JP2017130292A - Switch body - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a thin type switch body.SOLUTION: A switch body 100 includes a wiring board 10, a spacer 20, a movable contact body 30, and a protection sheet 50. A center fixed contact portion 11A and an outer fixed contact portion 12A are disposed on the upper surface of the wiring substrate 10. The center fixed contact portion 11A and the outer fixed contact portion 12A are disposed at the upper surface position of the wiring substrate 10 which corresponds to the inside of a hole portion 20A of a spacer 20. The movable contact body 30 is a member of an elastic metal thin plate protruding upwards and is mounted on the upper surface of the wiring board 10 so that the outer peripheral lower edge abuts against the outer fixed contact portion 12A. The lower surface of the center portion of the movable contact body 30 faces the center fixed contact portion 11A through a predetermined gap therebetween.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a switch body used in an operation unit of various electronic devices.

  In recent years, a switch body in which a switch is mounted on a wiring board is widely used in various electronic devices in order to perform various operations.

  A conventional switch body is configured by, for example, a switch as disclosed in Patent Document 1 soldered and mounted on a wiring board. Note that the switch in the conventional switch body includes a switch case in which a metal member is insert-molded in an insulating resin member, and a movable contact body mounted in a recess of the switch case. A pair of fixed contact portions disposed on the inner bottom surface of the recess of the switch case and the movable contact body constitute a switch contact portion.

JP2013-58380A

  However, the conventional switch body is configured by mounting the switch on a wiring board, and there has been a demand for further thinning.

  The present invention solves such a conventional problem, and an object thereof is to provide a thin switch body.

  To achieve the above object, the present invention provides a wiring board on which first and second fixed contact portions are formed, and a hole is formed at a position corresponding to the first and second fixed contact portions. A spacer fixed so as to be laminated, a movable contact body that is housed in the hole portion of the spacer and electrically connects the first and second fixed contact portions, and covers the hole portion from above. The switch body is provided with a protective sheet disposed above the spacer and held on the upper surface of the spacer, and a pressing body disposed on the lower surface of the protective sheet corresponding to the hole. It is.

  In this case, since the switch body can be configured without mounting the switch, the height of the switch body can be reduced.

  According to the present invention, it is possible to obtain an advantageous effect that the switch body is simply configured and can be thinned.

Sectional drawing of the switch body 100 by embodiment of this invention Exploded perspective view Same perspective view

  Hereinafter, embodiments of the present invention will be described with reference to FIGS.

(Embodiment)
1 is a sectional view of a switch body 100 according to an embodiment of the present invention, FIG. 2 is an exploded perspective view thereof, and FIG. 3 is a perspective view thereof.

  As shown in the figure, the switch body 100 includes a wiring board 10, a spacer 20, a movable contact body 30, a pressing body 40, and a protective sheet 50. A central fixed contact portion 11A and an outer fixed contact portion 12A are disposed on the upper surface of the wiring board 10. The central fixed contact portion 11 </ b> A and the outer fixed contact portion 12 </ b> A are disposed at the upper surface position of the wiring board 10 corresponding to the inside of the hole 20 </ b> A of the spacer 20. The movable contact body 30 is a member of a thin elastic metal plate protruding upward, and is mounted on the upper surface of the wiring board 10 so that the lower end of the outer periphery contacts the outer fixed contact portion 12A. The movable contact body 30 has the lower surface of the central portion facing the central fixed contact portion 11A with a predetermined gap. The protective sheet 50 is disposed so as to cover the hole 20 </ b> A of the spacer 20, and is held on the upper surface of the spacer 20. The pressing body 40 is disposed at the lower surface position of the protective sheet 50 corresponding to the hole 20A.

  Thus, since the movable contact body 30 is mounted on the upper surface of the wiring board 10, the switch body 100 has a simple configuration and can be made thin.

  The detailed configuration and operation of the switch body 100 will be described below.

  As illustrated in FIGS. 1 to 3, the switch body 100 includes a wiring board 10, a spacer 20, a movable contact body 30, movable members 31 and 32, a pressing body 40, and a protective sheet 50. The wiring board 10 has center fixed contact portions 11A to 11C and outer fixed contact portions 12A to 12C. The spacer 20 has holes 20A to 20C.

