JPH09230066A - Timepiece provided with rotary weight - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve power generating efficiency and attain miniaturization and decrease of cost, in a timepiece provided with rotary weight as a power generating means. SOLUTION: The upper tenon of a power generating rotor transmission wheel 25 constituting a generating wheel line is guided with a shaft receiving ball bearing fixedly secured with a rotary weight receiver 21. In the shaft receiving ball bearing, the outer ring 50a is fixed to the rotary weight 21, a plurality of balls 50b are directly engaged with the upper tenon of the power generating rotor transmission wheel 25. Positioning in the upper direction of the power generating rotor transmission wheel 25 is performed by a presser ring 50c fixed to the outer ring 50a.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a component arrangement of a rotary weight wristwatch.

[0002]

2. Description of the Related Art An electronic timepiece is disclosed in JP-A-62-49785.
As described above, an automatic self-winding timepiece has been invented in which a small power generator generates power by the movement of a rotary weight, the secondary power source is charged with the power, and the energy is used to drive a timepiece.

In the case of this timepiece, the larger the weight of the rotating weight is, the larger the input energy and the amount of power generation are. Therefore, how to efficiently secure the weight of the weight is a problem.

The weight of one side is represented by the product of the weight of the rotary weight and the distance from the center of rotation to the center of gravity of the rotary weight.
Therefore, if the weights are the same, it can be said that it is effective to configure the weight of the rotary weight as far from the center of rotation as possible.

Therefore, in the conventional example, built-in parts such as a train wheel and a coil that constitute the movement are formed on the center side, and no parts are arranged outside thereof, and the thickness is made smaller than that of the built-in part. The thick part of the rotary weight is arranged on the upper part of the internal part, and the thin part of the rotary weight is arranged on the upper side of the built-in component part.

It can be said that this is an efficient arrangement,
It is necessary to integrate the built-in parts of the movement into a range of diameter smaller than the thick part of the rotary weight.

[0007]

However, when attempting to realize a small and thin watch, the following problems arise.

In order to reduce the size and thickness of the self-winding watch, it is important to secure the weight of the rotary weight on one side even if the diameter of the movement is small. It is necessary to make it as small as possible.

There is a general quartz timepiece having a diameter of about 10 mm, and there is a sufficient possibility, but since it is an automatic winding timepiece, it is subject to the following restrictions.

[0010] In order to keep the portable device and keep it moving, and to allow a sufficient amount of energy to be stored, the motor power consumption is reduced as much as possible and the generated power is increased as much as possible. It is necessary to secure many.

Therefore, as an effective means for the motor, there is a method of increasing the coil resistance while ensuring the magnetomotive force of the coil, but this tends to increase the coil volume.

Further, with respect to the generator coil, it is necessary to generate a high induced voltage and effectively take it out as a current to charge the secondary power source. The induced voltage is
Since it is proportional to the number of turns of the magnetic flux and the amount of change in the magnetic flux,
It is advantageous to increase the number of turns of the coil. In order to extract it effectively as a current, it is necessary to lower the coil impedance, that is, the coil resistance. This is also in the direction of increasing the volume of the power generation coil as in the case of the timepiece coil.

Therefore, if the range of parts with a built-in movement is reduced as it is for the purpose of downsizing and thinning, the power generation performance is remarkably deteriorated, which is not suitable for actual use.

[0014]

A timepiece provided with a rotary weight according to the present invention has a power generation rotor that meshes with a transmission train wheel that transmits the rotation of the rotary weight, and the rotary weight has a first ball bearing. And bearing at least one of the transmission train wheel or the power generation rotor by the second ball bearing.

In this case, the second ball bearing is composed of a ball that is in contact with the transmission train wheel or the power generation rotor, an outer ring that covers the side surface and the upper part of the ball, and a retaining ring that covers the lower part of the ball. It is desirable that the ball be finely movable at least in the vertical direction between the outer ring and the presser wheel, and the transmission train wheel or the power generation rotor with which the ball contacts can also be finely moved in the vertical direction.

[0016]

1 is a plan view of an assembly of an embodiment of the present invention, and FIGS. 2 to 7 are sectional views of the same.

