JPH10142357A - Electronic clock with power generation device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce cost without being affected by magnetism by arranging a power generation device to minimize the influence to a clock module from a generation motor. SOLUTION: The rotation of a rotary weight 8 is increased by a weight pinion 9 and an intermediate wheel 10, a magnet 11 for power generation is rotated speedily, and the magneic force of the magnet 11 for power generation generates electricity at a coil 13 for power generation through a stator 12 for generation and the coil 13 for generation. Also, a rechargeable battery 18 is located at a position for arranging a battery in a clock module 2 as a function for accumulating a generated electrical energy, and the module 2 is driven with the rechargeable battery 18 as a power supply. A coil for driving a clock deviates toward the opposite side of a winding system 6 of the outer periphery of the clock module 2. By arranging the coil 13 for power generation at the side of the winding system 6 of the clock module 2, the coil 13 can be located far away from a coil 7 for drive in the clock module 2, thus preventing the magnetic influence from the power generation magnet 11 occurring on power generation.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an arrangement of a power generating unit of an electronic timepiece having a rotating weight and a time display clock module.

[0002]

2. Description of the Related Art In an electronic timepiece with a power generating device having a rotating weight, when the hour, minute, and second are indicated by hands, a step motor for driving the hands uses an arrangement in consideration of magnetic influence from the power generating device. A special clock module has been created and commercialized. The use of harmful batteries today, in which the ecology of the earth is being screamed, has been reduced, and electronic watches with a power generating device that converts kinetic energy of the rotating weight into electric energy have been commercialized.

However, the cost of an electronic timepiece with a power generating device is still high, and is not a general timepiece. Further, as described above, an electronic timepiece with a power generating device becomes a dedicated timepiece module, so that it requires a lot of load in development and a long development period, which increases the cost.

[0004]

A number of timepiece modules driven by a battery and displaying at least hours and minutes have various external shapes and thicknesses and are produced in large numbers. Further, these timepiece modules are inexpensive, and many multi-hand timepieces using the timepiece module have been commercialized. For example, a normal clock module using hour, minute, and second hands at the center of the clock,
In a watch in which a chronograph wheel train for driving a chronograph second hand, minute chronograph hand and the like is arranged around the timepiece module, and in a proposal of Japanese Patent Application Laid-Open No. 63-253285, a normal time using a The timepiece module is shifted from the center of the timepiece, the hands of the timepiece module display the time at the center of the timepiece via the wheel train, and the function wheel train is provided using the space vacated by the shifted timepiece module. These ideas come from the ability to display the hour and minute hands by using a mass-produced inexpensive watch module, which can reduce the cost of the product and provide it at a low price.

[0005] In order to produce such an inexpensive electronic timepiece with a power generating device, a mechanism for displaying a normal time uses an inexpensive clock module mass-produced, and the clock module generates power using the power generating device. To supply electrical energy.

[0006] As a power generation method of an electronic timepiece with a power generation device today, electric energy is generated by increasing the rotation of a rotating weight and rotating a power generation motor. However, if the positional relationship between the time drive motor and the power generation motor in the timepiece module is not properly arranged, the magnetic flux generated in the power generation motor may adversely affect the time drive motor.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems. An inexpensive timepiece module is used, and a power generation motor used for a power generator is arranged around the timepiece module. It is an object of the present invention to provide an inexpensive electronic timepiece with a power generating device that is not affected by magnetism by arranging the power generating device so as to minimize the influence of the magnetic field.

[0008]

SUMMARY OF THE INVENTION To achieve the above object, the gist of the present invention is to provide an electronic timepiece having a timepiece module, a power generation device, and a power storage means, wherein the power generation device includes a rotating weight. A power generating magnet that rotates based on the power generating magnet, a power generating stator that guides a magnetic force generated by the rotation of the power generating magnet, a power generating coil that generates power based on the magnetic force from the power generating stator, A rectifying unit for rectifying electricity generated from the coil, the timepiece module includes a time display unit, and a time driving unit that drives the time display unit;
It has a conduction means for leading electricity from the power storage means to the time driving means.

