JP3358582B2 - Electronic 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 electronic timepiece having a so-called self-winding generator, and more particularly to a structural technique for reducing the thickness of an electronic timepiece.

[0002]

2. Description of the Related Art In a so-called electronic timepiece using a quartz oscillator or the like as a time reference, a small power generator 20 and a secondary power supply 30 constitute a power supply 10 as shown in FIG. As the step motor 40
Is to be driven. A timepiece train wheel 50 is mechanically connected to the motor rotor 42 of the step motor 40. For example, the second hand 161 attached to the fourth wheel 52 intermittently rotates by 6 ° every second. I do.

On the other hand, the small generator 20 includes a power generation rotor 21 that is rotated by the transmitted rotary drive power, a power generation stator 22 sandwiching the power generation rotor 21, a power generation stator 22, the power generation rotor 21, and a magnetic field. A power generating coil 23 wound around a magnetic core 24 forming a circuit;
To the power generation rotor 21, a power generation wheel train 60 that speeds up and transmits the rotational operation of the rotary shaft 25 is mechanically connected.

There is a strong demand for a pointer-type electronic timepiece, even if it is a type equipped with the above-mentioned small generator, to be thin. However, in order to meet such demands, it is not possible to reduce the thickness by simply reducing the size and thickness of each component such as the rotary weight 25 constituting the small generator. For example, when the oscillating weight 25 is made thinner, the weight imbalance of the oscillating weight 25 in the angular direction becomes smaller, and it becomes difficult to obtain high-speed rotation of the oscillating weight 25. Further, since necessary components are mounted on the circuit board 31 constituting the circuit section, the circuit section cannot be further reduced in size and thickness. Nevertheless, if an attempt is made to reduce the space in which it is arranged, the electronic components that make up the circuit unit will interfere with the gears that make up the power train wheel 60 and the watch wheel train 50. .

Here, the rotation center axis of the power generation rotor 21 and the rotation center axis of the power generation wheel train 60 are often supported by bearings having a small and simple structure made of cobblestone. However, in a bearing structure using a pit stone, when the rotation center shaft rotates, the lubricating oil applied thereto tends to scatter around. If the splashed tide lubricating oil adheres to the timepiece wheel train 50, the stoppage of the gears and the stagnant hand movement abnormality occur due to the viscosity of the lubricating oil. For this reason, in the conventional pointer type electronic timepiece,
Since the components cannot be brought close to each other, there is a problem that the thickness cannot be reduced.

Further, as shown in FIG. 11, in a conventional pointer-type timepiece, a side pressure of a gear used for a power generation wheel train or the like is indicated by a power generation rotor transmission wheel 62A (see FIG. 1). Gears that are subject to rotation
20A may be supported by ball bearings 28A. The ball bearing 28A is adjacent to the plurality of balls 281A arranged around the rotation center axis 620A of the power generation rotor transmission wheel 82A, a ring-shaped frame piece 282A holding the balls 281A, and the frame piece 282A. And a receiving piece 283A for preventing the ball 281A from falling off at the position, and the ball 281A comes into contact with the rotation center axis 620A so that the rotation center axis 620A
Is restricted to the side. In addition, the rotation center shaft 6
20A is formed with a step 626A.
The position of the rotation center shaft 620A in the axial direction is defined by the contact of 6A with the receiving piece 283A.

However, the bearing structure as shown in FIG. 11 has a problem that the frictional resistance between the step 626A and the receiving body 283A is large when the rotation center shaft 620A rotates. With such a large frictional resistance, an unnecessary force is required to rotate the rotation center shaft 620A, and the step 626A or the receiving piece 2 is not required.
83A wear is severe. Therefore, a new bearing structure that can solve such a problem is demanded. However, a bearing structure that requires a large space even if the above problem can be solved cannot be adopted because it hinders the thinning of the pointer type electronic timepiece.

[0008]

SUMMARY OF THE INVENTION In view of the above problems, an object of the present invention is to improve the structure and arrangement of each component disposed inside a timepiece in an electronic timepiece with a built-in generator. It is an object of the present invention to provide a configuration capable of reducing the thickness of an electronic timepiece.

[0009]

[0010]

[0011]

[0012]

[0013]

[0014]

[0015]

[0016]

[0017]

[0018]

[0019]

[0020]

[0021]

[0022]

In the present invention, an external force is applied.
Generator with power train for transmission to power generator rotor
And a secondary that stores electrical energy generated by the generator
A power supply and a drive circuit supplied with power from the secondary power supply are configured.
And a switch driven by the drive circuit.
Step motor and time display member from the step motor
And a wheel train for transmitting rotational driving force to the base
In an electronic timepiece, external force is transmitted through the power train
A rotating weight for transmitting power to the power generation rotor;Weight
IsRotating weight receiverThe rotation center portion supported by the
A thin portion formed around the core, and an outer peripheral side of the thin portion
And a thick portion formed on the base.
In the rotation region of the thin portion, the timepiece train wheel and the
An electric train wheel is arranged, and the circuit portion is turned around the thick portion.
The part located in the turning area is recessed or penetrated in the base.
It is arranged in the circuit part arrangement hole configured as a through hole, and
The circuit is composed of a metal base plate and a circuit made of insulating material.
And a circuit provided on the circuit receiver.
The electronic parts constituting the drive circuit are arranged in the part arrangement holes.
It is characterized by having been done.

