WO2008018416A1 - Key sheet, key unit having it, and key sheet manufacturing method - Google Patents
Key sheet, key unit having it, and key sheet manufacturing method Download PDFInfo
- Publication number
- WO2008018416A1 WO2008018416A1 PCT/JP2007/065381 JP2007065381W WO2008018416A1 WO 2008018416 A1 WO2008018416 A1 WO 2008018416A1 JP 2007065381 W JP2007065381 W JP 2007065381W WO 2008018416 A1 WO2008018416 A1 WO 2008018416A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- key
- light
- base
- resin
- key base
- Prior art date
- Legal status (The legal status 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 status listed.)
- Ceased
Links
Classifications
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- 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
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H11/00—Apparatus or processes specially adapted for the manufacture of electric switches
-
- 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
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- 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
- H04M1/23—Construction or mounting of dials or of equivalent devices; Means for facilitating the use thereof
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- 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
- H01H13/88—Processes specially adapted for manufacture of rectilinearly movable switches having a plurality of operating members associated with different sets of contacts, e.g. keyboards
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H2219/00—Legends
- H01H2219/054—Optical elements
- H01H2219/06—Reflector
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- 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
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H2229/00—Manufacturing
- H01H2229/044—Injection moulding
- H01H2229/048—Insertion moulding
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H2231/00—Applications
- H01H2231/022—Telephone handset
Definitions
- the present invention relates to an electronic device such as a mobile phone, a PHS, a personal digital assistant (PDA, etc.), a portable audio, a remote controller for home appliances, etc., and a key unit provided with the same.
- the present invention relates to a method for manufacturing a key sheet.
- key tops are light emitting means for illumination (for example, Many are illuminated by light emitting diodes). This is because the key can be easily seen even in a dark place and the operation is easy.
- FIG. 10 is a sectional view showing a conventional example of a key unit in which such a narrow pitch type key sheet is arranged on a wiring board.
- reference numeral 100 denotes a wiring board, which is a wiring film (not shown), a light emitting means for illumination that does not appear in the drawing, for example, a light emitting diode (LED), and a metal dome (for example, stainless steel / SUS (Made of steel) 102 on the surface.
- a light emitting means for illumination for example, a light emitting diode (LED)
- a metal dome for example, stainless steel / SUS (Made of steel) 102 on the surface.
- 104 is a reinforcing plate that constitutes the key base 107 with the keypads 106, 106,..., For example, a plurality of keypads 106 that are made of transparent or translucent resin or metal such as polycarbonate, etc. Keypad arrangement holes 104a, 104a,.
- Keypads 106, 106, ⁇ are placed in the keypad placement holes 104a, 104a, ⁇ of the reinforcing plate 104, and the keys are placed on the outer surface of the keypads 106, 106, ⁇ It is fixed to the inner surface of the pad placement holes 104a, 104a, ... Reinforced to obtain the required mechanical strength.
- 108 is a light-shielding mask sheet (light-shielding plate) disposed on the key base (particularly when the reinforcing plate 104 is made of transparent or translucent resin) 10 7. ⁇ It occupies the area below 110) and shields it from light, and it consists of a light-shielding film or a thin metal plate.
- [0005] 110 is a key top, which is fixed to the upper surface of the base portion 106a of the keypad 106.
- 106 b is a pusher part.
- the key top is generally made of a transparent or translucent resin such as polycarbonate, but from the viewpoint of design, aesthetics, etc., the key top may be made of metal or may have a metallic surface on the surface.
- Patent Document 1 Japanese Patent Application 2006— 013232
- the conventional key sheet as shown in FIG. 10 has a problem that it is difficult to diversify the color of illumination light.
- the light emission colors of the plurality of LEDs provided as the light emitting means for illumination are all keys including those using the key sheet shown in FIG. The same throughout (for example, white, green, red, etc.).
- the power that can be considered to make the colors of LEDs in one type of area different from LEDs in another type of area Since the key top to be illuminated can be created, the color of the illumination light emitted from the key top cannot be varied in a predetermined manner for each area.
- the present invention has been made to solve such a problem, and has transparency or translucency.
