JP2770136B2 - Rotary decoration drive - Google Patents

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 for a clock with a rotary decoration.

[0002]

2. Description of the Related Art Conventionally, there has been known a rotary decoration driving device incorporated in a table clock or the like. The rotary ornament is mounted on the drive shaft from above, and is frictionally coupled to the drive shaft by the weight of the rotary ornament, and the frictional coupling force rotates in conjunction with the movement of the drive shaft. Due to such a coupling method, the rotary ornament moves upward on the drive shaft when a force exceeding its own weight acts upward. For this reason, various measures are taken to prevent the rotary decoration from being damaged when an unexpected external force such as vibration is applied during transportation or the like.

[0003] For example, a storage section is provided separately from a watch main body in a personal box, and a rotating decoration is wrapped and packed.

In this case, the user is forced to take out the rotary ornament from the box and use the rotary ornament mounted on the drive shaft of the rotary ornament of the timepiece body.

[0005] As another example, a rotary ornament is previously mounted on a drive shaft of the rotary ornament in the timepiece body. In some cases, a cushioning material made of eperan or polypropylene is inserted so that the rotating decoration does not move in the axial direction. In this case, too, the user removes the cushioning material before use.

[0006] As another example, a driving mechanism for a rotary decoration is provided below a mounting portion of the timepiece frame.
A drive shaft is provided that protrudes through the through hole of the mounting portion, and a rotating ornament located above the mounting portion is attached to the protruding end of the drive shaft, and the rotating ornament passes through the through hole. There is an elastic piece provided with an elastic piece, and a retaining engagement claw that can be engaged with the lower edge of the through-hole is formed so as to protrude (Japanese Utility Model Laid-Open No. 5-57693).

[0007]

However, however, the first
In the prior art, there is a problem in that the individual packaging box is provided with a rotating decoration accommodating portion, so that the individual packaging box becomes large, and the cost of the product increases accordingly. In addition, the second prior art has a problem in that the cost is increased due to the necessity of the rotary decorative holding plate and the cushioning material. In addition, in any case, there is a disadvantage that a burden is imposed on the user. The third prior art eliminates the inconvenience of imposing a burden on the user, which was a problem in the first and second prior arts. Since the elastic piece provided on the rotating decoration is penetrated from above and the engaging claw formed on the elastic piece is engaged with the lower edge of the through hole,
There were restrictions on the configuration and design of the rotating ornament.

Accordingly, it is an object of the present invention to protect a rotating ornament with a user free without using a cushioning material even when a configuration in which the rotating ornament is prevented from falling off by a clock frame or the like cannot be adopted. It is an object of the present invention to provide a possible rotary ornament drive.

[0009]

In order to achieve the above object, a rotary decoration driving device according to the present invention is formed so as to be attachable to a frame such as a timepiece frame and protrudes from the inside to the outside. A rotary ornament drive device having a rotary shaft rotatably provided with the screw, a projecting end of the rotary shaft having a screw portion and a support portion having a diameter larger than the screw portion below the screw portion.
Yes by fixing sleeve having the supporting portion of the sleeve
, A rotating decoration is placed.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. As shown in FIGS. 1 and 2, the first rotating shaft 1
Is vertically erected through the cover 2 and the middle plate 3, and is rotatable by a bearing 5 press-fitted into the upper part of the upper case 4 and a bearing 7 provided in the lower case 6. Bearing. The bearing 7 is formed by a receiving 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 protrudes upward from the upper case 4, and a first rotating ornament 10 is mounted on the projecting end via a first sleeve 11. The first sleeve 11 is the first rotary shaft 1
Press fit.

Second rotating shaft 12 as an example of a rotating shaft
Has a hollow shape, and is fitted around the outer periphery of the first rotating shaft 1 so as to be rotatable and movable in the direction of gravity. The upper end of the second rotary shaft 12 protrudes upward from the upper case 4, and a second rotary ornament 13 is mounted on the protruding end thereof via a second sleeve 14 as an example of a sleeve. Have been. 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 thread 1 on its outer periphery.
4a, a fitting shaft portion 14b having a larger diameter than the screw portion, and a support portion 14c having a larger diameter than the fitting shaft portion are formed in order of increasing diameter. The screw portion 14a is located on the outer end side of the second rotating shaft 12. The second rotary ornament 13 is a screw portion 14
a, and fitted with the fitting shaft portion 14b to form the support portion 14c.
Is mounted so as to be rotatable. That is, the second rotation axis
12 has a threaded portion 14a and a portion below the threaded portion.
A second switch having a support portion 14c having a diameter larger than that of the screw portion .
Leaves 14 are fixed and support the second sleeve 14
The second rotary decoration 13 is placed on the part 14c. When a structure for preventing the upward rotation of the second rotary ornament 13 cannot be adopted due to a clock frame or the like, the nut 15 is screwed into the screw portion 14a so that the second rotary ornament 13 is not pulled upward. Can be.

