JP2010008354A - Transmission gear - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a transmission gear with brilliant decorativeness and reasonable constitution. <P>SOLUTION: In the device transmitting power to a driven section 200 including a first transparent board 310 on which the driven section 200 is loaded drivably, a second transparent board 320 engaging with the driven section 200 while facing to the first transparent board 310, and a driving means 400 revolving the second transparent board 320 around the first transparent board 310, where the driven section 200 is driven in conjunction with the revolution of the second transparent board 320: a third transparent board 330 is included to face to the second transparent board 320 and the driving means 400 makes to revolve the second transparent board 320 and the third transparent board 330 symmetrically and, by forcing the third transparent board 330 to revolve, variation is reduced of load of the driving means 400 concerned resulting from own weight of the second transparent board 320. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a transmission device with improved decorativeness.

In the transmission device used for decoration, the visual fun is important. For example, Patent Documents 1 to 3 disclose a timepiece in which a pointer is provided on a transparent plate and is 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.
JP 2006-284256 A JP 2006-126029 A JP 2005-54822 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. Therefore, further structural ingenuity is demanded in consideration of these various conditions.

  For example, when a predetermined transparent plate is revolved in the vertical direction, a load change occurs in the driving means due to the weight of the transparent plate. That is, the load on the driving means increases when the transparent plate is raised and decreases when the transparent plate is lowered. Therefore, in order to drive the driven part more stably, a configuration for dealing with such a change in load is required. In particular, when the driven part is a watch hand, it greatly affects the accuracy of time display, which is a very important issue.

  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 reasonably configured.

  The invention described in claim 1 of the present application is a device for transmitting power to a driven part, and a first transparent plate on which the driven part is drivably mounted, facing the first transparent plate and the driven part. A second transparent plate engaged with the portion, and a driving means for revolving the second transparent plate relative to the first transparent plate, wherein the driven portion is driven in conjunction with the revolution of the second transparent plate. The transmission device includes a third transparent plate facing the second transparent plate, and the driving means revolves the second transparent plate and the third transparent plate symmetrically, and revolves the third transparent plate. Thus, the transmission device has a configuration in which a change in the load of the driving unit due to the weight of the second transparent plate is reduced.

  The invention described in claim 2 of the present application is the transmission device according to claim 1, wherein the driven portion is a pointer driving mechanism for rotating a pointer of a timepiece.

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

  Embodiments of the present invention will be described below with reference to FIGS. The transmission device 1 of this example shown in these drawings transmits power to a pointer drive mechanism 200 as a driven portion. The pointer drive mechanism 200 is a train wheel mechanism that rotates the hour hand 210 and the minute hand 220 at respective predetermined speeds.

  And the time display part 100 which has arrange | positioned the pointer drive mechanism 200 is transparent, and it has the structure which can see through from the near side from the near side of the transmission device 1, and the near side from the far 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 as a driven portion, a first transparent plate 310 on which the pointer driving mechanism 200 can be driven, and a first transparent plate 310 facing the first transparent plate 310 and engaging with the pointer driving mechanism 200. 2 transparent plate 320 and drive means 400 that revolves the second transparent plate 320 relative to the first transparent plate 310, and the pointer drive mechanism 200 is driven in conjunction with the revolution of the second transparent plate 320. .

  Further, in the case of this example, as a feature thereof, the third transparent plate 330 facing the second transparent plate 320 is provided, and the driving unit 400 revolves the second transparent plate 320 and the third transparent plate 330 symmetrically. By revolving the three transparent plates 330, the change in the load of the driving means 400 due to the weight of the second transparent plate 320 is reduced.

  When only the second transparent plate 320 is configured to revolve, the load on the driving unit 400 increases when the second transparent plate 320 rises and decreases when the second transparent plate 320 descends. Therefore, the same type of third transparent plate 330 having the same weight is revolved simultaneously with the second transparent plate 320 to reduce the change in the load of the driving means 400 and to stabilize the driving of the driven portion 200. Yes.

  In the drawing, reference numeral 500 denotes a frame 500 that covers the moving region of the edge of the second transparent plate 320 and the third transparent plate 330. The revolutions of the second transparent plate 320 and the third transparent plate 330 cannot be recognized from the outside.

  The second transparent plate 320 and the third transparent plate 330 face each other with the fourth transparent plate 340 interposed therebetween. Further, a fifth transparent plate 350 is provided on the front surface of the frame body 500, and a sixth transparent plate 360 is provided on the back surface. The first transparent plate 310, the fourth transparent plate 340, the fifth transparent plate 350, and the sixth transparent plate 360 are supported by the frame body 500 at their edges.

  The second transparent plate 320 is disposed between the first transparent plate 310 and the fourth transparent plate 340, and the third transparent plate 330 is disposed between the fourth transparent plate 340 and the sixth transparent plate 360. Yes. The first transparent plate 310 and the fourth transparent plate 340 are provided with spacers 311 and 341 that regulate the distance from the second transparent plate 320 at appropriate intervals. In addition, the fourth transparent plate 340 and the sixth transparent plate 360 are provided with spacers 342 and 362 that regulate the distance from the third transparent plate 330 at appropriate intervals. Each spacer 311, 341, 342, 362 is covered by the frame body 500 and is not visible from the outside.

  Each of the transparent plates 310, 320, 330, 340, 350, and 360 is a transparent or translucent plate made of glass or resin.

  The time display unit 100 is a part surrounded by a frame 500. Any one of the first transparent plate 310, the fourth transparent plate 340, the fifth transparent plate 350, and the sixth transparent plate 360 is provided with a time indicator portion 101.

  The frame body 500 is attached to the upper part of the pedestal 600. The driving means 400 is housed inside the pedestal 600.

  The driving unit 400 of this example is rotatably mounted on the fourth transparent plate 340 and the motor 410, the train wheel 420 provided at the lower part of the fourth transparent plate 340 and connected to the output gear 411 of the motor 410. And a plurality (two in the illustrated example) of rotation output units 430 that follow the train wheel 420. The rotation output units 430 pivotally support the second transparent plate 320 and the third transparent plate 330, respectively. The power of the motor 410 is transmitted to the rotation output unit 430 through the train wheel 420, and the rotation output unit 430 is the second output. The transparent plate 320 and the third transparent plate 330 are operated to revolve them symmetrically. The frame 500 and the pedestal 600 are configured so that the driving unit 400 cannot be seen from the outside.

  The plurality of rotation output units 430 are synchronously rotated at a predetermined speed by the train wheel 420. These rotation output portions 430 are provided with a first pin 431 that pivotally supports the second transparent plate 320 and a second pin 432 that pivotally supports the third transparent plate 330, respectively. 432 has the same turning radius. Further, the first pin 431 and the second pin 432 are 180 ° out of phase with the rotation axis of the rotation output unit 430.

  That is, the second transparent plate 320 and the third transparent plate 330 have the same revolution period and are shifted by 1/2, and are rotationally symmetric with each other by 180 °. The timings of ascending / descending and left / right movement are always opposite. FIG. 3 shows the positional relationship when the second transparent plate 320 changes from rising to lowering, that is, when the third transparent plate 330 changes from lowering to rising. FIG. 4 shows the positional relationship when the second transparent plate 320 is lowered from the state of FIG. 3, that is, when the third transparent plate 330 is raised.

  The pointer drive mechanism 200 includes a rotation input unit 230 that is provided rotatably with respect to the first transparent plate 310 and is provided with a third pin 231 that pivotally supports the second transparent plate 320. The third pin 231 has the same radius of rotation as the first pin 431 and the second pin 432.

  The specific configuration of the pointer drive mechanism 200 is not particularly limited, but in this example, the minute hand pipe that supports the minute hand 220 and rotates synchronously with the rotation input unit 230, and the reverse side that decelerates the rotation of the pointer pipe. It includes a vehicle and an hour hand pipe provided with a gear that supports the hour hand 210 and meshes with the date wheel. The revolution cycle of the second transparent plate 320 and the third transparent plate 330 is 1 hour, and the rotation cycle of the minute hand 220 is also 1 hour. The rotation cycle of the hour hand 210 is 12 hours.

  The positional relationship among the first pin 431, the second pin 432, the third pin 231, and the spacers 311, 341, 342, and 362 may cause the second transparent plate 320 and the third transparent plate 330 to revolve. It is set not to be.

  According to the transmission device 1 of this example described above, the weight of the second transparent plate 320 and the weight of the third transparent plate 330 are canceled out, so that the change in the load of the driving unit 400 is reliably reduced. Thus, the transmission device 1 of the present example is excellently decorated and rationally configured, and can be suitably used as a device for driving the hands 210 and 220 of the timepiece.

  In addition, it is needless to say that 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 not limited to that illustrated in the drawings. For example, the shapes of the frame 500 and the transparent plates 310, 320, 330, 340, 350, and 360 are not limited to rectangles, and various forms are conceivable.

  Further, the driving means 400 of this example revolves the two transparent plates so as to be 180 ° rotationally symmetric with each other, or can be configured to revolve the three transparent plates. It is. In that case, they are revolved so that they have a rotational symmetry of 120 ° with respect to each other.

  Furthermore, although the transmission device 1 of this example drives the hour hand 210 and the minute hand 220, the second hand can be further driven by rotating the second transparent plate 320 once per minute or the like. Is possible.

  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 automatic correction timepiece, a receiving means for receiving time information, a microcomputer storing a predetermined program for controlling the motor 410, and the like are provided.

  Further, the driven part can be configured to drive a decorative ornament in addition to the pointer driving mechanism 200. 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.

  Further, a second transparent plate 320 and a third transparent plate 330 are provided before and after the first transparent plate 310, respectively, and one or more driven parts are configured to be driven by the plurality of second transparent plates 320. Is also possible. In such a case, by setting the revolution speed and revolution magnitude of each second transparent plate 320 to be different from each other, it is possible to obtain a more complicated driving form of the driven part.

  The transmission device of the present invention can be suitably used as a device for driving the hands of a timepiece.

It is a front view which concerns on the Example of this invention and shows a transmission. 1 is a side sectional view showing a transmission device according to an embodiment of the present invention. It is explanatory drawing which concerns on the Example of this invention and shows the principal part of a transmission. It is explanatory drawing which concerns on the Example of this invention and shows the principal part of a transmission.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Transmission device 100 Time display part 101 Index part 200 Pointer drive mechanism (driven part)
210 Hour hand 220 Minute hand 230 Rotation input unit 231 Third pin 310 First transparent plate 311 Spacer 320 Second transparent plate 330 Third transparent plate 340 Fourth transparent plate 341 Spacer 342 Spacer 350 Fifth transparent plate 360 Sixth transparent plate 362 Spacer 400 Driving means 410 Motor 411 Output gear 420 Train wheel 430 Rotation output unit 431 First pin 432 Second pin 500 Frame body 600 Base

Claims (2)

A device for transmitting power to the driven part, a first transparent plate on which the driven part is drivably mounted; 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, wherein the driven portion is driven in conjunction with the revolution of the second transparent plate;
A third transparent plate facing the second transparent plate;
The drive means revolves the second transparent plate and the third transparent plate symmetrically, and changes the load of the drive means due to the weight of the second transparent plate by revolving the third transparent plate. A transmission device characterized by reducing the noise.   The transmission device according to claim 1, wherein the driven portion is a pointer driving mechanism that rotates a pointer of a timepiece.

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