JPH03214520A - panel switch - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a panel switch used in an operating section of an electronic device or the like.

BACKGROUND OF THE INVENTION In recent years, as electronic devices have become increasingly popular, panel switches used in the operation sections of devices are also required to be of higher quality and cheaper.

FIG. 6 shows a wiring diagram on an insulating substrate of a conventional panel switch. In FIG. 6, 1a and 1b are wires connecting the outer contacts 2, and 3a to 3d are wires connecting the inner contacts 4 through the gaps between the outer contacts 2, which are divided into parts. Here, the structure of the location 5 where the wires 3a to 3d connecting the inner contacts 4 and the wires 1a, lb connecting the outer contacts intersect is as shown in FIG. 7, for example.

In FIG. 7, the wiring 3a has a structure in which it is disconnected by the wiring 1b, and in order to connect this disconnected part,
A hole 6a is made at a location corresponding to the disconnected wiring 3a in the insulation resist 6 provided to cover this part, and the hole 6a is
The disconnected parts are connected to each other by placing a jumper wire 7 between them.

FIG. 8 shows another wiring method. In FIG. 8, a wiring IO is provided on the back surface of the insulating substrate 8 through a through hole 9 provided in the insulating substrate 8, and a wiring 3a is connected thereto.

Problems to be Solved by the Invention However, the conventional wiring structure as described above has the following problems.

(1) If a double-sided wiring board with jumper wires or through holes is used for the wiring to be crossed, the printed circuit board becomes expensive.

(2) When cheap carbon is used for the jumper wire, the conduction resistance value of the wire becomes high.

The present invention is intended to solve these problems, and aims to provide a panel switch that is low in cost and has a wiring structure of excellent quality.

Means for Solving the Problems In order to solve the above-mentioned problems, the panel switch of the present invention has an inner contact and an outer contact divided into at least two parts disposed around the outer periphery of the inner contact, and has a wiring for the inner contact. The insulating substrate is formed between the divided outer contacts, and a diaphragm is conductive and electrically connects the at least two divided outer contacts.

Further, in the present invention, the divided outer contacts are electrically connected by a spacer having adhesive properties on both sides and having punch holes at locations corresponding to the inner contacts and the outer contacts and arranged on an insulating substrate. The diaphragm is positioned, and a sheet is placed on top of the diaphragm to press the diaphragm so that it does not come off the spacer punching plate.

Further, in the present invention, an insulating resist is provided at least in a portion other than the outer contact and the inner contact to ensure isolation between the inner contact and the diaphragm.

Effect: With the above configuration, the conductive diaphragm installed across each of the divided outer contacts is used as a jumper wire, and the wiring of the inner contact is routed between each of the divided outer contacts. Accordingly, the wiring of the internal contact and the wiring of the external contact can be crossed without requiring jumper wires or through holes on the insulating substrate, and the printed circuit board can be constructed at low cost.

Example An embodiment of the present invention will be described below based on the drawings.

FIG. 1 is a plan view showing pattern wiring in a panel switch according to an embodiment of the present invention. In Figure 1, ll
a. The outer contacts 12a and 12b of llb are wired, and the outer contact +2b is divided into two.

Wiring 13a-Hd connects the inner contacts 14, and is formed through the gap between the outer contacts 12b without intersecting the wiring 1lb.

FIG. 2 is a diagram illustrating a switch structure using two divided external contacts 12b. FIG. 2(A) shows the configuration of the outer contact +2b portion, where the outer contact 12b is divided into two parts, and the inner contact 14
are connected by a wiring 13a passing through the gap between the external contacts 12b. Reference numeral 15 denotes a diaphragm, and as shown in the cross-sectional view of FIG. 2(B), it has a configuration in which it has a gap C with the wiring Ha and is not electrically connected.

In addition, the diaphragm 15 has electrical conductivity, as shown in FIG. 2(C).
As shown in the cross-sectional view, the outer contact point 12b divided into two parts is electrically connected by a diaphragm 15 extending therebetween. Next, diaphragm 15
In order to position the
A double-sided adhesive spacer 16 having punch holes 16a at locations corresponding to the outer contact 13b and the inner contact l4 is placed over the entire surface of the insulating substrate 19, and a sheet 17 is placed on top of the spacer 16, including the diaphragm 15. installed on the entire surface,
A switch button 18 is provided on the seat 17 at a portion corresponding to the diaphragm 15.

