JPH026389Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field] The present invention relates to a pendulum mechanism for a timepiece that has an improved support structure for a swinging rod.

[Prior art]

Conventionally, some decorative clocks have been equipped with a pseudo-pendulum for mere decoration, and the pendulum mechanism of these conventional clocks has a structure as shown in FIG. That is, in the figure, cylindrical protrusions 10a and 12a are formed on the lower plate 10 and upper plate 12, which are the receiving plates of the watch, respectively, and on the upper surface of the protrusions 10a, there is a V along the side line, which is the knife edge support part.
A groove 10b having a letter-shaped cross section is formed. On the other hand, the upper part of the swing rod 14 is a cylindrical support part 14a having an inner diameter larger than the outer diameter of the protrusion 10a,
A knife edge 14b, which is a linear projection, is formed above the inner surface of the support portion 14a. As shown in the figure, after assembly, the knife edge 14b engages with the groove 10b, and the swinging rod 14 is attached to the lower plate 10.
and the upper plate 12.

However, such a conventional pendulum mechanism has a structure in which the knife edge 14b is supported over the entire length, and the knife edge 14b that is engaged during machining is
Since it is difficult to achieve linearity in the line contact portion of the groove 10b, the span of the knife edge 14b cannot be made very long, and as a result, there is a drawback that stability in the swinging motion of the swinging rod is poor.

[Purpose of invention]

The present invention was devised in view of the drawbacks of the conventional techniques, and its purpose is to provide a pendulum mechanism for a timepiece that allows the pendulum to swing stably.

[Structure of the idea]

In order to achieve this object, the present invention pivots a knife edge support with a relatively long span between both receiving plates of a timepiece so as to be able to swing freely at both ends in the longitudinal direction. A knife edge support part having a relatively short shaft length is formed on the inner surface of both ends, and an opening is formed in the bottom part of the knife edge support body in an inclined state through which the knife edge part of the swing rod can pass from below. It is characterized by

[Example of idea]

Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.

In FIG. 2, a knife edge support 20 with a relatively long span, which is swingably supported between both receiving plates 16 and 18 of the timepiece, has a substantially rectangular shape as shown in FIG. Knife edge supports 22 and 24 having a relatively short shaft length and each having a V-shaped groove are formed on the inner surface of both ends in the longitudinal direction of the support body 20, and on the outer surface of both ends of the knife edge support 20 in the longitudinal direction. are integrally formed with pins 26 and 28 for inserting into shaft holes 16a and 18a formed in the receiving plates 16 and 18 of the watch to swingably support the support body 20 between the receiving plates 16 and 18. has been done. Further, an opening 20a is formed in the bottom surface of the knife edge support 20.

On the other hand, a long-span knife edge portion 32 that fits within the knife edge support 20 is integrally formed on the upper part of the swinging rod 30, and the knife edge support portions 22, knife edge 32a that engages with 24;
and 32b are formed.

With this swing rod 30 tilted in the direction of arrow A shown in FIG.
Pass through the knife edge part 32 of the swinging rod 30 from 0a, and with the knife edge part 32 in a horizontal state, the knife edges 32a and 32b are attached to the knife edge support part 2.
2, 24, and in this state, insert the knife edge support 20 between the receiving plates 16, 18 with the pins 26, 28.
It is pivoted so that it can swing freely.

As described above, the knife edge portion 32 of the swinging rod 30
Since the parts that support the knife edge support 20 are the knife edge support parts 22 and 24 with a relatively short axis length formed at both inner ends in the longitudinal direction of the knife edge support 20, the span of the knife edge support 20 can be increased, and accordingly, the span of the knife edge support 20 can be increased. Knife edge part 3 that supports the swinging rod
Since the distance between the two knife edges 32a and 32b can be increased, stability in swinging of the pendulum is improved.

[Effect of idea]

As explained above, according to the present invention, the knife edges at both ends of the knife edge part formed integrally with the swinging rod are supported by the relatively short knife edge parts formed at both inner ends of the knife edge support body having a relatively long span. This has the effect of improving the stability of the pendulum when it swings.

[Brief explanation of the drawing]

Figure 1 shows the pendulum mechanism of a conventional watch, Figure 2 is a sectional view showing the support structure of the swing rod, which is the main part of the present invention, Figure 3 is a perspective view of the knife edge support, and Figure 4 shows the pendulum mechanism of the pendulum. It is a perspective view which shows the state supported by the knife edge support body. 16, 18...Watch plate, 16a, 18b...
...Shaft hole, 20...Knife edge support, 20a...
...Opening, 22, 24...Knife edge support part, 2
6, 28...pin, 30...swing rod, 32a, 32
b...Knife Edge.

Claims (1)

[Scope of utility model registration request] In a pendulum mechanism for a timepiece in which a knife edge formed integrally with a swinging rod is supported on a knife edge support section provided between both receiving plates of the timepiece, thereby allowing the swinging rod to swing freely, a relatively long distance between said receiving plates is provided. A knife edge support of a span is pivotally supported at both longitudinal ends thereof, and a knife edge support portion having a relatively short shaft support length is formed on the inner surface of both shaft support side ends of the knife edge support. A pendulum mechanism for a timepiece, characterized in that a bottom surface of the knife edge support has an opening through which the knife edge of the swinging rod can pass from below.