JP4725384B2 - Pushbutton switch lighting structure - Google Patents

Pushbutton switch lighting structure Download PDF

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JP4725384B2
JP4725384B2 JP2006082749A JP2006082749A JP4725384B2 JP 4725384 B2 JP4725384 B2 JP 4725384B2 JP 2006082749 A JP2006082749 A JP 2006082749A JP 2006082749 A JP2006082749 A JP 2006082749A JP 4725384 B2 JP4725384 B2 JP 4725384B2
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push button
light guide
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guide
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JP2007258063A (en
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徳彦 横山
俊夫 稲垣
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サクサ株式会社
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Description

本発明は、比較的径の大きい押しボタンの周囲を照明する押しボタンスイッチの照明構造に関するものである。   The present invention relates to a lighting structure of a push button switch that illuminates the periphery of a push button having a relatively large diameter.

従来の押しボタンスイッチの照明構造としては、押しボタンを、中央部に設けた不透明樹脂からなる押圧部と、この押圧部の周囲に設けた半透明乳白色樹脂からなるリング状の表示部とで構成し、押しボタンの中央部の下方に設けた光源から発光された光を、断面がＶ字状に形成された導光体によって前記表示部に導くようにしたものがある（例えば、特許文献１参照）。
特開平６−２７２９５６号公報（段落「００２１」〜「００２３」、図１および図２） As a lighting structure of a conventional push button switch, the push button is composed of a pressing portion made of an opaque resin provided in the center portion and a ring-shaped display portion made of a translucent milky white resin provided around the pressing portion. However, there is one in which light emitted from a light source provided below the center portion of the push button is guided to the display unit by a light guide having a V-shaped cross section (for example, Patent Document 1). reference).
Japanese Patent Laid-Open No. 6-272756 (paragraphs “0021” to “0023”, FIGS. 1 and 2)

上述した従来の押しボタンスイッチの照明構造においては、表示部が平坦状に形成されているため、導光体によって表示部に導かれた光は、表示部と直交する方向に放射される。このため、押しボタンの正面からは照明されたことを確認することはできるが、押しボタンに対し斜めになる方向からは照明されたことを確認しづらいという問題があった。また、押しボタンの中央部の下方に設けた一つの光源から発光された光を、押しボタンの周辺に設けたリング状の表示部に導く構造としているため、比較的径の大きい押しボタンの場合は、光量が不足し表示部全体を均一に照明することができないという問題もあった。   In the illumination structure of the conventional push button switch described above, since the display unit is formed in a flat shape, the light guided to the display unit by the light guide is radiated in a direction orthogonal to the display unit. For this reason, although it can confirm that it was illuminated from the front of a push button, there existed a problem that it was difficult to confirm that it was illuminated from the direction which becomes diagonal with respect to a push button. In addition, in the case of a push button having a relatively large diameter, the light emitted from one light source provided below the center of the push button is guided to a ring-shaped display provided around the push button. However, there is also a problem that the entire display unit cannot be uniformly illuminated due to insufficient light quantity.

本発明は上記した従来の問題に鑑みなされたものであり、その目的とするところは、押しボタンに対し斜めになる方向からでも照明が確認でき、比較的径の大きい押しボタンでも押しボタンの周囲全体を均一に照明することができる押しボタンスイッチの照明構造を提供するところにある。   The present invention has been made in view of the above-described conventional problems. The object of the present invention is to confirm illumination even from a direction oblique to the push button, and even a push button having a relatively large diameter can be surrounded by a push button. An object of the present invention is to provide an illumination structure of a push button switch that can uniformly illuminate the whole.

