JP2010225346A - Light guide sheet and moving contact body using the same - Google Patents

Light guide sheet and moving contact body using the same Download PDF

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JP2010225346A
JP2010225346A JP2009069474A JP2009069474A JP2010225346A JP 2010225346 A JP2010225346 A JP 2010225346A JP 2009069474 A JP2009069474 A JP 2009069474A JP 2009069474 A JP2009069474 A JP 2009069474A JP 2010225346 A JP2010225346 A JP 2010225346A
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light
light guide
sheet
guide sheet
light emitting
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Naoki Tachihata
直樹 立畠
Yosuke Chikahisa
陽介 近久
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Panasonic Corp
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Panasonic Corp
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a light guide sheet mainly for use in an operation of various electronic equipment and a moving contact body using the sheet, wherein dispersion in a luminescent color is prevented, and uniform and various illumination is achieved. <P>SOLUTION: In the light guide sheet, light reflected in light-emitting parts 2 is diffused in a diffusion layer 15 on an upper part by forming the diffusion layer 15 on an upper surface of a base material 1 above the plurality of light-emitting parts 2 having an irregular shape. Thus, projecting parts 2A of the light-emitting parts 2 become hard to be viewed, and illumination is performed by the diffused light. Accordingly, the light guide sheet 16 having no dispersion in a luminescent color and achieving uniform and various illumination and a moving contact body 19 using the sheet can be obtained. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

本発明は、主に各種電子機器の操作に使用される導光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 light guide sheet mainly used for operation of various electronic devices and a movable contact body using the same.

近年、各種電子機器、特に携帯電話等の携帯端末機器においては、周囲が暗い場合でも、押釦や表示シート等の識別や操作が容易に行えるように、発光ダイオードやＥＬ素子等を発光させて操作部の照光を行うものが増えており、これらの機器に用いられる可動接点体やスイッチにも、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, various electronic devices, particularly mobile terminal devices such as mobile phones, are operated by emitting light emitting diodes or EL elements so that push buttons and display sheets can be easily identified and operated even when the surroundings are dark. There are an increasing number of parts that illuminate parts, and movable contact bodies and switches used in these devices are also required to be easy to use and capable of various kinds of illumination.

このような従来の導光シートや可動接点体について、図３を用いて説明する。   Such a conventional light guide sheet and movable contact body will be described with reference to FIG.

なお、この図面は構成を判り易くするために、部分的に寸法を拡大して表している。   In addition, in this drawing, in order to make the configuration easy to understand, the dimensions are partially enlarged.

図３は従来のスイッチの断面図であり、同図において、１は光透過性でフィルム状の基材、２は複数の凸部２Ａと凹部２Ｂから形成された凹凸状の発光部で、基材１下面の所定箇所に複数の発光部２が設けられて、導光シート３が形成されている。   FIG. 3 is a cross-sectional view of a conventional switch. In FIG. 3, 1 is a light-transmitting film-like base material, 2 is a concavo-convex light emitting part formed from a plurality of convex parts 2A and concave parts 2B. A plurality of light emitting portions 2 are provided at predetermined positions on the lower surface of the material 1 to form a light guide sheet 3.

また、４はフィルム状のベースシート、５は略ドーム状で導電金属薄板製の可動接点で、ベースシート４外周の所定箇所が、接着剤（図示せず）によって導光シート３下面に貼付されると共に、複数の可動接点５が発光部２下方のベースシート４下面に貼付されて、可動接点体６が構成されている。   Reference numeral 4 denotes a film-like base sheet, and 5 denotes a substantially dome-shaped movable contact made of a conductive metal thin plate. A predetermined portion of the outer periphery of the base sheet 4 is attached to the lower surface of the light guide sheet 3 with an adhesive (not shown). At the same time, a plurality of movable contacts 5 are attached to the lower surface of the base sheet 4 below the light emitting unit 2 to constitute a movable contact body 6.

