WO2004020854A1

WO2004020854A1 - Ball bearing and self-winding watch

Info

Publication number: WO2004020854A1
Application number: PCT/JP2003/010947
Authority: WO
Inventors: Morinobu Endo; Tetsuo Uchiyama; Akio Yamaguchi; Yasuo Kondo; Hiroshi Aoyama; Koichiro Jujo; Kazutoshi Takeda; Masato Takenaka; Shigeo Suzuki; Takeshi Tokoro
Original assignee: Seiko Instruments Inc.; Kitagawa Industries Co., Ltd.
Priority date: 2002-08-29
Filing date: 2003-08-28
Publication date: 2004-03-11
Also published as: CN1692234A; JP4331110B2; CN100362252C; JPWO2004020854A1; CH696705A5

Abstract

A ball bearing including balls and retainers, and a self-winding watch with the ball bearing. The ball bearing has as a constitution element the retainers formed of a resin with fillers. The self-winding watch has as a constitution element the ball bearing having the retainers formed of the resin with fillers.

Description

Description Ball bearing and self-winding watch Technical field

The present invention relates to a pole bearing including an outer wheel, an inner wheel, a plurality of poles, and a retainer. The present invention also relates to a self-winding timepiece provided with a rotating weight and a ball bearing. Background art

The structure of a conventional self-winding timepiece is disclosed in, for example, Japanese Patent Application Laid-Open No. 11-186365. In this self-winding timepiece, the movement includes an automatic winding mechanism including a pole bearing, a rotating weight fixed to the pole bearing, and a rotating weight fixed to the rotating weight. Here, “movement” refers to the mechanical part of the timepiece including the driving part. In the movement, the “glass side”, “dial side”, and “back side” refer to the side with the glass relative to the main plate when the movement is assembled in the case, that is, the side with the dial. Show the side. On the other hand, in the movement, “front side” and “back cover side” indicate the side of the main plate with the back cover when the movement is assembled in the case. The front wheel train including the barrel car, the second wheel, the third wheel, the fourth wheel, etc., the square hole wheel, the first and second wheels, the escapement mechanism, the speed control mechanism, the automatic winding mechanism, etc. It is located on the “front side”, that is, on the “back lid side”. The back train wheel, calendar mechanism, etc. are arranged on the “back side” of the main plate.

In a self-winding timepiece, when the oscillating weight rotates, the oscillating weight Kana provided integrally with the oscillating weight rotates. The wheel is most rotated by the rotation of the rotating weight pinion. Due to the rotation of the first transmission wheel, the pawl lever reciprocates based on the eccentric movement of the eccentric shaft of the first transmission wheel. The second transmission wheel has a ratchet gear. The pawl lever is provided with a pawl and a pull pawl. The pawls and pawls engage the ratchet gear of the second wheel. The second transmission wheel is rotated in a certain direction by the reciprocating movement of the push and pull. Let With the rotation of the second wheel, the square wheel rotates and winds up the mainspring in the barrel box.

Referring to FIGS. 6 to 8, in the movement of the self-winding timepiece, the ball bearing or pole bearing 962 of the rotating weight is composed of an inner ring 968, a holding ring 970, and an outer ring or outer ring 972. And Pressing ring 970 is fixed to inner ring 968. Therefore, the inner ring 968 and the presser ring 970 constitute an inner ring. The five poles 974 are formed by a slope portion of the inner ring 9688, that is, a first inner guide portion and a slope portion of the presser ring 970, that is, a second inner guide portion, and two slope portions of the outer ring 972, that is, It is incorporated between the outer guide. A rotating weight pinion 972b is provided on the outer periphery of the outer ring 972. A retainer 976 is incorporated between the inner ring 968 and the presser ring 9770 to arrange the plurality of balls 974 at intervals. The retainer 976 uses a metal plate such as stainless steel, and presses the metal plate to form an outer shape. The retainer 976 is provided with five ball positioning portions 976 g having a semicircular shape for positioning the pole 9774. Lubricating oil is lubricated around each pole 9 7 4.

The ball bearing used for the movement of the conventional self-winding watch has a structure including an outer ring, an inner ring (including a retaining ring fixed to the inner ring), a plurality of balls, and a retainer. The state of contact (sliding) between these components is divided into “rolling contact” and “sliding contact”. That is, the contact between the outer ring and the ball is "rolling contact". The contact between the inner ring (and the holding ring) and the ball is also “rolling contact”. The contact between the retainer and the ball is "sliding contact." Comparing “rolling contact” with “sliding contact”, it is generally known that “sliding contact” has lower wear resistance than “rolling contact”. Therefore, in conventional pole bearings, the life of ball bearings is often determined by the progress of wear of the retainer. When lubricating oil was lubricated to the pole to reduce such wear of the retainer, the following problems occurred.

First, lubricating oil could be scattered by vibrations and impacts when using ball bearings. As a result, lubricating oil adheres to places where lubricating oil is not required, There is a possibility that the performance of various components may be deteriorated. For example, if the lubricating oil adheres to the gear tooth surface, the viscous loss in the wheel train mechanism may increase. Also, if the lubricating oil adheres to the hairspring, the accuracy of the watch may be lost.

Second, the viscosity of the lubricating oil changes due to changes in temperature, which may cause various properties to deteriorate. For example, in a low-temperature state, the viscosity of the lubricating oil increases, so that the starting torque may increase or the responsiveness may decrease. Also, at high temperatures, the viscosity of the lubricating oil decreased, and the allowable load decreased, and oil flow could occur.

Third, due to the oxidation of the lubricating oil and the evaporation of the lubricating oil, the amount of lubricating oil injected may be reduced, and the lubricating performance may be reduced. As a result, the wear of parts may increase, or wear powder may be generated and scattered, and the performance of the timepiece may decrease.

Fourth, due to wear of the retainer, abrasion powder is contained in the lubricating oil, and the viscosity of the lubricating oil increases, which may increase the starting torque and decrease the responsiveness. Fifth, the lubricating portion such as a ball has a large area that can be seen from outside the pole bearing, and the amount of lubricating oil evaporated increases, causing volatile components to cause 鐯 in nearby parts and induce other chemical reactions. And so on. Also, since dust and the like from the outside easily enter into the pole bearing such as the pole guide surface, the life of the pole bearing may be shortened as a result. Disclosure of the invention

A pole bearing according to the present invention includes an outer wheel, an inner wheel, a plurality of poles, and a retainer for positioning the plurality of poles, and the outer wheel includes an outer guide portion for guiding the plurality of poles. The inner wheel has an inner guide portion for guiding the plurality of poles, and the plurality of pawls are arranged between the outer guide portion and the inner guide portion. In the pole bearing of the present invention, the retainer is characterized in that the base resin is a thermoplastic resin, and the resin is formed of a resin containing the base resin and a carbon filler.

In the pole bearing of the present invention, even when lubricating oil is not injected into the ball, Since the possibility of wear of the retainer can be reduced, the performance of the pole bearing can be maintained for a long time, and the bearing characteristics such as starting torque and responsiveness can be less affected by the operating temperature environment. Further, in the ball bearing of the present invention, when lubricating oil is injected into the pole, a structure that can withstand a heavier load can be realized. Therefore, when the pole bearing of the present invention is applied to a self-winding watch, the life of the self-winding watch can be extended. Further, the ball bearing of the present invention is used as a bearing for a time measuring / measuring device, a photographing / recording / recording device, a printing device, a machine / machining / assembling machine, a transporting / transporting / dispensing machine, and the like. Can be widely applied.

In the pole bearing of the present invention, the base resin is composed of polystyrene, polyethylene terephthalate, polycarbonate, polyacetal (polyoxymethylene), polyamide, modified polyphenylene ether, polybutylene terephthalate, polyphenylene sulfide, polyether ether ketone, and polyetherimide. Preferably it is selected from the group consisting of

In the pole bearing of the present invention, the carbon filler includes a single-walled carbon nanotube, a multi-walled carbon nanotube, a vapor-grown carbon fiber, a nanofiber, a carbon nanohorn, a cup-stacked carbon nanotube, a single-walled fullerene, a multi-walled fullerene, And, it is preferable to be selected from the group consisting of a contaminant obtained by doping boron (boron) into one of the carbon filters. In the pole bearing of the present invention, it is preferable that the inner ring includes an inner ring and an inner pressing ring, and the inner guide portion is formed on the inner ring and the inner pressing ring. Alternatively, in the pole bearing of the present invention, the outer ring may include an outer ring and an outer holding ring, and the outer guide portion may be formed as the outer ring and the outer holding ring. With this configuration, the inner wheel and the outer wheel can be easily formed, and a plurality of poles can be easily installed between the inner wheel and the outer wheel. Further, with this configuration, a plurality of balls can be positioned at intervals by using a retainer.

Further, in the ball bearing of the present invention, the retainer is formed in a cylindrical shape, and a guide hole or a guide window for guiding a plurality of balls with an interval is formed in the retainer. Preferably. With this configuration, the retainer can reliably position the plurality of balls at intervals.

Further, in the ball bearing of the present invention, an inner flange portion extending inward in the radial direction is formed on the retainer, and an inner portion of the inner flange portion is disposed between the inner ring and the inner presser ring. Can also be configured. With this configuration, the retainer can be reliably supported between the inner ring and the inner holding ring.

Further, in the pole bearing of the present invention, an outer flange portion extending radially outward is formed on the retainer, and an outer portion of the outer flange portion is disposed between the outer ring and the outer holding ring. May be configured. With this configuration, the retainer can be reliably supported between the outer ring and the outer holding ring.

Furthermore, in the pole bearing of the present invention, the retainer is configured to include an upper retainer portion formed in a cylindrical shape and a lower retainer portion formed in a cylindrical shape, and the upper retainer portion and the lower retainer portion are formed. Guide windows for guiding a plurality of balls at intervals may be formed in the upper retainer portion and the lower retainer portion so as to be detachable. With this configuration, a plurality of pawls can be arranged between the inner guide portion and the inner side of the outer casing, and thereafter, the upper retainer portion and the lower retainer portion can be incorporated.

Further, the present invention provides a self-winding timepiece, wherein a rotating weight including a rotating weight, a pole bearing having the above-described configuration for rotatably supporting the rotating weight, and a rotating weight for winding up the mainspring are provided. It is characterized by having an automatic winding mechanism that operates. With this configuration, the life of the self-winding watch can be extended. BRIEF DESCRIPTION OF THE FIGURES

FIG. 1 is a plan view showing a schematic shape of a movement as viewed from the front side with a self-winding mechanism removed in a first embodiment of the self-winding watch of the present invention. Is omitted).

FIG. 2 is a plan view showing a schematic configuration of the automatic winding mechanism in the first embodiment of the automatic winding timepiece of the present invention (in FIG. 1, some parts are omitted). FIG. 3 is a partial cross-sectional view showing a front train wheel mechanism in the first embodiment of the self-winding timepiece of the present invention.

FIG. 4 is a partial cross-sectional view showing the escape mechanism and the speed control mechanism in the first embodiment of the self-winding timepiece of the present invention.

FIG. 5 is a partial cross-sectional view showing a self-winding mechanism in the first embodiment of the self-winding timepiece of the present invention.

FIG. 6 is a perspective view showing a ball bearing in a partial cross section in a conventional self-winding timepiece.

FIG. 7 is a perspective view showing a ball bearing in a partial cross section in a conventional self-winding timepiece.

FIG. 8 is a perspective view showing a retainer and a ball in a conventional self-winding timepiece.

FIG. 9 is a perspective view showing a pole bearing in a partial cross section in the first embodiment of the self-winding timepiece of the present invention.

FIG. 10 is a perspective view showing a pole bearing in a partial cross section in the first embodiment of the self-winding timepiece of the present invention.

FIG. 11 is a perspective view showing a retainer and a pole in the first embodiment of the self-winding timepiece of the present invention.

FIG. 12 is a perspective view showing a pole bearing in a partial cross section in the second embodiment of the self-winding timepiece of the present invention.

FIG. 13 is a perspective view showing a pole bearing in a partial cross section in the second embodiment of the self-winding timepiece of the present invention.

FIG. 14 is a perspective view showing a retainer and a pole in the second embodiment of the self-winding timepiece of the present invention.

FIG. 15 is a perspective view showing a pole bearing in a partial cross section in the third embodiment of the self-winding timepiece of the present invention.

FIG. 16 is a perspective view showing a pole bearing in a partial cross section in the third embodiment of the self-winding timepiece of the present invention. FIG. 17 is a perspective view showing a retainer and a pole in a third embodiment of the self-winding timepiece of the present invention.