By configuring in this way, the external contact point divided into two +
2b can be electrically connected by the conductive diaphragm 15, and there is no need to provide a separate crossing point as in the conventional case.

In FIG. 2(B), in order to form the gap C, the gap C may be provided by forming the diaphragm l5 as in this embodiment, or an insulating layer may be formed in the gap C.

Since the diaphragm can generally be easily constructed from a highly conductive material such as copper or silver, it is possible to construct a circuit with low contact resistance.

FIG. 3 is a diagram showing the switch structure of a panel switch according to another embodiment of the present invention. In FIG. 3, the external contact 22b is divided into three parts, and the wiring 2l is connected to a pair of external contacts 22b.
b is connected. The inner contact 24 is connected to a wiring 23a that passes through the gap between the outer contact 22b divided into three parts. Further, the conductive diaphragm 25 is lifted up by three legs 25a provided so as to contact each of the three external contacts 22b, and is electrically insulated from the wiring 23a with a gap. At the same time, it is electrically connected to the external contact 22b. Note that the external contact point 22b shown in FIG. 3 may be divided into a large number of parts instead of being divided into three parts.

FIG. 4 is a diagram showing a switch structure in a panel switch of still another embodiment. In FIG. 4, 3lb is a wiring connected to the outer contact 32b divided into two parts, and 33a is a wiring connected to the inner contact 34, which has a copper foil pattern shown in FIG. 5(C).

A resist 36 is an insulating layer, and has a resist pattern as shown in FIG. 37. 38 is a carbon contact point, Fig. 5 (A)
It has a carbon contact pattern shown in FIG. 3, which is disposed on the resist pattern and connected to the outer contacts 32b1 and the inner contacts 34, respectively, to prevent corrosion of these contacts. 3
A diaphragm 6 is arranged on the carbon contact pattern and electrically connects the carbon contacts 37.

With the configuration shown in FIGS. 4 and 5, the gap C shown in FIG. 2(B) is secured by being covered with the resist, which is an insulating layer shown in FIG. 5(B), and the diaphragm 35 and the internal contact 34 can be insulated. Note that the carbon contact 37 in FIG. 5(A). In addition to carbon, ink 38 may be made of any material as long as it is conductive.

Effect of the invention According to the present invention, the following effects are achieved.

(1) The printed circuit board becomes cheaper because the pattern that is about to intersect with the pattern on the insulating substrate can be crossed without using a double-sided wiring board via a through hole or a printed jumper wire.

(2) Since the jumper wire is composed of a diaphragm with low electrical resistance, the conduction resistance value of the pattern is low.

[Brief explanation of drawings]

FIG. 1 is a pattern wiring diagram of a panel switch according to an embodiment of the present invention, and FIG. 2 (A) is a plan view showing the shape of its contacts.
B) is an AA sectional view, (C) is a BB sectional view, and (D) is (
B) is a cross-sectional view showing an example of fixing the operating section and diaphragm; FIGS. 3 and 4 are plan views showing contact shapes of other embodiments, and FIGS. 5(A) to (C) are FIG. 4. FIG. 6 is a pattern wiring diagram of a conventional panel switch, and FIGS. 7 and 8 are cross-sectional views showing examples of conventional pattern connections. 12b, 22b, 32b...divided external contacts,
14, 24.34...inner contact point, 15, 25. 3
5...Diaphragm, 16...Spacer, 17...
- Sheet, 18... Button, 19... Insulating board.

Claims (1)

[Claims] 1. It has an inner contact and an outer contact divided into at least two parts arranged around the outer periphery of the inner contact, and wiring for the inner contact is formed through between the divided outer contacts. A panel switch comprising an insulating substrate and a diaphragm that is conductive and electrically connects the divided external contacts. 2. An insulating substrate having an inner contact and an outer contact divided into at least two parts arranged around the outer periphery of the inner contact, and in which wiring for the inner contact is formed between the divided outer contacts, and an insulating substrate on both sides. a spacer that is adhesive and has punched holes at locations corresponding to the inner and outer contacts and is disposed on the insulating substrate; and a spacer that has conductivity and is positioned in the punched holes of the spacer. A panel switch comprising: a diaphragm that electrically connects the divided external contacts; and a sheet that is placed on top of the spacer and the diaphragm and presses the diaphragm so that it does not come out of the spacer hole. 3. The panel switch according to claim 1 or 2, wherein an insulating resist is provided at least at a portion excluding the outer contacts and the inner contacts.