JPH09211149A - Gear for time piece - Google Patents
Gear for time pieceInfo
- Publication number
- JPH09211149A JPH09211149A JP1787896A JP1787896A JPH09211149A JP H09211149 A JPH09211149 A JP H09211149A JP 1787896 A JP1787896 A JP 1787896A JP 1787896 A JP1787896 A JP 1787896A JP H09211149 A JPH09211149 A JP H09211149A
- Authority
- JP
- Japan
- Prior art keywords
- gear
- bearing hole
- recess
- timepiece
- injection molding
- 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.)
- Granted
Links
- 238000001746 injection moulding Methods 0.000 abstract description 5
- 239000000314 lubricant Substances 0.000 abstract 3
- 239000000243 solution Substances 0.000 abstract 1
- 239000010687 lubricating oil Substances 0.000 description 9
- 230000000717 retained effect Effects 0.000 description 5
- 239000003921 oil Substances 0.000 description 3
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 235000013372 meat Nutrition 0.000 description 1
- 229920002545 silicone oil Polymers 0.000 description 1
Landscapes
- Gears, Cams (AREA)
Abstract
Description
【０００１】[0001]
【発明の技術分野】本発明は時計用歯車に関するもので
ある。TECHNICAL FIELD OF THE INVENTION The present invention relates to a timepiece gear.
【０００２】[0002]
【従来の技術】置時計や掛時計等に用いられている時計
機械体の時計用歯車の大部分は、プラスチックの射出成
形品によって形成されている。時計用歯車の一般的な形
状はギア部とカナ部とが一体に形成してあり、ギア部と
カナ部の一方の側に所定の深さの軸受穴を設けるととも
に、他方の側に所定の高さのホゾが突設してあるものが
知られている。2. Description of the Related Art Most of the timepiece gears of a timepiece mechanical body used in a table clock, a wall clock and the like are formed of a plastic injection molded product. The general shape of a timepiece gear is that the gear portion and the pinion portion are integrally formed, and a bearing hole having a predetermined depth is provided on one side of the gear portion and the pinion portion, and the predetermined portion is formed on the other side. It is known that the height of the tenon is protruding.
【０００３】[0003]
【発明が解決しようとする課題】ところで、上記従来技
術の歯車の場合、ギア部の板厚が薄くカナ部を含む中央
部の容積が大きくなっている。このため射出成形時にお
いて中央部の収縮量が大きいため、いわゆる「ひけ」が
生じてギア部が変形するという問題がある。By the way, in the case of the above-mentioned conventional gear, the plate thickness of the gear portion is thin and the volume of the central portion including the pinion portion is large. For this reason, there is a problem in that the amount of shrinkage of the central portion during injection molding is large, so-called "sinking" occurs and the gear portion is deformed.
【０００４】また、軸受穴は底部が平面に形成してある
ため、ここに注油した場合に表面張力が弱く穴奥のコー
ナに保たれる油量が少ないため、ここに注油される潤滑
油の流出量が多く潤滑油切れを起すことがある。特に、
ロータカナと噛合している歯車は回転数が高いためこの
問題が大きい。Further, since the bottom portion of the bearing hole is formed to be flat, the surface tension is weak when the oil is injected into the bearing hole, and the amount of oil retained in the corner deep inside the hole is small. A large amount of spillage may cause lubricating oil to run out. Especially,
This problem is large because the gear meshing with the rotor cana has a high rotational speed.
【０００５】[0005]
【課題を解決するための手段】上記の問題を解決するた
めに、本発明の時計用歯車は、軸受穴の底部に中央部を
残して周囲を掘り下げてなる凹部を設けることにより、
歯車の中央部の容積を少なくして「ひけ」の発生の防止
を図るとともに、この凹部に保たれる潤滑油の量を多く
することによって潤滑油の切れをなくした。In order to solve the above problems, the timepiece gear of the present invention is provided with a recess formed by digging down the periphery of the bearing hole, leaving the central portion at the bottom.
The volume of the central part of the gear was reduced to prevent the occurrence of sink marks, and the amount of lubricating oil retained in this recess was increased to prevent the oil from running out.
