JP4985021B2 - clock - Google Patents

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JP4985021B2
JP4985021B2 JP2007080868A JP2007080868A JP4985021B2 JP 4985021 B2 JP4985021 B2 JP 4985021B2 JP 2007080868 A JP2007080868 A JP 2007080868A JP 2007080868 A JP2007080868 A JP 2007080868A JP 4985021 B2 JP4985021 B2 JP 4985021B2
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wheel
timepiece
pointer
train
gear
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JP2008241395A (en
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秀樹 神谷
栄一 永坂
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Seiko Epson Corp
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Seiko Epson Corp
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Description

本発明は、時計に係り、指針車が無負荷状態で駆動される機械式時計や電子制御式機械時計の改良に関する。   The present invention relates to a timepiece and relates to improvements in a mechanical timepiece and an electronically controlled mechanical timepiece in which a pointer wheel is driven in a no-load state.

従来、ぜんまいが巻ほどける時の機械的エネルギを駆動力とした機械式時計や電子制御式機械時計において、指針車のバックラッシュによる指示ずれを防止することが知られている（例えば特許文献１）。
図５には、特許文献１に記載の指示ずれ防止の構成が示されている。図５において、ぜんまい１Ａを内蔵した香箱車１の回転は、二番車２、三番車３、四番車４に伝達され、その後に図示しない五番車、六番車を介して、機械式時計であれば脱進機付きの調速機に伝達され、電子制御式時計であれば、調速機としても機能する発電機に伝達される。そして、香箱車１、二番車３、三番車３、四番車４〜の輪列は、ぜんまい１Ａのトルクが伝達される主輪列を形成している。 Conventionally, in a mechanical timepiece or an electronically controlled mechanical timepiece that uses mechanical energy when the mainspring is unwound as a driving force, it is known to prevent instruction deviation due to backlash of the indicator wheel (for example, Patent Document 1). ).
FIG. 5 shows a configuration for preventing an instruction shift described in Patent Document 1. In FIG. 5, the rotation of the barrel wheel 1 incorporating the mainspring 1A is transmitted to the second wheel 2, the third wheel 3, and the fourth wheel 4, and thereafter, the machine is passed through the fifth wheel and the sixth wheel (not shown). If it is a type timepiece, it is transmitted to a speed governor with an escapement, and if it is an electronically controlled timepiece, it is transmitted to a generator that also functions as a speed governor. The wheel trains of the barrel wheel 1, the second wheel 3, the third wheel 3, and the fourth wheel 4 to form a main wheel train to which the torque of the mainspring 1A is transmitted.

ところが、クロノグラフのように、中心からずれた位置に秒針１０などが位置する時計では、秒針１０が取り付けられる秒車１１は、そのような主輪列の三番車３によって無負荷状態で駆動されるため、抑制ばね９０によってバックラッシュが詰められるようになっており、バックラッシュ分のふらつきが抑制されるようになっている。   However, in a timepiece in which the second hand 10 is located at a position shifted from the center, such as a chronograph, the second wheel 11 to which the second hand 10 is attached is driven in an unloaded state by such a third wheel 3 of the main wheel train. Therefore, the backlash is filled by the restraining spring 90, and the fluctuation of the backlash is suppressed.

特開平２００６−２４２７９３号公報Japanese Patent Laid-Open No. 2006-242793

しかしながら、図５に示すクロノグラフの場合では、二番車２および４番車を貫通するハートカム軸９１に設けられたハートカム９２を、復針レバー９３で強制的に押圧して定位置に戻し、よってハートカム軸９１先端の図示しない秒ＣＧ（クロノグラフの略称）針を帰零させるのであるが、復針レバー９３によるハートカム９２の押圧によりハートカム軸９１が撓んでしまうと、その撓みによりハートカム軸９１や四番車４が僅かにふらついて回転し、三番車３や秒車１１にも回転が伝達される。   However, in the case of the chronograph shown in FIG. 5, the heart cam 92 provided on the heart cam shaft 91 that passes through the second wheel 2 and the fourth wheel is forcibly pressed by the hammer 93 and returned to the home position. Therefore, a second CG (abbreviated chronograph) hand (not shown) at the tip of the heart cam shaft 91 is returned to zero. And the fourth wheel 4 slightly fluctuates and rotates, and the rotation is transmitted to the third wheel 3 and the second wheel 11.

