JP4531534B2 - Pointer drive mechanism - Google Patents

Description

  The present invention relates to a pointer driving mechanism that drives a pointer of a timepiece.

In general, a pointer driving mechanism for driving the hands of a timepiece is configured by rotatably providing a minute hand support shaft and an hour hand support shaft with respect to the main plate. The hour hand support shaft is a pipe-like member that penetrates the minute hand support shaft. Usually, another support member is assembled to the main plate, and the minute hand support shaft and the hour hand support shaft are supported by the main plate and the other support member. Further, a date wheel that connects the minute hand support shaft and the hour hand support shaft is provided between the main plate and the other support member. Such a pointer driving mechanism is also disclosed in Patent Documents 1 to 7.
JP-A-5-232250 Japanese Patent Laid-Open No. 10-48349 Japanese Patent Laid-Open No. 10-282252 JP 2000-147147 A JP 2000-212277 A JP 2001-108762 A JP 2002-357672 A

  In recent years, the functions and designs of watches have been increasingly diversified, and further rationalization of the above-described pointer drive mechanism according to the functions and forms is desired. For example, according to a conventional pointer driving mechanism, a predetermined support member is required in addition to the ground plane, and the omission of such a support member is also considered as one of the examination subjects. This invention is made | formed in view of this situation, The objective is to obtain the pointer drive mechanism formed by simplifying a support structure.

According to the first aspect of the present invention, in the pointer driving mechanism for driving the pointer of the timepiece, the main plate, the cylindrical bearing fixed to the main plate, and the inner periphery of the bearing are rotatably held. A minute hand support shaft, an hour hand support shaft rotatably held on the outer periphery of the bearing body, a date wheel provided rotatably on the main plate, and a pointer support shaft rotating means for rotating the minute hand support shaft; The minute hand support shaft includes a pinion that meshes with the gear of the date wheel, the bearing body includes an opening that exposes the pinion of the minute hand support shaft, and the hour hand support shaft includes the date This is a pointer drive mechanism having a configuration that includes a gear that meshes with the reverse wheel of the rear wheel.

The invention described in claim 2 of the present application is the pointer according to claim 1 , wherein an elastic member for preventing backlash of the hour hand support shaft is provided between the bearing body and the hour hand support shaft. It is a drive mechanism.

  According to the present invention, it is possible to obtain a pointer drive mechanism in which the support structure is simplified.

  Embodiments of the present invention will be described below with reference to the drawings. The timepiece 1 of this example shown in FIGS. 1 to 9 is an analog timepiece that rotates the hour hand 210 and the minute hand 220 at respective predetermined speeds. A pointer driving mechanism 200 for driving the hour hand 210 and the minute hand 220 is disposed on the transparent time display unit 100. According to the time display unit 100, the back side of the timepiece 1 is visible, and the near side is visible from the back side. It can be seen at a glance that a gear or the like is not connected to the pointer drive mechanism 200. In other words, it is intriguing to the viewer who watches the watch 1 why the hands move.

  The timepiece 1 includes a pointer driving mechanism 200 that drives the pointers 210 and 220, a first transparent plate 310 that is mounted so that the pointer driving mechanism 200 can be driven, and the first transparent plate 310 that faces the pointer driving mechanism 200. The first transparent plate 310 is interposed between the second transparent plate 320 and the second transparent plate 320, and the third transparent plate 330 having the second transparent plate 320 interposed between the combined second transparent plate 320 and the first transparent plate 310. The fourth transparent plate 340, the frame 400 that covers the moving region of the edge of the second transparent plate 320, the plurality of rollers 500 that pivotally support the second transparent plate 320, and the second transparent plate 320 as the first transparent A driving unit 600 that drives the plate 310 and a case body 700 that houses the driving unit 600 are provided. Each of the transparent plates 310, 320, 330, and 340 is a transparent or translucent plate material made of glass or resin. The first transparent plate 310 and the third transparent plate 330 are supported by a first spacer 301 provided between them at an appropriate interval. In addition, second spacers 302 are provided between the first transparent plate 310 and the second transparent plate 320 and between the second transparent plate 320 and the third transparent plate 330 at appropriate intervals. The second spacer 302 is a member that regulates the distance between the first transparent plate 310, the second transparent plate 320, and the third transparent plate 330. The frame body 400 covers the moving region of the second transparent plate 320 and supports the edge portions of the first transparent plate 310, the third transparent plate 330, and the fourth transparent plate 340. The time display unit 100 is a part surrounded by the frame 400 and is in a state where the transparent plates 310, 320, 330, and 340 are overlapped. Any one of the first transparent plate 310, the third transparent plate 330, and the fourth transparent plate 340 is provided with a time indicator portion 101. The pointer driving mechanism 200 is driven in conjunction with the revolution of the second transparent plate 320.

  The first transparent plate 310, the second transparent plate 320, and the third transparent plate 330 are provided with extending portions 311, 321, and 331 that extend into the case body 700, respectively.

  The case body 700 has the frame body 400 mounted thereon, and includes a first transparent plate 310 and a second transparent plate that include a communication portion 710 that communicates the inside of the case body 700 with the inside of the frame body 400. 320 and the extended portions 311, 321, 331 of the third transparent plate 330 extend through the communication portion 710 and extend into the frame 700.

  The driving means 600 is rotatably attached to a movement 610 for a watch incorporating a motor, a train wheel mechanism 620 connected to the movement 610, and an extending portion 331 of the third transparent plate 330, and the second transparent plate. The rotation drive unit 630 that pivotally supports the extension part 321 of 320 and the needle alignment pinion 640 meshed with the main part of the train wheel mechanism 620, and the power output from the movement 610 rotates via the train wheel mechanism 620. The rotation drive unit 630 is transmitted to the drive unit 630, and the rotation drive unit 630 operates the extending portion 321 of the second transparent plate 320 to revolve the second transparent plate 320 in the vertical direction. The second transparent plate 320 rotates once per hour. When the hand aligner 640 is manually rotated, the rotation driving unit 630 is rotated according to the rotation. Specifically, the needle aligner 640 is used when the positions of the hour hand 210 and the minute hand 220 are arbitrarily adjusted.

  Each roller 500 that pivotally supports the second transparent body 320 is mounted between the first transparent plate 310 and the third transparent plate 330, respectively. In the illustrated example, a plurality of rollers 500 covered by the frame body 400 and a single roller 500 located inside the case body 700 are provided. Since each roller 500, the 1st spacer 301, and the 2nd spacer 302 are hidden in the frame 400 and the case body 700, they are not visible from the outside.

  The interval between the rotation shaft 631 of the rotation drive unit 630 and the pivot shaft 632 of the second transparent plate 320 is set equal to the interval between the rotation shaft 501 of the roller 500 and the pivot shaft 502 of the second transparent plate 320. ing. The pivot shaft 632 of the rotation drive unit 630 and the pivot shaft 502 of the roller 500 rotate with the same period and the same radius (in the directions of arrows A and B in FIG. 5). The second transparent plate 320 revolves with respect to the first transparent plate 310 (in the direction of arrow C in FIG. 5) while the pivot shaft 632 of the rotation drive unit 630 and the pivot shaft 502 of each roller 500 rotate.

  In this example, the pointer drive mechanism 200, the first transparent plate 310, the second transparent plate 320, the third transparent plate 330, the first spacer 301, the second spacer 302, the roller 500, and the rotation drive unit. 630 are integrated into one unit, and the first transparent plate 310 and the third transparent plate 330 are closed with a closing member 102 such as a single-sided adhesive tape, and the second transparent plate 320 is formed. It has an enclosed configuration (see FIG. 6). According to such a configuration, it is possible to prevent dust from adhering to the second transparent plate 320. When dust adheres to the second transparent plate 320, the mechanism for driving the pointer driving mechanism 200 is easily found. According to this example, such a situation is prevented in advance.

  As shown in FIGS. 7 to 9, the pointer drive mechanism 200 of this example uses a first transparent plate 310 as a ground plate. The pointer driving mechanism 200 includes a first transparent plate 310 that is a base plate, a cylindrical bearing body 230 fixed to the first transparent plate 310, and a minute hand support shaft 240 that is rotatably held on the inner periphery of the bearing body 230. The hour hand support shaft 250 rotatably held on the outer periphery of the bearing body 230, the date wheel 260 provided rotatably on the first transparent plate 310, and the pointer support shaft rotation for rotating the minute hand support shaft 240. Means. The pointer support shaft rotating means in this example is the second transparent plate 320 and the driving means 600 described above. The proximal end portion 211 of the hour hand 210 and the proximal end portion 221 of the minute hand 220 are fixed to the hour hand support shaft 250 and the minute hand support shaft 240, respectively. In addition, 201 in a figure is a resin-made ring-shaped seat. Such a seat 201 is appropriately disposed between the members as necessary.

  The bearing body 230 includes a first cylindrical portion 231 and a second cylindrical portion 232 having a diameter smaller than that of the first cylindrical portion 231, and a first portion is provided in a hole portion 312 provided at an important point of the first transparent plate 310. The cylindrical portion 231 is press-fitted and fixed to the first transparent plate 310. On the outer periphery of the first cylindrical portion 231, a rib 233 that restricts the amount of insertion of the first cylindrical portion 231 into the hole 312 is provided. Moreover, the opening part 234 which exposes the inside is provided in the principal part of the 1st cylindrical part 231. As shown in FIG.

  The minute hand support shaft 240 is a member that penetrates the bearing body 230, the hour hand support shaft 250, and the proximal end portion 211 of the hour hand. A male screw part 241 is screwed to the tip, and the bearing body 230 and the hour hand support shaft 250 are prevented from coming off by the male screw part 241. A proximal end portion 211 of the hour hand 210 is press-fitted and fixed to the hour hand support shaft 250. The proximal end portion 221 of the minute hand 220 is press-fitted and fixed to the male screw component 241. A female screw part for screwing the male screw part 241 is formed at the tip of the minute hand support shaft 240. The male thread component 241 and the female thread portion are reverse threads so that they do not loosen due to the rotation of the minute hand 220.

  Further, the minute hand support shaft 240 includes a pivot shaft 242 that is locked to the second transparent plate 320. The pivot shaft 242 of the minute hand support shaft 240 is pivotally supported by a bearing 322 provided at an important point of the second transparent plate 320, and the minute hand support shaft 240 rotates with the revolution of the second transparent plate 320. The pivot shaft 242 rotates with the same period and the same radius as the pivot shaft 632 of the rotation driving unit 630 and the pivot shaft 502 of the roller 500. A decorative disk 244 is fixed to the tip of the pivot shaft 242 with a bolt 243.

  Further, the minute hand support shaft 240 includes a pinion 245 that meshes with the gear 265 of the date wheel 260. The pinion 245 of the minute hand support shaft 240 is housed inside the first cylindrical portion 231 of the bearing body 230, and a part thereof is exposed from the opening 234 of the bearing body 230. The gear 265 of the date wheel 260 is meshed with a portion exposed from the opening 234.

  The hour hand support shaft 250 is a cylindrical member that is inserted through the second cylindrical portion 232 of the bearing body 230. A gear 251 that meshes with the pinion 266 of the date wheel 260 is provided at the end of the bearing body 230 side. Further, the proximal end portion 211 of the hour hand 210 is fixed to the other end portion.

  Further, an elastic member 270 for preventing backlash of the hour hand support shaft 250 is provided between the bearing body 230 and the hour hand support shaft 250. The elastic member 270 of this example is a leaf spring that is inserted between the second cylindrical portion 232 of the bearing body 230 and interposed between the first cylindrical portion 231 of the bearing body 230 and the gear 251 of the hour hand support shaft 250. . According to such a configuration, appropriate sliding loads can be obtained on the minute hand support shaft 240 and the hour hand support shaft 250, and backlash thereof can be prevented. Further, not only the backlash of the minute hand support shaft 240 and the hour hand support shaft 250 but also the backlash in the train wheel mechanism 620 connected thereto can be prevented.

  The date wheel 260 has a gear 265 that meshes with the pinion 245 of the minute hand support shaft 240 and a pinion 266 that meshes with the gear 251 of the hour hand support shaft 250, and is pivotally supported by the first transparent plate 310. A hole portion 313 for mounting the support shaft 261 of the date wheel 260 is provided at an important point of the first transparent plate 310, and the support shaft 261 is inserted into the hole portion 313 and the locking tool 262. It is fixed at. The date wheel 260 is fixed to the support shaft 261 with a predetermined fixing member 263 and a bolt 264.

  According to such a configuration, the hour hand 210 and the minute hand 220 rotate at a predetermined speed as the second transparent plate 320 revolves. The revolution period of the second transparent plate 320 is 1 hour. The hour hand 210 rotates once in 12 hours, and the minute hand 220 rotates once in one hour.

  As described above, the timepiece 1 of this example is excellent in decorativeness and rationally configured. The pointer drive mechanism 200 uses the first transparent plate 310 as a base plate, and its support structure is simplified. That is, according to the conventional pointer drive mechanism, a predetermined support member is required in addition to the ground plane. However, the pointer drive mechanism 200 of the present example omits such a support member and is the first transparent base plate. This is configured to support only the plate 310.

  In this example, the hour hand 210 and the minute hand 220 are driven, but it is also possible to drive the second hand by revolving the second transparent plate 320 once per minute. The configuration of this example can also be applied to an automatic correction clock that receives time information such as a standard time radio wave and automatically corrects the display time by the pointer based on the time information. In the case of an automatically corrected timepiece, a receiving means for receiving time information, a microcomputer storing a predetermined program for controlling the movement 610, and the like are provided. Furthermore, the configuration of each part in the present example can be appropriately changed in design within the technical scope described in the claims, and is of course not limited to the illustrated example.

  Next, another embodiment of the present invention will be described with reference to FIGS. The second transparent plate 320 of this example is a circular plate having the center as a rotation axis. A gear at the tip of the gear train mechanism 620 is provided between the first transparent plate 310 and the third transparent plate 330, and this gear meshes with an annular tooth portion 650 provided on the second transparent plate. The second transparent plate 320 is rotatably held by a plurality of pulleys 660 supported by the first transparent plate 310 and the third transparent plate 330, and the power output from the movement 610 is annular via the train wheel mechanism 620. It is rotated by being transmitted to the tooth portion 650. The pointer driving mechanism 200 is engaged with the second transparent plate 320 and is driven by the rotation of the second transparent plate 320. The other basic configuration is the same as that of the above-described embodiment.

  In this manner, the second transparent plate 320 may be rotated to drive the pointer driving mechanism 200. Note that the second transparent plate 320 is not limited to revolution or rotation, but can be configured to reciprocate or swing.

  The pointer drive mechanism of the present invention has a simplified support structure and can be suitably used in various analog watches. In particular, by simplifying the support structure, it is possible to contribute to diversification of the function and design of the watch.

1 is a perspective view showing a timepiece according to an embodiment of the present invention. It is a see-through | perspective front view which concerns on the Example of this invention and shows a timepiece. 1 is a perspective top view showing a timepiece according to an embodiment of the present invention. 1 is a perspective side view showing a timepiece according to an embodiment of the present invention. FIG. 3 is an enlarged view of a main part of FIG. 2 according to the embodiment of the present invention, and is a perspective front view showing a drive unit. FIG. 6 is a perspective front view showing a unit in which a first transparent plate, a second transparent plate, a third transparent plate, and a pointer drive mechanism are assembled together according to an embodiment of the present invention. FIG. 5 is a side sectional view showing a pointer driving mechanism according to an embodiment of the present invention. It is a side cross-sectional exploded view which shows the pointer drive mechanism according to the embodiment of the present invention. FIG. 8 is an enlarged view of a main part of FIG. 7 in relation to the embodiment of the present invention, and is a side cross-sectional view showing the main part of the pointer drive mechanism. It is a see-through | perspective front view which concerns on 2nd Example of this invention, and shows the unit which assembled | attached the 1st transparent plate, the 2nd transparent plate, and the 3rd transparent plate integrally, and a drive means. It is a see-through | perspective side view which concerns on 2nd Example of this invention, and shows the unit which assembled | attached the 1st transparent plate, the 2nd transparent plate, and the 3rd transparent plate integrally, and a drive means.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Clock 100 Time display part 101 Index part 102 Closing member 200 Pointer drive mechanism 201 Seat 210 Hour hand 211 Base end part 220 Minute hand 221 Base end part 230 Bearing body 231 1st cylindrical part 232 2nd cylindrical part 233 Rib 234 Opening part 240 Minute hand Support shaft 241 Male thread component 242 Pivot shaft 243 Bolt 244 Disk 245 Kana 250 Hour hand support shaft 251 Gear 260 Hourglass 261 Support shaft 262 Locking tool 263 Fixing member 264 Bolt 265 Gear 266 Kana 270 Elastic member 301 First spacer 302 Second spacer 310 First transparent plate 311 Extension portion 312 Hole portion 313 Hole portion 320 Second transparent plate 321 Extension portion 322 Bearing 330 Third transparent plate 331 Extension portion 340 Fourth transparent plate 400 Frame body 500 Roller 501 Rotation Axis 502 Pivot Axis 600 It means 610 Movement 620 gear train mechanism 630 rotating unit 631 rotating shaft 632 pivot 640 Hariawase Kana 700 case body 710 communicating portion

Claims (2)

In the pointer drive mechanism that drives the hands of the watch,
With the main plate,
A cylindrical bearing body fixed to the base plate;
A minute hand support shaft rotatably held on the inner periphery of the bearing body;
An hour hand support shaft rotatably held on the outer periphery of the bearing body;
A date wheel provided rotatably on the main plate,
A pointer support shaft rotating means for rotating the minute hand support shaft;
The minute hand support shaft includes a pinion that meshes with the gear of the date wheel,
The bearing body includes an opening that exposes the kana of the minute hand support shaft,
The pointer drive mechanism according to claim 1, wherein the hour hand support shaft includes a gear that meshes with a pinion of the date wheel. The pointer drive mechanism according to claim 1, wherein an elastic member for preventing backlash of the hour hand support shaft is provided between the bearing body and the hour hand support shaft .

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