JPS6213034Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a reciprocating rotating device used in a torsion pendulum type clock or the like.

A table clock called a torsion pendulum is an old one, in which a rotating pendulum is suspended by a thin leaf spring, and the pendulum is rotated back and forth using the inertia of the rotating pendulum as a weight and the torsional elasticity of the leaf spring. It is known from
In order to improve the drawbacks of low clock accuracy and susceptibility to external vibrations and shocks, in recent years a shaft fixed at the center of a rotating pendulum has been rotated back and forth using a drive mechanism such as a transistor clock. something is being developed.

FIG. 1 shows a structural diagram of this type of reciprocating rotating device conventionally used, and FIG. 2 shows a plan layout. In the figure, reference numeral 1 denotes an output shaft from which the ultimately required reciprocating rotational movement is extracted, and a decorative swinging ball 2, for example, is fixed to this. This output shaft 1 is supported between a case upper plate and a lower plate 3 (not shown), and is rotated by an output wheel 4 fixed coaxially. The output wheel 4 is driven and rotated by an electromagnetic balance type motor via a gear (not shown), but the reversing boss 5 provided on the lower surface collides with the reversing leaf spring 6 provided on the lower plate 3. However, the direction of rotation is reversed due to the reaction.

As is clear from the above, in such a configuration, the deflection angle of the output vehicle 4 is limited to within 360 degrees. Further, since the electromagnetic balance type motor used as a drive source does not start automatically, it is necessary to provide a starter, but in this case, a separate part is required.

The present invention was developed in view of these circumstances, and its purpose is to provide a reciprocating rotating device that has a simple configuration, can obtain any rotational output including 360 degrees or more, and does not require special parts as a starter. It's about doing.

In order to achieve this purpose, the present invention
A reversing wheel made of gears is further provided at the rear stage of the output wheel, and this reversing wheel is regulated by a locking part to rotate back and forth, and a part of the reversing wheel is made to protrude outside the case.

Hereinafter, the present invention will be explained in detail using examples.

FIG. 3 is a structural diagram showing an embodiment of the present invention applied to a torsion pendulum type timepiece, and FIG. 4 is a plan layout diagram showing a part thereof. In the figure, reference numeral 11 denotes an electromagnetic balance type motor, which is composed of a permanent magnet body 13 having a rotating shaft 12, and a coil 15 consisting of a magnetic flux change detection coil and a drive coil fixed to a circuit board 14. 16 and 17 are disks fixed concentrically to the rotating shaft 12 at a constant interval, and on the inner surface thereof are permanent magnets 18, 19 with mutually different polarities and a weight 20 for balancing them. , 21 are fixed facing each other. Coil 15 is located between these discs 16,17. When the permanent magnets 18 and 19 rotate, a current is generated in the detection coil as the magnetic flux changes, and conversely, this is amplified and passed through the drive coil, thereby generating magnetic flux and rotating the permanent magnets. The rotational motion thus obtained is transmitted to the output wheel 23 made of gears via the pinion portion 22 fixed to the rotating shaft 12, and rotates the output shaft 24 fixed to the output wheel 23. The output shaft 24 is rotatably supported between a case upper plate 25 and a case lower plate 26, and a decorative swinging ball 27 is fixed to the top end of the output shaft 24, and the decorative swinging ball 27 is rotated. In addition, output shaft 2
4 is connected to a reversing wheel 28 via a pinion portion 24a. The reversing wheel 28 is a sector-shaped gear as shown in FIG. 4, and is comprised of a gear having a speed ratio of 1 or less with respect to the output wheel 23. A leaf spring part 29 as a first locking part for reversal is provided on the opposite side of the fan-shaped part, and its tip protrudes from a hole in the case side wall 30 to the outside of the case. Two pins 31 as a second locking part are inserted so as to sandwich this plate spring part 29,
32 are erected on the case lower plate 26 at regular intervals.