さらに、７は上下面に複数の配線パターン（図示せず）が形成された配線基板で、上面には略円形状の中央固定接点８Ａと、これを囲む略馬蹄状または略リング状の外側固定接点８Ｂから形成された、複数の固定接点８が設けられている。   Further, reference numeral 7 denotes a wiring board having a plurality of wiring patterns (not shown) formed on the upper and lower surfaces, and a substantially circular central fixed contact 8A on the upper surface and a substantially horseshoe-shaped or ring-shaped outer fixed surrounding the central fixed contact 8A. A plurality of fixed contacts 8 formed from the contacts 8B are provided.

そして、この配線基板７上面に可動接点体６が、各々の可動接点５の外周が外側固定接点８Ｂ上に載置され、可動接点５の下面中央が中央固定接点８Ａと所定の間隙を空けて、対向するように貼付されている。   The movable contact body 6 is placed on the upper surface of the wiring board 7. The outer periphery of each movable contact 5 is placed on the outer fixed contact 8B, and the center of the lower surface of the movable contact 5 is spaced from the central fixed contact 8A by a predetermined gap. , Are affixed to face each other.

また、９は発光ダイオード等の発光素子で、複数の発光素子９が導光シート３側方の配線基板７上面に実装され、基材１の端面に発光面を向けて配置されている。   Reference numeral 9 denotes a light-emitting element such as a light-emitting diode. A plurality of light-emitting elements 9 are mounted on the upper surface of the wiring substrate 7 on the side of the light guide sheet 3 and are arranged with the light-emitting surface facing the end surface of the base material 1.

さらに、１０は光透過性でフィルム状の表示シートで、下面に印刷等によって形成された遮光部１０Ａの所定箇所が、文字や記号等の形状にくり抜かれて複数の表示部１０Ｂが形成され、この表示部１０Ｂが導光シート３の発光部２上方に配置されて、スイッチが構成されている。   Furthermore, 10 is a light-transmitting film-like display sheet, and a predetermined portion of the light-shielding portion 10A formed on the lower surface by printing or the like is cut out into a shape such as a character or a symbol to form a plurality of display portions 10B. The display unit 10B is disposed above the light emitting unit 2 of the light guide sheet 3 to form a switch.

そして、このように構成されたスイッチが、携帯電話等の電子機器の操作面に装着されると共に、複数の中央固定接点８Ａや外側固定接点８Ｂ、複数の発光素子９が配線パターン等を介して、機器の電子回路（図示せず）に接続される。   The switch configured as described above is mounted on the operation surface of an electronic device such as a mobile phone, and a plurality of center fixed contacts 8A, outer fixed contacts 8B, and a plurality of light emitting elements 9 are connected via a wiring pattern or the like. , Connected to the electronic circuit (not shown) of the device.

以上の構成において、表示シート１０の所定の表示部１０Ｂを下方へ押圧操作すると、この下方の導光シート３やベースシート４が撓んで可動接点５の略ドーム状の中央部が押圧され、所定の押圧力が加わると、可動接点５がクリック感を伴って下方へ弾性反転し、可動接点５の下面中央が中央固定接点８Ａに接触することによって、中央固定接点８Ａと外側固定接点８Ｂが、可動接点５を介して電気的に接続された状態となる。   In the above configuration, when the predetermined display portion 10B of the display sheet 10 is pressed downward, the light guide sheet 3 and the base sheet 4 below are bent and the substantially dome-shaped central portion of the movable contact 5 is pressed to When the pressing force is applied, the movable contact 5 is elastically reversed downward with a click feeling, and the center of the lower surface of the movable contact 5 comes into contact with the central fixed contact 8A, whereby the central fixed contact 8A and the outer fixed contact 8B are It is in a state of being electrically connected via the movable contact 5.

また、表示シート１０への押圧力を解除すると、弾性復帰力によって可動接点５が上方へ弾性反転し、可動接点５の下面中央が中央固定接点８Ａから離れて、中央固定接点８Ａと外側固定接点８Ｂが電気的に切断された状態となる。   Further, when the pressing force to the display sheet 10 is released, the movable contact 5 is elastically reversed upward by the elastic restoring force, the center of the lower surface of the movable contact 5 is separated from the central fixed contact 8A, and the central fixed contact 8A and the outer fixed contact are separated. 8B is in an electrically disconnected state.

