JP5526974B2 - Lighting device - Google Patents

Lighting device Download PDF

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JP5526974B2
JP5526974B2 JP2010099835A JP2010099835A JP5526974B2 JP 5526974 B2 JP5526974 B2 JP 5526974B2 JP 2010099835 A JP2010099835 A JP 2010099835A JP 2010099835 A JP2010099835 A JP 2010099835A JP 5526974 B2 JP5526974 B2 JP 5526974B2
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case body
lens
flange
light source
pressing
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JP2011191723A (en
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正雄 佐藤
善彦 阿部
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Nippon Seiki Co Ltd
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Nippon Seiki Co Ltd
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Description

本発明は、例えばヘッドアップディスプレイに搭載される液晶表示パネル（被照明部材）を照明するための照明装置に関するものである。   The present invention relates to an illuminating device for illuminating a liquid crystal display panel (illuminated member) mounted on, for example, a head-up display.

従来より、この種の照明装置にあっては、例えば下記特許文献１に記載されているものが知られている。この特許文献１に記載の照明装置は、ヘッドアップディスプレイに搭載され、回路基板としての基板上に光源（ＬＥＤ）が実装（配設）された光源ユニットと、この光源ユニットの前方側に配置され、光源からの照明光により照明される液晶表示パネル（被照明部材）と、基板と液晶表示パネルとの間に配置されるレンズ部材とを備えている。   Conventionally, as this kind of illumination device, for example, the one described in Patent Document 1 below is known. The illumination device described in Patent Document 1 is mounted on a head-up display, and is disposed on the front side of the light source unit in which a light source (LED) is mounted (arranged) on a circuit board. A liquid crystal display panel (illuminated member) illuminated by illumination light from a light source, and a lens member disposed between the substrate and the liquid crystal display panel.

特開２００６−１９０２７号公報JP 2006-19027 A

ところで、図９は、ヘッドアップディスプレイに搭載される液晶表示パネルを照明するための照明装置の従来技術を示している。この図９において、照明装置１００は、基板１１０上に光源１２０が実装された光源ユニット１３０と、この光源ユニット１３０の前方側に配置され、光源１２０からの照明光により照明される液晶表示パネル１４０と、基板１１０と液晶表示パネル１４０との間に配置されるレンズ部材１５０とを有している。   Incidentally, FIG. 9 shows a prior art of an illuminating device for illuminating a liquid crystal display panel mounted on a head-up display. In FIG. 9, the illumination device 100 includes a light source unit 130 in which a light source 120 is mounted on a substrate 110, and a liquid crystal display panel 140 that is disposed on the front side of the light source unit 130 and is illuminated by illumination light from the light source 120. And a lens member 150 disposed between the substrate 110 and the liquid crystal display panel 140.

この場合、レンズ部材１５０は、光源１２０からの照明光を集光させる凸レンズからなるレンズ部１５１と、このレンズ部１５１の周囲に延在する薄板状の一対のフランジ部１５２とを備え、フランジ部１５２を挟み込むように下側ケース体（第１のケース体）１６０と上側ケース体（第２のケース体）１７０とを用いて固定されている。   In this case, the lens member 150 includes a lens portion 151 made of a convex lens that condenses the illumination light from the light source 120 and a pair of thin plate-like flange portions 152 extending around the lens portion 151. The lower case body (first case body) 160 and the upper case body (second case body) 170 are fixed so as to sandwich 152.

下側ケース体１６０は、合成樹脂からなり、レンズ部材１５０の背後に配置され、一対のフランジ部１５２を背後から支持する略枠形状の支持部１６１と、この支持部１６１を取り囲むように支持部１６１の外側に位置する外壁部１６２と、支持部１６１の下端側と外壁部１６２の下端側とを連結する連結部１６３とを有し、略枠形状からなる支持部１６１の内部に形成された空洞部１６４を塞ぐように光源ユニット１３０が配設されている。   The lower case body 160 is made of a synthetic resin, is disposed behind the lens member 150, and has a substantially frame-shaped support portion 161 that supports the pair of flange portions 152 from the back, and a support portion that surrounds the support portion 161. 161 has an outer wall portion 162 positioned outside of 161, and a connecting portion 163 that connects the lower end side of the supporting portion 161 and the lower end side of the outer wall portion 162, and is formed inside the supporting portion 161 having a substantially frame shape. The light source unit 130 is disposed so as to close the cavity 164.

また、この場合、支持部１６１の上端部は平坦面となっており、外壁部１６２の上端側には上側ケース体１７０に設けられる後述する爪部を係合するための孔部１６５が形成されている。なお、下側ケース体１６０は、ヘッドアップディスプレイの外装ケースである遮光性合成樹脂材料からなるハウジングに適宜固定手段を用いて固定されている。   Further, in this case, the upper end portion of the support portion 161 is a flat surface, and a hole portion 165 for engaging a later-described claw portion provided in the upper case body 170 is formed on the upper end side of the outer wall portion 162. ing. The lower case body 160 is fixed to a housing made of a light-shielding synthetic resin material, which is an exterior case of the head-up display, using an appropriate fixing means.

一方、下側ケース体１６０と対をなす上側ケース体１７０は、合成樹脂からなり、レンズ部１５１に対応するように設けられる開口部１７１を有する基部１７２と、レンズ部材１５０の側方を取り囲むように基部１７２の下方に垂下形成され、下側ケース体１６０の支持部１６１と対をなす略枠形状の周壁部（壁部）１７３と、下側ケース体１６０の外壁部１６２と対をなすように基部１７２両端部から背後に垂下形成された一対の弾性腕片１７４とを有し、この場合、周壁部１７３の下端部は平坦面となっており、また各弾性腕片１７４の下端部には孔部１６５に係合する爪部１７５がそれぞれ設けられている。   On the other hand, the upper case body 170 that is paired with the lower case body 160 is made of synthetic resin, and surrounds the base portion 172 having an opening 171 provided so as to correspond to the lens portion 151 and the side of the lens member 150. Are formed below the base portion 172 to form a pair of a substantially frame-shaped peripheral wall portion (wall portion) 173 that forms a pair with the support portion 161 of the lower case body 160 and an outer wall portion 162 of the lower case body 160. The base 172 has a pair of elastic arm pieces 174 hanging downward from both ends thereof. In this case, the lower end portion of the peripheral wall portion 173 is a flat surface, and the lower end portion of each elastic arm piece 174 is Each has a claw portion 175 that engages with the hole portion 165.

そして、レンズ部材１５０を下側ケース体１６０と上側ケース体１７０とを用いて固定する場合には、例えば、まず支持部１６１の上端部と周壁部１７３の下端部との間にフランジ部１５２を位置させ、且つ、開口部１７１にレンズ部１５１が臨むようにようにレンズ部材１５０と下側ケース体１６０と上側ケース体１７０の三者を位置合わせし、次に下側ケース体１６０を上方（フランジ部１５２側）に平行移動させるとともに上側ケース体１７０を下方（フランジ部１５２側）に平行移動させる。   When the lens member 150 is fixed using the lower case body 160 and the upper case body 170, for example, first, the flange portion 152 is provided between the upper end portion of the support portion 161 and the lower end portion of the peripheral wall portion 173. The lens member 150, the lower case body 160, and the upper case body 170 are aligned so that the lens section 151 faces the opening 171. Next, the lower case body 160 is moved upward ( The upper case body 170 is translated downward (to the flange portion 152 side) while being translated to the flange portion 152 side.

すると、弾性腕片１７４に設けられた爪部１７５が外壁部１６２の孔部１６５に係合し、支持部１６１の上端部とフランジ部１５２の背面とが面接触するとともに周壁部１７３の下端部とフランジ部１５２の前面とが面接触することで、レンズ部材１５０が下側ケース体１６０と上側ケース体１７０とを用いて組み付け固定される。   Then, the claw portion 175 provided on the elastic arm piece 174 engages with the hole portion 165 of the outer wall portion 162, and the upper end portion of the support portion 161 and the rear surface of the flange portion 152 are in surface contact and the lower end portion of the peripheral wall portion 173. The lens member 150 is assembled and fixed using the lower case body 160 and the upper case body 170 by the surface contact between the front surface of the flange portion 152 and the front surface of the flange portion 152.

しかしながら、上述の図９に示した照明装置のように、弾性腕片１７４に設けられた爪部１７５を外壁部１６２の孔部１６５に係合させてレンズ部材１５０における薄板状のフランジ部１５２を下側ケース体１６０の支持部１６１と上側ケース体１７０の周壁部１７３とで挟み込む構成では、周壁部１７３とフランジ部１５２との面接触（または支持部１６１とフランジ部１５２との面接触）に伴いフランジ部１５２にはフランジ部１５２の板厚方向に沿い応力が作用し、例えばレンズ部材１５０をシクロオレフィンポリマー（ＣＯＰ）によって形成した場合には前記応力によってフランジ部１５２が変形することに起因してレンズ部１５１が歪み、被照明部材である液晶表示パネルの照明品質低下を招く虞がある。
そこで本発明は、前述の課題に対して対処するため、レンズ部の歪みを抑制し、被照明部材の照明品質が低下する虞のない照明装置の提供を目的とするものである。 However, like the lighting device shown in FIG. 9 described above, the claw portion 175 provided on the elastic arm piece 174 is engaged with the hole portion 165 of the outer wall portion 162 so that the thin plate-like flange portion 152 in the lens member 150 is formed. In the configuration sandwiched between the support portion 161 of the lower case body 160 and the peripheral wall portion 173 of the upper case body 170, the surface contact between the peripheral wall portion 173 and the flange portion 152 (or the surface contact between the support portion 161 and the flange portion 152). Accordingly, a stress acts on the flange portion 152 along the thickness direction of the flange portion 152. For example, when the lens member 150 is formed of cycloolefin polymer (COP), the flange portion 152 is deformed by the stress. Then, the lens unit 151 may be distorted, resulting in a deterioration in illumination quality of the liquid crystal display panel that is a member to be illuminated.
Therefore, in order to address the above-described problems, an object of the present invention is to provide an illumination device that suppresses distortion of a lens portion and does not cause a decrease in illumination quality of a member to be illuminated.