この目的を達成するために、請求項１に係る発明は、摺動自在に支持されスイッチをＯＮ・ＯＦＦする押しボタンと、この押しボタンの周囲に設けられ光源から発光された光を導光し押しボタンの周囲を照明する導光体とを備えた押しボタンスイッチの照明構造において、前記押しボタンを摺動自在に支持するように前記導光体をリング状に形成し、押しボタンに導光体からの抜けを規制する規制手段を設け、前記導光体の内周縁に、導光体に導入された光を導出するすり鉢状に形成した光導出部を設け、前記光源を導光体の円周方向に等間隔をおいて複数設け、前記光導入部の前記各光源に対応する部位に三角形に形成された凹部を設けたものである。 In order to achieve this object, the invention according to claim 1 is directed to a push button that is slidably supported to turn a switch on and off, and to guide light emitted from a light source provided around the push button. In a lighting structure of a push button switch including a light guide that illuminates the periphery of the push button, the light guide is formed in a ring shape so as to slidably support the push button, and is guided to the push button. A light-reducing portion formed in a mortar shape for deriving light introduced into the light guide is provided on the inner peripheral edge of the light guide, and the light source is connected to the light guide A plurality are provided at equal intervals in the circumferential direction, and a concave portion formed in a triangle is provided in a portion corresponding to each light source of the light introducing portion .

請求項１に係る発明によれば、リング状に形成された導光体の内周縁に設けた光導出部から導出される光は斜め上方に向かって放射されるため、押しボタンスイッチの正面のみならず斜め方向からでも照明されたことを確認することができる。また、光導入部から導入された光は導光体の円周方向に拡散されるため、複数の光源から発光された光が光導出部から均一に放射される。 According to the first aspect of the present invention, since the light derived from the light deriving portion provided on the inner peripheral edge of the light guide formed in a ring shape is emitted obliquely upward, only the front surface of the push button switch. In other words, it can be confirmed that the light is illuminated from an oblique direction. Moreover, since the light introduced from the light introducing part is diffused in the circumferential direction of the light guide, the light emitted from the plurality of light sources is uniformly emitted from the light deriving part.

以下、本発明の実施の形態を図に基づいて説明する。図１は本発明に係る押しボタンスイッチの照明構造を示す平面図、図２は図１におけるII-II 線断面図であって、同図（Ａ）は押しボタンを押下していない状態を示し、同図（Ｂ）は押しボタンを押下した状態を示し、図３は図１におけるIII-III 線断面図、図４は同じく底面図、図５は同じく押しボタンを示し、同図（Ａ）は平面図、同図（Ｂ）は正面図、図６は同じく導光体を示し、同図（Ａ）は平面図、同図（Ｂ）は同図（Ａ）におけるVI（Ｂ）矢視図、図７は同じくプリント基板の一部を示す平面図である。   Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a plan view showing a lighting structure of a push button switch according to the present invention, FIG. 2 is a cross-sectional view taken along the line II-II in FIG. 1, and FIG. FIG. 3B shows a state where the push button is pressed, FIG. 3 is a cross-sectional view taken along the line III-III in FIG. 1, FIG. 4 is a bottom view, and FIG. Is a plan view, FIG. 6 (B) is a front view, FIG. 6 shows a light guide, FIG. 6 (A) is a plan view, and FIG. 6 (B) is a view taken along arrow VI (B) in FIG. FIG. 7 and FIG. 7 are plan views showing a part of the printed circuit board.

図２において、１はプラスチックによって形成された筺体であって、後述する押しボタン７が露呈する円形の窓２が設けられ、この窓２を囲むように裏面側に円環状の囲い壁３が一体に突設されている。４は筺体１の内部に設けられたプリント基板であって、後述する押しボタン７の押圧部１４によって作動子５ａが押圧されることによりＯＮするスイッチ５が実装されている。   In FIG. 2, reference numeral 1 denotes a casing made of plastic, which is provided with a circular window 2 that exposes a push button 7 to be described later, and an annular enclosure wall 3 is integrally formed on the back side so as to surround the window 2. Projected to Reference numeral 4 denotes a printed circuit board provided inside the housing 1, and a switch 5 that is turned on when the operating element 5 a is pressed by a pressing portion 14 of a push button 7 described later is mounted.

