WO2012053187A1 - Key sheet and movable-contacts body using same - Google Patents

Key sheet and movable-contacts body using same Download PDF

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Publication number
WO2012053187A1
WO2012053187A1 PCT/JP2011/005803 JP2011005803W WO2012053187A1 WO 2012053187 A1 WO2012053187 A1 WO 2012053187A1 JP 2011005803 W JP2011005803 W JP 2011005803W WO 2012053187 A1 WO2012053187 A1 WO 2012053187A1
Authority
WO
WIPO (PCT)
Prior art keywords
light
light emitting
sheet
cover sheet
movable contact
Prior art date
Application number
PCT/JP2011/005803
Other languages
French (fr)
Japanese (ja)
Inventor
直樹 立畠
田邉　功二
寛敏 渡辺
勝彦 加藤
清道 渭原
Original Assignee
パナソニック株式会社
信越ポリマー株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by パナソニック株式会社, 信越ポリマー株式会社 filed Critical パナソニック株式会社
Priority to JP2012539595A priority Critical patent/JPWO2012053187A1/en
Publication of WO2012053187A1 publication Critical patent/WO2012053187A1/en

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H13/00—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch
    • H01H13/70—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard
    • H01H13/83—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard characterised by legends, e.g. Braille, liquid crystal displays, light emitting or optical elements
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2219/00—Legends
    • H01H2219/028—Printed information
    • H01H2219/034—Coloured areas
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2219/00—Legends
    • H01H2219/054—Optical elements
    • H01H2219/056—Diffuser; Uneven surface
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2219/00—Legends
    • H01H2219/054—Optical elements
    • H01H2219/058—Optical grid, collimator or microlouver
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2219/00—Legends
    • H01H2219/054—Optical elements
    • H01H2219/062—Light conductor
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2219/00—Legends
    • H01H2219/054—Optical elements
    • H01H2219/064—Optical isolation of switch sites
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/02—Constructional features of telephone sets
    • H04M1/22—Illumination; Arrangements for improving the visibility of characters on dials

Definitions

  • the present invention relates to a key sheet mainly used for an operation unit of various electronic devices and a movable contact body using the key sheet.
  • the operation unit is identified by emitting light from a light emitting diode or EL element. More and more can be operated easily. Along with this, there is a demand for switches that can be used in the operation unit of these devices that are easy to use and can perform various illuminations.
  • FIGS. Such a conventional switch will be described with reference to FIGS. Note that these drawings are partially shown in enlarged dimensions for easy understanding of the configuration.
  • FIG. 5 is a cross-sectional view of a conventional switch.
  • FIG. 6 is a plan view of a conventional switch.
  • the cover sheet 1 is a film-like and light-transmitting cover sheet.
  • the pressing body 2 is a light-transmitting pressing body made of an insulating resin.
  • a plurality of pressing bodies 2 are affixed to the upper surface of the cover sheet 1 at predetermined intervals.
  • the dark color layer 3 is a dark color layer such as black or dark brown, and covers the upper and side surfaces of the plurality of pressing bodies 2 and the upper surface of the cover sheet 1.
  • the display unit 4 is a portion of the dark color layer 3 cut out in a shape such as a number, a character, or a symbol.
  • a plurality of display parts 4 are formed on the upper surface of the pressing body 2. For example, a display portion 4A indicating numbers and a display portion 4B indicating characters are formed on the upper surface of the pressing body 2A.
  • the hard coat layer 5 is a light transmissive hard coat layer and covers the upper surface of the dark color layer 3.
  • the key sheet 6 includes a cover sheet 1, a plurality of pressing bodies 2, dark color layers 3 (a plurality of display units 4), and a hard coat layer 5.
  • the base material 7 is a film-like and light-transmitting base material.
  • the light emitting part 8 is an uneven part formed on the lower surface of the base material 7.
  • the cutout portion 9 is a cutout portion formed in a substantially strip shape in the base material 7.
  • a plurality of light emitting portions 8 are formed on the lower surface of the base material 7.
  • a plurality of notches 9 are formed in the base material 7.
  • the notch portion 9 is disposed immediately above the light emitting portions 8. For example, a notch portion 9A is disposed immediately above the light emitting portions 8A and 8B.
  • a notch portion 9B is disposed immediately above the light emitting portions 8B and 8C.
  • the light guide sheet 10 includes a base material 7 and a plurality of light emitting units 8.
  • the light guide sheet 10 is attached to the lower surface of the key sheet 6.
  • a light emitting unit 8 is disposed directly below the display unit 4.
  • a light emitting unit 8A is disposed directly below the display unit 4A.
  • a light emitting unit 8B is arranged directly below the display unit 4B.
  • the base sheet 11 is a film-like and light-transmitting base sheet.
  • the movable contact 12 is a substantially dome-shaped movable contact made of a conductive metal thin plate.
  • the top of the dome of the base sheet 11 is attached to the lower surface of the light guide sheet 10 with an adhesive (not shown).
  • a plurality of movable contacts 12 are attached to the lower surface of the base sheet 11.
  • a movable contact 12 is disposed directly below the pressing body 2.
  • the movable contact body 13 includes a key sheet 6, a light guide sheet 10, a base sheet 11, and a plurality of movable contacts 12.
  • the wiring board 14 is a film-like wiring board or a plate-like wiring board.
  • a plurality of wiring patterns (not shown) are formed on the upper and lower surfaces of the wiring substrate 14.
  • the fixed contact 15 includes a substantially circular center fixed contact 15A and a substantially horseshoe-shaped or substantially ring-shaped outer fixed contact 15B surrounding the center fixed contact 15A.
  • a plurality of fixed contacts 15 are formed on the upper surface of the wiring board 14.
  • the movable contact body 13 is stuck on the upper surface of the wiring board 14.
  • the outer periphery of the movable contact 12 is placed on the outer fixed contact 15B.
  • the center of the lower surface of the movable contact 12 faces the central fixed contact 15A with a predetermined gap.
  • the light emitting element 16 is a light emitting element such as a light emitting diode.
  • a plurality of light emitting elements 16 are mounted on the upper surface of the wiring board 14.
  • the light emitting element 16 is disposed on the side of the light emitting unit 8.
  • the light emitting element 16A is disposed on the side of the light emitting unit 8A.
  • a light emitting element 16B is disposed on the side of the light emitting unit 8B.
  • the light emitting surfaces of the light emitting elements 16 ⁇ / b> A and 16 ⁇ / b> B are directed to the end surface of the base material 7.
  • the conventional switch includes a movable contact body 13, a wiring board 14, and a plurality of light emitting elements 16.
  • the switch configured in this manner is attached to the operation unit of an electronic device such as a mobile phone.
  • a plurality of fixed contacts 15 central fixed contact 15A or outer fixed contact 15B
  • a plurality of light emitting elements 16 are connected to an electronic circuit (not shown) of an electronic device via a wiring pattern or the like.
  • the movable contact 12 is elastically recovered in an approximately dome shape by the elastic force, and the center of the lower surface of the movable contact 12 is separated from the central fixed contact 15A. As a result, the central fixed contact 15A is electrically disconnected from the outer fixed contact 15B.
  • the plurality of light emitting elements 16 When power is supplied to the plurality of light emitting elements 16 from the electronic circuit of the electronic device, the plurality of light emitting elements 16 emit light. The light of the light emitting element 16 enters the light guide sheet 10 from the end face of the base material 7 and proceeds inward while reflecting the base material 7.
  • this light is diffused or reflected by the light emitting unit 8 to illuminate the display unit 4 from below. Thereby, even when the surroundings are dark, numbers, characters, symbols, or the like formed on the display unit 4 can be identified, and the operation unit can be easily operated.
  • the conventional switch is configured to achieve the following.
  • the pressing body 2 When the pressing body 2 is pressed, the light guide sheet 10 and the base sheet 11 are pressed. At this time, the movable contact 12 is elastically deformed, and the fixed contact 15 is electrically connected and separated.
  • light of the light emitting element 16 enters the light guide sheet 10 from the end face of the base material 7, and the light emitting unit 8 emits light.
  • Light from the light emitting unit 8 enters the cover sheet 1.
  • the light that has entered the cover sheet 1 is diffused in the cover sheet 1 and enters the pressing body 2.
  • the display unit 4 disposed on the upper surface of the pressing body 2 is illuminated by the light incident on the pressing body 2.
  • the cutout portion 9A arranged immediately above the light emitting portions 8A and 8B blocks light traveling from one of the light emitting portions 8A and 8B to the other in the base material 7. This prevents the light from the light emitting portion 8A and the light from the light emitting portion 8B from being mixed in the base material 7. Furthermore, light from the light emitting portion 8A is prevented from leaking toward the light emitting portion 8B through the inside of the base material 7. Similarly, light from the light emitting unit 8B is prevented from leaking toward the light emitting unit 8A through the base material 7.
  • the cut-out portions 9 prevent light from the plurality of light emitting portions 8 from being mixed in the base material 7 and leaking toward the other light emitting portions 8 through the base material 7.
  • Patent Document 1 is known as prior art document information related to the invention of this application.
  • the light emission color of the light emitting element 16A is orange
  • the light emission color of the light emitting element 16B is green.
  • the light emitting unit 8A emits orange light
  • the light emitting unit 8B emits green light.
  • light from the light emitting unit 8A (orange light) and light from the light emitting unit 8B (green light) enter the cover sheet 1.
  • the light from the light emitting portion 8A (orange light) and the light from the light emitting portion 8B (green light) incident on the cover sheet 1 are mixed in the cover sheet 1, and the display portions 4A and 4B are mixed in orange and green. Illuminated by.
  • the light emitting part 8B does not emit light and only the light emitting element 16A emits light
  • the light emitting part 8B does not emit light
  • only the light emitting part 8A emits orange light. Accordingly, only the light (orange light) from the light emitting unit 8A enters the cover sheet 1.
  • the light (orange light) incident on the cover sheet 1 from the light emitting section 8A travels through the cover sheet 1 and leaks toward the display section 4B, and the display section 4B that is not normally illuminated is also lightly illuminated in orange.
  • An object of the present invention is to solve such a conventional problem, and to provide a key sheet capable of preventing light mixing or light leakage and capable of various illumination, and a movable contact body using the key sheet. To do.
  • the present invention has the following configuration.
  • a light guide sheet provided with an uneven light emitting part and a substantially strip-shaped dark shade part on the lower surface of the key sheet is provided below the display part of the key sheet.
  • a movable contact made of a conductive metal thin plate is mounted on the lower surface of the light guide sheet below the key sheet pressing body.
  • the light shielding portion of the key sheet blocks light traveling in the cover sheet toward the other display portions. This prevents light incident on the cover sheet from being mixed in the cover sheet or leaking to other display units. Further, the light shielding portion of the light guide sheet blocks light traveling in the base material toward the other light emitting portions. This prevents light from the light emitting part from being mixed in the base material or leaking to other light emitting parts. As a result, it is possible to prevent the display unit from being illuminated in a state where light mixing or light leakage occurs. Accordingly, it is possible to realize a key sheet that is easy to see and can be illuminated in various ways, and a movable contact body using the key sheet.
  • FIG. 1 is a cross-sectional view of a movable contact body according to an embodiment of the present invention.
  • FIG. 2A is a plan view of the movable contact body according to the embodiment of the present invention.
  • FIG. 2B is a plan view of the movable contact body according to the embodiment of the present invention.
  • FIG. 3 is a sectional view of a switch using the movable contact body according to the embodiment of the present invention.
  • FIG. 4 is a cross-sectional view of a key sheet according to another embodiment of the present invention.
  • FIG. 5 is a cross-sectional view of a conventional switch.
  • FIG. 6 is a plan view of a conventional switch.
  • FIG. 1 is a cross-sectional view of a movable contact body according to an embodiment of the present invention.
  • 2A and 2B are plan views of the movable contact body according to the embodiment of the present invention.
  • the cover sheet 21 is a film-like light-transmitting cover sheet, and is made of polyurethane, silicone rubber, polystyrene, polycarbonate, or the like, and has flexibility. is doing.
  • the pressing body 22 is a light-transmitting pressing body made of insulating resin, and is made of polycarbonate or acrylic.
  • the dark color layer 23 is a dark color layer such as black or dark brown.
  • a dark color layer 23 is formed on the upper surface of the cover sheet 21 by applying dark paint at predetermined intervals by screen printing or spraying.
  • a plurality of pressing bodies 22 are attached to the upper surface of the dark color layer 23 with an adhesive (not shown) such as acrylic or silicone.
  • the display unit 24 is a part of the dark color layer 23 cut out in a shape such as a number, a character, or a symbol.
  • a plurality of display portions 24 are formed on the lower surface of the pressing body 22.
  • a display unit 24A indicating numbers and a display unit 24B indicating characters are formed on the lower surface of the pressing body 22A.
  • the light-shielding part 25 is a part of the cover sheet 21 that has a dark color such as black or dark blue. In the cover sheet 21, a plurality of light shielding portions 25 are formed.
  • the light shielding unit 25 is not disposed directly below the display unit 24 but is disposed immediately below the display units 24. For example, as shown in FIG. 2A, a light shielding unit 25A is arranged immediately below the display units 24A and 24B. A light shielding part 25B is arranged immediately below the display parts 24B and 24C. That is, the light shielding part 25 is formed in the cover sheet 21 excluding the part directly below the display part 24. Note that a space of about 0.5 mm is provided between a portion such as a number, a character, or a symbol formed on the display unit 24 and the light shielding unit 25.
  • the hard coat layer 26 is a light-transmitting hard coat layer made of insulating resin, made of acrylic or the like, and covers the top and side surfaces of the plurality of pressing bodies 22.
  • the key sheet 27 includes a cover sheet 21, a plurality of pressing bodies 22, a dark color layer 23 (a plurality of display portions 24), and a hard coat layer 26.
  • the base material 31 is a film-like and light-transmitting base material, and is made of polyurethane, silicone rubber, polystyrene, polycarbonate, or the like, and has flexibility.
  • the light emitting part 32 is an uneven part such as white or milky white.
  • a plurality of light emitting portions 32 are formed on the lower surface of the base material 31 by printing polyester or epoxy in a dot shape.
  • the light-shielding portion 33 is a portion of the base material 31 that has a dark color such as black or dark blue.
  • the shape of the light-shielding portion 33 is a substantially band shape.
  • a plurality of light shielding portions 33 are formed in the base material 31.
  • the light shielding unit 33 is not disposed immediately above the light emitting unit 32 but is disposed immediately above the light emitting units 32.
  • a light shielding part 33A is arranged immediately above the light emitting parts 32A and 32B.
  • a light shielding part 33B is disposed immediately above the light emitting parts 32B and 32C.
  • the light guide sheet 34 includes a base material 31 and a plurality of light emitting units 32.
  • a light guide sheet 34 is attached to the lower surface of the key sheet 27.
  • a light emitting unit 32 is disposed directly below the display unit 24.
  • a light shielding portion 33 is disposed immediately below the display portions 24.
  • a light emitting unit 32A is disposed directly below the display unit 24A.
  • a light emitting unit 32B is disposed directly below the display unit 24B.
  • a light emitting unit 32C is disposed directly below the display unit 24C.
  • a light shielding part 33A is arranged immediately below the display parts 24A and 24B.
  • a light shielding part 33B is arranged immediately below the display parts 24B and 24C.
  • the base sheet 11 is a film-like and light-transmitting base sheet, and is made of polyethylene terephthalate or polycarbonate and has flexibility.
  • the movable contact 12 is a substantially dome-shaped movable contact made of a conductive metal thin plate, and is made of copper alloy or steel.
  • a plurality of movable contacts 12 are attached to the lower surface of the base sheet 11. Furthermore, a film-like separator 36 is attached to the lower surface of the base sheet 11.
  • the separator 36 is made of polyethylene terephthalate or the like and covers the entire lower surface of the base sheet 11. The lower surface of the movable contact 12 is protected by the separator 36 so that dust or the like does not adhere to the lower surface of the movable contact 12 during storage and transportation.
  • a protrusion 35 made of insulating resin is provided on the upper surface of the base sheet 11 by printing or pasting.
  • the protrusion 35 is disposed above the center of the movable contact 12.
  • the protrusion 35 has a diameter of about 0.5 to 2 mm and a height of about 0.1 to 0.3 mm.
  • An adhesive (not shown) such as acrylic or silicone is applied to the upper surface of the protrusion 35.
  • the base sheet 11 is affixed to the lower surface of the light guide sheet 34 via the protrusions 35.
  • the movable contact 12 is disposed directly below the pressing body 22.
  • the movable contact body 37 includes a key sheet 27, a light guide sheet 34, a base sheet 11, and a plurality of movable contacts 12.
  • FIG. 3 is a sectional view of a switch using the movable contact body 37 according to the embodiment of the present invention.
  • the wiring board 14 is a film-like wiring board made of polyethylene terephthalate or polycarbonate, or a plate-like wiring board made of paper phenol or glass-filled epoxy.
  • a plurality of wiring patterns are formed on the upper and lower surfaces of the wiring substrate 14 by copper foil or the like.
  • the fixed contact 15 includes a substantially circular center fixed contact 15A and a substantially horseshoe-shaped or ring-shaped outer fixed contact 15B surrounding the center fixed contact 15A.
  • a plurality of fixed contacts 15 are formed on the upper surface of the wiring board 14 from copper, carbon, or the like.
  • the movable contact body 37 from which the separator 36 is peeled off is attached to the upper surface of the wiring board 14.
  • the outer periphery of the movable contact 12 is placed on the outer fixed contact 15B.
  • the center of the lower surface of the movable contact 12 faces the central fixed contact 15A with a predetermined gap.
  • the light emitting element 16 is a light emitting element such as a light emitting diode.
  • a plurality of light emitting elements 16 are mounted on the upper surface of the wiring board 14.
  • the light emitting element 16 is disposed on the side of the light emitting unit 32.
  • the light emitting element 16A is arranged on the side of the light emitting unit 32A.
  • a light emitting element 16B is disposed on the side of the light emitting unit 32B.
  • the light emitting surfaces of the light emitting elements 16 ⁇ / b> A and 16 ⁇ / b> B are directed to the end surface of the base material 31.
  • the switch according to the present embodiment includes a movable contact body 37, a wiring board 14, and a plurality of light emitting elements 16.
  • the switch configured in this manner is attached to the operation unit of an electronic device such as a mobile phone.
  • a plurality of fixed contacts 15 central fixed contact 15A or outer fixed contact 15B
  • a plurality of light emitting elements 16 are connected to an electronic circuit (not shown) of an electronic device via a wiring pattern or the like.
  • the movable contact 12 is elastically restored to an approximately dome shape by the elastic force, and the center of the lower surface of the movable contact 12 is separated from the central fixed contact 15A. As a result, the central fixed contact 15A is electrically disconnected from the outer fixed contact 15B.
  • the plurality of light emitting elements 16 emit light.
  • the light of the light emitting element 16 enters the light guide sheet 34 from the end face of the base material 31, and proceeds inward while reflecting inside the base material 31.
  • this light is diffused or reflected by the light emitting unit 32 to illuminate the display unit 24 from below. Thereby, even when the surroundings are dark, numbers, characters, symbols, or the like formed on the display unit 24 can be identified, and the operation unit can be easily operated.
  • the switch according to the embodiment of the present invention is configured to achieve the following.
  • the pressing body 22 When the pressing body 22 is pressed, the light guide sheet 34 and the base sheet 11 are pressed. At this time, the movable contact 12 is elastically deformed, and the fixed contact 15 is electrically connected and separated.
  • light of the light emitting element 16 enters the light guide sheet 34 from the end face of the base material 31, and the light emitting unit 32 emits light.
  • Light from the light emitting unit 32 enters the cover sheet 21.
  • the display unit 24 disposed on the lower surface of the pressing body 22 is illuminated by the light incident on the cover sheet 21.
  • the light shielding part 33A disposed immediately above the light emitting parts 32A and 32B blocks light traveling from one of the light emitting parts 32A and 32B to the other in the base material 31. This prevents the light from the light emitting unit 32A and the light from the light emitting unit 32B from being mixed in the base material 31. Furthermore, light from the light emitting unit 32A is prevented from leaking toward the light emitting unit 32B through the inside of the base material 31. Similarly, light from the light emitting unit 32B is prevented from leaking toward the light emitting unit 32A through the base material 31.
  • the light shielding unit 25A arranged immediately below the display units 24A and 24B blocks light traveling from one of the display units 24A and 24B to the other in the cover sheet 21. This prevents light from the light emitting unit 32A and light from the light emitting unit 32B from being mixed in the cover sheet 21. Further, the light from the light emitting unit 32A is prevented from leaking toward the display unit 24B through the cover sheet 21. Similarly, light from the light emitting portion 32B is prevented from leaking toward the display portion 24A through the cover sheet 21.
  • the light emission color of the light emitting element 16A is orange
  • the light emission color of the light emitting element 16B is green.
  • the light emitting unit 32A emits orange light
  • the light emitting unit 32B emits green light.
  • the light from the light emitting portions 32A and 32B enters the cover sheet 21 without being mixed in the base material 31 by the light shielding portion 33A.
  • orange light enters the cover sheet 21 from the light emitting portion 32A.
  • Green light enters the cover sheet 21 from the light emitting unit 32B.
