JP2579992B2 - 2-circuit push button switch - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a two-circuit push button switch used for data input of an electronic device.

2. Description of the Related Art Conventionally, a push button switch provided on an operation panel of an electronic device has a structure as shown in FIG. 5 and FIG. That is, this push button switch is
As shown, an insulating sheet having fixed contacts 72 disposed on a substrate 70 supporting a push button switch.
71, a diaphragm 74 for generating a sense of moderation, an insulating spacer 73 for insulating the diaphragm 74 from the fixed contact 72, a space 75 for fixing the position of the diaphragm 74, and a movable contact 76 disposed thereon. Insulation sheet 77
And a dowel seat 79 having a dowel 79a for transmitting the pressing force from the design panel 80 to the center of the diaphragm 74, and a spacer 78 supporting the dowel. Then, by holding down the design panel 80, the seat 79 with dowels
, The diaphragm 74 is inverted, and the movable contact 72 and the diaphragm 74, that is, the movable contact 76 and the fixed contact 72, are electrically connected to perform switching.

Problems to be Solved by the Invention By the way, in recent years, as seen in word processors, copiers, facsimiles, videos, and the like, the functions have become complicated, the number of operation buttons has increased, and a display has been provided. For this reason, when the push button to be operated is lightly pressed, the operation of the push button is displayed on the display, and when the button is pressed strongly, a function of starting a predetermined operation is desired. In the switch, such a function, ie, 2
It did not have circuit on / off.

Therefore, an object of the present invention is to provide a two-circuit push button switch that can solve the above-mentioned problems.

Means for Solving the Problems In order to solve the above problems, according to claim 1 of the present invention,
The circuit push button switch has a bowl-shaped conductive diaphragm disposed between a substrate and an insulating sheet disposed above the substrate via a spacer so as to have a gap with respect to the substrate and the insulating sheet. A first contact corresponding to a diaphragm is arranged on the upper surface of the substrate, a second contact corresponding to the diaphragm is arranged on the lower surface of the insulating sheet, and a third contact connected to a peripheral edge of the diaphragm is arranged on the upper surface of the substrate. It is.

Further, in the two-circuit push button switch according to claim 2 of the present invention, a first insulating sheet, a second insulating sheet, and a third insulating sheet are sequentially disposed above a substrate via a spacer so as to have a gap, respectively. A bowl-shaped diaphragm is arranged between the first insulating sheet and the second insulating sheet,
A first contact and a second contact are arranged on the opposing surfaces of the upper surface of the substrate and the lower surface of the first insulating sheet, and a third contact is disposed on the opposing surfaces of the upper surface of the second insulating sheet and the lower surface of the third insulating sheet.
A contact and a fourth contact are arranged, and a spacer having a hole smaller than the outer shape of the diaphragm is arranged between the substrate and the first insulating sheet.

According to the configuration of each of the above claims, since two switch circuits are configured with the diaphragm interposed therebetween, the operating pressing force of one switch circuit is set to be weaker than the reversing force of the diaphragm that opens and closes the other switch circuit. By doing so, two switch circuits can be sequentially turned on by one push-button operation unit.

Embodiment An embodiment of a two-circuit push button switch according to claim 1 of the present invention will be described below with reference to FIG. 1 and FIG.

In FIG. 1, reference numeral 1 denotes a substrate, on which a lower insulating sheet 2, an intermediate insulating sheet 3, a lower spacer 4, an intermediate spacer 5, an upper insulating sheet (insulating sheet) 6, an upper spacer 7, and a dowel 8a are provided. A seat 8 with a dowel and a decorative panel 9 are provided one after another, and a bowl-shaped conductive diaphragm 10 is provided in a central hole of the lower and intermediate spacers 4 and 5, and a convex portion 10a thereof has an upper portion. It is arranged to be located at. A hole is provided in a portion of the intermediate insulating sheet 3 corresponding to the center of the diaphragm 10, and a first contact (fixed setting) 11 is disposed on the upper surface of the lower insulating sheet 2 in this portion. A second contact (movable contact) 12 is arranged below the upper insulating sheet 6 corresponding to the convex portion 10a and the convex portion 10a. Further, on the upper surface of the intermediate insulating sheet 3 corresponding to the peripheral portion 10b of the diaphragm 10, a diaphragm is provided. A third contact (fixed contact) 13 connected to 10 is arranged. Then, after the diaphragm 10 is inserted, a gap is formed between the first contact 11 and the diaphragm 10 and between the diaphragm 10 and the second contact 12. Therefore, the first contact 11 and the diaphragm
10 and between the second contact 12 and the diaphragm 10, respectively. In addition,
The lower spacer 4 is for positioning the diaphragm 10,
The second contact 12 is held by the intermediate spacer 5 and the upper insulating sheet 6. 14 is an air hole. Further, a configuration in which a push button is provided instead of the dowel sheet 8 may be adopted.

Next, a switching operation will be described with reference to FIG.

FIG. 2 (a) shows a state where no pressing force is applied through the dowel 8a, and the first contact 11 and the diaphragm are not shown.
Since the diaphragm 10 and the second contact 12 are not in contact with each other, both switch circuits are all in the off state.

FIG. 2 (b) shows a state in which a weak pressing force such that the upper insulating sheet 6 is bent is applied through the dowel 8a.
While the second contact 12 and the diaphragm 10 are in contact with each other and one of the switch circuits is turned on, the first contact 11 and the diaphragm 10 are not in contact, so the other switch circuit remains off. It is.

FIG. 2C shows a state in which a strong pressing force equal to or greater than the reversal load of the diaphragm 10 is applied through the dowel 8a. 10 comes into contact with the first contact point 22. Therefore, both switch circuits are turned on.