- the key base made of resin has a plurality of pad parts, and the key tops with key tops on each pad part or key units using the same make the light color of the key tops belonging to different areas different. The purpose is to be able to.
- a key base made of a resin having transparency or translucency is provided with a plurality of pad portions, and a key top is provided on each pad portion.
- the key base is divided into a plurality of areas including one or a plurality of pad portions, and a light-shielding portion is provided at a boundary between the adjacent areas of the key base, corresponding to each area.
- at least one illumination light emitting means placement section is guided by the key base entirely or partially in each area of the key base and placed in each illumination light emission means placement section.
- the key sheet is provided with reflecting means for directing light from the illuminated light emitting means toward the key top forming side.
- one embodiment of the key unit according to the present invention corresponds to the key sheet, a wiring board on which the key sheet is placed, and each pad of the key sheet on the wiring board.
- a switching element arranged at a position and switched by operation of the key top on the pad, and an illumination light emitting means arranged in each illumination light emitting means arrangement portion on the wiring board. It is a key unit.
- an insert body that forms a light-shielding portion is loaded in a mold, and a resin serving as a key base is injected into the mold.
- a resin serving as a key base is injected into the mold.
- a resin film made of a transparent or translucent resin serving as a key base is formed on a carrier base, and the resin film is formed on the resin film.
- FIG. 1 is an overall exploded perspective view of a first embodiment of the present invention.
- FIG. 2 is a cross-sectional view of the first embodiment.
- FIG. 3 is an overall exploded perspective view of a second embodiment of the present invention.
- FIG. 4 is a cross-sectional view of an embodiment of the second embodiment.
- FIG. 5 (A) to (D) are cross-sectional views showing a manufacturing method of a reinforcing portion of a key base according to a third embodiment of the present invention in the order of steps.
- FIG. 6 (A) to (D) are cross-sectional views showing a method of manufacturing a reinforcing portion of a key base according to a fourth embodiment of the present invention in the order of steps.
- FIG. 7 is a cross-sectional view showing a reinforcing portion of a key base according to a fifth embodiment of the present invention.
- FIG. 8 is a cross-sectional view showing a reinforcing portion of a key base according to a sixth embodiment of the present invention.
- FIG. 9 (A) and (B) show a seventh embodiment of the present invention.
- (A) is a planar positional relationship between the key base and its area, the wiring board, and the light emitting means (LED) for illumination.
- FIG. 2B is a schematic plan view showing a cross-sectional view.
- FIG. 10 is a cross-sectional view showing the background art.
- a first embodiment of a key sheet according to the present invention is a key sheet in which a plurality of pad portions are provided on a key base made of resin power having transparency or translucency, and a key top is provided on each pad portion.
- the key base is divided into a plurality of areas including one or a plurality of pad portions, a light shielding portion is provided at a boundary between the adjacent areas of the key base, and at least one corresponding to each area is provided.
- Illuminating light emitting means arrangement portions are provided, and light is guided by the key base entirely or partially in each area of the key base and arranged in each of the above light emitting means arranging portions for illumination.
- the key sheet is provided with a reflecting means for directing light from the light emitting means toward the key top forming side.
- the reflecting means is selectively disposed in a partial area in each area of the key sheet. It is characterized by that.
- the disposition density of the reflecting means in each area becomes farther from the light emitting means for illuminating light corresponding to the area. Characterized by being raised.
- a fourth embodiment of the key sheet according to the present invention is characterized in that, in the above key sheet, the key sheet comprises a concave portion formed on a back surface of the key base made of the reflection means force transparent or translucent resin. To do. As long as the concave portion has a reflection function, it may be fine, for example, referred to as a texture, or may be relatively large.
- the reflecting means is formed on the back surface of the key base made of transparent or translucent resin. It is characterized by coating power.
- the key base has a hole in a portion corresponding to a boundary between the adjacent areas, and the light shielding portion is formed in the hole. It is characterized by being filled with a non-light transmissive resin.
- a first embodiment of a key unit according to the present invention corresponds to the key sheet, a wiring board on which the key sheet is placed, and the pads of the key sheet on the wiring board.
- a switching element arranged at a position and switched by the operation of the key top on the pad, and an illumination light emitting means arranged in each illumination light emitting means arrangement portion on the wiring board. It is characterized by.