Further, the timepiece module has at least hands for displaying hours and minutes, a step motor and a wheel train for driving the hands, and a drive coil constituting the stepper motor is biased to a part of the outer periphery of the timepiece module. It is arranged
An object of the present invention is to provide an optimal arrangement configuration so that the power generation device does not overlap with a timepiece module avoiding the arrangement position of the drive coil.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings. FIGS. 1, 3, and 4 are a front view, a module plan view, and a main cross-sectional view, respectively, of an electronic timepiece with a power generating device according to a first embodiment of the present invention.

In FIG. 1, reference numeral 1 denotes an electronic timepiece with a power generating device, 2 denotes a normal timepiece module for driving an hour hand 3, a minute hand 4 and a second hand 5; Of the watch module, the center of rotation of the hands of the timepiece module is deviated from the center of the completed wristwatch. Reference numeral 7 denotes a time driving coil in the timepiece module 2. Reference numeral 13 denotes a power generating coil, which is arranged on the winding stem 6 side of the timepiece module 2.
Reference numeral 17 denotes a decorative disk that rotates in accordance with the rotation of the rotary weight described later.

3 and 4, reference numeral 8 denotes a rotating weight for power generation. The rotation of the rotating weight 8 is accelerated by a weight pinion 9 and an intermediate wheel 10, and the power generating magnet 11 is rotated at a high speed to generate the power generating magnet. The magnetic force of 11 constitutes a power generation device that generates electricity in the power generation coil 13 through the power generation stator 12 and the power generation coil 13. The power generation device and the clock module 2 are on a second main plate 20 serving as a substrate of an electronic timepiece with a power generation device. Further, a gap is provided between the second main plate 20 and the dial 21, and the space protrudes from the second main plate 20 of the intermediate wheel 10, which transmits the rotation to the decorative disk 17 on which the rotation of the rotary weight 8 can be expressed on the dial 21. Decorative intermediate wheel 15 that fits with the set part and performs the same rotation as intermediate wheel 10
And a decorative wheel 16 to which a decorative disk 17 can be attached. Reference numeral 25 denotes a circuit board on which the IC 22, the capacitor 23, and the like are mounted. In this embodiment, the power generation circuit board and the clock driving circuit board are integrated. A storage battery 18 is provided at a place where a battery in the watch module 2 is disposed as a function of storing generated electric energy, and the watch module 2 is driven using the storage battery 18 as a power source.

As can be seen from FIG. 3, the time driving coil is biased to the opposite side of the winding stem 6 on the outer periphery of the timepiece module, so that the power generating coil 13 is arranged on the winding stem 6 side of the timepiece module 2. The power generating magnet 1 which can be positioned farther away from the driving coil 7 in the timepiece module 2 and is generated during power generation.
1 is less susceptible to magnetic effects. Further, in this case, it is desirable that the power generating coil 13 is arranged so as to avoid the winding stem 6.

FIGS. 2 and 5 show an electronic timepiece with a power generator according to a second embodiment of the present invention.

In FIG. 2, reference numeral 2a denotes a timepiece module shifted from the center of the timepiece as in the first embodiment.
The arrangement positions of the minute hand 4a and the second hand 5a are changed in the wheel train using existing technology so as to be at the center of the clock. 13a shows the position of the power generation coil.

In FIG. 5, 25a is a circuit board.
Unlike the circuit board 25 of the first embodiment, only the circuit board for power generation is provided in the timepiece module 2a, and the circuit board 26 is directly connected to the storage battery 24 in the timepiece module 2a. Since the rotating weight and the power generation stator of the power generation device are almost the same as those of the first embodiment, the description is omitted here.

As can be seen from FIG. 5, similarly to the first embodiment, the drive coil 7 and the power generation coil 13a in the timepiece module 2a are separated from each other in position, and the other party is less susceptible to the influence of magnetism generated from each other. .

