JP2600158B2 - Electronic clock - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electronic timepiece that enables two states, that is, normal timepiece and time correction.

[Summary of the Invention] The present invention relates to a timepiece structure, in which the engagement between a second wheel and a third wheel with a minute hand is detached and attached by a clutch plate interlocking with an external operating member, and rotation to a fourth wheel with a second hand is performed. To provide an electronic timepiece that allows hour and minute times to be adjusted without telling.

[Prior art] The conventional wheel train structure using an electronic timepiece is equipped with a gear wheel having a center wheel and a pinion and having a truly central elasticity. By turning around, it is possible to correct the hour and minute without transmitting rotation to the fourth wheel.

[Problems to be Solved by the Invention] However, according to the conventional electronic timepiece, since the spring elastic portion is formed in the second gear having an outer diameter of about 3 mm, there is not enough room for the spring design, and the following problems exist. doing.

1. Because the sliding torque is not stable, the spring must be run-in.

2. If the component variation is large and the sliding torque is too high, the external correction mechanism (second pinion, minute wheel, small iron wheel, pinion wheel, etc.) will be worn or damaged. Therefore, a metal material or a quenching process must be used for the external correction mechanism component, and cost reduction cannot be achieved.

In recent years, with the improvement of plastic materials and molding technology,
Although a gear train structure made of an all-plastic material has been sought, it has been difficult to realize the gear train structure using this sliding mechanism.

3. On the other hand, if the sliding torque is too low, a slight impact will cause a rotation moment to be applied to the minute hand in a portable state, causing a sliding phenomenon, and the minute hand will rotate independently, resulting in a time disorder.

Therefore, the present invention solves such a problem,
Conventionally, the gear slip mechanism by the minute spring torque of the second wheel was abolished, the clutch structure that partially disengages the wheel train when the time was adjusted, and a simple and low-cost structure that combined a switch function with this clutch structure was achieved. The aim is to get an electronic watch.

[Means for Solving the Problems] In order to solve the above problems, the electronic timepiece of the present invention includes:
A base plate that is a clock base frame, an external operation member, a clutch plate that works in conjunction with the external operation member, a fourth wheel, a third wheel, and a second wheel with a minute hand that transmit the rotation of the drive source to each hand wheel, An electronic timepiece comprising a row of minute wheels that mesh with the second wheel and a series of pinwheels that always mesh with the minute wheel, wherein the clutch plate guides and holds a part of the wheel train member. 4-d and rigid portions 4-b and 4 guided by the main plate
-E, an elastic portion 4-a that abuts on the external operation member, and an elastic portion 4-c that operates the clutch plate.
The rigid body portion 4-b abuts on the dowel 1-b provided on the main plate by the reaction force of a to guide the car of the train, and at the time of time adjustment, interlocks with the pull-out of the external operation member. It is characterized in that the meshing between the wheel trains is removably displaced in a plane.

Embodiment An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a plan view of the present invention in a normal portable state. FIG. 2 is a plan view in a time correction state. 3 to 6 are cross-sectional views of the main parts.

In order to fix the second and correct the hour and minute, it is conceivable to engage / detach between the second gear and the third pinion or to detach and attach between the third wheel and the fourth pinion. This embodiment is the former example and will be described below with reference to the drawings.

1 is a base plate made of plastic material which is a clock frame, 2
Is a winding stem which is an external operation member. Makima is usually carried,
A concave portion 2-a that loosely engages with the continuous wheel 3, a convex portion 2-b that frictionally engages with the continuous wheel when the winding stem is pulled out at the time correction;
And click part 2 positioned by battery plus terminal
-C.

 The wheel 3 is made of a plastic material.

Reference numeral 4 denotes a clutch plate, and a lower handle 5 of a third wheel 5 on the clutch plate.
-C has a guide portion 4-d for guiding and holding, and is guided by a shaft 1-a provided on the main plate. The elastic portion 4-a receives a force from the end of the winding stem, and the clutch plate rotates counterclockwise around the shaft 1-a.

The rigid portion 4-b of the clutch plate comes into contact with the main plate dowel 1-b, and positioning of the third wheel & pinion in the normal portable state is performed.
The main plate dowel position is provided outside the distance between the guide shaft 1-a and the guide portion 4-d that guides and holds the lower handle of the third wheel of the clutch plate, thereby suppressing variations in accuracy between the wheel train meshing distances. The clutch plate is provided with an elastic body 4-c which applies a clockwise rotational force when the winding stem is pulled out.
hook on a.

The elastic forces at the two positions of the clutch plate are set such that the counterclockwise moment> clockwise moment when viewed from the moment at the guide shaft.

The third wheel 5 is made of a plastic material integrally formed with a gear 5-a and a pinion 5-b.

Reference numeral 6 denotes a second wheel, which is formed of a plastic material integrally formed with a minute hand at the end thereof and a gear 6-a and a kana 6-b.

Reference numeral 7 denotes a minute wheel, which is made of a plastic material integrally formed with a gear 7-a and a pinion 7-b, and always meshes with a second pinion and a toothed wheel of a pinion. That is, the ratchet wheel is driven by the minute wheel, and normally rotates the winding stem in the portable state. Reference numeral 8 denotes an hour wheel having an hour hand attached to the tip. Reference numeral 9 denotes a fourth wheel with a second hand attached to the tip.

The fourth wheel is made of a plastic material integrally formed with a gear 9-a and a kana 9-b.

The gear train portion is composed of a fifth wheel & pinion 10 and a rotor 11, each of which is made of a plastic material.