７は頭部８と周部１０とによって略キャップ状に形成された押しボタンであって、頭部８は断面円弧状に形成されており、この頭部８の表面には、図５（Ａ）に示すように文字９が表記されている。この押しボタン７の周部１０の開放端部には、規制手段としてのフランジ１１が設けられており、このフランジ１１の円周方向の一部には、後述する導光体１５の回り止め用凸部１８が係合する回り止め用凹部１２が設けられている。また、この押しボタン７の頭部８の裏面には、円環状に形成されたストッパ１３と、スイッチ５の作動子５ａを押圧する平面視が十字状に形成された押圧部１４とが一体に設けられている。   Reference numeral 7 denotes a push button formed in a substantially cap shape by the head portion 8 and the peripheral portion 10, and the head portion 8 is formed in an arc shape in cross section, and on the surface of the head portion 8, FIG. The character 9 is written as shown in FIG. A flange 11 as a restricting means is provided at the open end of the peripheral portion 10 of the push button 7. A part of the flange 11 in the circumferential direction is used to prevent rotation of a light guide 15 to be described later. An anti-rotation recess 12 with which the protrusion 18 engages is provided. Further, on the back surface of the head 8 of the push button 7, an annular stopper 13 and a pressing portion 14 formed in a cross shape in a plan view for pressing the operating element 5a of the switch 5 are integrally formed. Is provided.

図２において、１５は透光材によってリング状に形成された導光体であって、中央部に前記押しボタン７を摺動自在に支持する摺動孔１６が設けられており、この摺動孔１６の下端縁には押しボタン７のフランジ１１が係合する係合凹部１７が略全周にわたって設けられている。この係合凹部１７の円周方向の一部には、図４に示すように回り止め用凸部１８が設けられている。また、この摺動孔１６の上端縁には、鉛直方向から角度αだけ傾斜するすり鉢状に形成された光導出部１９が設けられており、この光導出部１９の表面には、導光体１５の円周方向に等間隔をおいて連続する凸条体と凹状溝とによって形成された乱反射部２０が設けられている。   In FIG. 2, reference numeral 15 denotes a light guide formed in a ring shape by a translucent material, and is provided with a slide hole 16 for slidably supporting the push button 7 at the center. An engagement recess 17 that engages the flange 11 of the push button 7 is provided on the lower end edge of the hole 16 over substantially the entire circumference. As shown in FIG. 4, a rotation-preventing convex portion 18 is provided on a part of the engaging concave portion 17 in the circumferential direction. In addition, a light derivation part 19 formed in a mortar shape inclined by an angle α from the vertical direction is provided at the upper end edge of the sliding hole 16, and a light guide is provided on the surface of the light derivation part 19. There are provided irregular reflection portions 20 formed by convex ridges and concave grooves that are continuously spaced at equal intervals in 15 circumferential directions.

導光体１５の下部には、図６（Ｂ）に示すように、側面視において三角形に形成された６個の凹部２２が、導光体１５の円周方向に等間隔をおいて６個設けられている。これら凹部２２には、後述する６個のＬＥＤ２５が対応し、これらＬＥＤ２５から発光された光がこれら凹部２２の表面から導光体１５内に導入されるように構成されており、これら凹部２２が光導入部を形成している。２３は導光体１５の周部に円周方向に等角度おいて設けられた４個の係合突起であって、図２（Ａ）に示すように筺体１の裏面に設けた係合凹部１ａに係合させることにより、筺体１に対して導光体１５の回動が規制される。また、導光体１５はプリント基板４と筺体１との間に挟持され、上下方向の移動が規制されている。   In the lower part of the light guide 15, as shown in FIG. 6B, there are six recesses 22 formed in a triangle in a side view at regular intervals in the circumferential direction of the light guide 15. Is provided. These recesses 22 correspond to six LEDs 25 to be described later, and light emitted from these LEDs 25 is configured to be introduced into the light guide 15 from the surface of these recesses 22. A light introduction part is formed. Reference numeral 23 denotes four engagement protrusions provided at equal angles in the circumferential direction on the peripheral portion of the light guide 15, and the engagement recesses provided on the back surface of the housing 1 as shown in FIG. By engaging with 1 a, the rotation of the light guide 15 is restricted with respect to the housing 1. Further, the light guide 15 is sandwiched between the printed circuit board 4 and the housing 1, and movement in the vertical direction is restricted.