- an insert body that forms a light-shielding portion is loaded in a mold, and a resin serving as a key base is injected into the mold.
- a resin serving as a key base is injected into the mold.
- a resin film made of a transparent or translucent resin serving as a key base is formed on a carrier base, and holes are selectively formed in the resin film.
- a key base is manufactured by injecting a resin constituting a light shielding portion into the hole.
- the key base since the key base is formed of a resin having transparency or translucency, the key base itself can be used as a light guiding means, and each key base is provided in each area.
- the light from the light emitting means for illumination is totally or partially Since the reflecting means directed toward the top forming side is provided, the key top can be illuminated with light of the light emitting means for illumination in each area.
- the key base is divided into a plurality of areas including one or a plurality of pad portions.
- the light shielding portion is provided at the boundary between each adjacent area of the key base, even when different light emitting means are arranged for each area when the key unit is assembled on the wiring board, The key tops in the area can be illuminated only by light from the illumination light emitting means in the area.
- the color of the illumination light of the key tops belonging to different areas can be changed beautifully without being mixed with each other.
- the reflecting means is selectively arranged in a partial region in each area, the reflection is performed only in the area where the keypad is in the area.
- the light from the light emitting means for illumination can be effectively used for the illumination of the key top.
- the arrangement density of the reflection means is increased as the distance from the illumination light emission means arrangement portion increases, so that the intensity increases as the light from the illumination light emission means travels. It is possible to prevent the key top illumination light from decreasing due to attenuation, and to prevent uneven illumination light in each area!
- the recess is provided on the back surface of the key base, the light guided by the key base itself can be reflected to the key top side by the recess.
- the concave portion can be used as a reflecting means for directing light toward the key top forming side.
- the recess can be formed by providing a mold that can be used to mold the key base so that the recess can be formed, so that the key base can be manufactured without increasing the manufacturing cost. it can.
- a coating film for example, a white coating film
- the force S can be used as a reflecting means for directing light toward the key top forming side with the coating film. Since the coating film can be formed by a relatively simple method such as printing on the back side of the key base, the key base can be manufactured without increasing the manufacturing cost.
- the non-light A light-shielding part that completely prevents light leakage between the respective areas can be formed by using the permeable resin.
- a translucent resin as a key base is formed on the entire surface, and the hole is formed simultaneously with the outer shape of the key base by selective etching, and then, for example, a dispenser is used.
- a dispenser is used.
- it can be manufactured by a relatively simple method in which a non-light-transmitting resin is injected into the hole.
- the key unit is configured using any one of the key sheets described above, so that the effect of the key sheet of the above-described misalignment can be enjoyed. Touch with force S.
- the translucent resin forming the key base is injected into the mold in which the member made up of the light-shielding portion is loaded as the insert body.
- a key base having a light shielding portion can be manufactured by using a molding technique.
- the translucent resin to be the key base is formed on the entire surface, and the hole is formed simultaneously with the formation of the outer shape of the key base by selective etching. Then, for example, a non-light-transmitting resin is injected into the hole by using a dispenser, for example, so that it can be manufactured by a relatively simple method.
- the key base of the key sheet is basically divided into a plurality of areas including one or a plurality of pad portions, and a light shielding portion is formed at the boundary between adjacent areas of the key base. And at least one illuminating light emitting means arrangement portion corresponding to each area, and the light from the illuminating light emitting means is entirely or partially placed in each area of the key base. Reflecting means directed toward the forming side is disposed, and as the key base material, a resin made of all silicone rubber or thermoplastic elastomer is suitable. Further, the light shielding portion for optically separating the adjacent areas may be a substance other than a resin such as a force S, a metal such as hard silicone rubber or a resin made of thermoplastic elastomer.
- the key base is manufactured by, for example, inserting a light shielding portion made of hard resin or metal into the mold as an insert body, and injecting resin forming the key base body into the mold. This can be done by molding techniques.
- the key base is formed with a translucent resin on the entire surface, and the hole is formed simultaneously with the formation of the outer shape of the key base by selective etching, and then, for example, a dispenser is used. It can be manufactured by injecting a light transmissive resin.
