JPH03179291A - Electronic wristwatch equipped with dynamo - Google Patents

Abstract

PURPOSE:To achieve miniaturization and the reduction of thickness and to enhance the generation capacity of electricity by setting the center of rotation of a rotary wt. to a position separated from the center of a time-piece and setting the angle of rotation of the rotary wt. to 180 deg. or less to arrange a power supply and a generation coil out of the operation region of the rotary wt. CONSTITUTION:When a rotary wt. is shaken within a definite angular range accompanied by the movement of an arm, the rotation of the rotary wt. gear 34 fixed to the rotary wt. 30 is transmitted and accelerated through a train wheel to rotate a generation rotor 41 and the current of a generation coil 43 generated by the change of magnetic force brought about by the rotation of the rotor 41 is rectified or boosted by an electronic circuit 22 to charge a power supply 21. The quartz unit 23 of the electronic circuit 22 is operated by the energy stored in the power supply 21 to send a definite drive pulse to a hand moving coil 4 and a time is displayed by the train wheel and a hand and a data indicator 51 is rotated through a hour wheel 53 and a data indicator driving wheel 52 to perform calendar display.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to an electronic wristwatch with a generator that generates electricity by rotating a rotary weight through arm movements.

[Summary of the Invention 1 This invention provides an electronic wristwatch with a generator in which the center of rotation of the rotary weight is located away from the center of the watch body, the rotation angle of the rotary weight is set to 180 degrees or less, and the rotational weight is placed outside the operating range of the rotary weight. By arranging the power supply and power generation coil, we were able to create an electronic wristwatch that is small, thin, and has good power generation performance.

[Prior Art] As shown in FIGS. 6 and 8, a conventional electronic wristwatch with a generator includes a hand movement coil 4, a hand movement stator 5, a hand movement rotor 6, a fifth wheel 7, and a fourth wheel on the back cover side of the main plate 1. Assemble the wheel train such as the number wheel 8 and the wheel train bridge 18 that supports this wheel train, and place the power source 21. Electronic components such as an electronic circuit 22 and a crystal unit 23 are assembled with a power generation lock 41, a power generation stake 42, a power generation coil 43, and the like. A transmission bridge 38 is assembled on the gear train bridge 18, and a rotary weight 30 is rotatably assembled thereto via a pole bearing 33. 32 is configured to rotate between a generator coil 43, a power source 21, a crystal unit 23, a winding stem 2, a hand movement coil 4, etc., and the case back.

Also, as shown in Fig. 7, a date dial 51 is placed on the dial side of the main plate l.
In the Calenda 1 wristwatch, the center of rotation of the date dial 51 was located approximately at the center of the watch body, and the date dial 51 was located at a position that overlapped with the operation locus of the main plate 1 and the rotating weight 32 in a plane.

For example, JP-A-52-82480, JP-A-61-
Structures of conventional electronic wristwatches with generators are disclosed in JP-A-293143, JP-A-53-26168, JP-A-50-17866, and the like.

Furthermore, the structure of the conventional date wheel and rotary weight is disclosed in Japanese Utility Model Publication No. 62-44295, etc. [Problem to be Solved by the Invention 1] However, in the conventional electronic wristwatch with a generator, Since the center is at the center of the watch body, increasing the length from the center of gravity of the rotating weight to the center of rotation requires increasing the size of the watch. Due to the arrangement of the generator coil, winding stem, etc., the thickness of the watch had to be increased in order to increase the thickness of the rotating weight. For this reason, if we increase the first moment of motion of the rotating weight, which is the product of the weight of the rotating weight, which is related to the amount of charge when the watch is worn on the wrist, and the distance from the center of rotation to the center of gravity of the rotating weight, The problem was that the watch was large, thick, and heavy.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to obtain a compact, thin, and lightweight electronic wristwatch with a generator, which has high power generation performance when carried by making the first moment of motion of the rotary weight sufficiently large.

[Means for Solving the Problems 1] In order to solve the second problem, this invention provides the rotation center of the rotary weight at a position away from the center of the watch toward the outer periphery and near the winding stem. By not installing other watch components in a position that overlaps with the operating area in a plane, the total thickness of the rotating weight is approximately equal to the total thickness of the watch body, ensuring a sufficiently large primary moment of movement of the rotating weight, In addition, the configuration was such that the power source and power generation coil were placed outside the operating area of the rotary weight.

[Function] In the electronic wristwatch with a generator configured as described above, when the rotating weight swings within a certain angle range as the arm moves, the rotating weight gear fixed to the rotating weight 30 as shown in FIG. 34 is transmitted and accelerated through the wheel train to rotate the power generation rotor 41, and the electric current of the power generation coil 43 generated by the change in magnetic force caused by the rotation of the rotor 41 is transferred to the electronic circuit 2.
2, the power source 21 is charged as a rectifier or layer pressure.

W; The energy stored in f9.21 operates the electric-Fm circuit 22 and crystal unit 23, sends a driving pulse to the hand movement coil 4, and changes the time etc. by the train and hands. In addition, the date wheel 51 is rotated via the hour wheel 53 and date wheel 52 shown in FIG. 4 to display a calendar.

Here, if the electronic wristwatch with a generator according to the present invention is attached to the arm so that the side with the winding stem is directed toward the fingertips of the arm or vice versa, the human arm can be easily moved while walking or exercising. is swung back and forth about 30 to 60 degrees, so the rotating weight rotates at a corresponding angle, and when a person is sitting at a desk reading or writing, the human arm swings about 90 degrees with the elbow as the fulcrum. Since the rotary weight is often rotated by a corresponding angle, as shown in the present invention, the rotational angle of the rotary weight is 180 degrees or less, and sufficient power generation performance can be ensured.

Furthermore, in the present invention, the first moment of motion of the rotary weight is sufficiently large, so that the six-rotary weight moves and generates electricity in response to a small movement of the arm.

[Example] Embodiments of the present invention will be described below with reference to the drawings.

In FIGS. 1 and 5, the hand movement stator 5 is mounted on the main plate 1.
Also, the hand movement coil 4 is screwed and the hand movement rotor 6 is rotatably assembled in the rotor hole of the hand movement stake 5. Hand movement coil 4
A drive pulse is given to the drive pulse by the operation of a power supply 21, an electronic circuit 22, and a crystal unit 23, and the magnetic force generated by this causes the hand movement rotor 6 to rotate at a constant cycle. The train wheel and the hand movement rotor are rotatably supported by a train wheel bridge 18.

The rotation of the hand movement wheel is the fifth wheel 7, the fourth wheel 8, the third wheel 9,
The time is transmitted to the minute wheel 54, the minute wheel (not shown), and the hour wheel 53, and the time is displayed by the pointer 63.

The needle is set using a winding stem 2, a switching device 3, and a switching device 3 built into the main plate l.
This is carried out using a rolling train 14, a small iron train 15, etc.

A transmission bridge 38 is assembled on the gear train bridge 18, an inner ring 35 is fixed to the transmission bridge 38, and a rotary weight 30 is rotatably incorporated through a pole bearing 33.

The rotating weight 30 is composed of a rotating weight body 31 and a rotating weight 32.

Here, the rotation centers of the fourth wheel & pinion 8, the minute wheel 54, and the hour wheel 53, which are the wheel train on which the hands are attached, are located approximately at the center of the watch body, but the rotation center of the rotating weight is different from this, and the rotation center of the oscillating weight is different from this. It is located on the axis offset from the center of the watch body to the outer periphery.

The rotating weight 32 of the rotating weight 30 is made of a material with high specific gravity such as tungsten carbide, and there is no base plate 1 or other components in the operating area of the rotating weight 32, and the thickness of the rotating weight 30 is equal to that of the watch body. It can be made thicker until it is almost equal to the total thickness of .

The rotary weight 30 can swing within a range of about 70 degrees in FIG. 1 with the inner ring 35 as the center of rotation, and this rotatable angle is determined by the magic portions 1a and 1b of the base plate.

Since the bottom surface of the rotary weight 32 is near the dial 62, if a window is made in this part of the dial 62 or made transparent,
You can check the movement of the rotating weight while wearing the watch on your wrist, allowing you to see the operating status of the generator at a glance.

If the center of rotation of the rotary weight 30 is brought closer to the outer periphery of the main plate 1 on the winding stem axis, the first moment of motion of the rotary weight can be increased, so the required values for the operating angle of the rotary weight and the size of the watch body can be increased. The hoisting performance settings can be changed according to the

In this embodiment, the case where the position of the winding stem 2 and the center of the rotation locus of the rotary weight 30 are opposite to the center of the watch body is shown. This is because, in the case of the direction or vice versa, it is considered that the present embodiment best matches the movement of the arm and improves the power generation performance.

Therefore, in a watch where the winding stem is worn on the wrist at a certain angle with the direction of the arm, the rotation center of the oscillating weight is not located on the winding stem axis as in this example, but between the center of the watch body and the outer periphery. It will be placed in another position.

The rotation of the rotary weight gear 34, which is fixed to the rotary weight 30 and rotates at the same time, rotates the power generation rotor 41 via the first transmission gear 36 and the second transmission gear 37, and the magnet 41a of the power generation rotor 41 rotates.
The rotation of the power generating coil 43 via the power generating stator 42
An electrolyte is generated.

The generated current is charged to the power source 2 through a rectifier circuit and a booster circuit in the electronic circuit 22. As the power source 21, a rechargeable secondary battery or a large capacity capacitor is used.

FIG. 2 shows a diagram when the electronic watch of the present invention is worn on the wrist and the rotary weight 30 moves to the left. The rotation of the rotary weight 30 is regulated by the abutment portion 1a of the main plate, but at this time, Rotating weight body 3
1 does not overlap with the generating coil 43, so the generating coil 43
The thickness of the watch can be reduced to the end of the watch case back, and by making the coil volume sufficiently large, the power generation performance of the generator can be improved.

On the other hand, FIG. 3 shows a diagram when the electronic timepiece of the present invention is worn on the wrist and the rotary weight 30 moves to the right. Although the rotation of the rotary weight 30 is regulated by the stop portion 1b of the main plate, At this time, since the rotating weight body 31 does not overlap the power source 21, the thickness of the power source 21 can be reduced from the back cover side of the watch body to the cup.
By increasing the capacity of the battery or capacitor, the operating time of the watch can be extended.

In addition, in FIGS. 1 to 3, for convenience of explanation,
Descriptions of the gear train bridge 18, transmission bridge 38, power generation rotor bridge 44, circuit board, battery terminals, etc. are omitted.

FIG. 4 is a diagram of the electronic wristwatch of the present invention viewed from the dial side, and for the sake of explanation, the date dial holder, date jumper, date 4i correct mechanism, etc. are omitted from the diagram.

The rotation of the hour wheel 53 is transmitted to the date wheel 52 which rotates once a day, and the date dial 52 is integrally formed with the date wheel 52.
The date wheel 51 rotates by 1/31 revolutions per day due to a, and displays the date.

The rotation center of the date dial 51 is the center of the clock body, and the hour wheel 53
The date dial 51 is located at a position offset toward the outer periphery of the main plate near the winding stem at a position different from the center of rotation of the date wheel 51, and the date dial 51 is located at a position that does not overlap the operating area of the rotary weight 32 at all.

Therefore, there is no possibility that the six-turn weight 32 will hit the date dial 51 and deform the date dial 51 due to impact on the watch body.

[Effects of the Invention] As explained above, in this invention, the length from the center of rotation of the rotating weight to the position of the center of gravity of the rotating weight can be made large, and the thickness of the rotating weight is equal to the total thickness of the watch body. Since it can be taken equally,
Since the first moment of motion of the rotary weight is sufficiently large, it is possible to obtain an electronic wristwatch with a generator that is small and thin and has high power generation performance. However, in order to increase the first moment of motion of a rotating weight, the distance from the center of rotation to the center of gravity of the rotating weight is increased without increasing the weight of the rotating weight, which does not increase the weight of the watch and is expensive. This saves tungsten carbide, which is a popular material.

In addition, since the volume of the power generation coil can be increased within a watch body with a fixed volume, a large number of turns of thick coil wire can be wound, improving the power generation performance of the generator. Continuous operation time can be extended.

Furthermore, even in a clock using a date dial, since there is no date dial within the motion trajectory of the rotating weight, the clock can be made thinner.

[Brief explanation of drawings]

1 to 4 are plan views showing an embodiment of the electronic wristwatch of the present invention, FIG. 5 is a vertical sectional view thereof, FIGS. 6 and 7 are plan views of a conventional electronic wristwatch, and FIG. It is a conventional vertical cross-sectional view. 1 2 0 2 3 1 ・Main plate winding stem・Power source・Electronic circuit・Rotating weight・Rotating weight generator coil・Date wheel and above

Claims (2)

[Claims] (1) In an electronic wristwatch with a generator, which has a chargeable/dischargeable power source, a source oscillator, an electronic circuit, a step motor, a gear train, a pointer, a switching device, etc., a oscillating weight, a transmission gear train, and a generator, the rotation of the oscillating weight The center is located between the center of the watch body and the outer periphery of the watch body, near the winding stem position, and the rotational angle of the rotary weight is 180 degrees or less. An electronic wristwatch with a generator in which the power source and power generation coil are placed outside the operating area of the rotating weight without overlapping each other. (2) The electronic wristwatch with a generator according to claim 1, wherein the rotation center is set near the winding stem position between the center of the watch body and the outer periphery of the watch body, and a date dial is incorporated outside the operating area of the rotating weight.