  • the light incident on the cover sheet 21 from the light emitting units 32A and 32B illuminates the display units 24A and 24B without being mixed in the cover sheet 21 by the light shielding unit 25A. At this time, the display unit 24A is illuminated in orange. The display unit 24B is illuminated in green.
  • the light emitting element 16A does not emit light and only the light emitting element 16B emits light, the light emitting part 32A does not emit light, and only the light emitting part 32B emits green light.
  • the light from the light emitting unit 32B is incident on the cover sheet 21 through the base material 31 without leaking to the light emitting unit 32A by the light shielding unit 33A.
  • orange light enters the cover sheet 21 only from the light emitting unit 32B. Orange light does not enter the cover sheet 21 from the light emitting portion 32A.
  • the light that has entered the cover sheet 21 from the light emitting unit 32B is transmitted through the cover sheet 21 by the light shielding unit 25A, and illuminates only the display unit 24B without leaking toward the display unit 24A. At this time, only the display unit 24B is illuminated in green. The display unit 24A is not brightly illuminated.
  • the switch according to the present embodiment is easy to see and can perform various illuminations.
  • the light shielding portion 25 disposed immediately below the display portions 24 is formed in the cover sheet 21.
  • positioned just between the light emission parts 32 is formed. This prevents the display unit 24 from being illuminated in a state where light mixing or light leakage occurs. As a result, it is possible to obtain a key sheet 27 that is easy to see and capable of various illumination and a movable contact body 37 using the key sheet 27.
  • the upper surface of the base sheet 11 is provided with the protruding portion 35 disposed above the center of the movable contact 12.
  • the light shielding part 25 can be formed relatively easily by the following (Method 1).
  • the light shielding portion 25 can also be formed by the following (Method 2).
  • the light shielding part 33 can be formed by the same method as the light shielding part 25.
  • Method 1 An ink in which a dark dye is dispersed in a solvent in which the dark dye is dissolved is sprayed on the surface of the cover sheet 21 by an inkjet method or the like.
  • the cover sheet 21 is heated at a predetermined temperature for a predetermined time.
  • an ink in which an azo dye is dispersed in a solvent such as acetone or cyclohexanone may be used.
  • silicone rubber is used for the cover sheet 21
  • an ink in which an oil-soluble metal-containing dye is dispersed in gasoline or benzene may be used.
  • polycarbonate is used for the cover sheet 21
  • an ink in which an azo dye is dispersed in toluene or xylene may be used.
  • Method 2 An ink obtained by adding a resin such as acrylic or phenoxy to the above solvent is applied to the surface of the cover sheet 21 by screen printing or the like. The cover sheet 21 is heated to allow the dark dye to penetrate into the cover sheet 21.
  • a resin such as acrylic or phenoxy
  • the plurality of light shielding portions 25 can be simultaneously formed by ink jet or screen printing when the key sheet 27 is manufactured.
  • the plurality of light shielding portions 33 can also be simultaneously formed by inkjet or screen printing when the light guide sheet 34 is manufactured. For this reason, even when the number of light shielding portions 25 and 33 increases, the manufacturing time does not increase. Further, unlike the notch portions described in the background art, the light shielding portions 25 and 33 do not impair the elastic deformation of the movable contact 12. For this reason, a favorable operation feeling can be obtained.
  • the light shielding part 25 may be formed in a substantially strip shape, for example, similarly to the light shielding part 33.
  • the light shielding unit 25 may be formed in a substantially frame shape so as to surround the display unit 24 and the like.
  • the light-shielding portion 25 is formed in the cover sheet 21 excluding the portion directly below the plurality of display portions 24. Thereby, it is possible to prevent light from mixing in the cover sheet 21 or light from leaking. Further, the light from the light emitting unit 32 is absorbed by the light shielding unit 25, so that the light from the light emitting unit 32 is reflected by a gap between the base material 31 and the cover sheet 21 and the light leaks to unnecessary portions. Can be prevented.
  • a dark color layer 23 may be formed on the entire upper surface of the cover sheet 21. Furthermore, the upper surface and side surfaces of the plurality of pressing bodies 22 and the upper surface of the cover sheet 21 may be covered with the hard coat layer 26.
  • the lower surface of the cover sheet 21, in particular, the portion that contacts the upper surface of the light guide sheet 34 may be formed in a fine uneven shape. This makes it easier for the cover sheet 21 to be in close contact with the light guide sheet 34 during the pressing operation. Further, it is possible to prevent elastic deformation of the movable contact 12 and to perform a pressing operation with a good operation feeling.
  • the light emitting element 16 a light emitting element emitting light in white, blue, red, or the like may be used instead of an element emitting light in orange or green. Accordingly, the display unit 24 can be illuminated with various colors such as white, blue, or red.
  • a plurality of light emitting portions 32 may be formed on the upper surface of the base material 31 instead of the lower surface of the base material 31. Accordingly, the light emitting section 32 can be formed by various methods such as sticking, ink jet, laser processing, press processing, or molding processing in addition to printing.
  • the base sheet 11 may be omitted from the movable contact body 37, and the plurality of movable contacts 12 may be directly attached to the lower surface of the base material 31. Thereby, the total number of components can be reduced, and the movable contact body 37 or the switch using the movable contact body 37 can be formed more simply and inexpensively.
  • the key sheet according to the present invention and the movable contact body using the key sheet are those in which light mixing or light leakage is prevented and various illuminations are possible, mainly for operation of various electronic devices. Useful.

Abstract

A key sheet (27) comprises a cover sheet (21), pressing bodies (22), and a plurality of display sections (24). The plurality of display sections (24) are arranged on the upper face of the cover sheet (21). The pressing bodies (22) are arranged above the plurality of display sections (24). Light blocking sections (25) are formed within the cover sheet (21). The light blocking sections (25) are arranged right below and between the display sections (24). A light-guiding sheet (34) is arranged at the underside of the key sheet (27). The light-guiding sheet (34) comprises a base material (31) and a plurality of light-emitting units (32). The plurality of light-emitting units (32) are arranged at the underside of the base material (31). Light blocking sections (33) are formed within the base material (31). The light blocking sections (33) are arranged right above and between the light-emitting units (32).

Description

キーシート及びこれを用いた可動接点体Key sheet and movable contact body using the same
　本発明は、主に各種電子機器の操作部に使用されるキーシート及びこれを用いた可動接点体に関するものである。 The present invention relates to a key sheet mainly used for an operation unit of various electronic devices and a movable contact body using the key sheet.
　近年、各種電子機器、特に、携帯電話または電子カメラ等の携帯端末機器においては、周囲が暗い場合でも、発光ダイオードまたはＥＬ素子等を発光させて操作部の照光を行うことで、操作部の識別と操作が容易に行えるものが増えている。これに伴い、これらの機器の操作部に用いられるスイッチに、使い易く多様な照光を行えるものが求められている。 In recent years, in various electronic devices, particularly mobile terminal devices such as mobile phones or electronic cameras, even when the surroundings are dark, the operation unit is identified by emitting light from a light emitting diode or EL element. More and more can be operated easily. Along with this, there is a demand for switches that can be used in the operation unit of these devices that are easy to use and can perform various illuminations.
　このような従来のスイッチについて、図５及び図６を用いて説明する。なお、これらの図面は、構成を判り易くするために、部分的に拡大寸法で表されている。 Such a conventional switch will be described with reference to FIGS. Note that these drawings are partially shown in enlarged dimensions for easy understanding of the configuration.
　図５は、従来のスイッチの断面図である。図６は、従来のスイッチの平面図である。 FIG. 5 is a cross-sectional view of a conventional switch. FIG. 6 is a plan view of a conventional switch.
　図５、図６に示すように、カバーシート１は、フィルム状で光透過性のカバーシートである。押圧体２は、絶縁樹脂製で光透過性の押圧体である。カバーシート１の上面には、複数の押圧体２が所定間隔で貼付されている。 As shown in FIGS. 5 and 6, the cover sheet 1 is a film-like and light-transmitting cover sheet. The pressing body 2 is a light-transmitting pressing body made of an insulating resin. A plurality of pressing bodies 2 are affixed to the upper surface of the cover sheet 1 at predetermined intervals.
　暗色層３は、黒色または暗褐色等の暗色層であり、複数の押圧体２の上面および側面とカバーシート１の上面とを覆っている。表示部４は、数字、文字、または記号等の形状にくり抜かれた暗色層３の部分である。押圧体２の上面には、複数の表示部４が形成されている。例えば、押圧体２Ａの上面には、数字を示す表示部４Ａと、文字を示す表示部４Ｂとが形成されている。 The dark color layer 3 is a dark color layer such as black or dark brown, and covers the upper and side surfaces of the plurality of pressing bodies 2 and the upper surface of the cover sheet 1. The display unit 4 is a portion of the dark color layer 3 cut out in a shape such as a number, a character, or a symbol. A plurality of display parts 4 are formed on the upper surface of the pressing body 2. For example, a display portion 4A indicating numbers and a display portion 4B indicating characters are formed on the upper surface of the pressing body 2A.
　ハードコート層５は、光透過性のハードコート層であり、暗色層３の上面を覆っている。キーシート６は、カバーシート１と、複数の押圧体２と、暗色層３（複数の表示部４）と、ハードコート層５とで構成されている。 The hard coat layer 5 is a light transmissive hard coat layer and covers the upper surface of the dark color layer 3. The key sheet 6 includes a cover sheet 1, a plurality of pressing bodies 2, dark color layers 3 (a plurality of display units 4), and a hard coat layer 5.
　基材７は、フィルム状で光透過性の基材である。発光部８は、基材７の下面に形成された凹凸部である。切欠部９は、基材７内に略帯状に形成された切欠部である。基材７の下面には、複数の発光部８が形成されている。基材７内には、複数の切欠部９が形成されている。切欠部９は、発光部８同士の間の直上に配置されている。例えば、発光部８Ａ，８Ｂの間の直上には、切欠部９Ａが配置されている。発光部８Ｂ，８Ｃの間の直上には、切欠部９Ｂが配置されている。導光シート１０は、基材７と、複数の発光部８とで構成されている。 The base material 7 is a film-like and light-transmitting base material. The light emitting part 8 is an uneven part formed on the lower surface of the base material 7. The cutout portion 9 is a cutout portion formed in a substantially strip shape in the base material 7. A plurality of light emitting portions 8 are formed on the lower surface of the base material 7. A plurality of notches 9 are formed in the base material 7. The notch portion 9 is disposed immediately above the light emitting portions 8. For example, a notch portion 9A is disposed immediately above the light emitting portions 8A and 8B. A notch portion 9B is disposed immediately above the light emitting portions 8B and 8C. The light guide sheet 10 includes a base material 7 and a plurality of light emitting units 8.
