JP6328525B2 - Automotive analog clock - Google Patents

Automotive analog clock Download PDF

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JP6328525B2
JP6328525B2 JP2014175301A JP2014175301A JP6328525B2 JP 6328525 B2 JP6328525 B2 JP 6328525B2 JP 2014175301 A JP2014175301 A JP 2014175301A JP 2014175301 A JP2014175301 A JP 2014175301A JP 6328525 B2 JP6328525 B2 JP 6328525B2
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light
guide plate
light guide
dial
pointer
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JP2016050810A (en
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岩永　英治
英治 岩永
政幸 南雲
政幸 南雲
裕文 野中
裕文 野中
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Rhythm Watch Co Ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K2360/00—Indexing scheme associated with groups B60K35/00 or B60K37/00 relating to details of instruments or dashboards
    • B60K2360/60—Structural details of dashboards or instruments
    • B60K2360/68—Features of instruments
    • B60K2360/698—Pointers of combined instruments
    • B60K2360/6992—Light conducting pointers

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  • Electric Clocks (AREA)
  • Indicating Measured Values (AREA)
  • Details Of Measuring Devices (AREA)

Description

本発明は、時計の指針が間接照明される形式の車載用アナログ時計に関する。   The present invention relates to an in-vehicle analog timepiece in which a timepiece pointer is indirectly illuminated.

本願出願人は、発光装置を用いて、時計の指針や文字板を照明する車載用アナログ時計を提案した（特許文献１）。近時においては、この発光装置にＬＥＤを用いるものが知られている。   The applicant of the present application has proposed an in-vehicle analog timepiece that illuminates the timepiece hands and dial using a light emitting device (Patent Document 1). Recently, a device using an LED for the light emitting device is known.

実公平７−４７７５９号公報No. 7-47759

上記のＬＥＤを用いた車載用アナログ時計は、一般にＬＥＤを文字板の外周端（見返し）に配置して、光を文字板の中央部分に投光するものである。   A vehicle-mounted analog timepiece using the above-described LED generally has an LED disposed at the outer peripheral end (lookback) of the dial and projects light onto the central portion of the dial.

このような従来の車載用アナログ時計は、外周側から指針や文字板を投光するので、照明される箇所の輝度が場所により異なることがあった。   In such a conventional on-vehicle analog timepiece, a pointer or dial is projected from the outer peripheral side, so that the brightness of the illuminated part may vary depending on the place.

本発明は、上記事情に鑑みてなされたもので、ＬＥＤを用いるとともに、これに導光板を介在させて、指針などを間接照明することにより、照明される箇所の輝度を可及的に平均化することができる車載用アナログ時計を提案するものである。   The present invention has been made in view of the above circumstances, and by using an LED and interposing a light guide plate to indirectly illuminate a pointer or the like, the luminance of the illuminated portion is averaged as much as possible. The present invention proposes an in-vehicle analog watch that can be used.

