JPS6033427Y2 - Double rotating decoration drive device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a drive device for a double rotating ornament attached to, for example, a watch or the like to give a moving decorative effect.

When attaching this type of rotating ornament, if a conventionally known mechanism is simply used to make it into a double rotating ornament, there is a drawback that the driving section becomes complicated and large.

SUMMARY OF THE INVENTION In view of the above-mentioned circumstances, it is an object of the present invention to provide a drive device for a double-rotation decoration that has a simple configuration and can be manufactured in a small size.

In the drawing, cases 1 and 2 as receiving plate members are connected to each other to form a box-like body, and two coaxially provided rotating shafts 3 and 4 are rotated by these cases 1 and 2. freely supported.

The upper end portions of the rotating shafts 3 and 4 protrude upwardly from the case 1, and each upper end portion is provided with an appropriately designed rotating decoration (not shown).
) is attached and driven to reciprocate.

A hairspring 5 is installed at the lower part of the rotating shaft via a hairspring 6, and the outer end of this hairspring 5 is fixed to the lower case 2 via a fixing means (not shown). A reciprocating rotational motion is applied to the rotating shaft 3 by the spring force of 5.

Further, a seat 7 is fixed to the rotating shaft 3 above the hairspring 5, and two plates 8, 8 are fixed to the seat 7 so as to extend in parallel on both sides.

Drive magnets 9.9 are fixed to the left ends of the plates 8, 8 so as to face each other, and two planetary gears 10.1 are mounted to the right ends of the drive magnets 9.9.
1 is sandwiched between them and rotatably supported.

A well-known detection drive coil 12 is installed between the drive magnets 9, 9 and magnetically cooperates with them to supply energy so as to continue the reciprocating motion of the rotary shaft 3.

This coil 12 is fixedly held in both cases 1.degree. 2 via a holder (not shown).

Although the planetary gear 10.11 is a lightweight component made of plastic, its size is set so that it acts as a balancer for the drive magnets 9, 9. The teeth 10a, 11a between
Comrades are meshing with each other.

In the planetary gear 10, a tooth portion 10b formed to protrude downward from the lower plate 8 meshes with a fixed gear 13 formed integrally with the lower case 2. The tooth portion 11b formed to protrude upward is the rotating shaft 4.
It meshes with a sun gear 14 which is formed integrally with the sun gear 14.

The rotating shaft 3 is driven to reciprocate and rotate at a constant period and deflection angle, as is well known, by the cooperation of the hairspring 5, the drive magnets 9, 9, and the coil 12.

At this time, the rotational motion of the rotating shaft 3 is transmitted to the rotating shaft 4 via a transmission mechanism consisting of a fixed gear 13, planetary gears 10, 11, and a sun gear 14.

Since two planetary gears 10 and 11 are provided between the sun gear 14 and the fixed gear 13, the rotating shaft 4
It is rotated in the opposite direction.

Furthermore, the rotation ratio of the rotating shaft 4 to the rotating shaft 3 is determined by the number of teeth of the fixed gear 13 and the sun gear 14, but in this example, the rotation ratio is such that both rotate in opposite directions at approximately the same speed. The number of teeth of each gear 13, 14 is determined appropriately.

Since the sun gear 14 (rotary shaft 4) and the seat 7 rotate in opposite directions as described above, there is a layer of Teflon (registered trademark) between them.
A low friction coefficient member 15 such as the like is interposed, and consideration is given to minimizing the friction loss between the two.

In the above embodiment, on the rotating shaft 4 side of the plates 8, 8,
Further, the design may be changed so that the sun gear 14 is provided on the rotating shaft 3 side, and one of the plates 8, 8 may be omitted.

Further, in this embodiment, the deflection angle is limited to approximately 270° so that the planetary gears 10, 11 do not collide with the coil 12 when the plates 8, 8 reciprocate.

According to the drive device for the double rotating decoration of the present invention constructed as described above, only one side of the rotating shafts 3 and 4 is driven to reciprocate and the other side is reciprocally rotated in the opposite direction, so that the decorative effect is further enhanced. It is effective, simple in construction, has a small number of parts, and is therefore compact, inexpensive to manufacture, and easy to assemble.

[Brief explanation of the drawing]

The drawings relate to a driving device for a double rotating decoration according to the present invention. 3.4... Rotating shaft, 5... Balance spring, 8... Plate, 9... Drive magnet, 1
0. It...Old planetary gear, 12...Coil, 1
3...Fixed gear, 14...Sun gear.

Claims (3)

[Scope of utility model registration request] (1) Two rotating shafts are coaxially and rotatably supported, and one of the two rotating shafts has a hairspring that provides reciprocating rotational motion and extends parallel to both sides from the center of the rotating shaft. A drive magnet magnetically cooperating with the magnetic flux from the fixedly installed coil is fixed to one end of at least one of the plates, and the drive magnet magnetically cooperates with the magnetic flux from the fixedly installed coil. Two planetary gears are provided between the ends so as to be rotatable and mesh with each other, and a fixed gear that meshes with the positive parts of both the planetary gears is provided coaxially with both of the rotation shafts, and the other of the two planetary gears is provided. A drive device with a double rotating decoration, which is constructed by fixing a sun gear that meshes with the other rotating shaft to the other of the rotating shafts. (2) A drive device for a double rotating ornament according to claim 1, wherein both of the planetary gears are balancers for the drive magnet. (3) The drive device for a double rotating decoration according to claim 1, wherein the two rotating shafts are configured to reciprocate in opposite directions and at substantially the same speed.