JP4518398B2 - Transmission - Google Patents

Description

  The present invention relates to a transmission device excellent in decorativeness, and is suitably used as a device for driving a watch pointer, a decorative ornament, and the like.

In the transmission device used for decoration, the visual fun is important. For example, Patent Document 1 proposes a timepiece in which a pointer is provided on a transparent plate and configured so that a mechanism for driving the pointer is not apparent from the appearance. In other words, it is intriguing for those who watch the clock why the hands move. The transmission includes a first transparent plate on which a driven portion is drivably mounted, a second transparent plate facing the first transparent plate and engaged with the driven portion, and the second transparent plate as a first transparent plate. Driving means for revolving the driven member, and the driven portion is driven in conjunction with the revolution of the second transparent plate.
JP 2005-5482 A

  Now, with regard to this type of transmission device, it is important to improve the driving efficiency of the driven part and the durability, etc. Considering these conditions, further structural ingenuity is demanded. The present invention has been made in view of such circumstances, and an object of the present invention is to provide a transmission device that is excellent in decorativeness and configured more rationally.

The invention described in claim 1 of the present application is a transmission device for transmitting power to a driven part, the first transparent plate on which the driven part is drivably mounted, and the first transparent plate facing the first transparent plate. A second transparent plate engaged with the drive unit; and drive means for revolving the second transparent plate with respect to the first transparent plate, wherein the driven unit is interlocked with the revolution of the second transparent plate. In the driving transmission device, a reinforcing member is provided at an edge of the second transparent plate to prevent deformation of the second transparent plate and to absorb a dimensional difference between the second transparent plate and the reinforcing member. A transmission device having a structure provided with an absorbing means .

The invention described in claim 2 of the present application is a transmission device for transmitting power to a driven part, the first transparent plate on which the driven part is drivably mounted, and the first transparent plate facing the first transparent plate. A second transparent plate engaged with the drive unit; a third transparent plate with the second transparent plate interposed between the first transparent plate; and the second transparent plate revolving with respect to the first transparent plate. And a driving means for driving the driven portion in conjunction with the revolution of the second transparent plate, and a support for holding the first transparent plate and the third transparent plate is provided. One transparent plate, the second transparent plate, the third transparent plate, the driven part, and the support are assembled as a unit, and the support is supported by a case body, and the transmission device Is a size difference absorbing means for absorbing a size difference between the support body and the case body. A gearing provided configuration.

  According to the present invention, it is possible to obtain a transmission device that is excellent in decorativeness and configured more rationally.

  A first embodiment of the present invention will be described below with reference to FIGS. The transmission device 1 of this example shown in FIGS. 1 to 6 is an analog timepiece that transmits power to a timepiece driving unit 200 of a timepiece that rotates an hour hand 210 and a minute hand 220 at respective predetermined speeds. The pointer driving mechanism 200 is disposed on the transparent time display unit 100. According to the time display unit 100, the rear side of the transmission device 1 can be seen through, and the front side can be seen through from the rear 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, for those who see the transmission device 1, it is intriguing why the pointer moves.

  The transmission device 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, a pointer driving mechanism 200 that faces the first transparent plate 310, and Between the engaged second transparent plate 320 and the first transparent plate 310, the third transparent plate 330 is interposed between the second transparent plate 320 and the first transparent plate 310 is interposed between the second transparent plate 320. The fourth transparent plate 340, the frame body 400 that covers the movement 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. A driving unit 600 that drives the transparent 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 extending portions 311, 321, 331 of the third transparent plate 330 extend through the communication portion 710 and extend into the case body 700.

  In the case of this example, a reinforcing member 322 is provided at the edge of the second transparent plate 320. The reinforcing member 322 is provided so as to be hidden inside the frame body 400 and the case body 700 with respect to each side of the second transparent plate 320. The reinforcing member 322 is provided by thickly inserting or screwing a metal member having a U-shaped cross section. According to the reinforcing member 322, deformation of the second transparent plate is prevented.