FIG. 18 is a perspective view showing a partial cross section of a ball bearing in a fourth embodiment of the self-winding timepiece of the present invention.

FIG. 19 is a perspective view showing a ball bearing in a partial cross section in the fifth embodiment of the self-winding timepiece of the present invention.

FIG. 20 is a perspective view showing a partial cross section of a ball bearing in a fifth embodiment of the self-winding timepiece of the present invention. BEST MODE FOR CARRYING OUT THE INVENTION

Hereinafter, embodiments of a self-winding timepiece and a pole bearing of the present invention will be described with reference to the drawings.

(1) Configuration of the first embodiment

Hereinafter, the configuration of the first embodiment of the self-winding timepiece (including the pole bearing of the present invention) of the present invention will be described.

Referring to FIGS. 1 to 5, in the self-winding timepiece of the present invention, the movement 100 of the self-winding timepiece includes a main plate 102, a first receiving part 105, a second receiving part 106, The balance includes a balance receiving pad 108 and an ankle receiving bowl 109. The first receiving part 105, the second receiving part 106, and the balance receiving part 108 are incorporated into the back cover side of the main plate 102. The second receiver 106 is disposed between the first receiver 105 and the main plate 102. The winding stem 110 is incorporated into the main plate 102. The dial 104 (shown in phantom lines in FIGS. 3 to 5) is attached to the ground plane 102 via the dial receiving ring 103.

The switching device including the shim 140, the bail 144, and the shim holder 144 is configured to determine the axial position of the winding stem 110. Square hole wheel 1 18 is installed on the back cover side of the guard 105. The square hole 1 1 8a of the square wheel 1 1 8 is incorporated into the corner 1 2 0b of the barrel 1 1 2 0a of the barrel wheel 1 2 0. Square hole screw 1 1 9 fixes square hole wheel 1 1 8 to barrel box 1 2 0 a. A plate-shaped hammer 117 for regulating the rotation of the ratchet wheel 118 is provided so as to engage with the teeth of the ratchet wheel 118. At all Mai 1 2 2 is stored in barrel box 1 2 0.

By rotating the square wheel 1 18, the mainspring 1 2 2 housed in the barrel box 120 is wound up. The second wheel & pinion 124 is configured to rotate by the rotation of the barrel wheel 120. The escape wheel 1 3 4 power is configured to rotate through the rotation of the fourth wheel 1 2 8, the third wheel 1 2 6, and the second wheel 1 2 4. Barrel car 1 2 0, second car

1 2 4, 3rd wheel 1 2 6 and 4th wheel 1 2 8 constitute the front train wheel. The barrel car 120, the escape wheel 1 34, and the third wheel 1 26 are assembled so as to be rotatable with respect to the first support 105 and the main plate 102. The second wheel 1 2 4 is installed rotatably with respect to the second wheel bridge 106 and the main plate 102. The fourth wheel 1 288 is installed so as to be rotatable with respect to the first wheel 105 and the second wheel 106.

Escape control for controlling the rotation of the front train wheel

1 3 4 and ankle 1 3 8 are included. The pallet fork 13 is rotatably mounted with respect to the pallet holder 109 and the main plate 102. The balance 1 360 is rotatably incorporated with the balance 1 108 and the main plate 102. The balance 13 includes a balance 13a, a balance wheel 13b, and a hairspring 13c. Based on the rotation of the second wheel & pinion 124, the cylindrical pinion 150 is configured to rotate simultaneously. The minute hand 152 attached to the barrel pinion 150 is configured to display “minute”. The cylinder pinion 150 is provided with a slip mechanism for the second wheel 124. The second wheel 1 2 4 is configured to rotate once an hour by the rotation of the barrel wheel 120. Based on the rotation of the hour pinion 150, the hour wheel 154 is configured to rotate once every 12 hours via the rotation of the minute wheel 144. The hour hand 156 attached to the hour wheel 154 is configured to display "hour".

The hairspring 1 3 6 c is a thin leaf spring having a spiral shape with a plurality of turns. The inner end of the hairspring 1 3 6 c is fixed to the beard ball 1 36 d fixed to the balance 13 6 a, and the outer end of the hairspring 1 3 6 c is the balance 10 8 It is fixed by screwing through the beard holder 1 36 g attached to the beard holder 1 36 f fixed to. The speed-reducing needle 1 36 h is rotatably attached to the balance with hairspring 108. The beard holder 1 3 6 j and the beard bar 1 3 6 k are attached to the needle 1 36 h I have. The portion near the outer end of the hairspring 1336c is located between the whiskers 1336j and the whiskers 1366k.

The fourth wheel & pinion 128 is configured to rotate once per minute by the rotation of the second wheel & pinion 124 via the tillage of the third wheel & pinion 126. The second hand 1 30 is attached to the fourth wheel 1 2 8.

The date wheel retainer 157 is mounted on the glass side of the main plate 102. The dial 104 is mounted on the glass side of the date wheel holder 157. The date wheel 158 is rotatably supported by the main plate 102 and the date wheel holder 157. Day indicator 159 is placed between dial 104 and date wheel holder 157. The day wheel 159 is configured to be rotatable with respect to the hour wheel 154. The date wheel 158 is configured to rotate via a date feed mechanism (not shown) by the rotation of the hour wheel 154. The day wheel 159 is configured to rotate via a day feed mechanism (not shown) by the rotation of the hour wheel 154.

Referring to FIG. 2 and FIG. 5, the oscillating weight 160 includes a pole bearing 162, a oscillating weight body 164, and a oscillating weight 166. The pole bearing 162 includes an inner ring 1668, an inner presser ring 170, an outer ring 172, and a plurality of balls 174. A rotating weight pinion 1 7 8 is provided on the outer ring 17 2. An inner ring internal thread 1 668 j is provided in the center hole of the inner ring 1 668. A pole bearing set screw 105 j is provided on the guard 105. The center axis of the pole bearing set screw 105 j is the same as the center axis of the fourth wheel & pinion 128 (center axis of the second wheel & pinion 124, center axis of the hour wheel & pinion 1504) Is done. By tightening the inner ring female screw 168 j to the pole bearing set screw 105 j, the pole bearing 162 is fixed to the first bearing 105.

