JPH0875870A - Revolving decoration driving apparatus - Google Patents

Abstract

PURPOSE: To protect a revolving decoration with no need of any user nor a buffer material by installing a supporting part with a large diameter in a sleeve fixed on a revolution axis. CONSTITUTION: An upper end part of a revolution axis 12 is projected upward from an upper case 4 and a second revolving decoration 13 is installed in the projected end through a sleeve 14. The sleeve 14 is pushed and fixed in the revolution axis 12 by pressure. A screw part 14a, a fitting axis 14b with a larger diameter than that of the screw part 14a, and a supporting part 14c with a further larger diameter are formed in the larger diameter order in the outer circumference of sleeve 14. The screw part 14a is positioned in the external end part of the revolution axis 12. The screw part 14a is made to penetrate the revolving decoration 13 so that the decoration 13 can revolve freely, the decoration 13 is fitted with the fitting axis 14b and mounted in the supporting part 14c so that the decoration can revolve freely. The revolving decoration 13 can be prevented from being pulled out upward by screwing the screw part 14a in a nut 15. Consequently, even in the case no system to prevent the revolving decoration 13 from being pulling out upward can be employed, the revolving decoration 13 can be protected with no need of compelling a user to take care.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotary decoration driving device used in a table clock with a rotary decoration.

[0002]

2. Description of the Related Art A rotary decoration drive device that has been conventionally used by being incorporated in a table clock or the like is known. The rotary ornament is mounted on the drive shaft from above, frictionally coupled to the drive shaft by the weight of the rotary ornament, and the frictional coupling force causes the rotary ornament to rotate in association with the movement of the drive shaft. Due to such a coupling system, the rotary ornament moves upward when the force exceeding its own weight acts upward. Therefore, various measures are taken so that the rotary ornament is not damaged when an unexpected external force such as vibration is applied during transportation.

For example, a storage box is provided in the individual packaging box separately from the watch body, and the rotary ornament is packaged and packed. In this case, the user is forced to take out the rotary decoration from the individual packaging box, mount the rotary decoration on the drive shaft of the rotary decoration of the timepiece body, and use it.

As another example, the rotary ornament is mounted in advance on the drive shaft of the rotary ornament in the timepiece main body, and the top of the rotary ornament is pressed against the rotary ornament holding plate fixed to the timepiece frame and the lower part of the rotary ornament. There is also one in which a cushioning material made of eperan or polypropylene is inserted so that the rotary ornament does not move in the axial direction. In this case also, the user will have to remove the cushioning material before use.

As another example, a drive machine body for a rotary ornament is provided under the mounting portion of the timepiece frame, and the drive machine body is
A drive shaft protruding through the through hole of the mounting portion is provided, and a rotary decoration located above the mounting portion is attached to the protruding end of the drive shaft, and the rotary decoration penetrates the through hole. There is one in which an elastic piece is provided, and a retaining engagement claw capable of engaging with the lower edge portion of the through hole is formed to project from the elastic piece (Japanese Utility Model Laid-Open No. 5-57693).

[0006]

However, the above first problem
In the related art, since the individual packaging box is provided with the storage portion for the rotary decoration, the individual packaging box becomes large and the cost of the product increases accordingly. Further, the second conventional technique has a problem that the cost of the product is increased because the rotary decorative presser plate and the cushioning material are required. In addition to that, there is an inconvenience that imposes a burden on the user in any case. The third prior art eliminates the inconvenience that imposes a burden on the user, which is a problem in the first and second prior arts. Since the elastic piece provided on the rotary ornament is penetrated and the engaging claw formed on the elastic piece is engaged with the lower edge portion of the through hole,
There are restrictions on the structure and design of the rotating decoration.

Therefore, an object of the present invention is to provide a rotary ornament which can protect the rotary ornament freely without using a cushioning material even when the structure for preventing the rotary ornament from slipping off by a watch frame or the like cannot be adopted. It is to provide a drive device.

