JPH0339748Y2 - - Google Patents

Description

[Detailed explanation of the idea] (Industrial application field) The present invention relates to a torsion pendulum device.

(Prior Art) Torsion pendulums have traditionally been used in table clocks and the like, but generally these pendulums are placed above the mechanical case and have come to function as interior decoration for a room. In this configuration, the rotation is driven by the magnetic action of a magnet housed in the mechanical case and the drive coil, and the rotation angle is regulated and reversed by the spring force of the hairspring.
It is constantly rotating repeatedly.

By the way, in order to further enhance the design effect of the timepiece as described above, the applicant of the present application reversed the positions of the conventional mechanical case and the torsion pendulum, and removed the plate-shaped swing body from the mechanical case. We proposed a system that was suspended through a wire (Utility Model Application Publication No. 55-62977).

However, in this type of clock, the shape of the torsion pendulum determines the overall image of the clock, so it is difficult to suspend a richly decorated torsion pendulum with a plate-shaped swing body like the one proposed above. The problem was how to suspend this torsion pendulum. Therefore, we devised a system in which a bifurcated hook was fixed to the lower end of the pendulum shaft, and the upper end of the torsion pendulum was hooked to this hook.

(Problem that the invention attempts to solve) However, this mounting structure for the torsion pendulum does not give an aesthetic sense at all from a design point of view, and it also causes unexpected external forces to be applied to the torsion pendulum, causing it to exceed a specified level. If the torsion pendulum is rotated too much, it can easily damage the balance spring, and if there is even a slight manufacturing error, the balance of the torsion pendulum will be greatly lost, and when the torsion pendulum is lowered,
This pendulum tilts, which can lead to damage to the pendulum shaft, and the pendulum may come off due to insufficient insertion during installation. Furthermore, it has been impossible to install a so-called double pendulum in which two pendulums are arranged coaxially.

Therefore, an object of the present invention is to provide a torsion pendulum device in which two torsion pendulums can be reliably mounted in a well-balanced manner, and in which the two torsion pendulums are suspended with a predetermined angular phase.

(Means for Solving the Problems) The present invention is characterized in that the first and second pendulum shafts are provided concentrically, and a pendulum support is provided at the lower end of each pendulum shaft. A locking portion is formed on the upper surface of each pendulum support, and at least three arm portions are formed in the axial direction of the main body of the torsion pendulum that is locked to the pendulum shaft, An engaging portion that can be placed on the locking portion is formed at the upper end of each arm, and one of the locking portion and the engaging portion is a recess and the other is a protrusion. It's there.

(Example) Hereinafter, an example of the present invention will be described with reference to the drawings.

In FIG. 1, a first pendulum shaft 1 serving as a drive shaft and a pipe-shaped second pendulum shaft 2 that rotates in conjunction with this shaft are arranged concentrically within a machine body case 3. It is provided in the center, and the lower end of each pendulum shaft 1, 2 is the lower case 3a of the machine body case 3.
It protrudes downward from the more protruding cylindrical portion _3a1 . Pendulum supports 6 and 7 are press-fitted into the lowermost ends of both the first and second pendulum shafts 1 and 2, respectively. The pendulum supports 6 and 7 are for supporting two torsion pendulums 4 and 5, respectively, which are locked with a predetermined angular phase.

As shown in FIGS. 2 to 4, the pendulum supports 6 and 7 have locking surfaces 6a and 6a curved outwardly around the entire outer periphery thereof.
7a is formed. Each locking part 6a, 7a has
first and second torsion pendulums 4 coaxially arranged;
Engaging portions 4c and 5c at the upper ends of four arm portions 4b and 5b provided in the axial direction of the cylindrical bodies 4a and 5a of No. 5 are engaged with each other. In order to further ensure the connection between the engaging parts 4c, 5c of the arm parts 4b, 5b and the pendulum supports 6, 7, the engaging parts 6a, 7a are provided with four locking parts as shown in the third and fourth figures. Locking recess 6 _a1 ,
7 _a1 are provided at equal intervals, and the engaging portion 4
Engagement protrusions 4 _c1 and 5 _c1 are provided inside the bulges of c and 5 c.
is formed. The projections 4 _c1 and 5 _c1 are placed in the locking recesses 6 _a1 and 7 _a1 .

The lower part of the first torsion pendulum body 4a projects downward from the lower end of the second torsion pendulum body 5a, as shown in FIG. It is installed.

Here, the structure of the drive mechanism for the first and second pendulum shafts 1 and 2 will be explained with reference to FIG.

A driving wheel 8 is fixed to the upper end of the first pendulum shaft 1, and this driving wheel has two yokes 9, 9 horizontally provided on one side at a constant interval, and both yokes. Magnets 10,1 on a disk are on the opposite surface of
0 is installed. A ring-shaped drive coil 11 is arranged between the magnets 10, 10.
The drive wheel 8 can be rotated in a predetermined direction by the magnetic action of the drive coil 11 and the magnet 10. Therefore, the first pendulum shaft 1 also has a drive wheel 8.
can be rotated in the same direction as Moreover, between the upper end of the first pendulum shaft 1 and the inner surface of the upper case 3b,
A hairspring 12 is provided, and the spring force of this spring regulates and reverses the rotation angle of the drive wheel 8 and the first pendulum shaft 1, so that they can always rotate in reverse at a predetermined angle. be.