　キーシート６の下面には、導光シート１０が貼付されている。表示部４の真下には、発光部８が配置されている。例えば、表示部４Ａの真下には、発光部８Ａが配置されている。表示部４Ｂの真下には、発光部８Ｂが配置されている。 The light guide sheet 10 is attached to the lower surface of the key sheet 6. A light emitting unit 8 is disposed directly below the display unit 4. For example, a light emitting unit 8A is disposed directly below the display unit 4A. A light emitting unit 8B is arranged directly below the display unit 4B.
　ベースシート１１は、フィルム状で光透過性のベースシートである。可動接点１２は、略ドーム状で導電金属薄板製の可動接点である。導光シート１０の下面には、接着剤（図示せず）によって、ベースシート１１のドーム頂上が貼付されている。ベースシート１１の下面には、複数の可動接点１２が貼付されている。押圧体２の真下には、可動接点１２が配置されている。可動接点体１３は、キーシート６と、導光シート１０と、ベースシート１１と、複数の可動接点１２とで構成されている。 The base sheet 11 is a film-like and light-transmitting base sheet. The movable contact 12 is a substantially dome-shaped movable contact made of a conductive metal thin plate. The top of the dome of the base sheet 11 is attached to the lower surface of the light guide sheet 10 with an adhesive (not shown). A plurality of movable contacts 12 are attached to the lower surface of the base sheet 11. A movable contact 12 is disposed directly below the pressing body 2. The movable contact body 13 includes a key sheet 6, a light guide sheet 10, a base sheet 11, and a plurality of movable contacts 12.
　配線基板１４は、フィルム状の配線基板または板状の配線基板である。配線基板１４の上下面には、複数の配線パターン（図示せず）が形成されている。固定接点１５は、略円形状の中央固定接点１５Ａと、中央固定接点１５Ａを囲む略馬蹄状または略リング状の外側固定接点１５Ｂとから構成されている。配線基板１４の上面には、複数の固定接点１５が形成されている。 The wiring board 14 is a film-like wiring board or a plate-like wiring board. A plurality of wiring patterns (not shown) are formed on the upper and lower surfaces of the wiring substrate 14. The fixed contact 15 includes a substantially circular center fixed contact 15A and a substantially horseshoe-shaped or substantially ring-shaped outer fixed contact 15B surrounding the center fixed contact 15A. A plurality of fixed contacts 15 are formed on the upper surface of the wiring board 14.
　配線基板１４の上面には、可動接点体１３が貼付されている。可動接点１２の外周が外側固定接点１５Ｂ上に載置されている。可動接点１２の下面中央が中央固定接点１５Ａと所定の間隙を空けて対向している。 The movable contact body 13 is stuck on the upper surface of the wiring board 14. The outer periphery of the movable contact 12 is placed on the outer fixed contact 15B. The center of the lower surface of the movable contact 12 faces the central fixed contact 15A with a predetermined gap.
　発光素子１６は、発光ダイオード等の発光素子である。配線基板１４の上面には、複数の発光素子１６が実装されている。発光素子１６は、発光部８の側方に配置されている。例えば、発光部８Ａの側方には、発光素子１６Ａが配置されている。発光部８Ｂの側方には、発光素子１６Ｂが配置されている。発光素子１６Ａ，１６Ｂの発光面が基材７の端面に向けられている。従来のスイッチは、可動接点体１３と、配線基板１４と、複数の発光素子１６とで構成されている。 The light emitting element 16 is a light emitting element such as a light emitting diode. A plurality of light emitting elements 16 are mounted on the upper surface of the wiring board 14. The light emitting element 16 is disposed on the side of the light emitting unit 8. For example, the light emitting element 16A is disposed on the side of the light emitting unit 8A. A light emitting element 16B is disposed on the side of the light emitting unit 8B. The light emitting surfaces of the light emitting elements 16 </ b> A and 16 </ b> B are directed to the end surface of the base material 7. The conventional switch includes a movable contact body 13, a wiring board 14, and a plurality of light emitting elements 16.
　このように構成されたスイッチは、携帯電話等の電子機器の操作部に装着される。複数の固定接点１５（中央固定接点１５Ａまたは外側固定接点１５Ｂ）、複数の発光素子１６が、配線パターン等を介して、電子機器の電子回路（図示せず）に接続される。 The switch configured in this manner is attached to the operation unit of an electronic device such as a mobile phone. A plurality of fixed contacts 15 (central fixed contact 15A or outer fixed contact 15B) and a plurality of light emitting elements 16 are connected to an electronic circuit (not shown) of an electronic device via a wiring pattern or the like.
　以上の構成において、押圧体２が下方へ押圧操作されると、この押圧体２の真下の導光シート１０の部分とベースシート１１の部分とが撓む。これに伴い、略ドーム状の可動接点１２の中央部が押圧される。さらに、この押圧体２に所定の押圧力が加わると、クリック感を伴って、可動接点１２が弾性変形して、可動接点１２の下面中央が中央固定接点１５Ａに接触する。これによって、中央固定接点１５Ａが、可動接点１２を介して、外側固定接点１５Ｂと電気的に接続される。 In the above configuration, when the pressing body 2 is pressed downward, the portion of the light guide sheet 10 and the portion of the base sheet 11 directly below the pressing body 2 are bent. Accordingly, the central portion of the substantially dome-shaped movable contact 12 is pressed. Furthermore, when a predetermined pressing force is applied to the pressing body 2, the movable contact 12 is elastically deformed with a click feeling, and the center of the lower surface of the movable contact 12 contacts the central fixed contact 15A. As a result, the central fixed contact 15 </ b> A is electrically connected to the outer fixed contact 15 </ b> B via the movable contact 12.
　また、この押圧体２への押圧力が解除されると、弾性力によって可動接点１２が略ドーム状に弾性回復し、可動接点１２の下面中央が中央固定接点１５Ａから離れる。これによって、中央固定接点１５Ａが、外側固定接点１５Ｂと電気的に切断される。 Further, when the pressing force to the pressing body 2 is released, the movable contact 12 is elastically recovered in an approximately dome shape by the elastic force, and the center of the lower surface of the movable contact 12 is separated from the central fixed contact 15A. As a result, the central fixed contact 15A is electrically disconnected from the outer fixed contact 15B.
　そして、このような固定接点１５の電気的接離に応じて、電子機器の様々な機能の切換えが行われる。電子機器の電子回路から複数の発光素子１６に電力が供給されると、複数の発光素子１６が発光する。発光素子１６の光が、基材７の端面から導光シート１０内に入射して、基材７内を反射しながら内方へ進む。 Then, according to the electrical contact / separation of the fixed contact 15, various functions of the electronic device are switched. When power is supplied to the plurality of light emitting elements 16 from the electronic circuit of the electronic device, the plurality of light emitting elements 16 emit light. The light of the light emitting element 16 enters the light guide sheet 10 from the end face of the base material 7 and proceeds inward while reflecting the base material 7.
　さらに、この光が、発光部８で拡散されたり、反射されたりして、表示部４を下方から照光する。これによって、周囲が暗い場合でも、表示部４に形成された数字、文字、または記号等を識別することができ、操作部の操作を容易に行うことができる。 Further, this light is diffused or reflected by the light emitting unit 8 to illuminate the display unit 4 from below. Thereby, even when the surroundings are dark, numbers, characters, symbols, or the like formed on the display unit 4 can be identified, and the operation unit can be easily operated.
　つまり、従来のスイッチは、次のことが達成されるように構成されている。押圧体２が押圧操作されることによって、導光シート１０とベースシート１１とが押圧される。このとき、可動接点１２が弾性変形して、固定接点１５の電気的接離が行われる。これに伴い、発光素子１６の光が基材７の端面から導光シート１０内に入射して、発光部８が発光する。発光部８からの光がカバーシート１内に入射する。カバーシート１内に入射した光が、カバーシート１内で拡散されて、押圧体２内に入射する。押圧体２内に入射した光によって、押圧体２の上面に配置された表示部４が照光される。 That is, the conventional switch is configured to achieve the following. When the pressing body 2 is pressed, the light guide sheet 10 and the base sheet 11 are pressed. At this time, the movable contact 12 is elastically deformed, and the fixed contact 15 is electrically connected and separated. Along with this, light of the light emitting element 16 enters the light guide sheet 10 from the end face of the base material 7, and the light emitting unit 8 emits light. Light from the light emitting unit 8 enters the cover sheet 1. The light that has entered the cover sheet 1 is diffused in the cover sheet 1 and enters the pressing body 2. The display unit 4 disposed on the upper surface of the pressing body 2 is illuminated by the light incident on the pressing body 2.
　ここで、発光部８Ａ，８Ｂの間の直上に配置された切欠部９Ａは、基材７内を発光部８Ａ，８Ｂのうちの一方から他方に進む光を遮断する。これによって、発光部８Ａからの光および発光部８Ｂからの光が基材７内で混ざることが防止される。さらに、発光部８Ａからの光が基材７内を伝って発光部８Ｂの方に漏れることが防止される。同様に、発光部８Ｂからの光が基材７内を伝って発光部８Ａの方に漏れることが防止される。 Here, the cutout portion 9A arranged immediately above the light emitting portions 8A and 8B blocks light traveling from one of the light emitting portions 8A and 8B to the other in the base material 7. This prevents the light from the light emitting portion 8A and the light from the light emitting portion 8B from being mixed in the base material 7. Furthermore, light from the light emitting portion 8A is prevented from leaking toward the light emitting portion 8B through the inside of the base material 7. Similarly, light from the light emitting unit 8B is prevented from leaking toward the light emitting unit 8A through the base material 7.
　すなわち、切欠部９によって、複数の発光部８からの光が、基材７内で混ざること、基材７内を伝って他の発光部８の方に漏れること等が防止される。 That is, the cut-out portions 9 prevent light from the plurality of light emitting portions 8 from being mixed in the base material 7 and leaking toward the other light emitting portions 8 through the base material 7.
　なお、この出願の発明に関連する先行技術文献情報としては、例えば、特許文献１が知られている。 For example, Patent Document 1 is known as prior art document information related to the invention of this application.
特開２０１０－２７５３５号公報JP 2010-27535 A
　しかしながら、上記従来のスイッチにおいては、カバーシート１内に入射した光が、カバーシート１内を伝って他の表示部４または他の押圧体２の方に漏れる。このため、表示部４が混色で照光される場合、本来なら照光されない表示部４までもが薄明るく照光される場合等が生じる。 However, in the conventional switch described above, light incident on the cover sheet 1 travels through the cover sheet 1 and leaks toward the other display unit 4 or the other pressing body 2. For this reason, when the display unit 4 is illuminated with mixed colors, the display unit 4 that is not originally illuminated may be lightly illuminated.