[0008]

In order to achieve the above-mentioned object, the rotary ornament drive device according to the present invention is formed so that it can be attached to a frame body such as a watch frame and projects from the inside to the outside. In a rotary decoration drive device having a rotary shaft that is rotatably provided with the rotary shaft, a sleeve having a threaded portion is fixed to the rotary shaft, and the sleeve is larger than the threaded portion on which the rotary decoration is placed. A diameter support is provided.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. As shown in FIGS. 1 and 2, the first rotary shaft 1
Is erected vertically through the cover 2 and the intermediate plate 3, and is rotatably supported by a bearing 5 press-fitted in the upper part of the upper case 4 and a bearing 7 provided in the lower case 6. . The bearing 7 is formed by a stone 8 made of ruby for supporting a thrust load and a hole bush 9 made of plastic for supporting a radial load. The upper end of the first rotating shaft 1 projects upward from the upper case 4, and the first rotating ornament 10 is attached to the projecting end via the first sleeve 11. The first sleeve 11 is the first rotating shaft 1
It is press-fitted into.

The second rotary shaft 12 as an example of the rotary shaft.
Has a hollow shape and is fitted to the outer periphery of the first rotary shaft 1 so as to be rotatable and movable in the direction of gravity. The upper end of the second rotary shaft 12 projects upward from the upper case 4, and the second rotary decoration 13 is attached to the projecting end via a second sleeve 14 as an example of a sleeve. The second sleeve 14 is press-fitted into the second rotating shaft 12 and is located below the first sleeve 11 at a predetermined interval. An adjustment weight W is fixed to the second rotary ornament 13.

The second sleeve 14 has a threaded portion 1 on the outer circumference.
4a, a fitting shaft portion 14b having a diameter larger than the threaded portion, and a support portion 14c having a diameter larger than the fitting shaft portion are formed in a gradually increasing diameter order. The screw portion 14a is located on the outer end side of the second rotating shaft 12. The second rotary ornament 13 has a threaded portion 14
a is penetrated, is fitted with the fitting shaft portion 14b, and is supported by the support portion 14c.
It is rotatably mounted on. If the structure for preventing the second rotary ornament 13 from coming out upward cannot be adopted due to the watch frame or the like, the nut 15 is screwed to the screw portion 14a so that the second rotary ornament 13 does not come out upward. You can

Although the second sleeve 14 is provided with the fitting shaft portion 14b in the present embodiment, the present invention is not limited to this, and the second sleeve 14 does not have the fitting shaft portion 14b and the screw portion 1 is provided.
Only 4a and the support portion 14c may be used. Further, when the structure for preventing the second rotary ornament 13 from coming off is adopted by the watch frame or the like, the nut 15 is omitted.

A first permanent magnet 16 is fixed below the central portion of the second rotary shaft 12. That is, the bush 17 is fixed below the central portion of the second rotating shaft 12, and the first permanent magnet 16 is press-fitted into the bush 17.

A cover 2 is provided on the upper surface of the intermediate plate 3. The second permanent magnet 18 is fixed to the upper surface of the cover 2. That is, the bush-shaped protrusion 2a is provided on the upper surface of the cover 2.
Is integrally formed, and the second permanent magnet 18 is press-fitted into this bush-shaped protrusion. The second rotary shaft 12 is fitted through the bush-shaped protrusion 2a. The second permanent magnet 18 is located below the first permanent magnet 16, faces the first permanent magnet 16, and is magnetically repulsive. That is, the first permanent magnet 15 and the second permanent magnet 18 are magnetized so that the facing surfaces have the same magnetic pole. Therefore, the first permanent magnet 16 is magnetically repulsive with the second permanent magnet 18 to restrict downward movement.

The upper surface of the bush 17 is the first permanent magnet 16
The upper surface of the bush 17 is formed so as to project above the upper surface of the upper case 4 and contacts the upper case 4, whereby the upward movement of the second rotating shaft 12 is restricted.

As described above, by screwing the nut 15 onto the threaded portion 14a, it is possible to prevent the second rotary ornament 13 from coming out upward. Therefore, the second rotary ornament 13 is moved upward by the watch frame or the like. Even if you can not take the retaining structure of
It is possible to protect the rotating decoration free of charge without imposing a burden on the user.

