JP2017150863A

JP2017150863A - Pointer clock with hand position detection function

Info

Publication number: JP2017150863A
Application number: JP2016031582A
Authority: JP
Inventors: 矢野　結資; Yuisuke Yano; 結資矢野; 翔一郎森田; Shoichiro Morita
Original assignee: Citizen Watch Co Ltd
Current assignee: Citizen Watch Co Ltd
Priority date: 2016-02-23
Filing date: 2016-02-23
Publication date: 2017-08-31
Anticipated expiration: 2036-02-23
Also published as: JP6652402B2

Abstract

PROBLEM TO BE SOLVED: To provide a pointer clock with a hand position detection function of an optical detection system having a stable hand position detecting performance, the pointer clock being capable of conveying a light emitted from a light emission element to a light receiving element efficiently if the position where the light emission element is equipped has been changed slightly.SOLUTION: In the pointer clock with a hand position detection function in which a light emission element 6 is opposed to a light receiving element 7 through a light guide hole 8 in a base plate 1 and a light guide hole 9 in a hand position detecting car 3, the area of the opening of an entrance port 8a opposed to the light emission element 6 is larger than the area of the opening of an exit port 8b opposed to the light receiving element 7 in the light guide hole 8.SELECTED DRAWING: Figure 2

Description

本発明は、針位置検出機能を備えた指針時計に関する。 The present invention relates to a pointer timepiece having a hand position detection function.

従来、時刻表示用の時針、分針、秒針や、機能表示用の機能針を備えた多針の指針時計が広く普及している。そしてこのような多針時計では指針機能や電波修正機能において、指針の位置検出を行って指針の位置を確認する必要がある。 2. Description of the Related Art Conventionally, a multi-needle timepiece clock having an hour hand, a minute hand, and a second hand for time display and a function hand for function display has been widely used. In such a multi-hand timepiece, it is necessary to check the position of the pointer by detecting the position of the pointer in the pointer function and the radio wave correction function.

この指針の位置検出方法としてはいろいろあるが、実際に採用されている方式としては発光素子と受光素子を組み合わせた光学検出方式があり、この光学検出方式の提案が多くなされている（例えば特許文献１）。 There are various methods for detecting the position of the pointer, but as an actually adopted method, there is an optical detection method combining a light emitting element and a light receiving element, and many proposals of this optical detection method have been made (for example, Patent Documents). 1).

以下特許文献１に記載された多針時計に付いて説明する。
特許文献１に示された多針時計における光学検出装置は、特許文献１の図７に示す如く発光素子と受光素子の間に配置された基板（軸受部材）と針位置検出車に形成された光透過孔を有している。
そして、基板に形成された光透過孔と、回転してきた針位置検出車との光透過孔とが重なった時に、発光素子の出射光が基板の光透過孔と針位置検出車の光透過孔を通過して受光素子に受光され、この検出信号により針位置が検出される。 The multi-hand timepiece described in Patent Document 1 will be described below.
The optical detection device in the multi-hand timepiece disclosed in Patent Document 1 is formed on a substrate (bearing member) disposed between a light emitting element and a light receiving element and a hand position detection wheel as shown in FIG. 7 of Patent Document 1. It has a light transmission hole.
Then, when the light transmission hole formed in the substrate and the light transmission hole of the rotating needle position detection wheel overlap, the light emitted from the light emitting element emits the light transmission hole of the substrate and the light transmission hole of the needle position detection wheel. Is received by the light receiving element, and the needle position is detected by this detection signal.

特開２０１２−７９６５号公報（図７、図８）JP 2012-7965 A (FIGS. 7 and 8)

特許文献１に示される従来例は、基板（軸受部材）や針位置検出車に形成された光透過孔はいずれもストレート形状を有している。
しかしこのようなストレート形状の光透過孔の場合、発光素子が光透過孔の中心位置に正確に実装されている場合には良好な光学的検出が行われるが、発光素子の実装位置が光透過孔の中心位置から外れると、発光素子の出射光のうち光透過孔に入射される光量が減少するため、受光素子の受光量の減少により正しい光学検出が行われなくなるという問題が発生する。 In the conventional example shown in Patent Document 1, the light transmission holes formed in the substrate (bearing member) and the needle position detection wheel all have a straight shape.
However, in the case of such a light-transmitting hole having a straight shape, good optical detection is performed when the light-emitting element is accurately mounted at the center position of the light-transmitting hole. When deviating from the center position of the hole, the amount of light emitted from the light emitting element is incident on the light transmitting hole is reduced, which causes a problem that correct optical detection cannot be performed due to a decrease in the amount of light received by the light receiving element.

上記発光素子の実装位置を、光透過孔の中心位置に正確に合わせることは、量産上かなり困難であり、量産される針位置検出機能付き指針時計においては、各指針時計ごとに発光素子の実装位置が一定範囲でバラツキを有するため針位置の検出状態に変化が生じ、針位置検出性能の安定した指針時計を量産することが困難となる。 Accurately aligning the mounting position of the light-emitting element with the center position of the light transmission hole is extremely difficult in mass production. Since the position varies within a certain range, a change occurs in the detection state of the hand position, and it becomes difficult to mass-produce hands with stable hand position detection performance.