そして、このような固定接点８の電気的接離に応じて、機器の各機能の切換えが行われると共に、機器の電子回路から発光素子９に電源が供給されると、複数の発光素子９が発光し、この光が端面から導光シート３内に入射して、基材１内を反射しながら内方へ進む。   Then, according to the electrical contact / separation of the fixed contact 8, each function of the device is switched, and when power is supplied from the electronic circuit of the device to the light emitting element 9, the plurality of light emitting elements 9 are The light is emitted, the light enters the light guide sheet 3 from the end face, and travels inward while reflecting inside the base material 1.

さらに、この光が基材１下面の複数の発光部２の凸部２Ａで反射して、これらの上方の表示シート１０の表示部１０Ｂを下方から照光し、複数の表示部１０Ｂが照光されることによって、周囲が暗い場合でも、表示部１０Ｂの文字や記号等の表示が識別でき、操作を容易に行うことが可能なようになっている。   Further, this light is reflected by the convex portions 2A of the plurality of light emitting portions 2 on the lower surface of the base material 1, illuminates the display portion 10B of the upper display sheet 10 from below, and the plurality of display portions 10B are illuminated. Thus, even when the surroundings are dark, the display of characters, symbols, and the like on the display unit 10B can be identified, and the operation can be easily performed.

つまり、表示シート１０を押圧操作することによって導光シート３上面を押圧し、可動接点５を弾性反転させて固定接点８の電気的接離を行うと共に、発光素子９の光を端面から導光シート３内に導入し、複数の発光部２を発光させることによって、表示シート１０の複数の表示部１０Ｂを照光するように構成されているものであった。   That is, by pressing the display sheet 10, the upper surface of the light guide sheet 3 is pressed, the movable contact 5 is elastically reversed to electrically connect and separate the fixed contact 8, and light from the light emitting element 9 is guided from the end face. It is configured to illuminate the plurality of display units 10B of the display sheet 10 by introducing the light into the sheet 3 and causing the plurality of light emitting units 2 to emit light.

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。
特開２００８−３０５６５５号公報 As prior art document information related to the invention of this application, for example, Patent Document 1 is known.
JP 2008-305655 A

しかしながら、上記従来の可動接点体６やスイッチにおいては、発光素子９によって複数の発光部２を発光させ、表示シート１０の表示部１０Ｂの照光を行った際、光が反射する凸部２Ａは明るく、凹部２Ｂはこれよりやや暗く発光するため、上方から複数の凸部２Ａが見えてしまうと共に、同じ発光部２内で明るさのばらつきが生じ、表示部１０Ｂの照光がまだらなものになってしまうという課題があった。   However, in the above-described conventional movable contact body 6 and switch, when the plurality of light emitting portions 2 are caused to emit light by the light emitting element 9 and the display portion 10B of the display sheet 10 is illuminated, the convex portion 2A that reflects light is bright. Since the concave portion 2B emits light slightly darker than this, the plurality of convex portions 2A can be seen from above, and variations in brightness occur in the same light emitting portion 2, and the illumination of the display portion 10B becomes mottled. There was a problem of ending up.

本発明は、このような従来の課題を解決するものであり、発光色のばらつきを防ぎ、均一で多様な照光が可能な導光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 light guide sheet capable of preventing variation in emission color and capable of uniform and diverse illumination, and a movable contact body using the same. 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.

本発明の請求項１に記載の発明は、凹凸状の複数の発光部上方の基材上面に、拡散層を設けて導光シートを構成したものであり、凹凸状の発光部で反射した光を上方の拡散層で拡散することによって、発光部の凸部が見えづらくなると共に、この拡散した光によって照光が行われるため、発光色のばらつきのない、均一で多様な照光が可能な導光シートを得ることができるという作用を有する。   According to the first aspect of the present invention, a light guide sheet is formed by providing a diffusion layer on the upper surface of a base material above a plurality of uneven light emitting portions, and light reflected by the uneven light emitting portions. Is diffused in the upper diffusion layer so that the convex part of the light emitting part becomes difficult to see and the diffused light is illuminated so that the light can be uniformly and diversely illuminated with no variation in emission color. The sheet can be obtained.

