JP2004045429A - Timepiece - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an optimum structure for downsizing and thinning a watch having an oscillating weight, especially an automatic winding power generation watch which generates power by means of the movement of the oscillating weight. <P>SOLUTION: In order to effectively gain biased weight of the oscillating weight, the outer circumference of the oscillating weight is formed thick, and the central part thereof is formed thin. Almost all of the built-in components constituting a movement are placed below the thin part, and a coil or part of a switch is placed below the thick part. <P>COPYRIGHT: (C)2004,JPO

Description

The present invention relates to a component arrangement of a timepiece having a rotating weight.

2. Description of the Related Art As an electronic timepiece, as described in Japanese Patent Application Laid-Open No. 62-49885, there is an automatic winding timepiece that generates power by a small generator by the movement of a rotating weight, charges it to a secondary power source, and drives the watch with the energy. Has been invented.
In the case of this timepiece, the input energy increases and the power generation amount increases as the weight of the rotating weight increases, so the problem is how to secure the weight of the rotating weight efficiently.
The single weight is represented by the product of the weight of the oscillating weight and the distance from the center of rotation to the center of gravity of the oscillating weight. Therefore, if the weight is the same, it can be said that it is effective to make the weight of the rotary weight as far away from the center of rotation as possible.

For this reason, in the conventional example, the internal parts such as the train wheel and the coil that constitute the movement are configured on the center side, no parts are arranged outside thereof, the thickness is made thinner than the internal parts, and the rotating weight is attached to that part. The thick part is arranged, and the rotating weight thin part is arranged above the built-in part.

い え る This is an efficient arrangement, but it is necessary to consolidate the internal components of the movement in a range of diameter smaller than the thick part of the rotating weight.

JP-A-62-49785

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

In order to make the self-winding watch smaller and thinner, it is important to secure a single weight of the oscillating weight, even if the diameter of the movement is small. For that purpose, the tightening range of the internal components of the movement should be as small as possible. There is a need.

Some general quartz watches have a diameter of about 10 mm, and although there is ample possibility, since they are self-winding watches, they are subject to the following restrictions.

In order to carry around and carry, and to have a margin of energy storage, reduce the motor power consumption as much as possible and increase the generated power as much as possible to secure more power generation than consumption. There is a need.

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

In addition, regarding the power generation coil, it is necessary to generate a high induced voltage, effectively extract the voltage as a current, and charge the secondary power supply. Since the induced voltage 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. To effectively extract it as a current, it is necessary to lower the coil impedance, that is, the coil resistance. This also tends to increase the volume of the power generation coil, similarly to the timepiece coil.

Therefore, if the range of the built-in parts of the movement is reduced as it is for miniaturization and thinning, the power generation performance will be remarkably reduced, which is unsuitable for actual use.

The wristwatch of the present invention has at least a power supply, a circuit, a coil wound in a bar shape, a clock wheel train located near the center of the movement, a rotating weight having a rotatable single weight shape,
The oscillating weight has a thick portion on the outer peripheral side, a thin portion formed on the rotation center side, such that the power supply, the circuit, the coil, the train wheel portion overlap when rotated, and the train wheel portion has a thinner portion. It is characterized in that a part of the coil is disposed in the rotation locus range of the thick portion in the rotation locus range.

In addition, at least a rotating weight having a rotatable one-weight shape, a rotating wheel that rotates coaxially with the rotating weight, a transmission wheel train that meshes with the rotating wheel and transmits rotation, and has a permanent magnet and meshes with the transmission wheel train A rotating power generating rotor is provided, wherein the rotating weight is supported by a first ball bearing, and at least one of the transmission wheel train and the power generating rotor is supported by a second ball bearing.

In addition, at least the main plate, an external operating member that can be operated in the axial direction, a brace that engages with the external operating member and regulates the position, a clock wheel train located near the center of the movement, and a rotatable single-weight shape. A rotating weight, the weight and the rotating weight are arranged on the same surface side of the base plate, the rotating weight has a thick portion on the outer peripheral side, a thin portion on the rotation center side, and An external operating member, a weighing device, and a timepiece wheel train portion overlap with each other, and the wheel train portion is disposed in a rotation trajectory range of the rotating weight thin portion, and a part of the weight is positioned in a rotation trajectory range of the rotating weight thick portion. It is characterized by having been done.