  The 2nd transparent plate 320 is a member which transmits motive power to the pointer drive mechanism 200 which is a to-be-driven part, and needs to revolve with a sufficient precision. In this regard, due to subtle deformation (warping, etc.) of the second transparent plate 320 accompanying temperature change, humidity change, change with time, etc., there is a risk that the drive system of the transmission device 1 will stagnate and so on, so that accurate power transmission may not be realized. There is. When the deformation of the second transparent plate 320 is significant, the transmission device 1 may be stopped. The deformation of the second transparent plate 320 becomes prominent particularly when a resin plate material is employed. That is, the configuration of the present example in which the reinforcing member 322 is provided at the edge of the second transparent plate 320 to prevent the deformation of the second transparent plate 320 addresses such a problem specific to the transmission device 1. It is very effective in improving durability and power transmission efficiency.

  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 resin bearing 323 provided at an important point of the second transparent plate 320, and the minute hand support shaft 240 is rotated along with the revolution of the second transparent plate 320. Rotate. According to the bearing 323, wear of the second transparent plate 320 is avoided. Therefore, the durability of the transmission device 1 is reliably improved. 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 transmission device 1 of the present example is excellent in decorativeness and rationally configured. 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.

  In addition, when transporting the transmission device 1 or the like, there may be a case where damage or failure due to the influence of vibration is caused. In order to prevent such breakage or failure, for example, as shown in FIG. Locking means 800 shown in the figure avoids the influence of vibration by inserting rods through holes provided in the required members to suppress their relative movement. Or you may comprise so that a female thread part may be formed in a required member and a rod may be screwed together in this. The transmission device 1 is used after the rod body is pulled out.

  Furthermore, the shape of the frame body 400, the case body 700, and the transparent plates 310, 320, 330, and 340 can be arbitrarily set. For example, as shown in FIGS. It is done.

  In addition to the pointer driving mechanism 200, the driven portion can be configured to drive a decorative ornament or the like. Further, a plurality of driven parts may be provided on the first transparent plate 310 and each driven part may be engaged with the second transparent plate 320 to drive the plurality of driven parts. Alternatively, it is also possible to arrange a plurality of pairs of the first transparent plate 310 and the second transparent plate 320 provided with driven parts. Furthermore, it is also possible to provide a second transparent plate 320 before and after the first transparent plate 310 so that one or a plurality of driven parts are driven by the plurality of second transparent plates 320. In the case of providing a plurality of second transparent plates 320, it is possible to obtain a more complicated driven form of the driven part by setting the revolution speed and revolution magnitude of each second transparent plate 320 to be different from each other. It becomes.

  Next, a second embodiment of the present invention will be described with reference to FIGS. As shown in these drawings, the transmission device 1 of this example includes a driving load reducing unit 900 that reduces the load of the driving unit 600 with respect to the load of the second transparent plate 320. A support body 303 is installed between the extending portion 311 of the first transparent plate 310 and the extending portion 331 of the third transparent plate 330. The drive load reducing means 900 includes a vertical slide shaft 901 provided on the support 303, a weight 902 provided so as to be movable up and down along the slide shaft 901, and an extension of the first transparent plate 310. A pulley 903 provided between the portion 311 and the extending portion 331 of the third transparent plate 330, a support member 905 provided at a key point of the extending portion 321 of the second transparent plate 320, and the pulley 903. A string body 904 that rotates and connects the weight 902 and the support member 905 is provided. The slide shaft 901, the weight 902, the pulley 903, the string 904, and the support member 905 are provided symmetrically so as to ensure balance. The load on the driving unit 600 is reduced by canceling the load on the second transparent plate 320 and the load on the weight 902. The weight of the weight 902 may be adjusted by cutting or pasting. Further, if a bearing is attached to the support shaft of the pulley 903, it is possible to ensure smoother movement of the weight 902. In that case, since the sliding load with respect to the string 904 is reduced, the durability of the string 904 is also improved. As the string body 904, a flexible wire or the like may be employed.