Reference numeral 12 denotes a train wheel train, which guides a rotor, a fifth wheel, a fourth wheel, a third wheel, and a fine wheel of a minute wheel. Except for the third wheel, the lower handle of each wheel is guided and held by the main plate 1. 13 is a coil block, 15 is a circuit block, 16 is a battery, and 17 is a battery negative terminal, which performs a known function. Reference numeral 18 denotes a battery plus terminal, which contacts the battery with the elastic portion 18-a and conducts a plus potential to the circuit.

The rotor is rotated by an electric signal, and the speed is reduced by a gear train. In each wheel, seconds, minutes, and hours are displayed in an analog manner to perform a known function.

 Next, the time correction state will be described.

When the winding stem 2 is pulled out, the rigid portion 4-e of the clutch plate 4 comes into contact with the reset pin 19 about the axis 1-a on the main plate as a center of rotation due to the clockwise rotational force generated by the elastic portion 4-c. Rotate up to.

Along with this, the guide portion 4-d for guiding and holding the lower handle of the third wheel provided on the clutch plate operates, and the third wheel tilts using the third wheel side of the train wheel as a guide, and the third wheel 5-b. And second wheel 6-a
Is disengaged.

In conjunction with this, the pinwheel 3 is engaged with the winding stem convex portion 2-b by interference, and transmits the rotation of the winding stem to the reverse gear of the day and the second wheel, and the reverse pinion and the hour wheel. Enables time correction for hours and minutes.

In this state, the battery plus terminal-coil block 13 (core
21) -Stator 20-Clutch plate-Reset pin-Circuit pattern and the positive potential are conducted, and the reset function operates at time correction to stop the drive current of the circuit.

In this way, by disengaging the second gear and the third pinion by the clutch, the sliding mechanism is not required in the wheel train, the rotational load at the time correction can be almost zero, and the disadvantage of the conventional structure described above is eliminated. At the same time, all of the train wheel members can be made of plastic, so that the production can be simplified and the cost of parts can be reduced.

A clock function can be added with a relatively simple structure by making the shoulder and the clutch plate also function as a switch member and by providing a reset function.

That is, as described above, in the simplified timepiece structure, only the winding stem and the clutch plate have a change in the position in the two states of normal carrying and time correction. Being able to equip the additional function by using the movement can reduce the number of parts, simplify the structure, and reduce the cost of the timepiece.

In the above embodiment, the clutch plate was directly operated by the external operation member. However, the clutch plate may be operated via another member, or the engagement and disengagement between the second gear and the third pinion may be performed. However, the attachment and detachment may be performed between the third gear and the fourth pinion.

Further, in the description, the lower handle is operated to perform the detaching action, but the upper and lower handles may be simultaneously operated to be detached from the train wheel portion.

Further, in the description, the embodiment has the reset function by abutting the clutch plate and the reset pin at the time of time correction.
A switch function may be used in which the clutch plate guiding dowel for normal carrying is formed of a metal shaft to conduct a positive potential to the circuit pattern and stop the circuit oscillation by the movement of the clutch plate at the time of time correction.

[Effects of the Invention] The present invention provides a base plate serving as a timepiece base frame, an external operating member, a clutch plate interlocked with the external operating member, a fourth wheel and a third wheel having a second hand for transmitting rotation of a drive source to each of the indicating wheels. An electronic timepiece comprising a wheel, a second wheel with a minute hand, a minute wheel that meshes with the second wheel, and a wheel train of a continuous wheel that always meshes with the minute wheel, wherein the clutch plate is the wheel train member. Guide part 4-d for guiding and holding a part of the rigid body, and rigid parts 4-b and 4 guided by the main plate.
-E, an elastic portion 4-a that abuts on the external operation member, and an elastic portion 4-c that operates the clutch plate.
The rigid body portion 4-b abuts on the dowel 1-b provided on the main plate by the reaction force of a to guide the car in the train, and at the time of time adjustment, interlocks with the pull-out operation of the external operation member. By displacing the meshing between the wheel trains so as to be detachable in a planar manner, the clutch plate is normally attached to the dowel 1-b provided on the base plate by the reaction force of the elastic portion 4-a during carrying. -B abuts and guides the third kana by the guide part 4-d.

Therefore, since all the members related to the meshing accuracy of the second gear and the third pinion are formed of rigid parts, even if all the gears and the pinions forming the wheel train are made of plastic, variations in the wheel train meshing center distance are reduced. It is possible to provide an electronic timepiece that can be pressed by a clutch plate and can prevent problems such as stop of a pointer due to variation in meshing of a train wheel.

[Brief description of the drawings]

FIG. 1 is a plan view showing an embodiment of the present invention in a normal portable state. FIG. 2 is a plan view of a time correction state. 3 to 6 are cross-sectional views of a main part of the present invention. 2 ... External operation member 3 ... Stick wheel 4 ... Clutch plate 5 ... Third wheel 6 ... Second wheel 7 ... Day wheel 9 ... Fourth wheel 15 ... Circuit block 19 ... Reset pin

Claims (1)

(57) [Claims] 1. A fourth wheel, a third wheel and a minute hand with a second hand for transmitting a rotation of a drive source to each of the handwheels, a main plate serving as a timepiece base frame, an external operating member, a clutch plate interlocked with the external operating member. An electronic timepiece comprising a second wheel attached, a minute wheel that meshes with the second wheel, and a wheel train of a continuous wheel that always meshes with the minute wheel, wherein the clutch plate is a part of the wheel train member. A guide portion 4-d for guiding and holding, and rigid portions 4-b and 4- guided by the main plate.
e, an elastic portion 4-a that abuts on the external operation member, and an elastic portion 4-c that operates the clutch plate.
The rigid body portion 4-b abuts the dowel 1-b provided on the main plate by the reaction force of the above, thereby guiding the car of the wheel train. An electronic timepiece characterized in that meshing between wheel trains is detachably displaced in a plane.