JPH0140106Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION This invention relates to a switch mechanism for an electronic timepiece suitable for operating and stopping a time display device as appropriate when adjusting the time.

Generally, in an electronic watch, in addition to a time adjustment mechanism that includes members such as a mandarin duck, a tsuzumi wheel, and a cannula, which are interlocked by pulling out the winding stem, when the time is adjusted, the time display device's hands, for example, are activated. A separate and independent switch mechanism is provided for stopping the operation. This conventional switch mechanism is
It is usually formed by a number of various parts such as a reset lever and a reset pin. Furthermore, these parts are arranged in a plane direction of the time adjustment mechanism, and the winding stem is formed with a complicated structure so that the pulling out operation is linked to the movement of a reset lever or the like.

In this way, in the past, first, the switch mechanism was provided independently, which increased the number of parts in the entire watch, making the structure complex, and also required a large space for the operation of each part of the switch. Put it away. In addition, because of the complicated structure, it is easy to cause malfunctions when pulling out the winding stem, and as a result, it becomes impossible to accurately adjust the time.

Therefore, it is an object of this invention to provide a switch mechanism for an electronic timepiece with a simple structure that stably operates and stops a time display device.

Therefore, in order to achieve this purpose, this idea
A movable member for time adjustment in which one contact portion is provided in a part of the movable member, and another elastic contact portion with which one of the contact portions comes into contact according to the movement of the movable member. a reset member attached to the support member in a direction perpendicular to the operating direction;
It is characterized in that the one contact portion is brought into contact with the other contact portion to stop sending out the hand movement pulse.

The features of this invention will become clearer from the following description of the illustrated embodiment.

FIG. 1 is a schematic plan view showing the switch mechanism of this invention in the normal hand movement state of an electronic timepiece. What is indicated by the reference numeral 10 in the figure is a circuit receiving member. The circuit receiving member is mounted on the base plate 12, as shown in FIG. A winding stem (not shown) is attached to the main plate in a radial direction so as to be slidable in the axial direction and rotatable around the axis. This winding stem has an engaging portion 1 of a mandarin duck 14 (not shown).
4a is engaged. The mandarin duck is supported by the main plate 12 so as to be swingable about the mandarin duck shaft 15. Further, a cannula 16 as a time adjustment member similar to this mandarin duck etc. is arranged adjacent to and on the same plane. This cannula is swingably supported around a cannula shaft 18, and its head 16a is engaged with a Tsuzuki wheel (not shown) held by the winding stem. Tail part 1 of Kannuki 16
6b extends toward the head 14b of the mandarin duck 14 and presses against the head. Also, Kannuki 16
The neck has a locking recess 20 on the side of the mandarin duck 14.
is provided. The foot portion 14c of the mandarin duck 14 is locked in the locking recess 20 of the dogfish 16. The opposite side of the locking recess 20 of this cannula 16 is formed to protrude, and this forms one contact portion 21 .

On the other hand, adjacent to the cannula 16 and perpendicular to its operating direction, a reset member 22 is connected to the circuit receiving member 1.
0 on the base plate 12. As shown in FIG. 2, the circuit receiving member 10 has a cylindrical protrusion 10a fitted into a hole 12a of the base plate 12. The reset member 22 has, at its base,
It is fitted into the protrusion 10a of the circuit receiving member 10. The reset member 22 is inserted from the circuit receiving member 10 to the reset member 2 as shown in FIG.
It is held by a plurality of fixing parts 10b that stand up with 2 in between. In this embodiment, the reset member 22 is entirely made of a plate-like elastic member.
Furthermore, as shown in FIG. 2, the reset member 22 is formed by being bent into a U-shape from the base between the circuit receiving member 10 and the circuit board 24. The reset member 22 has a branch portion 26 on the circuit receiving member 10 side.
The tip is formed slightly wider, and this constitutes the other contact portion 28. The branch portion 30 of the reset member 22 on the circuit board 24 side has both ends protruding toward the circuit board 24 side to form a contact portion 32. These contact portions elastically press the circuit board 24, thereby causing the reset member 22 to reset the circuit board 24.
It is conducting with 4.

