JPS6231903Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a rotating decoration device that works in conjunction with a clock wheel train, and more specifically to a rotating gear that is fixed to the rotating shaft of a rotating member, and a clock that meshes with these gears. The present invention is characterized in that either the forward rotation drive gear or the reverse rotation drive gear that transmits the rotation of the wheel train is a gear with missing teeth, so that the rotating member can be rotated forward and reverse at a predetermined period.

Conventionally, in a rotating decoration device attached to a watch, apart from the drive source of the watch mechanism, for example, a permanent magnet and an electromagnetic coil fixed to the balance wheel are arranged so as to be able to overlap and de-polymerize each other. Driven devices are well known. In this conventional device, rotational force was obtained using an attractive force or a repulsive force exerted by the electromagnetic force generated by the electromagnetic coil and the magnetic force of the permanent magnet as a driving source. This rotational force is transmitted directly or through a gear train to the rotating member, and is also transmitted to a hair spring or suspension spring, and when the return force of the hair spring or suspension spring becomes larger than the rotational force, the rotation member is reversed. It was something that was done.

In conventional devices in which the reversing action of the rotating member is performed by the return force of the hair spring, the rotational force is directly transmitted to the hair spring, so that the speed of forward or reverse rotation becomes extremely high. Therefore, it has been difficult to set a long cycle for switching the rotational direction of the rotating member.

Further, in the conventional device in which the reversing action of the rotating member is performed by the return force of a suspension spring suspended from the case, the rotational force is appropriately decelerated via the reduction wheel train. As a result, the rotational speed of the rotating member suspended by the hanging spring can be made lower than that of the above-mentioned device having a hair spring, and therefore the period in which the rotational direction of the rotating member is switched can be made longer. can. However, this conventional device has a very complicated structure, requires troublesome assembly work, and is therefore expensive to manufacture.

Furthermore, in the conventional device described above, the frequency at which the rotating member switches the rotation direction is affected by the material and length of the hair spring or suspension spring, so the frequency tends to vary depending on the product, making it difficult to unify the frequency.

The present invention was made in order to solve the above-mentioned conventional problems, and its purpose is to switch the rotational direction of the rotating member by using a gear train configuration having a partially toothed gear in which teeth are notched over a predetermined circumferential length. This is what you should do.

Another object of the present invention is that the structure is simple, and the rotation speed of the rotating member can be made low.
Also, it is possible to accurately set the cycle at which the rotation direction is switched.

In order to achieve this object, the present invention includes a clock wheel train, a rotating member having a forward rotation gear and a reverse rotation gear fixed coaxially to a rotating shaft, a first transmission wheel having a forward rotation drive gear that operates in conjunction with the clock wheel train to drive the forward rotation gear in a predetermined direction for a predetermined period of time, a second transmission wheel having a reverse drive gear that operates in conjunction with the first transmission wheel to drive the reverse rotation gear in a predetermined direction for a predetermined period of time, and either the forward rotation gear or reverse rotation gear of the rotating member and the forward rotation drive gear or reverse drive gear that can mesh with both of these gears are missing teeth gears with teeth cut out over a predetermined arc length, and the rotating member repeats forward and reverse rotation every predetermined period of time in conjunction with the clock wheel train.

The present invention will be described below based on an embodiment of the present invention shown in the drawings.

FIG. 1 is a sectional view of the rotary decoration device of the present invention.

Between the main plate 2 and the main plate 4 are a second wheel 6, a third wheel 8,
A clock mechanism including a minute wheel 10 is constructed, and although not shown, the rotation of a drive motor is appropriately decelerated, and the current time is displayed by a pointer fixed to a display axle such as the minute wheel 10. The third wheel 8 is slip-coupled to the third shaft 9, so that even if the minute wheel 10 is rotated by the operation of a hand setting mechanism (not shown), the rotation is transmitted to the first transmission wheel 12. It will not be done.

The first transmission wheel 12 is rotatably supported between the base plate 2 and the base plate 4, the first transmission wheel 14 meshes with the third gear 8, and the forward rotation drive gear 16 meshes with the forward rotation gear 26 of the rotating member 28. , and the second transmission wheel 18 meshing with the second transmission wheel 20. As shown in FIG. 2, the normal rotation drive gear 16 of the first transmission wheel 12 has bevel teeth formed only on the semicircular length.

The second transmission wheel 20 has a support shaft 21 erected on the main plate 4.
The second transmission wheel 20 is rotatably supported by a shaft, and as shown in FIG. 3, a reversing drive gear 22 having bevel teeth formed only along the semicircular length is integrally molded therein. The reverse rotation driving gear 22 is arranged so as to be able to mesh with the reverse rotation gear 27 of the rotating member 28.

The rotation shaft 24 of the rotation member 28 has a forward rotation drive gear 1.
Forward rotation gear 26 and reverse rotation drive gear 2 that can mesh with 6
A reversing gear 27 that can mesh with the rotating shaft 24 is fixed thereto, and the rotating shaft 24 is rotatably supported by the base plate 4 and the support plate 30.

The illustrated rotating decoration device is constructed as described above, and its operation will now be explained based on FIGS. 1, 4, and 5.

FIG. 1 shows a state in which the forward rotation driving gear 16 and the forward rotation gear 26 are in mesh with each other, and the rotating member 28 is shown as indicated by the arrow A.
rotating in the direction. The rotational speed of the third wheel 8 is set so that the rotation of the second hand wheel 6 is decelerated so that it rotates once every approximately 8 minutes. The rotation of the third wheel 8 is transmitted to the forward rotation gear 26 via the first transmission wheel 14 of the first transmission wheel 12 and the forward rotation driving gear 16.
The rotation speed of No. 6 is set so that it rotates once every approximately 4 minutes.

