JPS60734B2 - push button switch - Google Patents

Description

[Detailed description of the invention] The present invention relates to pushbutton switches.

Conventionally, for example, as a pushbutton switch for an elevator, as shown in FIG.
A button 3 is inserted and supported in the support frame 2, and the operator 5 connected to the button 3 is guided to the switch 4 side by a guide 7 containing a coil spring 6 for return, and the button 3 is pressed. There is a push button switch in which the switch 4 is actuated via the contact 9.

The guide 7 is fixed to the surface plate 1 with screws 8, and the operator 5
is slid on the inner surface of this guide 7 to constitute a push button mechanism. Furthermore, “the switch 4 with the exposed contact point 9 is
The mounting plate 10' is fixed with screws 11, and the mounting plate 101 and adjustment fittings 12 are provided. Furthermore, the stroke of the push button mechanism is adjusted by means of an adjustment screw 15 that engages with a stud 14 attached to a box 13 fixed separately from the surface plate 1. In addition, there are cases where a single button requires switching between two electrical circuits, such as an emergency call button switch installed on the operation panel inside the elevator car used in emergencies, such as intercom calls and operation of the emergency bell of the elevator Hataba. .

FIG. 2 shows a configuration in which two one-circuit microswitches 16 are fastened to the mounting plate 17 with screws 18, and fixed to the mounting plate 101 in the same manner as described above to form a two-circuit switch. The conventional pushbutton switch shown in FIGS. 1 and 2 has a large number of parts due to the pushbutton mechanism, switch mechanism, and their combination, making assembly and adjustment time-consuming and expensive. Moreover, since the contacts of the switch 4 are exposed, it is easy to cause contact failure due to dust, and malfunction due to insufficient stroke adjustment, such as the switch not turning on or off, or the stroke being too large.
When the end of the button 3 is pressed, there have been various problems such as the button 3 tending to become attached to the button 3. The present invention has been made in view of the above-mentioned problems, and is a push button switch that has a small number of parts, is easy to assemble and adjust, and is inexpensive, can easily configure a two-circuit switch, and is dust-proof. The purpose is to provide Hereinafter, one embodiment of the present invention will be described with reference to FIGS. 3 to 7.

A surface plate 21 inserted and fixed into the face plate 19 is made of resin and has a square hole 21 into which a button 23 is inserted and a groove 22 which determines the amount of protrusion of the button 23.

The button 23 is also made of resin, and the micro switch 27,
It has a groove 26 to which the operation pins 29 and 30 of 28 are joined, and a protrusion 25 that slides and is guided between the side surfaces 31 and 32 of the microswitches 27 and 28. Micro switch 27
, 28 are for one circuit having an outer periphery molded with resin and have a dust-proof structure, and two of these are fixed to a mounting plate 35 made of sheet metal with screws 36. Note that the protrusion 25 of the button 23 is inserted between the side surfaces 31 and 32 of the microswitches 27 and 28, and a predetermined gap is formed so that the button 23 can be slid. In addition, the mounting plate 35 is fixed in the groove of the face plate 19 with screws 37, and the operation pins 29, 30 of the micro switches 27, 28 are fixed.
is given a force to push the button 23 upward. and,
The spring force of the microswitches 27 and 28 ensures that the button 23 always returns to its initial position. The operation of the push button switch of the present invention configured as described above is performed as follows. That is, when the button 23 is pressed with a finger, the protrusion 25 engages the groove 22 of the surface plate 20 and the microswitch 27.
, 28 along the side surfaces 31, 32 of. As a result, the operation pins 29 and 30 of the microswitches 27 and 28 that align with the groove 261 of the button 23 are pressed, and the two microswitches 27 and 28 operate simultaneously. Note that the button 23 is connected to the upper surfaces 33 and 3 of the microswitches 27 and 28.
4 as a stopper. (The stroke is determined by this dimension.) Next, when you release your finger from button 23, the microphone is activated.

Since the spring force of the switches 27 and 28 is always working, the button 23 returns to its original position due to the spring force.
Also, since the spring force is still working when the button returns, the button 23
No rattling occurs. As an outline of the operation, the case where the center of the button 23 is pressed has been described above, but when the end of the button 23 is pressed, the button 23 tilts as shown in FIG.