この際、三番車３から秒車１１へは増速による伝達であるため、四番車４や三番車３の僅かなふらつきが秒車１１では大きな回転角度となって現れてしまい、秒針１０の飛び量が大きくなって指示ずれが生じるという問題がある。特に、抑制ばね９０によりバックラッシュが詰まっていると、三番車３の回転が秒車１１に確実に伝達されるため、秒針１０の指示ずれがより目立ち易くなる。また、このような問題は、クロノグラフが搭載された時計に限らず、指針車が無負荷状態で駆動される時計であれば生じる可能性がある。   At this time, since the transmission from the third wheel 3 to the second wheel 11 is transmitted by speed increase, a slight wobbling of the fourth wheel 4 or the third wheel 3 appears as a large rotation angle in the second wheel 11 and the second hand. There is a problem that the jump amount of 10 becomes large and the instruction shift occurs. In particular, if the backlash is clogged by the restraining spring 90, the rotation of the third wheel & pinion 3 is reliably transmitted to the second wheel 11, so that the indication deviation of the second hand 10 becomes more conspicuous. Such a problem may occur not only in a timepiece equipped with a chronograph but also in a timepiece in which a pointer wheel is driven in a no-load state.

本発明の目的は、無負荷状態で駆動される指針車のふらつきを抑制して指針による指示ずれを防止できる時計を提供することにある。   An object of the present invention is to provide a timepiece that can prevent the indicator from being displaced by suppressing the wobbling of the indicator wheel that is driven in a no-load state.

本発明の時計は、ぜんまいからのトルクの伝達経路を形成する主輪列と、この主輪列に連結されて回転する副輪列とを備え、前記副輪列は、指針が取り付けられた指針車と、前記主輪列を構成する番車の歯車および前記指針車の歯車の両方に噛み合う中間かなとを含んで構成され、前記中間かなの回転は前記指針車へ減速して伝達されることを特徴とする。   The timepiece of the present invention includes a main train wheel that forms a transmission path of torque from the mainspring, and a sub train wheel that is connected to the main train wheel and rotates. A vehicle and an intermediate pinion that meshes with both the gear of the number wheel constituting the main wheel train and the gear of the pointer wheel, and the rotation of the intermediate pinion is transmitted to the pointer wheel at a reduced speed. It is characterized by.

この発明によれば、指針車への回転は、中間かなを介して減速して伝達されるため、中間かなと噛み合う番車のふらつきが指針車にて増大する心配がなく、指針車に取り付けられた指針による指示ずれを良好に防止できる。
なお、本発明を指針がスイープ運針する電子制御式機械時計に適用した場合には、指示ずれが生じる際の針飛びがなくなることで、見栄えの良さをより強調できる。 According to the present invention, the rotation to the pointer wheel is transmitted by decelerating through the intermediate pinion, so that there is no fear that the wobbling of the wheel that meshes with the intermediate pinion increases in the pointer wheel, and it is attached to the pointer wheel. It is possible to prevent misdirection due to the pointer.
In addition, when the present invention is applied to an electronically controlled mechanical timepiece in which the hands are swept, it is possible to further enhance the appearance by eliminating the skipping of the hands when an instruction deviation occurs.

本発明の時計では、前記番車の歯車の径寸法と前記指針車の歯車の径寸法が同じであることが望ましい。
ここで、『歯車の径寸法』とは、歯車の基礎円直径、歯先円直径、および歯底円直径の各寸法の総称である。
このような時計では、番車の回転は、中間車を介してそのままの回転数で指針車に伝達されるので、本発明は、例えば、番車および指針車の一方に秒針を取り付け、他方に秒ＣＧ針を取り付けるなど、同じ回転速度で運針させる指針が一対必要な時計に好適である。 In the timepiece of the present invention, it is preferable that the diameter of the gear of the number wheel and the diameter of the gear of the pointer wheel are the same.
Here, the “diameter dimension of the gear” is a general term for each dimension of the basic circle diameter, the tip circle diameter, and the root circle diameter of the gear.
In such a timepiece, the rotation of the number wheel is transmitted to the pointer wheel at the same rotation speed via the intermediate wheel. Therefore, the present invention attaches a second hand to one of the number wheel and the pointer wheel, for example, It is suitable for a timepiece that requires a pair of hands that move at the same rotational speed, such as attaching a second CG hand.