請求項２に記載の発明は、請求項１記載の導光シートの発光部下面に、略ドーム状で導電金属薄板製の可動接点を装着して可動接点体を構成したものであり、発光色のばらつきがなく、均一で多様な照光が可能なスイッチを実現することができるという作用を有する。   According to a second aspect of the present invention, a movable contact body is configured by mounting a substantially dome-shaped movable contact made of a conductive metal sheet on the lower surface of the light emitting portion of the light guide sheet according to the first aspect. Therefore, it is possible to realize a switch capable of uniform and diverse illumination.

以上のように本発明によれば、発光色のばらつきがなく、均一で多様な照光が可能な導光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という有利な効果が得られる。   As described above, according to the present invention, there is an advantageous effect that it is possible to realize a light guide sheet capable of uniform and diverse illumination and a movable contact body using the same without variation in emission color.

以下、本発明の実施の形態について、図１及び図２を用いて説明する。   Hereinafter, embodiments of the present invention will be described with reference to FIGS. 1 and 2.

なお、これらの図面は構成を判り易くするために、部分的に寸法を拡大して表している。   These drawings are partially enlarged in size for easy understanding of the configuration.

また、背景技術の項で説明した構成と同一構成の部分には同一符号を付して、詳細な説明を簡略化する。   Further, the same reference numerals are given to the same components as those described in the background art section, and the detailed description will be simplified.

（実施の形態）
図１は本発明の一実施の形態による可動接点体の断面図であり、１はフィルム状でポリウレタンやシリコーン、スチレン等の可撓性を有する光透過性の基材で、この基材１下面には印刷等によって、ポリエステルやエポキシ等の白色や乳白色等の複数の凸部２Ａがドット状に形成されると共に、この凸部２Ａと基材１下面の凹部２Ｂによって、複数の凹凸状の発光部２が設けられている。 (Embodiment)
FIG. 1 is a cross-sectional view of a movable contact body according to an embodiment of the present invention. Reference numeral 1 denotes a film-like light-transmitting base material having flexibility such as polyurethane, silicone, and styrene. A plurality of convex portions 2A such as white and milky white such as polyester and epoxy are formed in a dot shape by printing or the like, and a plurality of concave and convex light emission is formed by the convex portions 2A and the concave portions 2B on the lower surface of the substrate 1. Part 2 is provided.

そして、この発光部２上方の基材１上面には印刷等によって、フェノキシやエポキシ等の光透過性の絶縁樹脂内に、粒径０．１〜５μｍ前後でホルムアルデヒドやメラミン、アクリル等の樹脂粒子が分散された、厚さ１０〜３０μｍ前後の薄い白色や乳白色等の拡散層１５が形成されて、導光シート１６が構成されている。   Then, resin particles such as formaldehyde, melamine, and acrylic having a particle diameter of about 0.1 to 5 μm are formed on the upper surface of the base material 1 above the light emitting portion 2 by a printing or the like in a light-transmitting insulating resin such as phenoxy or epoxy. The light guide sheet 16 is formed by forming a diffusion layer 15 of light white or milky white having a thickness of about 10 to 30 μm in which is dispersed.

また、４はフィルム状でポリエチレンテレフタレート等のベースシート、５は略ドーム状で銅合金や鋼等の導電金属薄板製の可動接点で、ベースシート４外周の所定箇所が、アクリルやシリコーン等の接着剤１７によって導光シート１６下面に貼付されると共に、複数の可動接点５が発光部２下方のベースシート４下面に貼付されている。   Reference numeral 4 is a film and a base sheet such as polyethylene terephthalate, and 5 is a substantially dome-like movable contact made of a conductive metal thin plate such as copper alloy or steel. The adhesive 17 is attached to the lower surface of the light guide sheet 16, and the plurality of movable contacts 5 are attached to the lower surface of the base sheet 4 below the light emitting unit 2.

