JP3073217U - Switch device using matrix wiring - Google Patents

Abstract

(57) Abstract: In a switch device using matrix wiring, a process for mounting a jumper on a substrate is not required, and the manufacturing cost is reduced. SOLUTION: A circuit board 1 on which matrix wiring is provided
The upper carbon jumper 21 is a wiring 2 requiring a jump.
Are formed on the rubber plate 20 corresponding to the positions of the electric connection portions 10 and 11 by carbon printing together with the contact portions. When the rubber plate 20 and the circuit board 1 are mounted in the case 35, the rubber plate 20 is pressed by the protrusions 36 and 37, and the carbon jumper 21 contacts the electrical connection portions 10 and 11 on the circuit board 1 and performs wiring. 2 are connected.
The carbon printing may be performed only on the rubber plate 20 side.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to a switch device using a matrix wiring, and particularly to a switch device using a carbon jumper for a matrix wiring.

[0002]

[Prior art]

 2. Description of the Related Art Conventionally, for example, Japanese Utility Model Laid-Open No. 2-113487 discloses a remote control transmitter having a switch circuit. Japanese Patent Application Laid-Open No. Hei 10-23566 discloses that one of two switches is provided with a conductive selector for selectively supplying an electric signal from an energizer located at a position distant from the switch. The configuration to be deployed is disclosed.

As another prior art, there is a matrix wiring switch device shown in FIGS. FIG. 5 shows a matrix circuit. For example, a switch section 72 is disposed between a wiring 73 and a wiring 74, and a jumper section 75 is provided between the wiring 73 and the wiring 74.

FIG. 6A is a diagram showing a switch section 72 and a jumper section 75. Each of the contact portions 76 and 77 (shown by oblique lines) of the wirings 73 and 74 in the switch portion 72 is printed with carbon, and the contact portions 76 and 77 are arranged as shown in FIG. ON by the push button 78 on the rubber side operated by the switch. Turned off. On the lower surface of the push button 78, a contact 79 with carbon printing is provided. In the jumper section 75, carbon printing is applied to each of the electric connection sections 81 and 82 (shown by oblique lines) of the wiring 73, and a wiring 74 is provided between the electric connection sections 81 and 82. By jumping (the insulating film is provided except for the connection portion), a carbon jumper 83 is provided on the substrate 85, and thereby the electric connection portion 81 and the electric connection portion 82 are connected.

[0005]

[Problems to be solved by the invention]

 However, Japanese Unexamined Utility Model Publication No. Hei 2-113487 discloses a remote control transmitter, but does not disclose the wiring of a switch. Japanese Patent Application Laid-Open No. 10-23566 discloses that conductive wiring is provided between a switch and a current-carrying portion, but does not disclose a jumper that jumps over the wiring. In the switch device of the matrix wiring shown in FIGS. 5 and 6, a carbon print is applied to the contact 79 of the push button 78 on the rubber side for turning on / off the switch. Carbon printing is performed on the contact portions 76 and 77 of the carbon fiber 74, and carbon printing is performed on the carbon jumper 83 connecting the electric connection portion 81 and the electric connection portion 82 by jumping the wiring 74. As described above, it is necessary to perform carbon printing on both the rubber side and the substrate side, and accordingly, the number of processes is increased and the manufacturing cost is increased.

The present invention has been made to solve the above-mentioned problem, and eliminates carbon printing on a circuit board, and only requires carbon printing on an elastic plate side provided with a push button. It is an object of the present invention to provide a switch device using a matrix wiring which aims at reducing the manufacturing cost.

[0007]

[Means for Solving the Problems]

 In order to achieve the above object, the invention according to claim 1 is characterized in that a carbon jumper for jumping a wiring is arranged on a circuit board on which a matrix wiring is provided, and a carbon jumper for pressing a contact portion of the matrix is provided. A matrix wiring is used, which is formed by mounting an elastic plate on which a push button having a contact portion is formed on a circuit board and mounting a case having an opening for exposing the push button on the elastic plate. In the switch device, the carbon jumper is formed by carbon printing on a predetermined position of the elastic plate corresponding to a position of an electrical connection portion of a wiring requiring a jump, and when the elastic plate is mounted on a circuit board, the carbon jumper is formed of carbon. The jumper contacts the electrical connection on the circuit board to connect the wiring.

In this configuration, the circuit board on which the matrix wiring is formed requires a carbon jumper wire even if the pattern is well designed, but the carbon contact portion and the carbon jumper are simultaneously printed on the elastic plate by carbon printing. By doing so, it is not necessary to form a carbon jumper for a necessary jump portion on the circuit board, and the number of steps of carbon printing can be reduced.

According to a second aspect of the present invention, in the switch device using the matrix wiring according to the first aspect, a nickel plating process is applied to a contact portion and an electrical connection portion of the matrix on the circuit board. In this configuration, a plurality of nickel plating sections can be plated in one step.

According to a third aspect of the present invention, in the switch device using the matrix wiring according to the first or second aspect, an elastic plate is provided on an inner wall surface of the case corresponding to a contact position between the carbon jumper and the electrical connection portion. Are provided in the direction of the circuit board. In this configuration, when the elastic plate and the circuit board are incorporated in the case, the protrusion between the case and the carbon jumper is pressed against the electrical connection by a strong force, so that the contact between the carbon jumper and the electrical connection is reduced. It will be sure.

[0011]

[Embodiment of the invention]

 Hereinafter, a switch device using matrix wiring according to an embodiment of the present invention will be described with reference to the drawings. FIG. 1A shows the wiring arranged on the upper surface of the circuit board, and FIG. 1B shows the switch button. As shown in FIG. 1A, the wiring 2 and the wiring 3, the wiring 31, the wiring 32, and the switch unit 4 are formed on the upper surface of the substrate 1. Each of the contact portions 5 and 6 of the wirings 2 and 3 in the switch portion 4 is provided with a nickel plating at a portion indicated by oblique lines. The contact portion 5 and the contact portion 6 are turned on / off by a push button 7 shown in FIG. A conductive film 8 (carbon contact portion) on which carbon printing is performed is formed on the lower surface of the push button 7.

The wiring 2 is provided with end portions 10 and end portions 11 (electrical connection portions) indicated by oblique lines with a plurality of wirings (three in the figure) requiring a jump interposed therebetween. The surfaces of the end portions 10 and 11 are plated with nickel. It is necessary to provide a conductive jumper between the end 10 and the end 11, and this jumper is made of an elastic plate 20 (hereinafter referred to as a rubber plate) made of rubber or the like on which the push button 7 is integrally formed. (FIG. 2) is formed by carbon printing. This jumper is called a carbon jumper 21, and is indicated by a broken line in FIG.

FIG. 2 is a diagram schematically showing a part of the rubber plate 20 and a part of the substrate 1 on which push buttons are integrally formed. A carbon jumper 21 for jumping the wiring 3, the wiring 31, and the wiring 32 is formed by carbon printing on the lower surface of the rubber plate 20, and conducts between the end 10 and the end 11 of the wiring 2. Here, the carbon printing is performed only on the conductive film 8 (carbon contact portion) of the push button 7 on the rubber plate 20 side and the carbon jumper 21 and is not required to be performed on the substrate 1 side. An insulating film is formed on the surface of the substrate 1 except for a region for electrical connection.

FIG. 3 is a diagram schematically showing a part of a cross section of the switch device. In this figure, as described above, three wirings 3, wiring 31, and wiring 32 are arranged on the substrate 1, and these wirings are jumped to connect the end 10 and the end 11 of the wiring 2 to each other. A jumper 21 that is electrically connected is formed on the lower surface of the rubber plate 20 by carbon printing. On the upper surface of the rubber plate 20, a case 35 which is an outer shell of the switch device is mounted. Projections 36 and 37 are formed integrally with the case 35 on the inner wall surface of the case 35. The protrusion 36 presses the rubber plate 20 located on the end portion 11 of the wiring 2 to ensure the contact between the jumper 21 and the nickel-plated end portion 11. Further, the protrusion 37 presses the rubber plate 20 located on the end portion 10 of the wiring 2 so that the contact between the jumper 21 and the nickel-plated end portion 10 is ensured. Note that an insulating film (not shown) is formed on the wiring of the substrate 1 except for a region for electrical connection.

An opening 38 is formed at an appropriate position of the case 35, and the push button 7 integrated with the rubber plate 20 is exposed from the opening 38. When the push button 7 is pressed from above, the contact portion 5 of the wiring 2 and the contact portion 6 of the wiring 3 come into contact with the conductive film 8 of carbon, and the wiring 2 and the wiring 3 are conducted. In the above-described configuration, the jumper 21 may be printed on the lower surface of the rubber plate 20 having the push button 7 together with the carbon conductive film 8 by carbon printing, so that the number of carbon printing steps can be reduced.

FIG. 4 shows a configuration in which the present invention is applied to a remote control device used for a television, a video, and the like. FIG. 4A is a diagram of a part of a substrate of the remote control device as viewed from above. is there. In FIG. 4A, a plurality of (nine in the figure) matrix contact portions 105 are arranged on the upper surface of the substrate 100. In each of the contact portions 105, a portion shown by oblique lines of the wiring 110 and a portion shown by oblique lines of the wiring 111 are plated with nickel. FIG. 4B shows a main part of the contact portion 105. A conductive film 113 (carbon contact portion) is formed on the lower surface of the plurality of push buttons 107 formed by the rubber plate 108 by carbon printing. . Further, thin portions 161 and 162 are formed on the rubber plate 108, and when the push button 107 is pressed downward from above, these thin portions are bent to perform a switching operation.

As shown in FIG. 4A, carbon jumpers 130 and 131 indicated by two-dot chain lines are formed on the lower surface (back surface) of the rubber plate 108 by carbon printing. One carbon jumper 130 jumps one of the three wirings A and three of the wirings B, and connects the electrical connection parts 140, 141, and 142. Further, another carbon jumper 131 jumps the three wires B, and connects the electric connection portion 145 and the electric connection portion 146.

FIG. 4C is a diagram showing the lower surface (back surface) of the rubber plate 108. As shown in this figure, carbon jumpers 130 and 131 are carbon-printed on the lower surface of the rubber plate 108, and a conductive film 113 (carbon contact portion) is formed on the lower surface of the push button 107 by carbon printing. I have.

FIG. 4D is a simplified cross-sectional view of the remote control device, in which a rubber plate 108 is incorporated in a cover 150, and a push button 107 of the rubber plate 108 is exposed from an opening of the cover 150. As shown in FIG. 4B, a protrusion 151 is formed on the inner wall of the cover 150. The protrusions 151 are provided at positions corresponding to the carbon jumpers 130 and 131. When the rubber plate 108 is assembled into the cover 150, the protrusion 151 presses the rubber plate 108, and the electric connection portions 140 (141 and 142) and the carbon The contact with the jumper 130 (131) is ensured, and the contact between the electrical connection part 145 (146) and the carbon jumper 131 is also ensured. Further, an electric signal obtained by operating the push button of the switch device is photoelectrically converted by a well-known electric circuit and an infrared light emitting diode 170, and transmitted to a system requiring a switch operation.

The present invention is not limited to the above remote control device, but is applicable to various switch devices using matrix wiring, for example, a push switch on a front panel of a device set. In the above description, a carbon jumper is shown as a jumper, but any material other than carbon can be used as long as it can achieve substantially the same function, and the carbon jumper in the claims includes such a material.

[0021]

[Effect of the invention]

 As described above, according to the switch device using the matrix wiring of the present invention, the carbon jumper is carbon-printed together with the carbon contact portion on the lower surface of the elastic plate such as rubber forming the push button. In this case, a step of forming a carbon jumper on the circuit board is not required for a jump required portion on the circuit board, and the manufacturing cost of the switch device is reduced.

Further, since a plurality of electrical connection portions in the matrix circuit are plated with nickel, it is not necessary to print carbon on the substrate, so that the cost of parts can be reduced, and the electrical connection can be made by a single plating process. Since all parts are plated with nickel, the manufacturing cost of the substrate is also reduced.

Further, since the elastic plate is pressed in the direction of the substrate by the projection provided on the inner wall surface of the case of the device, the contact between the carbon jumper and the electrical connection portion is ensured, and the carbon jumper and the electrical connection portion are connected to each other. There is no poor contact, and the occurrence of poor electrical connection is prevented.

[Brief description of the drawings]

FIG. 1A is a plan view of a circuit board of a switch device according to an embodiment of the present invention, and FIG. 1B is a cross-sectional view illustrating a push button of the switch device.

FIG. 2 is a perspective view schematically showing a part of a rubber plate on which a push button is formed and a part of a substrate of the switch device.

FIG. 3 is a sectional view of a part of the switch device.

4A is a diagram illustrating a configuration in which the present invention is applied to a remote control device, FIG. 4B is a diagram illustrating a main part of a contact portion of the device,
(C) is a bottom view of the rubber plate of the device, and (d) is a simplified cross-sectional view of the device.

FIG. 5 is a diagram showing a known matrix wiring.

FIG. 6A is a plan view showing a board and a jumper portion of a conventional switch device, and FIG. 6B is a cross-sectional view of a push button portion of the switch device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Substrate 23,31,32 Wiring 4 Switch part 5,6 Contact part 7 Push button 8 Conductive film (carbon contact part) 10,11 Electrical connection part 20 Rubber plate (elastic plate) 21 Carbon jumper 36,37 Projection 100 Substrate 105 Contact portion 107 Push button 108 Rubber plate 110, 111 Wiring 113 Conductive film (carbon contact portion) 130, 131 Carbon jumper 140, 141, 142 Electrical connection portion 145, 146 Electrical connection portion 150 Cover 151 Projection

Claims (3)

[Utility model registration claims] 1. A rubber or the like in which a carbon jumper for jumping a wiring is arranged on a circuit board on which a matrix wiring is provided, and a push button having a carbon contact portion for pressing a contact portion of the matrix is formed. A switch device using matrix wiring, which is configured by mounting an elastic plate on the circuit board and mounting a case having an opening exposing the push button on the elastic plate, wherein the carbon jumper is Is formed by carbon printing on a predetermined position of the elastic plate corresponding to the position of the electrical connection portion of the wiring requiring a jump, and when the elastic plate is mounted on the circuit board, the carbon jumper is provided with the circuit. A switch using a matrix wiring, wherein the wiring is connected by contacting the electrical connection portion on the substrate. Pitch devices. 2. The switch device using matrix wiring according to claim 1, wherein a contact portion of the matrix and the electrical connection portion on the circuit board are plated with nickel. 3. A projection for pressing the elastic plate in the direction of the circuit board is provided on an inner wall surface of the case corresponding to a contact position between the carbon jumper and the electric connection portion. A remote control device using the matrix wiring according to claim 1.