本発明の時計では、前記中間かなは、前記主輪列を構成する別の番車と同軸上に配置されていることが望ましい。
このような時計では、中間かなを設けるためだけの平面的なスペースを省略できるため、時計の小径化を促進できる。 In the timepiece of the present invention, it is preferable that the intermediate pinion is arranged coaxially with another number wheel constituting the main wheel train.
In such a timepiece, a planar space only for providing an intermediate pinion can be omitted, so that the diameter of the timepiece can be reduced.

本発明の時計では、前記別の番車の軸部には、当該番車を受ける輪列受と前記中間かなとの間にあがき決め部材が設けられていることが好ましい。
このような時計では、軸部の長さが長い場合でも、中間かなのあがき量をあがき決め部材で適正に維持できる。 In the timepiece according to the present invention, it is preferable that the shaft portion of the other wheel is provided with a slashing member between the train wheel bridge receiving the wheel and the intermediate pinion.
In such a timepiece, even when the length of the shaft portion is long, the amount of intermediate kana can be appropriately maintained by the hoisting determination member.

本発明の時計によれば、指針車への回転を中間かなを介して減速して伝達するため、無負荷状態で駆動される指針車のふらつきを抑制して指針による指示ずれを防止できるという効果がある。   According to the timepiece of the present invention, since the rotation to the pointer wheel is decelerated and transmitted via the intermediate pinion, it is possible to suppress the deviation of the indication by the pointer by suppressing the fluctuation of the pointer wheel driven in the no-load state. There is.

〔第１実施形態〕
以下、本発明の第１実施形態を図面に基づいて説明する。
図１〜図３はそれぞれ、本実施形態に係る時計の外観図、輪列構成図、および要部の断面図である。なお、図５で示した同一構成部材には同じ符号を付与し、ここでの説明を省略または簡略化する。 [First Embodiment]
DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, a first embodiment of the invention will be described with reference to the drawings.
1 to 3 are an external view of a timepiece according to the present embodiment, a train wheel configuration diagram, and a cross-sectional view of a main part. In addition, the same code | symbol is provided to the same structural member shown in FIG. 5, and description here is abbreviate | omitted or simplified.

図１〜図３において、本実施形態の時計は、ぜんまい１Ａを駆動源とした機械時計または電子制御式機械時計であり、文字板１２の中心位置に分針１３および時針１４の他、秒ＣＧ針１５を備えたクロノグラフを搭載している。四番車４以降には、図示しない五番車や六番車等が設けられてトルク伝達経路が形成され、このトルク伝達経路となる主輪列５により、機械式時計であれば調速機が駆動され、電子制御式機械時計では発電機が駆動される。文字板１２の６時部分には、秒時間を表示する表示部１６が設けられており、文字板１２の中心からずれた位置にある指針としての秒針１０は、この表示部１６の中心で運針する。   1 to 3, the timepiece of the present embodiment is a mechanical timepiece or an electronically controlled mechanical timepiece using the mainspring 1 </ b> A as a drive source. In addition to the minute hand 13 and the hour hand 14, the second CG hand is located at the center position of the dial 12. A chronograph with 15 is mounted. After the fourth wheel 4 is provided a fifth wheel or sixth wheel (not shown) to form a torque transmission path, and the main wheel train 5 serving as the torque transmission path causes a governor if it is a mechanical timepiece. Is driven, and the generator is driven in the electronically controlled mechanical timepiece. A display portion 16 for displaying the second time is provided at the 6 o'clock portion of the dial 12, and the second hand 10 as a pointer located at a position shifted from the center of the dial 12 is moved at the center of the display portion 16. To do.

クロノグラフにおいて、秒ＣＧ針１５の発停および帰零は、外部操作ボタン１７によって行われるが、その具体的な構造は、よく知られた通常のクロノグラフと同じであるため、図２、図３に帰零構造を構成する復針レバー９３の一部を図示するにとどめ、ここでの詳細な説明は省略する。以下には、本実施形態の最も特徴的な構成について、図２、図３に基づいて詳説する。   In the chronograph, the start and stop of the second CG hand 15 and the zero return are performed by the external operation button 17, but the specific structure thereof is the same as a well-known normal chronograph. 3 shows only a part of the hammer 93 that constitutes the zero return structure, and a detailed description thereof is omitted here. Hereinafter, the most characteristic configuration of the present embodiment will be described in detail with reference to FIGS.

図２および図３において、三番車３は、二番車２で駆動されるかな３Ａが地板１８側に設けられ、かな３Ａとは二番受１９を挟むように離間した位置に歯車３Ｂが設けられている。歯車３Ｂにより駆動されてハートカム軸９１を中心として回転する四番車４では、その歯車４Ｂが図示しない五番車と噛み合っているとともに、歯車４Ｂよりも小さい径寸法の中間かな２０にも噛み合っている。なお、本実施形態では、中間かな２０および後述の秒車１１により本発明に係る副輪列６が構成され、この副輪列６が主輪列５と連結されて無負荷状態で駆動される。   2 and 3, the third wheel 3 is provided with a pinion 3A on the side of the main plate 18 that is driven by the pinion 2, and the gear 3B is spaced from the pinion 3A so that the pinion 19 is sandwiched between them. Is provided. In the fourth wheel 4 driven by the gear 3B and rotating around the heart cam shaft 91, the gear 4B meshes with a fifth wheel (not shown) and also meshes with an intermediate pinion 20 having a smaller diameter than the gear 4B. Yes. In the present embodiment, the intermediate kana 20 and the second wheel 11 described later constitute the auxiliary wheel train 6 according to the present invention, and the auxiliary wheel train 6 is connected to the main wheel train 5 and driven in a no-load state. .

中間かな２０は、本実施形態では三番車３の軸部３Ｃを中心として回転可能に設けられている。ただし、三番車３とは別な位置に中間かな２０を配置してもよく、中間かな２０の配置位置は、これと噛み合う秒車１１の位置、すなわち図１に示す表示部１６をどの位置に設けるか等を勘案して決められてよい。また、軸部３Ｃには、中間かな２０および四番受２１との間に位置するように筒状のあがき決め部材２２が挿通されている。このあがき部材２２により、中間かな２０のあがき量が適正に維持される。   In the present embodiment, the intermediate pinion 20 is provided so as to be rotatable about the shaft portion 3C of the third wheel & pinion 3. However, the intermediate pinion 20 may be arranged at a position different from the third wheel 3, and the arrangement position of the intermediate pinion 20 is the position of the second wheel 11 that meshes with this, that is, the position of the display unit 16 shown in FIG. It may be determined in consideration of whether it is provided in Further, a cylindrical awning determining member 22 is inserted through the shaft portion 3 </ b> C so as to be positioned between the intermediate pinion 20 and the fourth support 21. With this awning member 22, the amount of awning of the intermediate kana 20 is properly maintained.

一方、秒針１０が取り付けられた指示車としての秒車１１は、中間かな２０と噛み合う歯車１１Ｂを備えており、地板１８と輪列受２３との間で支持されている。歯車１１Ｂの径寸法は中間かな２０よりも大きく、具体的には四番車４の歯車４Ｂと同じである。従って、中間かな２０の回転は減速されて秒車１１へ伝達される。このため、四番車４の回転は一旦、中間かな２０で増速されるが、秒車１１にて減速されることで四番車４と同じになり、秒車１１が秒針１０を所定の速度で運針させることになる。   On the other hand, a second wheel 11 as an indicating wheel to which the second hand 10 is attached includes a gear 11B that meshes with the intermediate pinion 20 and is supported between the main plate 18 and the train wheel bridge 23. The diameter of the gear 11 </ b> B is larger than the intermediate pinion 20, specifically, the same as the gear 4 </ b> B of the fourth wheel 4. Accordingly, the rotation of the intermediate kana 20 is decelerated and transmitted to the second wheel 11. For this reason, the rotation of the fourth wheel 4 is temporarily increased at the intermediate pinion 20, but is decelerated by the second wheel 11 to become the same as the fourth wheel 4, and the second wheel 11 sets the second hand 10 to a predetermined value. You will be moving at speed.

このような本実施形態によれば、四番車４の回転が小径の中間かな２０を介し、秒車１１に減速して伝達されるから、復針レバー９３によるハートカム９２の押圧時にハートカム軸９１が撓んでも、この撓みによって生じた四番車４の余分な回転は、中間かな２０によって増速されることはない。従って、秒車１１で回転角度が増大されることがないため、秒針１０にて目立った指示ずれが生じる心配がない。   According to this embodiment, the rotation of the fourth wheel 4 is transmitted to the second wheel 11 while being decelerated via the small intermediate pin 20, so that the heart cam shaft 91 is pressed when the heart cam 92 is pressed by the hammer 93. However, the excessive rotation of the fourth wheel 4 caused by the bending is not accelerated by the intermediate pinion 20. Therefore, since the rotation angle is not increased by the second wheel 11, there is no fear that a noticeable deviation of the indication occurs at the second hand 10.

また、秒車１１の歯車１１Ｂと中間かな２０との噛み合い部分で生じるバックラッシュ量は従来と変わらないが、歯車１１Ｂの径寸法が大きい分だけ秒車１１の中心側での回転量はより小さくなり、バックラッシュによる秒針１０のふらつきが目立たなくなるので、従来のような抑制ばね９０（図５）を用いてバックラッシュを詰める必要がない。従って、抑制ばね９０を不要にして部品点数の低減や時計の小型化を実現できるうえ、抑制ばね９０の組付時の位置調整等も不要にできる。   Further, the backlash amount generated at the meshing portion of the second wheel 11 with the gear 11B and the intermediate pinion 20 is not different from the conventional one, but the rotation amount on the center side of the second wheel 11 is smaller by the amount of the larger diameter of the gear 11B. Thus, since the wobbling of the second hand 10 due to backlash becomes inconspicuous, it is not necessary to pack backlash using the conventional restraining spring 90 (FIG. 5). Therefore, it is possible to reduce the number of parts and reduce the size of the timepiece by eliminating the need for the restraining spring 90, and it is also possible to eliminate the need for position adjustment when the restraining spring 90 is assembled.

〔第２実施形態〕
図４に示す第２実施形態の時計は、クロノグラフを搭載しておらず、秒針１０が単に時計の中心からずれて配置されている。従って、本実施形態では、第１実施形態で設けられていたハートカム９２や復針レバー９３は設けられていない。また、三番車３および四番車４は、秒車１１と同様に地板１８と輪列受２３との間で支持されている。このような本実施形態でも、衝撃等で四番車４の軸部４Ｃが撓んでも、その影響を秒車１１に及ぼし難くでき、また、バックラッシュの影響も小さくできるので、第１実施形態と同じ効果を得ることができる。 [Second Embodiment]
The timepiece of the second embodiment shown in FIG. 4 is not equipped with a chronograph, and the second hand 10 is simply displaced from the center of the timepiece. Therefore, in this embodiment, the heart cam 92 and the hammer lever 93 provided in the first embodiment are not provided. The third wheel 3 and the fourth wheel 4 are supported between the main plate 18 and the train wheel bridge 23 in the same manner as the second wheel 11. In this embodiment as well, even if the shaft portion 4C of the fourth wheel 4 is bent due to an impact or the like, the influence can be hardly exerted on the second wheel 11 and the influence of backlash can be reduced, so the first embodiment The same effect can be obtained.

なお、本発明は前述の各実施形態に限定されるものではなく、本発明の目的を達成できる範囲での変形、改良等は本発明に含まれるものである。
例えば、前記各実施形態では、バックラッシュによるふらつきをも目立たなくできるために、従来の抑制ばね９０が設けられていなかったが、バックラッシュの影響をより一層少なくするためには、そのような抑制ばね９０を設けてもよく、そのような場合でも本発明に含まれる。すなわち本発明は、ハートカム軸９１や四番車４の軸部４Ｃの撓み等による指示ずれを防止できればよく、抑制ばね９０の省略を目的とはしていないからである。 The present invention is not limited to the above-described embodiments, and modifications, improvements, and the like within the scope that can achieve the object of the present invention are included in the present invention.
For example, in the above-described embodiments, the conventional restraining spring 90 is not provided because the fluctuation due to the backlash can be made inconspicuous. However, in order to further reduce the influence of the backlash, such a restraint is not provided. The spring 90 may be provided, and such a case is included in the present invention. That is, the present invention is only required to prevent misalignment of the heart cam shaft 91 and the shaft portion 4C of the fourth wheel 4 and the like, and is not intended to omit the suppression spring 90.

本発明の第１実施形態に係る時計を示す外観図。1 is an external view showing a timepiece according to a first embodiment of the present invention. 前記時計の輪列構成の一部を示す正面図。The front view which shows a part of wheel train structure of the said timepiece. 前記時計の要部を示す断面図。Sectional drawing which shows the principal part of the said timepiece. 本発明の第２実施形態に係る時計を示す断面図。Sectional drawing which shows the timepiece which concerns on 2nd Embodiment of this invention. 背景技術を説明するための断面図。Sectional drawing for demonstrating background art.

符号の説明Explanation of symbols

１Ａ…ぜんまい、３…番車である三番車、４…番車である四番車、５…主輪列、６…副輪列、１０…指針である指針、１１…指針車である秒車、２０…中間かな、２２…あがき決め部材。   1A ... mainspring, 3 ... third wheel as the number 4 wheel, 4th wheel as the number # 5, 5 ... main wheel train, 6 ... sub wheel train, 10 ... pointer as a pointer, 11 ... second as a pointer wheel Car, 20 ... Middle, 22 ... Architecting member.

Claims (3)

ぜんまいからのトルクの伝達経路を形成する主輪列と、
この主輪列に連結されて回転する副輪列とを備え、
前記副輪列は、指針が取り付けられた指針車と、前記主輪列を構成する番車の歯車および前記指針車の歯車の両方に噛み合う中間かなとを含んで構成され、前記中間かなは、前記主輪列を構成する別の番車と同軸上に配置され、
前記中間かなの回転は前記指針車へ減速して伝達されることを特徴とする時計。 A main train wheel forming a torque transmission path from the mainspring;
A secondary train wheel connected to the main train wheel and rotating,
The auxiliary wheel train includes a pointer wheel to which a pointer is attached, and an intermediate pinion that meshes with both the gear of the number wheel constituting the main wheel row and the gear of the pointer wheel . It is arranged coaxially with another number wheel constituting the main train wheel,
A timepiece in which the rotation of the intermediate pinion is decelerated and transmitted to the pointer wheel. 請求項１に記載の時計において、
前記番車の歯車の径寸法と前記指針車の歯車の径寸法が同じであることを特徴とする時計。 The timepiece according to claim 1,
A timepiece in which the radial dimension of the gear of the number wheel and the radial dimension of the gear of the pointer wheel are the same. 請求項１および2のいずれかに記載の時計において、
前記別の番車の軸部には、当該番車を受ける輪列受と前記中間かなとの間にあがき決め部材が設けられていることを特徴とする時計。 The timepiece according to any one of claims 1 and 2,
A timepiece characterized in that the shaft portion of the other wheel is provided with a slashing member between a train wheel bridge for receiving the wheel and the intermediate pinion.
JP2007080868A 2007-03-27 2007-03-27 clock Active JP4985021B2 (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2511970B2 (en) * 1987-05-29 1996-07-03 シチズン時計株式会社 Wheel train structure of a watch with a small second hand
JPH0291986U (en) * 1989-01-07 1990-07-20
JP2002107472A (en) * 2001-08-17 2002-04-10 Seiko Instruments Inc Chronograph clock having operation lever regulating member
JP4296019B2 (en) * 2003-03-27 2009-07-15 セイコーインスツル株式会社 Chronograph watch with nulling structure

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