FIG. 4 shows a state in which the forward rotation drive gear 16 and the forward rotation gear 26 are disengaged, and the reverse rotation drive gear 22 and the reverse rotation gear 27 are about to be engaged. Therefore, the rotating member 28 is in a stopped state. This stopped state is extremely short, and immediately after that, when the reverse rotation driving gear 22 and the reverse rotation gear 27 mesh with each other, the rotating member 28 starts rotating in the direction of arrow B. In other words,
The rotation of the third wheel 8 is controlled by the first transmission wheel 14 and the second transmission wheel 1.
8. The rotational speed is transmitted to the reversing gear 27 via the second transmission wheel 20 and the reversing drive gear 22, and the rotational speed of the reversing gear 27 is set to rotate approximately once every quarter. After approximately 4 minutes have passed from the state shown in Figure 4,
As shown in FIG. 5, the meshing between the reverse rotation drive gear 22 and the reverse rotation gear 27 is released, and the forward rotation drive gear 16 and the forward rotation gear 26 are meshed again, so that the rotating member 28 rotates approximately every 4 minutes. It can rotate forward at the same rate of rotation.

In the illustrated embodiment, the rotating member 28 rotates forward or reverse at a rate of approximately one rotation per four minutes via the first transmission wheel 12 or the second transmission wheel 20. can do. As a result, the rotational speed of the rotating member 28 is extremely low, and almost no rotational inertia is generated in the rotating member 28.
Further, the period of forward and reverse rotation of the rotating member 28 is extremely long and accurate.

In the illustrated embodiment, the rotating member 28 is disposed below the clock mechanism, but the rotating member 28
Even if it is disposed above the clock mechanism, its operation and effect are the same as in the illustrated embodiment. Further, in the illustrated embodiment, the rotating shaft 24 of the rotating member 28 and the rotating shaft (third shaft 9) of the clock wheel train (third wheel 8) are arranged orthogonally by using a well-known bevel gear. However, it is also possible to arrange them in parallel by using conventionally well-known spur gears. In this case, the rotating member 28 can be rotated at low speed in the same direction or in the opposite direction to the rotating direction of the hand of the timepiece mechanism, and the period at which the rotating direction of the rotating member 28 changes is the same as in the illustrated embodiment. Furthermore, in the illustrated embodiment, the cycle at which the rotation of the rotating member 28 is switched can be arbitrarily set by appropriately setting the reduction ratios of the first transmission wheel 12, the second transmission wheel 20, etc. Furthermore, in the illustrated embodiment, the meshing timing with the forward rotation gear 26 or the reverse rotation gear 27 can be adjusted by notching the teeth by a predetermined circumferential length with respect to the forward rotation drive gear 16 and the reverse rotation drive gear 22. However, this can also be done by notching the teeth of the forward rotation gear 26 and the reverse rotation gear 27 by a predetermined circumferential length.

As explained in detail above, according to the present invention, the rotating decoration device is interlocked with the clock wheel train, and the rotating direction of the rotating member is determined by the forward and reverse gears coaxially fixed to the rotating shaft of the rotating member. In order to enable timely switching of meshing with the rotating member, the rotation of the rotating member is performed at an extremely low speed, and the rotational direction is The switching period is extremely accurate,
Can be done over long periods. Furthermore, since the device of the present invention is driven by a clock wheel train, its construction is extremely simple and its manufacturing cost is low.

[Brief explanation of the drawing]

Fig. 1 is a sectional view of the present invention, Fig. 2 is a plan view of the first transmission wheel, Fig. 3 is a plan view of the second transmission wheel, and Fig. 4 is a diagram of the rotating member immediately before it changes from normal rotation to reverse rotation. The sectional view, FIG. 5, is a sectional view immediately before the rotating member changes from reverse rotation to normal rotation. 8... Third wheel, 12... First transmission wheel, 16...
Forward rotation drive gear, 20...Second transmission wheel, 22...Reverse rotation drive gear, 26...Forward rotation gear, 27...Reverse rotation gear, 28...Rotating member.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) A clock wheel train, a rotating member having a forward rotation gear and a reverse rotation gear coaxially fixed to a rotating shaft, and a clock wheel train that rotates the forward rotation gear for a predetermined period of time. a first transmission wheel having a forward rotation driving gear that rotates in the normal direction; a second transmission wheel having a reverse rotation driving gear that interlocks with the first transmission wheel and drives the reverse rotation gear in the reverse direction for a predetermined time; Either the diversion gear or the reverse gear and the forward rotation drive gear or the reverse rotation drive gear that can mesh with both gears are cut-tooth gears with teeth cut out over a predetermined arc length. A rotating decoration device for a watch, characterized in that the first rotating member repeats forward and reverse rotation at predetermined time intervals in conjunction with the watch wheel train. (2) In the device set forth in claim 1 of the utility model registration claim, the forward rotation drive gear, the reverse rotation drive gear, and the forward rotation gear and the reverse rotation gear of the rotating member that can mesh with these two gears are bevel gears. A rotating clock decoration device featuring: (3) In the device according to claim 1 or 2 of the utility model registration claim, the first transmission wheel meshes with the third wheel of a clock wheel train, and the third wheel is in rotation with respect to its axis. A rotating decoration device for a watch, characterized in that the device is coupled with a slip.