In the normal hand movement state shown in FIG. 1, when the winding stem is first pulled outward in the radial direction of the watch, especially before adjusting the time, the mandarin duck 14 rotates clockwise, and its foot 14c The cannula 16 engages with the locking recess 20 of the cannula 16 and swings in the direction of the arrow in the figure, causing one contact portion 21 of the cannula 16 to come into contact with the other contact portion 28 of the reset member 22. Press. At this time, as shown by the imaginary line in the figure, the other contact portion 28
Because it bends elastically, both contact portions 21, 2
8, a constant contact pressure is always maintained, thereby ensuring that the switch mechanism is kept in the closed state. That is, the contact between both contact portions 21 and 28 causes the sending of hand movement pulses to the motor to be stopped, and the time display to be stopped. Then, it is possible to set the time to a predetermined time by a normal rotation operation of the time adjusting member such as the winding stem or mandrel.

After completing this time adjustment, if you want to return to the normal hand movement state, push in the winding stem and rotate the mandarin duck 14 counterclockwise in the figure. Locking recess 2
Disengage from 0. Then, Kannuki 16 was the first
The switch is returned to the original position shown by the solid line in the figure, and the one contact portion 21 is separated from the other contact portion 28 of the reset member 22 to open the switch mechanism.

In this invention, instead of the reset member 22 in the embodiment shown in FIGS. 1 and 2, a reset member 22' as shown in FIGS. 3 and 4 is used depending on the shape of the support member such as a circuit receiving member. Can be applied. First, in this other embodiment, as shown in FIG. 4, the circuit receiving member 10 on the base plate 12 is provided with a stepped portion 34 which is formed thicker toward the circuit board 24 side. A pair of fitting convex portions 34a are provided on the step portion to protrude toward the circuit board 24 side and come into contact with the circuit board 24 side. The reset member 22' has a wide conductive portion 36 sandwiched between the stepped portion 34 of the circuit receiving member 10 and the circuit board 12. The conductive part is
It is fitted into the fitting convex portion 34a of the stepped portion 34 through a pair of holes provided therein. The reset member 22' also has an elastic portion 38 that is bent from the conductive portion 36 and extends obliquely from the stepped portion 34. The tip of the elastic portion further extends along the circuit receiving member 10 and connects to the other contact portion 2 described above.
8'.

In this other embodiment, prior to adjusting the time, the cannula 16 is swung in the direction of the arrow in the figure in the same manner as described above, and one contact part 21 is connected to the other contact part 21 as shown by the imaginary line in the figure. 28' to deflect it, thereby leaving the switch mechanism in the closed position. At this time, the reset member 22'
Since the conductive portion 36 contacts the circuit board 12, the sending of the hand movement pulse to the motor is stopped.
This makes it possible to adjust the time.

According to this invention, the movable member for time adjustment is used as a component of the switch mechanism, rather than using a large number of separate parts or adding a complicated configuration, resulting in a significant reduction in the number of parts and a simpler structure. Simplification is achieved.

In addition, according to this invention, one contact part and the other contact part always come into contact with a constant contact pressure, so the switch mechanism can be opened and closed reliably and stably when adjusting the time. .

Further, according to this invention, since the switch member is disposed perpendicular to the operating direction of the movable member, the arrangement space is reduced, and the timepiece can be made smaller.

[Brief explanation of the drawing]

FIG. 1 is a schematic plan view showing the switch mechanism of the electronic timepiece according to this invention, and the circuit board is not shown. FIG. 2 is a schematic sectional view showing a switch mechanism similar to that in FIG. 1, with a circuit board added thereto. FIG. 3 shows the first embodiment of this invention.
4 is a schematic plan view similar to the figure, and FIG. 4 is a schematic cross-sectional view similar to FIG. 2 of another embodiment shown in FIG. 3. 10...Circuit receiving member, 14...Mandarin duck, 16
...Kanuki, 21...One contact part, 22,2
2'... Reset member, 28, 28'... Other contact portion.

Claims (1)

[Scope of utility model registration request] A movable member for time adjustment in which one contact portion is provided in a part thereof, and another elastic contact portion with which one of the contact portions comes into contact according to the movement of the movable member, and the movable member A switch mechanism for an electronic timepiece, comprising a reset member attached to a support member in a direction perpendicular to an operating direction, the one contact part being brought into contact with the other contact part to stop sending out a hand movement pulse.