JPS5937753Y2 - Electric clock cycle switching device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a cycle switching device for an electric clock or timer using an AC synchronous motor.

Conventionally, in electric watches using AC synchronous motors, there is a device that adjusts the rate of the watch by switching the watch drive wheel train when the frequency of the power source is 50Hz or 60Hz, but the structure is complex and the installation of the motor is difficult. The mechanism requires a special frame and is therefore not compatible with the frames used in ordinary electric clocks that do not have such a switching device.
There were many disadvantages and inconveniences in manufacturing and repair.

The present invention improves the above-mentioned conventional inconveniences, allows cycle switching with a simple structure, and allows the motor mounting frame to be used for clock mechanisms that do not use a normal cycle switching device. be.

To explain the -fll of the present invention with reference to the drawings, Fig. 1 is a plan view of the cycle switching device of the present invention applied when the power supply frequency is 50Hz, excluding the drive motor, and Fig. 2 is a plan view of the cycle switching device of the present invention applied when the power frequency is 50Hz. -n, 11 is a sectional view.

In the figure, 1 is a frame, 2 is a synchronous motor, and 2a is an output pinion of the synchronous motor 2.

3i/'i intermediate gear, 4 is the third gear, these gears 3
The lower part of each frame 1 is removably engaged with the corresponding shaft hole of the frame 1.

Reference numeral 5 designates a cycle changeover plate which is removably pivotally connected to the protrusion 1a of the frame 1 so that it can rotate about the protrusion 1a of the frame 1, and the output pinion 2a and the intermediate wheel are connected to the plate 5 depending on the rotational position of the sled. Two large and small cycle switching gears 6 and I that mesh with both of the frame 1 and I are pivotally protruded, and correspondingly, the setting bosses 1b and 1c on the frame 1 and fitting bosses 1b and 1c, respectively, are provided with setting bosses 1J-fL on the same plate. 5 near the grip portion 5a.

The small switching gear 7Fi on the switching plate 5 meshes with the output pinion 2a and the intermediate gear 30 and the wheel 3, and the small hole for determining 50 degrees on the switching plate is fitted into the boss 1b for determining 10 degrees on the frame.

Incidentally, the cycle switching large gear 6 constitutes upper and lower gears having different numbers of teeth.

Gears 3, 4, 6, 7 and cycle switching plate 5 as described above
A presser plate 8 is provided on the upper surface, and bosses 8a and 8 are provided on the lower surface of the same plate 8.
b, 8c are removably installed and covered by fitting into the corresponding small holes of the frame 1, and the boss shaft 8a bent at the corresponding location on the lower surface of the holding plate is located in the middle. The projection 1 of the frame 1 fits into the center hole of the gear 3, and the same
The tip of a presser spring 9 fitted into the upper part of the switch plate 8 and protruding from the receiving plate 8 presses against the upper surface of the switching plate 5 to press the same plate 5.

The motor 2 is mounted on the upper surface of the presser plate 8, and the guide pin on the lower surface of the motor 2 is tJ-fl, i d of the frame 1.
.

1e, and then attach the motor 2 to the set screw receiver 1f of the frame 1 with a set screw.

Fixed at 1g and 1h.

As a result, as described above, the output pinion 2a protrudes from the lower surface of the motor 2 and meshes with the cycle switching small gear I.

In this case, since the upper end of the third wheel 4 is close to the lower surface of the motor 2, the third wheel 4 is prevented from slipping upward.

In this way, with the configuration of the gear train as shown in FIGS. 1 and 2, when the frequency of the power source is 50H2, the rotation of the output pinion 2a of the motor 2 is controlled by the cycle switching pinion 7.
→ Intermediate gear → Third wheel 4 → Second wheel → Minute wheel, and the clock is driven.