【０００６】[0006]
【発明の実施の形態】本発明の時計用歯車は、ギア部と
カナ部とが一体に形成してあり、ギア部とカナ部の一方
の側には所定の深さの軸受穴が設けてあり、他方の側に
は所定の高さのホゾが形成してあるものに適用したもの
である。この時計用歯車において、軸受穴の底部に中央
部を残して、その底面をさらに所定の深さに掘り下げて
なる凹部を設けたものである。BEST MODE FOR CARRYING OUT THE INVENTION In the timepiece gear of the present invention, a gear portion and a pinion portion are integrally formed, and a bearing hole having a predetermined depth is provided on one side of the gear portion and the pinion portion. The present invention is applied to the one on which the tenon of a predetermined height is formed on the other side. In this timepiece gear, a recess is formed by leaving the central portion at the bottom of the bearing hole and further digging the bottom surface to a predetermined depth.
【０００７】[0007]
【実施例】図１に示すように、時計用歯車１は、プラス
チック材の射出成形品によって構成されており、大径の
ギア部２とこのギア部の一側面に軸を同じくする小径の
カナ部３とが一体に形成してある。カナ部３には軸を同
じくする所定の高さに形成したホゾ５が突設してあり、
ギア部２のカナ部３の反対側の面には所定深さの軸受穴
４がその軸をギア部２の軸と同じにして設けてある。DESCRIPTION OF THE PREFERRED EMBODIMENTS As shown in FIG. 1, a timepiece gear 1 is made of an injection-molded product made of a plastic material, and has a large-diameter gear portion 2 and a small-diameter pinion having a shaft on one side of this gear portion. The part 3 is integrally formed. A hook 5 formed in a predetermined height with the same axis is provided on the pin portion 3,
A bearing hole 4 having a predetermined depth is provided on the surface of the gear portion 2 on the opposite side of the pinion portion 3 so that the shaft thereof is the same as the shaft of the gear portion 2.
【０００８】軸受穴４は入口側に円錐台状のガイド部４
ａを形成してあり、このガイド部の内側からホゾ５に向
けて円筒状に掘り下げてある。軸受穴４の底部には、中
央部に円錐台状の突部４ｂを残して、軸穴の周囲に沿っ
て掘り下げてなる凹部６が設けてある。凹部６は、歯車
の中央部の肉の容積を少なくしているため、射出成形後
の温度の下降の際に生じる「ひけ」を少なくし、この
「ひけ」によるギア部の変形を少なくできる。The bearing hole 4 has a truncated cone-shaped guide portion 4 on the inlet side.
a is formed and is dug in a cylindrical shape from the inside of this guide portion toward the hoso 5. At the bottom of the bearing hole 4, there is provided a recess 6 which is dug down along the circumference of the shaft hole, leaving a truncated cone-shaped projection 4b at the center. Since the recess 6 has a reduced volume of meat in the central portion of the gear, it is possible to reduce “sinks” that occur when the temperature drops after injection molding, and to reduce deformation of the gears due to the “sinks”.
【０００９】また、軸受穴４には、シリコンオイル等の
潤滑油が注入されてから時計のケースと一体の地板７に
設けてある支持軸８が挿着される。軸受穴４に凹部６を
所定の深さに掘り下げて凹部６の表面積を大きく形成し
てあるので、凹部６に潤滑油を注油すると、表面張力に
よって凹部６に多量の潤滑油を保つことができる。In addition, a lubricating oil such as silicone oil is injected into the bearing hole 4 and then a support shaft 8 provided on a main plate 7 integral with the case of the timepiece is inserted. Since the recess 6 is dug down to a predetermined depth in the bearing hole 4 to increase the surface area of the recess 6, when lubricating oil is applied to the recess 6, a large amount of lubricating oil can be retained in the recess 6 due to surface tension. .
【００１０】時計用歯車のうち、特にロータカナと噛合
する歯車は、ロータからの高速かつ間欠的な回転力の伝
達を受けるため、荷重に対する負担が大きく、潤滑油の
果たす機能は大きなものとなっているので、多量の潤滑
油の保有を可能にした本発明の歯車の貢献度は大きい。
なお、本発明は時計用歯車以外にも各種の機器の歯車に
も応用可能である。Among the timepiece gears, the gear that meshes with the rotor pinion in particular receives a high-speed and intermittent rotational force from the rotor, and therefore bears a heavy load and the lubricating oil has a large function. Therefore, the contribution of the gear of the present invention, which enables a large amount of lubricating oil to be retained, is great.