さらに、１８はポリエチレンテレフタレート等のフィルム状のセパレータで、このセパレータ１８がベースシート４下面全面を覆うように貼付され、保管・搬送時に可動接点５下面に塵埃等が付着しないようにして、可動接点体１９が構成されている。   Furthermore, 18 is a film-like separator such as polyethylene terephthalate, which is affixed so as to cover the entire lower surface of the base sheet 4 so that dust or the like does not adhere to the lower surface of the movable contact 5 during storage / transport. A body 19 is constructed.

また、図２はこのような可動接点体１９を用いたスイッチの断面図であり、同図において、７はポリエチレンテレフタレートやポリカーボネート等のフィルム状、または紙フェノールやガラス入りエポキシ等の板状の配線基板で、上下面に銅等によって複数の配線パターン（図示せず）が形成されると共に、上面には銅やカーボン等によって、略円形状の中央固定接点８Ａと、これを囲む略馬蹄状または略リング状の外側固定接点８Ｂから形成された、複数の固定接点８が設けられている。   2 is a cross-sectional view of a switch using such a movable contact body 19. In FIG. 2, reference numeral 7 denotes a film-like wiring such as polyethylene terephthalate or polycarbonate, or a plate-like wiring such as paper phenol or glass-filled epoxy. A plurality of wiring patterns (not shown) are formed on the upper and lower surfaces of the substrate by copper or the like, and a substantially circular central fixed contact 8A and an approximately horseshoe shape surrounding the center fixed contact 8A by copper or carbon on the upper surface. A plurality of fixed contacts 8 formed from a substantially ring-shaped outer fixed contact 8B are provided.

そして、この配線基板７上面にセパレータ１８を剥離した可動接点体１９が、各々の可動接点５の外周が外側固定接点８Ｂ上に載置され、可動接点５の下面中央が中央固定接点８Ａと所定の間隙を空けて、対向するように貼付されている。   And the movable contact body 19 which peeled the separator 18 on this wiring board 7 upper surface is mounted in the outer periphery of each movable contact 5 on the outer side fixed contact 8B, and the center of the lower surface of the movable contact 5 and the center fixed contact 8A is predetermined. Affixed so as to face each other with a gap in between.

また、９は発光ダイオード等の発光素子で、複数の発光素子９が導光シート１６側方の配線基板７上面に実装され、基材１の端面に発光面を向けて配置されている。   Reference numeral 9 denotes a light-emitting element such as a light-emitting diode. A plurality of light-emitting elements 9 are mounted on the upper surface of the wiring substrate 7 on the side of the light guide sheet 16 and are arranged with the light-emitting surface facing the end surface of the substrate 1.

さらに、１０は光透過性でフィルム状の表示シートで、下面に印刷等によって形成された遮光部１０Ａの所定箇所が、文字や記号等の形状にくり抜かれて複数の表示部１０Ｂが形成され、この表示部１０Ｂが導光シート１６の発光部２上方に配置されて、スイッチが構成されている。   Furthermore, 10 is a light-transmitting film-like display sheet, and a predetermined portion of the light-shielding portion 10A formed on the lower surface by printing or the like is cut out into a shape such as a character or a symbol to form a plurality of display portions 10B. The display unit 10B is arranged above the light emitting unit 2 of the light guide sheet 16 to form a switch.

そして、このように構成されたスイッチが、携帯電話等の電子機器の操作面に装着されると共に、複数の中央固定接点８Ａや外側固定接点８Ｂ、複数の発光素子９が配線パターン等を介して、機器の電子回路（図示せず）に接続される。   The switch configured as described above is mounted on the operation surface of an electronic device such as a mobile phone, and a plurality of center fixed contacts 8A, outer fixed contacts 8B, and a plurality of light emitting elements 9 are connected via a wiring pattern or the like. , Connected to the electronic circuit (not shown) of the device.