  Furthermore, when the transmission device 1 is transported, it is conceivable that the driving load reducing means 900 may be damaged or broken due to the influence of vibration. In order to prevent such breakage or failure, for example, as shown in FIG. 14, second locking means 810 may be provided. The second locking means 810 shown in the figure is configured to screw a male screw part into a female screw part provided on the support 303, and the male screw part holds the weight 902 on the uppermost moving area of the slide shaft 901. It has become. The transmission device 1 is used after removing the male screw part. The other basic configuration is the same as that of the above-described embodiment.

  Thus, by reducing the load of the driving unit 600 with respect to the load of the second transparent plate 320, the power of the driving unit 600 can be saved, which is more rational.

  Next, a third embodiment of the present invention will be described with reference to FIG. The driving load reducing means 900 of this example includes a shaft body 906 provided between the extending portion 311 of the first transparent plate 310 and the extending portion 331 of the third transparent plate 330, and the extension of the second transparent plate 320. A support member 905 provided at a main portion of the protruding portion 321 and an elastic member 907 (a coil spring in the illustrated example) that connects the shaft body 906 and the support member 905 are provided. The load on the driving unit 600 is reduced by the elastic member 907 urging the second transparent plate 320 upward with its elastic force. The drive load reducing means 900 can also be configured in this way.

  Next, a fourth embodiment of the present invention will be described with reference to FIG. The driving load reducing means 900 of this example is pivotally supported by a shaft body 908 provided between the extending portion 311 of the first transparent plate 310 and the extending portion 331 of the third transparent plate 330, and the shaft body 908. An insulator 909, a roller 910 provided at one end of the insulator 909 and in contact with the lower end of the extending portion 321 of the second transparent plate 320, and a weight 911 provided at the other end of the insulator 909. It is provided. The lower end of the extending portion 321 of the second transparent plate 320 has a predetermined shape that contacts the roller 910. The load on the driving unit 600 is reduced by canceling the load on the second transparent plate 320 and the load on the weight 911. The drive load reducing means 900 can also be configured in this way.

  Next, a fifth embodiment of the present invention will be described with reference to FIG. The driving load reducing means 900 of this example is pivotally supported by a shaft body 908 provided between the extending portion 311 of the first transparent plate 310 and the extending portion 331 of the third transparent plate 330, and the shaft body 908. An insulator 909, a roller 910 provided at one end of the insulator 909 and in contact with the lower end of the extending portion 321 of the second transparent plate 320, and a shaft body 912 provided at the other end of the insulator 909, The shaft body 913 provided on the support body 303 and the elastic body 914 connecting the shaft bodies 912 and 913 are provided. The load on the driving unit 600 is reduced by the elastic member 914 biasing the second transparent plate 320 upward by its elastic force. The drive load reducing means 900 can also be configured in this way.

  Next, a sixth embodiment of the present invention will be described with reference to FIGS. The transmission device 1 of this example includes a revolution stabilization means 1000 that stabilizes the revolution of the second transparent plate 320. The revolution stabilizing means 1000 shown in the figure is provided with a first sliding contact body 1001 and a second sliding contact body 1002 that are in sliding contact with the extending portion 321 of the second transparent plate 320, so that the second accompanying the revolution. The transparent plate 320 is configured to prevent subtle backlash. The first sliding contact body 1001 is supported by a boss 1008 provided on the extending portion 311 of the first transparent plate 310 or the extending portion 331 of the third transparent plate 330. On the other hand, the second sliding contact body 1002 is configured to urge the second transparent plate 320 to the first sliding contact body 1001 side by the elastic force of the elastic member 1003 (the illustrated example is a coil spring). The elastic member 1003 is accommodated in the cylinder 1004 supported by the extending portion 331 of the third transparent plate 330 or the extending portion 311 of the first transparent plate 310, and the second sliding contact body 1002 is the cylinder. It is supported by a rod 1005 provided so as to be movable with respect to 1004. The elastic force of the elastic member 1003 is adjusted by moving the position of the slider portion 1006 housed in the cylinder 1004. The slider portion 1006 sandwiches the elastic member 1003 between the rod 1005 and its position is configured to rotate by moving a male screw component 1007 screwed into the bottom of the cylinder 1004.