本願第１請求項に記載した発明は、実施例で用いた符号を付して記すと、車室内に設置される車載用アナログ時計１において、
ガラス板３を設けた前ケース２と、裏ケース４との間の空間に、裏ケース側から順に、ムーブメント５、回路基板６、導光板８、円形状の文字板９、及び時分針などの指針１０，１０を備え、
回路基板６には、導光板８に向けて光を照射するＬＥＤ７，７を複数配置し、
導光板８は、ＬＥＤ７，７からの光を当該導光板に導入する導入部８ａと、円板状本体部８ｃと、文字板９の周縁に位置して正面側へ突出するリング状突出部８ｂとを備え、
導光板８の円板状本体部８ｃと指針１０，１０とを平行に設け、
導光板８に対向する箇所の回路基板６に反射板１８を設け、
文字板９は、光が通過する透過タイプのものであり、
指針１０は、反射部材で形成されるとともに、指針の側部には光を正面側へ反射させる反射部１０ａを備え、
ＬＥＤ７，７が発光すると、その光が導光板８の前記導入部８ａから導入されてリング状突出部８ｂから導出され、これにより指針１０の反射部１０ａで光が正面側へ反射されて、当該指針が発光して見えるように構成され、且つ、前記文字板９は、前記導光板８に装着されて、この導光板８から直接、透過照明がなされることを特徴とする車載用アナログ時計である。
When the invention described in the first claim of the present application is described with the reference numerals used in the embodiments, in the in-vehicle analog timepiece 1 installed in the passenger compartment,
In the space between the front case 2 provided with the glass plate 3 and the back case 4, the movement 5, the circuit board 6, the light guide plate 8, the circular dial 9, and the hour / minute hands are sequentially arranged from the back case side. Provided with pointers 10 and 10,
A plurality of LEDs 7 and 7 that irradiate light toward the light guide plate 8 are arranged on the circuit board 6.
The light guide plate 8 includes an introduction portion 8a that introduces light from the LEDs 7 and 7 into the light guide plate, a disc-shaped main body portion 8c, and a ring-shaped protrusion portion 8b that is located on the periphery of the dial plate 9 and protrudes to the front side. And
The disc-shaped main body portion 8c of the light guide plate 8 and the pointers 10 and 10 are provided in parallel,
A reflector 18 is provided on the circuit board 6 at a location facing the light guide plate 8;
The dial 9 is of a transmission type through which light passes,
The pointer 10 is formed of a reflecting member, and includes a reflecting portion 10a that reflects light to the front side on a side portion of the pointer,
When the LEDs 7 and 7 emit light, the light is introduced from the introduction portion 8a of the light guide plate 8 and led out from the ring-shaped protrusion 8b, whereby the light is reflected to the front side by the reflection portion 10a of the pointer 10, An in-vehicle analog timepiece characterized in that a pointer is seen to emit light , and the dial plate 9 is mounted on the light guide plate 8 and is directly illuminated by the light guide plate 8. is there.

本願第１請求項に記載した発明によれば、回路基板６に設けられたＬＥＤ７，７から導光板８に向けて光が照射され、この光は導光板８の導入部８ａに導入されて、リング状突出部８ｂから導出され、この光が指針１０の反射部１０ａで正面側へ反射されるとともに、このリング状突出部８ｂから導出された光が文字板９も照明する。このようにして、指針及び文字板が間接照明される。そして、この間接照明は、導光板８のリング状突出部８ｂから導出された光により行われるので、文字板９の周縁から均一になされて、照明される箇所の輝度を可及的に平均化することができ、視認性の向上を図ることができる。   According to the invention described in the first claim of the present application, light is emitted from the LEDs 7 and 7 provided on the circuit board 6 toward the light guide plate 8, and this light is introduced into the introduction portion 8a of the light guide plate 8, The light is led out from the ring-shaped projecting portion 8b and reflected by the reflecting portion 10a of the pointer 10 to the front side, and the light led out from the ring-shaped projecting portion 8b also illuminates the dial 9. In this way, the pointer and dial are indirectly illuminated. And since this indirect illumination is performed with the light derived | led-out from the ring-shaped protrusion part 8b of the light-guide plate 8, it is made uniformly from the periphery of the dial plate 9, and averages the brightness | luminance of the location illuminated as much as possible. It is possible to improve visibility.

また、本願第１請求項に記載した発明によれば、導光板８に対向する箇所の回路基板６に反射板１８を設けたので、導光板８から漏洩する光は反射板１８で反射して、再び導光板８に導入されることとなり、導光板８における導光量の損失を可及的に低減することが可能となる。

 Further, according to the invention described herein the first claim, is provided with the reflecting plate 18 to the circuit board 6 of a portion facing the light guide plate 8, the light leaking from the light guide plate 8 is reflected by the reflecting plate 18 Then, the light is introduced into the light guide plate 8 again, and the loss of the light guide amount in the light guide plate 8 can be reduced as much as possible.