　例えば、発光素子１６Ａの発光色が橙色であり、発光素子１６Ｂの発光色が緑色であるとする。この場合において、発光素子１６Ａ，１６Ｂが発光すると、発光部８Ａが橙色に発光して、発光部８Ｂが緑色に発光する。これに伴い、発光部８Ａからの光（橙色の光）および発光部８Ｂからの光（緑色の光）がカバーシート１内に入射する。カバーシート１内に入射した発光部８Ａからの光（橙色の光）および発光部８Ｂからの光（緑色の光）がカバーシート１内で混ざり、表示部４Ａ，４Ｂが橙色と緑色との混色で照光される。 For example, assume that the light emission color of the light emitting element 16A is orange, and the light emission color of the light emitting element 16B is green. In this case, when the light emitting elements 16A and 16B emit light, the light emitting unit 8A emits orange light and the light emitting unit 8B emits green light. Accordingly, light from the light emitting unit 8A (orange light) and light from the light emitting unit 8B (green light) enter the cover sheet 1. The light from the light emitting portion 8A (orange light) and the light from the light emitting portion 8B (green light) incident on the cover sheet 1 are mixed in the cover sheet 1, and the display portions 4A and 4B are mixed in orange and green. Illuminated by.
　また、発光素子１６Ｂが発光せず、発光素子１６Ａのみが発光すると、発光部８Ｂが発光せずに、発光部８Ａのみが橙色に発光する。これに伴い、発光部８Ａからの光（橙色の光）のみがカバーシート１内に入射する。カバーシート１内に入射した発光部８Ａからの光（橙色の光）がカバーシート１内を伝って表示部４Ｂの方に漏れ、本来なら照光されない表示部４Ｂまでもが薄明るく橙色で照光される。 When the light emitting element 16B does not emit light and only the light emitting element 16A emits light, the light emitting part 8B does not emit light, and only the light emitting part 8A emits orange light. Accordingly, only the light (orange light) from the light emitting unit 8A enters the cover sheet 1. The light (orange light) incident on the cover sheet 1 from the light emitting section 8A travels through the cover sheet 1 and leaks toward the display section 4B, and the display section 4B that is not normally illuminated is also lightly illuminated in orange. The
　結果として、スイッチが見づらいものとなってしまうという課題がある。 As a result, there is a problem that the switch becomes difficult to see.
　本発明は、このような従来の課題を解決するものであり、光の混合または光の漏出を防ぎ、多様な照光が可能なキーシート及びこれを用いた可動接点体を提供することを目的とする。 An object of the present invention is to solve such a conventional problem, and to provide a key sheet capable of preventing light mixing or light leakage and capable of various illumination, and a movable contact body using the key sheet. To do.
　上記目的を達成するために本発明は、以下の構成を有するものである。 In order to achieve the above object, the present invention has the following configuration.
　本発明に係わるキーシートでは、フィルム状で光透過性のカバーシートと、前記カバーシート上面に装着された光透過性の押圧体と、前記押圧体下面と前記カバーシートの間に形成された複数の表示部からなり、前記複数の表示部の間の前記カバーシート内に、暗色の遮光部を設けたものである。 In the key sheet according to the present invention, a film-like light-transmitting cover sheet, a light-transmitting pressing body mounted on the upper surface of the cover sheet, and a plurality of layers formed between the lower surface of the pressing body and the cover sheet A dark-colored light-shielding portion is provided in the cover sheet between the plurality of display portions.
　また、本発明に係わる可動接点体では、上記のキーシート下面に、前記キーシートの表示部下方に凹凸状の発光部と、略帯状で暗色の遮光部が設けられた導光シートを配設すると共に、前記導光シート下面の前記キーシートの押圧体下方に、略ドーム状で導電金属薄板製の可動接点を装着したものである。 Further, in the movable contact body according to the present invention, a light guide sheet provided with an uneven light emitting part and a substantially strip-shaped dark shade part on the lower surface of the key sheet is provided below the display part of the key sheet. At the same time, a movable contact made of a conductive metal thin plate is mounted on the lower surface of the light guide sheet below the key sheet pressing body.
　本発明によれば、キーシートの遮光部は、カバーシート内を他の表示部の方に進む光を遮断する。これによって、カバーシート内に入射した光がカバーシート内で混ざったり、他の表示部の方に漏れたりすることが防止される。さらに、導光シートの遮光部は、基材内を他の発光部の方に進む光を遮断する。これによって、発光部からの光が基材内で混ざったり、他の発光部の方に漏れたりすることが防止される。結果として、光の混合または光の漏出等が生じた状態で表示部が照光されることが防止される。このことから、見易く、多様な照光が可能なキーシート及びこれを用いた可動接点体を実現することができる。 According to the present invention, the light shielding portion of the key sheet blocks light traveling in the cover sheet toward the other display portions. This prevents light incident on the cover sheet from being mixed in the cover sheet or leaking to other display units. Further, the light shielding portion of the light guide sheet blocks light traveling in the base material toward the other light emitting portions. This prevents light from the light emitting part from being mixed in the base material or leaking to other light emitting parts. As a result, it is possible to prevent the display unit from being illuminated in a state where light mixing or light leakage occurs. Accordingly, it is possible to realize a key sheet that is easy to see and can be illuminated in various ways, and a movable contact body using the key sheet.
図１は、本発明の実施の形態による可動接点体の断面図である。FIG. 1 is a cross-sectional view of a movable contact body according to an embodiment of the present invention. 図２Ａは、本発明の実施の形態による可動接点体の平面図である。FIG. 2A is a plan view of the movable contact body according to the embodiment of the present invention. 図２Ｂは、本発明の実施の形態による可動接点体の平面図である。FIG. 2B is a plan view of the movable contact body according to the embodiment of the present invention. 図３は、本発明の実施の形態による可動接点体を用いたスイッチの断面図である。FIG. 3 is a sectional view of a switch using the movable contact body according to the embodiment of the present invention. 図４は、本発明の他の実施の形態によるキーシートの断面図である。FIG. 4 is a cross-sectional view of a key sheet according to another embodiment of the present invention. 図５は、従来のスイッチの断面図である。FIG. 5 is a cross-sectional view of a conventional switch. 図６は、従来のスイッチの平面図である。FIG. 6 is a plan view of a conventional switch.
　以下、本発明の実施の形態について、図１～図４を用いて説明する。なお、これらの図面は、構成を判り易くするために、部分的に拡大寸法で表されている。また、背景技術で説明した構成と同一の構成については、同一の符号を付して、説明を簡略化する。 Hereinafter, embodiments of the present invention will be described with reference to FIGS. Note that these drawings are partially shown in enlarged dimensions for easy understanding of the configuration. Further, the same components as those described in the background art are denoted by the same reference numerals, and the description is simplified.
　（実施の形態）
　図１は、本発明の実施の形態による可動接点体の断面図である。図２Ａ、図２Ｂは、本発明の実施の形態による可動接点体の平面図である。 (Embodiment)
FIG. 1 is a cross-sectional view of a movable contact body according to an embodiment of the present invention. 2A and 2B are plan views of the movable contact body according to the embodiment of the present invention.
　図１、図２Ａ、図２Ｂに示すように、カバーシート２１は、フィルム状で光透過性のカバーシートであり、ポリウレタン、シリコーンゴム、ポリスチレン、またはポリカーボネート等でできており、可撓性を有している。 As shown in FIGS. 1, 2A, and 2B, the cover sheet 21 is a film-like light-transmitting cover sheet, and is made of polyurethane, silicone rubber, polystyrene, polycarbonate, or the like, and has flexibility. is doing.
　押圧体２２は、絶縁樹脂製で光透過性の押圧体であり、ポリカーボネートまたはアクリル等でできている。 The pressing body 22 is a light-transmitting pressing body made of insulating resin, and is made of polycarbonate or acrylic.
　暗色層２３は、黒色または暗褐色等の暗色層である。カバーシート２１の上面には、暗色の塗料をスクリーン印刷または噴霧等によって所定の間隔で塗布することで、暗色層２３が形成されている。暗色層２３の上面には、アクリルまたはシリコーン等の接着剤（図示せず）によって、複数の押圧体２２が貼付されている。 The dark color layer 23 is a dark color layer such as black or dark brown. A dark color layer 23 is formed on the upper surface of the cover sheet 21 by applying dark paint at predetermined intervals by screen printing or spraying. A plurality of pressing bodies 22 are attached to the upper surface of the dark color layer 23 with an adhesive (not shown) such as acrylic or silicone.
　表示部２４は、数字、文字、または記号等の形状にくり抜かれた暗色層２３の部分である。押圧体２２の下面には、複数の表示部２４が形成されている。例えば、押圧体２２Ａの下面には、数字を示す表示部２４Ａと、文字を示す表示部２４Ｂとが形成されている。 The display unit 24 is a part of the dark color layer 23 cut out in a shape such as a number, a character, or a symbol. A plurality of display portions 24 are formed on the lower surface of the pressing body 22. For example, a display unit 24A indicating numbers and a display unit 24B indicating characters are formed on the lower surface of the pressing body 22A.
　遮光部２５は、黒色または濃青色等の暗色にしたカバーシート２１の部分である。カバーシート２１内には、複数の遮光部２５が形成されている。遮光部２５は、表示部２４の直下に配置されず、表示部２４同士の間の直下に配置されている。例えば、図２Ａに示すように、表示部２４Ａ，２４Ｂの間の直下には、遮光部２５Ａが配置されている。表示部２４Ｂ，２４Ｃの間の直下には、遮光部２５Ｂが配置されている。すなわち、表示部２４の真下部分を除くカバーシート２１内には、遮光部２５が形成されている。なお、表示部２４に形成された数字、文字、または記号等の部分と、遮光部２５との間が０．５ｍｍ前後空けられている。 The light-shielding part 25 is a part of the cover sheet 21 that has a dark color such as black or dark blue. In the cover sheet 21, a plurality of light shielding portions 25 are formed. The light shielding unit 25 is not disposed directly below the display unit 24 but is disposed immediately below the display units 24. For example, as shown in FIG. 2A, a light shielding unit 25A is arranged immediately below the display units 24A and 24B. A light shielding part 25B is arranged immediately below the display parts 24B and 24C. That is, the light shielding part 25 is formed in the cover sheet 21 excluding the part directly below the display part 24. Note that a space of about 0.5 mm is provided between a portion such as a number, a character, or a symbol formed on the display unit 24 and the light shielding unit 25.
　ハードコート層２６は、絶縁樹脂製で光透過性のハードコート層であり、アクリル等でできており、複数の押圧体２２の上面および側面を覆っている。 The hard coat layer 26 is a light-transmitting hard coat layer made of insulating resin, made of acrylic or the like, and covers the top and side surfaces of the plurality of pressing bodies 22.
