JPH0519987U - Support device for rotary dials - Google Patents

Abstract

(57) [Abstract] [Purpose] The dial is rotatably supported by a simple structure and absorbs rattling when the dial is rotating, even if the dial itself is deformed or warped. Thus, there is provided a support device for a rotary dial which enables smooth rotation. [Structure] Timekeeping movement 4 which is coaxial with the pointer shaft 5
A movement fixing nut 11 is screwed on a center fixing screw 10 protruding from the time fixing movement 4 is fixed to the support member 3, and a dial supporting nut 12 is attached to the dial 7.
The dial plate 7 is rotatably attached to the support member 3 by being fitted in the center hole of and and screwed with the center fixing screw 10.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a rotary dial used for a timepiece having a dial that rotates.

[0002]

[Prior Art]

 As a timepiece that incorporates movements from the past, for example, there is a mechanical clock that opens the door at the hour and dances with dolls and plays music. However, the dial is generally stationary. In view of such circumstances, the applicant of the present application has previously developed a hand type timepiece (No. 2-41192), in which a dial is rotationally driven by a drive motor that operates by receiving a signal from a timing movement. is suggesting.

[0003]

[Problems to be solved by the device]

 In a timepiece in which the dial is rotated as described above, a plurality of pulleys are engaged with the inner circumference or the outer circumference of the rotary dial to support the rotary dial. However, in such a configuration in which the rotary dial is supported by multiple pulleys in this way, if the rotary dial itself is deformed or warped, the rattling of the rotary dial during rotation cannot be fully absorbed and a smooth rotation operation is achieved. May not be obtained.

Therefore, an object of the present invention is to rotatably support a dial with a simple structure, and even when the rotary dial itself is deformed or warped, there is a rattling when the rotary dial rotates. The object of the present invention is to provide a support device for a rotary dial which absorbs the heat and can smoothly rotate.

[0005]

[Means for Solving the Problems]

 In order to achieve the above object, the device for supporting a rotary dial according to the present invention is a movement for timekeeping in which a nut for fixing the movement is screwed to a center fixing screw which is coaxial with the pointer shaft and protrudes from the movement for timekeeping. Is fixed to the supporting member, and the dial supporting nut is fitted into the central hole of the dial and screwed with the central fixing screw to rotatably attach the dial to the supporting member.

[0006]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings. As shown in FIGS. 1 to 3, a ring-shaped fixed dial 2 having a circular front shape is fixed inside a frame body 1 of the timepiece. A fan-shaped window 2a is provided on the outer peripheral portion of the fixed dial 2 at a position corresponding to 11 o'clock, 12 o'clock and 1 o'clock. A display character 2b is provided.

As shown in FIG. 3, on the back side of the fixed dial plate 2, a support plate 3 is fixed at predetermined intervals, and a finger from the timekeeping movement 4 attached to the support plate 3 is touched. A needle shaft 5 penetrates through the support plate 3 and projects further forward than the fixed dial 2, and a finger needle 6 is attached to the projecting end.

In the space between the fixed dial 2 and the support plate 3, a rotary dial 7 is rotatably provided concentrically with the rotation center of the pointer 6. On the outer peripheral portion of the rotary dial 7, hour display characters 7a (Fig. 1) are provided at positions corresponding to 11:00, 12:00, and 1 o'clock. 7b (FIG. 2) is depicted. At this time, the display character 7a and the pattern 7b are adapted to appear through the window 2a of the fixed dial 2, as shown in FIGS.

A movable ornament 8 in the shape of a doll on which one person rides is attached to the rotary dial 7 so as to be positioned below the pointer shaft 5. The movable ornament 8 is composed of a body 8a fixed to the rotary dial 7, a swingable swing ornament 8b in the shape of an arm, and a rotatable ornament 8c in the shape of a unicycle. At the left end of the decoration 8b, an hour display character "6" is integrally formed.

A configuration in which the rotary dial 7 is rotatably supported concentrically with the center of rotation of the pointer 6 will be described.

As shown in FIGS. 4 to 7, the movement fixing nut 11 is screwed onto the center fixing screw 10 which is coaxial with the pointer shaft 5 and protrudes from the movement 4 for measuring time. It is fixed to the support plate 3. A dial supporting nut 12 fitted in a central hole of the rotary dial 7 via a collar 12a is screwed to a center fixing screw 10. Further, the outer side of the rotary dial 7 is engaged with the recesses of the rollers 13 rotatably mounted on the four columns 3a standing upright on the support plate 3 at equal intervals. As shown in FIG. 6, the roller 13 is restricted from moving in the radial direction (vertical direction in FIG. 6), but slightly movable in the axial direction (horizontal direction in FIG. 6). Is becoming Therefore, even if the rotating dial 7 itself has a warp, the roller 13 moves in the axial direction to absorb the rattling of the rotating dial 7 during rotation, and the rotating dial 7 rotates smoothly. .. The roller 13 also has a function of preventing the load from spreading to the timekeeping movement 4 when a load is applied to the rotary dial 7 from the outside.

With such a configuration, the rotation dial 7 is rotatably supported by the rotation center being sandwiched between the movement fixing nut 11 and the dial supporting nut 12. Further, since the dial supporting nut 13 is screwed into the center fixing screw 10, positioning of the rotation center of the rotating dial 7 itself becomes accurate.

Next, a configuration for rotationally driving the rotary dial 7 will be described.

As shown in FIGS. 4 and 8 to 10, an annular portion 7c which is concentric with the rotation center of the pointer 6 is integrally formed at a portion near the outer periphery of the back face of the rotary dial plate 7. Teeth 7d are formed on the outer peripheral surface of the annular portion 7c. A dial driving movement 14 is attached to the support plate 3, and an output shaft 14a (see FIG. 10) projects from the dial driving movement 14 through the support plate 3 and is attached to the protruding end of the pinion. 15 meshes with the tooth portion 7d of the rotary dial plate 7 described above.

As shown in FIGS. 4 and 8 to 10, a cylindrical portion 7e, which is concentric with the above-mentioned annular portion 7c, is integrally provided at a portion of the rear face of the rotary dial 7 near the center of rotation. A switch opening / closing cam 7f is continuously formed on a part of the cylindrical portion 7e. A switch 16 for detecting one rotation is attached to the support plate 3, and the cam follower 16a of the switch 16 for detecting one rotation can follow the inner peripheral surface of the cylindrical portion 7e. When the cam follower 16a is engaged with the switch opening / closing cam 7f, the one-time rotation detection switch 16 sends a stop signal to the dial driving movement 14.

With such a configuration, when the dial driving movement 14 starts to operate, the rotation of the pinion 15 is transmitted to the tooth portion 7d, and the rotating dial 7 is concentric with the center of rotation of the pointer 6. Rotate to. Further, since the rotary dial 7 is integrally provided with the annular portion 7c and the cylindrical portion 7e, the rotary dial 7 itself is prevented from being deformed or warped, and the rotary dial 7 contacts the fixed dial 2 or the support plate 3. There is nothing to do.

Next, a configuration in which the movable decoration 8 is moved according to the rotation of the rotary dial 7 will be described.

As shown in FIGS. 8 to 10, the front surface of the support plate 3 is integrally formed with a sun gear 3b which is concentric with the rotation center of the pointer 6 and has teeth on its inner peripheral surface. A planetary gear 17 meshing with the sun gear 3b is rotatably attached to the back surface of the rotary dial 7. An intermediate wheel 18 is rotatably attached to the rear surface of the body 8a of the movable ornament 8, and the tooth portion 18a of the intermediate wheel 18 meshes with the planetary gear 17 described above.

An eccentric cam 18b is formed at the center of the intermediate wheel 18, and a recess 8d of a swing ornament 8b which is swingable around the pin 9 is engaged with the eccentric cam 18b. Further, the tip end portion of the intermediate wheel 18 is a tooth portion 18c, and this tooth portion 18c meshes with a gear 8e integrally provided on the back surface of the rotary ornament 8c.

With such a configuration, the planetary gear 17 rotates along with the sun gear 3b as the rotary dial 7 rotates, and the rotation (rotation) of the planetary gear 17 itself is transmitted to the intermediate wheel 18. As shown by the arrow in FIG. 9, the swing ornament 8b swings by the rotation of the eccentric cam 18b, and the rotary ornament 8c also rotates.