本発明は、上記問題を解決し、量産上で発生する発光素子の実装位置のバラツキに対して針位置の検出状態を安定化し、針位置検出性能の安定した指針時計を提供することを目的とする。 An object of the present invention is to solve the above-mentioned problems, to stabilize the detection state of the hand position against the variation in the mounting position of the light emitting element that occurs in mass production, and to provide a pointer watch with stable hand position detection performance. To do.

上記目的を達成するため本発明の針位置検出機能付き指針時計における構成は、発光素子が、基板に設けられた導光穴と針位置検出車に設けられた検出穴とを通して、受光素子と対向する針位置検出機能付き指針時計において、導光穴は発光素子に対向する入射口の
開口面積が、受光素子に対向する出射口の開口面積より大きいことを特徴とする。 In order to achieve the above object, the pointer timepiece with a hand position detection function of the present invention is configured such that the light emitting element faces the light receiving element through the light guide hole provided in the substrate and the detection hole provided in the hand position detection wheel. In the pointer timepiece with a hand position detection function, the light guide hole is characterized in that the opening area of the entrance opening facing the light emitting element is larger than the opening area of the exit opening facing the light receiving element.

上記構成により、本発明の針位置検出機能付き指針時計は、導光穴の発光素子に対向する入射口の開口面積を、受光素子に対向する出射口の開口面積より大きくすることによって、導光穴の入射口に対する発光素子の実装位置が多少変化しても、発光素子の出射光を効率良く受光素子へ伝達することができ、針位置検出性能の安定した指針時計の量産が可能となる。 With the above configuration, the pointer timepiece with a hand position detection function according to the present invention guides the light by making the opening area of the entrance opening facing the light emitting element of the light guide hole larger than the opening area of the exit opening facing the light receiving element. Even if the mounting position of the light emitting element with respect to the hole entrance is slightly changed, the light emitted from the light emitting element can be efficiently transmitted to the light receiving element, and mass production of hands with a stable hand position detection performance becomes possible.

導光穴は、入射口から出射口に向かって、テーパー形状を有していても良い。 The light guide hole may have a taper shape from the entrance to the exit.

導光穴は、出射口の近傍にストレート形状を有していても良い。 The light guide hole may have a straight shape in the vicinity of the emission port.

上記構成により、導光穴の入射口からの入射光をテーパー形状によって効率良く出射口に集光させることができ、針位置検出性能の安定化が可能となる。 With the above configuration, incident light from the entrance of the light guide hole can be efficiently condensed on the exit by the tapered shape, and the needle position detection performance can be stabilized.

検出穴における入射口側の開口面積が、検出穴における出射口側の開口面積より大きくても良い。
上記構成により、針位置検出車の検出穴を通過する検出光の損失を少なくすることができる。 The opening area on the incident port side in the detection hole may be larger than the opening area on the emission port side in the detection hole.
With the above configuration, loss of detection light passing through the detection hole of the needle position detection wheel can be reduced.

針位置検出車を複数有し、出射口の位置で検出穴が互いに重なるように構成されても良い。 A plurality of needle position detection wheels may be provided, and the detection holes may overlap each other at the position of the emission port.

上記のとおり、本発明の針位置検出機能付き指針時計は、導光穴の発光素子に対向する入射口の開口面積を、受光素子に対向する出射口の開口面積より大きくすることによって、導光穴の入射口に対する発光素子の実装位置が多少変化しても、発光素子の出射光を効率良く受光素子へ伝達することができ、針位置検出性能の安定した指針時計の量産が可能となる。 As described above, the pointer timepiece with the hand position detection function of the present invention guides light by making the opening area of the light entrance hole facing the light emitting element larger than the opening area of the light exit opening facing the light receiving element. Even if the mounting position of the light emitting element with respect to the hole entrance is slightly changed, the light emitted from the light emitting element can be efficiently transmitted to the light receiving element, and mass production of hands with a stable hand position detection performance becomes possible.

第１実施形態の位置検出機能付き指針時計における要部断面図である。It is principal part sectional drawing in the pointer timepiece with a position detection function of 1st Embodiment. 図１に示す位置検出機能付き指針時計の針位置検出部の拡大断面図である。It is an expanded sectional view of the hand position detection part of the pointer timepiece with position detection function shown in FIG. 図２に示す針位置検出部の導光状態を示す要部断面図である。It is principal part sectional drawing which shows the light guide state of the needle position detection part shown in FIG. 図２に示す導光穴と発光素子の実装位置との関係を示す平面図である。It is a top view which shows the relationship between the light guide hole shown in FIG. 2, and the mounting position of a light emitting element. 導光穴と発光素子の実装位置との関係の参考例を示す平面図である。It is a top view which shows the reference example of the relationship between the light guide hole and the mounting position of a light emitting element. 第２実施形態の針位置検出機能付き指針時計における要部断面図である。It is principal part sectional drawing in the hand timepiece with a hand position detection function of 2nd Embodiment. 第３実施形態の針位置検出機能付き指針時計における要部断面図である。It is principal part sectional drawing in the hand timepiece with a hand position detection function of 3rd Embodiment.

以下、図面に基づいて本発明の実施形態を詳述する。ただし、以下に示す実施の形態は、本発明の思想を具体化するための針位置検出機能付き指針時計を例示するものであって、本発明を以下の構成に特定するわけではない。特に実施の形態に記載されている構成部品の寸法、材質、形状、その相対的配置等は、特定的な記載がない限り本発明の範囲をそれのみに限定する趣旨ではなく、単なる説明例に過ぎない。以下の説明において、同一部品、同一構成要素には同一の名称、符号を付し詳細説明を適宜省略することがある。 Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. However, the embodiment described below is an example of a hand timepiece with a hand position detection function for embodying the idea of the present invention, and the present invention is not limited to the following configuration. In particular, the dimensions, materials, shapes, relative arrangements, and the like of the component parts described in the embodiments are not intended to limit the scope of the present invention only to specific examples unless otherwise specified. Not too much. In the following description, the same parts and the same components are denoted by the same names and reference numerals, and detailed description may be omitted as appropriate.

（第１実施形態）
図１〜図５を用いて本発明の第１実施形態の針位置検出機能付き指針時計（以後「指針時計」と略記する）について説明する。 (First embodiment)
A pointer timepiece with a hand position detection function (hereinafter abbreviated as “pointer timepiece”) according to the first embodiment of the present invention will be described with reference to FIGS.

図１は第１実施形態の指針時計における要部断面図である。図２は図１に示す指針時計の針位置検出部の拡大断面図である。図３は図２に示す針位置検出部の導光状態を示す要部断面図である。図４は図２に示す導光穴と発光素子の実装位置との関係を示す平面図である。図５は導光穴と発光素子の実装位置との関係の参考例を示す平面図である。 FIG. 1 is a cross-sectional view of a main part of the pointer timepiece according to the first embodiment. FIG. 2 is an enlarged cross-sectional view of the hand position detection unit of the pointer timepiece shown in FIG. FIG. 3 is a cross-sectional view of a main part showing a light guide state of the needle position detection unit shown in FIG. FIG. 4 is a plan view showing the relationship between the light guide holes shown in FIG. 2 and the mounting positions of the light emitting elements. FIG. 5 is a plan view showing a reference example of the relationship between the light guide hole and the mounting position of the light emitting element.

（第１実施形態における指針時計の構成説明・図１）
図１は第１実施形態における指針時計の要部断面図であり、指針時計のムーブメントにおける針位置検出に必要な部分のみを示している。１０は指針時計であり、地板を構成する基板１と輪列受２に設けられた軸受穴１ａ、２ａに針位置検出車３が軸支されている。さらに基板１の下面側に発光素子６を実装した回路基板４が設けられ、輪列受２の上面側に受光素子７を実装した回路基板５が設けられている。 (Description of the configuration of the hand clock in the first embodiment, FIG. 1)
FIG. 1 is a cross-sectional view of a main part of the pointer timepiece according to the first embodiment, and shows only a portion necessary for detecting the hand position in the movement of the pointer timepiece. Reference numeral 10 denotes a pointer timepiece, and a hand position detection wheel 3 is pivotally supported in bearing holes 1a and 2a provided in the base plate 1 and the train wheel bridge 2 constituting the main plate. Further, a circuit board 4 on which the light emitting element 6 is mounted is provided on the lower surface side of the substrate 1, and a circuit board 5 on which the light receiving element 7 is mounted on the upper surface side of the train wheel bridge 2.

基板１には導光穴８が設けられ、針位置検出車３には、基板１の導光穴８と対応する位置に検出穴９が設けられている。そして発光素子６と受光素子７とが、導光穴８と検出穴９を通して対向位置に実装されており、発光素子６の出射光が導光穴８と検出穴９を通して受光素子７に受光される。 The substrate 1 is provided with a light guide hole 8, and the needle position detection wheel 3 is provided with a detection hole 9 at a position corresponding to the light guide hole 8 of the substrate 1. The light emitting element 6 and the light receiving element 7 are mounted at opposing positions through the light guide hole 8 and the detection hole 9, and the light emitted from the light emitting element 6 is received by the light receiving element 7 through the light guide hole 8 and the detection hole 9. The

図１において点線Ａで囲む部分が本発明における針位置検出部であり、基板１に設けられた導光穴８、針位置検出車３に設けられた検出穴９、導光穴８と検出穴９の位置に対応して設けられた発光素子６と受光素子７とによって構成されている。 In FIG. 1, a portion surrounded by a dotted line A is a needle position detection unit according to the present invention, a light guide hole 8 provided in the substrate 1, a detection hole 9 provided in the needle position detection wheel 3, a light guide hole 8 and a detection hole. The light-emitting element 6 and the light-receiving element 7 are provided corresponding to the position 9.