Further, the rotational force of the first pendulum shaft 1 is transmitted to the second pendulum shaft 2 by a transmission mechanism. That is, the transmission gear 1 is placed in the middle part of the first pendulum shaft 1.
3 is fixed thereto, this gear has teeth on the lower side, and the lower end surface is close to the upper surface of the bearing 15 of the first intermediate plate 14. A first intermediate wheel 16 meshes with the transmission gear 13, an upper tooth portion of a second intermediate wheel 17 meshes with this intermediate wheel, and a lower tooth portion of the second intermediate wheel 17 meshes with the first intermediate wheel 16.
It meshes with a drive transmission gear 18 press-fitted into the upper part of the second pendulum shaft 2. The lower end surface of the drive transmission gear 18 is close to the inner side part 3 _a2 of the intermediate constriction part of the cylindrical part 3 _a1 of the lower case.

Therefore, when the first torsion pendulum 4 operates, the drive wheel 8 rotates due to the magnetic action between the magnet 10 and the drive coil 11, and the hairspring 1
2, and at the same time, the first pendulum shaft 1 also reversely rotates in the same direction as the drive wheel 8, so that the first pendulum shaft 1
The torsion pendulum 4 also rotates, for example, clockwise at a predetermined angle and reverses at the same angle. On the other hand, since the driving force of the pendulum shaft 1 is transmitted from the transmission gear 13 to the drive transmission gear 18 via the first and second intermediate wheels 16 and 17, the second pendulum shaft 2 rotates in reverse, and the second torsion pendulum 5 rotates in the opposite direction to the first torsion pendulum 4.

Note that the first and second pendulum shafts 1 and 2 descend due to the weight of the first and second torsion pendulums 4 and 5, and the lower end surface of the transmission gear 13 of the first pendulum shaft 1 is supported by a bearing. 15, and for the second pendulum shaft 2, the drive transmission gear 18 comes into contact with the inner side _3a2 of the cylindrical portion _3a1 , which may hinder the smooth rotation of the pendulum shaft due to frictional resistance. . Therefore, the upper outer peripheral part of the transmission gear 13 and the second intermediate plate 1
A pair of magnetic rings 19, 19a are provided at a predetermined distance between the two rings 4a, and the magnetic poles of both rings are configured to repel each other, so that the lower end surface of the transmission gear 13 is always spaced above the bearing 15. Similarly, a pair of magnet rings 19b and 19c are attached to the drive transmission gear 18 and the inner side _3a2 of the cylindrical portion _3a1 , and the drive transmission gear is floated by the repulsive force of both rings.

To explain how to attach the first and second torsion pendulums 4 and 5, put the upper end 5c of the arm 5b of the second torsion pendulum 5 against the lower end of the pendulum support 7 and push up the pendulum 5. , this arm portion elastically deforms outward, and eventually the projection 5 _c1 engages in the locking recess 7 _a1 . Similarly, the main body 4a of the first torsion pendulum 4 is
By inserting it into the main body 4a and pushing it up, the projection _4c1 of the upper end 4c of the arm 4b engages with the engagement recess _6a1 .

Locking portions 6a, 7a and arm portions 4b, 5 are means for connecting the pendulum supports 6, 7 and the torsion pendulums 4, 5.
As another example of the engaging portions 4c and 5c of b, the former may be composed of a locking surface, and the latter may be composed of a surface and a protrusion such as protrusion 4 _c1 or 5 _c1 , and the engagement portions 4 c and 5 c may be configured by mutual friction. It may be made to match.

(Effect of the invention) According to the invention, the arms of the first and second torsion pendulums are attached to the pendulum support body so as to surround the axis of the pendulum shaft. The pendulum can be reliably mounted in a well-balanced manner, and a plurality of hanging pendulums can be suspended with a predetermined angular phase.

[Brief explanation of the drawing]

Fig. 1 is a sectional view showing the attached state of the pendulum shaft and torsion pendulum arm, Fig. 2 is a partially cutaway enlarged sectional view, Fig. 3 is a sectional view taken along the line - Fig. 2, and Fig. 4 is a sectional view taken along the - line. , FIG. 5 is an explanatory view showing the attached state of the torsion pendulum. DESCRIPTION OF SYMBOLS 1...First pendulum axis, 2...Second pendulum axis, 3...Machine body case, 4...First torsion pendulum, 5...Second torsion pendulum, 4a, 5a...
...Torsion pendulum body, 4b, 5b...Arm part, 4
c, 4 _c1 , 5c, 5 _c1 ... engaging portion, 6, 7 ... pendulum support, 6a, 6 _a1 , 7a, 71a ... locking portion, 8 ... drive wheel, 10 ... magnet, 11 …
...Drive coil, 12... Hairspring, 13...
Transmission gear, 16, 17... intermediate wheel, 18... drive transmission gear.

Claims (1)

[Claims for Utility Model Registration] In a torsion pendulum device having a pendulum shaft hanging down from a mechanical case located at the upper part, and a torsion pendulum being hooked to the lower end of the pendulum shaft, the pendulum shaft consists of a first pendulum shaft serving as a drive shaft and a pipe-shaped second pendulum shaft disposed concentrically with the first pendulum shaft, and the first pendulum shaft has a drive wheel. The driving wheel is rotatably driven by the magnetic force of the magnet and the driving coil, and can be reversed by the spring force of the hairspring, and the first pendulum shaft has a transmission gear. The second pendulum shaft is provided with a drive transmission gear, and a rotational force is transmitted from the transmission gear to the drive transmission gear via an intermediate wheel, and the direction of rotation is determined by the transmission gear. A pendulum support is provided at the lower end of each of the first and second pendulum shafts, which is opposite to the gear, and each of the pendulum supports allows the first torsion pendulum and the second torsion pendulum to be connected to each other. is supported, a locking portion is formed on the upper surface of the pendulum support, and at least three arms are formed in the axial direction of the main body of the torsion pendulum, each arm An engaging part that can be placed on the locking part is formed at the upper end, and one of the locking part and the engaging part is a recess, and
A torsion pendulum device characterized in that the other side is a protrusion.