JP2008064511A - Pendulum device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a pendulum device constituted more rationally. <P>SOLUTION: In this pendulum device equipped with a pendulum 100, a support 200 and a pendulum driving means 300, the pendulum is equipped with the first pendulum member 110 supported by the support, and the second pendulum member 120 connected to a lower part of the first pendulum member. Either of the first pendulum member and the second pendulum member is provided with a hook part 122, and the other is provided with a locking part 114 for locking the hook part. Furthermore, the first pendulum member is provided with a pair of projecting pieces 115 sandwiching the second pendulum member, and the pair of projecting pieces sandwiches the second pendulum member in the rocking direction of the pendulum. The second pendulum member is pressed between the pair of projecting pieces, and the pair of projecting pieces is deformed elastically and pressure contacted with the second pendulum member, to thereby prevent the position of the second pendulum member to the first pendulum member from being moved in the rocking direction of the pendulum. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a pendulum device used for decoration of a watch or the like.

Known wall clocks and table clocks are equipped with a pendulum device for decoration. The pendulum device is configured such that a pendulum provided with a magnet is supported by a support and a pendulum driving means that acts on the magnet is arranged outside the pendulum. This type of pendulum device is also disclosed in Patent Document 1. The pendulum device disclosed in Patent Document 1 uses a pendulum formed by assembling a plurality of members. By reversing the vertical position of the assembled member, the degree of freedom in setting the cycle can be increased. It has become possible.
JP 2005-140543 A

  In recent years, the design of watches has been increasingly diversified, and the above-described pendulum device is also desired to have excellent decorativeness and obtain more stable driving. In this regard, in the case of the pendulum formed by assembling a plurality of members as described above, a slight backlash between the members may cause disturbance in swinging of the pendulum. For example, if a position shift occurs due to some impact during driving, there is a possibility that the driving stops due to this. In particular, the swing period of the pendulum varies depending on the distance between the fulcrum of the pendulum and the center of gravity, but such inconvenience becomes significant when the swing period is relatively long (slowly swings). This invention is made | formed in view of this situation, The objective is to provide the pendulum apparatus comprised more rationally.

  The invention described in claim 1 of the present application is a pendulum device including a pendulum, a support body that swingably supports the pendulum, and a pendulum driving unit that swings the pendulum. A first pendulum member supported by the body and a second pendulum member connected to a lower portion of the first pendulum member, and a hook portion is provided on one of the first pendulum member and the second pendulum member. The other of them is provided with a locking part for locking the hook part, and further, the first pendulum member is provided with a pair of projecting pieces sandwiching the second pendulum member, The second pendulum member is sandwiched in the swinging direction of the pendulum, the second pendulum member is press-fitted between the pair of projecting pieces, and the pair of projecting pieces are elastically deformed to cause the second pendulum member to be pressed. By pressing against A pendulum device in which the position of the second pendulum member with respect to the pendulum member is prevented from moving in the swing direction of the pendulum.

The invention described in claim 2 of the present application is that in claim 1, wherein the mass of the second pendulum member is m, and from the contact portion between the hook portion and the locking portion to the center of gravity of the second pendulum member. When the distance is r and the moment due to the load of the projecting piece on the second pendulum is M, these are: mr <M
This is a pendulum device having a configuration of

  According to the present invention, a more rationally configured pendulum device can be obtained.

  Embodiments of the present invention will be described below in detail with reference to the drawings. A pendulum device 1 shown in FIG. 1 to FIG. 5 is incorporated in a watch case to decorate the watch. The pendulum device 1 includes a pendulum 100, a plate-like support 200 that supports the pendulum 100 so as to be swingable, and a pendulum drive unit 300 that swings the pendulum. A support 200 is mounted on the watch casing. In addition, the support 200 is provided with a movement 400 for driving the hands of the watch.

  The pendulum 100 is supported by a knife-edge-shaped shaft portion 210 provided on the support, and swings around the shaft portion 210. The pendulum driving means 300 swings the pendulum 100 by a magnetic action, and is provided at an important point of the support 200. Specifically, an induced voltage is generated in the detection coil when the magnet 111 provided in the pendulum 100 passes in the vicinity thereof, and when an induced voltage is generated in the detection coil, a current flows in the drive coil, and the drive coil becomes the magnet 111. The pendulum 100 is energized by repelling.

  This pendulum 100 is formed by assembling a first pendulum member 110 supported by a support 200 and a second pendulum member 120 connected to the lower portion of the first pendulum member 110. The first pendulum member 110 and the second pendulum member 120 are made of a synthetic resin-molded member. The first pendulum member 110 is provided with the magnet 111 described above, a hole 112 through which the shaft portion 210 is inserted, and a weight 113 having a predetermined weight. A swing ball 121 is provided on the second pendulum member 120.