本発明は、基板に光源が配設された光源ユニットと、前記光源ユニットの前方側に配置され、前記光源からの照明光により照明される被照明部材と、前記光源ユニットと前記被照明部材との間に配置され、前記光源からの照明光を集光させる第１レンズ部と前記第１レンズ部の周囲に延在する第１フランジ部とを有する第１レンズ部材と、前記第１フランジ部を支持する第１支持部を有する第１のケース体と、前記第１レンズ部に対応するように設けられる開口部を有する基部と前記第１レンズ部を取り囲むように前記基部に形成された第１壁部とを有する第２のケース体とを備えてなる照明装置において、前記第１フランジ部には前記第１壁部と前記第１支持部のうち少なくとも一方に設けられた第１押圧部と当接する第１当接部が設けられ、前記第１フランジ部を前記第１支持部と前記第１壁部とで挟み込むように前記第１のケース体と前記第２のケース体とを固定したとき、前記第１押圧部からの押圧力を前記第１当接部に作用させる構成とし、前記第１のケース体は、前記光源ユニットと前記第１レンズ部材との間に位置するように前記第１支持部に一体形成された水平壁部を有し、前記水平壁部に設けられた貫通孔部を塞ぐように拡散部材が載置されていることを特徴とする。 The present invention includes a light source unit in which a light source is disposed on a substrate, an illuminated member that is disposed on the front side of the light source unit and is illuminated by illumination light from the light source, the light source unit, and the illuminated member. A first lens member disposed between and having a first lens part for condensing illumination light from the light source and a first flange part extending around the first lens part, and the first flange part A first case body having a first support portion for supporting the first lens portion; a base portion having an opening provided to correspond to the first lens portion; and a first portion formed on the base portion so as to surround the first lens portion. A lighting device comprising a second case body having one wall portion, wherein the first flange portion is provided with at least one of the first wall portion and the first support portion on the first flange portion. Provided with a first abutting portion that abuts When the first case body and the second case body are fixed so that the first flange portion is sandwiched between the first support portion and the first wall portion, the pressing from the first pressing portion is performed. The pressure is applied to the first contact portion, and the first case body is formed integrally with the first support portion so as to be positioned between the light source unit and the first lens member. It has a wall part and the diffusion member is mounted so that the through-hole part provided in the said horizontal wall part may be plugged up.

また本発明は、前記第１当接部は、前記第１フランジ部に形成された面取り部であることを特徴とする。   In the invention, it is preferable that the first contact portion is a chamfered portion formed in the first flange portion.

また本発明は、前記第１レンズ部材と前記被照明部材との間に配置される第２レンズ部材は、前記第１レンズ部からの照明光を集光させる第２レンズ部と、前記第２レンズ部の周囲に延在する第２フランジ部とを備え、前記第１のケース体は前記第２フランジ部を支持する第２支持部を有しているいるとともに前記第２のケース体は前記第２レンズ部を取り囲むように前記基部に形成された第２壁部を有し、前記第２フランジ部には前記第２壁部に設けられた第２押圧部と当接する第２当接部が設けられ、前記第２フランジ部を前記第２支持部と前記第２壁部とで挟み込むように前記第１のケース体と前記第２のケース体とを固定したとき、前記第２押圧部からの押圧力を前記第２当接部に作用させる構成としたことを特徴とする。   According to the present invention, the second lens member disposed between the first lens member and the illuminated member includes a second lens unit that condenses illumination light from the first lens unit, and the second lens unit. A second flange portion extending around the lens portion, wherein the first case body has a second support portion for supporting the second flange portion, and the second case body is A second abutting portion having a second wall portion formed on the base portion so as to surround the second lens portion, and abutting a second pressing portion provided on the second wall portion on the second flange portion. When the first case body and the second case body are fixed so that the second flange portion is sandwiched between the second support portion and the second wall portion, the second pressing portion It is characterized by the fact that the pressing force from is applied to the second contact portion.

また本発明は、前記第２当接部は、前記第２フランジ部に形成された面取り部であることを特徴とする。   In the invention, it is preferable that the second contact portion is a chamfered portion formed in the second flange portion.

本発明によれば、初期の目的を達成でき、レンズ部の歪みを抑制し、被照明部材の照明品質が低下する虞のない照明装置を提供できる。   ADVANTAGE OF THE INVENTION According to this invention, the initial objective can be achieved, the distortion of a lens part can be suppressed, and the illuminating device without a possibility that the illumination quality of a to-be-illuminated member may fall can be provided.

本発明の第１実施形態によるヘッドアップディスプレイ装置の概略図。1 is a schematic view of a head-up display device according to a first embodiment of the present invention. 同実施形態による表示装置の断面図。Sectional drawing of the display apparatus by the embodiment. 同実施形態による照明装置の断面図。Sectional drawing of the illuminating device by the embodiment. 図３中、Ａ部を拡大して示す拡大断面図。The expanded sectional view which expands and shows the A section in FIG. 本発明の第２実施形態による照明装置の断面図。Sectional drawing of the illuminating device by 2nd Embodiment of this invention. 本発明の第３実施形態による照明装置の断面図。Sectional drawing of the illuminating device by 3rd Embodiment of this invention. 図６中、Ｂ部を拡大して示す拡大断面図。The expanded sectional view which expands and shows the B section in FIG. 図６中、Ｃ部を拡大して示す拡大断面図。The expanded sectional view which expands and shows the C section in FIG. 従来技術による照明装置の断面図。Sectional drawing of the illuminating device by a prior art.

（第１実施形態）以下、図１〜図４に基づいて、本発明を車両用のヘッドアップディスプレイ装置に適用した一実施形態を説明する。 (First Embodiment) An embodiment in which the present invention is applied to a head-up display device for a vehicle will be described below with reference to FIGS.

ヘッドアップディスプレイ装置は、図１に示すように車両１０のインパネ１１内部に配設された表示ユニットである表示装置１２が投射する表示光Ｌを投影部材である車両１０のフロントガラス１３で車両１０の運転者（利用者）１４の方向に反射させ、虚像Ｖの表示を行うものである。換言すれば、車両用ヘッドアップディスプレイ装置は、表示装置１２の後述する表示器から発せられる表示光Ｌをフロントガラス１３（前記投影部材）に照射（投射）し、この照射によって得られた虚像（表示像）Ｖを運転者１４に視認させるものである。これにより運転者１４は、運転席の正面前方に表示される虚像Ｖを風景と重畳させて観察することができる。   As shown in FIG. 1, the head-up display device uses the windshield 13 of the vehicle 10 that is a projection member to project the display light L that is projected by the display device 12 that is a display unit disposed inside the instrument panel 11 of the vehicle 10. The virtual image V is displayed by reflecting in the direction of the driver (user) 14. In other words, the vehicle head-up display device irradiates (projects) the front glass 13 (the projection member) with the display light L emitted from a display unit (to be described later) of the display device 12, and the virtual image ( Display image) V is visually recognized by the driver 14. Thus, the driver 14 can observe the virtual image V displayed in front of the driver's seat in a superimposed manner with the scenery.

表示装置１２は、図２に示すように照明装置である表示器２０と、反射器３０と、ハウジング４０とから主に構成されている。   As shown in FIG. 2, the display device 12 mainly includes a display device 20 that is a lighting device, a reflector 30, and a housing 40.

表示器２０は、図３に詳しく示すように、基板である回路基板２１上に複数個（例えば２個）の光源２２が実装（配設）された光源ユニット２３と、各光源２２からの照明光により透過照明される被照明部材である液晶表示パネル２４と、光源ユニット２３と液晶表示パネル２４との間に配置される拡散部材２５と、この拡散部材２５（光源ユニット２３）と液晶表示パネル２４との間に配置されるレンズ部材２６と、拡散部材２５及びレンズ部材２６を保持する第１のケース体２７と、この第１のケース体２７の前方側に配置される第２のケース体２８とを備えている。   As shown in detail in FIG. 3, the display 20 includes a light source unit 23 in which a plurality of (for example, two) light sources 22 are mounted (arranged) on a circuit board 21 that is a substrate, and illumination from each light source 22. A liquid crystal display panel 24 that is a member to be illuminated by light, a diffusion member 25 disposed between the light source unit 23 and the liquid crystal display panel 24, the diffusion member 25 (light source unit 23), and the liquid crystal display panel 24, a first case body 27 that holds the diffusing member 25 and the lens member 26, and a second case body that is disposed in front of the first case body 27. 28.