Next, in the above configuration, when the power frequency is 60 Hz, holding the grip portion 5a of the cycle switching plate 5 and rotating it to the right using the protrusion 1a of the frame 1 as a fulcrum, the frame 10-degree determining boss is rotated. The fitting between 1b and the small hole for determining the 50 degrees of the switching plate comes off against the elasticity of the presser spring 9, and eventually the frame 10 degree determining boss 1c and the other small hole for determining the degree of the switching plate 5 are fitted together. At the same time, the output pinion 2a meshes with the cycle switching gear 6 (upper side), and the lower switching gear 6a meshes with the intermediate gear 3, resulting in the state shown in FIG. 3 and FIG. 4.

In this way, when the frequency of the power supply is 60Hz, the rotation of the output pinion 2a of the motor 2 is transmitted from the cycle cutting canine gear 6 to the lower cutting gear 6a to the intermediate gear 3 to the third gear 4, and the clock is activated. is driven.

Next, in the cycle switching device of the present invention as described above,
By removing the cycle switching plate 5, presser plate 8 and intermediate wheel 3, as shown in FIGS. 5 and 6, an intermediate large gear 31 that meshes with both the output pinion 2a of the motor 2 and the third wheel 4 is provided
is removably connected to the corresponding shaft hole of the frame 1, and the motor 2 is mounted and fixed on the upper surface of the motor 2, so that the electric Clock can be configured.

In this case, the rotation of the motor 2 is transmitted from the output pinion 2a to the intermediate dog gear 3' to the third gear 4 to drive the clock.

As described above, the cycle switching device according to the present invention has a simple structure and a small number of parts, and if the switching plate 5 and presser plate 8 are removed, an electric watch without a cycle switching device can be constructed. Therefore, there are various conveniences in the manufacturing process and in repairs.

Incidentally, in the above explanation of the present invention, the cycle switching large gear 6 was assumed to constitute two stages of upper and lower gears with different numbers of teeth, but from calculation of the gear ratio, this means that the large and small cycle switching gears 6 and 1 or the intermediate gear 3 It is possible to configure two stages of upper and lower gears having different numbers of teeth.

[Brief explanation of the drawing]

Figure 1 is a plan view of the cycle switching device of the present invention applied to the case of a 50Hz frequency, Figure 2 is a partial cross-sectional view taken along the ■-n line in Figure 1, and Figure 3 is the same applied to the case of a 60Hz frequency. Plan view of the proposed device, Figure 4 I/i Figure 3 ■-
Fig. 5 is a plan view of the mechanism in which the cycle switching plate and presser plate have been removed from the proposed device and an intermediate large gear has been provided, and Fig. 6 is a partial cross-sectional view taken along the line IV-IV in Fig. 5. FIG. Throughout each figure, 1 is the clock frame, 2 is the synchronous motor, and 3
is an intermediate gear, 4 is a third gear, 5 is a cycle switching plate, 6 is a large cycle switching gear, 7 is a small gear, 8 is a holding plate,
Reference numeral 9 indicates a presser spring.

Claims (1)

[Claims for Utility Model Registration] An intermediate gear 3 that meshes with the third gear 4 of a clock mechanism and is removably connected to the frame 1, and a rotatable cycle switching plate that is pivotally connected to the protrusion 1a of the frame 1. 5. The output pinion 2a of the motor 2 changes depending on the rotational position of the switching plate 5.
and intermediate gear 3, two large and small cycle switching gears 6 and I, provided that the above two cycle switching gears 6
Either I or the intermediate gear 3 constitutes a two-stage gear with a different number of upper and lower teeth, and the degree setting lb on the frame 1 corresponds to the rotational position of the switching plate 50. 1c and the small holes of the switching plate 5 that fit into the gears 3 and 3, respectively.
, 4, 6, 7 and the upper surface of the switching plate 5 to cover and support the intermediate gear 3 and the upper side of the protrusion 1a of the frame 1. A cycle switching device for an electric watch, comprising a presser spring 9 for pressing the plate 5, and a removable synchronous motor attached to the upper surface of the presser plate 8 and having an output pinion 2a on the lower side.