JP3141066B2 - Push button switch device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a push-button switch device, and more particularly to a push-button switch device suitable for a device incorporating a large number of push-button switch devices such as a pendant switch.

[0002]

2. Description of the Related Art FIG. 7 shows an electric circuit of a two-stage push button switch device for inverter control generally used for a pendant switch. The push button switch device 100 includes a switch unit 10.
1 and an output unit 102, and the switch unit 101 includes two push-button switches PBa and PBb. The push button switch PBa is a first-stage switch 103, a second-stage switch 104
And the push button switch PBb is the first stage switch 10
5. The second stage switch 106 is provided. In the figure, it is assumed that the second-stage switch of the two push-button switches emits the same signal.
An example in which the transmission line a1 is connected to the transmission line a1 is shown.

As a result, the three types of signals emitted from the switch unit 101 are transmitted separately from the transmission lines a1, a2, a
3 is connected to the output unit 102.
Each of the transmission lines is provided with detection members 107, 108, and 109, for example, such as photocouplers, and is activated by a signal from a switch unit to emit an activation signal. That is, three transmission lines a1, a2, and a3 are required to transmit three types of signals. For this reason, for example, in a device in which many pushbutton switch devices are incorporated in one operating device such as a pendant switch for operating a crane and a hoist, wiring of at least three times the pushbutton switch device and one common line is required. is there.

[0004]

On the other hand, in this case, when the individual switches are further multi-staged, not only the number of wirings but also the number of contacts increases, and the pushbutton switch device becomes large. there were. The present invention has been made in view of the above problems, and an object of the present invention is to provide a push button switch device in which the number of contacts is reduced and the shape is reduced.

[0005]

In order to achieve the above object, a push button switch device of the present invention is inserted into a long groove of a housing of the push button switch device and is inserted into a long groove by a coil spring in a downward direction of the groove.
It has a contactor is energized, and disposed between the housing coil
And two push buttons that will be energized by a spring, the elongated groove between the press button
Have a contact <br/> probe is biased in the groove under the direction by the inserted coil spring within, with the disposed the coil spring between the housing
Fitted an intermediate switch for multi that will be energized by manipulating pushed down against the biasing force of either coil spring to one of the push button, a projection which projects towards the respective push button in intermediate switches for multistage The multi-stage intermediate switch is pressed down against the biasing force of the coil spring .

[0006]

This push button switch device is configured to push down one of the push buttons to push down an intermediate switch for multiple stages through a projection provided on the push button.
The two push buttons share the contact of the intermediate switch for multi-stage and the contact for the same.

[0007]

1 and 3 show a comparative example of a push button switch device. The switch unit 31 of the push-button switch device 30 of this comparative example is a pair of three-stage push-button switches PB5 and PB5.
B6 and three diodes D1, D2, D3.
The first contacts 33, 36 of the push button switches PB5, PB6 are provided with normally closed contacts 33b, 36b. The first contact 33 of the first push-button switch PB5 is connected in series with the diode D1 in the positive direction.
The first contact 36 connects the diode D2 in series in the reverse direction, and the first contacts 33 and 36 are connected to the output unit 32 via a common first transmission line S6. The diode D3 is connected in series in the positive direction to the second switch 37 of the second push button switch PB6, and the second and third contacts of each push button switch output via a common second transmission line S7. It is connected to the unit 32.

FIG. 2 shows the output when the push-button switch of this comparative example is closed. According to this comparative example, two transmission lines S
A total of four types of signals can be transmitted to each of S6 and S7.

FIG. 3 shows the output section 32 of this comparative example. The output section 32 is an interface circuit. A pulsating signal current of half-wave rectification in reverse direction is applied to the transmission line S6, and discrimination is made by a pair of discriminating means PC10 and PC11. A pulsating signal current of positive half-wave rectification and an alternating current are applied to the other transmission line S7, which are discriminated by two discriminating means PC12 and PC13, and the signal is integrated by a resistor and a capacitor. Comparator CR via circuit
7 to CR10 are selectively applied. That is, each of the two transmission lines S6 and S7 transmits two kinds of signals, that is, a total of four kinds of signals, and the output unit discriminates them by the discriminating means and emits an output according to the signals.