回路基板２１は、例えば所定の配線パターンが施された硬質の配線基板からなり、前記配線パターン上に各光源２２が搭載されている。   The circuit board 21 is made of, for example, a hard wiring board provided with a predetermined wiring pattern, and each light source 22 is mounted on the wiring pattern.

光源２２は、例えば適宜色を発するチップ型発光ダイオード（ＬＥＤ）からなり、拡散部材２５（液晶表示パネル２４）に照明光を供給する発光体である。   The light source 22 is, for example, a chip-type light emitting diode (LED) that emits an appropriate color, and is a light emitter that supplies illumination light to the diffusion member 25 (the liquid crystal display panel 24).

液晶表示パネル２４は、例えば一対の透光性基板に液晶を封入した液晶セルの前後面に偏光膜を各々設けたＴＦＴ（薄膜トランジスタ）型の液晶表示素子からなり、各光源２２からの照明光（換言すればレンズ部材２６から出射される平行出射光）を透過して表示光Ｌを形成する（発する）ように光源ユニット２３（レンズ部材２６）の前方側に配置されている。   The liquid crystal display panel 24 is composed of a TFT (thin film transistor) type liquid crystal display element in which a polarizing film is provided on the front and rear surfaces of a liquid crystal cell in which liquid crystal is sealed in a pair of translucent substrates, for example, and illumination light ( In other words, it is arranged on the front side of the light source unit 23 (lens member 26) so as to transmit (parallel emission light emitted from the lens member 26) and form (emerge) display light L.

かかる液晶表示パネル２４は、車両１０に設けられる車速センサやエンジン回転センサからの出力信号に基づいて車速，エンジン回転数を計測する演算回路（図示せず）並びにこの演算結果に基づいて前記液晶を駆動する駆動回路（図示せず）によって、車両１０の速度またはエンジン回転数の計測値を数値として表示することができる。   The liquid crystal display panel 24 includes an arithmetic circuit (not shown) for measuring the vehicle speed and the engine speed based on output signals from a vehicle speed sensor and an engine rotation sensor provided in the vehicle 10, and the liquid crystal based on the calculation result. A measured value of the speed of the vehicle 10 or the engine speed can be displayed as a numerical value by a driving circuit (not shown) for driving.

なお、液晶表示パネル２４によって表示される表示情報は、車速やエンジン回転数に限らず任意であり、例えば走行距離情報、ナビゲーション情報、外気温情報であってもよい。   The display information displayed by the liquid crystal display panel 24 is not limited to the vehicle speed and the engine speed, and may be travel distance information, navigation information, and outside air temperature information, for example.

拡散部材２５は、例えば乳白色を有する光透過性の合成樹脂からなり、略平板状に形成され、第１のケース体２７の後述する仕切部に設けられる貫通孔部を塞ぐように前記仕切部上に載置されている。かかる拡散部材２５は、各光源２２から発せられ、レンズ部材２６側へと向かう照明光を略均一に拡散させるための光拡散板としての機能を有している。   The diffusing member 25 is made of, for example, a milky white light-transmitting synthetic resin, is formed in a substantially flat plate shape, and is formed on the partition portion so as to close a through hole portion provided in a partition portion described later of the first case body 27. Is placed. The diffusing member 25 has a function as a light diffusing plate for diffusing illumination light emitted from each light source 22 toward the lens member 26 side substantially uniformly.

レンズ部材２６は、ＣＯＰ等の透光性合成樹脂からなり、背面側（拡散部材２５側）が平坦面であるとともに前面側（液晶表示パネル２４側）が凸面である凸レンズからなるレンズ部２６ａと、このレンズ部２６ａの周囲に延在する薄板状の一対のフランジ部２６ｂとを備え、レンズ部２６ａは、光源２２からの照明光（拡散部材２５から出射される拡散出射光）を集光させる集光部としての機能を有している。なお、レンズ部材２６、レンズ部２６ａ、フランジ部２６ｂは、特許請求の範囲の請求項１における第１レンズ部材、第１レンズ部は、第１フランジ部にそれぞれ相当する。   The lens member 26 is made of a light-transmitting synthetic resin such as COP, and has a lens portion 26a formed of a convex lens having a flat back surface (on the diffusion member 25 side) and a convex surface on the front side (liquid crystal display panel 24 side). And a pair of thin plate-like flange portions 26b extending around the lens portion 26a, and the lens portion 26a condenses illumination light from the light source 22 (diffused outgoing light emitted from the diffusion member 25). It has a function as a condensing part. The lens member 26, the lens portion 26a, and the flange portion 26b correspond to the first lens member and the first lens portion in Claim 1 of the claims, respectively.

つまり、レンズ部２６ａは、前記拡散出射光に対し所望の屈折を与え、略平行光束化された前記平行出射光を液晶表示パネル２４側に向けて出射するようになっている。また、各フランジ部２６ｂの上端側角部にはＣ面取り加工が施された面取り部２６ｃが設けられている。なお、この面取り部２６ｃは、特許請求の範囲の請求項１における第１当接部に相当する。   That is, the lens portion 26a gives desired refraction to the diffused emitted light, and emits the parallel emitted light that is formed into a substantially parallel light beam toward the liquid crystal display panel 24 side. In addition, a chamfered portion 26c that has been subjected to C-chamfering processing is provided at the upper corner portion of each flange portion 26b. The chamfered portion 26c corresponds to a first contact portion in claim 1 of the claims.

第１のケース体２７は、合成樹脂からなり、レンズ部材２６の背後に配置され、一対のフランジ部２６ｂを背後から支持する略枠形状の支持部２７ａと、この略枠形状からなる支持部２７ａの内部空間を上側空間部Ｓ１と下側空間部Ｓ２とに区画するための壁状の仕切部２７ｂと、支持部２７ａを取り囲むように支持部２７ａの外側に位置する外壁部２７ｃと、支持部２７ａの下端側と外壁部２７ｃの下端側とを連結する連結部２７ｄとを備えている。なお、支持部２７ａは、特許請求の範囲の請求項１における第１支持部に相当する。   The first case body 27 is made of a synthetic resin, is disposed behind the lens member 26, and has a substantially frame-shaped support portion 27a that supports the pair of flange portions 26b from the back, and a support portion 27a having the substantially frame shape. A wall-shaped partition portion 27b for partitioning the internal space into an upper space portion S1 and a lower space portion S2, an outer wall portion 27c positioned outside the support portion 27a so as to surround the support portion 27a, and a support portion 27 d of connecting parts which connect the lower end side of 27a and the lower end side of outer wall part 27c are provided. The support portion 27a corresponds to the first support portion in claim 1 of the claims.

そして、仕切部２７ｂの略中央部には上側空間部Ｓ１と下側空間部Ｓ２とを連通させるための貫通孔部２７ｅが設けられ、この貫通孔部２７ｅを塞ぐように仕切部２７ｂ上に拡散部材２５が載置されている。また、拡散部材２５に光源２２からの照明光を供給すべく、下側空間部Ｓ２を塞ぐように光源ユニット２３が配設されている。   A through hole portion 27e for communicating the upper space portion S1 and the lower space portion S2 is provided at a substantially central portion of the partition portion 27b, and diffuses on the partition portion 27b so as to close the through hole portion 27e. A member 25 is placed. In addition, a light source unit 23 is disposed so as to block the lower space S <b> 2 in order to supply illumination light from the light source 22 to the diffusing member 25.

なお、本実施形態の場合、支持部２７ａの上端部は平坦面Ｐとなっており、外壁部２７ｃの上端側には第２のケース体２８に設けられる後述する爪部を係合するための孔部２７ｆが形成されている。また、第１のケース体２７は、ハウジング４０に適宜固定手段を用いて固定されている。   In the case of the present embodiment, the upper end portion of the support portion 27a has a flat surface P, and the upper end side of the outer wall portion 27c is engaged with a claw portion described later provided in the second case body 28. A hole 27f is formed. In addition, the first case body 27 is fixed to the housing 40 using an appropriate fixing means.

第２のケース体２８は、合成樹脂からなり、レンズ部２６ａに対応するように設けられる開口部２８ａを有する基部２８ｂと、レンズ部材２６の側方を取り囲むように基部２８ｂの下方に垂下形成され、第１のケース体２７の支持部２７ａと対をなす略枠形状の周壁部（壁部）２８ｃと、第１のケース体２７の外壁部２７ｃと対をなすように基部２８ｂ両端部から背後に垂下形成された一対の弾性腕片２８ｄとを備えている。なお、周壁部である壁部２８ｃは、特許請求の範囲の請求項１における第１壁部に相当する。   The second case body 28 is made of synthetic resin, and is formed below the base portion 28b so as to surround the side portion of the lens member 26 and a base portion 28b having an opening portion 28a provided so as to correspond to the lens portion 26a. The rear portion from both ends of the base portion 28b so as to make a pair with the substantially wall-shaped peripheral wall portion (wall portion) 28c paired with the support portion 27a of the first case body 27 and the outer wall portion 27c of the first case body 27. And a pair of elastic arm pieces 28d formed in a suspended manner. In addition, the wall part 28c which is a surrounding wall part is equivalent to the 1st wall part in Claim 1 of a claim.

そして、本実施形態の場合、周壁部２８ｃの下端部には、レンズ部材２６のフランジ部２６ｂに設けられた面取り部２６ｃと向かい合うように押圧部２８ｅが設けられ、各弾性腕片２８ｄの下端部には孔部２７ｆに係合する爪部２８ｆがそれぞれ設けられている。   In the case of this embodiment, a pressing portion 28e is provided at the lower end portion of the peripheral wall portion 28c so as to face the chamfered portion 26c provided on the flange portion 26b of the lens member 26, and the lower end portion of each elastic arm piece 28d. Each has a claw portion 28f that engages with the hole portion 27f.

押圧部２８ｅは、周壁部２８ｃ内壁面と周壁部２８ｃ底面との境界部分に設けられた所定の曲率を有する曲面部からなり、後述するようにフランジ部２６ｂを支持部２７ａと周壁部２８ｃとで挟み込むように第１のケース体２７と第２のケース体２８とを組み付け固定した際に、Ｃ面取り加工が施された当接部である面取り部２６ｃと当接し、面取り部２６ｃに押圧力を作用させる機能を有している。なお、押圧部２８ｅは、特許請求の範囲の請求項１における第１押圧部に相当する。   The pressing portion 28e is a curved surface portion having a predetermined curvature provided at a boundary portion between the inner wall surface of the peripheral wall portion 28c and the bottom surface of the peripheral wall portion 28c. As will be described later, the flange portion 26b is formed by the support portion 27a and the peripheral wall portion 28c. When the first case body 27 and the second case body 28 are assembled and fixed so as to be sandwiched, they come into contact with the chamfered portion 26c, which is a contact portion that has been subjected to C chamfering, and a pressing force is applied to the chamfered portion 26c. Has a function to act. The pressing portion 28e corresponds to the first pressing portion in claim 1 of the claims.

そして、レンズ部材２６を第１のケース体２７と第２のケース体２８とを用いて固定する（つまりフランジ部２６ｂを支持部２７ａと周壁部２８ｃとで挟み込むように第１のケース体２７と第２のケース体２８とを固定する）場合には、例えば詳細図示は省略するが、まず支持部２７ａの上端部と周壁部２８ｃの下端部との間にフランジ部２６ｂを位置させ、且つ、開口部２８ａにレンズ部２６ａが臨むようにようにレンズ部材２６と第１のケース体２７と第２のケース体２８の三者を位置合わせし、次に第１のケース体２７を上方（フランジ部２６ｂ側）に平行移動させるとともに第２のケース体２８を下方（フランジ部２６ｂ側）に平行移動させる。   Then, the lens member 26 is fixed using the first case body 27 and the second case body 28 (that is, the first case body 27 and the flange portion 26b are sandwiched between the support portion 27a and the peripheral wall portion 28c). In the case of fixing the second case body 28), for example, although detailed illustration is omitted, first, the flange portion 26b is positioned between the upper end portion of the support portion 27a and the lower end portion of the peripheral wall portion 28c, and The lens member 26, the first case body 27, and the second case body 28 are aligned so that the lens portion 26a faces the opening 28a, and then the first case body 27 is moved upward (flange). And the second case body 28 is translated downward (to the flange portion 26b side).

すると、弾性腕片２８ｄに設けられた爪部２８ｆが外壁部２７ｃの孔部２７ｆに係合し、支持部２７ａの上端部（つまり平坦面Ｐ）とフランジ部２６ｂの背面とが面接触するとともに、周壁部２８ｃの下端部に設けられた押圧部２８ｅとフランジ部２６ｂに設けられた面取り部２６ｃとが当接した状態で、レンズ部材２６が第１のケース体２７と第２のケース体２８とを用いて組み付け固定される（換言すればフランジ部２６ｂを支持部２７ａと周壁部２８ｃとで挟み込むように第１のケース体２７と第２のケース体２８とが組み付け固定される）。   Then, the claw portion 28f provided on the elastic arm piece 28d is engaged with the hole portion 27f of the outer wall portion 27c, and the upper end portion (that is, the flat surface P) of the support portion 27a and the back surface of the flange portion 26b are in surface contact. The lens member 26 has the first case body 27 and the second case body 28 in a state where the pressing portion 28e provided at the lower end portion of the peripheral wall portion 28c and the chamfered portion 26c provided at the flange portion 26b are in contact with each other. (In other words, the first case body 27 and the second case body 28 are assembled and fixed so that the flange portion 26b is sandwiched between the support portion 27a and the peripheral wall portion 28c).

ここで、周壁部２８ｃとフランジ部２６ｂとに着目すると、周壁部２８ｃに設けられた曲面部からなる押圧部２８ｅが、押圧部２８ｅと向かい合うようにフランジ部２６ｂに設けられた傾斜面からなる面取り部２６ｃと当接することに伴い、図３中、Ａ部を拡大して示す図４に示すごとく面取り部２６ｃには面取り部２６ｃに対し垂直方向（つまり図４中、右斜め下方向）に押圧部２８ｅからの押圧力Ｆが作用する。   Here, when paying attention to the peripheral wall portion 28c and the flange portion 26b, the pressing portion 28e made of a curved surface provided on the peripheral wall portion 28c is chamfered by an inclined surface provided on the flange portion 26b so as to face the pressing portion 28e. As shown in FIG. 4, which is an enlarged view of the portion A in FIG. 3, the chamfered portion 26 c is pressed in a direction perpendicular to the chamfered portion 26 c (that is, diagonally downward to the right in FIG. 4). The pressing force F from the part 28e acts.

このとき、傾斜面からなる面取り部２６ｃに作用する押圧力Ｆは、フランジ部２６ｂの板面方向に沿って作用する水平分力Ｆ１と、フランジ部２６ｂの板厚方向に作用する垂直分力Ｆ２とに分散される。このため、本実施形態によれば、フランジ部２６ｂを支持部２７ａと周壁部２８ｃとで挟み込むように第１のケース体２７と第２のケース体２８とを固定したとき、フランジ部２６ｂの変形に寄与することになるフランジ部２６ｂの板厚方向に働く力は、水平分力Ｆ１が分散される分だけ従来の場合よりも小さくなる。   At this time, the pressing force F acting on the chamfered portion 26c made of an inclined surface includes a horizontal component force F1 acting along the plate surface direction of the flange portion 26b and a vertical component force F2 acting on the plate thickness direction of the flange portion 26b. And distributed. Therefore, according to the present embodiment, when the first case body 27 and the second case body 28 are fixed so that the flange portion 26b is sandwiched between the support portion 27a and the peripheral wall portion 28c, the deformation of the flange portion 26b. The force acting in the plate thickness direction of the flange portion 26b that contributes to is smaller than the conventional case by the amount of the horizontal component force F1 being dispersed.

すなわち、水平分力Ｆ１と垂直分力Ｆ２のうち、水平分力Ｆ１はフランジ部２６ｂの板厚方向に何ら作用しないので、フランジ部２６ｂの変形に影響を与えることになるフランジ部２６ｂの板厚方向に働く力は、水平分力Ｆ１の分だけ従来と比べて小さくなり、これによりレンズ部材２６をＣＯＰによって形成した場合であっても、フランジ部２６ｂの変形（つまりレンズ部２６ａの歪み）を抑制することが可能となり、液晶表示パネル２４の照明品質が低下する招く虞はなくなる。   That is, since the horizontal component force F1 of the horizontal component force F1 and the vertical component force F2 does not act at all in the plate thickness direction of the flange portion 26b, the plate thickness of the flange portion 26b that affects the deformation of the flange portion 26b. The force acting in the direction is smaller than the conventional force by the horizontal component force F1, so that even when the lens member 26 is formed by COP, deformation of the flange portion 26b (that is, distortion of the lens portion 26a) is caused. Therefore, there is no possibility that the illumination quality of the liquid crystal display panel 24 will deteriorate.

反射器３０は、液晶表示パネル２４から発せられた表示光Ｌを反射させる凹面鏡（反射部材）３１と、この凹面鏡３１を保持する合成樹脂からなるミラーホルダ（保持部材）３２とを備えてなる。   The reflector 30 includes a concave mirror (reflecting member) 31 that reflects the display light L emitted from the liquid crystal display panel 24, and a mirror holder (holding member) 32 made of a synthetic resin that holds the concave mirror 31.

凹面鏡３１は、凹面を有するポリカーボネートからなる樹脂基板に反射層３１ａを蒸着形成してなるものである。かかる凹面鏡３１は、その反射層３１ａが液晶表示パネル２４並びにハウジング４０の後述する透光性カバーに対向し、前記透光性カバーから臨める位置に傾斜状態にて配設される。   The concave mirror 31 is formed by depositing a reflective layer 31a on a resin substrate made of polycarbonate having a concave surface. The concave mirror 31 is disposed in an inclined state at a position where the reflective layer 31a faces a translucent cover (to be described later) of the liquid crystal display panel 24 and the housing 40 and faces the translucent cover.

また凹面鏡３１は、表示器２０からの表示光Ｌを拡大しつつ、前記透光性カバー（車両１０のフロントガラス１３）側へ反射させるものである。このことは、凹面鏡３１が、表示器２０から発せられる表示光Ｌを拡大し、この拡大された表示光Ｌを前記透光性カバーを通じてフロントガラス１３に投射することを意味している。なお、凹面鏡３１は、ミラーホルダ３２に両面粘着テープにより接着されている。   The concave mirror 31 is for reflecting the display light L from the display device 20 toward the translucent cover (the windshield 13 of the vehicle 10) while enlarging it. This means that the concave mirror 31 enlarges the display light L emitted from the display device 20 and projects the enlarged display light L onto the windshield 13 through the translucent cover. The concave mirror 31 is bonded to the mirror holder 32 with a double-sided adhesive tape.