According to the above invention, even if the range of the internal components of the movement is reduced as it is for miniaturization and thinning, the power generation performance is not remarkably reduced, and the product is suitable for actual use.

FIG. 1 is an assembly plan view of an embodiment of the present invention, and FIGS.

In the drawing, reference numeral 1 denotes a main plate serving as a base of the movement, 2 denotes a watch coil, 3 denotes a stator, and 4 denotes a rotor. The rotation of the rotor 4 is transmitted to the fourth wheel 7, the third wheel 8, the second wheel 9, the minute wheel 10, and the hour wheel 11 via the fifth wheel 5. The minute wheel # 10 is engaged with the small iron wheel 12. These wheel train groups are supported by a wheel train receiver 13.

The single-weight rotary weight 20 is fixed to a ball bearing 22 fixed to a rotary weight receiver 21 with a rotary weight screw 23. Below the oscillating weight 20 is a oscillating weight wheel 24, which is similarly fixed. The rotary wheel 24 meshes with a pinion of a power generation rotor transmission wheel 25 having a pinion 25a and a gear portion 25b, and the gear portion 25b meshes with a pinion 26a of a power generation rotor 26 to transmit rotation of the rotary weight. The speed of the train from the oscillating wheel 24 to the power generation rotor 26 is increased by about 30 to 200 times, and the rotation of the oscillating weight 20 causes the power generation rotor 26 to rotate at high speed. The speed increase ratio can be set freely according to the performance of the generator and the specifications of the timepiece. Since the permanent magnet 27 is fixed to the power generation rotor 26, a magnetic flux having a different direction flows through the power generation stator 28 and flows to the power generation coil 29 every time it rotates, and an induced voltage is generated in the coil.
The end of the power generation coil 29 is connected to the pattern of the coil lead board 39, presses against the circuit board 37 via the circuit holding plate 38 with the set screw 44, and is electrically connected to the circuit. The power generating coil 29 and the power generating stator 28 are pressed against each other by set screws 46 and 47 to form a magnetic path. However, the connection between the coil lead board 39 and the circuit board 37 is disconnected in a plane, and the thickness is reduced.

Next, as the circuit relation, 31 indicates a crystal unit, 32 indicates a MOSIC chip, 33 indicates an auxiliary capacitor, 34 indicates a diode for rectification, and 35 and 36 indicate boosting 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 is fixed by screws. Reference numeral 40 denotes a capacitor of the secondary power supply, and each electrode is electrically connected to the pattern of the circuit board 37 by a plus terminal (not shown) and a minus terminal. The circuit of this embodiment employs a method disclosed in Japanese Patent Application Laid-Open No. 60-203887 in which the voltage of the secondary power supply 40 is boosted by the boost capacitor 36 and stored in the auxiliary capacitor 33 to drive the clock.

Reference numeral 14 denotes an external operation member. A damper 15 for controlling this operation is engaged with a groove of the external operation member 14, and its position is regulated by a latch 16. The knuckle 16 is engaged with a groove of a pinwheel 17 guided by the external operation member 14. In addition, it has a train wheel setting lever that resets the circuit train and the circuit in conjunction with the movement of the external operation member 14, but is not shown. The upward direction of the shim 15 and the latch 16 are determined by a shim retainer 18 fixed with a set screw 45. The operation of these switchings is well known and will not be described.

In the above description, the rotary weight 20 has the thick portion 20a on the outer peripheral portion, and takes a trajectory that rotates outside most of the internal components constituting the movement. At least a part of the power generation coil 29 overlaps with the thick portion, and in the present invention, the coil winding portion is planarly overlapped. The winding of the power generation coil 29 overlaps with the gear 25 b of the power generation rotor transmission wheel 25. Further, it overlaps with the MOSIC chip 32 and the circuit board 37 constituting the circuit.