In this embodiment, the second sleeve 14 is provided with the fitting shaft 14b, but the present invention is not limited to this. The second sleeve 14 does not have the fitting shaft 14b. Screw part 1
4a and the support portion 14c alone. Further, when the retaining structure of the second rotary ornament 13 can be adopted by a clock frame or the like, the nut 15 is omitted.

A first permanent magnet 16 is fixed below the center of the second rotating shaft 12. That is, a bush 17 is fixed below the center 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 middle plate 3. The second permanent magnet 18 is fixed to the upper surface of the cover-2. That is, the bush-shaped projection 2a is provided on the upper surface of the cover-2.
Are formed integrally, and the second permanent magnet 18 is press-fitted into the bush-shaped projection. The second rotating shaft 12 fits through the bush-shaped protrusion 2a. The second permanent magnet 18 is located below the first permanent magnet 16 and faces the first permanent magnet 16 and is magnetically repelled. That is, the first permanent magnet 16 and the second permanent magnet 18 are magnetized so that the opposing surfaces have the same magnetic pole. Therefore, the first permanent magnet 16 is magnetically repelled from the second permanent magnet 18 so that downward movement is restricted.

The upper surface of the bush 17 has the first permanent magnet 16
When the upper surface of the bush 17 contacts the upper case 4, the upward movement of the second rotary shaft 12 is restricted.

As described above, by screwing the nut 15 onto the screw portion 14a, it is possible to prevent the second rotary ornament 13 from being pulled out upward. Even if the retaining structure of
The rotating decoration can be protected by the user free without imposing a burden on the user.

A means for rotating the first and second rotating shafts 1 and 12 is provided between the middle plate 3 and the lower case 6. That is, the fourth wheel & pinion 19 is fixed to a protruding portion of the first rotary shaft 1 from the middle plate 3 downward. 4th car 1
9, a torque from a stepping motor 20, which is a power source, is transmitted. That is, the rotation of the step motor 20 is
The torque is transmitted to the third wheel 23 via the rotor kana 21 and the second wheel 22, the rotational force is smoothed by the coil spring 24, transmitted to the transmission shaft 25, transmitted from the transmission shaft to the fourth wheel 19, and 1 is rotated. The torque transmitted to the fourth wheel & pinion 19 is transmitted to the seventh wheel & pinion 28 via the fifth wheel & pinion 26 and the sixth wheel & pinion 27 to rotate the second rotary shaft 12 . 7
The center wheel 28 cannot rotate with respect to the second rotation shaft 12 ,
Also, they are slidably connected in the axial direction.

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

As shown in FIG. 2, the fourth wheel 19 has a first projection 19a. The lower case 6 is provided with a circumferential wall 6a facing the first protrusion 19a, and the first recess 6 into which the first protrusion 19a fits loosely inside the wall 6a.
b is formed. First protrusion 19a and first recess 6b
Is provided with a viscous fluid 29 made of grease.

The seventh wheel & pinion 28 has a second protrusion 28a formed thereon. The intermediate plate 3 is provided with a circumferential wall portion 3a facing the second protrusion portion 28a, and a second concave portion 3b in which the second protrusion portion 28a is loosely fitted is formed inside the wall portion 3a. I have. Second
Gap B between the projection 28a and the second recess 3b
2, a viscous fluid 29 made of grease is provided.

First rotating ornament 10 and second rotating ornament 13
Is driven, the weight of the first rotary ornament 10
Of the first shaft 19 due to the relationship between the weight of the rotating shaft 1, the diameter of the first protrusion 19 a, the diameter of the first recess 6 b, the size of the first gap B 1, and the viscous fluid 29. Viscous resistance R1
The weight of the second rotary ornament 13, the weight of the second rotary shaft 12, the diameter of the second projection 28a, the diameter of the second concave portion 3b, the second
Is substantially equal to the second viscous resistance R2 generated in the seventh wheel & pinion 28 depending on the size of the gap B2 and the relationship with the viscous fluid 29.

With such a configuration, the first rotary ornament 1
In a state where the 0 and the second rotary ornaments 13 are being driven, the first rotary ornament 10 and the second rotary ornament 13 do not cause rotational unevenness to each other.

[0024]

As described above, at the protruding end of the rotating shaft, the screw portion and the lower portion of the screw portion have a larger diameter than the screw portion.
A sleeve having a support portion secured to the supporting portion of the sleeve
Because the rotating decoration is placed , even if it is not possible to adopt a configuration that prevents the rotating decoration from being removed with a clock frame etc., without using a cushioning material,
The rotating decoration can be protected by the user free.

[Brief description of the 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. 1;

[Explanation of symbols]

 12 rotating shaft (second rotating shaft) 13 rotating decoration (second rotating decoration) 14 sleeve (second sleeve) 14a screw portion 14c support portion

Claims (1)

(57) [Claims] 1. A Yes formed to be attachable to the frame such as a watch frame, and the rotary decoration drive having a rotary shaft that is rotatably mounted as to protrude from the inside to the outside, the projecting end of the rotary shaft In the part, there is a thread part and below this thread part
A rotary decoration driving device , wherein a sleeve having a support portion having a diameter larger than that of the screw portion is fixed, and a rotary decoration is placed on the support portion of the sleeve.