In the second embodiment, the timepiece module 2a
The conventional clock module can be used by leaving the normal clock driving circuit board inside, and the power generation circuit board 25a for transmitting the electricity generated from the power generation coil 13a to the storage battery 24 changed from the battery is provided. The sharing of the clock module can be greatly improved.

FIG. 6 shows a third embodiment of the present invention. FIG.
Reference numeral 30 denotes a timepiece module in which a drive coil 32 is arranged in parallel with a winding stem 31;
3, a weight pinion 34, an intermediate wheel 35, a power generating magnet 36, a power generating stator 37, and a power generating coil 38. The respective mechanisms are the same as those of the first and second embodiments.

As can be seen from FIG. 6, even when the shape and position of the timepiece module 30 for driving hours, minutes and seconds are changed from those of the first and second embodiments, the power generating coil 38 is changed as shown in FIG. By arranging it at a position distant from the drive coil 32 in the timepiece module 30, the influence of the magnetic field generated from each is not exerted on each other.

[0021]

By using an inexpensive timepiece module as it is, or by using an inexpensive timepiece module as a basis, not only the development load can be reduced, but also the time drive motor and the power generation motor in the timepiece module can be reduced. This can be achieved by arranging the motors so as not to be influenced by each other's magnetism. Further, by displacing the timepiece module from the center of the electronic timepiece with the power generating device, the power generating device can be arranged in the room, so that the module outer diameter of the electronic timepiece with the power generating device does not increase. In addition, the room can be used for display places other than the time display using the room. In any case, the clock display unit of the electronic timepiece with the power generating device is greatly effective in shortening the development period and reducing the cost by using the existing clock module.

[Brief description of the drawings]

FIG. 1 is a timepiece front view of an electronic timepiece with a power generating device according to a first embodiment of the present invention.

FIG. 2 is a front view of a timepiece of an electronic timepiece with a power generation device according to a second embodiment of the present invention.

FIG. 3 is a plan view of the inside of the electronic timepiece with a power generating device of FIG. 1 of the present invention.

4 is a main sectional view of FIG. 3 of the present invention.

5 is a plan view of the inside of the electronic timepiece with a power generating device of FIG. 2 of the present invention.

FIG. 6 is a plan view of the inside of an electronic timepiece with a power generating device according to a third embodiment of the present invention.

[Description of Signs] 2, 2a, 30 Clock module 6, 31 Winding winding 7, 32 Drive coil 8, 33 Rotating weight 9, 34 Weight pin 10, 35 Intermediate wheel 11, 36 Power generating magnet 12, 37 Power generating stator 13 , 13a, 38 Power generation coil

Claims (3)

[Claims] 1. An electronic timepiece including a timepiece module, a power generation device, and a power storage means, wherein the power generation device includes a power generation magnet that rotates based on rotation of a rotating weight, and a rotation of the power generation magnet. The timepiece includes a power generating stator for guiding a magnetic force generated by the power generation, a power generating coil for generating power based on the magnetic force from the power generating stator, and rectifying means for rectifying electricity generated from the power generating coil. The power module includes a time display unit, a time drive unit that drives the time display unit, and a conduction unit that guides electricity from the power storage unit to the time drive unit. Electronic clock. 2. The timepiece module has at least a hand for displaying hours and minutes, a step motor for driving the hands and a wheel train, and a drive coil constituting the step motor is biased to a part of an outer periphery of the timepiece module. The electronic timepiece with a power generating device according to claim 1, wherein the power generating device is disposed so as not to overlap with the timepiece module avoiding the position where the drive coil is disposed. 3. In the external shape forming the timepiece, a timepiece module is arranged at a position shifted from the center of the timepiece, and a time position other than the time display is set at a gap position of a time display portion formed by shifting the timepiece module. The electronic timepiece with a power generating device according to claim 3, wherein a matter is displayed.