FIGS. 4 and 6 show an embodiment of the push-button switch device according to the present invention. The switch section 41 of the push button switch device 40 of the present embodiment shows an example using a three-stage push button switch. This switch section 41 has two pushbutton switches P
B7 and PB8, the first contacts 43 and 44 are closed separately, while the second and third contacts 45 and 46 are closed when any of the pushbutton switches are depressed. The contacts are shared by the push button switches PB7 and PB8 so that the number of contacts can be reduced as compared with the comparative example. A specific example is shown in FIG.

The switch section 41 includes a push button 5
1, 52 are inserted at intervals. The two push buttons have the same structure, and the following description will focus on one push button 51.

The push button 51 has a rectangular contact 54 inserted into the long groove 53, and the contact 54 is a coil spring 55
The head is also urged by the coil spring 56 in the direction in which the head protrudes from the housing 50 .
57 and 57a indicate left and right contacts. Reference numeral 58 denotes a protrusion protruding toward the other push button 52 on the push button 51 (note that the other push button 52
Also, a protrusion 58a protruding toward one push button 51 is formed. In addition, reference numeral 60 denotes a multistage intermediate switch disposed between the push buttons 51 and 52. The multistage intermediate switch 60 is urged by the coil spring 61 toward the protrusion 58 (58a). This is an intermediate switch 60 for multistage forming a length of the long groove 62, 63 by inserting a rectangular contact 64 and 65, respectively, the grooves by the coil spring 66 and 67
It is urged downward. Reference numerals 70 and 70a denote left and right contacts to the contact 64 inserted into the long groove 62, and reference numerals 71 and 71a denote contacts to the contact 65 inserted into the short groove 63.
59 and 59a are contacts 54a on the other push button 52 side.
Left and right contacts.

In the above-described structure, the contact 54 connects the contacts 57 and 57a by the first-step pressing operation of the push button 51. Further, the contact 54a connects the contacts 59, 59a by the first-step pressing operation of the push button 52. Then, when the push button 51 or the push button 52 is pushed down in the second stage, the intermediate switch 6 for multiple stages is pushed through the projections 58 and 58a.
0 is pushed down, and the contact 64 of the long groove 62 is
Connect a. By further depressing the push button 51 or the push button 52, the contact 65 in the short groove 63 contacts the contacts 71, 71.
Connect a. In this case, the contacts 57 and 57a are connected to the contact 43, the contacts 59 and 59a are connected to the contact 44, and the contact 7
0 and 70a are at contact 45, and contacts 71 and 71a are at contact 46
Is equivalent to Although a diode, which will be described later, is housed in the housing 50, illustration thereof is omitted.

The switch section 41 includes a push button switch PB
7, PB8 and three diodes D1, D2, D3, each of which is connected as shown. The output to the transmission lines S8 and S9 by this is as shown in FIG.
The output unit 42 may have a structure of the comparative example shown in FIG.

[0015]

According to the pushbutton switch device of the present invention, the number of contacts can be reduced, and the shape of the pushbutton switch device can be made compact.

[Brief description of the drawings]

FIG. 1 is an overall circuit diagram of a comparative example of a push button switch device.

FIG. 2 is an explanatory diagram of the signal current.

FIG. 3 is a circuit diagram of an output unit of a comparative example.

FIG. 4 is an overall circuit diagram of one embodiment of the push button switch device of the present invention.

FIG. 5 is an explanatory diagram of the signal current.

FIG. 6 is an exploded perspective view of the push button switch device.

FIG. 7 is a circuit diagram of a switch signal for inverter control by a conventional two-stage push button switch device.

[Explanation of symbols]

Reference Signs List 50 housing 51 push button 52 push button 54 contact 54a contact 56 coil spring 56a coil spring 58 protrusion 58a protrusion 60 intermediate switch 61 coil spring 64 contact 65 contact

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) H01H 13/64 H01H 9/54 H03K 17/969

Claims (1)

(57) [Claims] 1. A housing for a push button switch device, which is inserted into a long groove.
It has a contact which is urged into the groove under direction by input to the coil spring, and two push buttons Ru biased <br/> by a coil spring which is arranged between the housing, the elongated groove between the press button Inserted into the coil
It has a contact which is urged into the groove downward by a spring, a housing
Fitted an intermediate switch for multi that will be biased by arranged the coil spring during, Koiruba either of the push-button
By pressing down against the urging force of the spring , the multi-stage intermediate switch is urged by the coil springs via the projections protruding from each push button toward the multi-stage intermediate switch .
A push button switch device characterized in that it is pressed down against force .