ハウジング４０は、例えば黒色の遮光性合成樹脂材料からなり、略箱型形状に形成され、その内部空間である空間部４１に表示器２０及び反射器３０を保持して収容するものであり、反射器３０における凹面鏡３１の配設位置の上部（フロントガラス１３側）が開口する開口窓部４２を備えてなる。   The housing 40 is made of, for example, a black light-shielding synthetic resin material, and is formed in a substantially box shape. The housing 40 holds the display device 20 and the reflector 30 in the space portion 41 that is an internal space of the housing 40. An opening window portion 42 is provided in which an upper portion (front glass 13 side) of the arrangement position of the concave mirror 31 in the container 30 is opened.

またハウジング４０には、開口窓部４２を塞ぐように出射部である透光性カバー４３が配設されてなる。かかる透光性カバー４３は、透光性の合成樹脂材料（例えばアクリル樹脂）からなり、凹面鏡３１で反射された表示光Ｌが透過（通過）する光透過性部材としての機能を有している。つまり、凹面鏡３１によって反射された表示光Ｌは、ハウジング４０に形成された透光性カバー４３を通じてフロントガラス１３に照射され、この照射によって得られた虚像Ｖを運転者１４が視認することになる。   Further, the housing 40 is provided with a translucent cover 43 that is an emission part so as to close the opening window 42. The translucent cover 43 is made of a translucent synthetic resin material (for example, acrylic resin) and has a function as a light transmissive member that transmits (passes) the display light L reflected by the concave mirror 31. . That is, the display light L reflected by the concave mirror 31 is applied to the windshield 13 through the translucent cover 43 formed in the housing 40, and the driver 14 visually recognizes the virtual image V obtained by this irradiation. .

以上のように本実施形態では、回路基板２１に光源２２が実装（配設）された光源ユニット２３と、この光源ユニット２３の前方側に配置され、光源２２からの照明光により照明される液晶表示パネル２４と、光源ユニット２３と液晶表示パネル２４との間に配置され、光源２２からの照明光を集光させるレンズ部２６ａとレンズ部２６ａの周囲に延在するフランジ部２６ｂとを有するレンズ部材２６と、フランジ部２６ｂを支持する支持部２７ａを有する第１のケース体２７と、レンズ部２６ａに対応するように設けられる開口部２８ａを有する基部２８ｂとレンズ部２６ａを取り囲むように基部２８ｂに形成された周壁部２８ｃとを有する第２のケース体２８とを備えてなる照明装置において、
フランジ部２６ｂには周壁部２８ｃに設けられた押圧部２８ｅと当接する面取り部２６ｃが設けられ、フランジ部２６ｂを支持部２７ａと周壁部２８ｃとで挟み込むように第１のケース体２７と第２のケース体２８とを固定したとき、押圧部２８ｅからの押圧力Ｆを面取り部２６ｃに作用させる構成としたものである。 As described above, in the present embodiment, the light source unit 23 in which the light source 22 is mounted (arranged) on the circuit board 21 and the liquid crystal that is disposed on the front side of the light source unit 23 and is illuminated by the illumination light from the light source 22. A lens that is disposed between the display panel 24, the light source unit 23, and the liquid crystal display panel 24 and that condenses the illumination light from the light source 22 and a flange portion 26b that extends around the lens portion 26a. A base portion 28b surrounding the member 26, a first case body 27 having a support portion 27a for supporting the flange portion 26b, a base portion 28b having an opening portion 28a provided so as to correspond to the lens portion 26a, and the lens portion 26a. In a lighting device comprising a second case body 28 having a peripheral wall portion 28c formed in
The flange portion 26b is provided with a chamfered portion 26c that comes into contact with the pressing portion 28e provided on the peripheral wall portion 28c. The first case body 27 and the second case body 27 are sandwiched between the support portion 27a and the peripheral wall portion 28c. When the case body 28 is fixed, the pressing force F from the pressing portion 28e is applied to the chamfered portion 26c.

従って、面取り部２６ｃに作用する押圧力Ｆは、前述したようにフランジ部２６ｂの板面方向に沿って作用する水平分力Ｆ１と、フランジ部２６ｂの板厚方向に作用する垂直分力Ｆ２とに分散され、これら水平分力Ｆ１と垂直分力Ｆ２のうち、水平分力Ｆ１はフランジ部２６ｂの板厚方向に何ら作用しないので、フランジ部２６ｂの変形に影響を与えることになるフランジ部２６ｂの板厚方向に働く力は、水平分力Ｆ１の分だけ従来と比べて小さくなり、これによりレンズ部材２６をＣＯＰによって形成した場合であっても、フランジ部２６ｂの変形（つまりレンズ部２６ａの歪み）を抑制することが可能となり、液晶表示パネル２４の照明品質が低下する招く虞はなくなる。   Accordingly, the pressing force F acting on the chamfered portion 26c is, as described above, the horizontal component force F1 acting along the plate surface direction of the flange portion 26b, and the vertical component force F2 acting on the plate thickness direction of the flange portion 26b. Among these horizontal component force F1 and vertical component force F2, the horizontal component force F1 does not act at all in the plate thickness direction of the flange portion 26b, so that it affects the deformation of the flange portion 26b. The force acting in the plate thickness direction is smaller than the conventional force by the horizontal component force F1, so that even when the lens member 26 is formed by COP, the deformation of the flange portion 26b (that is, the lens portion 26a) (Distortion) can be suppressed, and there is no possibility that the illumination quality of the liquid crystal display panel 24 will deteriorate.

また本実施形態では、フランジ部２６ｂを支持部２７ａと周壁部２８ｃとで挟み込むように第１のケース体２７と第２のケース体２８とを固定したとき、所定の曲率を有する曲面形状からなる押圧部２８ｅがＣ面取り加工の施された傾斜面からなる面取り部２６ｃと当接することに伴い、押圧部２８ｅからの押圧力Ｆが面取り部２６ｃに作用する例について説明したが、押圧部２８ｅ及び面取り部２６ｃの形状は、面取り部２６ｃと垂直方向に押圧力Ｆが働く構成であればあらゆる形状を採用することができ、例えば押圧部２８ｅを傾斜面とするとともに面取り部２６ｃをＲ面取り加工の施されたＲ面（曲面）としてもよいし、もしくは押圧部２８ｅ及び面取り部２６ｃの両者を傾斜面形状または曲面形状としてもよい。   Moreover, in this embodiment, when the 1st case body 27 and the 2nd case body 28 are fixed so that the flange part 26b may be pinched | interposed by the support part 27a and the surrounding wall part 28c, it consists of a curved surface shape which has a predetermined curvature. The example in which the pressing force F from the pressing portion 28e acts on the chamfered portion 26c as the pressing portion 28e comes into contact with the chamfered portion 26c formed of the inclined surface subjected to the C chamfering processing has been described. Any shape can be adopted as the shape of the chamfered portion 26c as long as the pressing force F acts in a direction perpendicular to the chamfered portion 26c. For example, the pressing portion 28e is an inclined surface and the chamfered portion 26c is subjected to R chamfering. The applied R surface (curved surface) may be used, or both the pressing portion 28e and the chamfered portion 26c may be formed in an inclined surface shape or a curved surface shape.

（第２実施形態）次に、本発明の第２実施形態を図５に基づいて説明するが、前述の第１実施形態と同一もしくは相当個所には同一の符号を用いてその詳細な説明は省略する。この第２実施形態においては、押圧部２８ｅを第２のケース体２８の周壁部２８ｃではなく第１のケース体２７の支持部２７ａ側に設けるとともに、面取り部２６ｃをフランジ部２６ｂの上端側角部ではなく下端側角部に設けた構成となっている。 (Second Embodiment) Next, a second embodiment of the present invention will be described with reference to FIG. 5. The same reference numerals are used for the same or corresponding parts as in the first embodiment, and the detailed description thereof is as follows. Omitted. In the second embodiment, the pressing portion 28e is provided not on the peripheral wall portion 28c of the second case body 28 but on the support portion 27a side of the first case body 27, and the chamfered portion 26c is provided on the upper end side corner of the flange portion 26b. It is the structure provided in the lower end side corner | angular part instead of the part.

つまり、この場合、支持部２７の上端部（平坦面Ｐ）と支持部２７ａの内壁面との境界部分に曲面形状からなる押圧部２７ｇを設けるとともにフランジ部２６ｂの下端側角部にＣ面加工の施された面取り部２６ｄを設け、フランジ部２６ｂを支持部２７ａと周壁部２８ｃとで挟み込むように第１のケース体２７と第２のケース体２８とを固定したとき、押圧部２７ｇと当接部である面取り部２６ｄとが当接し、押圧部２７ｇからの押圧力Ｇが面取り部２６ｄに作用する構成となっている。   That is, in this case, a pressing portion 27g having a curved surface is provided at a boundary portion between the upper end portion (flat surface P) of the support portion 27 and the inner wall surface of the support portion 27a, and C-face machining is performed at the lower end side corner portion of the flange portion 26b. When the first case body 27 and the second case body 28 are fixed so that the flange portion 26b is sandwiched between the support portion 27a and the peripheral wall portion 28c, the pressing portion 27g The chamfered portion 26d which is a contact portion comes into contact with the chamfered portion 26d, and the pressing force G from the pressing portion 27g acts on the chamfered portion 26d.

