portions to the depth of the deepest portion of the one-way circulation path deeper than the one-way circulation path, toward the deepest portion from the edge the An insertion recess provided with an inclined surface parallel to the sliding direction of the operation knob, a guide wall surface is formed in the vicinity of the edge portion of the insertion recess, and the lock pin is inserted into the deepest portion of the insertion recess. A lock spring is attached, and the lock pin that rises up the inclined surface of the insertion recess by the pressing operation of the operation knob after installation is guided to the one-way circulation path by the guide wall surface. It is characterized by that.
[0005]
[Action and effect of the invention]
According to the lock type switch device described above, the lock spring attached to the switch body is assembled before the switch body in which the slider and the operation knob integrated by the fitting structure are slidably assembled to the switch case . The lock pin is inserted into the deepest portion of the insertion recess formed in the side portion of the one-way circulation path provided on the upper surface of the slider . And since the insertion recess is provided with an inclined surface parallel to the sliding direction of the operation knob from the edge toward the deepest part deeper than the one-way circulation path, the operation knob after the switch body is assembled to the switch case When the is pressed, the heart-shaped cam and the lock spring move relative to each other, and the lock pin escapes the inclined surface from the upward fitting recess. And it guides to the guide wall surface formed in the vicinity of the edge part of this insertion recessed part, and approachs to a one-way circulation path. Since the deepest part of the insertion recess is formed deeper than the one-way circulation path, the mounting position of the lock spring is lowered, and the degree of protrusion of the lock spring with respect to the assembly surface with the mating part can be reduced. Therefore, it is not necessary to press down the lock spring when assembling the counterpart part, and the efficiency of the assembling work can be improved. Further, the lock pin fitted and attached in the deepest part of the insertion recess is lifted up the inclined surface of the insertion recess by the pressing operation of the operation knob after the switch body is assembled to the switch case and guided. Since it is guided by the wall surface and automatically enters the one-way circulation path, there is no need to artificially return the lock pin to the one-way circulation path, and the efficiency of the assembling work of the lock type switch device can be further increased.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
An embodiment of a locking switch device (hereinafter simply referred to as a switch device) 1 of the present invention will be described with reference to the accompanying drawings. 1 is a cut-away plan view of the main part of the switch device 1, FIG. 2 is a cross-sectional view taken along line AA in FIG. 1, and FIG. An operation knob 3 is slidably incorporated in the switch body 2. A slider 4 is connected to the operation knob 3 by a fitting structure so as to slide integrally. A heart-shaped cam 6 is formed on the upper surface 5 of the slider 4. The switch body 2 is provided with a mounting shaft portion 7 for the lock spring 8.
[0007]
Each coil end of the coil portion 9 of the lock spring 8 is extended in the tangential direction, and a lock pin portion 10 extended from the lower coil end and a latch pin portion 11 extended from the upper coil end are formed. Yes. The lock pin portion 10 is formed with a lock pin 10a whose tip is bent downward at a substantially right angle. Further, a bent portion 11a is formed by bending the front end of the latch pin portion 11 downward substantially at a right angle.
[0008]
A one-way circulation path 12 is formed on the outer periphery of the heart-shaped cam 6 and is provided with a blocking step so that the lock pin 10a does not rotate in a reverse direction. The one-way circulation path 12 includes an outward path 13 that goes in the clockwise direction toward the engaging recess 6a of the heart-shaped cam 6, and a return path 14 that returns from the engaging recess 6a in the clockwise direction. In addition, an insertion recess 15 of the lock pin 10 a is formed on the side of the forward path 13 on the upper surface 5 of the slider 4. As shown in FIG. 2, the deepest portion 15b of the insertion recess 15 is formed deeper than the one-way circulation path 12, and an inclined surface 16 from the edge portion 15a toward the deepest portion 15b at the center is formed in FIGS. As shown in FIG. 3, the operation knob 3 is formed in parallel with the sliding direction. Further, on the upper surface 5 of the slider 4, a guide wall surface 17 for guiding the lock pin 10 a that has moved up the inclined surface 16 and escaped from the insertion recess 15 to the forward path 13, as shown in FIGS. 2 and 3, It is formed in the vicinity of 15a.
[0009]
As shown in FIG. 2, the lock spring 8 is attached by fitting a coil portion 9 to an attachment shaft portion 7 of the switch body 2. The latching pin portion 11 extending from above the coil portion 9 is in contact with the latching wall portion 2a of the switch body 2 at the tip of a bent portion 11a bent downward. The lock pin 10 a at the tip of the lock pin portion 10 that expands due to the torsional elasticity of the coil portion 9 is fitted into the deepest portion 15 b of the fitting recess 15 formed deeper than the one-way circulation path 12. Since the lock pin 10a is inserted into the deepest portion 15b of the insertion recess 15, the coil portion 9 of the lock spring 8 is fitted to the lower end of the attachment shaft portion 7 and attached in a stable state, and the attachment position is lowered and lowered. Become. For this reason, only the latch pin portion 11 at the upper end of the coil portion 9 protrudes from the upper surface of the switch body 2.