  Thus, the transmission device 1 of this example includes the revolution stabilization means 1000 that stabilizes the revolution of the second transparent plate 320. In the case of this example, since the second transparent plate 320 revolves in the vertical direction, when the second transparent plate 320 turns from ascending to descending or descending to ascending, due to the influence of backlash in the train wheel mechanism 620 and the like, A case where subtle backlash occurs on the second transparent plate 320 can be considered. The revolution stabilizing means 1000 prevents the second transparent plate 320 from rattling. It should be noted that the configuration of the revolution stabilizing means 1000 for stabilizing the revolution of the second transparent plate 320 can be appropriately changed in design, and is not limited to the illustrated example.

  For example, the revolution stabilizing means 1000 shown in FIG. 19 screws the plate-like metal first sliding contact body 1001 and the second sliding contact body 1002 having appropriate elasticity to the extending portion 321 of the second transparent plate 320. It will be. The revolution of the second transparent plate 320 is stabilized by the first sliding contact body 1001 and the second sliding contact body 1002 being pressed by the resin rod 1005 and the resin boss 1008. Since the first sliding contact body 1001 and the second sliding contact body 1002 are made of metal, there is no need to worry about their wear. The revolution stabilizing means 1000 can also be configured in this way.

  Next, a seventh embodiment of the present invention will be described with reference to FIGS. In the case of this example, the pivot shaft 502 of the roller 500 is provided fixed to the second transparent plate 320. The pivot shaft 502 is fitted with a cylindrical member 503 made of metal in a hole provided at an important point of the second transparent plate 320, and is inserted through the cylindrical member 503 and fixed by an E-ring 504. . A groove for fitting the E-ring 504 is provided at the main part of the constituent member of the pivot shaft 502. A washer 505 is interposed between the E-ring 504 and the second transparent plate 320. The roller 500 is supported via a bearing 506 on a rotary shaft 501 fixed to the first transparent plate 310 or the third transparent plate 330. Further, the roller 500 is provided with another bearing 507 that rotatably holds the pivot shaft 502 fixed to the second transparent plate 320. According to such a configuration, it is possible to surely smooth the revolution of the second transparent plate 320. There is no concern that the second transparent plate 320 is worn by the pivot shaft 502.

  Furthermore, in the case of this example, the pivot shaft 632 of the rotation drive unit 630 is fixed to the second transparent plate 320. The pivot shaft 632 is formed of a member in which a male screw and a flange are formed. The pivot shaft 632 is inserted into a hole provided in a main portion of the second transparent plate 320 and is fixed by screwing a female screw member 633. A bearing 634 is fixed to the pivot shaft 632, and a hole 635 for holding the bearing 634 is provided in the rotation drive unit 630. A pair of bearings 636 are mounted on the rotation shaft 631 of the rotation driving unit 630, and the bearings 636 are held by a support body 637 fixed to the third transparent plate 330. In addition, a disc 638 provided with a boss 638 a that engages with a predetermined disc 621 of the train wheel mechanism 620 is fixed to the base end of the rotation shaft 631 of the rotation drive unit 630. A bearing 639 is attached to the boss 638 a, and a hole 622 for holding the bearing 639 is provided in a predetermined disk 621 of the train wheel mechanism 620. The rotation drive unit 630 rotates as the disc 621 of the train wheel mechanism 620 rotates. Moreover, the hole 635 of the rotation drive member 630 has a long hole or an ellipse as appropriate (see FIG. 24). The hole 622 of the disc 621 of the train wheel mechanism 620 also has a long hole or an ellipse as appropriate (see FIG. 25). According to such a configuration, it is possible to reduce the rotational sliding load and the radial sliding load as much as possible when transmitting the driving force. That is, the transmission of the driving force can be reliably made efficient and stable.

  In the figure, 324 is a weight for adjusting the weight of the second transparent plate 320. The second transparent plate 320 may be provided with such a weight 324 at an appropriate part as necessary. The illustrated weight 324 is formed by abutting a metal plate from both sides to the center of the extension portion 321 and screwing it. The weight 324 also functions as a reinforcing member that reinforces the second transparent plate 320.