このように、本願発明によれば、ＬＥＤに導光板を介在させて、指針などを間接照明することにより、照明される箇所の輝度を可及的に平均化することができて、視認性の向上を図ることができる。また、文字板のみを、無透過タイプ又は透過タイプのものを選択することにより、基本的な光の導光構造を変えずに、間接照明の方式と、間接照明に透過照明を加えた方式の２方式を、適宜実現できるといった利便性も有するものである。   As described above, according to the present invention, the luminance of the illuminated portion can be averaged as much as possible by indirectly illuminating the pointer with the light guide plate interposed in the LED. Improvements can be made. In addition, by selecting the non-transmission type or the transmission type for the dial plate alone, the indirect illumination method and the indirect illumination method with transmission illumination can be used without changing the basic light guide structure. The two methods can be realized as appropriate.

本発明の実施例に係り、車載用アナログ時計の正面図である。1 is a front view of an in-vehicle analog timepiece according to an embodiment of the present invention. 本発明の実施例に係り、図１のＸ-Ｘ線断面図である。FIG. 2 is a sectional view taken along line XX in FIG. 1 according to the embodiment of the present invention. 本発明の実施例に係り、車載用アナログ時計の分解斜視図である。1 is an exploded perspective view of an in-vehicle analog timepiece according to an embodiment of the present invention. 本発明の実施例に係り、回路基板を示す図である。It is a figure which shows the circuit board concerning the Example of this invention. 本発明の実施例に係り、車載用アナログ時計の要部断面図である。It is a principal part sectional view of an in-vehicle analog timepiece concerning an example of the present invention. 本発明の実施例に係り、車載用アナログ時計の照明時における正面図である。It is a front view at the time of illumination of the vehicle-mounted analog timepiece according to the embodiment of the present invention. 本発明の実施例に係り、車載用アナログ時計の他の例を示す要部断面図である。FIG. 10 is a cross-sectional view of a main part showing another example of the in-vehicle analog timepiece according to the embodiment of the present invention.

以下に、本発明の実施例を図面に基づいて説明する。本例の車載用アナログ時計１は、図１〜図３に示すように、ガラス板３を設けた前ケース２と、裏ケース４との間の空間に、裏ケース側から順に、ムーブメント５、回路基板６、導光板８、円形状の文字板９、及び時分針などの指針１０，１０を備える。   Embodiments of the present invention will be described below with reference to the drawings. As shown in FIGS. 1 to 3, the in-vehicle analog timepiece 1 of this example includes a movement 5, in order from the back case side, in a space between the front case 2 provided with the glass plate 3 and the back case 4. A circuit board 6, a light guide plate 8, a circular dial plate 9, and hands 10 and 10 such as an hour / minute hand are provided.

回路基板６には、導光板８に向けて光を照射するＬＥＤ７，７を複数配置している。この例では、図４に示すように、回路基板の中央に４個のＬＥＤ７，７を均等に配置している。   A plurality of LEDs 7, 7 that irradiate light toward the light guide plate 8 are arranged on the circuit board 6. In this example, as shown in FIG. 4, four LEDs 7 and 7 are equally arranged in the center of the circuit board.

導光板８は、ＬＥＤ７，７からの光を当該導光板に導入する導入部８ａと、文字板９の周縁に位置して正面側へ突出するリング状突出部８ｂを備える。この例では、文字板９は、光を通過しない無透過タイプのものを用いている。尚、図中、８ｄは導光板８の脚部である。この脚部８ｄは、回路基板６の切り欠き部を挿通して位置決めされた後、裏ケース４の背面から挿入したタッピンねじ１７（図３参照）により、固定される。   The light guide plate 8 includes an introduction portion 8a that introduces light from the LEDs 7 and 7 into the light guide plate, and a ring-shaped protrusion portion 8b that is located at the periphery of the dial plate 9 and protrudes to the front side. In this example, the dial 9 is of a non-transmissive type that does not transmit light. In the figure, reference numeral 8 d denotes a leg portion of the light guide plate 8. The leg portion 8d is positioned by being inserted through the notch portion of the circuit board 6, and then fixed by a tapping screw 17 (see FIG. 3) inserted from the back surface of the back case 4.