　キーシート２７は、カバーシート２１と、複数の押圧体２２と、暗色層２３（複数の表示部２４）と、ハードコート層２６とで構成されている。 The key sheet 27 includes a cover sheet 21, a plurality of pressing bodies 22, a dark color layer 23 (a plurality of display portions 24), and a hard coat layer 26.
　基材３１は、フィルム状で光透過性の基材であり、ポリウレタン、シリコーンゴム、ポリスチレン、またはポリカーボネート等でできており、可撓性を有している。 The base material 31 is a film-like and light-transmitting base material, and is made of polyurethane, silicone rubber, polystyrene, polycarbonate, or the like, and has flexibility.
　発光部３２は、白色または乳白色等の凹凸部である。基材３１の下面には、ポリエステルまたはエポキシ等をドット状に印刷することで、複数の発光部３２が形成されている。 The light emitting part 32 is an uneven part such as white or milky white. A plurality of light emitting portions 32 are formed on the lower surface of the base material 31 by printing polyester or epoxy in a dot shape.
　遮光部３３は、黒色または濃青色等の暗色にした基材３１の部分である。遮光部３３の形状が略帯状である。基材３１内には、複数の遮光部３３が形成されている。遮光部３３は、発光部３２の直上に配置されず、発光部３２同士の間の直上に配置されている。例えば、図２Ｂに示すように、発光部３２Ａ，３２Ｂの間の直上には、遮光部３３Ａが配置されている。発光部３２Ｂ，３２Ｃの間の直上には、遮光部３３Ｂが配置されている。 The light-shielding portion 33 is a portion of the base material 31 that has a dark color such as black or dark blue. The shape of the light-shielding portion 33 is a substantially band shape. A plurality of light shielding portions 33 are formed in the base material 31. The light shielding unit 33 is not disposed immediately above the light emitting unit 32 but is disposed immediately above the light emitting units 32. For example, as shown in FIG. 2B, a light shielding part 33A is arranged immediately above the light emitting parts 32A and 32B. A light shielding part 33B is disposed immediately above the light emitting parts 32B and 32C.
　導光シート３４は、基材３１と、複数の発光部３２とで構成されている。 The light guide sheet 34 includes a base material 31 and a plurality of light emitting units 32.
　キーシート２７の下面には、導光シート３４が貼付されている。表示部２４の真下には、発光部３２が配置されている。表示部２４同士の間の直下には、遮光部３３が配置されている。例えば、図１に示すように、表示部２４Ａの真下には、発光部３２Ａが配置されている。表示部２４Ｂの真下には、発光部３２Ｂが配置されている。表示部２４Ｃの真下には、発光部３２Ｃが配置されている。表示部２４Ａ，２４Ｂの間の直下には、遮光部３３Ａが配置されている。表示部２４Ｂ，２４Ｃの間の直下には、遮光部３３Ｂが配置されている。 A light guide sheet 34 is attached to the lower surface of the key sheet 27. A light emitting unit 32 is disposed directly below the display unit 24. A light shielding portion 33 is disposed immediately below the display portions 24. For example, as shown in FIG. 1, a light emitting unit 32A is disposed directly below the display unit 24A. A light emitting unit 32B is disposed directly below the display unit 24B. A light emitting unit 32C is disposed directly below the display unit 24C. A light shielding part 33A is arranged immediately below the display parts 24A and 24B. A light shielding part 33B is arranged immediately below the display parts 24B and 24C.
　ベースシート１１は、フィルム状で光透過性のベースシートであり、ポリエチレンテレフタレートまたはポリカーボネート等でできており、可撓性を有している。 The base sheet 11 is a film-like and light-transmitting base sheet, and is made of polyethylene terephthalate or polycarbonate and has flexibility.
　可動接点１２は、略ドーム状で導電金属薄板製の可動接点であり、銅合金または鋼等でできている。 The movable contact 12 is a substantially dome-shaped movable contact made of a conductive metal thin plate, and is made of copper alloy or steel.
　ベースシート１１の下面には、複数の可動接点１２が貼付されている。さらに、ベースシート１１の下面には、フィルム状のセパレータ３６が貼付されている。セパレータ３６は、ポリエチレンテレフタレート等でできており、ベースシート１１の下面全面を覆っている。保管と搬送時に可動接点１２の下面に塵埃等が付着しないように、セパレータ３６で可動接点１２の下面が保護されている。 A plurality of movable contacts 12 are attached to the lower surface of the base sheet 11. Furthermore, a film-like separator 36 is attached to the lower surface of the base sheet 11. The separator 36 is made of polyethylene terephthalate or the like and covers the entire lower surface of the base sheet 11. The lower surface of the movable contact 12 is protected by the separator 36 so that dust or the like does not adhere to the lower surface of the movable contact 12 during storage and transportation.
　ベースシート１１の上面には、印刷または貼付によって、絶縁樹脂製の突起部３５が設けられている。突起部３５は、可動接点１２の中央上方に配置されている。突起部３５の直径が０．５～２ｍｍ前後であり、その高さが０．１～０．３ｍｍ前後である。突起部３５の上面には、アクリルまたはシリコーン等の接着剤（図示せず）が塗布されている。導光シート３４の下面には、突起部３５を介して、ベースシート１１が貼付されている。押圧体２２の真下には、可動接点１２が配置されている。 A protrusion 35 made of insulating resin is provided on the upper surface of the base sheet 11 by printing or pasting. The protrusion 35 is disposed above the center of the movable contact 12. The protrusion 35 has a diameter of about 0.5 to 2 mm and a height of about 0.1 to 0.3 mm. An adhesive (not shown) such as acrylic or silicone is applied to the upper surface of the protrusion 35. The base sheet 11 is affixed to the lower surface of the light guide sheet 34 via the protrusions 35. The movable contact 12 is disposed directly below the pressing body 22.
　可動接点体３７は、キーシート２７と、導光シート３４と、ベースシート１１と、複数の可動接点１２とで構成されている。 The movable contact body 37 includes a key sheet 27, a light guide sheet 34, a base sheet 11, and a plurality of movable contacts 12.
　図３は、本発明の実施の形態による可動接点体３７を用いたスイッチの断面図である。 FIG. 3 is a sectional view of a switch using the movable contact body 37 according to the embodiment of the present invention.
　図３に示すように、配線基板１４は、ポリエチレンテレフタレートまたはポリカーボネート等でできたフィルム状の配線基板、あるいは紙フェノールまたはガラス入りエポキシ等でできた板状の配線基板である。配線基板１４の上下面には、銅箔等によって、複数の配線パターン（図示せず）が形成されている。 As shown in FIG. 3, the wiring board 14 is a film-like wiring board made of polyethylene terephthalate or polycarbonate, or a plate-like wiring board made of paper phenol or glass-filled epoxy. A plurality of wiring patterns (not shown) are formed on the upper and lower surfaces of the wiring substrate 14 by copper foil or the like.
　固定接点１５は、略円形状の中央固定接点１５Ａと、中央固定接点１５Ａを囲む略馬蹄状または略リング状の外側固定接点１５Ｂとから構成されている。配線基板１４の上面には、銅またはカーボン等によって、複数の固定接点１５が形成されている。 The fixed contact 15 includes a substantially circular center fixed contact 15A and a substantially horseshoe-shaped or ring-shaped outer fixed contact 15B surrounding the center fixed contact 15A. A plurality of fixed contacts 15 are formed on the upper surface of the wiring board 14 from copper, carbon, or the like.
　配線基板１４の上面には、セパレータ３６が剥離された可動接点体３７が貼付されている。可動接点１２の外周が外側固定接点１５Ｂ上に載置されている。可動接点１２の下面中央が中央固定接点１５Ａと所定の間隙を空けて対向している。 The movable contact body 37 from which the separator 36 is peeled off is attached to the upper surface of the wiring board 14. The outer periphery of the movable contact 12 is placed on the outer fixed contact 15B. The center of the lower surface of the movable contact 12 faces the central fixed contact 15A with a predetermined gap.
　発光素子１６は、発光ダイオード等の発光素子である。配線基板１４の上面には、複数の発光素子１６が実装されている。発光素子１６は、発光部３２の側方に配置されている。例えば、図２Ｂに示すように、発光部３２Ａの側方には、発光素子１６Ａが配置されている。発光部３２Ｂの側方には、発光素子１６Ｂが配置されている。発光素子１６Ａ，１６Ｂの発光面が基材３１の端面に向けられている。 The light emitting element 16 is a light emitting element such as a light emitting diode. A plurality of light emitting elements 16 are mounted on the upper surface of the wiring board 14. The light emitting element 16 is disposed on the side of the light emitting unit 32. For example, as shown in FIG. 2B, the light emitting element 16A is arranged on the side of the light emitting unit 32A. A light emitting element 16B is disposed on the side of the light emitting unit 32B. The light emitting surfaces of the light emitting elements 16 </ b> A and 16 </ b> B are directed to the end surface of the base material 31.
　本実施の形態によるスイッチは、可動接点体３７と、配線基板１４と、複数の発光素子１６とで構成されている。 The switch according to the present embodiment includes a movable contact body 37, a wiring board 14, and a plurality of light emitting elements 16.
　このように構成されたスイッチは、携帯電話等の電子機器の操作部に装着される。複数の固定接点１５（中央固定接点１５Ａまたは外側固定接点１５Ｂ）、複数の発光素子１６が、配線パターン等を介して、電子機器の電子回路（図示せず）に接続される。 The switch configured in this manner is attached to the operation unit of an electronic device such as a mobile phone. A plurality of fixed contacts 15 (central fixed contact 15A or outer fixed contact 15B) and a plurality of light emitting elements 16 are connected to an electronic circuit (not shown) of an electronic device via a wiring pattern or the like.
　以上の構成において、押圧体２２が下方へ押圧操作されると、この押圧体２２の真下のカバーシート２１の部分と導光シート３４の部分とが撓む。これに伴い、突起部３５とベースシート１１とを介して、導光シート３４の下面で、略ドーム状の可動接点１２の中央部が押圧される。さらに、この押圧体２２に所定の押圧力が加わると、クリック感を伴って、可動接点１２が弾性変形して、可動接点１２の下面中央が中央固定接点１５Ａに接触する。これによって、中央固定接点１５Ａが、可動接点１２を介して、外側固定接点１５Ｂと電気的に接続される。 In the above configuration, when the pressing body 22 is pressed downward, the portion of the cover sheet 21 and the portion of the light guide sheet 34 directly below the pressing body 22 are bent. Accordingly, the central portion of the substantially dome-shaped movable contact 12 is pressed on the lower surface of the light guide sheet 34 via the protrusion 35 and the base sheet 11. Further, when a predetermined pressing force is applied to the pressing body 22, the movable contact 12 is elastically deformed with a click feeling, and the center of the lower surface of the movable contact 12 contacts the central fixed contact 15A. As a result, the central fixed contact 15 </ b> A is electrically connected to the outer fixed contact 15 </ b> B via the movable contact 12.