以上の構成において、表示シート１０の所定の表示部１０Ｂを下方へ押圧操作すると、この下方の導光シート１６やベースシート４が撓んで可動接点５の略ドーム状の中央部が押圧され、所定の押圧力が加わると、可動接点５がクリック感を伴って下方へ弾性反転し、可動接点５の下面中央が中央固定接点８Ａに接触することによって、中央固定接点８Ａと外側固定接点８Ｂが、可動接点５を介して電気的に接続された状態となる。   In the above configuration, when the predetermined display portion 10B of the display sheet 10 is pressed downward, the light guide sheet 16 and the base sheet 4 below are bent and the substantially dome-shaped central portion of the movable contact 5 is pressed, and the predetermined portion When the pressing force is applied, the movable contact 5 is elastically reversed downward with a click feeling, and the center of the lower surface of the movable contact 5 comes into contact with the central fixed contact 8A, whereby the central fixed contact 8A and the outer fixed contact 8B are It is in a state of being electrically connected via the movable contact 5.

また、表示シート１０への押圧力を解除すると、弾性復帰力によって可動接点５が上方へ弾性反転し、可動接点５の下面中央が中央固定接点８Ａから離れて、中央固定接点８Ａと外側固定接点８Ｂが電気的に切断された状態となる。   Further, when the pressing force to the display sheet 10 is released, the movable contact 5 is elastically reversed upward by the elastic restoring force, the center of the lower surface of the movable contact 5 is separated from the central fixed contact 8A, and the central fixed contact 8A and the outer fixed contact are separated. 8B is in an electrically disconnected state.

そして、このような固定接点８の電気的接離に応じて、機器の各機能の切換えが行われると共に、機器の電子回路から発光素子９に電源が供給されると、複数の発光素子９が発光し、この光が端面から導光シート１６内に入射して、基材１内を反射しながら内方へ進む。   Then, according to the electrical contact / separation of the fixed contact 8, each function of the device is switched, and when power is supplied from the electronic circuit of the device to the light emitting element 9, the plurality of light emitting elements 9 are The light is emitted, and this light enters the light guide sheet 16 from the end face, and proceeds inward while reflecting the inside of the substrate 1.

さらに、この光が基材１下面の複数の発光部２の凸部２Ａで反射した後、拡散層１５で拡散されて、これらの上方の表示シート１０の表示部１０Ｂを下方から照光し、複数の表示部１０Ｂが照光されることによって、周囲が暗い場合でも、表示部１０Ｂの文字や記号等の表示が識別でき、操作を容易に行うことが可能なようになっている。   Further, after this light is reflected by the convex portions 2A of the plurality of light emitting portions 2 on the lower surface of the base material 1, it is diffused by the diffusion layer 15, and the display portion 10B of the upper display sheet 10 is illuminated from below. By illuminating the display unit 10B, even when the surroundings are dark, the display of characters, symbols, etc. on the display unit 10B can be identified and the operation can be easily performed.

つまり、表示シート１０を押圧操作することによって導光シート１６上面を押圧し、可動接点５を弾性反転させて固定接点８の電気的接離を行うと共に、発光素子９の光を端面から導光シート１６内に導入し、複数の発光部２を発光させることによって、表示シート１０の複数の表示部１０Ｂを照光するように構成されている。   That is, by pressing the display sheet 10, the upper surface of the light guide sheet 16 is pressed, the movable contact 5 is elastically inverted to electrically connect and separate the fixed contact 8, and the light from the light emitting element 9 is guided from the end face. The plurality of display units 10B of the display sheet 10 are illuminated by being introduced into the sheet 16 and causing the plurality of light emitting units 2 to emit light.

そして、この時、凹凸状の複数の発光部２上方の基材１上面には、拡散層１５が形成され、発光部２の凸部２Ａで反射して光が拡散層１５で拡散された後、上方へ出射して表示部１０Ｂを照光することによって、発光部２の凸部２Ａが見えづらくなると共に、同じ発光部２内で発光色のばらつきのない、均一で多様な照光が行えるようになっている。   At this time, after the diffusion layer 15 is formed on the upper surface of the base material 1 above the plurality of uneven light emitting portions 2 and reflected by the convex portions 2A of the light emitting portion 2, the light is diffused by the diffusion layer 15 By projecting upward and illuminating the display unit 10B, the convex portion 2A of the light emitting unit 2 becomes difficult to see, and uniform and diverse illumination with no variation in emission color can be performed within the same light emitting unit 2. It has become.

すなわち、発光部２の凸部２Ａで反射し、基材１上面から上方へ出射した光が拡散層１５内で拡散され、拡散層１５上面全体が発光することで、上方から発光部２の凸部２Ａが見えづらくなると共に、ばらつきのない均一な発光色で、上方の表示部１０Ｂの照光が行われるように構成されている。   That is, the light reflected from the convex portion 2A of the light emitting unit 2 and emitted upward from the upper surface of the base material 1 is diffused in the diffusion layer 15, and the entire upper surface of the diffusion layer 15 emits light. The portion 2A is difficult to see, and the upper display portion 10B is illuminated with a uniform emission color with no variation.

なお、拡散層１５内に分散する樹脂粒子には、上述したように粒径０．１〜５μｍ前後の大きさのものを用いることが可能であるが、粒径が小さすぎると光の拡散が不充分となり、大きすぎると光が遮られ発光色が暗くなるため、可視光の波長０．４〜０．８μｍよりもやや大きな、粒径０．４〜１．５μｍのものを用いることがより好ましい。   The resin particles dispersed in the diffusion layer 15 may be those having a particle size of about 0.1 to 5 μm as described above. However, if the particle size is too small, light diffusion may occur. If the size is too large, light is blocked and the color of emitted light becomes dark. Therefore, it is better to use a material having a particle size of 0.4 to 1.5 μm, which is slightly larger than the visible light wavelength of 0.4 to 0.8 μm. preferable.

また、以上の説明では、基材１の下面に凹凸状の複数の発光部２を形成すると共に、この発光部２上方の基材１上面に拡散層１５を形成した構成について説明したが、基材１上面に複数の発光部２を設け、この上面に拡散層１５を重ねて形成した構成としても、本発明の実施は可能である。   In the above description, the configuration in which the plurality of uneven light emitting portions 2 are formed on the lower surface of the base material 1 and the diffusion layer 15 is formed on the upper surface of the base material 1 above the light emitting portion 2 has been described. The present invention can also be implemented with a configuration in which a plurality of light emitting portions 2 are provided on the upper surface of the material 1 and a diffusion layer 15 is formed on the upper surface.

このように本実施の形態によれば、凹凸状の複数の発光部２上方の基材１上面に、拡散層１５を設けることによって、発光部２で反射した光を上方の拡散層１５で拡散することで、発光部２の凸部２Ａが見えづらくなると共に、この拡散した光によって照光が行われるため、発光色のばらつきのない、均一で多様な照光が可能な導光シート１６、及びこれを用いた可動接点体１９を得ることができるものである。   As described above, according to the present embodiment, by providing the diffusion layer 15 on the upper surface of the base material 1 above the plurality of uneven light emitting units 2, the light reflected by the light emitting unit 2 is diffused by the upper diffusion layer 15. As a result, the convex portion 2A of the light emitting unit 2 is difficult to see, and the diffused light is illuminated, so that the light guide sheet 16 can be uniformly and diversely illuminated with no variation in emission color, and this The movable contact body 19 using can be obtained.

なお、以上の説明では、印刷によって凹凸状の複数の発光部２を形成した構成について説明したが、印刷以外にも貼付やインクジェット、レーザ加工、プレス加工、成形加工等、様々な方法によっても発光部２の形成は可能である。   In the above description, the configuration in which the plurality of light emitting portions 2 having the concavo-convex shape is formed by printing has been described, but light emission is also possible by various methods such as sticking, ink jet, laser processing, press processing, and molding processing in addition to printing. The part 2 can be formed.