図７において、２５はプリント基板４に実装された光源としての６個のＬＥＤであって、上述したように導光体１５の６個の凹部２２に対応するように、スイッチ５の周囲に円周方向に等角度をおいて設けられている。これら６個のＬＥＤ２５は、部品実装装置によって実装しやすいように、４個のＬＥＤ２５が図中左右方向に延在し、２個のＬＥＤ２５がこれと直交するように図中上下方向に延在するように実装されている。   In FIG. 7, reference numeral 25 denotes six LEDs as light sources mounted on the printed circuit board 4, and a circle around the switch 5 so as to correspond to the six recesses 22 of the light guide 15 as described above. They are provided at equal angles in the circumferential direction. These six LEDs 25 extend in the horizontal direction in the figure so that they can be easily mounted by the component mounting apparatus, and extend in the vertical direction in the figure so that the two LEDs 25 are orthogonal to this. Has been implemented.

このような構成において、図４に示すように導光体１５の回り止め用凸部１８に押しボタン７の回り止め用凹部１２を係入させながら、押しボタン７の周部１０を、図２（Ａ）に示すように導光体１５の摺動孔１６に嵌合することにより、押しボタン７を導光体１５に摺動自在に支持させる。このように、導光体１５に回り止め用凸部１８を設け、押しボタン７に回り止め用凹部１２を設けたことにより、導光体１５に摺動自在に支持された押しボタン７は円周方向の回動が規制されるから、図１に示すように頭部８に表記された文字９が押しボタン７の円周方向にずれるようなことがない。   In such a configuration, as shown in FIG. 4, the peripheral portion 10 of the push button 7 is inserted into the anti-rotation convex portion 18 of the light guide 15 while the anti-rotation concave portion 12 of the push button 7 is engaged. As shown in (A), the push button 7 is slidably supported by the light guide 15 by fitting into the slide hole 16 of the light guide 15. As described above, the light guide 15 is provided with the rotation-preventing convex portion 18 and the push button 7 is provided with the rotation-preventing concave portion 12, so that the push button 7 slidably supported by the light guide 15 is circular. Since rotation in the circumferential direction is restricted, the character 9 written on the head 8 does not shift in the circumferential direction of the push button 7 as shown in FIG.

導光体１５に摺動自在に支持された押しボタン７は、フランジ１１が導光体１５の係合凹部１７に係合することにより、押しボタン７の導光体１５からの抜けが規制される。この押しボタン７の頭部８とプリント基板４との間には、図２（Ａ）に示すように圧縮コイルばね２７が弾装されており、この圧縮コイルばね２７の弾発力によって押しボタン７は同図に示すように上方に付勢され、この状態でスイッチ５はＯＦＦになっている。この状態では、押しボタン７の頭部８によって導光体１５の光導出部１９の一部が覆われており、断面円弧状に形成された頭部８の中央部が筺体１の表面と略同位置に位置付けられている。   In the push button 7 slidably supported by the light guide 15, when the flange 11 is engaged with the engagement recess 17 of the light guide 15, the push button 7 is prevented from coming off from the light guide 15. The A compression coil spring 27 is elastically mounted between the head 8 of the push button 7 and the printed circuit board 4 as shown in FIG. 2A, and the push button is pressed by the elastic force of the compression coil spring 27. 7 is urged upward as shown in the figure, and in this state, the switch 5 is OFF. In this state, a part of the light guide part 19 of the light guide 15 is covered with the head 8 of the push button 7, and the central part of the head 8 formed in a circular arc shape is substantially the same as the surface of the housing 1. It is located at the same position.

この状態から押しボタン７を圧縮コイルばね２７の弾発力に抗して、図２（Ｂ）に示すように押下すると押圧部１４によって作動子５ａが押圧されてスイッチ５がＯＮになり、６個のＬＥＤ２５が発光する。この状態では、押しボタン７の頭部８によって一部が覆われていた導光体１５の光導出部１９の全体が開放される。ＬＥＤ２５から発光された光は、ＬＥＤ２５に対応する導光体１５の凹部２２から導光体１５内に導入される。導光体１５内に導入された光は、凹部２２が側面視において三角形に形成されているため、導光体１５内を円周方向に拡散するから、ＬＥＤ２５，２５間のＬＥＤ２５に対応していない部位にも光が導入される。   In this state, when the push button 7 is pressed against the elastic force of the compression coil spring 27 as shown in FIG. 2B, the actuator 5a is pressed by the pressing portion 14 and the switch 5 is turned ON. The LEDs 25 emit light. In this state, the entire light guide 19 of the light guide 15 that is partially covered by the head 8 of the push button 7 is opened. Light emitted from the LED 25 is introduced into the light guide 15 from the recess 22 of the light guide 15 corresponding to the LED 25. Since the light introduced into the light guide 15 diffuses in the circumferential direction in the light guide 15 because the concave portion 22 is formed in a triangular shape in a side view, it corresponds to the LED 25 between the LEDs 25 and 25. Light is also introduced to the part that is not present.

凹部２２から導光体１５内に導入された光は、導光体１５内を乱反射しながら光導出部１９から導出される。光導出部１９から導出される光は、光導出部１９が鉛直方向から角度αだけ傾斜するすり鉢状に形成されているため、角度βの範囲で斜め上方に放射される。このため、光導出部１９から放射された光は、押しボタン７の正面のみならず斜め方向からでも確認することができる。また、光導出部１９の表面に、導光体１５の円周方向に等間隔おいて連続する凸条体と凹状溝とによって形成された乱反射部２０が設けられているため、光導出部１９から放射される光が拡散されるから、光導出部１９の全体が略均一な光量で照明される。   The light introduced from the recess 22 into the light guide 15 is led out from the light deriving unit 19 while being irregularly reflected in the light guide 15. The light derived from the light deriving unit 19 is radiated obliquely upward in the range of the angle β because the light deriving unit 19 is formed in a mortar shape inclined by an angle α from the vertical direction. For this reason, the light radiated | emitted from the light derivation | leading-out part 19 can be confirmed not only from the front of the push button 7, but from the diagonal direction. Moreover, since the irregular surface part 20 formed by the convex stripe body and the concave groove | channel which continue at equal intervals in the circumferential direction of the light guide 15 is provided in the surface of the light derivation part 19, the light derivation part 19 Since the light emitted from the light is diffused, the entire light deriving unit 19 is illuminated with a substantially uniform light amount.

また、上述したように、導光体１５内に導入された光は、凹部２２が側面視において三角形に形成されているため、導光体１５内を円周方向に拡散し、ＬＥＤ２５，２５間でＬＥＤ２５に対応していない部位にも光が導入されるから、６個のＬＥＤ２５から発光された光が光導出部１９から略均一に放射される。   Further, as described above, the light introduced into the light guide 15 is diffused in the circumferential direction in the light guide 15 because the concave portion 22 is formed in a triangle in a side view, and between the LEDs 25 and 25. Thus, light is also introduced into a portion that does not correspond to the LED 25, and thus the light emitted from the six LEDs 25 is emitted from the light deriving unit 19 substantially uniformly.

なお、本実施の形態においては、押しボタン７に、押しボタン７の導光体１５からの抜けを規制する規制手段としてフランジ１１を設けたことにより、ＬＥＤ２５から発光された光がこのフランジ１１に遮断されないように、ＬＥＤ２５をフランジ１１に対応しない位置に設けているが、規制手段を押しボタン７の全周にわたって設けずに係合凸部等によって部分的に突設させた構造にすれば、ＬＥＤ２５を導光体１５の光導出部１９に対応させた位置に設けるようにしてもよい。   In the present embodiment, the flange 11 is provided on the push button 7 as a restricting means for restricting the push button 7 from being removed from the light guide 15, so that the light emitted from the LED 25 is applied to the flange 11. The LED 25 is provided at a position not corresponding to the flange 11 so as not to be blocked, but if the structure is such that the restricting means is not provided over the entire circumference of the push button 7 and is partially protruded by an engaging convex portion or the like, You may make it provide LED25 in the position corresponding to the light derivation | leading-out part 19 of the light guide 15. FIG.