　また、この押圧体２２への押圧力が解除されると、弾性力によって可動接点１２が略ドーム状に弾性回復し、可動接点１２の下面中央が中央固定接点１５Ａから離れる。これによって、中央固定接点１５Ａが、外側固定接点１５Ｂと電気的に切断される。 Further, when the pressing force to the pressing body 22 is released, the movable contact 12 is elastically restored to an approximately dome shape by the elastic force, and the center of the lower surface of the movable contact 12 is separated from the central fixed contact 15A. As a result, the central fixed contact 15A is electrically disconnected from the outer fixed contact 15B.
　そして、このような固定接点１５の電気的接離に応じて、電子機器の様々な機能の切換えが行われる。電子機器の電子回路から複数の発光素子１６に電力が供給されると、複数の発光素子１６が発光する。発光素子１６の光が、基材３１の端面から導光シート３４内に入射して、基材３１内を反射しながら内方へ進む。 Then, according to the electrical contact / separation of the fixed contact 15, various functions of the electronic device are switched. When power is supplied to the plurality of light emitting elements 16 from the electronic circuit of the electronic device, the plurality of light emitting elements 16 emit light. The light of the light emitting element 16 enters the light guide sheet 34 from the end face of the base material 31, and proceeds inward while reflecting inside the base material 31.
　さらに、この光が、発光部３２で拡散されたり、反射されたりして、表示部２４を下方から照光する。これによって、周囲が暗い場合でも、表示部２４に形成された数字、文字、または記号等を識別することができ、操作部の操作を容易に行うことができる。 Further, this light is diffused or reflected by the light emitting unit 32 to illuminate the display unit 24 from below. Thereby, even when the surroundings are dark, numbers, characters, symbols, or the like formed on the display unit 24 can be identified, and the operation unit can be easily operated.
　つまり、本発明の実施の形態によるスイッチは、次のことが達成されるように構成されている。押圧体２２が押圧操作されることによって、導光シート３４とベースシート１１とが押圧される。このとき、可動接点１２が弾性変形して、固定接点１５の電気的接離が行われる。これに伴い、発光素子１６の光が基材３１の端面から導光シート３４内に入射して、発光部３２が発光する。発光部３２からの光がカバーシート２１内に入射する。カバーシート２１内に入射した光によって、押圧体２２の下面に配置された表示部２４が照光される。 That is, the switch according to the embodiment of the present invention is configured to achieve the following. When the pressing body 22 is pressed, the light guide sheet 34 and the base sheet 11 are pressed. At this time, the movable contact 12 is elastically deformed, and the fixed contact 15 is electrically connected and separated. Along with this, light of the light emitting element 16 enters the light guide sheet 34 from the end face of the base material 31, and the light emitting unit 32 emits light. Light from the light emitting unit 32 enters the cover sheet 21. The display unit 24 disposed on the lower surface of the pressing body 22 is illuminated by the light incident on the cover sheet 21.
　ここで、発光部３２Ａ，３２Ｂの間の直上に配置された遮光部３３Ａは、基材３１内を発光部３２Ａ，３２Ｂのうちの一方から他方に進む光を遮断する。これによって、発光部３２Ａからの光および発光部３２Ｂからの光が基材３１内で混ざることが防止される。さらに、発光部３２Ａからの光が基材３１内を伝って発光部３２Ｂの方に漏れることが防止される。同様に、発光部３２Ｂからの光が基材３１内を伝って発光部３２Ａの方に漏れることが防止される。 Here, the light shielding part 33A disposed immediately above the light emitting parts 32A and 32B blocks light traveling from one of the light emitting parts 32A and 32B to the other in the base material 31. This prevents the light from the light emitting unit 32A and the light from the light emitting unit 32B from being mixed in the base material 31. Furthermore, light from the light emitting unit 32A is prevented from leaking toward the light emitting unit 32B through the inside of the base material 31. Similarly, light from the light emitting unit 32B is prevented from leaking toward the light emitting unit 32A through the base material 31.
　また、表示部２４Ａ，２４Ｂの間の直下に配置された遮光部２５Ａは、カバーシート２１内を表示部２４Ａ，２４Ｂのうちの一方から他方に進む光を遮断する。これによって、発光部３２Ａからの光および発光部３２Ｂからの光がカバーシート２１内で混ざることが防止される。さらに、発光部３２Ａからの光がカバーシート２１内を伝って表示部２４Ｂの方に漏れることが防止される。同様に、発光部３２Ｂからの光がカバーシート２１内を伝って表示部２４Ａの方に漏れることが防止される。 Further, the light shielding unit 25A arranged immediately below the display units 24A and 24B blocks light traveling from one of the display units 24A and 24B to the other in the cover sheet 21. This prevents light from the light emitting unit 32A and light from the light emitting unit 32B from being mixed in the cover sheet 21. Further, the light from the light emitting unit 32A is prevented from leaking toward the display unit 24B through the cover sheet 21. Similarly, light from the light emitting portion 32B is prevented from leaking toward the display portion 24A through the cover sheet 21.
　例えば、発光素子１６Ａの発光色が橙色であり、発光素子１６Ｂの発光色が緑色であるとする。この場合において、発光素子１６Ａ，１６Ｂが発光すると、発光部３２Ａが橙色に発光して、発光部３２Ｂが緑色に発光する。 For example, assume that the light emission color of the light emitting element 16A is orange, and the light emission color of the light emitting element 16B is green. In this case, when the light emitting elements 16A and 16B emit light, the light emitting unit 32A emits orange light, and the light emitting unit 32B emits green light.
　これに伴い、発光部３２Ａ，３２Ｂからの光は、遮光部３３Ａによって、基材３１内で混ざることなく、カバーシート２１内に入射する。このとき、発光部３２Ａの方から橙色の光がカバーシート２１内に入射する。発光部３２Ｂの方から緑色の光がカバーシート２１内に入射する。 Accordingly, the light from the light emitting portions 32A and 32B enters the cover sheet 21 without being mixed in the base material 31 by the light shielding portion 33A. At this time, orange light enters the cover sheet 21 from the light emitting portion 32A. Green light enters the cover sheet 21 from the light emitting unit 32B.
　さらに、発光部３２Ａ，３２Ｂからカバーシート２１内に入射した光は、遮光部２５Ａによって、カバーシート２１内で混ざることなく、表示部２４Ａ，２４Ｂを照光する。このとき、表示部２４Ａが橙色に照光される。表示部２４Ｂが緑色に照光される。 Furthermore, the light incident on the cover sheet 21 from the light emitting units 32A and 32B illuminates the display units 24A and 24B without being mixed in the cover sheet 21 by the light shielding unit 25A. At this time, the display unit 24A is illuminated in orange. The display unit 24B is illuminated in green.
　また、発光素子１６Ａが発光せず、発光素子１６Ｂのみが発光すると、発光部３２Ａが発光せずに、発光部３２Ｂのみが緑色に発光する。 If the light emitting element 16A does not emit light and only the light emitting element 16B emits light, the light emitting part 32A does not emit light, and only the light emitting part 32B emits green light.
　これに伴い、発光部３２Ｂからの光は、遮光部３３Ａによって、基材３１内を伝って発光部３２Ａの方に漏れることなく、カバーシート２１内に入射する。このとき、発光部３２Ｂの方からのみ橙色の光がカバーシート２１内に入射する。発光部３２Ａの方から橙色の光がカバーシート２１内に入射することはない。 Accordingly, the light from the light emitting unit 32B is incident on the cover sheet 21 through the base material 31 without leaking to the light emitting unit 32A by the light shielding unit 33A. At this time, orange light enters the cover sheet 21 only from the light emitting unit 32B. Orange light does not enter the cover sheet 21 from the light emitting portion 32A.
　さらに、発光部３２Ｂからカバーシート２１内に入射した光は、遮光部２５Ａによって、カバーシート２１内を伝って表示部２４Ａの方に漏れることなく、表示部２４Ｂのみを照光する。このとき、表示部２４Ｂのみが緑色に照光される。表示部２４Ａが薄明るく照光されることはない。 Furthermore, the light that has entered the cover sheet 21 from the light emitting unit 32B is transmitted through the cover sheet 21 by the light shielding unit 25A, and illuminates only the display unit 24B without leaking toward the display unit 24A. At this time, only the display unit 24B is illuminated in green. The display unit 24A is not brightly illuminated.
　すなわち、遮光部２５，３３によって、複数の発光部３２からの光が、基材３１内またはカバーシート２１内で混ざったり、他の発光部３２の方または他の表示部２４の方に漏れたりすることが防止される。このことから、本実施の形態によるスイッチは、見易く多様な照光を行うことができる。 That is, the light from the plurality of light emitting units 32 is mixed in the base material 31 or the cover sheet 21 by the light shielding units 25 and 33, or leaks to the other light emitting units 32 or the other display units 24. Is prevented. From this, the switch according to the present embodiment is easy to see and can perform various illuminations.
　このように、本実施の形態によれば、カバーシート２１内には、表示部２４同士の間の直下に配置される遮光部２５が形成されている。基材３１内には、発光部３２同士の間の直上に配置される遮光部３３が形成されている。これによって、光の混合または光の漏出等が生じた状態で表示部２４が照光されることが防止される。結果として、見易く、多様な照光が可能なキーシート２７及びこれを用いた可動接点体３７を得ることができる。 As described above, according to the present embodiment, the light shielding portion 25 disposed immediately below the display portions 24 is formed in the cover sheet 21. In the base material 31, the light-shielding part 33 arrange | positioned just between the light emission parts 32 is formed. This prevents the display unit 24 from being illuminated in a state where light mixing or light leakage occurs. As a result, it is possible to obtain a key sheet 27 that is easy to see and capable of various illumination and a movable contact body 37 using the key sheet 27.
　さらに、本実施の形態によれば、ベースシート１１の上面には、可動接点１２の中央上方に配置される突起部３５が設けられている。これによって、可動接点１２よりも大きな押圧体２２で押圧操作が行われた場合でも、押圧体２２がやや傾いた状態で押圧操作が行われた場合でも、突起部３５によって常に可動接点１２の中央が押圧されて、可動接点１２の弾性変形が行われる。このため、クリック感のある良好な操作感触を得ることができる。 Furthermore, according to the present embodiment, the upper surface of the base sheet 11 is provided with the protruding portion 35 disposed above the center of the movable contact 12. Thereby, even when the pressing operation is performed with the pressing body 22 larger than the movable contact 12 or when the pressing operation is performed with the pressing body 22 slightly inclined, the center of the movable contact 12 is always provided by the protrusion 35. Is pressed, and the movable contact 12 is elastically deformed. For this reason, it is possible to obtain a good operation feeling with a click feeling.
　なお、カバーシート２１が膨潤可能であることから、下記の（方法１）で比較的簡易に遮光部２５を形成することができる。または、下記の（方法２）でも遮光部２５を形成することができる。さらに、基材３１も膨潤可能であることから、遮光部２５と同様の方法で遮光部３３を形成することができる。 In addition, since the cover sheet 21 can swell, the light shielding part 25 can be formed relatively easily by the following (Method 1). Alternatively, the light shielding portion 25 can also be formed by the following (Method 2). Furthermore, since the base material 31 can also swell, the light shielding part 33 can be formed by the same method as the light shielding part 25.
　（方法１）暗色の染料が溶解する溶剤に暗色の染料を分散させたインクを、インクジェット方式等によって、カバーシート２１の表面に噴き付ける。所定温度で所定時間、カバーシート２１を加熱する。 (Method 1) An ink in which a dark dye is dispersed in a solvent in which the dark dye is dissolved is sprayed on the surface of the cover sheet 21 by an inkjet method or the like. The cover sheet 21 is heated at a predetermined temperature for a predetermined time.
　ここで、カバーシート２１にポリウレタンを用いた場合には、アセトンまたはシクロヘキサノン等の溶剤にアゾ系染料を分散させたインクを使用すればよい。カバーシート２１にシリコーンゴムを用いた場合には、ガソリンまたはベンゼン等に油溶性含金染料を分散させたインクを使用すればよい。カバーシート２１にポリカーボネートを用いた場合には、トルエンまたはキシレン等にアゾ系染料を分散させたインクを使用すればよい。 Here, when polyurethane is used for the cover sheet 21, an ink in which an azo dye is dispersed in a solvent such as acetone or cyclohexanone may be used. When silicone rubber is used for the cover sheet 21, an ink in which an oil-soluble metal-containing dye is dispersed in gasoline or benzene may be used. When polycarbonate is used for the cover sheet 21, an ink in which an azo dye is dispersed in toluene or xylene may be used.
　（方法２）上記の溶剤にアクリルまたはフェノキシ等の樹脂を加えたインクを、スクリーン印刷等によって、カバーシート２１の表面に塗布する。カバーシート２１を加熱し、カバーシート２１内に暗色の染料を浸透させる。 (Method 2) An ink obtained by adding a resin such as acrylic or phenoxy to the above solvent is applied to the surface of the cover sheet 21 by screen printing or the like. The cover sheet 21 is heated to allow the dark dye to penetrate into the cover sheet 21.
　なお、複数の遮光部２５は、キーシート２７を製作する際に、インクジェットまたはスクリーン印刷等によって、同時に形成することができる。複数の遮光部３３も、導光シート３４を製作する際に、インクジェットまたはスクリーン印刷等によって、同時に形成することができる。このため、遮光部２５，３３の数が増えた場合でも、製作時間が増加することはない。さらに、遮光部２５，３３は、背景技術で説明したような切欠部とは異なり、可動接点１２の弾性変形を損なうことがない。このため、良好な操作感触を得ることができる。 The plurality of light shielding portions 25 can be simultaneously formed by ink jet or screen printing when the key sheet 27 is manufactured. The plurality of light shielding portions 33 can also be simultaneously formed by inkjet or screen printing when the light guide sheet 34 is manufactured. For this reason, even when the number of light shielding portions 25 and 33 increases, the manufacturing time does not increase. Further, unlike the notch portions described in the background art, the light shielding portions 25 and 33 do not impair the elastic deformation of the movable contact 12. For this reason, a favorable operation feeling can be obtained.
　なお、遮光部２５は、例えば、遮光部３３と同様に、略帯状に形成されているとしてもよい。または、遮光部２５は、表示部２４等を囲むように、略額縁状に形成されているとしてもよい。ただし、上記の構成のように、複数の表示部２４の真下部分を除くカバーシート２１内に、遮光部２５が形成されている。これによって、カバーシート２１内で光が混合したり、光が漏れたりすることを防止することができる。さらに、発光部３２の光が遮光部２５で吸収されることで、基材３１とカバーシート２１との間の隙間等で発光部３２の光が反射されて不要な箇所に光が漏れることを防止することができる。 In addition, the light shielding part 25 may be formed in a substantially strip shape, for example, similarly to the light shielding part 33. Alternatively, the light shielding unit 25 may be formed in a substantially frame shape so as to surround the display unit 24 and the like. However, as described above, the light-shielding portion 25 is formed in the cover sheet 21 excluding the portion directly below the plurality of display portions 24. Thereby, it is possible to prevent light from mixing in the cover sheet 21 or light from leaking. Further, the light from the light emitting unit 32 is absorbed by the light shielding unit 25, so that the light from the light emitting unit 32 is reflected by a gap between the base material 31 and the cover sheet 21 and the light leaks to unnecessary portions. Can be prevented.
　なお、図４に示すように、カバーシート２１の上面全面に暗色層２３が形成されているとしてもよい。さらに、複数の押圧体２２の上面および側面と、カバーシート２１の上面とが、ハードコート層２６で覆われているとしてもよい。 As shown in FIG. 4, a dark color layer 23 may be formed on the entire upper surface of the cover sheet 21. Furthermore, the upper surface and side surfaces of the plurality of pressing bodies 22 and the upper surface of the cover sheet 21 may be covered with the hard coat layer 26.
　なお、カバーシート２１の下面、特に、導光シート３４の上面と接触する部分が、微細な凹凸状に形成されているとしてもよい。これによって、押圧操作時に、カバーシート２１が導光シート３４に密着し易くなる。さらに、可動接点１２の弾性変形を妨げることを防止することができ、良好な操作感触で押圧操作を行うことができる。 In addition, the lower surface of the cover sheet 21, in particular, the portion that contacts the upper surface of the light guide sheet 34 may be formed in a fine uneven shape. This makes it easier for the cover sheet 21 to be in close contact with the light guide sheet 34 during the pressing operation. Further, it is possible to prevent elastic deformation of the movable contact 12 and to perform a pressing operation with a good operation feeling.
　なお、発光素子１６として、橙色、または緑色等に発光するものの代わりに、白色、青色、または赤色等に発光するものを用いるとしてよい。これによって、白色、青色、または赤色等の様々な色に表示部２４を照光することができる。 Note that, as the light emitting element 16, a light emitting element emitting light in white, blue, red, or the like may be used instead of an element emitting light in orange or green. Accordingly, the display unit 24 can be illuminated with various colors such as white, blue, or red.
　なお、基材３１の下面の代わりに、基材３１の上面に、複数の発光部３２が形成されているとしてもよい。これによって、印刷以外に、貼付、インクジェット、レーザ加工、プレス加工、または成形加工等の様々な方法によっても、発光部３２を形成することができる。 Note that a plurality of light emitting portions 32 may be formed on the upper surface of the base material 31 instead of the lower surface of the base material 31. Accordingly, the light emitting section 32 can be formed by various methods such as sticking, ink jet, laser processing, press processing, or molding processing in addition to printing.
　なお、上記の可動接点体３７からベースシート１１が省かれて、直接、基材３１の下面に複数の可動接点１２が貼付されているとしてもよい。これによって、全体の構成部品数を減らすことができ、可動接点体３７または可動接点体３７を用いたスイッチをより簡易で安価に形成することができる。 The base sheet 11 may be omitted from the movable contact body 37, and the plurality of movable contacts 12 may be directly attached to the lower surface of the base material 31. Thereby, the total number of components can be reduced, and the movable contact body 37 or the switch using the movable contact body 37 can be formed more simply and inexpensively.
　本発明によるキーシート及びこれを用いた可動接点体は、光の混合または光の漏出が防がれたものであり、多様な照光が可能なものであり、主に各種電子機器の操作用として有用である。 The key sheet according to the present invention and the movable contact body using the key sheet are those in which light mixing or light leakage is prevented and various illuminations are possible, mainly for operation of various electronic devices. Useful.

Claims (2)

  1. 　フィルム状で光透過性のカバーシートと、前記カバーシート上面に装着された光透過性の押圧体と、前記押圧体下面と前記カバーシートの間に形成された複数の表示部からなり、前記複数の表示部の間の前記カバーシート内に、暗色の遮光部を設けたキーシート。 The film-shaped light-transmitting cover sheet, a light-transmitting pressing body mounted on the upper surface of the cover sheet, and a plurality of display portions formed between the lower surface of the pressing body and the cover sheet, A key sheet provided with a dark-colored light-shielding part in the cover sheet between the display parts.
  2. 　請求項１記載のキーシート下面に、前記キーシートの表示部下方に凹凸状の発光部と、略帯状で暗色の遮光部が設けられた導光シートを配設すると共に、前記導光シート下面の前記キーシートの押圧体下方に、略ドーム状で導電金属薄板製の可動接点を装着した可動接点体。 A light guide sheet provided with an uneven light emitting portion and a substantially strip-shaped dark light-shielding portion on the lower surface of the key sheet according to claim 1, and a lower surface of the light guide sheet. A movable contact body in which a movable contact made of a conductive metal thin plate is mounted below the pressing body of the key sheet.
PCT/JP2011/005803 2010-10-22 2011-10-18 Key sheet and movable-contacts body using same WO2012053187A1 (en)

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006244924A (en) * 2005-03-04 2006-09-14 Polymatech Co Ltd Cover sheet for push button switch
JP2008098160A (en) * 2006-10-11 2008-04-24 Samsung Electronics Co Ltd Keypad assembly of electronic device
JP2009163897A (en) * 2007-12-28 2009-07-23 Shin Etsu Polymer Co Ltd Display device and operation switch
JP2010027534A (en) * 2008-07-24 2010-02-04 Panasonic Corp Light guide sheet and movable contact using the same
JP2010146849A (en) * 2008-12-18 2010-07-01 Shin Etsu Polymer Co Ltd Member for push-button switch, key panel, and electronic equipment

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006244924A (en) * 2005-03-04 2006-09-14 Polymatech Co Ltd Cover sheet for push button switch
JP2008098160A (en) * 2006-10-11 2008-04-24 Samsung Electronics Co Ltd Keypad assembly of electronic device
JP2009163897A (en) * 2007-12-28 2009-07-23 Shin Etsu Polymer Co Ltd Display device and operation switch
JP2010027534A (en) * 2008-07-24 2010-02-04 Panasonic Corp Light guide sheet and movable contact using the same
JP2010146849A (en) * 2008-12-18 2010-07-01 Shin Etsu Polymer Co Ltd Member for push-button switch, key panel, and electronic equipment

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