Next, the operation of the present invention will be described.

At the hour on the hour, for example, at 10 o'clock, a time signal such as a melody is played, and the hour signal is supplied to the dial driving movement 14 to rotate the output shaft 14 a, and this rotation causes the pinion 15 to rotate. It is transmitted to the tooth portion 7d on the back surface of the rotary dial 7, and the rotary dial 7 itself rotates clockwise concentrically with the center of rotation of the pointer 6.

By rotating the rotary dial 7, the display character 7a (FIG. 1) is hidden when it was visible through the window 2a, and instead the pattern 7b (FIG. 2) appears on the window 2a. Reveal.

With the rotation of the rotary dial 7, the planetary gear 17 rotates in the time direction along the inner peripheral surface of the sun gear 3b. The rotation (rotation) of the planetary gears 17 themselves is transmitted to the intermediate wheel 18, and as shown by the arrow in FIG. 9, the eccentric cam 18b rotates to cause the swinging ornament 8b to swing about the pin 9. At the same time, the rotary ornament 8c rotates counterclockwise through the train wheel.

Since the movable decoration 8 is attached to the front surface of the rotary dial 7, the movable decoration 8 moves in the clockwise direction along the inside of the frame 1 on the front surface of the fixed dial 2. With this configuration, it is as if the doll 8 is running inside the watch while rowing the unicycle (8c) while swinging its arms (8b) left and right to balance.

As the rotary dial 7 rotates, the cam follower 16 a of the one-rotation detecting switch 16 attached to the support plate 3 is attached to the inner peripheral surface of the cylindrical portion 7 e on the back surface of the rotary dial 7. To follow. When the dial 7 rotates exactly 360 degrees and the cam follower 16a engages with the switch opening / closing cam 7f, a stop signal is sent from the one-rotation detection switch 16 to the dial driving movement 14 to stop the rotating dial 7. Then, it returns to the original state (Fig. 1).

In the present embodiment, a hour signal is supplied from the timekeeping movement 4 to the dial driving movement 14 so that the rotating dial 7 makes one rotation at the hour (for example, 10 o'clock). However, the present invention is not limited to this, and an arbitrarily set time signal such as an alarm time may be supplied to the dial drive movement 14 to rotate the rotary dial 7.

Further, the rotary dial 7 may be configured to stop not only once but twice or three times.

[0029]

[Effect of the device]

 As described above, according to the rotary dial supporting device of the present invention, the center fixing nut for fixing the rotation center of the rotary dial, usually only the timepiece movement, and the dial supporting nut. Since it is rotatably supported using, the positioning of the center of rotation of the rotary dial itself becomes accurate. Even when the rotary dial itself is deformed or warped, the roller moves in the axial direction, so that the rattling of the rotary dial during rotation is absorbed and a smooth rotating operation can be obtained.

[Brief description of drawings]

FIG. 1 is a front view showing an embodiment of the present invention.

FIG. 2 is a front view showing the same operation state as above.

FIG. 3 is a sectional view taken along line aa of FIG.

FIG. 4 is a sectional view taken along line bb of FIG.

5 is a sectional view taken along line cc of FIG.

6 is an enlarged cross-sectional view of part A of FIG.

FIG. 7 is an enlarged sectional view of part B in FIG.

FIG. 8 is an exploded perspective view of essential parts.

FIG. 9 is an enlarged front view of the movable decoration.

FIG. 10 is a sectional view taken along line dd of FIG.

[Explanation of symbols]

 3 Support plate 4 Movement for timekeeping 5 Pointer shaft 7 Rotating dial plate 10 Center fixing screw 11 Movement fixing nut 12 Dial supporting nut 13 Roller

Claims (2)

[Scope of utility model registration request] 1. A center fixing screw which is coaxial with a pointer shaft and protrudes from a timekeeping movement, a movement fixing nut which is screwed with the center fixing screw to fix the timekeeping movement to a support member, and a dial plate. A rotary dial supporting device comprising a dial supporting nut that is fitted into a center hole and screwed with the center fixing screw to rotatably attach the dial to the supporting member. 2. The rotary dial supporting device according to claim 1, wherein a plurality of rollers engaging with the outer side of the dial are provided on the supporting member.