（第１実施形態における指針時計の動作説明・図１）
図示は省略したが、指針時計１０のムーブメントにおける輪列機構の動作に従って検出しようとする輪列（例えば秒針検出の場合は秒針車）に連動して、針位置検出車３が回転している。針位置検出車３の回転位置によって、検出穴９の位置が基板１に設けた導光穴８の位置とずれていると、発光素子６からの出射光Ｐは針位置検出車３によって遮られて受光素子７に受光されず、針位置検出は行われない。 (Explanation of operation of the hand clock in the first embodiment, FIG. 1)
Although not shown, the hand position detection wheel 3 rotates in conjunction with a train wheel to be detected in accordance with the operation of the train wheel mechanism in the movement of the pointer clock 10 (for example, the second hand wheel in the case of second hand detection). If the position of the detection hole 9 is shifted from the position of the light guide hole 8 provided in the substrate 1 due to the rotation position of the needle position detection wheel 3, the emitted light P from the light emitting element 6 is blocked by the needle position detection wheel 3. Thus, no light is received by the light receiving element 7 and the needle position is not detected.

針位置検出車３が回転して行って、検出穴９の位置が基板１に設けた導光穴８の位置に一致すると発光素子６からの出射光Ｐは導光穴８、検出穴９を通過して受光素子７に検出光として受光され、受光素子７から針位置を知らせる検出信号が出力される。 When the needle position detection wheel 3 rotates and the position of the detection hole 9 coincides with the position of the light guide hole 8 provided in the substrate 1, the emitted light P from the light emitting element 6 passes through the light guide hole 8 and the detection hole 9. The light is received by the light receiving element 7 as detection light, and a detection signal is output from the light receiving element 7 informing the needle position.

（針位置検出部の詳細説明・図２）
次に、図２により図１における針位置検出部Ａについて詳細に説明する。
図２は針位置検出部Ａの拡大断面図であり、導光穴８の形状は発光素子６に対向する入射口８ａの開口面積が、受光素子７に対向する出射口８ｂの開口面積より大きくなっている。そして入射口８ａから出射口８ｂに向かってテーパー形状部８ｃが形成され、出射口８ｂの近傍部分にはストレート形状部８ｄが形成されている。 (Detailed explanation of the needle position detection unit, Fig. 2)
Next, the needle position detector A in FIG. 1 will be described in detail with reference to FIG.
FIG. 2 is an enlarged cross-sectional view of the needle position detector A. The shape of the light guide hole 8 is such that the opening area of the entrance 8 a facing the light emitting element 6 is larger than the opening area of the exit 8 b facing the light receiving element 7. It has become. A tapered portion 8c is formed from the entrance 8a toward the exit 8b, and a straight portion 8d is formed in the vicinity of the exit 8b.

また、導光穴８の形状は出射口８ｂの開口面積は針位置検出車３に設けられた検出穴９と略同じ開口面積を有するが、入射口８ａの開口面積は発光素子６の発光面の面積より大きな開口面積を有している。 Further, the shape of the light guide hole 8 is the same as that of the detection hole 9 provided in the needle position detection wheel 3 while the opening area of the emission port 8 b is substantially the same as that of the detection hole 9 provided in the needle position detection wheel 3. The opening area is larger than the area.

（針位置検出部の光学検出動作の説明・図３〜図５）
図３Ａ、図３Ｂは図２に示す針位置検出部Ａにおける光学検出動作を示しており、図３Ａは発光素子６が導光穴８の中心位置に正確に合わせて実装されている状態を示し、図３Ｂは発光素子６が導光穴８の中心位置からずれた位置に実装されている状態を示している。 (Explanation of the optical detection operation of the needle position detection unit, FIGS. 3 to 5)
3A and 3B show an optical detection operation in the needle position detection unit A shown in FIG. 2, and FIG. 3A shows a state in which the light emitting element 6 is mounted in exact alignment with the center position of the light guide hole 8. 3B shows a state in which the light emitting element 6 is mounted at a position shifted from the center position of the light guide hole 8.

図３Ａに示す如く、発光素子６の中心６ｅが導光穴８の中心位置８ｅに正確に実装され
ていると、発光素子６の中心の出射光Ｐ１、左側の出射光Ｐ２、右側の出射光Ｐ３はいずれも導光穴８の入射口８ａの範囲内に入射して、導光穴８の出射口８ｂ、針位置検出車３の検出穴９を通過して、すべての出射光が受光素子７に検出光として受光される。 As shown in FIG. 3A, when the center 6e of the light-emitting element 6 is accurately mounted at the center position 8e of the light guide hole 8, the emitted light P1 at the center of the light-emitting element 6, the emitted light P2 on the left, and the emitted light on the right P3 enters all within the range of the entrance 8a of the light guide hole 8, passes through the exit 8b of the light guide hole 8, and the detection hole 9 of the needle position detection wheel 3, and all the emitted light is received by the light receiving element. 7 is received as detection light.