  As shown in FIG. 26 and FIG. 27, a member 350 having an L-shaped cross section is screwed to the first transparent plate 310 and the third transparent plate 330 so as to surround the time display unit 100. The L-shaped member 350 has a wall portion 351 rising from the first transparent plate 310 that blocks between the first transparent plate 310 and the second transparent plate 320, or a wall portion 351 rising from the third transparent plate 330 is the first. The space between the third transparent plate 330 and the second transparent plate 320 is closed. According to such an L-shaped member 350, it is possible to hide the edge of the second transparent plate 320, the reinforcing member 322, the roller 500, and the like so as to be hardly visible from the outside. From the viewpoint of preventing it from being seen from the outside, the inner surface of the L-shaped member 350, the reinforcing member 322, the roller 500, and the parts in the vicinity thereof may be black with a low gloss or a color close thereto. Furthermore, it is effective to appropriately color the end surface of the second transparent plate 320, the inner peripheral surface of the hole provided in the vicinity of the edge of the second transparent plate 320, and the like.

  The tip of the wall portion 351 of the L-shaped member 350 needs to be configured not to contact the second transparent plate 320. The second transparent plate 320 is supported by holding the pivot shaft 502 of the roller 500 and the pivot shaft 632 of the rotation driving unit 630. In this example, the second transparent plate 320 is rotated. In consideration of stability, a slight clearance is set in the support structure. Specifically, the second transparent plate 320 is slightly movable in the front-rear direction. Therefore, the distance between the tip of the wall 351 and the second transparent plate 320 needs to be set larger than the clearance. Further, assuming that a strong impact is applied to the transmission device 1, even if the distance between the tip of the wall portion 351 and the second transparent plate 320 is set in such a manner, they may come into contact with each other. . Therefore, in this example, the following second spacer 302 is provided on the second transparent plate 320.

  First, the second spacer 302 was provided at a position where the tip of the second spacer 302 was opposed to the L-shaped member 350. Further, the distance d1 between the tip of the second spacer 302 and the L-shaped member 350 is set to be larger than the moving range of the second transparent plate based on the clearance described above. The distance d2 between the tip of the wall 351 and the second transparent plate 320 was set to be larger than the distance d1 between the tip of the second spacer 302 and the L-shaped member 350. According to such a configuration, even if a strong impact is applied, the tip of the second spacer 302 comes into contact with the L-shaped member 350, so that the tip of the wall portion 351 and the second transparent plate 320 come into contact with each other. Avoided.

  In the second spacer 302, shafts 302a having male screws formed at both ends are inserted into holes provided at the main points of the second transparent plate 320 and the reinforcing member 322, and female screw portions are formed at both ends of the shaft 302a. The buffer body 302b is screwed together. That is, the reinforcing member 322 is used as a member that is attached to the edge of the second transparent plate 320.

  As shown in FIGS. 26 to 28, the reinforcing member 322 has its center fixed by the second spacer 302 and its both sides fixed by the pin 325 and the E ring 326. Holes 322a through which the pins 325 are inserted are provided at the important points of the second transparent plate 320 and the reinforcing member 322, and grooves for fitting the E-ring 326 are provided at the important points of the pins 325. .

  Here, in the case of this example, the hole portion of the reinforcing member 322 inserted through the shaft body 302a of the second spacer 302 has a size matching the shaft body 302a, while the hole of the second transparent plate 320 through which the pin 325 is inserted. The part 320a is longer than the hole 322a of the reinforcing member 322 in the longitudinal direction of the reinforcing member 322 (the arrow direction in FIG. 28).

  According to such a configuration, even if a dimensional difference is caused between the second transparent plate 320 and the reinforcing member 322 due to a difference in thermal expansion or the like, the pin 325 is inside the hole portion 320a of the second transparent plate 320. It is possible to absorb the dimensional difference by moving. The hole of the second transparent plate 320 that passes through the shaft body 302 a of the second spacer 302 serves as a reference for positioning the reinforcing member 322 with respect to the second transparent plate 320.

  That is, this is a dimensional difference absorbing means for absorbing a dimensional difference between the second transparent plate 320 and the reinforcing member 322. According to such a dimensional difference absorbing means, deformation such as warpage in the second transparent plate 320 can be more reliably prevented.