前記導光板８は、導入部８ａから導入された光が、円板状本体部８ｃの表裏面に設けられた乱反射手段により乱反射してリング状突出部８ｂから放射されるものである。   In the light guide plate 8, the light introduced from the introduction portion 8a is diffusely reflected by the irregular reflection means provided on the front and back surfaces of the disc-shaped main body portion 8c and radiated from the ring-shaped protrusion 8b.

尚、乱反射手段としては、例えば、射出成形にて導光板と一体に成形された球面、円錐、角錐、角柱、又は円筒型の微細凸状の反射ドットを分布してなるものを用いる。これらの分布に関しては、乱反射する光が比較的強い部位では反射ドットの占める面積を疎に設定し、また、乱反射する光が比較的弱い部位では反射ドットの占める面積を密に設定する。更に、シボ処理による乱反射構造、インクや塗料等の印刷や、これらを複合した構造を用いることができる。   As the irregular reflection means, for example, a spherical, conical, pyramid, prismatic, or cylindrical fine convex reflection dot that is integrally formed with the light guide plate by injection molding is used. With respect to these distributions, the area occupied by the reflective dots is set sparsely in the part where the irregularly reflected light is relatively strong, and the area occupied by the reflective dots is set densely in the part where the irregularly reflected light is relatively weak. Furthermore, an irregular reflection structure by a graining process, printing of ink or paint, or a structure in which these are combined can be used.

また、指針１０は、反射部材で形成されるとともに、指針の側部には光を正面側へ反射させる反射部１０ａを備える。このように反射部１０ａを備えていると、この反射部１０ａによって光が正面側へ反射して、指針が発光して見えるので、照明度を向上させることができる。   The pointer 10 is formed of a reflective member, and includes a reflecting portion 10a that reflects light toward the front side on the side portion of the pointer. When the reflection portion 10a is provided in this way, light is reflected to the front side by the reflection portion 10a and the pointer appears to emit light, so that the illumination intensity can be improved.

上記のように構成される本例の車載用アナログ時計１は、ＬＥＤ７，７が発光すると、その光が導光板８の導入部８ａから導入されてリング状突出部８ｂから導出され、これにより指針１０の反射部１０ａで光が反射して、当該指針が発光して見える。尚、本例では、回路基板の中央に４個のＬＥＤ７，７を均等に配置したが、車載用アナログ時計１が比較的小型である場合は、これより少なく、例えば２個のＬＥＤ７，７であってもよい。   In the in-vehicle analog timepiece 1 of the present example configured as described above, when the LEDs 7 and 7 emit light, the light is introduced from the introduction portion 8a of the light guide plate 8 and led out from the ring-shaped protrusion 8b, thereby the pointer. The light is reflected by the 10 reflecting portions 10a, and the pointer appears to emit light. In this example, the four LEDs 7 and 7 are evenly arranged in the center of the circuit board. However, when the in-vehicle analog timepiece 1 is relatively small, the number is smaller than this, for example, two LEDs 7 and 7 are used. There may be.

また、本例の車載用アナログ時計１では、文字板９は、光を通過しない無透過タイプのものを用いている。そのため、指針１０及び文字板９は双方とも、導光板８のリング状突出部８ｂから導出された光による間接照明がなされる。   In the in-vehicle analog timepiece 1 of this example, the dial 9 is of a non-transmissive type that does not transmit light. Therefore, both the pointer 10 and the dial plate 9 are indirectly illuminated with light derived from the ring-shaped protrusion 8b of the light guide plate 8.

尚、この場合、文字板９は、導光板８との間に、例えば両面テープを介在させることにより、固着の簡易化がなされ得る。従って、後記する文字板押え１１は用いなくてもよい。   In this case, the dial 9 can be easily fixed by interposing a double-sided tape between the dial 9 and the light guide plate 8, for example. Therefore, the dial holder 11 described later need not be used.