- a recess or a coating formed on the back surface of the key base can be used as a reflecting means for directing light from the light emitting means for illumination toward the key top forming side.
- the color of the coating is optimally white.
- LED is the most suitable light emitting means for illumination attached to the wiring board to be configured, but is not necessarily limited thereto.
- the number of illumination light emitting means arranged for each area may be one or plural, and it is preferable to increase the number when the area is large.
- FIG. 1 and 2 show a first embodiment (Example 1) of the present invention.
- FIG. 1 is an exploded perspective view of the whole embodiment, and
- FIG. 2 is a sectional view.
- 2, 2, ... are the key tops of each key and are made of translucent resin. Specifically, it is made of, for example, PC (polycarbonate), PET (polyethylene terephthalate), PMMA (polymethyl methacrylate: acrylic).
- PC polycarbonate
- PET polyethylene terephthalate
- PMMA polymethyl methacrylate: acrylic
- 2, 2, ... are the key tops of the key tops 2, 2, '"of the keys located in the first area 4, and 2, 2, 2, ... are also in the second area 4 Located key The key tops 2, 2,... Are the key tops of the keys located in the third area 4.
- Each of the above-mentioned areas 4, 4, 4 is classified by the difference in the color of the illumination light of the key tops 2, 2, ...
- a light shielding portion (18), which will be described later, is provided at least at the boundary between the adjacent areas 4 and 4, and the force S and the areas 4 and 4 are partitioned by the light shielding portion (18).
- the light shielding part (18) will be described in detail later.
- Reference numeral 6 denotes a key base, and the key tops 2, 2,... And the key base 6 constitute a key sheet 8.
- 10, 10,... Are keypads constituting the key base 6 (corresponding to the pad portion in the scope of claims) and are provided corresponding to the respective keys 2, 2,.
- it is made of an elastic resin such as silicone rubber or thermoplastic elastomer.
- the key tops 2, 2,... Are bonded onto the keypads 10, 10,.
- the presser part of the keypad 10, 10, ... is located on the key switch built-in metal dome (32, 32, ...) provided on the surface of the wiring board (30) described later. .
- Reference numeral 12 denotes a reinforcing part of the key base 6, which is made of, for example, transparent or translucent resin such as polyethylene terephthalate, polycarbonate, acrylic, etc., and the reinforcing part 12 and the keypads 10, 10,.
- Keybase 6 is configured. 14, 14,...
- illumination light emitting means placement recesses (corresponding to the illumination light emission means placement part in the claims) formed on the back surface of the reinforcing part of the key base 6.
- the LEDs (34, 34,...) Provided on the surface of the wiring board (30), which will be described later, are housed.
- the 16 is a hole in the reinforcing part 12 of the key base 6.
- a non-light-transmitting resin for example, a hard silicone resin or various elastomers is injected into the hole 16, and the light shielding part 18 is constituted by the injected resin. .
- the light shielding portion 18 is formed at the boundary between the adjacent areas 4 and 4 and optically separates the adjacent areas 4 and 4.
- the light shielding portion 18 can be formed by forming a hole 16 by patterning the reinforcing portion 12 and injecting a resin into the hole 16, but a hard resin or metal plate molded separately can be used. It can also be formed by insert molding technology. This will be described in detail later.
- a mask sheet 22 covers the reinforcing portion 12 and is made of a resin film having a light shielding property, a metal plate, or the like.
- 30 is a wiring board, and its surface has a key switch and various wiring films such as LED (light emitting means for lighting) connected to the control circuit. The illustration and explanation are omitted, only the metal dome and LED Is illustrated and described.
- 34, 34,... are LEDs (corresponding to the light emitting means for illumination in the claims) arranged on the wiring board 30, of which 34, 34,. Are used for illuminating the keys 2, 2,..., 34, 34,.
- D34, 34, ... and LED34, 34, ... have different emission colors.
- LED3 LED3
- the light is guided to the keypad 10 and reflected to the key top 2 side by the recess 20 formed on the back surface of the keypad 10 to become illumination light.
- the key tops 2, 2,... In the first area 4 are red light
- the key tops 2, 2,... In the second area 4 are blue light
- the light shielding portion 18 can prevent the light of different colors from the light emitting LEDs 34'34 corresponding to the areas 4 and 4 to be mixed (color mixing).
- the color of illumination light can be made different for each area that does not involve color mixing.
- FIG. 3 and FIG. 4 show a second embodiment (Example 2) of the present invention
- FIG. 3 is an exploded perspective view of the whole embodiment
- FIG. 4 is a sectional view.
- the key base is the one (6a) in which all (keypad portion and reinforcement portion) are integrally formed of silicone rubber or elastomer resin except for the light shielding portion. It is common in other points. Accordingly, common parts are illustrated using the same reference numerals as those in the first embodiment, detailed description thereof is omitted, and only differences are described in detail with reference to FIGS. 3 and 4.
- Reference numeral 6a denotes a key base in which a keypad portion and a reinforcing portion are integrally formed of the same resin, for example, a resin made of silicone rubber or elastomer. However, only the light-shielding portion 18 is formed of another resin or metal having non-light transmittance.
- the key base 6a having the light shielding portion 18 can be manufactured by the same method as the manufacturing of the reinforcing portion 12 of the key base 6 of the first embodiment.
- FIGS. 5A to 5D are cross-sectional views showing an example of the manufacturing method of the reinforcing portion 12 of the key base 6 of the first embodiment (third embodiment: embodiment 3) in the order of steps. .
- a carrier base 50 made of, for example, a resin is prepared.
- the carrier base 50 is provided with projections 52, 52,... For forming the respective light emitting means placement recesses 14, 14,. It is formed on the surface.
- a reinforcing part forming resin film (thickness, for example, about 0.3 mm to 2 mm) 12a made of, for example, UV curable resin is applied and formed on the entire surface by, for example, spin coating, and irradiated with UV light.
- the resin is cured. 14, 14, ... is the tree It is the light emission means arrangement
- FIG. 5 (A) shows the state after the formation of the reinforcing portion forming resin film 12a.
- a resin that is liquid at room temperature such as a silicone resin colored in black, for example, is provided in the holes 16, 16,. • Inject into the holes, fill the holes 16, 16,... With the resin, and then cure to form a light shielding part (thickness of about 0.3 mm to 2 mm, for example) 18.
- FIGS. 6A to 6D are cross-sectional views showing another example (fourth embodiment: embodiment 4) of the manufacturing method of the reinforcing portion 12 of the key base 6 in the order of steps. This example makes full use of insert molding technology.
- FIG. 6 (D) shows the reinforced part 12 taken out.
- the reinforcing portion 12 of the key base 6 can be manufactured by insert molding technology.
- FIG. 7 is a cross-sectional view showing another example of the reinforcing portion 12 of the key base 6 (fifth embodiment of the present invention: embodiment 5).
- the formation density of the recesses 21, 21,... Formed on the back surface of the reinforcing portion 12 constituting the reflecting means is increased as the distance from the illumination light emitting means placement recess 14 increases.
- the key sheet 8 using the key base 12 is assembled to the wiring board 30 to form a key unit, light from the LED 34 (see FIG. 2), which is a light emitting means for illumination, advances. Accordingly, it is possible to prevent the illumination light of the key top from being lowered due to the strong attenuation, and to prevent the illumination light in the area 4 from becoming uneven.
- the technical idea of increasing the formation density of the recesses 21, 21, ... as the distance from the location where the LDE 34 is arranged is that the keypad part and the reinforcing part are integrated as a key base. Applicable to types.
- FIG. 8 is a cross-sectional view showing still another example of the reinforcing portion 12 of the key base 6 (sixth embodiment of the present invention: Embodiment 6).
- the coating film 23 is formed on the back surface of the reinforcing portion 12 as the reflecting means, and the color is, for example, white.
- Such a white coating film 23 diffusely reflects the light reaching the surface, and thus functions as a reflecting means for irregularly reflecting the light to the key top 2 side.
- the coating film 23 applied to the back surface of the reinforcing portion 12 of the key base 6 is used as a reflecting means.
- FIGS. 3 and 4 The technical idea of forming a coating film on the back surface of the key base and the like of this embodiment and using it as a reflecting means is the type shown in FIGS. 3 and 4 in which the keypad portion and the reinforcing portion are integrated as a key base. It can also be applied to
- FIGS. 9 (A) and 9 (B) show a seventh embodiment (Example 7) of the present invention.
- (A) shows the key base 6 and its area 4 and the wiring board 30 and
- FIG. 5 is a schematic plan view showing a planar positional relationship of the light emitting means (LED) 34 for illumination
- (B) is a sectional view.
- the light emitting means (LEDs) 34, 34,... For illumination are provided on the side surface of the key base 6, and a notch 19 is formed in the light shielding portion 18 that partitions the adjacent areas 4 and 4 to provide illumination. Light emitted from light emitting means (LEDs) 34, 34,... Is guided into each area 4 through a notch 19 formed in the light shielding portion 18.
- the light emitting means (LEDs) 34, 34,... For illumination are not necessarily provided in the respective areas 41, 42, 43, but are arranged so as to face the side of the key base 6. Is also good.
- This embodiment can also be applied to the type shown in FIGS. 3 and 4 in which the keypad portion and the reinforcing portion are integrated as a key base.
- the present invention relates to an electronic device such as a mobile phone, a PHS, a personal digital assistant (PDA, etc.), a portable audio, a remote controller for home appliances, etc., and a key unit including the same. There is a possibility of use in the manufacturing method of the key sheet.
- Lighting means arrangement portion for illumination (light emitting means arrangement concave portion for illumination),
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- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Manufacturing & Machinery (AREA)
- Push-Button Switches (AREA)
- Manufacture Of Switches (AREA)
Description
Claims
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP07792051A EP2053621A1 (en) | 2006-08-07 | 2007-08-06 | Key sheet, key unit having it, and key sheet manufacturing method |
| US12/375,431 US20090322568A1 (en) | 2006-08-07 | 2007-08-06 | Key sheet, key unit having thereof, and method of manufacturing keysheet |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2006214383A JP2008041431A (ja) | 2006-08-07 | 2006-08-07 | キーシート及びそれを備えたキーユニット並びにキーシートの製造方法 |
| JP2006-214383 | 2006-08-07 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2008018416A1 true WO2008018416A1 (en) | 2008-02-14 |
Family
ID=39032946
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/JP2007/065381 Ceased WO2008018416A1 (en) | 2006-08-07 | 2007-08-06 | Key sheet, key unit having it, and key sheet manufacturing method |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US20090322568A1 (ja) |
| EP (1) | EP2053621A1 (ja) |
| JP (1) | JP2008041431A (ja) |
| KR (1) | KR20090048394A (ja) |
| CN (1) | CN101501800A (ja) |
| WO (1) | WO2008018416A1 (ja) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2063297A1 (en) * | 2007-11-22 | 2009-05-27 | Panasonic Corporation | Light guide sheet, movable contact structure using the light guide sheet, method of manufacturing the movable contact structure, and switch using the light guide sheet and the movable contact structure |
| EP2104126A1 (en) * | 2008-03-18 | 2009-09-23 | Research In Motion Limited | Keypad with water and dust protection |
| CN101728105A (zh) * | 2008-10-10 | 2010-06-09 | 三星电子株式会社 | 用于键区组件的背光装置 |
| JP2010165575A (ja) * | 2009-01-16 | 2010-07-29 | Panasonic Corp | 可動接点体 |
| US8050019B2 (en) | 2008-03-18 | 2011-11-01 | Research In Motion Limited | Keypad with water and dust protection |
| CN102473542A (zh) * | 2009-06-29 | 2012-05-23 | 松下电器产业株式会社 | 导光片和使用了该导光片的可动触点体、开关 |
Families Citing this family (38)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JP4427765B2 (ja) * | 2008-08-21 | 2010-03-10 | オムロン株式会社 | キー照明スイッチモジュール |
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Also Published As
| Publication number | Publication date |
|---|---|
| JP2008041431A (ja) | 2008-02-21 |
| EP2053621A1 (en) | 2009-04-29 |
| CN101501800A (zh) | 2009-08-05 |
| US20090322568A1 (en) | 2009-12-31 |
| KR20090048394A (ko) | 2009-05-13 |
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