WO2012053187A1 - Feuille de touches et corps à contacts mobiles l'utilisant - Google Patents

Feuille de touches et corps à contacts mobiles l'utilisant 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
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WO
WIPO (PCT)
Prior art keywords
light
light emitting
sheet
cover sheet
movable contact
Prior art date
Application number
PCT/JP2011/005803
Other languages
English (en)
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/ja
Publication of WO2012053187A1 publication Critical patent/WO2012053187A1/fr

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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.

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  • Push-Button Switches (AREA)

Abstract

L'invention concerne une feuille de touches (27) comprenant une feuille de couverture (21), des corps de pression (22) et une pluralité de sections d'affichage (24). La pluralité de sections d'affichage (24) sont agencées sur la face supérieure de la feuille de couverture (21). Les corps de pression (22) sont agencés au-dessus de la pluralité de sections d'affichage (24). Des sections de blocage de lumière (25) sont formées à l'intérieur de la feuille de couverture (21). Les sections de blocage de lumière (25) sont agencées directement en dessous et entre les sections d'affichage (24). Une feuille de guidage de lumière (34) est agencée au niveau du dessous de la feuille de touches (27). La feuille de guidage de lumière (34) se compose d'un matériau de base (31) et d'une pluralité d'unités électroluminescentes (32). La pluralité d'unités électroluminescentes (32) est agencée au niveau du dessous du matériau de base (31). Des sections de blocage de lumière (33) sont formées à l'intérieur du matériau de base (31) et sont agencées directement au-dessus et entre les unités électroluminescentes (32).
PCT/JP2011/005803 2010-10-22 2011-10-18 Feuille de touches et corps à contacts mobiles l'utilisant WO2012053187A1 (fr)

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JP2012539595A JPWO2012053187A1 (ja) 2010-10-22 2011-10-18 キーシート及びこれを用いた可動接点体

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JP2010-236936 2010-10-22
JP2010236936 2010-10-22

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WO2012053187A1 true WO2012053187A1 (fr) 2012-04-26

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JP (1) JPWO2012053187A1 (fr)
WO (1) WO2012053187A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006244924A (ja) * 2005-03-04 2006-09-14 Polymatech Co Ltd 押釦スイッチ用カバーシート
JP2008098160A (ja) * 2006-10-11 2008-04-24 Samsung Electronics Co Ltd 電子機器のキーパッドアセンブリ
JP2009163897A (ja) * 2007-12-28 2009-07-23 Shin Etsu Polymer Co Ltd 表示装置及び操作スイッチ
JP2010027534A (ja) * 2008-07-24 2010-02-04 Panasonic Corp 導光シート及びこれを用いた可動接点体
JP2010146849A (ja) * 2008-12-18 2010-07-01 Shin Etsu Polymer Co Ltd 押釦スイッチ用部材、キーパネルおよび電子機器

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006244924A (ja) * 2005-03-04 2006-09-14 Polymatech Co Ltd 押釦スイッチ用カバーシート
JP2008098160A (ja) * 2006-10-11 2008-04-24 Samsung Electronics Co Ltd 電子機器のキーパッドアセンブリ
JP2009163897A (ja) * 2007-12-28 2009-07-23 Shin Etsu Polymer Co Ltd 表示装置及び操作スイッチ
JP2010027534A (ja) * 2008-07-24 2010-02-04 Panasonic Corp 導光シート及びこれを用いた可動接点体
JP2010146849A (ja) * 2008-12-18 2010-07-01 Shin Etsu Polymer Co Ltd 押釦スイッチ用部材、キーパネルおよび電子機器

Also Published As

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