The first transmission car 182 is rotatably mounted on the guard 105 and the main plate 102. The first transmission wheel 182 has a first transmission gear 182a, an upper guide shaft portion 182b, a lower guide shaft portion 182c, and an eccentric shaft portion 182d. The first transmission gear 18 22 a is located between the rotary weight 16 4 and the first bearing 105. The first transmission gear 1 8 2 a is configured to engage with the rotary weight pinion 1 7 8. The eccentric shaft 18 2 d is provided on the first transmission wheel 18 2 between the first transmission gear 18 2 a and the upper guide shaft 18 2 b. . The center axis of the eccentric shaft 18 d is configured to be eccentric from the center axis of the first transmission gear 18 a. The upper guide shaft portion 18 2 b is rotatably supported with respect to the first support 105. The lower guide shaft portion 18 2 c is rotatably supported with respect to the main plate 102, and the pawl lever 180 is installed between the first transmission gear 18 2 a and the first support 105. It is. The pawl lever 180 is partially located between the first transmission gear 1802a and the first receiving gear 105. The other part of the pawl lever 180 is located between the oscillating weight body 164 and the first receiver 105. The pawl lever 180 has a pawl 180c and a pawl 180d. The guide hole 180a of the pawl lever 180 is rotatably incorporated into the eccentric shaft portion 182d. The second transmission wheel 1 84 is supported rotatably with respect to the first receiver 105. The second transmission wheel 18 4 has a second transmission gear 18 4 a and a second transmission pin 18 4 b. The second transmission gear 1 8 4 a is configured in the form of a ratchet gear. The second transmission gear 1 84 a is located between the oscillating weight 16 4 and the first support 105, and the pawl lever 180 c pulls 180 c and pushes 180 d. Engages with the second transmission gear 1884a. The second story kana 1 8 4 b mates with the square hole wheel 1 18. The puller 180c and the presser 180d are elastically urged toward the center of the second transmission gear 1804a, and the puller 180c and the presser 180d It is configured to be prevented from leaving the transmission gear 1 8 4 a.

When the oscillating weight 160 rotates, the oscillating weight pin 178 is also configured to rotate at the same time. The first transmission wheel 18 2 is configured to rotate by the rotation of the rotating pin 17 8. The pawl lever 180 reciprocates based on the eccentric motion of the eccentric shaft portion 18d by the rotation of the first transmission wheel 182, and is reciprocated by the puller 180c and the pusher 180d. It is configured to rotate the number wheel 18 4 in a certain direction. Second transmission The rotation of the car 18 4 rotates the square hole wheel 1 18 to wind up the mainspring 1 2 2 in the barrel box 120.

Referring to FIGS. 9 to 11, the pole bearing 162 includes an inner ring 168, an inner presser ring 170, an outer ring 172, and a plurality of poles 174. For example, five The ball 174 is disposed between the inner ring 168 and the inner holding ring 170 and the outer ring 172. The inner holding ring 170 is fixed to the inner ring 168. The inner ring 168 and the inner presser ring 170 form an inner ring. An inner ring female screw 1 6.8 j is provided in the center hole of the inner ring 168. An inner ring driver groove 168 g is provided above the inner ring 168. The outer ring 17 2 constitutes the outer ring. A rotating weight pin 1 7 8 is provided on the outer ring 1 7 2. The inner ring 168 has a first inner guide portion 168b for guiding the balls 174. The inner presser ring 170 has a second inner guide portion 170c for guiding the plurality of balls 170. The outer race 17 2 has a first outer guide portion 17 2 b and a second outer guide portion 17 2 c for guiding the plurality of poles 17 4. The five balls 1 74 include a first inner guide 1 168 b and a second inner guide 170 c, and a first outer guide 17 2 b and a second outer guide 17 2 c. Are spaced apart from each other.

When cut along a plane that includes the center axis of the rotating weight 160, the first inner guide portion 168b is formed as a conical surface that forms an angle of 45 degrees with the upper surface of the inner ring 168. Good. When cut along a plane that includes the center axis of the rotating weight 160, the second inner guide portion 170c is formed as a conical surface that forms an angle of 45 degrees with the lower surface of the inner ring 168. It is better to be. When cut along a plane that includes the center axis of the rotating weight 160, the first inner plan 1168b forms an angle of 90 degrees with the second inner guide 170c. Good to be. When cut along a plane including the center axis of the rotary spindle 160, the first outer guide portion 172b is formed as a conical surface that forms an angle of 45 degrees with the upper surface of the outer ring 172. Good to be. When cut along a plane including the center axis of the rotary spindle 160, the second outer guide portion 172c is formed as a conical surface that forms an angle of 45 degrees with the lower surface of the outer ring 172. Is good. When cut along a plane including the center axis of the rotary weight 160, the first outer guide portion 172b forms an angle of 90 degrees with the second outer guide portion 172c. It should be done. When cut along a plane including the center axis of the rotating weight 160, the first outer guide portion 172b is formed so as to form an angle of 90 degrees with the first inner guide portion 168b. Is good. When cut along a plane including the center axis of the rotating weight 160, the second outer guide portion 170c is formed to form an angle of 90 degrees with the second inner guide portion 170c. Is good. The retainer 176 is formed in a cylindrical shape. The retainer 176 is provided with five guide holes 176 h for guiding the five balls 174 at intervals (preferably at equal intervals). The shape of the guide hole may be circular as shown, or may be polygonal. As a modification, the retainer 176 may be formed with a guide window for guiding the five poles 174 at intervals (preferably at equal intervals). The shape of the guide window may be semicircular, U-shaped, C-shaped, Ω-shaped, or polygonal. Although the embodiment shown in FIGS. 9 to 11 describes five poles 17 4, in the pole bearing of the present invention, the number of poles may be three or four. Or five or six or more. More preferably, the number of poles is preferably an odd number such as three, five, seven, nine, or eleven. By using the plurality of poles 17 4, the outer ring 17 2 can smoothly rotate with respect to the inner ring 168 and the inner presser wheel 170.

The pole bearing of the present invention can be configured so that lubricating oil is not injected around the pole 174. Further, in the pole bearing of the present invention, lubricating oil may be injected around the pole 174. If lubricating oil is not injected around the poles 174, it is possible to eliminate the risk of lubricating oil scattering due to vibrations and impacts when using the pole bearings. In addition, the viscosity of the lubricating oil changes due to a change in temperature, which can eliminate the risk of causing various properties to deteriorate. When lubricating oil is injected around the ball 1 74, the area where the lubricating part such as a pole can be seen from outside the pole bearing can be reduced, so the amount of evaporation of the lubricating oil decreases and the volatile components It is possible to reduce the risk of 鲭 occurring in nearby parts and inducing other chemical reactions. In addition, since dust from the outside can hardly enter into the pole bearing such as the ball guide surface, the dust is contained in the lubricating oil and the risk of shortening the service life can be reduced. 7 6 uses the base resin as a thermoplastic resin It is formed of a resin containing a filler filled with a carbon filler. For example, the retainer 176 is formed by using a base resin as a thermoplastic resin and subjecting the base resin to injection molding with a filler-filled resin filled with a carbon filler. Therefore, in the self-winding timepiece including the ball bearing of the present invention, since the retainer 176 has good durability performance, maintenance is easy.

The base resin used in the present invention is generally made of polystyrene, polyethylene terephthalate, polycarbonate, polyacetal (polyoxymethylene), polyamide, modified polyphenylene ether, polybutylene terephthalate, polyphenylene sulfide. , Polyetheretherketone, and polyetherimide. That is, in the present invention, the base resin is preferably a so-called general-purpose engineering plastic or a so-called super-engineering plastic. In the present invention, other general-purpose engineering plastics or super-engineering plastics other than those described above can be used as the base resin. The base resin used in the present invention is preferably a thermoplastic resin.

The carbon fiber used in the present invention is generally composed of a single-walled carbon nanotube, a multi-walled carbon nanotube, a vapor-grown carbon fiber, a nanograph eye bar, a carbon nanohorn, and a cup-stacked carbon nanotube. A single-layer fullerene, a multi-layer fullerene, or a contaminant obtained by doping boron in any one of the above carbon fillers.

The carbon filler is preferably contained in an amount of 0.2 to 60% by weight based on the total weight of the resin containing the filler. Alternatively, it is preferable that the carbon fiber is contained in an amount of 0.1% by volume to 30% by volume based on the total volume of the resin containing the filler, and the single-walled carbon nanotube has a diameter of 0.4 ηπ! 22 nm, the aspect ratio (length / diameter) is preferably 10-100, and the aspect ratio is particularly preferably 50-100. The single-walled carbon nanotube is formed in a hexagonal mesh having a cylindrical shape or a truncated cone shape, and has a single-walled structure. Single-layer carbon nano The tube is available from Carbon Nantechnologies Inc. (CNI) in the United States as "S WNT".

The multi-walled carbon nanotube has a diameter of 2 nm to 100 nm, an aspect ratio of preferably 10 to 1,000, and particularly preferably an aspect ratio of 50 to 100. The multi-walled carbon nanotube is formed in a hexagonal mesh having a cylindrical shape or a truncated cone shape, and has a multi-layered structure. Multi-walled carbon nanotubes are available from Nikkiso as “MWNT”.

For such carbon nanotubes, see “Carbon Nanotubes, Rapidly Expanding Electronic Applications” by PG Collins and others (“Nikkei Science” March 2001, pp. 52-62), “The Challenge of Nanomaterials” (“Nikkei Mechanical ”, December 2001, pp. 36-57). Further, the composition and production method of a resin composition containing carbon fibers are disclosed, for example, in Japanese Patent Application Laid-Open No. 2001-200096.

The vapor-grown carbon fiber has a diameter of 50 nm to 200 nm, an aspect ratio of preferably 100 to 1,000, and particularly preferably an aspect ratio of 50 to 100. The vapor-grown carbon fiber is formed in a hexagonal network having a cylindrical shape or a truncated cone shape, and has a multilayer structure. The vapor-grown carbon fiber is available as “VGCFj” from Showa Denko KK. The vapor-grown carbon fiber is disclosed in, for example, JP-A-5-321039, JP-A-7-150419, and Tokuhei 3- It is disclosed in, for example, US Pat.

The nanodalla fiber has an outer diameter of 2 nm to 500 nm, preferably has an aspect ratio of 10 to 1,000, and particularly preferably has an aspect ratio of 50 to 100. The nanograph eyebar has a substantially solid cylindrical shape. The nanofiber is available from Noritake Ise Electronics Co., Ltd.

The power bon nanohorn has a diameter of 2 ηπ! 500500 nm, the aspect ratio is preferably 10-1000, and the aspect ratio is particularly preferably 50-100. The carbon nanohorn has a hexagonal net-like cup shape. The cup-stacked carbon nanotube cups the carbon nanohorn It is preferable that it has a shape laminated in a shape, and has an aspect ratio of 10 to 100, and more preferably has an aspect ratio of 50 to 100.

Fullerenes are molecules based on carbon clusters, and by the definition of CAS, are molecules with a closed spherical shape in which 20 or more carbon atoms are bonded to three adjacent atoms. The single-layer fullerene has a shape like a soccer pole. The single-layer fullerene preferably has a diameter of 0.1 nm to 500 nm. The composition of the single-layer fullerene is preferably from C60 to C540. The single-layer fullerene is, for example, C 60, C 70, or C I 20. The diameter of C 60 is about 0.7 nm. The multilayer fullerene has a nested shape in which the above-described single-layer fullerenes are concentrically stacked. The multilayer fullerene preferably has a diameter of 0.1 nm to 100 nm, and particularly preferably has a diameter of 1 nm to 500 nm. The composition of the multilayer fullerene is preferably C60 to C540. For example, the multilayer fullerene preferably has a structure in which C 70 is arranged outside C 60 and C 120 is arranged further outside C 70. Such multi-layered fullerenes are described in, for example, Takahiro Kakiuchi et al., “Making large amounts of onion-structured fullerenes and applying them to lubricants” (Journal of the Japan Society of Precision Engineering, vo L67, No. 7, 2000) Year, P1175-P1 179). Further, the carbon filler includes the carbon filler (single-wall carbon nanotube, multi-wall carbon nanotube, vapor-grown carbon fiber, nanograph eye bar, carbon nanohorn, cup-stack carbon nanotube, single-wall fullerene, multi-wall fullerene) One of them can be made by doping boron. A method of dropping boron (boron) into the carbon filter is described, for example, in Japanese Patent Application Laid-Open No. 2001-200096. In the method described in Japanese Patent Application Laid-Open No. 2001-200096, carbon fiber produced by a gas phase method and boron (boron) are mixed by a Henschel mixer type mixer. The material is heat-treated at about 230 in a high frequency furnace or the like. Then, the heat-treated mixture is pulverized by a pulverizer. Next, the base resin and the pulverized product of the mixture are blended at a predetermined ratio, and are melt-kneaded by an extruder to produce a pellet.

In the embodiment of the present invention described above, the base resin is generally Styrene, polyethylene terephthalate, polycarbonate, polyacetal (polyoxymethylene), polyamide, modified polyphenylene ether, polybutylene terephthalate, polyphenylene sulfide, polyetheretherketone, polyetherimide, but other Plastics, for example, thermoplastic resins such as polysulfone, polyestersulfone, polyethylene, nylon 6, nylon 66, nylon 12, polypropylene, ABS resin and AS resin can also be used as the base resin. Further, as the base resin, two or more kinds of the above thermoplastic resins may be mixed and used. Further, additives (antioxidants, lubricants, plasticizers, stabilizers, fillers, solvents, etc.) may be added to the base resin used in the present invention.

(2) Configuration of the second embodiment

Next, the configuration of a second embodiment of the self-winding timepiece of the present invention will be described. The following description focuses mainly on the differences between the second embodiment and the first embodiment of the self-winding timepiece of the present invention. Therefore, the description of the first embodiment of the self-winding timepiece of the present invention described above applies mutatis mutandis to places not described below. The movement of the second embodiment of the self-winding timepiece of the present invention includes a pole bearing 262.

Referring to FIGS. 12 to 14, the pole bearing 262 includes an inner ring 268, an inner holding ring 270, an outer ring 272, and five poles 174. The retainer 276 is provided with five guide windows 276 m for respectively accommodating five poles 174 at intervals (preferably at equal intervals). The guide window part 276 m includes a semi-circular part for guiding the pole 174. The retainer 276 has an inner flange portion 276 f extending inward in the radial direction. Five inner flange portions 276 f are formed between the respective guide window portions 276 m. The inner portion 276 g of the inner flange portion 276 f is disposed between the inner ring 268 and the presser ring 270. With this configuration, the retainer 276 can be reliably held between the inner ring 268 and the presser ring 270. Therefore, with retainer ring 270, five balls 1 76 and outer ring 272, set retainer 276, and finally fix inner ring 268 to retainer ring 270 Good assemblability . Furthermore, since the amount of exposure of the lubricating surface to the outside of the ball bearing is smaller than in the conventional example, the amount of evaporation of lubricating oil and the amount of dust mixed in can be reduced.

(3) Configuration of the third embodiment

Next, the configuration of a third embodiment of the self-winding timepiece of the present invention will be described. The following description focuses mainly on the differences between the third embodiment and the first embodiment of the self-winding timepiece of the present invention. Therefore, the description of the first embodiment of the self-winding timepiece of the present invention described above applies mutatis mutandis to places not described below. The movement of the third embodiment of the self-winding watch of the present invention includes a ball bearing 362.

Referring to FIGS. 15 to 17, the pole bearing 362 includes an inner ring 3668, an inner holding ring 3710, an outer ring 372, and five balls 174. The retainer 376 includes an upper retainer portion 376b formed in a cylindrical shape, and a lower retainer portion 376c formed in a cylindrical shape. The upper retainer portion 376-1b and the lower retainer portion 376-1c are configured to be detachable. The upper retainer portion 3776b has five sets of receiving notches 3776j. The lower retainer portion 376c has five sets of hook projections 376k. By fixing the locking projections 376 k to the receiving notches 376 j, the upper retainer part 376 b and the lower retainer part 376 c are fixed so as to be integrated with each other. It is configured to be able to.

An upper guide window portion 3776 m for guiding the five poles 17 4 at intervals (preferably at equal intervals) is formed in the upper retainer portion 3776 b. The upper guide window 3776 m includes a portion formed in a U shape. A lower guide window portion 376 n for guiding the five balls 174 at intervals is formed in the lower retainer portion 376 c. The lower window 376 n includes a crescent-shaped part.

(4) Configuration of the fourth embodiment

Next, the configuration of a fourth embodiment of the self-winding timepiece of the present invention will be described. The following description focuses mainly on the differences between the fourth embodiment and the first embodiment of the self-winding timepiece of the present invention. Therefore, the description of the first embodiment of the self-winding timepiece of the present invention described above applies mutatis mutandis to places not described below. The movement of the fourth embodiment of the self-winding watch of the present invention includes a ball bearing 462. Referring to FIG. 18, the ball bearing 4 62 has an inner ring 4 6 8 and an outer holding ring.

4 7 0, outer ring 4 7 2 and 5 poles 1 7 4 are included. The outer holding ring 470 is fixed to the outer ring 472. The inner ring 4 6 8 constitutes an inner ring. The outer holding ring 470 and the outer ring 472 constitute an outer ring. The inner ring 468 has a first inner guide portion 468b and a second inner guide portion 468c for guiding the plurality of poles 174. The outer presser wheel 470 has a first outer guide portion 470b for guiding the plurality of balls 174. The outer ring 472 has a second outer guide portion 472c for guiding the plurality of poles 1Ί4. The five balls 1 74 are composed of a first inner guide 4 6 8 b and a second inner guide 4 6 8 c, and a first outer guide 4 7 0 b and a second outer guide 4 7 2 c. They are arranged with a space between them.

(5) Configuration of the fifth embodiment

Next, the configuration of a fifth embodiment of the self-winding timepiece of the present invention will be described. The following description focuses mainly on the differences between the fifth embodiment and the first embodiment of the self-winding timepiece of the present invention. Therefore, the description of the first embodiment of the self-winding timepiece of the present invention described above applies mutatis mutandis to places not described below. The movement of the fifth embodiment of the automatic timepiece of the present invention includes a pole bearing 562.

Referring to FIGS. 19 and 20, the pole bearing 562 includes an inner ring 568, an outer holding ring 570, an outer ring 572, and five poles 174. The outer holding ring 570 is fixed to the outer ring 572. The inner ring 5 6 8 constitutes an inner ring. The outer presser ring 570 and the outer ring 572 form an outer ring. The inner ring 568 has a first inner guide portion 568b and a second inner guide portion 568c for guiding the plurality of poles 174. The outer presser ring 570 is a first outer guide for guiding a plurality of balls 1Ί4.

570 b. The outer ring 572 has a second outer guide portion 572c for guiding the plurality of poles 174. The five balls 1 74 include a first inner guide portion 5668 b and a second inner guide portion 568 c, and a first outer guide portion 570 b and a second outer guide portion 572 c. Are spaced apart from each other.

The retainer 576 is provided with five guide holes 576 h for guiding the five poles 174 at intervals (preferably at equal intervals). Guide hole 5 7 6 h The ball 1 74 should be formed in a circular shape to guide it. An outer flange portion 576 f extending radially outward is formed on the retainer 576. Five outer flange portions 576 f are formed between each guide window portion 576 m. The outer portion 576 g of the outer flange portion 576 f is disposed between the outer presser ring 570 and the outer ring 572. With this configuration, the retainer 5776 can be reliably held between the outer holding ring 5770 and the outer ring 572. Therefore, with the outer ring 5 7 2, the five poles 1 7 6 and the inner ring 5 6 8 set, the retainer 5 7 6 is assembled, and finally, the outer holding ring 5 7 0 is fixed to the outer ring 5 7 2 It is easy to assemble. Furthermore, since the amount of exposure of the lubricating surface to the outside of the ball bearing is smaller than in the conventional example, the amount of lubricating oil evaporated and the amount of dust mixed can be reduced.

(6) Function of self-winding watch of the present invention

Next, the operation of the self-winding timepiece of the present invention will be described.

Referring to FIG. 4, when the oscillating weight 1660 rotates in the first direction, that is, in the clockwise direction in FIG. 2, the rotation of the oscillating weight 1778 causes the first transmission wheel 182 to move in FIG. Rotates counterclockwise.

The eccentric shaft portion 182d of the pawl lever 180 rotates eccentrically by the rotation of the first transmission wheel 182. Due to the eccentric movement of the pawl lever 180, the pulling pawl 180c and the pressing pawl 180d reciprocate along the outer peripheral portion of the second transmission wheel 1804, respectively. As a result, the second transmission wheel 184 rotates in a fixed direction, that is, in the counterclockwise direction in FIG. 2, due to the reciprocating motion of the puller 180c and the pusher 180d. The counter-clockwise rotation of the second transmission wheel 18 4 causes the square hole wheel 1 18 to rotate in a fixed direction, ie, clockwise in FIG. The mainspring 1 2 2 accommodated in the barrel box 120 is wound up by the rotation of the square hole wheel 1 18. Due to the force of the mainspring 1 2 2, the barrel 1 2 0 always rotates in a fixed direction, that is, clockwise in FIG.

When the oscillating weight 1660 rotates in the second direction, that is, in the counterclockwise direction in FIG. 2, the rotation of the oscillating weight 1778 causes the first transmission wheel 182 to move clockwise in FIG. ) Rotates. When the above-mentioned rotary weight 1 60 rotates in the first direction Similarly to the operation of, the pawl lever 180 causes the eccentric shaft portion 182d to perform eccentric motion by the rotation of the first transmission wheel 182. Due to the eccentric movement of the pawl lever 180, the pulling pawl 180c and the pressing pawl 180d reciprocate along the outer peripheral portion of the second transmission wheel 184, respectively. As a result, the second transmission wheel 184 rotates in a fixed direction, that is, the counterclockwise direction in FIG. The rotation of the second transmission wheel 184 causes the square wheel 118 to rotate in a fixed direction, that is, the clockwise direction in FIG. 2, and winds up the mainspring 122 accommodated in the barrel car 120. The rotation of barrel car 120 rotates the second wheel 1 24, the third wheel 126, the fourth wheel 128, the sun wheel 148, and the hour wheel 154. The rotation speed of barrel box 120 is controlled by a governing device including balance 136 and an escapement device including ankle 138 and escape wheel 134.

Next, in the above embodiment, an example of experimental data showing that the resin containing the carbon filler is excellent in sliding performance will be described with reference to Tables 1 and 2. Table 1 shows that the carbon filler is 20 wt. The sliding performance (dynamic friction coefficient and specific wear) of the polyamide resin 12 (PA12) and polycarbonate resin (PC) to which% is added is shown. That is, in Table 1, VGCF (registered trademark) “VaperGownGownCarbonFiber: vapor-grown carbon fiber” is a resin to which 20% by weight of a carbon filler is added. From this experimental data, it is possible to determine whether the surface of the resin containing the carbon filler is slippery or not and is hard to wear. For comparison, the characteristics of the non-composite material (resin alone, that is, PA 12 and PC itself) to which no carbon filler is added are shown as “BLANK:”.

Each of the above resins is injection molded under the molding conditions shown in Table 2. In other words, the composite material in which carbon filler was added to PA 12 at 20% by weight was heated to a temperature of 220 V, 23 Ot :, 22 O, 210, 70t :, and the non-composite material of PA12 is 190t :, 200, 180, 17 Ot :, 70t :, respectively. In addition, the composite material with 20% by weight of carbon filler added to PC is The temperatures are 290, 310V, 29O, 270, 80, respectively, and the non-composite materials for PC are 280, 29O :, 27 Ot :, 260 ", 8 ot, respectively.

In Table 1, the coefficient of kinetic friction and the specific wear (mrr ^ ZN · km) were determined by applying a resin piece of a specified shape ((/> 55 mm x thickness 2 mm) to a 0.5 m / sec It shows the value when sliding on a steel plate (S45C) at the speed of 1. These measuring methods are based on the plastic sliding wear test method (JISK7218 standard). JIS: Japanese Industrial Standard).

As shown in Table 1, in PA12 and PC, the sliding performance (dynamic friction coefficient and specific wear) of the composite material with the carbon fiber added was significantly improved compared to the non-composite material without the addition. ing. Here, the coefficient of kinetic friction is a measure of the smoothness and surface property of the surface of the above composite material.For example, by using a composite material having a small coefficient of kinetic friction to form a pole bearing retainer or the like, without using lubricating oil, The sliding characteristics of the pole bearing can be improved. In addition, by forming the retainer of the ball bearing from a composite material having a small specific wear amount, the wear resistance of the retainer can be improved.

Therefore, in the present embodiment, since the components forming the retainer of the pole bearing are formed of a resin containing a carbon filler, the sliding characteristics of the retainer are improved, and lubricating oil is applied to the pole in the pole bearing. Even when not performed, wear of the retainer can be reduced. Therefore, according to the present embodiment, it is not necessary to lubricate the pole bearing, so that the performance of the pole bearing can be maintained for a long period of time. It is possible to provide a pole bearing that is less susceptible to noise.