次に図３Ｂは、発光素子６の中心６ｅが導光穴８の中心位置８ｅからΔｔだけ右側にずれて実装された状態を示している。しかし導光穴８の入射口８ａの開口面積が発光素子６の発光面の面積より大きく形成されているため、発光素子６の実装位置がΔｔだけ右にずれて実装されても発光素子６の発光面が、導光穴８の入射口８ａの開口の範囲から外れることがなく、右側の出射光Ｐ３は上方に出射した後、導光穴８のテーパー形状部８ｃによって内側に反射されて出射口８ｂから出射される。この結果発光素子６からの出射光Ｐ１、Ｐ２、Ｐ３は導光穴８の出射口８ｂ、針位置検出車３の検出穴９を通過して、すべての出射光が受光素子７に検出光として受光される。 Next, FIG. 3B shows a state in which the center 6e of the light emitting element 6 is mounted shifted from the center position 8e of the light guide hole 8 to the right by Δt. However, since the opening area of the entrance 8a of the light guide hole 8 is larger than the area of the light emitting surface of the light emitting element 6, even if the mounting position of the light emitting element 6 is shifted to the right by Δt, The light emitting surface does not deviate from the range of the entrance 8 a of the light guide hole 8, and the right outgoing light P <b> 3 is emitted upward and then reflected inward by the tapered portion 8 c of the light guide hole 8. The light is emitted from the mouth 8b. As a result, the outgoing lights P1, P2, and P3 from the light emitting element 6 pass through the outgoing opening 8b of the light guide hole 8 and the detection hole 9 of the needle position detection wheel 3, and all the outgoing light is sent to the light receiving element 7 as detection light. Received light.

上記のごとく従来は、発光素子６の実装位置がずれた場合、受光素子７へ届く光量が減少するため、発光素子６の発光量を増やさないと受光素子７は検出光を十分に検出することができない。 As described above, conventionally, when the mounting position of the light-emitting element 6 is shifted, the amount of light reaching the light-receiving element 7 is reduced. Therefore, the light-receiving element 7 can sufficiently detect the detection light unless the light emission amount of the light-emitting element 6 is increased. I can't.

しかし、発光素子６の発光量を増やすと、消費電力が高くなり、検出穴を通過していない出射光が回折して受光素子７へ届き、誤検出が行われる等の問題がある。 However, when the light emission amount of the light emitting element 6 is increased, the power consumption increases, and there is a problem that the outgoing light that has not passed through the detection hole is diffracted and reaches the light receiving element 7 and erroneous detection is performed.

このため、本発明では導光穴８の入射口８ａの開口面積を大きくし、内部にテーパー形状部８ｃを設けることで、低消費電力で誤検出の可能性を低くすることができる。 For this reason, in the present invention, by increasing the opening area of the entrance 8a of the light guide hole 8 and providing the tapered portion 8c therein, the possibility of erroneous detection can be reduced with low power consumption.

また、導光穴８のテーパー部８ｃは中心からずれた出射光を内側に反射させる機能を有するため、反射性を良くするために鏡面仕上げを施したり、金属蒸着等を行うことが望ましい。 In addition, since the tapered portion 8c of the light guide hole 8 has a function of reflecting the outgoing light deviated from the center to the inside, it is desirable to perform mirror finish or perform metal vapor deposition to improve reflectivity.

次に図４、図５を用いて導光穴８の入射口８ａの開口面積と、発光素子６の実装位置ずれとの関係について説明する。 Next, the relationship between the opening area of the entrance 8a of the light guide hole 8 and the mounting position shift of the light emitting element 6 will be described with reference to FIGS.

図４は本発明における導光穴８の入射口８ａの開口面積を大きくした場合の発光素子６の実装位置との関係を示し、図５は従来の導光穴１８の入射口１８ａの開口面積を大きせず、ストレート形状として場合の発光素子６の実装位置との関係を対比のために示している。 4 shows the relationship with the mounting position of the light emitting element 6 when the opening area of the entrance 8a of the light guide hole 8 in the present invention is increased, and FIG. 5 shows the opening area of the entrance 18a of the conventional light guide hole 18. For comparison, the relationship with the mounting position of the light-emitting element 6 in a straight shape is shown.

図４（ａ）は導光穴８の入射口８ａと出射口８ｂに対する、発光素子６の実装位置を示しており、実線で示す発光素子６は導光穴８の入射口８ａの中心位置に実装された状態であり、点線で示す発光素子６は導光穴８の入射口８ａの中心位置から左右方向にずれて実装された状態を示している。 FIG. 4A shows the mounting position of the light emitting element 6 with respect to the entrance 8 a and the exit 8 b of the light guide hole 8, and the light emitting element 6 indicated by a solid line is at the center position of the entrance 8 a of the light guide hole 8. In the mounted state, the light emitting element 6 indicated by a dotted line shows a state where the light emitting element 6 is mounted shifted from the center position of the incident port 8a of the light guide hole 8 in the left-right direction.

図４（ｂ）も導光穴８の入射口８ａと出射口８ｂに対する、発光素子６の実装位置を示しており、実線で示す発光素子６は導光穴８の入射口８ａの中心位置に実装された状態であり、点線で示す発光素子６は導光穴８の入射口８ａの中心位置から上下方向にずれて実装された状態を示している。 FIG. 4B also shows the mounting position of the light emitting element 6 with respect to the entrance 8 a and the exit 8 b of the light guide hole 8, and the light emitting element 6 indicated by a solid line is at the center of the entrance 8 a of the light guide hole 8. In the mounted state, the light emitting element 6 indicated by a dotted line shows a state where the light emitting element 6 is mounted shifted from the center position of the incident port 8a of the light guide hole 8 in the vertical direction.

図４（ａ）、図４（ｂ）に示すごとく、本発明の導光穴８の入射口８ａの開口面積を大きくし、内部にテーパー形状部８ｃを設けて集光を行うことによって、発光素子６の実装位置が左右、上下に所定量ずれても、発光素子６からのすべての出射光を受光素子７は検出光として受光することができる。 As shown in FIGS. 4 (a) and 4 (b), light is emitted by increasing the opening area of the entrance 8a of the light guide hole 8 of the present invention and providing a tapered portion 8c inside to collect light. Even if the mounting position of the element 6 is deviated by a predetermined amount from side to side and up and down, the light receiving element 7 can receive all emitted light from the light emitting element 6 as detection light.

また、導光穴８の入射口８ａの開口面積を大きくし、内部にテーパー形状部８ｃを設けて集光を行うことによる発光素子６の実装位置ずれの修正機能は、導光穴８の大きくした開口面積から発光素子６の発光面が外れない範囲となるが、実際の量産における実装範囲のバラツキを考えると、導光穴８の入射口８ａと出射口８ｂとの関係は、入射口８ａの拡大を出射口８ｂの２倍程度とし、その間をテーパー形状部８ｃで接続するのが望ましい。今回の実施形態では出射口８ｂの径２５０ｍｍφに対し、入射口８ａの径を４００ｍｍφとした。 Further, the function of correcting the mounting position shift of the light emitting element 6 by condensing light by increasing the opening area of the entrance 8 a of the light guide hole 8 and providing a tapered portion 8 c inside is large for the light guide hole 8. Although the light emitting surface of the light emitting element 6 does not deviate from the aperture area, the relationship between the entrance 8a and the exit 8b of the light guide hole 8 is the entrance 8a in consideration of variations in the mounting range in actual mass production. It is desirable that the enlargement is approximately twice that of the exit port 8b, and that the connection is made between the tapered portions 8c. In the present embodiment, the diameter of the incident port 8a is set to 400 mmφ with respect to the diameter of the output port 8b of 250 mmφ.

また、導光穴８のテーパー形状部８ｃに続いて出射口８ｂの近傍にストレート形状部８ｄを設けることによって、テーパー形状部８ｃで反射集光された出射光の針位置検出車３の検出穴９に対する導入がスムーズに行えるようになった。 Further, by providing a straight shape portion 8d in the vicinity of the emission port 8b following the taper shape portion 8c of the light guide hole 8, the detection hole of the needle position detection wheel 3 of the emitted light reflected and collected by the taper shape portion 8c. 9 can be introduced smoothly.

次に図５により、対比のための参考例を説明する。 Next, a reference example for comparison will be described with reference to FIG.

図５は従来の導光穴１８の入射口１８ａの開口面積を大きせず、ストレート形状として場合の発光素子６の実装位置との関係を対比のために示しており、図５（ａ）は図４（ａ）と同様に発光素子６は導光穴１８の入射口１８ａの中心位置から左右方向にずれて実装された状態（点線で示す）を示している。 FIG. 5 shows the relationship with the mounting position of the light-emitting element 6 in the case of a straight shape without increasing the opening area of the entrance 18a of the conventional light guide hole 18, and FIG. Similar to FIG. 4A, the light emitting element 6 is mounted in a state shifted from the center position of the entrance 18 a of the light guide hole 18 in the left-right direction (shown by a dotted line).

また図５（ｂ）は図４（ｂ）と同様に発光素子６は導光穴１８の入射口１８ａの中心位置から上下方向にずれて実装された状態（点線で示す）を示している。 FIG. 5B shows a state (shown by a dotted line) in which the light-emitting element 6 is mounted with being shifted in the vertical direction from the center position of the entrance port 18a of the light guide hole 18 as in FIG. 4B.

図５（ａ）、図５（ｂ）に示すごとく、従来の導光穴１８がストレート形状の場合は、発光素子６の実装位置が左右、上下にずれると、発光素子６からの出射光の一部が導光穴１８の入射口１８ａに入射できなくなり、受光素子７の検出光が減少して正しい針位置検出ができなくなる。 As shown in FIGS. 5 (a) and 5 (b), when the conventional light guide hole 18 has a straight shape, if the mounting position of the light emitting element 6 is shifted left and right and up and down, the light emitted from the light emitting element 6 A part of the light cannot be incident on the incident port 18a of the light guide hole 18, and the detection light of the light receiving element 7 is reduced, so that the correct needle position cannot be detected.