In the figure, 1 is a base plate which forms the base of the movement, 2 is a timepiece coil, 3 is a stator, and 4 is a rotor. The rotation of the rotor 4 is transmitted to the fourth wheel 7, the third wheel 8, the second wheel 9, the day wheel 10 and the hour wheel 11 via the fifth wheel 5. In addition, the rear wheel 10 of the day meshes with the iron wheel 12. The train wheel group is pivotally supported by a train wheel receiver 13.

The oscillating weight 20, which is a single weight, is fixed to a ball bearing 22 fixed to a oscillating weight receiver 21 by an oscillating weight screw 23. Below the rotary weight 20, there is a rotary weight wheel 24, which is similarly fixed. The rotary spindle 24 has a pinion 2
5a and the gear portion 25b mesh with the pinion portion of the power generation rotor transmission wheel 25, and the gear portion 25b meshes with the pinion portion 26a of the power generation rotor 26 to transmit the rotation of the rotary weight. The train wheel from the rotary weight wheel 24 to the power generation rotor 26 is 30 to 2
The rotation speed of the rotary weight 20 causes the power generation rotor 26 to rotate at a high speed. The speed increasing ratio can be freely set according to the performance of the generator and the specifications of the timepiece. The power generation rotor 26 includes a permanent magnet 2
Since 7 is fixed, magnetic fluxes in different directions each flow through the power generation stator 28 to the power generation coil 29, and an induced voltage is generated in the coil. The terminal of the power generation coil 29 is connected to the pattern of the coil lead board 39, and is pressed into contact with the circuit board 37 via the circuit pressing plate 38 with the set screw 44 to be electrically connected to the circuit. The power generating coil 29 and the power generating stator 28 are pressed against each other by setscrews 46 and 47 to form a magnetic path, but the coil lead substrate 39 and the circuit substrate 37 are flatly disconnected and thinned.

Next, regarding the circuit relation, 31 is a crystal unit, 32 is a MOSIC chip, 33 is an auxiliary capacitor,
Reference numeral 34 is a diode for rectification, and 35 and 36 are boost capacitors. These elements are mounted on a flexible circuit board 37. The circuit board 37 is pressed from above by a circuit pressing plate 38 having a spring portion and fixed by screws. 40 is a capacitor for the secondary power source, and each electrode has a positive terminal (not shown) and a negative terminal.
It is electrically connected to the pattern of the circuit board 37. The circuit of this example employs the system of Japanese Patent Laid-Open No. 60-203887, in which the voltage of the secondary power source 40 is boosted by the boosting capacitor 36 and is stored in the auxiliary capacitor 33 to drive the timepiece.

Reference numeral 14 denotes an external operation member, and a lever 15 for controlling this operation is engaged with a groove of the external operation member 14 and its position is regulated by a hollow 16. Kannuki 16
Engages with the groove of the clutch wheel 17 guided by the external operating member 14. Further, although it has a train wheel setting lever that trains the train wheel and resets the circuit in conjunction with the movement of the external operation member 14, it is not shown. Rest 1
The 5 and the bolt 16 are determined in the upward direction by the thumb presser 18 fixed by the set screw 45. The switching operation is well known and will not be described.

In the above description, the rotary weight 20 has the thick-walled portion 20a on the outer peripheral portion, and takes a locus that rotates on the outside of most of the built-in components constituting the movement. At least a part of the power generating coil 29, which is the coil winding portion in the present invention, overlaps the thick portion in plan view. The winding portion of the generator coil 29 overlaps with the gear 25b of the generator rotor transmission wheel 25. Also, the MOSIC chip 3 that constitutes the circuit
2 and the circuit board 37.

In FIG. 7, the upper tenon of the power generation rotor transmission wheel 25 constituting the power generation train wheel is guided by a bearing ball bearing 50 fixed to the rotary weight receiver 21. In the bearing ball bearing 50, the outer ring 50 a has a rotary weight receiver 21.
The plurality of balls 50b are directly engaged with the upper tenon of the power generation rotor transmission wheel 25. Generator rotor transmission vehicle 25
The positioning in the upward direction is performed by a retaining ring 50C fixed to the outer ring 50a. The outer ring 50a is made of a non-magnetic material. This is to reduce the magnetic influence on the generator, but if the influence can be ignored, a magnetic material such as steel may be used. Further, when the influence is great, it is possible to change not only the outer ring but also other portions to non-magnetic materials. A bearing bearing 51 is also used on the lower tenon side of the power generation rotor 26. As for the material, it is necessary to properly use the magnetic material and the non-magnetic material as described above, but it is desirable that at least the outer ring is made of the non-magnetic material because it is near the magnet. Bearing The bearing 51 is composed of an outer ring 51a, balls 51b, and a retaining ring 51C, and the outer ring 51a determines the advancing of the power generation rotor 26.

Bearings The bearings 50 and 51 do not use a retainer for the purpose of downsizing and cost reduction, but there is no problem even if a retainer is used. The bearing 50 is
The vicinity of the hole of the outer ring 51a projects toward the ball 50b, and the clearance with the retaining ring 50c is smaller than the outer diameter of the ball 50b. Therefore, the balls 50b will not come off even before the power generation rotor transmission wheel 25 is assembled.
Further, since the balls are displaced to some extent before the power generation rotor transmission wheel 25 is assembled, there is a gap between the balls and the outer ring 50a, and the dirt is easily removed by cleaning. Bearing The bearing 51 also has the same effect because the hole formed in the outer ring 51a and the retaining ring 51c is smaller than the outer diameter of the ball 51b, and the ball does not come off. Since both of the bearings mainly have a radial effect, the vertical play may be large.

In this example, on the generator rotor transmission wheel 25,
A bearing is used below the power generation rotor 26 for the following reason. The power generation rotor transmission wheel 25 has a pinion portion 25 a protruding above the rotary weight receiver 21 in order to mesh with the rotary weight wheel 24. Therefore, in order to adopt a general structure in which the support and the base plate are guided from above and below, the diameter of the bearing portion is made larger than the outer diameter of the pinion, and the bearing load increases. Further, the generator rotor 26 and the magnet 27 are combined with the generator stator 28.
The load is increased because the force is applied to the lower mortise side. The use of bearings in these portions has the effect of reducing bearing load and increasing power generation efficiency. It should be noted that if it is used under the power generation rotor transmission wheel or above the power generation rotor, it will be more efficient.

[0025]

The present invention has the following effects.

The amount of power generation is obtained by extracting the induced voltage generated in the coil as a current. Since the induced voltage is proportional to the number of turns of the coil wire and the amount of change in the magnetic flux, the higher the number of turns of the coil, the higher the generated voltage, which is advantageous. Further, the amount of the induced voltage that can be taken out as a current is inversely proportional to the impedance of the coil, proportional to the induced voltage, and the impedance of the coil increases as the coil resistance increases, as is well known. Therefore, the smaller the coil resistance, the better. Can be said.

In the case of the conventional example, since the generator coil 29 is arranged inside the rotation locus of the rotary spindle outer peripheral thick portion 20a,
As the diameter of the rotary spindle becomes smaller, the coil length becomes shorter, the number of turns decreases, and the induced voltage also decreases. To prevent this, if you try to secure the number of turns by winding a coil wire with a small wire diameter,
The coil resistance will increase, and the amount of power generation will decrease. However, in the present invention, since the coil winding portion and the thick portion of the rotary weight are overlapped with each other, the thickness of the coil winding portion is thin, but the length can be long.

Comparing a thin and long coil with a thick and short coil, the former can shorten the coil wire length and lower the coil resistance with the same number of turns. Therefore, it is possible to make an advantageous setting for power generation. In the conventional structure, it is impossible to overlap the generator coil 29 and the gear 29b of the generator rotor transmission wheel 25.
The outer diameter of the gear cannot be increased. Therefore, the speed increasing ratio from the rotary weight wheel 24 to the power generation rotor 26 becomes small, or the number of wheel trains is increased by one step to secure the speed increasing ratio. However, in this plan, the gear 2 of the power generation rotor transmission wheel 25 is used.
Since 5b and the power generation coil 29 are overlapped, the outer diameter of the gear can be increased, and a speed increasing ratio sufficient for power generation can be secured. Similarly, since the MOSIC chip 32 can be overlapped with the coil, it is advantageous for a planar layout of a female-movement movement having a small absolute area.

In the present invention, the generator coil is arranged under the thick portion of the rotary weight, but the timepiece coil may be arranged in the same manner. However, it is generally said that the longer the length of the magnetic core around which the coil is wound, the weaker it becomes against magnetic resistance. Therefore, it is necessary to increase the cross section of the magnetic core or study another magnetic resistance means.

Further, a bearing ball bearing 5 is provided in the power generation train wheel.
Since 0 and 51 are used, the power generation efficiency is also increased. Bearing Ball bearings are used for power generation rotor transmission wheels 25
The height of the power generation rotor 26 is determined by the rotary weight receiver 21 or the portion fixed to the main plate 1. In general, determining the height at the fixed part increases the load and is not implemented, but in the case of a watch, the load applied in the height direction is only the weight of the train wheel, and the lateral direction applied during power generation. Is overwhelmingly strong, and the power generation rotor is levitated by the magnetic force drawn by the power generation stator and does not hit except during a shock, so the height direction can be ignored. As a result, it is not necessary to provide an inner ring on the bearing, the structure is simple, and the cost can be reduced and the size can be reduced.

Regarding the switching, it is arranged outside the parts with built-in movement so that the oshirin overlaps with the thick part on the outer circumference of the rotary weight. The shidori is restricted by the height position of the external operation member, and the rotary weight thick-walled portion escapes the external operation member in the height direction, so that escape in the height direction is relatively easy. As a result, the space required for switching is
Since it can be arranged on the outer peripheral side of the movement, relatively thick electric elements such as the auxiliary capacitor 33 and the diode 34 can be arranged in that portion, which is effective for miniaturization.

[Brief description of drawings]

FIG. 1 is a plan view of an embodiment of the present invention.

FIG. 2 is a sectional view of an embodiment of the present invention.

FIG. 3 is a sectional view of an embodiment of the present invention.

FIG. 4 is a sectional view of an embodiment of the present invention.

FIG. 5 is a sectional view of an embodiment of the present invention.

FIG. 6 is a sectional view of an embodiment of the present invention.

FIG. 7 is a sectional view of an embodiment of the present invention.

[Explanation of symbols]

 1 Main plate 2 Clock coil 3 Stator 4 Rotor 5 Fifth wheel 7 Fourth wheel 8 Third wheel 9 Second wheel 10 Day back wheel 11 Cylinder wheel 12 Small iron wheel 13 Wheel train bridge 14 External operation member 15 Oshidori 16 Kanuki 17 Revolving wheel 18 Oshidori presser 20 Rotating weight 21 Rotating weight receiving 22 Ball bearing 23 Rotating weight screw 24 Rotating weight wheel 25 Generator rotor transmission wheel 26 Generator rotor 27 Magnet 28 Generator stator 29 Generator coil 31 Crystal unit 32 MOSIC chip 33 Auxiliary capacitor 34 Diode 35, 36 Step-up capacitor 37 Circuit board 38 Circuit holding plate 39 Coil lead board 40 Secondary power source 41 Negative terminal 44, 45, 46, 47 Set screw 50 Bearing ball bearing 51 Bearing ball bearing

Claims (2)

[Claims] 1. A timepiece including a rotary weight having a power generation rotor that meshes with a transmission train wheel for transmitting the rotation of a rotary weight, wherein the rotary weight is supported by a first ball bearing, and the transmission train wheel or An electronic timepiece with a rotating weight, characterized in that at least one location of a power generation rotor is borne by a second ball bearing. 2. The second ball bearing includes a ball that abuts against the transmission train wheel or the power generation rotor, an outer ring that covers a side surface portion and an upper portion of the ball, and a retaining ring that covers a lower portion of the ball. It is configured such that the ball can be finely moved at least in the vertical direction between the outer ring and the presser ring, and the transmission train wheel or the power generation rotor with which the ball abuts can also be finely moved in the vertical direction. A timepiece provided with the rotary weight according to claim 1.