  Next, a mechanism for connecting the first pendulum member 110 and the second pendulum member 120 will be described. In the case of this example, a hook portion 122 is provided on one of the first pendulum member 110 and the second pendulum member 120, and a locking portion 114 for locking the hook portion 122 is provided on the other of them. In the illustrated pendulum 100, a hook portion 122 is provided on the upper portion of the second pendulum member 120, and a locking portion 114 is provided on the lower portion of the first pendulum member 110. The locking portion 114 is provided with a taper that reduces the diameter corresponding to the width of the hook portion 122 from top to bottom. The hook portion 122 is guided by the taper and locked at a predetermined position. It has a configuration. It is also possible to provide the hook part 122 at the lower part of the first pendulum member 110 and the locking part 114 at the upper part of the second pendulum member 120. The second pendulum member 120 is suspended from the first pendulum member 110 by locking the hook portion 122 to the locking portion 114.

  Further, in this example, the first pendulum member 110 is provided with a pair of projecting pieces 115 that sandwich the second pendulum member 120. The pair of protruding pieces 115 sandwich the upper vicinity of the second pendulum member 120 in the swinging direction of the pendulum 100. The second pendulum member 120 locks the hook portion 122 to the locking portion 114 and press-fits between the pair of projecting pieces 115. The pair of projecting pieces 115 are parts integrally formed in the mold forming of the first pendulum member 110, and are elastically deformed to be pressed against the second pendulum member.

  In this manner, the pair of projecting pieces 115 are elastically deformed and pressed against the second pendulum member 120, so that the position of the second pendulum member 120 relative to the first pendulum member 110 does not move in the swinging direction of the pendulum 100. . Therefore, a remarkable effect that the swing of the pendulum 100 is reliably stabilized can be achieved.

In this example, the mass of the second pendulum member 120 is m, the distance from the contact portion between the hook portion 122 and the locking portion 114 to the center of gravity of the second pendulum member 120 is r, When the moment due to the load of the projecting piece 115 is M, these are mr <M
The relationship is established so that mr is the moment of the second pendulum member 120 relative to the first pendulum member 110. In order to fix the second pendulum member 120 so as not to move, it is desirable that the moment M due to the load of the projecting piece 115 is larger than the moment of the second pendulum member 120, and mr <M
According to the relationship, the second pendulum member 120 is firmly fixed to the first pendulum member 110, and the swing of the pendulum 100 is further stabilized.

  As described above, the pendulum device of this example achieves a remarkable effect that the swinging of the pendulum is reliably stabilized, and can be suitably used as a decoration for a timepiece. In addition, the configuration of each part in this example can be appropriately changed in design within the technical scope described in the claims, and is of course not limited to the illustrated example.

The pendulum device of the present invention can be suitably used as a decoration for a table clock or a wall clock.

It is a see-through | perspective front view which concerns on the Example of this invention and shows a pendulum apparatus. It is a see-through | perspective side view which concerns on the Example of this invention and shows a pendulum apparatus. It is a see-through | perspective front view which concerns on the Example of this invention and shows a pendulum. It is a see-through | perspective side view which concerns on the Example of this invention and shows a pendulum. (A) is a see-through | perspective front view which shows the principal part of a pendulum, (b) is a see-through | perspective side view which shows the principal part of a pendulum.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Pendulum device 100 Pendulum 110 1st pendulum member 111 Magnet 112 Hole part 113 Weight 114 Locking part 115 Protrusion piece 120 2nd pendulum member 121 Pendulum ball 122 Hook part 200 Support body 210 Shaft part 300 Pendulum drive means 400 Movement

Claims (2)

In a pendulum device comprising a pendulum, a support body that swingably supports the pendulum, and a pendulum drive unit that swings the pendulum,
The pendulum includes a first pendulum member supported by the support, and a second pendulum member coupled to a lower portion of the first pendulum member,
One of the first pendulum member and the second pendulum member is provided with a hook portion, and the other of them is provided with a locking portion for locking the hook portion,
Further, the first pendulum member is provided with a pair of projecting pieces sandwiching the second pendulum member,
The pair of projecting pieces sandwich the second pendulum member in the swinging direction of the pendulum,
The second pendulum member is press-fitted between the pair of projecting pieces,
The pair of projecting pieces are elastically deformed and pressed against the second pendulum member so that the position of the second pendulum member relative to the first pendulum member does not move in the swinging direction of the pendulum. A pendulum device. The mass of the second pendulum member is m, the distance from the contact portion between the hook portion and the locking portion to the center of gravity of the second pendulum member is r, and the load of the protrusion on the second pendulum When the moment is M, these are mr <M
The pendulum device according to claim 1, wherein

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