（第２実施形態）
次に図６により、本発明の第２実施形態の指針時計について説明する。
図６は第２実施形態の指針時計２０における要部断面図であり、図１に示す第１実施形態の指針時計１０と基本的構成は同じであり、同一要素には同一番号を付し、重複する説明は省略する。 (Second Embodiment)
Next, referring to FIG. 6, a pointer timepiece according to a second embodiment of the present invention will be described.
FIG. 6 is a cross-sectional view of the main part of the pointer timepiece 20 of the second embodiment, the basic configuration is the same as that of the pointer timepiece 10 of the first embodiment shown in FIG. A duplicate description is omitted.

図６に示す第２実施形態の指針時計２０が、図１示す第１実施形態の指針時計１０と異なるところは、基板１に設けた導光穴の構成である。すなわち指針時計１０の導光穴８は内部形状として入射口８ａから出射口８ｂに向かってテーパー形状部８ｃが形成され、さらに出射口８ｂの近傍にストレート形状部８ｄを設けられていた。これに対し指針時計２０の導光穴１８は内部形状として、入射口１８ａから出射口１８ｂに向かってテーパー形状部１８ｃのみが形成されており、出射口１８ｂの近傍にストレート形状部がもうけられていないことである。 The pointer clock 20 of the second embodiment shown in FIG. 6 is different from the pointer clock 10 of the first embodiment shown in FIG. 1 in the configuration of the light guide hole provided in the substrate 1. That is, the light guide hole 8 of the pointer timepiece 10 has an internal shape formed with a tapered portion 8c from the entrance 8a to the exit 8b, and is further provided with a straight portion 8d in the vicinity of the exit 8b. On the other hand, the light guide hole 18 of the pointer watch 20 has an internal shape, and only a tapered portion 18c is formed from the entrance port 18a to the exit port 18b, and a straight shape portion is provided in the vicinity of the exit port 18b. It is not.

この指針時計２０の導光穴１８は、内部形状として単純にテーパー形状部１８ｃのみを形成すればよいため、加工が容易となり製造コストの点で有利となる。 The light guide hole 18 of the pointer timepiece 20 is simply formed with only the tapered portion 18c as an internal shape, and thus processing is facilitated, which is advantageous in terms of manufacturing cost.

（第３実施形態）
次に図７により、本発明の第３実施形態の指針時計について説明する。
図７は第３実施形態の指針時計３０における要部断面図であり、図１に示す第１実施形態の指針時計１０と基本的構成は同じであり、同一要素には同一番号を付し、重複する説明は省略する。 (Third embodiment)
Next, referring to FIG. 7, a pointer timepiece according to a third embodiment of the present invention will be described.
FIG. 7 is a cross-sectional view of the main part of the pointer timepiece 30 of the third embodiment. The basic configuration is the same as that of the pointer timepiece 10 of the first embodiment shown in FIG. 1, and the same elements are denoted by the same reference numerals. A duplicate description is omitted.

図７に示す第３実施形態の指針時計３０が、図１示す第１実施形態の指針時計１０と異なるところは、針位置検出車の数及び形状の違いである。すなわち指針時計１０の針位置検出車３に対応する、針位置検出車３３の検出穴３９の形状が異なっており、指針時計１０の針位置検出車３における検出穴９が矩形状であったのに対し、指針時計３０の針位置検出車３３の検出穴３９は、入射口３９ａ側の開口面積が出射口３９ｂ側の開口面積より大きい台形形状となっていることである。 The difference between the pointer timepiece 30 of the third embodiment shown in FIG. 7 and the pointer timepiece 10 of the first embodiment shown in FIG. 1 is the difference in the number and shape of the hand position detection wheels. That is, the shape of the detection hole 39 of the hand position detection wheel 33 corresponding to the hand position detection wheel 3 of the pointer timepiece 10 is different, and the detection hole 9 in the hand position detection wheel 3 of the handpiece timepiece 10 is rectangular. On the other hand, the detection hole 39 of the hand position detection wheel 33 of the pointer timepiece 30 has a trapezoidal shape in which the opening area on the incident port 39a side is larger than the opening area on the emission port 39b side.

さらに、指針時計３０は第２の針位置検出車４３を備えており、検出穴４９も針位置検出車３３の検出穴３９と同様、入射口側の開口面積が出射口側の開口面積より大きい台形形状となっている。 Furthermore, the hand timepiece 30 includes a second hand position detection wheel 43, and the detection hole 49 has a larger opening area on the entrance side than the opening area on the exit side, like the detection hole 39 of the hand position detection wheel 33. It has a trapezoidal shape.

指針時計３０の検出動作は、次のとおりである。すなわち、針位置検出車３３と針位置検出車４３とが回転していき、検出穴３９と検出穴４９との位置が重なって、基板１に設けた導光穴８の位置に一致すると、発光素子６からの出射光Ｐは導光穴８、検出穴３９、検出穴４９を通過して受光素子７に検出光として受光され、受光素子７から針位置を知らせる検出信号が出力される。 The detection operation of the pointer clock 30 is as follows. That is, when the needle position detection wheel 33 and the needle position detection wheel 43 are rotated and the positions of the detection hole 39 and the detection hole 49 overlap with each other to coincide with the position of the light guide hole 8 provided in the substrate 1, light emission is performed. Outgoing light P from the element 6 passes through the light guide hole 8, the detection hole 39, and the detection hole 49 and is received as detection light by the light receiving element 7, and a detection signal informing the needle position is output from the light receiving element 7.

この検出穴３９、検出穴４９は入射口側の開口面積を出射口側の開口面積より大きくすることによって、入射口側の入射光の取り込みを容易にして出射光の損失を少なくすることができる。 The detection hole 39 and the detection hole 49 have a larger opening area on the incident port side than the opening area on the emission port side, so that the incident light on the incident port side can be easily taken in and the loss of the emitted light can be reduced. .

なお、この入射口側の開口面積を出射口側の開口面積より大きくする構成は、複数の針位置検出車を有する構成において効果が高いが、針位置検出車が１つの構成においても効果を有するものである。 The configuration in which the opening area on the entrance side is larger than the opening area on the exit side is highly effective in a configuration having a plurality of needle position detection wheels, but is also effective in a configuration with a single needle position detection vehicle. Is.

以上のように本発明の指針時計における針位置検出部は、光学検出機構において導光穴の形状に拡大した入射口とテーパー形状部を設け、入射光を反射集光することによって、発光素子の実装バラツキをカバーし、針位置検出性能の安定した指針時計を量産することが出来る。 As described above, the hand position detection unit in the pointer timepiece of the present invention is provided with the incident port and the tapered part enlarged in the shape of the light guide hole in the optical detection mechanism, and reflects and condenses the incident light, thereby It is possible to mass produce timepieces that cover mounting variations and have stable hand position detection performance.

また、本実施形態では指針時計の秒針を検出する事例について説明したが、これに限定されるものではなく、針位置検出専用の車以外にも、あらゆる駆動用輪列及び他の回転体の検出に応用できる。 Further, in the present embodiment, the example of detecting the second hand of the hand clock has been described, but the present invention is not limited to this, and other than the vehicle dedicated to detecting the hand position, detection of all driving wheel trains and other rotating bodies Can be applied to.

１基板
２輪列受
３、３３、４３針位置検出車
４、５回路基板
６発光素子
７受光素子
８、１８導光穴
８ａ、１８ａ、３９ａ入射口
８ｂ、１８ｂ、３９ｂ出射口
８ｃ、１８ｃテーパー形状部
８ｄストレート形状部
９、３９，４９検出穴
１０，２０、３０指針時計 DESCRIPTION OF SYMBOLS 1 Substrate 2 Train wheel bridge 3, 33, 43 Needle position detection wheel 4, 5 Circuit board 6 Light-emitting element 7 Light-receiving element 8, 18 Light-guiding holes 8a, 18a, 39a Entrance 8b, 18b, 39b Exit 8c, 18c Taper Shape part 8d Straight shape part 9, 39, 49 Detection hole 10, 20, 30 Pointer watch

Claims

発光素子が、基板に設けられた導光穴と針位置検出車に設けられた検出穴とを通して、受光素子と対向する針位置検出機能付き指針時計において、
前記導光穴は、前記発光素子に対向する入射口の開口面積が、前記受光素子に対向する出射口の開口面積より大きい
ことを特徴とする針位置検出機能付き指針時計。 In the pointer timepiece with a needle position detection function, the light emitting element passes through the light guide hole provided in the substrate and the detection hole provided in the needle position detection wheel,
In the light guide hole, an opening area of an entrance opening facing the light emitting element is larger than an opening area of an exit opening facing the light receiving element.

前記導光穴は、前記入射口から前記出射口に向かって、テーパー形状を有する
ことを特徴とする請求項１に記載の針位置検出機能付き指針時計。 The hand clock according to claim 1, wherein the light guide hole has a tapered shape from the entrance to the exit.

前記導光穴は、前記出射口近傍にストレート形状を有する
ことを特徴とする請求項２に記載の針位置検出機能付き指針時計。 The hand clock according to claim 2, wherein the light guide hole has a straight shape in the vicinity of the exit.

前記検出穴における入射口側の開口面積が、前記検出穴における出射口側の開口面積より大きい
ことを特徴とする請求項１〜３のいずれか１つに記載の針位置検出機能付き指針時計。 The pointer timepiece with a hand position detecting function according to any one of claims 1 to 3, wherein an opening area of the detection hole in the detection hole is larger than an opening area of the detection hole in the detection hole.

前記針位置検出車を複数有し、
前記出射口の位置で、前記検出穴が互いに重なるように構成される
ことを特徴とする請求項１〜４のいずれか１つに記載の針位置検出機能付き指針時計。 A plurality of the needle position detection wheels,
The pointer timepiece with a hand position detection function according to claim 1, wherein the detection holes are configured to overlap each other at the position of the emission port.