[0010]
The switch body 2 to which the operation knob 3 and the slider 4 integrated by the fitting structure are attached and the lock spring 8 is attached as described above is inserted into the switch case 18 and assembled. A guide slope 20 that retreats in the loading direction is formed at the loading port 19 of the switch case 18. As the switch body 2 is inserted into the switch case 18, the bent portion 11 a of the latching pin portion 11 protruding from the upper surface of the switch body 2 is pressed down against the guide slope 20, and the coil portion of the lock spring 8 is pushed down. 9 is pushed into the switch body 2. The lock pin 10a inserted into the deepest part 15b of the insertion recess 15 is lifted up from the insertion recess 15 by moving up the inclined surface 16 by pushing the operation knob 3 after the switch body 2 is assembled to the switch case 18. It is guided by the wall surface 17 and enters the forward path 13 of the one-way circulation path 12.
[0011]
As described above, the protrusion of the coil portion 9 of the lock spring 8 with respect to the assembly surface with the switch case 18 can be reduced by fitting the lock pin 10a whose tip is bent at a substantially right angle into the fitting recess 15. Furthermore, since the guide slope 20 is formed at the loading port 19 of the switch case 18, it is not necessary to press down the lock spring 8, and it can be loaded and assembled as it is, and the efficiency of the assembling work can be improved. Furthermore, the lock pin 10a fitted and attached to the deepest portion 15b of the fitting recess 15 rises up the inclined surface 16 of the fitting recess 15 and escapes from the fitting recess 15 by the pressing operation of the operation knob 3 after being attached. Since it is guided by the guide wall surface 17 and automatically enters the one-way circuit 12, there is no need to manually return the lock pin 10 a to the one-way circuit 12, and the assembly work of the lock-type switch device is more efficient. Can be increased.
[0012]
The operation of the switch device 1 is as follows. When the operation knob 3 is pressed from the original position, the lock pin 10 a advances along the forward path 13 of the one-way circulation path 12. When the pressing is released at the pressing position, the operation knob 3 tries to return to the original position by the urging force of the return spring 21 applied to the slider 4, but the lock pin 10a is engaged with the engaging recess 6a, so that the operation knob 3 is operated. The knob 3 is held in a pressed state. At this time, a switch (not shown) provided in the switch device 1 is turned on. When the operation knob 3 is pressed again from this state, the lock pin 10a released from the engagement recess 6a enters the return path 14 of the one-way circulation path 12, so that the operation knob 3 returns to the original position and the switch is Turn off.
[Brief description of the drawings]
FIG. 1 is a cut-out plan view of a main part of a switch device 1. FIG.
FIG. 2 is a cross-sectional view taken along line AA in FIG.
FIG. 3 is a plan view of a heart-shaped cam 6;
FIG. 4 is a cross-sectional view showing a conventional example.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Switch apparatus 2 ... Switch body 3 ... Operation knob 4 ... Slider 6 ... Heart-shaped cam 6a ... Engagement recessed part 8 ... Lock spring 10 ... Lock pin part DESCRIPTION OF SYMBOLS 10a ... Lock pin 12 ... Unidirectional circulation path 13 ... Outward path 14 ... Return path 15 ... Insertion recessed part 15a ... Edge 15b ... Deepest part 16 ... Inclined surface 17. .. Guide wall 18 ... Switch case

Claims (1)

A slider provided with a lock spring attached to a switch body assembled to the switch case, a heart-shaped cam on the upper surface, and a one-way circulation path around which the lock pin formed on the lock spring is elastically contacted; and an operation knob that is integrally shaped by structural fit with the slider, with incorporated slidably in said switch body causes relative movement of said heart-shaped cam and the lock spring presses the operation knob, the one The lock pin that moves in the direction circulation path is engaged with the engagement recess of the heart-shaped cam to hold the operation knob, and by pressing the operation knob again, the lock pin is moved in one direction from the engagement recess. In the lock type switch device that returns to the circulation path and returns the operation knob to the original position to turn the switch on and off,
On the upper surface of the slider, the depth of the deepest part at the side of the one-way circulation path is deeper than the one-way circulation path, and the inclination is parallel to the sliding direction of the operation knob from the edge toward the deepest part. An insertion recess provided with a surface and a guide wall surface in the vicinity of the edge of the insertion recess, the lock pin is inserted into the deepest part of the insertion recess, and the lock spring is attached, A locking switch device characterized in that the lock pin that rises up the inclined surface of the insertion recess by pressing operation knob and escapes from the insertion recess is guided to the one-way circulation path by the guide wall surface. .

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