一方、図７に示すものは、文字板９に、光を通過する透過タイプのものを用いている。この場合、指針１０は、導光板８のリング状突出部８ｂから導出された光による間接照明がなされる一方で、文字板９は、直接、導光板８からの透過照明がなされ得る。このように、文字板９が直接、導光板８からの透過照明がなされ得る場合は、例えば、文字板の指標に相応する箇所を適宜の色彩で透過照明可能とし、それ以外の箇所は黒色印刷で覆うなどすれば、指標をより一層際立たせることが可能となる。   On the other hand, the thing shown in FIG. 7 uses the transmission type thing which passes light for the dial plate 9. In this case, the pointer 10 can be indirectly illuminated by the light derived from the ring-shaped protrusion 8 b of the light guide plate 8, while the dial 9 can be directly illuminated from the light guide plate 8. In this way, when the dial plate 9 can be directly illuminated from the light guide plate 8, for example, a portion corresponding to the index of the dial plate can be transmitted and illuminated with an appropriate color, and the other portions are printed in black. By covering with, it becomes possible to make the indicator stand out more.

更に、図７に示す例の場合は、導光板８に対向する箇所の回路基板６に反射板１８を設けている。このように反射板１８を設けると、導光板８から漏洩する光は反射板１８で反射して、再び導光板８に導入されることとなり、導光板８における導光量の損失を可及的に低減することが可能となる。   Further, in the case of the example shown in FIG. 7, a reflecting plate 18 is provided on the circuit board 6 at a location facing the light guide plate 8. When the reflection plate 18 is provided in this way, the light leaking from the light guide plate 8 is reflected by the reflection plate 18 and introduced again into the light guide plate 8, and the loss of the light guide amount in the light guide plate 8 is minimized. It becomes possible to reduce.

従って、文字板９を、無透過タイプ又は透過タイプのものを選択することにより、基本的な光の導光構造を変えずに、間接照明の方式と、間接照明に透過照明を加えた方式の２方式を、適宜実現することができる。   Therefore, by selecting a non-transmission type or a transmission type for the dial plate 9 without changing the basic light guiding structure, an indirect illumination method and a method in which transmitted illumination is added to indirect illumination. Two systems can be realized as appropriate.

図３及び、図７に示す例において、図中１１は文字板押えであり、文字板９を導光板８に固定するためのものである。この文字板押え１１には、下部に４個のボス１１ａを設けている。ボス１１ａは、導光板８の円板状本体部８ｃに、熱或いは超音波により融着される。このように、ボス１１ａを用いて融着するのは、例えばボス１１ａではなく爪で係止すると、固定強度の点で若干弱かったり、爪の箇所で光が乱反射する不具合があるので、これを回避するためである。   In the example shown in FIG. 3 and FIG. 7, reference numeral 11 in the figure is a dial presser for fixing the dial 9 to the light guide plate 8. The dial holder 11 is provided with four bosses 11a at the bottom. The boss 11a is fused to the disc-shaped main body portion 8c of the light guide plate 8 by heat or ultrasonic waves. In this way, the boss 11a is fused with, for example, the boss 11a instead of the claw, so that there is a problem that the fixing strength is slightly weak or the light is irregularly reflected at the claw. This is to avoid it.

更に、図３において、図中１２は中心キャップで、導光板８の円板状本体部８ｃを挿通される指針のシャフトを外嵌して保持している。これは、シャフトが長いので、これに固着される指針１０の倒れを押えるとともに、光源（ＬＥＤ７，７）が近いので、このキャップで光漏れの封止を行うものである。また、図中１３は見返し、１５はガラス板の押え用テープ、１６はゴミ防止用クッションである。   Further, in FIG. 3, reference numeral 12 in the figure denotes a center cap, which holds and holds a pointer shaft that is inserted through the disc-shaped main body portion 8 c of the light guide plate 8. In this case, since the shaft is long, the tilt of the pointer 10 fixed to the shaft 10 is suppressed, and the light sources (LEDs 7 and 7) are close to each other. In the figure, 13 is a turn, 15 is a glass plate pressing tape, and 16 is a dust prevention cushion.

本発明の車載用アナログ時計は、指針などを間接照明することにより、照明される箇所の輝度を可及的に平均化することができ、あらゆる車種のものに好適に利用することができる。   The in-vehicle analog timepiece according to the present invention can average the luminance of the illuminated portion as much as possible by indirectly illuminating the hands and the like, and can be suitably used for all types of vehicles.