The above-described method for detecting the switching state can be easily detected by using either the third contact 13 or the second contact 12 on the diaphragm 10 as an output signal and the remaining contacts as input signals.

By the way, in the above embodiment, the first contact 11 is disposed on the lower insulating sheet 2 and the third contact 13 is disposed on the intermediate insulating sheet 3, respectively. However, as shown in FIG. The contact 13 may be arranged directly on the upper surface of the printed circuit board 21. In this case, the two contacts 11, 13 are connected to the printed circuit board 21.
The advantage is that the contacts can be mounted at the time of manufacturing the substrate.

Next, an embodiment of the two-circuit push button switch according to claim 2 will be described with reference to FIG.

In FIG. 4, reference numeral 51 denotes a substrate above which a lower insulating sheet 52, a lower spacer 53, a first intermediate insulating sheet (first insulating sheet) 54, an intermediate spacer 55, and a second intermediate insulating sheet (first 2 insulating sheets) 56, an upper spacer 57, an upper insulating sheet (third insulating sheet) 58 and a decorative panel 59 are sequentially arranged, and each of the spacers 53, 55, 57 is provided with a hole over a predetermined range, Lower gap 60, middle gap 61
And an upper gap 62. A bowl-shaped diaphragm 63 is provided in the intermediate gap 61,
63a is located at the upper position, and the lower clearance 6
A first contact (fixed contact) 64 and a second contact (movable contact) 65 are respectively disposed on opposing surfaces of the two insulating sheets 52, 54. A third contact (movable contact) 66 and a fourth contact (movable contact) 67 are arranged on the surfaces facing each other. Therefore, between the first contact 64 and the second contact 65 and the third contact 66
This means that a switch circuit is formed between the switch and the fourth contact 67. 68 is an air hole.

In the above configuration, the diaphragm is pressed with a weak pressing force.
Pressing the decorative panel 59 at a position corresponding to above the 63
The contact 66 and the fourth contact 67 are brought into contact with each other, and one of the switch circuits is turned on. When the switch 66 is further pressed with a strong pressing force, the first intermediate portion insulating sheet 54 is pushed through the diaphragm 63 and the second intermediate circuit 54 is pushed. The contact 65 and the first contact 64 are brought into contact with each other, and the other switch circuit is also turned on. According to this configuration,
Since the diaphragm is not used as a direct contact, no problem occurs even if the diaphragm becomes dirty or rusted.
Therefore, handling in production becomes very easy.

Further, since the hole of the spacer 53 between the lower insulating sheet 52 and the first intermediate insulating sheet 54 is smaller than the outer shape of the diaphragm 63, the holding of the diaphragm 63 is ensured and a stable reversing operation can be obtained.

By the way, the diaphragms 10 and 3 described in each of the above embodiments are described.
The reversing force of 9,63 is set to be strong enough to give a sense of moderation when pressed, and the front panel (such as a decorative panel) that is pressed first must be pushed in more strongly than in the bent state. The force is set so that the diaphragm is reversed at that time.

According to the configuration of each claim of the present invention, since two switch circuits are configured with the diaphragm interposed therebetween, the operating pressing force of one switch circuit is determined by the reversal force of the diaphragm that opens and closes the other switch circuit. If you also set it weakly,
Two switch circuits can be sequentially turned on by one push button operation unit. Also, in particular, according to the configuration of claim 2, since the diaphragm is not used as a direct contact,
Even if the diaphragm becomes dirty or rusted, no problem occurs, and therefore, handling in production becomes very easy.

[Brief description of the drawings]

FIG. 1 is a partially cutaway perspective view of a two-circuit push button switch according to one embodiment of the present invention, and FIG. 2 (a).
(B) and (c) are cross-sectional views for explaining the operation of the push-button switch, FIG. 3 is a cross-sectional view of another embodiment of the push-button switch, and FIG. 4 is an embodiment of claim 2 of the present invention. , FIG. 5 is a partially cutaway perspective view of a conventional push button switch, and FIG. 6 is a sectional view of the same push button switch. 1 ... substrate, 6 ... upper insulating sheet, 10 ... diaphragm, 11 ... first contact, 12 ... second contact, 13 ... third contact,
51 ... board, 52 ... lower insulating sheet, 53 ... spacer,
54: 1st intermediate insulating sheet, 56: 2nd intermediate insulating sheet, 58: upper insulating sheet, 60, 61, 62 ... gap, 63
... diaphragm, 64 ... first contact, 65 ... second contact,
66 ... third contact, 67 ... fourth contact.

Claims (2)

(57) [Claims] 1. A bowl-shaped conductive diaphragm is arranged between a substrate and an insulating sheet disposed above the substrate via a spacer so as to have a gap with respect to the substrate and the insulating sheet; A two-circuit in which a first contact corresponding to a diaphragm is arranged on the upper surface of the substrate, a second contact corresponding to the diaphragm is arranged on the lower surface of the insulating sheet, and a third contact connected to a peripheral edge of the diaphragm is arranged on the upper surface of the substrate. Push-button switch. 2. A first insulating sheet, a second insulating sheet, and a third insulating sheet are sequentially disposed above a substrate via a spacer so as to have a gap therebetween, and the first insulating sheet, the second insulating sheet, A first contact and a second contact are disposed on opposing surfaces of the upper surface of the substrate and the lower surface of the first insulating sheet, and the upper surface of the second insulating sheet and the third insulating film. A two-circuit pusher in which a third contact and a fourth contact are arranged on surfaces facing each other with a sheet lower surface, and a spacer having a hole smaller than the outer shape of the diaphragm is arranged between the substrate and the first insulating sheet. Button switch.