本発明に係る押しボタンスイッチの照明構造を示す平面図である。It is a top view which shows the illumination structure of the pushbutton switch which concerns on this invention. 図１におけるII-II 線断面図であって、同図（Ａ）は押しボタンを押下していない状態を示し、同図（Ｂ）は押しボタンを押下した状態を示す。FIGS. 2A and 2B are cross-sectional views taken along the line II-II in FIG. 1, in which FIG. 1A shows a state where the push button is not pressed, and FIG. 図１におけるIII-III 線断面図である。It is the III-III sectional view taken on the line in FIG. 本発明に係る押しボタンスイッチの照明構造を示す底面図である。It is a bottom view which shows the illumination structure of the pushbutton switch which concerns on this invention. 本発明に係る押しボタンスイッチの照明構造に使用する押しボタンを示し、同図（Ａ）は平面図、同図（Ｂ）は正面図である。The pushbutton used for the illumination structure of the pushbutton switch which concerns on this invention is shown, The figure (A) is a top view, The figure (B) is a front view. 本発明に係る押しボタンスイッチの照明構造に使用する導光体を示し、同図（Ａ）は平面図、同図（Ｂ）は同図（Ａ）におけるVI（Ｂ）矢視図である。The light guide used for the illumination structure of the pushbutton switch which concerns on this invention is shown, The figure (A) is a top view, The figure (B) is VI (B) arrow view in the figure (A). 本発明に係る押しボタンスイッチの照明構造に使用するプリント基板の一部を示す平面図である。It is a top view which shows a part of printed circuit board used for the illumination structure of the pushbutton switch which concerns on this invention.

符号の説明Explanation of symbols

１…筺体、４…プリント基板、５…スイッチ、７…押しボタン、１１…フランジ（規制手段）、１２…回り止め用凹部（回り止め手段）、１５…導光体、１６…摺動孔、１７…係合凹部、１８…回り止め用凸部（回り止め手段）、１９…光導出部、２０…乱反射部、２２…凹部（光導入部）、２５…ＬＥＤ（光源）。
DESCRIPTION OF SYMBOLS 1 ... Housing, 4 ... Printed circuit board, 5 ... Switch, 7 ... Push button, 11 ... Flange (regulation means), 12 ... Depression for rotation prevention (rotation prevention means), 15 ... Light guide, 16 ... Sliding hole, DESCRIPTION OF SYMBOLS 17 ... Engagement recessed part, 18 ... Anti-rotation convex part (rotation prevention means), 19 ... Light derivation part, 20 ... Diffuse reflection part, 22 ... Concave part (light introduction part), 25 ... LED (light source).

Claims (1)

摺動自在に支持されスイッチをＯＮ・ＯＦＦする押しボタンと、この押しボタンの周囲に設けられ光源から発光された光を導光し押しボタンの周囲を照明する導光体とを備えた押しボタンスイッチの照明構造において、
前記押しボタンを摺動自在に支持するように前記導光体をリング状に形成し、
押しボタンに導光体からの抜けを規制する規制手段を設け、
前記導光体の内周縁に、導光体に導入された光を導出するすり鉢状に形成した光導出部を設け、
前記光源を導光体の円周方向に等間隔をおいて複数設け、前記光導入部の前記各光源に対応する部位に三角形に形成された凹部を設けたことを特徴とする押しボタンスイッチの照明構造。 A push button comprising a push button that is slidably supported to turn the switch on and off, and a light guide that is provided around the push button to guide light emitted from the light source and illuminate the periphery of the push button. In the lighting structure of the switch,
Forming the light guide in a ring shape so as to slidably support the push button;
The push button is provided with a restricting means for restricting removal from the light guide,
The inner periphery of the light guide is provided with a light derivation portion formed in a mortar shape that guides light introduced into the light guide,
A push button switch comprising a plurality of light sources arranged at equal intervals in a circumferential direction of a light guide, and a concave portion formed in a triangular shape in a portion corresponding to each light source of the light introducing portion . Lighting structure.
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