  The wiring board 10 is an insulating material wiring board on which a predetermined conductive pattern is formed, and is composed of a flexible polyimide flexible board (FPC) or the like. The wiring board 10 includes a strip-shaped main body portion 10A formed with a predetermined width and a lead portion 10B extending outward from the main body portion 10A with a predetermined width. Then, on the upper surface of the wiring board 10, there are center fixed contact portions 11A to 11C that are circular in top view and outer fixed contact portions 12A to 12C that are annular in top view and are arranged so as to surround the center fixed contact portions 11A to 11C, respectively. Is formed. The central fixed contact portions 11A to 11C and the outer fixed contact portions 12A to 12C are electrically independent from each other, and are formed at the leading end portion of the lead portion 10B via a lead wire (not shown) disposed on the wiring board 10. It is electrically connected to a connection terminal (not shown). And the switch body 100 is used as an input operation part of an electronic device, when the said connection terminal is connected to the connector part of the electronic device which is not shown in figure.

  The spacer 20 is a strip-shaped member made of a resin having a predetermined thickness and formed in a top view shape equivalent to the main body portion 10A of the wiring substrate 10, and includes the central fixed contact portions 11A to 11C and the outer fixed contacts. Hole portions 20A to 20C are formed at positions corresponding to the portions 12A to 12C, respectively. The top view shapes of the holes 20A to 20C are slightly larger than the movable contact body 30 described later. In the present embodiment, the holes 20A to 20C are formed in an oval shape (oval shape) in a top view. The spacer 20 is fixed to the upper surface of the wiring substrate 10 with a thermosetting adhesive or an ultraviolet curable (UV curable) adhesive formed on the lower surface of the spacer 20. As described above, in the switch body 100, the central fixed contact portions 11 </ b> A to 11 </ b> C and the outer fixed contact portions 12 </ b> A to 12 </ b> C are arranged inside the holes 20 </ b> A to 20 </ b> C of the spacer 20.

  In the present embodiment, the spacer 20 in which the three holes 20A to 20C are formed is stacked on the wiring substrate 10. However, for example, three spacers in which only one hole 20A is formed are provided. The spacers may be prepared and laminated so as to be connected to the upper surface of the wiring board 10.

  The movable contact body 30 is made of an elastic thin plate metal formed in an upward convex dome shape, and is formed in a so-called oval shape in which both ends thereof are cut out by parallel straight lines from a circular shape in top view. ing. The movable contact bodies 30 are respectively accommodated in the hole portions 20 </ b> A to 30 </ b> C of the spacer 20 and mounted on the upper surface of the wiring substrate 10. Accordingly, the lower end of the outer periphery of the movable contact body 30 is in contact with the upper surfaces of the outer fixed contact portions 12 </ b> A to 12 </ b> C of the wiring board 10. The lower surface of the central portion of the movable contact body 30 is opposed to the upper surfaces of the central fixed contact portions 11A to 11C with a predetermined interval. The movable contact body 30 is a member that functions as a movable contact. For example, when the movable contact body 30 accommodated in the hole 20A of the spacer 20 is pressed from above, the movable contact body 30 is reversed downward with a click feeling. Then, the lower surface of the central portion of the movable contact body 30 and the central fixed contact portion 11A come into contact with each other. Thereby, the central fixed contact portion 11 </ b> A and the outer fixed contact portion 12 </ b> A are electrically connected via the movable contact body 30. In addition, since it is the same when the movable contact body 30 accommodated in the holes 20B to 20C is pressed, the description is omitted. As described above, the switch body 100 includes at least the switch contact portions 100A to 100C configured by the movable contact body 30, the central fixed contact portions 11A to 11C, and the outer fixed contact portions 12A to 12C, respectively.

  The movable members 31, 32 are made of an elastic thin metal plate formed in an upward convex shape, and are formed in the same shape as the movable contact body 30. The movable members 31 and 32 may be the same as the movable contact body 30. The movable member 31 is arranged above the movable contact body 30. The movable member 32 is arranged above the movable member 31. The movable members 31 and 32 are members that generate a click feeling. When a pressing operation is performed from above, the movable members 31 and 32 are reversed downward along with the click feeling. The movable members 31 and 32 are not necessarily formed of the same material as that of the movable contact body 30, and may be formed of an insulator such as an insulating resin. Moreover, there is no limitation in particular in the number of the movable members 31 and 32 accommodated in the hole parts 20A-20C, for example, only the movable member 31 may be sufficient. Furthermore, the movable members 31 and 32 may be omitted.

  The protective sheet 50 is made of an insulating film, and is disposed above the spacer 20 so as to cover the holes 20A to 20C. The outer periphery of the protective sheet 50 is fixed to the upper surface of the spacer 20. In other words, the hole portions 20A to 20C of the spacer 20 are closed by the protective sheet 50 so as to be sealed. The protective sheet 50 may be fixed so as to surround the vicinity of the outer edge portions of the hole portions 20A to 20C of the spacer 20 over the entire circumference. In the present embodiment, the protective sheet 50 is welded and fixed to the upper surface of the spacer 20 by laser irradiation or ultrasonic processing. In addition, when welding and fixing, it is good to comprise the protection sheet 50 and the spacer 20 with the same material. The protective sheet 50 may be held on the upper surface of the spacer 20 by a thermosetting adhesive, an ultraviolet curable (UV curable) adhesive, an adhesive, or the like.

  Further, in the present embodiment, the holes 20A to 20C are covered with one protective sheet 50, but the holes 20A to 20C may be covered using three protective sheets smaller than the protective sheet 50, respectively. Good.

  The pressing body 40 is a member made of an insulating resin formed in a columnar shape. In the present embodiment, the three pressing bodies 40 are respectively fixed to the lower surface of the protective sheet 50. The pressing bodies 40 are respectively placed on the upper surface position at the center of the movable member 32. The protective sheet 50 and the pressing body 40 are also welded and fixed by laser irradiation or ultrasonic processing. In addition, when welding and fixing, it is good to comprise the protection sheet 50 and the press body 40 with the same material. The pressing body 40 may be fixed to the protective sheet 50 with a thermosetting adhesive, an ultraviolet curable (UV curable) adhesive, or the like. Furthermore, the pressing body 40 may be hot-pressed from the lower surface side of the protective sheet 50 to fix them together.

  The switch body 100 is configured as described above. And the switch body 100 is comprised by what connected three switch contact part 100A-100C continuously. The technical idea of the present invention may be a switch body having only the switch contact portion 100A.

  Next, the operation of the switch body 100 will be briefly described by taking the operation of the switch contact portion 100A as an example. The operation in the switch contact portions 100B and 100C is the same. When the pressing body 40 is pressed downward via the protective sheet 50, the pressing force is transmitted to the movable members 31 and 32 and the central portion of the movable contact body 30 via the pressing body 40, and they are all reversed. Thereby, the lower surface of the central portion of the movable contact body 30 and the central fixed contact portion 11A come into contact with each other. Thereby, the center fixed contact portion 11A and the outer fixed contact portion 12A are electrically connected via the movable contact body 30, and the switch contact portion 100A is turned on. When the operation is canceled, the movable members 31 and 32 and the movable contact body 30 are restored to the original upward convex dome shape by their own restoring force and returned to the off state.

  As described above, the switch body 100 having the configuration does not need to be configured by mounting the switch on the wiring board, and can be realized in a simple configuration, so that the height of the switch body can be reduced.

  Since the switch body by this invention becomes a simple structure, it is excellent in thickness reduction, and is useful for the electronic device which mounts the electronic component by this invention.

DESCRIPTION OF SYMBOLS 10 Wiring board 10A Main body part 10B Drawer part 11A-C Center fixed contact part 12A-C Outer fixed contact part 20 Spacer 20A-C Hole part 30 Movable contact body 31, 32 Movable member 40 Press body 50 Protection sheet 100 Switch body 100A- C Switch contact

Claims (4)

A wiring board on which first and second fixed contact portions are formed;
A hole formed at a position corresponding to the first and second fixed contact portions, and a spacer fixed to be laminated on the wiring board;
A movable contact body accommodated in the hole of the spacer and electrically connecting the first and second fixed contact portions;
A protective sheet disposed above the spacer so as to cover the hole from above, and held on the upper surface of the spacer;
A pressing body disposed at a lower surface position of the protective sheet corresponding to the hole,
Switch body with Further comprising a movable member arranged to overlap the movable contact body,
The switch body according to claim 1. A wiring board on which first, second, third, and fourth fixed contact portions are formed;
A spacer laminated on the wiring board in which the first hole portion exposed from the first and second fixed contact portions and the second hole portion exposed from the third and fourth fixed contact portions are formed;
A first movable contact body housed in the first hole portion to electrically connect the first and second fixed contact portions;
A second movable contact body housed in the second hole portion to electrically connect the third and fourth fixed contact portions;
A protective sheet disposed above the spacer so as to cover the first and second holes, and held on the upper surface of the spacer;
A first pressing body disposed at a lower surface position of the protective sheet corresponding to the first hole,
A second pressing body disposed at a lower surface position of the protective sheet corresponding to the second hole,
Switch body with A first movable member disposed to overlap the first movable contact body;
A second movable member disposed so as to overlap the second movable contact body,
The switch body according to claim 3.

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