In FIG. 7, the upper tenon of the power generation rotor transmission wheel 25 constituting the power generation wheel train is guided by a bearing ball bearing 50 fixed to the rotary weight receiver 21. In the bearing ball bearing 50, the outer ring 50a is fixed to the rotating weight receiver 21, and the plurality of balls 50b are directly engaged with the upper tenon of the power generation rotor transmission wheel 25. The upward positioning of the power generation rotor transmission wheel 25 is performed by a presser wheel 50C fixed to the outer ring 50a. The outer ring 50a is made of a non-magnetic material. This is to reduce the magnetic effect on the generator, but if the effect can be ignored, a magnetic material such as steel may be used. In the case where the influence is large, not only the outer ring but also other parts may be changed to a non-magnetic material. Also, a bearing 51 is used on the lower tenon side of the power generation rotor 26. In this case as well, it is necessary to use a magnetic material and a non-magnetic material as described above, but it is desirable that at least the outer ring be made of a non-magnetic material because it may be near a magnet. Bearing The bearing 51 includes an outer ring 51a, a ball 51b, and a presser wheel 51C. The outer ring 51a determines the agitation of the power generation rotor 26.

Bearings Both the bearings 50 and 51 do not use a retainer and are aimed at miniaturization and cost reduction. However, there is no problem even if the retainer is used. In the bearing 50, the vicinity of the hole of the outer ring 51a protrudes toward the ball 50b, and the clearance between the bearing 50 and the presser ring 50c is smaller than the outer diameter of the ball 50b. Therefore, even before the power generation rotor transmission wheel 25 is assembled, the ball 50b does not come off. Further, since the ball is displaced to some extent before the power generation rotor transmission wheel 25 is assembled, a gap between the ball and the outer ring 50a is generated, and dirt is easily removed by washing. Also in the bearing 51, the holes formed in the outer ring 51a and the presser ring 51c are smaller than the outer diameter of the ball 51b. Since both bearings mainly have a radial effect, the vertical play may be large.

ベ ア リ ン グ In this example, the bearings are used above the power generation rotor transmission wheel 25 and below the power generation rotor 26 for the following reason. In the generator rotor transmission wheel 25, a kana portion 25 a protrudes above the rotary weight receiver 21 in order to mesh with the rotary weight wheel 24. Accordingly, in order to adopt a general configuration in which the bearing and the base plate guide the bearing from above and below, the diameter of the bearing portion must be made larger than the outer diameter, and the bearing load increases. Further, since the power generation rotor 26 and the magnet 27 are attracted to the power generation stator 28, and the force is applied to the lower tenon, the load increases. The use of bearings in these parts has the effect of reducing bearing loads and increasing power generation efficiency. The efficiency can be further improved by adopting the structure below the transmission wheel of the generator rotor or above the generator rotor.

The above invention has the following effects.

For the amount of power generation, the induced voltage generated in the coil is extracted 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. 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. It can be said that.

In the case of the conventional example, since the power generation coil 29 is disposed inside the rotation locus of the rotary weight outer peripheral thick portion 20a, as the rotary weight diameter decreases, the coil length also decreases, the number of turns decreases, and the induced voltage also decreases. . In order to prevent this, winding a coil wire with a small wire diameter to secure the number of turns increases the coil resistance and reduces the amount of power generation. However, in the present invention, since the coil winding portion and the thick portion of the rotary weight are overlapped, the thickness of the coil winding portion is reduced, but the length can be increased.

比較 Comparing a thin and long coil with a thick and short coil, with the same number of turns, the former can shorten the coil wire length and lower the coil resistance. Therefore, it is possible to make an advantageous setting for power generation. In the conventional structure, since it is impossible to overlap the power generation coil 29 and the gear 29b of the power generation rotor transmission wheel 25, the outer diameter of the gear cannot be increased due to the restriction of the power generation coil. Therefore, the speed increase ratio from the rotary wheel 24 to the power generation rotor 26 becomes smaller, or the wheel train is increased by one step in order to secure the speed increase ratio. However, in the present invention, since the gear 25b of the power generation rotor transmission wheel 25 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 having a small absolute area.

案 In the present invention, the power generation coil is arranged below the thick portion of the rotating weight, but the clock coil can be arranged similarly. However, it is generally said that the longer the core length around which the coil is wound, the weaker the anti-magnetic property becomes. Therefore, it is necessary to increase the cross section of the magnetic core or to examine other anti-magnetic means.