However, in the pushbutton switch of the present invention, the groove 22 of the surface plate 20 that guides the protrusion 24 of the button 23 in the operating direction is longer than the outer shape of the button. Side surface 3 of switches 27 and 28
It is separated from 1 and 32. Therefore, since the fulcrum is far away in the operating direction from the point where the button 23 is operated with a finger, the forehead (amount 8) is only a small amount, and the button 2
It is difficult to cause the deviation of 3. Also, the micro switch 27, 2
Since the operation pins 29 and 30 of 8 are located almost directly below the operation position of the button 23, the amount of rotation is small, and the two microswitches 27 and 28 operate almost simultaneously. In addition,
Although a two-circuit pushbutton switch has been described in the above embodiment, the present invention is not limited to such a switch, but is applicable to a switch with one microswitch 28 shown in FIG.
As shown in the figure, the present invention can also be applied to a single-circuit pushbutton switch.

In this case, when the left side of the button 23 is pressed, the same operation can be obtained with the same degree of comfort as the two-circuit type. Furthermore, even when pressing the right side of the button 23, the operating pin 29 of the microswitch 27 is located almost directly below the operating position of the button 3, so the bending moment acting on the button 23 is small, and the neck 82 hardly occurs. It works (see the state in Figure 8). Further, in the above embodiment, the surface plate 20 is made of a resin molded product and has the grooves 22, but the present invention is not limited to such a structure. For example, as shown in FIGS. 38 is a single plate (for example, a stainless steel plate, etc.) with only a square hole 39, a stud 40 is provided on the surface plate 38, and a mounting plate 41 is fixed, and the rest is configured similarly to the previous embodiment. However, since the button has the protrusion 25, reliable operation can be obtained.

Note that the projection 25 of the button 23 is guided by a mounting plate 41 instead of the microswitch 28, as shown in FIG.
Even if the collar 42 is screwed to the collar 42, the operation can be performed reliably. As described above, the pushbutton switch of the present invention requires fewer parts such as buttons, microswitches, mounting plates, etc., has a simple structure, and requires almost no effort to assemble and adjust. It can be produced at low cost.

In addition, compared to the outer shape of the button, the distance between the operating point and the fulcrum is larger in the operating direction, so the button is less cumbersome.
Buttons are less likely to shift, and switching operations are reliable. Furthermore, since the bottom of the button is provided with a groove, there is no need to overpress the microswitch, and since the button is placed against the top surface of the microswitch, it is strong against impact forces. In addition, in the case of a structure in which the buttons and switches are mounted on the front plate side, assembly and adjustment are easier and stable strokes can be obtained.

In addition to easily obtaining single-circuit and dual-circuit pushbutton switches, commercially available inexpensive dust-proof microswitches can also be used, preventing switch contact failures caused by dust, and requiring less maintenance and inspection. A simple and economical push button switch for elevators, etc. can be obtained.

[Brief explanation of drawings]

FIG. 1 is a sectional view showing a conventional example, FIG. 2 is a partial sectional view showing a different subordinate example, FIGS. 3 to 7 show an embodiment of the present invention, and FIG. 4 is a sectional view taken along line W-W in FIG. 3; FIG. 5 is a sectional view taken along line V-V in FIG.
FIG. 6 is a perspective view showing the button, FIG. 7 is an enlarged sectional view for explaining the operation, FIG. 8 is a sectional view showing another embodiment of the present invention, and FIG. 9 is a further embodiment of the present invention. Cross-sectional view shown, No. 10
The figure is a sectional view taken along the line X--X of FIG. 9, and FIG. 11 is a sectional view showing another embodiment of the present invention. 20...Top plate, 22...Groove, 23...Button, 24, 25...Protrusion, 26...Groove 2
7, 28... Micro switch, 29, 30...
...Operation pin, 31, 32...Switch side, 3
5, 41...Mounting plate, 38...Surface plate. Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 Figure 6 Figure 7 Figure 8 Figure 9 Figure 10 Figure 11

Claims (1)

[Claims] 1. In a push button switch that operates by pressing a button provided on a top plate, a protrusion that contacts the top plate is provided on the side of the operation button to prevent the button from coming off, and a projection on the bottom of the button is provided on the bottom of the button. A protrusion that slides while being guided by the side surface of the microswitch that is attached to the mounting plate provided inwardly is provided, and a groove into which the operating pin of the microswitch is fitted, and the operating pin of the microswitch is moved by the spring force to the button. A push-button switch, characterized in that it provides a return force to the switch.