かかる第２実施形態においても、面取り部２６ｄに作用する押圧力Ｇは、詳細図示省略するが、フランジ部２６ｂの板面方向に沿って作用する水平分力と、フランジ部２６ｂの板厚方向に作用する垂直分力とに分散され、これら水平分力と垂直分力のうち、水平分力はフランジ部２６ｂの板厚方向に何ら作用しないので、フランジ部２６ｂの変形に影響を与えることになるフランジ部２６ｂの板厚方向に働く力は、水平分力の分だけ従来と比べて小さくなるため、フランジ部２６ｂの変形（つまりレンズ部２６ａの歪み）を抑制することが可能となり、前記第１実施形態と同様の作用効果を得ることができる。   Also in the second embodiment, the pressing force G acting on the chamfered portion 26d is not shown in detail, but the horizontal component acting along the plate surface direction of the flange portion 26b and the plate thickness direction of the flange portion 26b. The horizontal component force is distributed to the acting vertical component force. Of these horizontal component force and vertical component force, the horizontal component force does not act at all in the plate thickness direction of the flange portion 26b, and thus affects the deformation of the flange portion 26b. Since the force acting in the plate thickness direction of the flange portion 26b is smaller than the conventional force by the horizontal component force, deformation of the flange portion 26b (that is, distortion of the lens portion 26a) can be suppressed, and the first The same effect as the embodiment can be obtained.

また、前記第１実施形態と前記第２実施形態とを組み合わせた構成、つまりフランジ部２６ｂに面取り部２６ｃ、２６ｄをそれぞれ設け、フランジ部２６ｂを支持部２７ａと周壁部２８ｃとで挟み込むように第１のケース体２７と第２のケース体２８とを固定したとき、周壁部２８ｃに設けられた押圧部２８ｅからの押圧力を面取り部２６ｃに作用させると同時に支持部２７ａに設けられた押圧部２７ｇからの押圧力を面取り部２６ｄに作用させる構成であっても、フランジ部２６ｂの変形を抑制することができることは言うまでもない。   Further, the first embodiment and the second embodiment are combined, that is, the flange portion 26b is provided with chamfered portions 26c and 26d, and the flange portion 26b is sandwiched between the support portion 27a and the peripheral wall portion 28c. When the first case body 27 and the second case body 28 are fixed, the pressing force provided from the pressing portion 28e provided on the peripheral wall portion 28c acts on the chamfered portion 26c and at the same time the pressing portion provided on the support portion 27a. It goes without saying that even if the pressing force from 27g is applied to the chamfered portion 26d, deformation of the flange portion 26b can be suppressed.

（第３実施形態）次に、本発明の第３実施形態を図６〜図８に基づいて説明するが、前述の第１実施形態と同一もしくは相当個所には同一の符号を用いてその詳細な説明は省略する。この第３実施形態が、前記第１実施形態と異なる点は、液晶表示パネル２４と第１レンズ部材であるレンズ部材２６との間に、第１レンズ部材２６と重なるように第２レンズ部材５１が配置されている点である。 (Third Embodiment) Next, a third embodiment of the present invention will be described with reference to FIGS. 6 to 8. The same reference numerals are used for the same or corresponding parts as in the first embodiment, and the details are used. The detailed explanation is omitted. The third embodiment differs from the first embodiment in that the second lens member 51 is overlapped with the first lens member 26 between the liquid crystal display panel 24 and the lens member 26 that is the first lens member. Is the point where is placed.

なお、本第３実施形態の場合、第１、第２レンズ部材２６、５１及び拡散部材２５が前記第１実施形態にて採用した第１のケース体２７に相当する第１のケース体５２によって保持され、さらに第１のケース体５２の前方側には、前記第１実施形態にて採用した第２のケース体２８に相当する第２のケース体５３が配置されている。   In the case of the third embodiment, the first and second lens members 26 and 51 and the diffusing member 25 are provided by the first case body 52 corresponding to the first case body 27 employed in the first embodiment. Further, a second case body 53 corresponding to the second case body 28 employed in the first embodiment is disposed on the front side of the first case body 52.

第２レンズ部材５１は、ＣＯＰ等の透光性合成樹脂からなり、その外形形状が第１レンズ部材２６の外形形状よりも若干、小さ目に設定され、背面側（第１レンズ部材２６側）が平坦面であるとともに前面側（液晶表示パネル２４側）が凸面である凸レンズからなる第２レンズ部５１ａと、この第２レンズ部５１ａの周囲に延在する薄板状の一対の第２フランジ部５１ｂとを備えている。   The second lens member 51 is made of a light-transmitting synthetic resin such as COP. The outer shape of the second lens member 51 is set slightly smaller than the outer shape of the first lens member 26, and the back side (the first lens member 26 side) is set. A second lens portion 51a made of a convex lens having a flat surface and a front surface (the liquid crystal display panel 24 side) being a convex surface, and a pair of thin plate-like second flange portions 51b extending around the second lens portion 51a. And.

この場合、第２レンズ部５１ａは、第１レンズ部であるレンズ部２６ａからの照明光を集光させる集光部としての機能を有しているので、結果的に光源２２から発せられる照明光（つまり拡散部材２５から出射される前記拡散出射光）は、各レンズ部２６ａ、５１ａを通じて略平行光束化された照明光となり、かかる略平行光束化された照明光が液晶表示パネル２４側に向けて出射するようになっている。   In this case, since the second lens unit 51a has a function as a condensing unit that condenses the illumination light from the lens unit 26a which is the first lens unit, the illumination light emitted from the light source 22 as a result. That is, the diffused outgoing light emitted from the diffusing member 25 becomes illumination light that is converted into a substantially parallel light beam through the lens portions 26a and 51a, and the illumination light that is converted into a substantially parallel light beam is directed toward the liquid crystal display panel 24 side. Are emitted.

一方、各第２フランジ部５１ｂの上端側角部には、第２のケース体５３の後述する第２壁部に設けられる第２押圧部と当接する面取り部（第２当接部）５１ｃが形成され、この第２フランジ部５１ｂに形成された面取り部５１ｃはＣ面取り加工が施された傾斜面形状となっている。なお、図６中、Ｈは、第１のケース体５２の後述する第２支持部を貫通させるために設けられた貫通孔からなる貫通部であり、この貫通部Ｈは、前記第２支持部の配設位置に対応する第１フランジ部２６ｂ箇所の表裏を貫通するようにそれぞれ設けられている。   On the other hand, a chamfered portion (second abutting portion) 51c that abuts on a second pressing portion provided on a second wall portion, which will be described later, of the second case body 53 is formed at the upper end side corner portion of each second flange portion 51b. The chamfered portion 51c formed and formed on the second flange portion 51b has an inclined surface shape subjected to C chamfering. In FIG. 6, H is a through portion formed of a through hole provided for penetrating a later-described second support portion of the first case body 52, and this through portion H is the second support portion. Are provided so as to penetrate through the front and back of the first flange portion 26b corresponding to the arrangement position.

第１のケース体５２は、合成樹脂からなり、第２レンズ部材５１の背後に配置され、前記第１実施形態にて採用した第１フランジ部であるフランジ部２６ｂの周縁を背後から支持する略枠形状の第１支持部５２ａと、第１レンズ部材２６の上方側に位置している第２フランジ部５１ｂを背後から支持するように第１支持部５２ａの内側に位置するボス形状からなる一対の第２支持部５２ｂと、第１支持部５２ａの外側に位置する外壁部５２ｃと、第１支持部５２ａ下端側と第２支持部５２ｂ下端側と外壁部５２ｃとを連結する水平壁部５２ｄとを有している。このうち、第１支持部５２ａ、外壁部５２ｃは、前記第１実施形態にて採用した第１支持部２７ａ、外壁部２７ｃに相当するものである。   The first case body 52 is made of a synthetic resin, is disposed behind the second lens member 51, and substantially supports the peripheral edge of the flange portion 26b, which is the first flange portion employed in the first embodiment, from behind. A pair of boss shapes located inside the first support portion 52a so as to support the frame-shaped first support portion 52a and the second flange portion 51b located above the first lens member 26 from behind. The second support portion 52b, the outer wall portion 52c positioned outside the first support portion 52a, the horizontal wall portion 52d connecting the lower end side of the first support portion 52a, the lower end side of the second support portion 52b, and the outer wall portion 52c. And have. Among these, the first support portion 52a and the outer wall portion 52c correspond to the first support portion 27a and the outer wall portion 27c employed in the first embodiment.

この場合、各第２支持部５２ｂは、前述した各貫通部Ｈをそれぞれ通過して、その先端側が第２フランジ部５１ｂを支えるように構成され、外壁部５２ｃの上端側には前記第１実施形態にて採用した孔部２７ｆに相当する孔部５２ｅが形成されている。また、水平壁部５２ｄの略中央部には、貫通孔部５２ｆが設けられており、この貫通孔部５２ｆを塞ぐように拡散部材２５が水平壁部５２ｄ上に載置されている。   In this case, each of the second support parts 52b is configured to pass through each of the above-described through parts H and the tip side thereof supports the second flange part 51b, and the upper end side of the outer wall part 52c has the first implementation. A hole 52e corresponding to the hole 27f employed in the embodiment is formed. In addition, a through hole 52f is provided at a substantially central portion of the horizontal wall 52d, and the diffusion member 25 is placed on the horizontal wall 52d so as to close the through hole 52f.

第２のケース体５３は、合成樹脂からなり、各レンズ部２６ａ、５１ａに対応するように設けられる開口部５３ａを有する基部５３ｂと、第１のケース体５２の第１支持部５２ａと対をなすように基部５３ｂの背後に垂下形成される略枠形状の第１壁部５３ｃと、この第１壁部５３ｃの内側であって第２レンズ部材５１の側方を取り囲むように基部５３ｂから下方に垂下形成された略枠形状の第２壁部５３ｄと、第１のケース体５２の外壁部５２ｃと対をなすように基部５３ｂ両端部から背後に垂下形成される一対の弾性腕片５３ｅとを有し、第２壁部５３ｄは、第２フランジ部５１ｂの周縁に向かうように突出形成されている。   The second case body 53 is made of a synthetic resin and is paired with a base portion 53b having an opening 53a provided so as to correspond to the lens portions 26a and 51a, and the first support portion 52a of the first case body 52. A substantially frame-shaped first wall portion 53c that hangs behind the base portion 53b and a lower side from the base portion 53b so as to surround the side of the second lens member 51 inside the first wall portion 53c. A substantially frame-shaped second wall portion 53d that hangs down from the bottom, and a pair of elastic arm pieces 53e that hang down from both ends of the base portion 53b so as to form a pair with the outer wall portion 52c of the first case body 52, The second wall portion 53d is formed to protrude toward the periphery of the second flange portion 51b.

なお、この場合、開口部５３ａ、基部５３ｂ、第１壁部５３ｃ並びに弾性腕片５３ｅは、前記第１実施形態にて採用した開口部２８ａ、基部２８ｂ、第１壁部２８ｃ並びに弾性腕片２８ｄにそれぞれ相当するものである。   In this case, the opening 53a, the base 53b, the first wall 53c and the elastic arm piece 53e are the same as the opening 28a, the base 28b, the first wall 28c and the elastic arm piece 28d employed in the first embodiment. Respectively.

また、本第３実施形態の場合、第１壁部５３ｃの下端部には第１レンズ部材２６の第１フランジ部２６ｂに設けられた面取り部（第１当接部）２６ｃと向かい合うように第１押圧部５３ｆが設けられているとともに（図７参照）、第２壁部５３ｄの下端部には第２レンズ部材５１の第２フランジ部５１ｂに設けられた面取り部（第２当接部）５１ｃと向かい合うように第２押圧部５３ｇが設けられ（図８参照）、また各弾性腕片５３ｅの下端部には孔部５２ｅに係合する爪部５３ｈがそれぞれ設けられている。   Further, in the case of the third embodiment, the first wall portion 53c has a lower end portion facing the chamfered portion (first contact portion) 26c provided on the first flange portion 26b of the first lens member 26. 1 press part 53f is provided (refer FIG. 7), and the chamfered part (2nd contact part) provided in the 2nd flange part 51b of the 2nd lens member 51 in the lower end part of the 2nd wall part 53d. A second pressing portion 53g is provided so as to face 51c (see FIG. 8), and a claw portion 53h that engages with the hole 52e is provided at the lower end portion of each elastic arm piece 53e.

第１押圧部５３ｆは、図７に示すように第１壁部５３ｃ内壁面と第１壁部５３ｃ底面との境界部分に設けられた所定の曲率を有する曲面部からなるとともに、第２押圧部５３ｇは、図８に示すように第２壁部５３ｄ内壁面と第２壁部５３ｄ底面との境界部分に設けられた所定の曲率を有する曲面部からなる。   As shown in FIG. 7, the first pressing portion 53 f includes a curved surface portion having a predetermined curvature provided at a boundary portion between the inner wall surface of the first wall portion 53 c and the bottom surface of the first wall portion 53 c, and the second pressing portion. As shown in FIG. 8, 53g consists of a curved surface portion having a predetermined curvature provided at a boundary portion between the inner wall surface of the second wall portion 53d and the bottom surface of the second wall portion 53d.

そして、前記第１実施形態の場合と同様にして、第１フランジ部２６ｂを第１支持部５２ａと第１壁部５３ｃとで挟み込み、且つ第２フランジ部５１ｂを第２支持部５２ｂと第２壁部５３ｄとで挟み込むように第１のケース体５２と第２のケース体５３とを組み付け固定したとき、第１押圧部５３ｆがＣ面取り加工の施された第１当接部である面取り部２６ｃと当接し第１押圧部５３ｆからの押圧力Ｍが面取り部２６ｃに作用すると同時に（図７参照）、第２押圧部５３ｇがＣ面取り加工の施された第２当接部である面取り部５１ｃと当接し第２押圧部５３ｇからの押圧力Ｎが面取り部５１ｃに作用する構成となっている（図８参照）。   As in the case of the first embodiment, the first flange portion 26b is sandwiched between the first support portion 52a and the first wall portion 53c, and the second flange portion 51b is connected to the second support portion 52b and the second support portion 52b. When the first case body 52 and the second case body 53 are assembled and fixed so as to be sandwiched between the wall parts 53d, the first pressing part 53f is a chamfered part which is a first contact part subjected to C chamfering. The chamfered portion is a chamfered portion that is a second abutting portion in which the second pressing portion 53g is subjected to C-chamfering processing while the pressing force M from the first pressing portion 53f acts on the chamfered portion 26c (see FIG. 7). The pressing force N from the second pressing portion 53g is in contact with 51c and acts on the chamfered portion 51c (see FIG. 8).

すなわち、第１壁部５３ｃと第１フランジ部２６ｂとに着目すると、第１壁部５３ｃに設けられた曲面部からなる第１押圧部５３ｆが、第１押圧部５３ｆと向かい合うように第１フランジ部２６ｂに設けられた傾斜面からなる面取り部（第１当接部）２６ｃと当接することに伴い、図６中、Ｂ部を拡大して示す図７に示すごとく面取り部２６ｃには面取り部２６ｃに対し垂直方向（つまり図７中、右斜め下方向）に第１押圧部５３ｆからの押圧力Ｍが作用する。   That is, paying attention to the first wall portion 53c and the first flange portion 26b, the first flange 53f, which is a curved surface portion provided on the first wall portion 53c, faces the first pressing portion 53f so that the first flange portion 53f faces the first flange portion 53f. The chamfered portion 26c has a chamfered portion as shown in FIG. 7 which is an enlarged view of the portion B in FIG. 6 as it comes into contact with the chamfered portion (first abutting portion) 26c having an inclined surface provided in the portion 26b. A pressing force M from the first pressing portion 53f acts in a direction perpendicular to 26c (that is, diagonally downward to the right in FIG. 7).

このとき、傾斜面からなる面取り部２６ｃに作用する押圧力Ｍは、前述した第１実施形態（図４の押圧力Ｆ）の場合と同様なので詳細図示は省略するが、第１フランジ部２６ｂの板面方向に沿って作用する水平分力と、第１フランジ部２６ｂの板厚方向に作用する垂直分力とに分散されるため、第１フランジ部２６ｂの変形（つまり第１レンズ部２６ａの歪み）を抑制することが可能となる。   At this time, the pressing force M acting on the chamfered portion 26c made of an inclined surface is the same as that in the case of the first embodiment (the pressing force F in FIG. 4) described above, and detailed illustration is omitted, but the first flange portion 26b Since the horizontal component force acting along the plate surface direction and the vertical component force acting in the plate thickness direction of the first flange portion 26b are dispersed, the deformation of the first flange portion 26b (that is, the first lens portion 26a). (Distortion) can be suppressed.

さらに、第２壁部５３ｄと第２フランジ部５１ｂとに着目すると、第２壁部５３ｄに設けられた曲面部からなる第２押圧部５３ｇが、第２押圧部５３ｇと向かい合うように第２フランジ部５１ｂに設けられた傾斜面からなる面取り部（第２当接部）５１ｃと当接することに伴い、図８に示すごとく面取り部５１ｃには面取り部５１ｃに対し垂直方向（つまり図８中、右斜め下方向）に第２押圧部５３ｇからの押圧力Ｎが作用する。   Furthermore, paying attention to the second wall portion 53d and the second flange portion 51b, the second flange portion 53g, which is a curved surface portion provided on the second wall portion 53d, faces the second pressing portion 53g. As shown in FIG. 8, the chamfered portion 51c has a direction perpendicular to the chamfered portion 51c (that is, in FIG. 8, in connection with the chamfered portion (second abutting portion) 51c formed of an inclined surface provided in the portion 51b. The pressing force N from the second pressing portion 53g acts on the lower right side).

このとき、傾斜面からなる面取り部５１ｃに作用する押圧力Ｎは、第２フランジ部５１ｂの板面方向に沿って作用する水平分力Ｎ１と、第２フランジ部５１ｂの板厚方向に作用する垂直分力Ｎ２とに分散される。ここで、水平分力Ｎ１と垂直分力Ｎ２のうち、水平分力Ｎ１は第２フランジ部５１ｂの板厚方向に何ら作用しないので、第２フランジ部５１ｂの変形に影響を与えることになる第２フランジ部５１ｂの板厚方向に働く力は、水平分力Ｎ１の分だけ軽減され、これにより第２レンズ部材５１をＣＯＰによって形成した場合であっても、第２フランジ部５１ｂの変形（つまり第２レンズ部５１ａの歪み）を抑制することができる。   At this time, the pressing force N acting on the chamfered portion 51c formed of an inclined surface acts on the horizontal component force N1 acting along the plate surface direction of the second flange portion 51b and the plate thickness direction of the second flange portion 51b. Distributed to the vertical component N2. Here, of the horizontal component force N1 and the vertical component force N2, the horizontal component force N1 does not act at all in the plate thickness direction of the second flange portion 51b, and therefore affects the deformation of the second flange portion 51b. The force acting in the plate thickness direction of the two flange portions 51b is reduced by the horizontal component force N1, so that even when the second lens member 51 is formed by COP, the second flange portion 51b is deformed (that is, (Distortion of the second lens portion 51a) can be suppressed.

このように本第３実施形態によれば、第１のケース体５２と第２のケース体５３とを組み付け固定した際に、第１押圧部５３ｆからの押圧力Ｍを第１当接部である面取り部２６ｃに作用させ、且つ第２押圧部５３ｇからの押圧力Ｎを第２当接部である面取り部５１ｃに作用させる構成としたことで、各レンズ部材２６、５１をＣＯＰによって形成した場合であっても、各フランジ部２６ｂ、５１ｂの変形（つまり各レンズ部２６ａ、５１ａの歪み）を抑制することが可能となり、前記第１実施形態と同様の作用効果を得ることができる。   As described above, according to the third embodiment, when the first case body 52 and the second case body 53 are assembled and fixed, the pressing force M from the first pressing portion 53f is applied to the first contact portion. The lens members 26 and 51 are formed by COP by acting on a chamfered portion 26c and applying a pressing force N from the second pressing portion 53g to the chamfered portion 51c that is the second contact portion. Even in this case, it is possible to suppress deformation of the flange portions 26b and 51b (that is, distortion of the lens portions 26a and 51a), and the same effects as those of the first embodiment can be obtained.

なお前記各実施形態では、液晶表示パネル２４から発せられる表示光Ｌが、フロントガラス１３に投射される例について説明したが、例えばフロントガラス１３に表示光Ｌを良好に運転者１４方向に反射させるコンバイナフィルムを設けてもよいし、あるいはフロントガラス１３とは別の専用の反射体に表示光Ｌを投射する構成としてもよい。   In each of the above embodiments, the example in which the display light L emitted from the liquid crystal display panel 24 is projected onto the windshield 13 has been described. For example, the display light L is favorably reflected in the direction of the driver 14 on the windshield 13. A combiner film may be provided, or the display light L may be projected onto a dedicated reflector different from the windshield 13.

２０ 表示器（照明装置）
２１ 回路基板（基板）
２２ 光源
２３ 光源ユニット
２４ 液晶表示パネル（被照明部材）
２５ 拡散部材
２６ レンズ部材（第１レンズ部材）
２６ａ レンズ部（第１レンズ部）
２６ｂ フランジ部（第１フランジ部）
２６ｃ、２６ｄ 当接部（第１当接部）
２７、５２ 第１のケース体
２７ａ、５２ａ 支持部（第１支持部）
２７ｂ 仕切部
２７ｃ、５２ｃ 外壁部
２７ｄ 連結部
２７ｅ、５２ｆ 貫通孔部
２７ｇ、２８ｅ、５３ｆ 押圧部（第１押圧部）
２８、５３ 第２のケース体
２８ａ、５３ａ 開口部
２８ｂ、５３ｂ 基部
２８ｃ、５３ｃ 壁部（第１壁部）
２８ｄ、５３ｅ 弾性腕片
２８ｆ、５３ｈ 爪部
５１ 第２レンズ部材
５１ａ 第２レンズ
５１ｂ 第２フランジ部
５１ｃ 第２当接部
５２ｂ 第２支持部
５２ｄ 水平壁部
５３ｄ 第２壁部
５３ｇ 第２押圧部
Ｆ、Ｇ、Ｍ、Ｎ 押圧力
Ｆ１、Ｇ１、Ｎ１ 水平分力
Ｆ２、Ｇ２、Ｎ２ 垂直分力
Ｈ 貫通部
Ｓ１ 上側空間部
Ｓ２ 下側空間部 20 Indicator (lighting device)
21 Circuit board (board)
22 Light source 23 Light source unit 24 Liquid crystal display panel (illuminated member)
25 Diffusion member 26 Lens member (first lens member)
26a Lens part (first lens part)
26b Flange part (first flange part)
26c, 26d contact part (first contact part)
27, 52 First case body 27a, 52a Support portion (first support portion)
27b Partition part 27c, 52c Outer wall part 27d Connection part 27e, 52f Through-hole part 27g, 28e, 53f Press part (1st press part)
28, 53 Second case body 28a, 53a Opening portion 28b, 53b Base portion 28c, 53c Wall portion (first wall portion)
28d, 53e Elastic arm pieces 28f, 53h Claw part 51 Second lens member 51a Second lens 51b Second flange part 51c Second contact part 52b Second support part 52d Horizontal wall part 53d Second wall part 53g Second pressing part F, G, M, N Pressing force F1, G1, N1 Horizontal component force F2, G2, N2 Vertical component force H Penetration portion S1 Upper space portion S2 Lower space portion

Claims (4)

基板に光源が配設された光源ユニットと、
前記光源ユニットの前方側に配置され、前記光源からの照明光により照明される被照明部材と、
前記光源ユニットと前記被照明部材との間に配置され、前記光源からの照明光を集光させる第１レンズ部と前記第１レンズ部の周囲に延在する第１フランジ部とを有する第１レンズ部材と、
前記第１フランジ部を支持する第１支持部を有する第１のケース体と、
前記第１レンズ部に対応するように設けられる開口部を有する基部と前記第１レンズ部を取り囲むように前記基部に形成された第１壁部とを有する第２のケース体とを備えてなる照明装置において、
前記第１フランジ部には前記第１壁部と前記第１支持部のうち少なくとも一方に設けられた第１押圧部と当接する第１当接部が設けられ、
前記第１フランジ部を前記第１支持部と前記第１壁部とで挟み込むように前記第１のケース体と前記第２のケース体とを固定したとき、前記第１押圧部からの押圧力を前記第１当接部に作用させる構成とし、
前記第１のケース体は、前記光源ユニットと前記第１レンズ部材との間に位置するように前記第１支持部に一体形成された水平壁部を有し、
前記水平壁部に設けられた貫通孔部を塞ぐように拡散部材が載置されていることを特徴とする照明装置。 A light source unit having a light source disposed on a substrate;
An illuminated member disposed on the front side of the light source unit and illuminated by illumination light from the light source;
A first lens unit disposed between the light source unit and the member to be illuminated and having a first lens unit for condensing illumination light from the light source and a first flange unit extending around the first lens unit. A lens member;
A first case body having a first support portion for supporting the first flange portion;
And a second case body having a base portion having an opening provided to correspond to the first lens portion and a first wall portion formed on the base portion so as to surround the first lens portion. In the lighting device,
The first flange portion is provided with a first contact portion that contacts a first pressing portion provided on at least one of the first wall portion and the first support portion,
When the first case body and the second case body are fixed so that the first flange portion is sandwiched between the first support portion and the first wall portion, the pressing force from the first pressing portion To act on the first contact portion ,
The first case body has a horizontal wall portion integrally formed with the first support portion so as to be positioned between the light source unit and the first lens member,
A diffusing member is placed so as to close a through hole provided in the horizontal wall . 前記第１当接部は、前記第１フランジ部に形成された面取り部であることを特徴とする請求項１記載の照明装置。 The lighting device according to claim 1, wherein the first contact portion is a chamfered portion formed in the first flange portion. 前記第１レンズ部材と前記被照明部材との間に配置される第２レンズ部材は、前記第１レンズ部からの照明光を集光させる第２レンズ部と、前記第２レンズ部の周囲に延在する第２フランジ部とを備え、
前記第１のケース体は前記第２フランジ部を支持する第２支持部を有しているいるとともに前記第２のケース体は前記第２レンズ部を取り囲むように前記基部に形成された第２壁部を有し、
前記第２フランジ部には前記第２壁部に設けられた第２押圧部と当接する第２当接部が設けられ、
前記第２フランジ部を前記第２支持部と前記第２壁部とで挟み込むように前記第１のケース体と前記第２のケース体とを固定したとき、前記第２押圧部からの押圧力を前記第２当接部に作用させる構成としたことを特徴とする請求項１記載の照明装置。 A second lens member disposed between the first lens member and the illuminated member is provided around the second lens unit and a second lens unit that collects illumination light from the first lens unit. A second flange portion extending,
The first case body has a second support portion for supporting the second flange portion, and the second case body is formed on the base portion so as to surround the second lens portion. Has a wall,
The second flange portion is provided with a second abutting portion that abuts on a second pressing portion provided on the second wall portion,
When the first case body and the second case body are fixed so that the second flange portion is sandwiched between the second support portion and the second wall portion, the pressing force from the second pressing portion The lighting device according to claim 1, wherein the second contact portion is configured to act on the second contact portion. 前記第２当接部は、前記第２フランジ部に形成された面取り部であることを特徴とする請求項３記載の照明装置。
The lighting device according to claim 3, wherein the second contact portion is a chamfered portion formed in the second flange portion.
JP2010099835A 2010-02-22 2010-04-23 Lighting device Expired - Fee Related JP5526974B2 (en)

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