JP3275363B2 - clock - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an arrangement of parts for a timepiece.

[0002]

2. Description of the Related Art Electronic timepieces are disclosed in Japanese Patent Application Laid-Open No. 62-49785.
As described above, a self-winding power generation clock has been invented in which a small generator generates power by the movement of a rotary weight, charges the secondary power supply, and drives the clock with the energy.

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

[0004] The single weight is expressed as 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 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.

[0005] Therefore, in the conventional example, the internal parts such as the train wheel and the coil constituting the movement are formed on the center side, and no parts are arranged outside thereof, and the thickness is made thinner than the internal parts. The thick portion of the rotating weight is disposed on the upper portion, and the thin portion of the rotating weight is disposed on the upper side of the built-in component portion.

Although this is an efficient arrangement,
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.

[0007]

However, the following problems arise when attempting to reduce the size and thickness of a timepiece.

In order to reduce the size and thickness of the self-winding power generation watch, it is important to secure a single weight of the rotating weight even if the diameter of the movement is small. It must be as small as possible.

There is a general quartz timepiece having a diameter of about 10 mm, which is sufficiently possible. However, since it is a self-winding timepiece, it is subject to the following restrictions.

[0010] In order to keep the portable device running, and to provide a margin for energy storage, the power consumption of the motor is reduced as much as possible, and the generated power is increased as much as possible. Many need to be secured.

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

Further, it is necessary to generate a high induced voltage with respect to the power generation coil, effectively extract the voltage as a current, and charge the secondary power supply. The induced voltage is
Because 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. 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 internal components of the movement is reduced as it is for the purpose of miniaturization and thinning, the power generation performance is remarkably reduced, which is unsuitable for practical use.

[0014]

A timepiece according to the present invention includes a rotating weight, a power generation wheel train for transmitting the rotation of the rotary weight, a power generation coil of a generator driven by the power generation wheel train, and a power generation stator. It has a magnetic circuit, a crystal unit, an IC chip, a timepiece coil of a timepiece motor, and a timepiece train wheel portion, and the rotating weight has a thin portion on the rotation center side and a thick portion on the outer circumference side. The power train, the crystal unit, the IC chip, the clock coil, and the watch wheel train are arranged in a rotation locus range of the thin portion, and at least a part of the power generating coil is a rotation locus of the thin portion. The quartz unit is disposed between the power generation coil and an inner peripheral locus of the thick portion, and the IC chip is disposed to overlap the magnetic circuit in a plane. . further,
The timepiece according to the present invention is characterized in that a part of the power generation coil is arranged in a rotation locus range of the thick part. Further, the timepiece of the present invention is characterized in that the timepiece train wheel portion is arranged so as to overlap with the power generation wheel train in plan.
In the timepiece of the present invention, the IC and the crystal unit are mounted on a circuit board, the circuit board is pressed by a circuit pressing plate having a spring portion, and the crystal unit is directly pressed by the spring portion. It is characterized by the following.

[0015]

[0016]

[0017]

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

In the drawing, reference numeral 1 denotes a main plate serving as a base of the movement, 2 denotes a timepiece 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. In addition, the minute wheel 10 meshes with a small iron wheel 12. These wheel train groups are supported by a wheel train receiver 13.

The single weight oscillating weight 20 is fixed to a ball bearing 22 fixed to the oscillating weight receiver 21 by an oscillating weight screw 23. Below the oscillating weight 20 is a oscillating weight wheel 24, which is similarly fixed. The oscillating wheel 24 is a kana part 2
The gear portion 25b meshes with the pinion of the power generation rotor transmission wheel 25 having the gear portion 25b, and the gear portion 25b meshes with the pinion 26a of the power generation rotor 26 to transmit the rotation of the rotary weight. The train wheel from the oscillating wheel 24 to the generator rotor 26 is 30 to 2
The speed is increased to about 00 times, and the rotation of the rotary weight 20 causes the power generation rotor 26 to rotate at high speed. The speed increase ratio can be freely set depending on the performance of the generator and the specifications of the timepiece. The permanent magnet 2 is attached to the power generation rotor 26.
Since the fixing member 7 is fixed, a magnetic flux having a different direction flows through the power generation stator 28 to the power generation coil 29 every time the motor 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, is pressed against the circuit board 37 via the circuit holding plate 38 by the set screw 44, and is electrically connected to the circuit. The power generation coil 29 and the power generation 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 a circuit relation, 31 is a crystal unit, 32 is a MOSIC chip, 33 is an auxiliary capacitor,
Reference numeral 34 denotes a diode for rectification, and reference numerals 35 and 36 denote 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 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 according to the present embodiment is configured such that the voltage of the secondary power
, And drives the clock stored in the auxiliary capacitor 33.