Because the bearing ball bearings 50 and 51 are used in the power train, the power generation efficiency is also increased. The bearing ball bearing determines the height of the power generation rotor transmission wheel 25 and the power generation rotor 26 at a portion fixed to the rotary weight receiver 21 or the main plate 1. In general, setting the height at the fixed part increases the load and is not implemented.However, in the case of a watch, the load applied in the height direction is only the own weight of the wheel train, and the horizontal direction applied during power generation Force 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 at the time of impact, so that the height direction can be ignored. This eliminates the need to provide the bearing with an inner ring, simplifies the structure, reduces the cost and reduces the size.

The switching is arranged outside the internal parts of the movement so that the weight overlaps the thick part on the outer periphery of the rotary weight. The setting is restricted by the height position of the external operation member, and the rotary weight thick portion escapes the external operation member in the height direction, so that the escape in the height direction is relatively easy. As a result, the space required for switching can be arranged on the outer peripheral side of the movement, so that a relatively thick electric element such as the auxiliary capacitor 33 or the diode 34 can be arranged in that portion, which is effective in miniaturization.

し て も Even if the range of the internal components of the movement is reduced as it is for miniaturization and thinning, the power generation performance is not significantly reduced and the power generation clock is suitable for actual use.

The top view of the Example of this invention. FIG. 2 is a sectional view of the embodiment of the present invention. FIG. 2 is a sectional view of the embodiment of the present invention. FIG. 2 is a sectional view of the embodiment of the present invention. FIG. 2 is a sectional view of the embodiment of the present invention. FIG. 2 is a sectional view of the embodiment of the present invention. FIG. 2 is a sectional view of the embodiment of the present invention.

Explanation of reference numerals

1 Ground plate, 2 watch coils, 3 stators, 4 rotors, 5th wheel, 7th wheel, 8 third wheel, 9 second wheel, 10th wheel, 11 cylinder wheel, 12 small iron wheel, 13 wheels Row bearings, 14 External operating members, 15 Bolts, 16 Bolts, 17 Wheels, 18 Bolt holders, 20 Rotating weights, 21 Rotating weight receivers, 22 Ball bearings, 23 Rotating weight screws, 24 Rotating weight wheels, 25 Generator rotor transmission Car, 26 generator rotor, 27 magnet, 28 generator stator, 29 generator coil, 31 crystal unit, 32 MOSIC chip, 33 auxiliary capacitor, 34 diode, 35, 36 boost capacitor, 37 circuit board, 38 circuit holding plate, 39 coil lead Substrate, 40 Secondary power supply, 41 Negative terminal, 44, 45, 46, 47 Set screw, 50 Bearing ball bearing, 51 Bearing ball bearing

Claims (3)

At least, a power supply, a circuit, a coil wound in a rod shape, a watch wheel train located near the center of the movement, a wristwatch having a rotating weight having a rotatable single weight shape,
The oscillating weight has a thick portion on the outer peripheral side, a thin portion formed on the rotation center side, such that the power supply, the circuit, the coil, the train wheel portion overlap when rotated, and the train wheel portion has a thinner portion. A wristwatch with a rotary weight, wherein a part of the coil is arranged in a rotation locus range of the thick part. At least a rotating weight having a rotatable one-weight shape, a rotating wheel that rotates coaxially with the rotating weight, a transmission wheel train that meshes with the rotating wheel and transmits rotation, and has a permanent magnet and rotates with the transmission wheel train. In a wristwatch having a generator rotor,
An electronic timepiece with a oscillating weight, wherein the oscillating weight is supported by a first ball bearing, and at least one of the transmission wheel train and the power generation rotor is supported by a second ball bearing. At least a main plate, an external operating member that can be operated in the axial direction, a brace that engages and regulates the position of the external operating member, a clock wheel train located near the center of the movement, and a rotatable weight having a rotatable single-weight shape. In an electronic timepiece having
The weight and the rotating weight are arranged on the same surface side of the main plate,
The oscillating weight has a thick portion on the outer peripheral side, a thin portion formed on the rotation center side, and overlaps with the external operation member, the weighing device, the watch wheel train portion when rotated,
A wristwatch with a oscillating weight, wherein the train wheel portion is arranged in the range of the rotation trajectory of the thin portion of the oscillating weight, and a part of the balance is positioned in the range of the trajectory of rotation of the thick portion of the oscillating weight.

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