JP2009021188A - Switch board - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a switch board having reduced processing manhours and processing cost while solving inconveniences due to the use of screws. <P>SOLUTION: The switch board is provided for switching on/off a switch mounted on the board with the operation of a switch top (4). It includes a switch part (3) storing the switch and the switch top (4) and having a screw fitting hole (5) inside and a sideway protrusion (6) on the side, and mounted on the board with the screw (8) threaded through the reverse of the board and fitted to the fitting hole (5), the protrusion (6) of the switch part (3) being protruded to the outside of the board, the protrusion (6) being fitted to a window (10) formed in a switch case (9), and the switch case (9) mounted on the switch part (3) with the switch top (4) exposed from a hole (11) of the switch case (9). <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a switch board that makes it easy to push a switch mounted on a board on which a circuit such as a flexible board (FPC) or a rigid board (RPC) is formed, and relates to a switch board that is mainly used for automotive electrical equipment.

  As a conventional switch board, two switches (metal dome shape) are attached to the end of the flexible board, and a mounting hole is formed in a terminal tab provided on the other end of the flexible board. A holding screw through the hole in the printed circuit board is screwed in and the flexible circuit board and the printed circuit board are connected in a conductive state. When the front cover is assembled to the rear housing, the front cover button is located on the switch. A switch that turns on / off a switch by operating this button is known (see Patent Document 1).

  In the switch board described in Patent Document 1, each of the pair of switches is made entirely of metal, and has a dome-shaped central portion of the metal and a corner leg portion formed in the central portion of the dome shape. A plurality of corner tabs. These switches are attached on the surface of the flexible substrate on the conductive pattern side by a plurality of corner tabs. Therefore, the surface on the flexible substrate side in the central portion of each switch is a movable contact. Each corner tab for mounting the switch is pressed through the flexible substrate and is bent on the opposite surface of the flexible substrate. Each of the conductive patterns extends along the flexible substrate, and the switch-side end of the conductive pattern is disposed below one switch, and the switch-side end of the conductive pattern is disposed below the other switch. Yes. The end of the conductive pattern on the switch side is bifurcated, one part divided into two is arranged below one switch, and the other part divided into two is arranged below the other switch. . A portion of each of the conductive patterns located under the movable contact of the switch is a fixed contact, and a plurality of fixed contacts are disposed under the movable contact of each switch. The flexible substrate includes a base layer provided with a conductive pattern, a spacer layer, a cover layer, and the like. In this flexible substrate, the corner tab of the switch is sandwiched between the base layer and the spacer layer in the flexible substrate. In addition, in the region below the dome-shaped central portion of the switch in the spacer layer of the flexible substrate, the conductive pattern having an opening for receiving the central portion of the switch when the switch is pressed and deformed is interrupted. Two gaps are formed, and each gap is provided in a region behind the switch and below the switch. One of the two gaps is formed between an end on one switch side in the conductive pattern and an end on the other switch side in the conductive pattern, and the end of one switch in the conductive pattern The other gap is formed between the end of the other switch in the conductive pattern. Therefore, when one switch is pressed and the switch is deformed, the bent metal part of the center of the deformed switch is deflected toward the conductive pattern, and when the switch comes into contact with the conductive pattern, the switch is not between the conductive pattern. By bridging the gap, a conductive path composed of the conductive pattern and one of the switches is completed. Similarly, when the other switch is pressed and the switch is deformed, the curved metal part of the center of the deformed switch bends toward the conductive pattern, and when the switch comes into contact with the conductive pattern, the switch By bridging the gap between them, a conductive path composed of the conductive pattern and the other switch is completed. In this way, one or both of the pair of switches are pushed and deformed to complete the conductive path. As a result, the volume control circuit of the printed circuit board, the conductive path on the flexible circuit board, the switch, and the like The constructed electric circuit is completed.

  Since the printed circuit board, the flexible substrate, and the rear housing part are fastened by the holding screws in Patent Document 1, since the board has holes, the circuit shape, the layout of components, etc. are restricted, or the screws are attached to the screws. There was also a risk of accidents such as metal powder, dust, etc. adhering to the substrate and causing a short circuit.

  Although the thing of patent document 1 is a volume switch assembly of a mobile telephone, what is shown in FIG. 6 thru | or FIG. 9 is known as a switch board | substrate for motor vehicle electrical equipment.

In order to make it easier to push the switch 101 mounted on the flexible substrate 100, the switch top 102 is placed in the switch case 103, and the switch case 103 is flexibly fitted to the reinforcing plate 104 provided on the substrate 100. . This fitting is performed by fitting a fitting hole 103 </ b> A formed in the switch case 103 into the fitting protrusion 104 </ b> A of the reinforcing plate 104. In addition to the switch 101, an electronic component 105 such as an LED is also mounted, and a screw through hole 106 is formed in the flexible substrate 100 and the reinforcing plate 104. A screw fitting hole 103 </ b> B is formed in the switch case 103 corresponding to the screw through hole 106. The screw 107 is screwed from below the reinforcing plate 104 to fix the switch case 103. In addition, a window 102A for confirming LED lighting is formed on the switch top 102.
JP 2000-92174 A (4th, 5th page, FIG. 2)

  In the conventional examples shown in FIGS. 6 to 9, the same inconvenience as in Patent Document 1 occurs due to the use of screws. Moreover, the processing man-hour for tightening a screw was also required. Furthermore, since the protrusions for fitting are provided on the substrate or the reinforcing plate, the shape of the substrate is complicated, and the processing cost is increased. In order to ensure switch contact, the upper surface of the substrate and the switch top must have a positional relationship within a certain accuracy. The board warpage increases when the board is large (width and length is about 100 mm) or when reflowing large electronic components due to thermal shrinkage of the solder. Sometimes. When the amount of warpage is not negligible, or when the backlash of the switch case and the board is large, the switch case and the board are fitted using screws and the two are in close contact. There was also a risk that it would not be corrected. Alternatively, if the number of fitting protrusions is increased for the purpose of correcting warpage, the processing cost further increases.

  Therefore, the present invention eliminates the conventional inconvenience caused by using a screw in the area of the board on which the switch component is mounted without passing the screw through the center of the board, and reduces the number of fitting protrusions. The purpose is to provide a switch board that reduces the processing man-hours and the processing cost.

  In order to achieve the above-described object, the present invention provides a switch board that is turned on / off by operating a switch top with respect to a switch mounted on the board. A switch part having a protrusion protruding laterally on the side is mounted on the board by fitting a screw screwed from the back of the board into a screw fitting hole, and the protrusion of the switch part is moved to the outside of the board. The protrusion is arranged so that the protrusion is fitted into a window formed in the switch case, and the switch top is exposed from the hole of the switch case, and the switch case is attached to the switch part.

  According to the present invention, in a switch board that is turned on / off by operating the switch top with respect to a switch mounted on the board, the switch and the switch stop are accommodated, the screw fitting hole is provided inside, and the side part is provided. A switch component having a protrusion protruding to the side is mounted on the board by fitting a screw screwed from the back of the board into the screw fitting hole, and the protrusion of the switch part is arranged to protrude to the outside of the board. The projection is fitted to the window formed in the switch case, and the switch top is exposed from the hole of the switch case so that the switch case is attached to the switch part.Therefore, the screw fitting hole is in the switch part mounting area. In addition, the screw is positioned inside the switch part, and it is located in the center of the area where various parts are mounted, and the conventional screw that is exposed on the board is used. Disadvantage is eliminated, further requires only one even protrusion for attachment of the switch case, and a substrate shape by providing the switch component is simplified, processing costs became cheaper. Furthermore, since the mounting with screws is as described above, there are no restrictions on the layout of mounted components, circuits, etc. on the board. Further, since the screw is in the switch part, there is no possibility that metal powder, dust, etc. adhering to the screw adhere to the substrate.

  Embodiments of the present invention will be described below with reference to the drawings.