Reference numeral 14 denotes an external operation member, and 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. Kannuki 16
Is engaged with the groove of the pinwheel 17 guided by the external operation member 14. In addition, the train wheel has a train wheel setting lever that resets the train and resets the circuit in conjunction with the movement of the external operation member 14, but is not shown. Rest 1
The upward direction of the 5 and the latch 16 is determined by the pressing 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 oscillating weight 20 has a thick portion 20a on the outer periphery, and takes a trajectory that rotates outside most of the built-in components of the movement. At least a part of the power generation coil 29 with respect to the thick portion,
In the present invention, the coil winding portions are planarly overlapped. A thin portion is formed inside the thick portion 20a, and the rotation center of the rotating weight is also included. The winding of the power generation coil 29 overlaps 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. The bearing ball bearing 50 has an outer ring 50a that is mounted on 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. Generator rotor train 25
The positioning in the upward direction 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 neglected, 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. A bearing 51 is also used on the lower tenon side of the power generation rotor 26. As for the material, it is necessary to use a magnetic material and a non-magnetic material as described above, but it is desirable to use a non-magnetic material at least for the outer ring 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 bearings 50 and 51 do not use a retainer and are aimed at miniaturization and cost reduction, but use of a retainer does not pose a problem. The bearing 50 is
The vicinity of the hole of the outer ring 51a protrudes toward the ball 50b, and the clearance between the outer ring 51a and the presser wheel 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 balls are displaced to some extent before the power generation rotor transmission wheel 25 is assembled, there is a gap with the outer ring 50a, and dirt is easily removed by washing. Also in the bearing 51, since the holes formed in the outer ring 51a and the presser ring 51c are smaller than the outer diameter of the ball 51b, the ball 51 does not come off and has the same effect. Since both bearings mainly have a radial effect, the vertical play may be large.

In the present embodiment, the upper part of the generator rotor transmission wheel 25 and
The bearing is used under the generator rotor 26 for the following reason. The power generation rotor transmission wheel 25 has a kana portion 25a protruding 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 larger than the outer diameter, and the bearing load increases. Further, the power generation rotor 26 and the magnet 27 are
The load is increased because the force is applied to the lower tenon side. The use of bearings in these portions 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.

Further, the embodiment of the present invention will be described in detail.

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 generating coil 29 is disposed inside the rotation locus of the rotary weight outer peripheral thick portion 20a,
As the diameter of the oscillating weight decreases, the coil length also decreases, 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 increases, and the amount of power generation decreases. However, in the power generation coil of the present invention, while securing a large number of turns of the coil, a device for increasing the wire diameter and shortening the entire length of the coil to reduce the impedance of the coil is devised. That is, the coil is formed to be long in the length direction and thin in the radial direction. By increasing the length of the entire coil in the length direction, a large number of turns can be secured. In this case, in the conventional example, the number of windings is increased in the radial direction to secure the number of windings. For this reason, the coil diameter increases, and the coil length increases accordingly. Since the number of turns is increased in the vertical direction, the number of turns can be secured without reducing the wire diameter, and the radial dimension of the coil can be reduced.As a result, the overall length of the coil is shortened, and the impedance is reduced. Become smaller. For this reason, a part of the power generation coil could be overlapped with the rotation locus range of the thick portion of the rotating weight.

Here, a long coil having a thin overall coil,
Comparing thick and short coils, 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. On the other hand, in the conventional structure, since the power generation coil 29 and the gear 29b of the power generation rotor transmission wheel 25 cannot be overlapped, the outer diameter of the gear cannot be increased due to the restriction of the power generation coil. For this reason, the speed increase ratio from the rotary wheel 24 to the power generation rotor 26 is reduced, or the wheel train is increased by one step to secure the speed increase ratio. However, in the present invention, the gear 25b of the power generation rotor transmission wheel 25 and the power generation coil 2
Since 9 is superimposed, the outer diameter of the gear can be increased, and a speed increasing ratio sufficient for power generation can be secured. Similarly, MOS
Since the IC chip 32 can be overlapped with the coil, it is advantageous for a planar layout of a female movement having a small absolute area.

Further, in the present invention, the power generating coil is arranged below the thick portion of the rotary weight, but it is also possible to arrange the timepiece coil in the same manner. 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. Here, in a watch motor,
Since the operation is based on the electromagnetic action, it is extremely important to prevent the influence of the magnetic field from the outside of the timepiece motor as much as possible. For this reason, it is desired to shorten the entire length of the timepiece coil for the timepiece motor, and the number of turns in the radial direction increases because the number of turns must be secured in the radial direction. In this case, the coil diameter is small, the total length is long, and the impedance is large. From the above, when the power generation coil and the watch coil are compared, in particular, as shown in the plan view of FIG. 1 and the cross-sectional views of FIGS.
It is thinner and longer than a watch coil. Therefore, the power generation coil has a large number of turns and has a small impedance and can secure high power generation efficiency. On the other hand, a timepiece coil has a large number of turns and a large impedance and can reduce current consumption and minimize the influence of an external magnetic field. It can be reduced. For this reason, the power generating coil may be partially disposed in the range of the rotation locus of the thick portion of the rotating weight, and it does not adversely affect the diameter of the rotating weight or the thickness of the thick portion. Absent.

Also, a bearing ball bearing 5 is provided in the power train.
Since 0 and 51 are used, the power generation efficiency is also increased. Bearing The ball bearing is a power generation rotor transmission wheel 25.
The height of the power generation rotor 26 is determined by the 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. For switching,
It is arranged outside of the internal organs of the movement so that the weight overlaps with the thick part on the outer periphery of the rotating weight. The rest is restricted by the height position of the external operation member,
Since the rotating weight thick portion escapes the external operation member in the height direction, 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 for miniaturization.

[0032]

According to the present invention, the following effects can be obtained.
Among the watch components such as the power train, crystal unit, watch coil, and watch train, thick and large parts are placed in the rotation locus range of the thin part of the oscillating weight. Can be placed. In addition, at least a part of the power generation coil is disposed in a rotation locus range of the thin portion, and the crystal unit is disposed between the power generation coil and the inner circumference locus of the thick portion, so that the power generation coil is limited. Power generation performance can be improved in the clock space. That is, reducing the coil winding outer diameter of the power generation coil while increasing the length of the power generation coil and increasing the number of turns leads to improving power generation performance in a limited timepiece space. Then, in order to arrange the power generating coil having a longer length and an increased number of windings within the timepiece with good space efficiency, at least a part of the power generating coil is disposed in the rotation locus range of the thin portion of the rotating weight, and Inevitably, a dead space is generated in the plane direction between the thick portion and the inner peripheral locus. Therefore, arranging the quartz unit, which can be arranged relatively freely and is indispensable to the configuration as a watch component, in the dead space leads to effective use of the limited space of the watch, and the size of the watch can be reduced. Further, since the magnetic circuit and the IC chip are superposed on each other in a plane, the space including the clock circuit can be effectively used, and the size of the clock can be further reduced. Since the IC chip is disposed so as to overlap the magnetic circuit in a plan view, the wiring distance between the IC chip and the power generation coil can be reduced, and the impedance of the wiring portion of the electronic circuit is reduced. This suppresses the loss of the power obtained. further,
The IC chip is disposed so as to overlap the magnetic circuit in a plan view, and the crystal unit is disposed between the power generation coil and the inner peripheral locus of the rotating weight thick portion.
It becomes possible to arrange the chip in close proximity. Therefore I
Since the wiring distance between the C chip and the crystal unit can be shortened, and the impedance of the wiring portion of the electronic circuit decreases, the power consumption required for oscillation by the crystal resonator is suppressed. In addition, since the crystal unit and the IC chip can be arranged close to each other, the wiring distance between the two can be shortened, and the maximum value of the electric capacitance and the variation in electric capacitance generated in the wiring portion between both terminals of the crystal unit can be reduced. Can be reduced, and the displacement of the time standard signal during oscillation can be suppressed. As described above, according to the present invention, it is possible to supply a timepiece that has improved power generation performance while reducing power consumption of a circuit unit and increasing the accuracy of time, thereby achieving a thinner and smaller size. it can.

[Brief description of the 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]

 DESCRIPTION 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 wheel 11 Hour wheel 12 Small iron wheel 13 Wheel train receiver 14 External operation member 15 Bolt 17 Suspension wheel 18 Weight holder 20 Rotating weight 21 Rotating weight receiver 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 Diodes 35, 36 Boost capacitor 37 Circuit board 38 Circuit holding plate 39 Coil lead board 40 Secondary power supply 41 Negative terminal 44, 45, 46, 47 Set screw 50 Bearing ball bearing 51 Bearing ball bearing

Continuation of front page (56) References JP-A-3-191892 (JP, A) JP-A-62-69191 (JP, A) JP-A-61-94525 (JP, A) JP-A-3-40727 (JP) JP-A-3-179291 (JP, A) JP-A-62-44295 (JP, U) JP-A-3-19991 (JP, U) WO 89/6833 (WO, A1) (58) Survey Field (Int.Cl. ⁷ , DB name) G04C 10/00 G04C 3/14

Claims (5)

(57) [Claims] 1. A magnetic circuit having a oscillating weight, a power generation wheel train for transmitting rotation of the oscillating weight, a power generation coil of a generator driven by the power generation wheel train, and a power generation stator, a crystal unit, and an IC chip. A timepiece coil of a timepiece motor, and a timepiece wheel train portion, wherein the rotating weight has a thin portion formed on a rotation center side and a thick portion formed on an outer peripheral side; An IC chip, a clock coil, and a wheel train section are arranged in a rotation locus range of the thin portion; at least a part of the power generating coil is arranged in a rotation locus range of the thin portion; A timepiece arranged between a power generating coil and an inner peripheral locus of the thick portion, wherein the IC chip is arranged to overlap the magnetic circuit in a plane. 2. The power generation coil according to claim 1,
A timepiece having a smaller diameter and a longer length than the timepiece coil. 3. The timepiece according to claim 1, wherein a part of the power generation coil is arranged in a rotation locus range of the thick part. 4. The timepiece according to claim 1, wherein the timepiece wheel train is arranged so as to overlap the power generation wheel train in a plane. 5. The circuit according to claim 1, wherein the IC and the crystal unit are mounted on a circuit board, and the circuit board is pressed by a circuit pressing plate having a spring portion. A timepiece which is directly pressed by a part.