In the above configuration, the reversing wheel 28 rotates in a fixed direction as the output shaft 24 rotates, and the leaf spring portion 29
collides with one of the two pins, for example 31, then
The reaction reverses the direction of rotation, and the output shaft 24 also rotates in the opposite direction. Then, when the leaf spring part 29 collides with the other pin 32, the rotation direction is reversed again, and in this way, the reversing wheel 28 reciprocates at the rotation angle defined by the locking part, and the output is generated accordingly. axis 24,
Therefore, the direction of rotation of the decorative swinging ball 27 is also reversed. At this time, since the speed ratio of the reversing wheel 28 to the output wheel 23 is set to 1 or less, the output shaft 23
can be rotated back and forth with a rotation angle of more than 360 degrees. Further, since the tip of the leaf spring portion 29 protrudes to the outside of the case, this protrusion can be used as a starter, and there is no need to provide any other starter.

Note that the rotation angle of the output shaft 24 can be arbitrarily set by changing the speed ratio between the output wheel 23 and the reversing wheel 28 and the interval between the pins 31 and 32.

In addition, in the embodiment described above, the leaf spring part 29, which extends parallel to the case lower plate as the first locking part, and the second
A case has been described in which two pins 31 and 32, which are set upright on the case lower plate at a constant interval so as to sandwich the leaf spring part 29, are used as the locking part.
The present invention is not limited to this, and these locking portions may be of any type as long as they define the rotation angle of the reversing wheel upon collision. For example, a configuration may be adopted in which the number of pins is one, and two protruding hook-shaped locking portions are provided on the reversing wheel side so as to sandwich the pin.

Furthermore, in the embodiments described above, a fan-shaped gear was used as the reversing wheel. This is because the rotation angle is regulated as mentioned above, so there is no need for teeth around the entire circumference, and it would be better to remove unnecessary parts to save space, but the present invention Needless to say, the present invention is not limited to this, and ordinary gears may be used. In connection with this, in the above-described embodiment, a locking portion for reversal was provided in a portion excluding unnecessary tooth portions, but it goes without saying that there is no particular restriction on this either. Similarly, in the above-described embodiment, the distal end of the locking portion is used as a starter and protrudes outside the case, but it is also possible to provide the locking portion and the protruding portion as a starter separately.

Furthermore, there are no restrictions on the structure of the electromagnetic balance type motor; for example, it may be constructed using a single disc and permanent magnets with different polarities alternately magnetized in a plane. be.

As explained above, the present invention has a simple configuration in which a reversing wheel is further provided at the rear stage of the output vehicle, and the locking part fixed to the reversing wheel is reversed by the reaction of colliding with the case fixed to the case. The rotation angle of the output shaft can be set arbitrarily, including 360 degrees or more.
Furthermore, by providing a portion of the reversing wheel with a protruding portion that protrudes to the outside of the case, this can be used as a starter, eliminating the need to incorporate any other dedicated parts.

[Brief explanation of the drawing]

Fig. 1 is a structural diagram showing an example of a conventional reciprocating rotation device, Fig. 2 is a plan layout diagram, Fig. 3 is a structural diagram showing an embodiment of the present invention, and Fig. 4 is a part thereof. FIG. 11... Electromagnetic balance type motor, 15... Coil, 18, 19... Permanent magnet, 23... Output wheel,
24... Output shaft, 26... Case lower plate, 28...
Reversing wheel, 29... Leaf spring (first locking part), 30
... Case side wall, 31, 32 ... Pin (second locking part).

Claims (1)

[Scope of utility model registration request] An output wheel consisting of a gear fixed coaxially to the output shaft and transmitting the rotational motion of the electromagnetic balance motor to the output shaft, and a first locking consisting of a gear located after the output wheel and fixed to the gear. and a second locking part fixed to the case that collides with the reversing wheel that reciprocates at a rotation angle defined by the locking part and a second locking part fixed to the case that collides with the reversing wheel, and a protruding part that protrudes to the outside of the case on a part of the reversing wheel. A reciprocating rotation device characterized by being provided with.