Further, according to the present embodiment, by lubricating the ball of the pole bearing with lubricating oil, it is possible to realize a pole bearing that can withstand a load heavier than a conventional ball bearing. Further, according to the present embodiment, since wear of the retainer is reduced, it is possible to suppress the wear powder from being contained in the lubricating oil of the ball bearing. Thus, a change in the viscosity of the lubricating oil can be suppressed, and a pole bearing that withstands a heavier load and has a long life can be provided.

As a result, when the ball bearing of the present embodiment is applied to a self-winding watch, the life of the self-winding watch can be prolonged. Industrial applicability

In the pole bearing of the present invention, the retainer is formed of a resin containing a filler in which the base resin is a thermoplastic resin, and the base resin is filled with a force pump. The resin containing the filler has a low coefficient of friction and excellent wear characteristics. In the ball bearing of the present invention, when lubricating oil is injected into the pole, there is little possibility that the retainer will be worn, so that there is little possibility that the wear powder is contained in the lubricating oil. Therefore, in the pole bearing of the present invention, the viscosity of the lubricating oil is less likely to change, and the performance of the pole bearing is less likely to be reduced. Therefore, in the ball bearing of the present invention, when lubricating oil is injected into the pole, a structure that can withstand a heavy load can be realized, and the life of the ball bearing can be extended.

As a result, the pole bearing of the present invention can be used as a bearing for clocks, measuring equipment, photographing and recording equipment, video recording equipment, printing equipment, machine tools, processing and assembling machines, transporting, transporting, and dispensing (dispensing) machines. It can be widely applied.

In the self-winding timepiece of the present invention, when lubricating oil is injected into the ball, a structure that can withstand a heavy load can be realized, and the life of the self-winding timepiece can be extended. Further, in the self-winding timepiece of the present invention, when lubricating oil is not lubricated to the ball, the above-mentioned problem associated with lubrication can be solved. Therefore, in the self-winding timepiece of the present invention, when lubricating oil is not injected into the pole, a structure that can withstand a light load can be realized, and the performance of the self-winding timepiece can be improved. table 1

PA12 PC Item Unit VGCF VGCF

BLANK BLANK

20wt 20wt%

0.25 0.56 0.18 0.51 ratio of dynamic friction coefficient wear amount ^{^{mm 3 / N · km 3.8x10- 13}} 5.2xl0 "11 3.3x10- 8 8.1x10- 8

Table 2

ΡΑ12 PC

VGCF BLANK VGCF BLANK

Nozzle 220 ° C 190 ° C 280 ° C Front 230 ° C 200 ° C 310 ° C 290 ° C Middle 220 ° C 180 ° C 290 ° C 270 ° C Rear 210 ° C 170 ° C 270 ° C 260 ° C ιέ / dish degree 70 ° C 70 ° 80 ° C 80 ° C

Claims

The scope of the claims

1. Including an outer wheel, an inner wheel, a plurality of balls (174), and a retainer (176, 276, 376, 476, 576) for positioning the plurality of balls (174). The outer wheel has an outer plan interior for guiding the plurality of poles (174); the inner wheel has an inner plan interior for guiding the plurality of balls (174); The pawl is disposed between the outer guide and the inner guide,

The retainer (176, 276, 376, 476, 576) is formed of a resin containing a filler in which the base resin is a thermoplastic resin and the base resin is filled with carbon fiber as a filler.

Ball bearing that specializes in that.

2. The base resin is composed of polystyrene, polyethylene terephthalate, polyphenol, polyacetal (polyoxymethylene), polyamide, modified polyphenylene ether, polybutylene terephthalate, polyphenylene sulfide, polyetheretherketone, and polyetherimide. The pole bearing according to claim 1, wherein the pole bearing is selected from a group.

3. The carbon filler is a single-walled carbon nanotube, a multi-walled carbon nanotube, a vapor-grown carbon fiber, a nanograph eye bar, a carbon nanohorn, a cup-stacked carbon nanotube, a single-walled fullerene, a multi-layered fullerene, and the carbon filler. 3. The ball bearing according to claim 1, wherein the ball bearing is selected from the group consisting of a contaminant doped with boron (boron).

4. The inner ring includes an inner ring (168, 268, 368) and an inner holding ring (170, 270, 370), and the inner guide portion includes the inner ring (168, 268, 36). 8) and the inner presser ring (170, 270, 370) is formed on the pole bearing according to any one of claims 1 to 3.

5. The outer ring includes an outer ring (472, 572) and an outer holding ring (470, 570), and the outer guide portion is connected to the outer ring (472, 572) and the outer holding ring (470, 570). The pole bearing according to any one of claims 1 to 3, wherein the pole bearing is formed.

6. The retainer (176) is formed in a cylindrical shape, and a guide hole or a guide window for guiding the plurality of poles (174) is provided at an interval.

The ball bearing according to any one of claims 1 to 5, wherein the ball bearing is formed as follows.

7. The retainer (176) is formed in a cylindrical shape, and a guide hole or a guide window for guiding the plurality of poles (174) is provided at an interval.

)

Further, an inner flange portion (276f) extending inward in the radial direction is formed on the retainer (276), and an inner portion (276g) of the inner flange portion (276f) is The pole bearing according to any one of claims 1 to 4, wherein the pole bearing is disposed between the inner ring (268) and the inner presser ring (270).

8. The retainer (176) is formed in a cylindrical shape, and a guide hole or a guide window for guiding the plurality of poles (174) is formed in the retainer (176) at an interval. And

Further, the retainer (576) has an outer flange portion (576f) extending radially outward, and the outer portion (576g) of the outer flange portion (576f) 6. The pole bearing according to claim 1, wherein the pole bearing is disposed between an outer ring (572) and the outer holding ring (570). 7. G

9. The retainer (376) includes an upper retainer portion (376b) formed in a cylindrical shape, and a lower retainer portion (376c) formed in a cylindrical shape, and the upper retainer portion (376b). And the lower retainer portion (376c) is configured to be detachable, and a guide window portion for guiding the plurality of balls (174) at an interval.

The pole according to any one of claims 1 to 5, wherein (376m, 376n) is formed in the upper retainer portion (376b) and the lower retainer portion (376c). bearing.

10. In self-winding watches,

A rotating weight (160) including a rotating weight (1 66);

A ball bearing (162, 262, 362, 462, 562) according to any one of the preceding claims and a mainspring (122) for rotatably supporting the oscillating weight (160). An automatic winding mechanism (180, 182, 184) operated by rotation of the rotary weight (160);

A self-winding watch characterized by comprising: