JP3052889B2 - clock - Google Patents
clockInfo
- Publication number
- JP3052889B2 JP3052889B2 JP9121203A JP12120397A JP3052889B2 JP 3052889 B2 JP3052889 B2 JP 3052889B2 JP 9121203 A JP9121203 A JP 9121203A JP 12120397 A JP12120397 A JP 12120397A JP 3052889 B2 JP3052889 B2 JP 3052889B2
- Authority
- JP
- Japan
- Prior art keywords
- wheel
- hand
- train
- tenon
- plastic
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Landscapes
- Electromechanical Clocks (AREA)
Description
【発明の詳細な説明】
【０００１】
【発明の属する技術分野】本発明は輪列受あるいは４番
車にプラスチックを用いた時計の輪列構造の改良に関す
る。
【０００２】
【従来の技術】従来、プラスチック材料は成形コストは
安いものの、寸法精度に劣り、強度面でも金属と比較し
てはるかに弱かった為、腕時計の輪列、受類をプラスチ
ックに置き換えることなどとうていできなかった。とこ
ろが、近年プラスチック材料は目ざましい発展をみせ、
今一歩、金属には及ばないものの、かなり金属に近い寸
法精度、強度を持つプラスチック材料も各種開発されて
きている。この様な材料を地板等に採用した時計も出さ
れているが、人間の力が加わる様な部品、例えば切換機
構部品、針押し込みの力を受ける様な部品はプラスチッ
ク化できないでいた。輪列受や４番車をプラスチックで
作った場合、針押し込みの際にこれらの部品を破損して
しまうのである。
【０００３】
【発明が解決しようとする課題】このような不具合を解
決し、輪列受、４番車のプラスチック化を可能として、
部品のコストダウンを図ろうとするものである。
【０００４】
【課題を解決するための手段】本発明の時計は、地板を
貫通し中央に貫通穴を有し一端に分針が装着される分針
車、該分針車の貫通穴を貫通し一端に秒針が装着され他
端がプラスチックの輪列受に軸支される秒針車を有する
時計において、前記秒針車はツバ部を有し金属の秒針車
真とプラスチックの歯車を具備し、前記ツバ部の径は前
記分針車の貫通穴径よりも大きく、前記ツバ部と前記分
針車の端面とが接しており、前記秒針車の上ほぞ端面が
平面であると共に、前記秒針車が前記輪列受側に寄せら
れた状態において前記上ほぞが輪列受上面より飛び出し
ており、前記秒針車が前記輪列受とは反対側に寄せられ
た状態において前記上ほぞが上記輪列受上面から飛び出
していないことを特徴とする。
【０００５】
【発明の実施の形態】以下、図面に沿って説明する。
【０００６】図１は、本発明の第１の実施例であるが、
１は地板、２はプラスチックの輪列受、３はプラスチッ
クの４番歯車で、スチール製の４番真４と一体にインサ
ート成形されている。４ａは４番上ほぞで輪列受２に支
持されており、端面４ｂは平面になっていて柄径Ｄは
０．２ｍｍとなっている。この４番上ほぞは４番車が輪
列受側に寄せられた状態、つまり４番車の上アガキＡを
０とした状態では輪列受上面よりも飛び出すような寸法
関係になっている。逆に、４番車が輪列受とは反対側に
寄せられた図１の状態、つまり４番車の上アガキＡを有
する状態では４番上ほぞは輪列受上面から飛び出してい
ない寸法関係になっている。４ｃの４番真径大部は４番
歯車が抜けないように配慮したものであり、４ｅは秒針
取り付け部である。５は分針が取り付けられる２番車で
ある。
【０００７】本発明はこの様な構成になっていて、指針
の取り付けは焼き入れしたスチール等の硬い台で４番上
ほぞを受けて行なう。前述した様に、４番車の上アガキ
が０になる前に４番上柄の端面４ｂが輪列受２の上面よ
りも飛び出るようになっているので、この様に４番上ほ
ぞを受けて秒針付けを行なうと、輪列受には圧力は加わ
らず、４番歯車３にも圧力は加わらない。針押し込みの
力は３Kg以上にもなるので、もし本発明のように４番上
ほぞを長くしていないとプラスチックの輪列受や４番歯
車はつぶされてしまって用をなさなくなる。３Kgの力が
４番上ほぞに加わった場合、ほぞ径が０．２ｍｍの時の
圧縮応力は約９５Kg／mm2 であり、ほぞ径が０．１５ｍ
ｍの時は約１７０Kg／mm2 にもなり、これ以上だとほぞ
がつぶされたり座屈したりしてしまう。また、上ほぞ端
面が平面でなく秒針取り付け部４ｅの先端のように円錐
形に尖っていると、先端の圧縮応力は極めて高い値にな
って、例え焼入れしたスチールであってもつぶれてしま
う。一方、逆に、４番車が輪列受とは反対側に寄せられ
た図１の図示状態、つまり４番車の上アガキＡを有する
状態で４番上ほぞが輪列受上面から飛び出している寸法
関係になっている場合には、時計体の組立時等において
その飛び出し部に作業者や組立機器が触れ４番車のアガ
キを多くさせ、あるいはほぞガタを多くさせて各車の噛
み合い状態を狂わせてしまう。また、その飛び出し部が
ウラブタ等の外装部品に押圧される危険性を有し、その
場合には時計の止まり、狂いが生じるという致命的欠陥
となってしまう。
【０００８】本発明の実施例の様に構成すると、今述べ
たような、輪列受をつぶしたり、４番車をつぶしたりと
いった不具合は解決でき、輪列受のプラスチック化、４
番歯車のプラスチック化が可能となって大幅なコストダ
ウンが達成されるとともに、４番車のアガキやほぞガタ
をいたずらに多くすることもなく良好な各車の噛み合い
状態を確保することが出来るのである。
【０００９】分針の取り付けの場合も、２番車５が４番
真のツバ部４ｄに乗っているので、同様に４番上ほぞを
硬い台で受けて行ない、こうすることによって分針を押
し込む力が輪列受や４番歯車に加わることはない。
【００１０】
【発明の効果】以上述べた様に、本発明によれば輪列受
をプラスチックで構成することができ、もって大幅なコ
ストダウンが達成できるとともに、時計の止まりや狂い
を確実に防止するものであり、その効果は大きい。
【００１１】上記実施例ではプラスチックの輪列受の場
合のみを述べたが、４番上ほぞの支持に黄銅などの柔ら
かいブラッシュ等を使用した場合も、針押し込みの強い
力をこの様な柔らかいブッシュで受けることはできない
ので、本発明を適用することによって問題が解決され
る。Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in a train wheel train structure using plastic for a train wheel bridge or a fourth wheel. Conventionally, plastic materials have a low molding cost, but have inferior dimensional accuracy and are much weaker in strength than metals. I couldn't do it. However, in recent years, plastic materials have shown remarkable development,
At present, various plastic materials, which are not comparable to metals, but have dimensional accuracy and strength quite similar to metals, have been developed. Timepieces using such a material for the base plate and the like have been released, but parts to which human power is applied, such as switching mechanism parts and parts which receive the force of pushing the needle, cannot be made of plastic. If the train wheel bridge or the 4th wheel is made of plastic, these parts will be damaged when the needle is pushed. [0003] In order to solve such a problem, the train wheel bridge and the fourth car can be made plastic,
The aim is to reduce the cost of parts. [0004] A timepiece according to the present invention is a minute hand wheel which penetrates a base plate, has a through hole in the center, and has a minute hand attached to one end, and penetrates a through hole of the minute hand wheel to one end. In a timepiece having a second hand mounted with a second hand and having the other end pivotally supported by a plastic wheel train bearing, the second hand wheel has a collar portion, and has a metal second hand wheel true and a plastic gear wheel. The diameter is larger than the diameter of the through-hole of the minute hand wheel, the flange portion is in contact with the end face of the minute hand wheel, the upper tenon end face of the second hand wheel is flat, and the second hand wheel is on the wheel train receiving side. The upper tenon does not protrude from the upper wheel train receiving surface when the second hand wheel is moved to the opposite side of the wheel train receiving device when the upper tenon is protruded from the upper wheel train receiving surface. It is characterized by the following. [0005] [Embodiment of the invention will be described below with reference to the drawings. FIG. 1 shows a first embodiment of the present invention.