さらに、以上の説明では、下面に複数の可動接点５が貼付されたベースシート４を、導光シート１６の下面に貼付した構成について説明したが、ベースシート４をなくし、導光シート１６の発光部２下面に複数の可動接点５を直接貼付した構成とすれば、全体の構成部品数を減らし、可動接点体をより簡易で安価なものとすることができる。   Furthermore, in the above description, the configuration in which the base sheet 4 with the plurality of movable contacts 5 attached to the lower surface is attached to the lower surface of the light guide sheet 16 has been described. However, the base sheet 4 is eliminated and the light guide sheet 16 emits light. If it is set as the structure which stuck the some movable contact 5 directly to the lower part of the part 2, the number of the whole components can be reduced and a movable contact body can be made simpler and cheaper.

本発明による導光シート及びこれを用いた可動接点体は、発光色のばらつきを防ぎ、均一で多様な照光が可能なものが得られ、主に各種電子機器の操作用として有用である。   The light guide sheet according to the present invention and the movable contact body using the same can be used to prevent variations in emission color, and can provide uniform and diverse illumination, and are mainly useful for operation of various electronic devices.

本発明の一実施の形態による可動接点体の断面図Sectional drawing of the movable contact body by one embodiment of this invention 同スイッチの断面図Cross section of the switch 従来のスイッチの断面図Cross section of conventional switch

１ 基材
２ 発光部
２Ａ 凸部
２Ｂ 凹部
４ ベースシート
５ 可動接点
７ 配線基板
８ 固定接点
８Ａ 中央固定接点
８Ｂ 外側固定接点
９ 発光素子
１０ 表示シート
１０Ａ 遮光部
１０Ｂ 表示部
１５ 拡散層
１６ 導光シート
１７ 接着剤
１８ セパレータ
１９ 可動接点体 DESCRIPTION OF SYMBOLS 1 Base material 2 Light emission part 2A Convex part 2B Concave 4 Base sheet 5 Movable contact 7 Wiring board 8 Fixed contact 8A Center fixed contact 8B Outer fixed contact 9 Light emitting element 10 Display sheet 10A Light-shielding part 10B Display part 15 Diffusion layer 16 Light guide sheet 17 Adhesive 18 Separator 19 Movable contact body

Claims (2)

フィルム状の基材と、この基材に形成された凹凸状の複数の発光部からなり、上記発光部上方の上記基材上面に、拡散層を設けた導光シート。 A light guide sheet comprising a film-like base material and a plurality of uneven light emitting portions formed on the base material, wherein a diffusion layer is provided on the upper surface of the base material above the light emitting portion. 請求項１記載の導光シートの発光部下面に、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 movable contact body having a substantially dome-shaped movable contact made of a conductive metal thin plate attached to the lower surface of the light emitting portion of the light guide sheet according to claim 1.
JP2009069474A 2009-03-23 2009-03-23 Light guide sheet and moving contact body using the same Pending JP2010225346A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
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Application Number Priority Date Filing Date Title
JP2009069474A JP2010225346A (en) 2009-03-23 2009-03-23 Light guide sheet and moving contact body using the same

Publications (1)

Publication Number Publication Date
JP2010225346A true JP2010225346A (en) 2010-10-07

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ID=43042334

Family Applications (1)

Application Number Title Priority Date Filing Date
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Country Link
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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102479635A (en) * 2010-11-26 2012-05-30 比亚迪股份有限公司 Keyboard, button assembly and button switch assembly
CN102479634A (en) * 2010-11-26 2012-05-30 比亚迪股份有限公司 Key assembly, key switch assembly and keyboard
JP2014503938A (en) * 2010-11-17 2014-02-13 コーニンクレッカ フィリップス エヌ ヴェ Seamless faceplate assembly for keypad device

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014503938A (en) * 2010-11-17 2014-02-13 コーニンクレッカ フィリップス エヌ ヴェ Seamless faceplate assembly for keypad device
CN102479635A (en) * 2010-11-26 2012-05-30 比亚迪股份有限公司 Keyboard, button assembly and button switch assembly
CN102479634A (en) * 2010-11-26 2012-05-30 比亚迪股份有限公司 Key assembly, key switch assembly and keyboard

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