Means for rotationally driving the first rotary shaft 1 and the second rotary shaft 12 are provided between the middle plate 3 and the lower case 6. That is, the fourth wheel & pinion 19 is fixed to the protruding portion of the first rotating shaft 1 from the middle plate 3 to the lower side. 4th car 1
The rotational force from the step motor 20, which is a power source, is transmitted to the motor 9. That is, the rotation of the step motor 20 is
The torque is transmitted to the third wheel 23 via the rotor pinion 21, the second wheel 22, the rotational force is smoothed by the coil spring 24, and is transmitted to the transmission shaft 25. The rotating shaft 1 is rotated. The rotational force transmitted to the 4th wheel 19 is transmitted to the 7th wheel through the 5th wheel 26 and the 6th wheel 27.
It is transmitted to the number wheel 28 and rotates the second rotary shaft 13.
The seventh wheel & pinion 28 is connected to the second rotating shaft 13 such that they cannot rotate relative to each other and can slide in the axial direction.

As shown in FIG. 3, the step motor 20 includes a rotor pinion 21, a stator S, a drive coil D,
The rotor pinion 21 is driven by a drive circuit (not shown) formed of the coil bobbin C and formed on the circuit board K. The sixth wheel & pinion 27 is an idler for making the rotating directions of the first rotating shaft 1 and the second rotating shaft 12 opposite to each other.

As shown in FIG. 2, the first gear 19 has a first protrusion 19a. The lower case 6 is provided with a circumferential wall portion 6a facing the first protrusion 19a,
A first recess 6b into which the first protrusion 19a is loosely fitted is formed inside the wall 6a. A viscous fluid 29 made of grease is provided in the first gap B1 between the first protrusion 19a and the first recess 6b.

A second protrusion 28a is formed on the second gear 28. The intermediate plate 3 is provided with a circumferential wall 3a facing the second protrusion 28a, and a second recess 3b in which the second protrusion 28a is loosely fitted is formed inside the wall 3a. I am doing it.
A viscous fluid 29 made of grease is provided in the second gap B2 between the second protrusion 28a and the second recess 3b.

While the first rotary ornament 10 and the second rotary ornament are being driven, the weight of the first rotary ornament 10, the weight of the first rotary shaft 1, the diameter of the first protrusion 19a, 1 recess 6b
The first viscous resistance R1 generated in the fourth wheel & pinion 19 due to the diameter of the first gap B1, the size of the first gap B1, and the relationship with the viscous fluid 29,
The weight of the second rotary ornament 13, the weight of the second rotary shaft 12, the diameter of the second protrusion 28a, the diameter of the second recess 3b, the second
The second viscous resistance R2 generated in the seventh wheel & pinion 28 due to the size of the gap B2 and the relationship with the viscous fluid 29 is set to be substantially equal.

With such a structure, the first rotary ornament 1
In the state where 0 and the second rotary ornament are being driven, the first rotary ornament 10 and the second rotary ornament do not have uneven rotation.

[0023]

As described above, since the sleeve having the threaded portion is fixed to the rotary shaft and the sleeve is provided with the support portion having a diameter larger than the threaded portion on which the rotary ornament is mounted, the rotary ornament is provided. Even if the structure that prevents the clock from coming off with a clock frame or the like cannot be adopted, the rotating ornament can be protected without using a cushioning material.

[Brief description of drawings]

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

FIG. 2 is a partially enlarged view of FIG.

FIG. 3 is a partial plan view of FIG.

[Explanation of reference numerals] 12 rotary shaft (second rotary shaft) 13 rotary ornament (second rotary ornament) 14 sleeve (second sleeve) 14a screw portion 14c support portion

Claims (1)

[Claims] 1. A rotary decoration drive device having a rotary shaft which is formed so as to be attachable to a frame body such as a clock frame and which projects from the inner side to the outer side and is rotatably provided. A rotary ornament drive device, wherein a sleeve having a threaded portion is fixed, and the sleeve is provided with a support portion having a diameter larger than that of the screw portion on which the rotary ornament is placed.