1 is a base plate, 2 is a plastic train wheel receiver, and 3 is a plastic 4th gear, which is insert-molded integrally with a steel 4th gear 4. 4a is supported on the train wheel bridge 2 by the fourth tenon, and the end face 4b is flat and the handle diameter D is 0.2 mm. The fourth upper tenon has a dimensional relationship such that the fourth wheel is protruded from the wheel train receiving upper surface when the fourth wheel is moved toward the train wheel receiving side, that is, when the upper agaki A of the fourth wheel is set to 0. Conversely, in the state of FIG. 1 in which the 4th wheel is shifted to the opposite side to the train wheel bridge, that is, in the state where the 4th wheel has the upper agaki A, the 4th mortise does not protrude from the upper surface of the wheel train bridge. It has become. The 4th true diameter large portion of 4c is designed to prevent the 4th gear from coming off, and 4e is a second hand mounting portion. Reference numeral 5 denotes a second wheel to which a minute hand is attached. The present invention has such a configuration, and the attachment of the pointer is performed by receiving a fourth tenon on a hard base such as hardened steel. As described above, the end face 4b of the fourth upper handle is designed to protrude from the upper surface of the train wheel bridge 2 before the upper aki of the fourth wheel becomes zero. When the second hand is attached, no pressure is applied to the train wheel bridge, and no pressure is applied to the fourth gear 3. Since the force of pushing the needle is 3 kg or more, if the tenth tenon is not long as in the present invention, the plastic train wheel bridge and the fourth gear are crushed and useless. When a force of 3 kg is applied to the fourth tenon, the compressive stress when the tenon diameter is 0.2 mm is about 95 kg / mm 2 and the tenon diameter is 0.15 m.
In the case of m, it becomes about 170 kg / mm 2, and if it is more than this, the tenon is crushed or buckled. Further, if the end face of the upper tenon is not flat but sharp in a conical shape like the tip of the second hand attaching portion 4e, the compressive stress at the tip becomes an extremely high value, and even hardened steel is crushed. On the other hand, on the other hand, in the state shown in FIG. 1 in which the 4th wheel is shifted to the opposite side to the train wheel bridge, that is, in the state having the upper agaki A of the 4th wheel, the 4th tenon gushes out from the train wheel bridge upper surface When the watch has a dimensional relationship, when the watch body is assembled, the protruding part is touched by an operator or assembling equipment to increase the number of rakes in the 4th car or to increase the play of the tenon, and the meshing condition of each car Crazy. In addition, there is a risk that the protruding portion is pressed by an exterior component such as a wobble, and in that case, there is a fatal defect that the timepiece stops and an error occurs. With the construction of the embodiment of the present invention, it is possible to solve the problems described above, such as crushing the train wheel bridge and crushing the 4th wheel.
Because the number wheel can be made of plastic, significant cost reduction can be achieved, and a good meshing state of each car can be ensured without unnecessarily increasing the number of agaki and tenon play on the number 4 wheel. is there. In the case of attaching the minute hand, since the second wheel & pinion 5 is riding on the No. 4 flange 4d, similarly, the fourth tenon is received by a hard base and the force for pushing the minute hand is thereby achieved. Is not added to the train wheel bridge or the fourth gear. As described above, according to the present invention, the train wheel bridge can be made of plastic, so that a significant cost reduction can be achieved, and the stoppage and disorder of the timepiece can be reliably prevented. The effect is great. In the above-described embodiment, only the case of a plastic train wheel bridge has been described. However, even when a soft brush such as brass is used to support the fourth mortise, a strong force of pushing the needle is applied to such a soft bush. Therefore, the problem is solved by applying the present invention.