The present invention can be applied to gears of various devices other than the gears for timepieces.
【００１１】[0011]
【発明の効果】本発明によれば、射出成形の際の「ひ
け」による変形を少なくできるので、精密な時計用歯車
が得られるとともに潤滑油の保有量を多くすることがで
き、潤滑油切れを生じることがない。According to the present invention, since deformation due to sink marks during injection molding can be reduced, a precise timepiece gear can be obtained and the amount of lubricating oil retained can be increased, so that the lubricating oil can run out. Does not occur.
【図１】展開断面図である。FIG. 1 is a developed sectional view.
１ 歯車 ２ ギア部 ３ カナ部 ４ 軸受穴 ５ ホゾ ６ 凹部 1 Gear 2 Gear 3 Cana 4 Bearing Hole 5 Recess 6 Recess
Claims (1)
り、上記ギア部と上記カナ部の一方の側には所定の深さ
の軸受穴が設けてあり、他方の側には所定の高さのホゾ
が形成してある時計用歯車において、上記軸受穴の底部
には、中央部を残して該軸受穴の底面をさらに所定の深
さに掘り下げてなる凹部が設けてあることを特徴とする
時計用歯車。1. A gear portion and a pinion portion are integrally formed, a bearing hole having a predetermined depth is provided on one side of the gear portion and the pinion portion, and a predetermined hole is formed on the other side. In a timepiece gear having a tenon at a height of, the bottom portion of the bearing hole is provided with a recess formed by further digging the bottom surface of the bearing hole to a predetermined depth. Characteristic clock gear.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP01787896A JP3354778B2 (en) | 1996-02-02 | 1996-02-02 | Clock gear |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP01787896A JP3354778B2 (en) | 1996-02-02 | 1996-02-02 | Clock gear |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH09211149A true JPH09211149A (en) | 1997-08-15 |
| JP3354778B2 JP3354778B2 (en) | 2002-12-09 |
Family
ID=11955958
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP01787896A Expired - Fee Related JP3354778B2 (en) | 1996-02-02 | 1996-02-02 | Clock gear |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3354778B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH700154A1 (en) * | 2008-12-24 | 2010-06-30 | Complitime Sa | Timepiece including a pivot member. |
-
1996
- 1996-02-02 JP JP01787896A patent/JP3354778B2/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH700154A1 (en) * | 2008-12-24 | 2010-06-30 | Complitime Sa | Timepiece including a pivot member. |
| WO2010072629A1 (en) * | 2008-12-24 | 2010-07-01 | Complitime Sa | Timepiece including a pivoting member |
| US8568020B2 (en) | 2008-12-24 | 2013-10-29 | Complitime Sa | Timepiece including a pivoting member |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3354778B2 (en) | 2002-12-09 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US7258037B2 (en) | Gear protected against overloading | |
| KR870003340A (en) | Ultra precision piping connector | |
| KR960043427A (en) | Rotor Shaft for Alternator | |
| KR900004533A (en) | Automotive all-in-one hub | |
| KR880001641Y1 (en) | MUSIC BOX | |
| JP3354778B2 (en) | Clock gear | |
| KR910007614A (en) | Geared tools | |
| JP2808118B2 (en) | Manufacturing method of plastic rotary damper | |
| JP2003090412A (en) | Injection molded plastic gear | |
| JPS5724876A (en) | Gear device for watch | |
| CN108572539B (en) | Pointer and watch | |
| JPS5926292Y2 (en) | Pointer structure | |
| KR810001409Y1 (en) | Escapements of electronic watch | |
| JP2002144365A (en) | Resin sleeve and manufacturing method therefor | |
| JPH0932909A (en) | Structure for preventing outflow of oil from gear and gear shaft | |
| JPH0596564A (en) | Inorganic material gear | |
| JPS625306Y2 (en) | ||
| JPS5825931A (en) | Rotor insert molding method | |
| JPH0435139Y2 (en) | ||
| JPH0519640Y2 (en) | ||
| JPS59122553U (en) | Rotation extractor for travel speedometer | |
| JPS6326787Y2 (en) | ||
| JPS5673261A (en) | Manufacture of insulating gear in motor tool, etc. | |
| JPH067089U (en) | Bearings for watch machinery | |
| JPS6146150A (en) | Rotor structure for timepiece |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |