JP2006258437A - Display device of clock, and clock - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a display device of a clock for displaying and the clock provided with the same capable of retrospective representation simplified in structure, excellent in spatial efficiency, and improved in degree of freedom of designing. <P>SOLUTION: The day of the week display 20 of the clock 1 in which the week pointer 52 is provided with the shaft part 431 of the lever 43, the reciprocating motion of the week pointer 52 interlinking with the turning/returning action of the lever 43 is achieved by turning of the lever 43 is directly transferred to the week pointer 52, therefore, transfer mechanism such as a rack for transferring the turning of the lever 43 to the week pointer 52 can be negated. Because, the mechanism for transferring the turning of the lever 43 is negated, the structure of the week display device 20 can be simplified, and the space saving and lowering the cost can be attained, i.e. the week display device 20 is achieved with the retrospective reciprocating motion of the week pointer 52 with only the cam 42 and the lever 43, and the configuration of the same can be made simple and compact. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a display device for a retro-style clock that displays a calendar and time such as month, day, and day of the week on a fan-shaped display unit, and a clock.

Conventionally, with regard to a clock that displays a calendar, a ring-shaped rotating plate (date wheel, day wheel) for displaying a calendar has been adopted, and printed along the circumference of the rotating plate. The calendar was displayed by displaying characters such as Sun to Sat sequentially from the window of the dial.
On the other hand, there is also known a retro-grade (retrograde) clock display mechanism in which scales such as days, days of the week, hours and minutes are drawn on a fan-shaped display on a dial plate, and the calendar and time are indicated by hands. In this retro style type clock, taking the day of the week display as an example, the hands sequentially advance to Sun, Mon, Tue,... In order to realize such a reciprocating movement of the pointer, in Patent Document 1, with respect to date display, the outer peripheral shape of a conventional ring-shaped date wheel provided on the back side of the main plate (however, there is no date printing) is spiral. It has been proposed to use this as a cam. Specifically, in the timepiece of Patent Document 1, a pinion to which a pointer is attached and a pair of racks that mesh with the pinion from opposite directions are rotatably attached to the main plate. The other rack is in contact with the outer periphery of the rotating plate as a cam by spring pressing through one rack, and the pointer reciprocates according to the rotation of the date dial.

JP 11-6880 A ([Claim 2] [0002] [0016], FIG. 3)

However, in the configuration using the conventional date dial as in Patent Document 1, the outer circumference of the movement is occupied by the date dial, so that the space limitation is large. And since it is necessary to arrange | position the components of a movement inside the inner periphery of a date dial, a structure will be complicated. Therefore, if it is going to implement | achieve the structure of patent document 1 in the existing movement, a big design change will be needed and product development cannot be accelerated | stimulated. In particular, the complexity of the structure becomes a significant problem when adding a retro-style display that displays the day of the week, the month, etc. in addition to the day, or an in-dial display such as a 24-hour display, small seconds, chronograph, etc. .
Further, in the configuration of Patent Document 1, there is a design restriction such that the date indicator can be provided only in the direction pointing the inside from the outer peripheral side of the date dial.

  In view of these problems, an object of the present invention relates to a timepiece that performs a retro-style display, which has a simplified structure, is excellent in space efficiency, and can greatly improve design freedom. An object of the present invention is to provide a display device and a timepiece including the display device.

  The display device for a timepiece according to the present invention includes a driving vehicle that is rotated by a power source, a driven vehicle that is driven by the driving vehicle, a cam that is rotated via the driven vehicle, and a rotation that is in contact with the cam. It is characterized by comprising a possible lever, an indicating member which is provided coaxially with the rotation axis of the lever and rotates, and a fan-shaped display portion indicated by the rotation of the indicating member.

  According to the present invention, a retro-type display mechanism is provided by a driving vehicle, a driven vehicle, a cam, a lever, and the like. As an operation of the display mechanism, first, the driven vehicle is rotated by a feed amount according to the purpose of display, such as day, month, day of the week, etc., by the driving force of the driving vehicle. Next, when the cam rotates through the driven vehicle, the lever that contacts the cam rotates. Then, the indicator member provided on the pivot shaft of the lever rotates from one end side to the other end side of the fan-shaped display unit, and the calendar or time is indicated in order by this indicator member. Become. Further, when the indicating member reaches the other end of the display unit, the indicating member returns to one end side of the display unit by the return of the lever accompanying the end of the cam cycle. By such reciprocating movement of the indicating member, a calendar such as day, month, day of the week, or time is repeatedly displayed.

Here, in the present invention, it is possible to appropriately combine components having a simple structure such as a driving vehicle, a driven vehicle, a cam, a lever, and an indicating member, and the driving vehicle, the driven vehicle, the cam, the lever, etc. can be arranged without difficulty. Thus, a simple structure can be obtained.
Further, in the present invention, since the indication member is provided on the shaft portion of the lever and the rotation of the lever is directly transmitted to the indication member to realize the reciprocating operation of the indication member, the rotation of the lever is transmitted to the indication member. This eliminates the need for a feed mechanism such as a rack. As described above, since the pointing member is interlocked with the pivoting / returning operation of the lever and a mechanism for transmitting the pivoting of the lever is not required, the structure can be further simplified, and the space can be saved and the cost can be reduced. Can also be achieved. That is, the present invention realizes a retro-style hand movement (reciprocating movement of the indicating member) only by a cam and a lever that are rotated by a predetermined feed amount, and can have a very simple and compact configuration.
In this way, the structure is simple and the design is easy.For example, a multi-system retro tone display such as a day display and a day display is adopted, or an in-dial display and a retro tone display such as a chronograph are adopted. The degree of freedom of design can be greatly improved.
Further, the position and orientation of the indication member can be freely set depending on the combination of the driving vehicle, the driven vehicle, the cam, the lever and the like.

In the timepiece display device according to the present invention, it is preferable that the timepiece is provided with an urging means for urging the lever in a state of being in contact with the cam.
According to the present invention, since the lever is reliably brought into contact with the urging means without being separated from the cam, rattling of the lever, the indicating member, and the like can be prevented, and the indicating member can be moved accurately.
Note that the action of the timepiece display device is that the urging force of the urging means against the lever accumulates as the lever rotates away from the center of rotation of the cam, and the lever moves in the reverse direction at the end of the cam cycle. By returning and releasing the urging force of the urging means, the indicating member can be instantaneously returned.

In the timepiece display device of the present invention, the driving wheel is an hour wheel to which an hour hand is attached, and an intermediate wheel having a feed claw for feeding the driven wheel is provided between the hour wheel and the following wheel. It is preferable that
According to this invention, since the hour wheel which is normally provided in the timepiece and uses the hour wheel constituting the time display mechanism is utilized as the driving wheel, the driving force from the hour wheel is reliably transmitted to the intermediate wheel and the driven wheel, and the design efficiency is also improved. Can be good.
In addition, since the intermediate wheel is provided, a reduction gear train is configured that is decelerated by half between the hour wheel and the intermediate wheel and gradually decreases to the hour wheel, the intermediate wheel, and the driven wheel. Can be downsized without increasing the size of the apparatus. Furthermore, the follower can be instantaneously sent one tooth at a time by the feed pawl of the intermediate wheel.

In the timepiece display device of the present invention, it is preferable that the rotating shaft of the cam and the rotating shaft of the follower are arranged coaxially, and a part of the lever overlaps the cam.
According to the present invention, since the cam and the driven vehicle overlap and a part of the lever overlaps with the cam, the space in the plane direction (direction intersecting the watch viewing direction) can be reduced, and the display device can be incorporated. Can be improved. It is preferable that the lever overlaps with the driving vehicle, the driven vehicle, and the intermediate vehicle.
In addition, since the cam and the driven vehicle are coaxial, the rotation of the driven vehicle can be reliably transmitted to the cam.

  In the timepiece display device of the present invention, the driving wheel, the driven wheel, and the cam are pivotally supported between a main plate and a plate member facing the main plate, and the lever includes a shaft portion and the shaft portion. A plate-like main body provided separately from each other, and the shaft portion is pivotally supported by the base plate and a tip portion protrudes from a shaft hole formed in the plate member. It is preferable that the shaft portion is attached to the shaft portion from the side opposite to the base plate, and a part thereof is bent toward the base plate side to pass through an opening formed in the plate member and contact the cam.

According to the present invention, the shaft portion of the lever and the main body are separated from each other, and the main body of the lever is disposed at a position different from the position where the driving wheel, the driven wheel, and the cam are disposed in the thickness direction of the timepiece. Therefore, by arranging the shaft portion of the lever close to the driving vehicle, the driven vehicle, etc., it is possible to improve the assemblability and space efficiency. As an assembling order, it is appropriate to provide a plate member on the shaft portion, attach the main body to the shaft portion protruding from the plate member, and finally attach the indicating member to the shaft portion.
In addition, since the lever is formed in a plate shape and a part that abuts the cam is secured by bending a part of the lever, the movement can be made thin.

A timepiece according to the present invention includes the display device described above.
According to the present invention, since the display device has the operations and effects as described above, the same operations and effects can be enjoyed.

  According to the present invention as described above, a timepiece that performs retro-style display, a simple and space-saving structure, a timepiece display device that can be freely laid out and designed, and a timepiece equipped with this display device. Can be provided.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is an external view of a timepiece 1 according to the present embodiment.
The timepiece 1 is a wristwatch (watch) including a movement (clock body) 2 that is a driving device and a case 3 that accommodates the movement 2. The type of timepiece may be any of a quartz timepiece, a mechanical timepiece, and an electronically controlled mechanical timepiece. However, the timepiece 1 of this embodiment is configured as an analog quartz timepiece, and the movement 2 includes a dial 11 and a crown 13. Is attached. On the dial plate 11, time (hour minute second), day of the week, day, and hour (24 hour system) are displayed. That is, a second hand 121, a minute hand 122, and an hour hand 123 are provided at the approximate center of the dial plate 11 as a time display configuration. Further, a fan-shaped display unit 51 is provided at 9 o'clock side from the center of the dial plate 11, and the display of the display unit 51 is of a retro style in which the day hand 52 reciprocates. Further, in the 3 o'clock direction and the 6 o'clock direction, circular display portions 65 and 75 are provided, respectively. In these display portions 65 and 75, the date hand and hour (24 hours) System) is displayed.

FIG. 2 is a plan view of the movement 2 as viewed from the dial 11 side, and FIG. 3 is a cross-sectional view of the main part of the movement 2. In FIG. 2, the presser 24 and the receiver 25 are not shown.
Here, the configuration for driving the second hand 121, the minute hand 122, and the hour hand 123 is the same as that of a normal analog quartz, and includes a circuit board in which a crystal unit is incorporated, a stepping motor having a coil, a stator, and a rotor. 3, a driving wheel train (including a sun wheel, third wheel, fifth wheel, etc. not shown) by the fourth wheel 114, second wheel 112, hour wheel 31 and the like shown in FIG. And a battery. In this configuration, the stepping motor is driven by a pulse signal that is oscillated by a crystal resonator and divided by a circuit block. Then, the driving force of the stepping motor is transmitted to the drive wheel train through the rotor, so that the second hand 121 provided in the fourth wheel 114, the minute hand 122 provided in the second wheel 112, and the hour wheel 31 The hour hand 123 provided is driven. Note that the number of stepping motors is not limited, and for example, two stepping motors may be provided, one for driving the second hand 121 and one for driving the minute hand 122 and hour hand 123.

Next, the structure of the day display device 60 and the structure of the 24-hour display device 70 will be described.
As shown in FIG. 2, the movement 2 includes a date display device 60 related to date display, a 24-hour display device 70 related to 24-hour display, and a day display device 20 related to retro-style day display described later. It has been incorporated.

The date display device 60 includes an hour wheel 31, a date indicator driving wheel 62, a date star wheel 63, a date hand 66, and a display unit 65 (FIG. 1) disposed in the center of the main plate 23 having a substantially circular shape in plan view. It is configured with.
The hour wheel 31 is a sleeve-like gear that rotates once in 12 hours, and an hour hand 123 (FIG. 1) is attached to the hour wheel 31. The hour wheel 31 has a feed wheel 311 with 8 teeth, and this feed wheel 311 is meshed with the date indicator driving wheel 62.

  The date indicator driving wheel 62 decelerates the rotation of the hour wheel 31 by half and makes one rotation in one day (24 hours). The date indicator driving wheel 62 includes a date indicator transmission wheel 621 (back side in FIG. 2) having 16 teeth meshed with the hour wheel 31 and a date indicator driving wheel 622 (front side in FIG. 2) having 24 teeth. It is a laminated structure. Here, a feeding claw 621A is formed in the date turning transmission wheel 621, and the date star wheel 63 is fed one tooth per day by the feeding claw 621A.

The date star wheel 63 has 31 teeth and rotates once in 31 days. A date hand 66 is attached to the date star wheel 63, and the date is displayed by the rotation of the date hand 66 in the display unit 65 (FIG. 1).
The teeth of the date star wheel 63 are urged by the tip of a jumper (not shown) attached to the main plate 23 on the base end side. The date hand 66 is intermittently driven by the urging force of the jumper.

On the other hand, the 24-hour display device 70 includes the hour wheel 31 and the date indicator driving wheel 62, the small star wheel 73, the 24-hour hand 76, and the display unit 75 (FIG. 1).
The hour wheel 31 and the date indicator driving wheel 62 have a configuration common to the 24-hour display device 70 and the date display device 60.

  The small star wheel 73 has 24 teeth and is rotated once a day by meshing with the date driving wheel 622. A 24-hour hand 76 is attached to the small star wheel 73, and the 24-hour time is displayed by the rotation of the 24-hour hand 76 on the display unit 75 (FIG. 1).

Next, the most characteristic structure of the day display device 20 in the present embodiment will be described in detail.
FIG. 4 is an enlarged view of a main part of FIG. Here, the presser 24 shown in FIG. 4 is screwed to the base plate 23 (FIG. 2) at two locations, and presses the components of the day display device 20 between the base plate 23.
3 and 4, the day display device 20 includes a gear train 30 that transmits a driving force, a control unit 40 that receives the driving force from the gear train 30 and reciprocates the day hand 52 serving as an indicating member, and a display. An instruction unit 50 including a unit 51 and a day hand 52 is provided.

The gear train 30 includes the above-described hour wheel 31 as a driving wheel and a day indicator driving wheel 32 as an intermediate wheel that meshes with the hour wheel 31.
The hour wheel 31 has a configuration common to the 24-hour display device 70, the day display device 60, and the day display device 20, and a description thereof is omitted here. A feed wheel 311 (8 teeth) of the hour wheel 31 is in mesh with the day-turn wheel 32.

  The day indicator driving wheel 32 decelerates the rotation of the hour wheel 31 to 1/2 and makes one rotation per day, and transmits the driving force of the hour wheel 31 to the control unit 40. The day indicator driving wheel 32 has a number of teeth set to 16 and has a feeding claw 321 for feeding the day intermediate wheel 41. The day claw wheel 41 is fed by one tooth per day by the feeding claw 321.

  The control unit 40 includes a day intermediate wheel 41 as a driven vehicle, a cam 42, and a rotatable lever 43 that is biased by a spring 46 while being in contact with the cam 42. .

  The day intermediate wheel 41 is rotated by the driving force received from the day indicator driving wheel 32. The number of teeth is set to 7, and the wheel rotates once in 7 days (1 week). A jumper 411 is provided in the vicinity of the day intermediate wheel 41 to urge the teeth of the day intermediate wheel 41. Due to the urging force of the jumper 411, the day intermediate wheel 41 is driven intermittently.

  The cam 42 is a flat cam that rotates once in 7 days together with the day intermediate wheel 41. As shown in FIG. 3, the cam 42 is coaxial with the day intermediate wheel 41 between the main plate 23 and the presser 24 facing the same. And it is provided integrally. Since the cam 42 and the day intermediate wheel 41 are thus coaxial, the rotation of the day intermediate wheel 41 can be reliably transmitted to the cam 42. As shown in FIG. 4, the cam 42 is provided with one peak portion 421, and the start end portion 422 to the peak portion 421 are formed in an Archimedean spiral shape. The follower of such a cam 42 is a lever 43.

The lever 43 includes a shaft portion 431 and a thin plate-like main body 432 provided on the shaft portion 431.
The shaft portion 431 is pivotally supported by a receiver 25 (FIG. 3) provided on the base plate 23 in the vicinity of the shaft portion 322 of the day indicator driving wheel 32 and the shaft portion 412 of the day intermediate wheel 41, and the tip end portion of the shaft portion 431. 431A protrudes from the presser 24 and the dial 11 as plate members. The main body 432 and the day hand 52 are attached to the tip portion 431A. As an assembling procedure, the presser 24 is disposed on the hour wheel 31 supported on the main plate 23, the day indicator driving wheel 32, the day intermediate wheel 41, the shaft portion 431 supported on the support 25, and the like. After attaching the main body 432 to the tip portion 431A of the shaft portion 431 protruding from the 24 shaft hole 243 (FIG. 3), the day hand 52 is attached to the tip portion 431A.
Note that the tip portion 431A of the shaft portion 431 has a straight portion 431B formed in a part of the cross-sectional shape, and the main body 432 is fixed around the shaft of the tip portion 431A by this straight portion 431B.

The main body 432 is a thin plate-like member having a hole 432C (FIG. 3) with which the tip portion 431A of the shaft portion 431 is engaged, and at the position between the day indicator driving wheel 32 and the day intermediate wheel 41, the day of the week. The rotating wheel 32, the day intermediate wheel 41, and the hour wheel 31 are arranged well.
Although the shape of the main body 432 is not limited to the illustrated shape, in the present embodiment, the main body 432 has a substantially oval shape with the shaft portion 431 as one end side of the long axis, and a convex portion 432A protruding in a direction intersecting the long axis. Is formed.
The convex portion 432A is bent substantially perpendicularly to the base plate 23 side so as to penetrate the opening 241 formed in the presser 24. The bent portion 432B is in contact with the cam 42, and a planar portion of the main body 432 in the vicinity of the bent portion 432B is an overlapping portion 432D that overlaps the cam 42.
The spring 46 is a torsion coil spring, and is locked around the shaft portion 244 between the protruding portion 242 formed on the presser 24 and the main body 432 of the lever 43. By this spring 46, the lever 43 is urged toward the cam 42 from a position away from the shaft portion 431.

On the other hand, the instruction unit 50 includes a day hand 52 attached to the shaft portion 431 of the lever 43 and a fan-shaped display unit 51 (FIG. 1) on the dial 11.
As shown in FIG. 1, the display unit 51 is provided so that the fan-shaped circle center O is located on the 9 o'clock side of the dial 11 center, and is widened from the circle center O toward the approximately 12:00 direction. Is provided. Characters “SUN” to “SAT” are printed at predetermined intervals along the fan-shaped arc of the display unit 51, and this is a scale 511 indicating the day of the week.

The configuration of the timepiece 1 has been described above. Next, the operation of the day display device 20 will be described.
The driving force of the stepping motor is transmitted to the hour wheel 31 via a driving wheel train (not shown), and the hour wheel 31 makes one rotation in 12 hours, that is, two times a day. The rotation of the hour wheel 31 is decelerated by half when it is transmitted from the hour wheel 31 to the day turning wheel 32, and the day turning wheel 32 makes one rotation per day. Then, the day intermediate wheel 41 is fed one tooth at a time by the feed claws 321 of the day turning wheel 32. The driving force transmitted to the day intermediate wheel 41 is transmitted after being reduced to 1/7 based on the rotational speed of the day driving wheel 32.
The rotation of the day intermediate wheel 41 is also transmitted to the cam 42 via the day intermediate wheel 41, and the cam 42 and the day intermediate wheel 41 as a whole rotate once in seven days (one week).

  Next, the cam 42 and the lever 43 constitute the control unit 40, and the lever 43 is rotated by the rotation of the cam 42, and the day hand 52 attached to the shaft portion 431 of the lever 43 is a display unit. At 51, the hand is moved. FIG. 5 is a view showing the operations of the cam 42, lever 43, and day hand 52. Specifically, as shown in FIG. 5A, the lever 43 is gradually brought into contact with the start end 422 of the cam 42 at the bent portion 432B by the rotation of the cam 42, as shown in FIG. As shown in FIG. 4, the lens rotates in the forward direction (here, counterclockwise). By the rotation of the lever 43, the day hand 52 provided on the shaft portion 431 is also rotated, and the scale 511 of the display unit 51 is sequentially indicated by the day hand 52. At this time, the bending amount (spring force) of the spring 46 (FIG. 4) is accumulated as the lever 43 rotates.

  Thus, as shown in FIG. 5C, when the day hand 52 has advanced to the end position 511B (FIG. 1) of the scale 511 of the display unit 51, the convex portion 432A of the lever 43 overlaps with the peak portion 421 of the cam 42. The bent portion 432B is in contact with the outer peripheral side of the cam 42. When the day intermediate wheel 41 is next sent by the feed claw 321 (FIG. 4) in this state, the day intermediate wheel 41 rotates. Accordingly, the cam 42 rotates and the cycle of the cam 42 ends. At the end of the cycle of the cam 42, the bent portion 432B moves away from the outer peripheral portion of the cam 42, and the contact portion between the bent portion 432B and the cam 42 starts from the peak portion 421 by the spring force accumulated in the spring 46. While moving to the part 422 instantaneously, the lever 43 rotates rightward in FIG. 5C and returns to the state indicated by the two-dot chain line. By the reverse rotation of the lever 43, the day hand 52 returns (returns to zero) to the start position 511A of the scale 511 of the display unit 51. Then, the next cycle of the cam 42 starts, and the reciprocating motion of the day hand 52 is performed in a 7-day cycle by repeating the rotation and return operation of the lever 43 according to the rotation of the cam 42 as described above. .

According to the present embodiment described above, there are the following effects.
(1) In the day display device 20 of the timepiece 1, the day hand 52 is provided on the shaft portion 431 of the lever 43, and the rotation of the lever 43 is directly transmitted to the day hand 52 to realize the reciprocating operation of the day hand 52. Therefore, a feed mechanism such as a rack for transmitting the rotation of the lever 43 to the day hand 52 can be eliminated. In this way, the day hand 52 is interlocked with the turning / returning operation of the lever 43, and a mechanism for transmitting the turning of the lever 43 is not required. Therefore, the structure can be simplified, and space saving and cost reduction are achieved. Is also planned. That is, the day-of-the-week display device 20 is a retro-type hand movement realized by only the cam 42 and the lever 43 that are rotated by a predetermined feed amount, and its configuration is simple and compact.

(2) The day display device 20 is composed of gears such as the hour wheel 31 and the day intermediate wheel 41, and simple parts such as the cam 42 and the lever 43, and these parts are arranged in the space of the main plate 23 without difficulty. In this respect, the structure of the retro-style day display device 20 can be simplified. Therefore, the day display device 20 can be easily designed and assembled, and the quality can be stabilized. Moreover, since the structure is not complicated, it is easy to provide a model with a reduced size for women.

(3) Since the structure of the day display device 20 is simple, the structure of the entire movement 2 is not complicated even if the day display device 60 and the 24-hour display device 70 are provided, and the day display and month display are performed. The multifunction timepiece 1 having the functions of 24-hour display and time (hour / minute / second) display can be provided at low cost. In addition, the degree of design freedom can be greatly improved.

(4) Since the cam 42 overlaps the day intermediate wheel 41 and the overlapping portion 432D of the lever 43 overlaps the cam 42, the cam 42, day intermediate wheel 41, and lever 43 are arranged in a well-organized manner, and the day display Assembling property of the apparatus 20 and planar space efficiency can be improved. Further, the cam 42 is accommodated in the planar area occupied by the day intermediate wheel 41, and the lever 43 is accommodated in the planar area occupied by the day intermediate wheel 41 and the day turning wheel 32, respectively, or protrudes greatly from the area. Therefore, the space occupied by the ground plane 23 of the day display device 20 is almost the same as the space occupied by the circular in-dial display for rotating the hands. Therefore, in the existing movement, the configuration of the in-dial display can be easily replaced with the retro-style day display device 20.

(5) The shaft portion 431 of the lever 43 and the main body 432 are made of different members, and the main body 432 of the lever 43 is disposed on the presser 24 so that the main body 432 of the lever 43 is in the thickness direction of the timepiece 1. Are arranged at positions different from the positions at which the hour wheel 31, day intermediate wheel 41, and cam 42 are arranged, so that the shaft portion 431 of the lever 43 is arranged close together with the hour wheel 31, day intermediate wheel 41, etc. By doing so, the embeddability and space efficiency can be improved.

(6) Since the hour wheel 31 that commonly configures the day display device 20, the day display device 60, and the 24-hour time display device 70 is used as a driving vehicle, the driving force from the hour wheel 31 is set to the day turning wheel 32, It is reliably transmitted to the day intermediate wheel 41 and the design efficiency can be improved.

[Modification]
The present invention is not limited to the embodiment described above. That is, the present invention has been illustrated and described primarily with respect to particular embodiments, but without departing from the spirit and scope of the present invention relative to the embodiments described above. Various modifications may be made by those skilled in the art in terms of shape, material, quantity, and other detailed configurations.

  In the above embodiment, the position of the rotation center of the day hand 52, the rotation angle, the pointing direction, and the sector-shaped circle center O and the sector-shaped angle of the display unit 51 are exemplified. The position, the rotation angle, the pointing direction, the position of the sector center of the display unit, the sector angle, etc. can be arbitrarily configured.

  For example, like the timepiece 8 shown in FIG. 6, the center of rotation of the day hand 82 is provided at the 10:30 position, and the fan-shaped display portion 81 extends from the circle center O at the 10 o'clock position toward the center of the dial 11. It can also be provided. Similar to the movement 2 shown in FIG. 2, a display device (not shown) similar to the day display device 20 is incorporated in the movement 9 of the timepiece 8. In the day display device incorporated in the movement 9, in the day display device 20 shown in FIG. 4, the position where the lever 43 is provided moves to the outer peripheral side of the movement 9, and the day hand 52 is attached to the shaft portion 431. The position is adjusted to match the orientation of the display unit 81.

  Further, the rotation angle of the day hand 82 (FIG. 6) in the timepiece 8 is larger than the rotation angle of the day hand 52 (FIG. 1) in the timepiece 1, which is, for example, the cam 42 (FIG. In the Archimedean spiral shape of 4), it can be realized by increasing the distance from the center proportional to the rotation angle and increasing the distance between the start end portion 422 and the peak portion 421. That is, if the increment in the cam 42 is large, the lever 43 (FIG. 4) that responds to the rotation of the cam 42 also rotates in a wide range, and the rotation angle of the day hand 82 (FIG. 6) attached to the lever 43 is large. It becomes. Therefore, the sector angle of the display unit 81 (FIG. 6) is larger than the sector angle of the display unit 51 (FIG. 1). The turning angle of the day hands 52 and 82 is determined by the relationship between the shape of the cam 42 and the shape of the lever 43 (FIG. 4). Therefore, the rotation angle of the day hand 82 can also be changed by changing the shape of the lever 43, and the appearance design of the timepiece can be changed.

In addition, the shape of the pointing member is not limited to the needle shape as in the above-described embodiment, and for example, a design of an animal or a flower or a character design can be employed.
The shape of the display unit may be one in which only a fan-shaped arc portion is shown.

In the above embodiment, the retro-style day display using the day display device 20 is adopted. However, the display device of the present invention is not limited to the day of the week, calendar display of day, month, year, etc., Daan, Buddha, etc. It can also be applied to the calendar note display and time display such as hours, minutes and seconds. At this time, the reduction ratio (speed increase ratio) of the driving vehicle, the driven vehicle, the gear unit, and the indicating vehicle is appropriately determined so as to be a feed amount according to the purpose of display.
In addition, a plurality of display devices of the present invention can be provided, and for example, a plurality of types of retro-tone display such as month and day, day and day can be realized.

  A conventional ring-shaped rotating plate (date wheel, day wheel, etc.) can be used in conjunction with the present invention for calendar display and time display. For example, it can be considered that the date is displayed on a rotating plate, and the display unit of the present invention displays the month and the day of the week. Even with such a configuration, since the display device of the present invention has a simple structure, a driving vehicle, a driven vehicle, or the like can be easily incorporated into the inner peripheral portion of the rotating plate.

The top view which shows the external appearance of the timepiece in embodiment of this invention. The top view which shows the movement of the timepiece in the said embodiment. Sectional drawing of the principal part of the movement of the timepiece in the said embodiment. FIG. 3 is an enlarged view of a main part of FIG. 2 and is a plan view showing a display device of a watch. The figure which shows operation | movement of the day display apparatus in the said embodiment. The external appearance top view of the timepiece which concerns on the modification of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1,8 ... Clock, 20 ... Day-of-the-week display device (display device), 23 ... Ground plate, 24 ... Presser (plate member), 31 ... Hour wheel (drive vehicle), 32 ...・ Day turning wheel (intermediate wheel), 41 ... day intermediate wheel (driven vehicle), 42 ... cam, 43 ... lever, 51 ... display, 52,82 ... day hand (instruction) Member), 241 ... opening, 321 ... feed claw, 431 ... shaft, 432 ... main body, 432B ... bent part, 432D ... overlapping part.

Claims (6)

A driving vehicle rotated by a power source;
A driven vehicle driven by this driving vehicle;
A cam that rotates through this follower,
A rotatable lever abutting against the cam;
An indicator member which is provided coaxially with the rotation axis of the lever and rotates;
A timepiece display device comprising: a fan-shaped display unit indicated by rotation of the pointing member. The timepiece display device according to claim 1,
A timepiece display device comprising biasing means for biasing the lever into a state of being in contact with the cam. The timepiece display device according to claim 1 or 2,
The driving wheel is an hour wheel equipped with an hour hand,
A timepiece display device characterized in that an intermediate wheel having a feed claw for feeding the driven vehicle is provided between the hour wheel and the driven vehicle. The timepiece display device according to any one of claims 1 to 3,
The rotating shaft of the cam and the rotating shaft of the driven vehicle are arranged coaxially,
A part of the lever overlaps with the cam. The timepiece display device according to claim 4,
The driving vehicle, the driven vehicle, and the cam are pivotally supported between a main plate and a plate member facing the main plate,
The lever has a shaft part and a plate-like main body provided on the shaft part as separate bodies,
The shaft portion is pivotally supported by the base plate, and a tip portion projects from a shaft hole formed in the plate member,
The main body is attached to the shaft portion from the side opposite to the base plate of the plate member, a part of which is bent toward the base plate side and passes through an opening formed in the plate member to contact the cam A display device for a clock. A timepiece comprising the display device according to any one of claims 1 to 5.

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