【図面の簡単な説明】 【図１】本発明の第１の実施例。 【符号の説明】 １……地板 ２……輪列受 ３……４番歯車 ４……４番真 ５……２番車 ６……４番カナ ７……４番歯車 ８……３番歯車 ９……２番受[Brief description of the drawings] FIG. 1 shows a first embodiment of the present invention. [Explanation of symbols] 1 ... Ground plate 2 Wheel train receiver 3 ... 4th gear 4 ... 4th true 5 ... second car 6 ... 4th kana 7 ... 4th gear 8 ... gear 3 9 …… No.2
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 昭58−84258（ＪＰ，Ａ) 実開 昭54−118859（ＪＰ，Ｕ) 実開 昭58−8184（ＪＰ，Ｕ) 実開 昭58−82686（ＪＰ，Ｕ) 実開 昭55−115463（ＪＰ，Ｕ) 実開 昭60−146878（ＪＰ，Ｕ) 実開 昭57−72190（ＪＰ，Ｕ) (58)調査した分野(Int.Cl.7，ＤＢ名) G04B 1/00 - 49/04 G04C 3/14 ──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-58-84258 (JP, A) JP-A-54-118859 (JP, U) JP-A-58-8184 (JP, U) JP-A-58-8184 82686 (JP, U) Shokai 55-115463 (JP, U) Shokai 60-1446878 (JP, U) Shokai 57-72190 (JP, U) (58) Fields investigated (Int. 7, DB name) G04B 1/00 - 49/04 G04C 3/14
Claims (1)
される分針車、該分針車の貫通穴を貫通し一端に秒針が
装着され他端がプラスチックの輪列受に軸支される秒針
車を有する時計において、 前記秒針車はツバ部を有し金属の秒針車真とプラスチッ
クの歯車を具備し、前記ツバ部の径は前記分針車の貫通
穴径よりも大きく、前記ツバ部と前記分針車の端面とが
接しており、前記秒針車の上ほぞ端面が平面であると共
に、前記秒針車が前記輪列受側に寄せられた状態におい
て前記上ほぞが輪列受上面より飛び出しており、前記秒
針車が前記輪列受とは反対側に寄せられた状態において
前記上ほぞが上記輪列受上面から飛び出していないこと
を特徴とする時計。(57) [Claims] A minute hand having a through hole in the center and having a through hole in the center and having a minute hand mounted at one end, a second hand penetrating the through hole of the minute wheel and having a second hand mounted at one end and the other end pivotally supported by a plastic train wheel bridge. In a timepiece having a wheel, the second hand wheel has a collar portion, and is provided with a metal second hand wheel true and a plastic gear, the diameter of the collar portion is larger than the diameter of a through hole of the minute hand wheel, and The end surface of the minute hand wheel is in contact, the upper tenon end surface of the second hand wheel is flat, and the upper tenon is protruding from the wheel train receiving upper surface in a state where the second hand wheel is moved toward the wheel train receiving side. A timepiece wherein the upper tenon does not protrude from the upper surface of the wheel train receiving wheel in a state where the second hand wheel is moved to the side opposite to the wheel train receiving device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9121203A JP3052889B2 (en) | 1997-05-12 | 1997-05-12 | clock |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9121203A JP3052889B2 (en) | 1997-05-12 | 1997-05-12 | clock |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1118131A Division JPH0636037B2 (en) | 1989-05-11 | 1989-05-11 | Wheel train structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH1048349A JPH1048349A (en) | 1998-02-20 |
| JP3052889B2 true JP3052889B2 (en) | 2000-06-19 |
Family
ID=14805426
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9121203A Expired - Lifetime JP3052889B2 (en) | 1997-05-12 | 1997-05-12 | clock |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3052889B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022044584A1 (en) * | 2020-08-31 | 2022-03-03 | シチズン時計株式会社 | Wheel train holding structure and watch |
-
1997
- 1997-05-12 JP JP9121203A patent/JP3052889B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH1048349A (en) | 1998-02-20 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 20000307 |
|
| EXPY | Cancellation because of completion of term |