１ 車載用アナログ時計
２ 前ケース
３ ガラス板
４ 裏ケース
５ ムーブメント
６ 回路基板
７ ＬＥＤ
８ 導光板
８ａ 導入部
８ｂ リング状突出部
８ｃ 円板状本体部
８ｄ 脚部
９ 文字板
１０ 指針
１０ａ 導入部
１１ 文字板押え
１１ａ ボス
１２ 中心キャップ
１３ 見返し
１５ ガラス固定用テープ
１６ ゴミ防止用クッション
１７ タッピンねじ
１８ 反射板
DESCRIPTION OF SYMBOLS 1 Car-mounted analog clock 2 Front case 3 Glass plate 4 Back case 5 Movement 6 Circuit board 7 LED
8 Light guide plate 8a Introducing portion 8b Ring-shaped projecting portion 8c Disc-shaped main body portion 8d Leg 9 Dial 10 Pointer 10a Introducing portion 11 Dial retainer 11a Boss 12 Center cap 13 Turning 15 Glass fixing tape 16 Dust prevention cushion 17 Tapping screw 18 Reflector

Claims (1)

車室内に設置される車載用アナログ時計において、
ガラス板を設けた前ケースと、裏ケースとの間の空間に、裏ケース側から順に、ムーブメント、回路基板、導光板、円形状の文字板、及び時分針などの指針を備え、
前記回路基板には、前記導光板に向けて光を照射するＬＥＤを複数配置し、
前記導光板は、前記ＬＥＤからの光を当該導光板に導入する導入部と、円板状本体部と、前記文字板の周縁に位置して正面側へ突出するリング状突出部とを備え、
前記導光板の前記円板状本体部と前記指針とを平行に設け、
前記導光板に対向する箇所の前記回路基板に反射板を設け、
前記文字板は、光が通過する透過タイプのものであり、
前記指針は、反射部材で形成されるとともに、指針の側部には光を正面側へ反射させる反射部を備え、
前記ＬＥＤが発光すると、その光が前記導光板の前記導入部から導入されて前記リング状突出部から導出され、これにより指針の前記反射部によって光が正面側へ反射して、当該指針が発光して見えるように構成され、且つ、前記文字板は、前記導光板に装着されて、この導光板から直接、透過照明がなされることを特徴とする車載用アナログ時計。
In the in-vehicle analog watch installed in the passenger compartment,
In the space between the front case with the glass plate and the back case, in order from the back case side, equipped with movement, circuit board, light guide plate, circular dial, and hands such as hour and minute hands,
A plurality of LEDs that irradiate light toward the light guide plate are disposed on the circuit board,
The light guide plate includes an introduction portion that introduces light from the LED into the light guide plate, a disk-shaped main body portion, and a ring-shaped protrusion portion that is located on the periphery of the dial plate and protrudes to the front side,
The disk-shaped main body of the light guide plate and the pointer are provided in parallel,
A reflector is provided on the circuit board at a location facing the light guide plate,
The dial is of a transmissive type through which light passes,
The pointer is formed of a reflective member, and a side portion of the pointer includes a reflection portion that reflects light to the front side,
When the LED emits light, the light is introduced from the introduction portion of the light guide plate and led out from the ring-shaped protruding portion, whereby the light is reflected to the front side by the reflection portion of the pointer, and the pointer emits light. The dial is mounted on the light guide plate, and transmitted illumination is directly performed from the light guide plate .
JP2014175301A 2014-08-29 2014-08-29 Automotive analog clock Active JP6328525B2 (en)

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Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52110349U (en) * 1976-02-19 1977-08-22
JPS6333423U (en) * 1986-08-20 1988-03-03
JPH0415013U (en) * 1990-05-25 1992-02-06
EP1870786A1 (en) * 2006-06-23 2007-12-26 ETA SA Manufacture Horlogère Suisse Clock piece with an illumination system comprising a light emitting diode
JP5169953B2 (en) * 2009-04-03 2013-03-27 株式会社デンソー Pointer instrument

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