  Next, an eighth embodiment of the present invention will be described with reference to FIGS. As shown in these drawings, the transmission device 1 of this example includes a pointer driving mechanism 200, a first transparent plate 310, a second transparent plate 320, a third transparent plate 330, a first spacer 301, a second spacer 302, a roller. 500, the rotation drive unit 630, and the support body 303 are integrally assembled into a single unit, and the support body 303 is supported at the main part of the case body 700. Dimensional difference absorbing means for absorbing dimensional differences is provided. Other basic configurations are the same as those of the above-described embodiment.

  The support body 303 in this example is a U-shaped member that holds the entire lower end portion of the extending portion 311 of the first transparent plate 310 and the extending portion 331 of the third transparent plate 330. The above-described unit is maintained vertically by placing the lower surface of the support body 303 on the horizontal surface of the case body 700. The first spacers 301 that support the first transparent plate 310 and the third transparent plate 330 mutually have female screw portions at both ends, and these female screw portions are the first transparent plate 310 and the third transparent plate. It is exposed to the outside through holes provided at 330 important points. A plurality of first spacers 301 are provided at appropriate intervals below the extended portion 311 of the first transparent plate 310 and the extended portion 331 of the third transparent plate 330.

  The support body 303 is provided with a horizontal through hole 303 a penetrating the cylindrical body 304 at a position facing the first spacer 301. The length of the cylindrical body 304 is set to be slightly longer than the length of the through hole 303a. The first transparent plate 310 and the third transparent plate 330 are screwed by screwing the first bolt 305 inserted through the cylindrical body 304 into the female screw portion of the first spacer 301. According to such a structure, even if the 1st volt | bolt 305 is clamp | tightened firmly, the space | interval of the 1st transparent plate 310 and the 3rd transparent plate 330 does not change delicately.

  Further, in the main part of the support body 303, vertical female thread portions 303b are provided at appropriate intervals. The unit is fixed to the case body 700 by screwing the second bolt 306 inserted through the case body 700 into the female screw portion 303b. At this time, even if the second bolt 306 is firmly tightened, the force is absorbed by the support 303, so that the first transparent plate 311 and the third transparent plate 331 are not distorted.

  Here, in the case of this example, the hole 303 a of the support 303 that penetrates the cylindrical body 304 is the cylindrical body 304 except for the one that positions the support 303 with respect to the first transparent plate 310 and the third transparent plate 330. Is longer in the longitudinal direction of the support 303 (the arrow direction in FIG. 29). The hole 303 a for positioning the support 303 has a size that matches the cylindrical body 304. According to such a configuration, even if a dimensional difference is caused between the support body 303 and the case body 700 due to a difference in thermal expansion or the like, the cylindrical body 304 moves in the through hole 303a, so that It becomes possible to absorb the dimensional difference.

  That is, this is a dimensional difference absorbing means for absorbing a dimensional difference between the support body 303 and the case body 700. According to such a dimensional difference absorbing means, it is possible to prevent a situation in which a slight deformation of the case body 700 adversely affects the drive system of the transmission device 1.

  The transmission device of the present invention can be suitably used as a device for transmitting power to the pointer drive mechanism of the timepiece.

1 is a perspective view showing a transmission device 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 transmission. It is a see-through | perspective top view which concerns on the Example of this invention and shows a transmission. It is a see-through | perspective side view which concerns on the Example of this invention and shows a transmission. 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 side view which concerns on the Example of this invention and shows a transmission. 1 is a perspective view showing a transmission device according to an embodiment of the present invention. 1 is a perspective view showing a transmission device 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 drive load reduction means. It is a see-through | perspective front view which concerns on the Example of this invention and shows a drive load reduction means. It is a see-through | perspective front view which concerns on the Example of this invention and shows a drive load reduction means. It is a see-through | perspective front view which concerns on the Example of this invention and shows a drive load reduction means. It is a see-through | perspective front view which concerns on the Example of this invention and shows a drive load reduction means. It is a see-through | perspective side view which concerns on the Example of this invention and shows a revolution stabilization means. It is a see-through | perspective side view which concerns on the Example of this invention and shows a revolution stabilization means. It is a see-through | perspective front view which concerns on the Example of this invention and shows a 2nd transparent plate. It is a see-through | perspective side view which concerns on the Example of this invention and shows the principal part of a 2nd transparent plate. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective side view showing a main part of a transmission device, (b) a perspective side view showing a roller, and (c) a perspective front view showing the roller according to an embodiment of the present invention. It is a see-through | perspective side view which concerns on the Example of this invention and shows the principal part of a transmission. It is a front view which concerns on the Example of this invention and shows a rotation drive part. It is a front view which shows the disc of a wheel train mechanism concerning the Example of this invention. It is a see-through | perspective side view which concerns on the Example of this invention and shows the principal part of a drive means. It is a see-through | perspective side view which concerns on the Example of this invention and shows the principal part of a drive means. It is a front view which concerns on the Example of this invention and shows the principal part and reinforcement member of a 2nd transparent plate. It is a front view which concerns on the Example of this invention and shows a 1st transparent plate, a 3rd transparent plate, and a support body. It is a side sectional view showing an important section of a transmission concerning an example of the present invention. It is a side sectional view showing an important section of a transmission concerning an example of the present invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Transmission device 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 2nd spacer 302a Shaft body 302b Buffer body 303 Support body 303a Through hole 303b Female thread portion 304 Cylindrical body 305 First bolt 306 Second bolt 310 First transparent plate 311 Extension portion 312 Hole portion 313 Hole portion 320 Second transparent plate 320a 321 Extension part 322 Reinforcement member 322a Hole part 323 Bearing 324 Weight 325 Pin 326 E-ring 330 Third transparent plate 331 Extension part 340 Fourth transparent plate 350 L-shaped member 351 Wall part 400 Frame body 500 Roller 501 Rotating shaft 502 pivot shaft 503 cylindrical member 504 E ring 505 washer 506 bearing 507 bearing 600 drive means 610 movement 620 train wheel mechanism 621 disc 622 hole 630 rotation drive portion 631 rotation shaft 632 pivot shaft 633 female screw member 634 bearing portion 634 bearing 636 Bearing 637 Support body 638 Disk 638a Boss 639 Bearing 640 Needle alignment kana 700 Case body 710 Communication portion 800 Lock means 810 Second lock means 900 Drive load reduction means 901 Slide shaft 902 Weight 903 Pulley 904 String body 905 Support member 906 Shaft body 907 Elastic body 908 Shaft body 909 Insulator 910 Roller 911 Weight 912 Shaft body 913 Shaft body 914 Elastic body 1000 Revolution stabilization means 1001 First sliding contact body 1002 Second sliding contact body 1002 1003 Elastic member 1004 Cylinder 1005 Rod 1006 Slider part 1007 Male thread part 1008 Boss

Claims (2)

A transmission device for transmitting power to a driven part, a first transparent plate on which the driven part is drivably mounted, and a second transparent plate facing the first transparent plate and engaged with the driven part A drive unit that revolves the second transparent plate with respect to the first transparent plate, and the driven unit is driven in conjunction with the revolution of the second transparent plate.
A reinforcing member is provided at an edge of the second transparent plate to prevent deformation of the second transparent plate and to provide a dimensional difference absorbing means for absorbing a dimensional difference between the second transparent plate and the reinforcing member. A transmission device characterized by. A transmission device for transmitting power to a driven part, a first transparent plate on which the driven part is drivably mounted, and a second transparent plate facing the first transparent plate and engaged with the driven part A third transparent plate having the second transparent plate interposed between the first transparent plate and a driving means for revolving the second transparent plate with respect to the first transparent plate; In the transmission that is driven in conjunction with the revolution of the second transparent plate,
Providing a support for holding the first transparent plate and the third transparent plate;
The first transparent plate, the second transparent plate, the third transparent plate, the driven part, and the support body are integrally assembled as a unit, and the support body is supported by a case body,
The transmission device is provided with a dimensional difference absorbing means for absorbing a dimensional difference between the support body and the case body.

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