  FIG. 1 shows an example in which a reinforcing plate 2 made of metal or FRP is provided on the back surface of the flexible substrate 1 and this area is used as various component mounting areas. The reinforcing plate 2 may be simply referred to as a substrate. In such a case (when the reinforcing plate 2 is an area of the flexible substrate 1 and the back reinforcing plate 2 is included), the switch component 3 is mounted at one corner of the substrate. The switch component 3 accommodates a switch and a switch top 4 (not shown), has a screw fitting hole 5 inside, and has a protrusion 6 protruding sideways on a side portion. The protrusion 6 is formed on the side of the octagonal columnar case 7, and the screw 8 is screwed into the screw fitting hole 5 from the back side of the reinforcing plate 2 to mount the switch component 3 on the substrate.

  FIG. 2 shows a state in which the projection 6 of the switch part 3 is fitted into the window 10 of the switch case 9, the switch top 4 is exposed from the hole 11 of the switch case 9, and the switch case 9 is attached to the switch part 3. Is. The wedge-shaped protrusion 6 is easily inserted into the window 10 of the switch case 9. Further, since the protrusions 6 are formed in advance on the switch parts instead of the substrate, the substrate shape is simplified, and the processing cost of the substrate (the reinforcing plate 2 and the flexible substrate 1) is reduced. FIG. 3 shows a plan view when the switch component 3 is mounted before the switch case 9 is mounted. In addition, because of the structure of the switch 3, in order to fit the board and the switch case 9, it is desirable that the arrangement of the switch component 3 is close to the side face of the board. Further, a screw fitting hole 5 is provided at a position that does not interfere with the operation of the switch top 4.

  In the embodiment shown in FIGS. 4 and 5, the screw fitting hole 5 is provided so as to pass through the inside of the case 7, and the tip of the screw 8 protrudes from the screw fitting hole 5 to form the screw hole 12 of the switch case 9. It is designed to be screwed in. In the embodiment shown in FIG. 2, the switch case 9 is attached to the switch component 3 by fitting the projection 6 to the window 10. When the backlash is large, the backlash can be eliminated by extending the screw 8 and screwing the tip into the switch case 9.

  Also in the present invention, in order to confirm the ON state of the switch, it is desirable to make the user visually recognize the light by using the LED as in the conventional example. Moreover, not only the combination of the flexible substrate 1 and the reinforcing plate 2, but also RPC can be used, or a membrane can be used. Furthermore, as the switch top 4, it is also preferable to use a switch made of a resin material having elasticity that dents when pressed with a finger.

  This switch board can be applied not only to automobile electrical equipment but also to household light switches, switches for game machines and TV remote controllers, switches for vending machines, and operation switches such as measuring instruments.

The perspective view which shows embodiment of this invention. The figure of the state which attached the switch case to the switch component of FIG. The top view of FIG. The perspective view which shows other embodiment. The figure of the state which attached the switch case. The perspective view which shows a prior art example. The perspective view of a switch case. The perspective view of a switch top. The perspective view at the time of an assembly.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Flexible board 2 Reinforcing plate 3 Switch part 4 Switch top 5 Screw fitting hole 6 Protrusion 8 Screw 9 Switch case 10 Window 11 Hole

Claims (3)

In a switch board that turns on / off the switch mounted on the board by operating the switch top,
A switch and switch stop are housed, a screw fitting hole is provided inside, and a switch part having a protrusion protruding laterally on the side is screwed into the screw fitting hole from the back of the board. Implemented in
The protrusion of the switch component is arranged to protrude to the outside of the substrate,
A switch board, wherein the projection is fitted into a window formed in the switch case, and the switch top is exposed from the hole of the switch case so that the switch case is attached to the switch component.   The switch board according to claim 1, wherein the screw penetrates the switch component, and a tip of the screw is screwed into the switch case.   The switch board according to claim 1, wherein the board is configured by providing a reinforcing plate on a back surface of a switch component mounting portion of the flexible board.

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