In the present invention, the thin portion and the thick portion mean a portion where the thickness of the oscillating weight is relatively thin and a thick portion, respectively, and a meaning of the thinnest portion and the thickest portion of the oscillating weight. It is not limited.

In the electronic timepiece according to the present invention, the rotating weight has a thin portion and a thick portion to increase the amount of imbalance, and in addition, each member of the rotating weight has its own rotating area. Are arranged in an optimal state. That is, a portion of the circuit portion located in the rotation region of the thick portion is arranged in a circuit portion arrangement hole configured as a concave portion or a through hole in the base. Therefore, according to the present invention, a narrow gap corresponding to the rotation region of the thick portion can be effectively utilized, and the electronic timepiece can be made thin.

[0025]

According to the present invention, the movement of the timepiece train wheel is controlled by being mechanically connected to a rest which is operated by an external operation to an external operation member in a rotation region of the thin portion on the base. It is common that a setting lever that stops is arranged. In this case, the portion of the circuit portion disposed in the circuit portion placement hole in the rotation region of the front thick portion is mechanically connected to the stamen, so that the drive circuit There is a case where a reset lever that operates as a switch for temporarily stopping the drive of the stepping motor and for returning the same to the stepping motor is disposed in the circuit portion placement hole.

In the present invention, the base may include a metal base plate and a circuit seat made of a green material. In this case, it is preferable that the circuit portion arrangement hole is formed in the circuit receiving seat.

In the present invention, a screwed portion of a rotary weight receiver that supports the rotary weight and the power generation wheel train via a bearing is disposed in a rotation area of the thin portion on the base. May be. In this case, it is preferable that the entire rotary weight receiver is disposed in a rotation area of the thin portion on the base.

Also in the present invention, the timepiece train wheel includes:
Generally, an hour wheel connected to an hour hand is included. In this case, the inner peripheral portion of the end surface of the hour wheel on the side where the hour hand is located is shaved, and the outer peripheral portion of the end surface is shaved on the opposite end surface. Is preferred. In this way, the necessary minimum gap is secured between the hour wheel and the dial by recessing the end surface of the hour wheel between the hour wheel and the back surface of the dial and interposing a disc spring there. can do. Therefore, the electronic timepiece can be made thinner. Also, even if burrs occur during drilling of the dial,
The burrs do not reach the hour wheel because there is a minimum gap. Therefore, even if the electronic timepiece is thinned, the rotation of the hour wheel is not hindered.

Also in the present invention, between the timepiece wheel train and the power generation wheel train, a part of a wheel train receiver supporting the timepiece wheel train is used to prevent lubricating oil from scattering. Preferably, the wall is configured. With such a configuration, the wall composed of a part of the wheel train receiver is present near the power generation rotor transmission wheel of the generator, so that the lubricating oil does not scatter around. Therefore, the space between the components can be narrowed, so that the component placement space can be secured accordingly. Therefore, the electronic timepiece can be made thinner. Further, since the rotation of the gear is not hindered by the scattered lubricating oil, the reliability is improved.

Also in the present invention, at the connection portion between the power generating stator and the power generating core of the power generator, the base plate, the power generating core, and the power generating stator are laminated in this order, and The upper and lower surfaces of the coupling portion with the power generation core are located between the upper and lower surfaces of the power generation stator located around the power generation rotor, and the upper surface of the connection portion is lower than the magnet upper surface of the power generation rotor. It is preferable that a cross-sectional structure located on the side is configured. As described above, when the connecting end of the power generating stator is processed so as to ride on one magnetic core at the connecting portion between the power generating stator and the magnetic core, the connecting portion can be made thinner, so that the electronic timepiece can be made thinner. it can.

[0032]

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

(Overall Configuration) FIG. 1 is a schematic configuration diagram showing the overall configuration of an electronic timepiece. Since the basic structure of the electronic timepiece of the present example is the same as that of a conventional electronic timepiece, parts having common functions are described with the same reference numerals.

In FIG. 1, the pointer-type electronic timepiece 1 of this embodiment is shown.
Is an analog quartz wristwatch of a pointer display type, in which a step motor 40 is driven based on a signal transmitted from a quartz oscillator 32 mounted on a circuit board 31. The step motor 40 includes a motor rotor 42 having permanent magnets magnetized in two poles, a motor stator 43 having a cylindrical rotor arrangement hole 430 in which the motor rotor 42 is arranged, and a coil 41. And a coil block composed of a magnetic core 44 wound with the coil. The fifth wheel 51, the fourth wheel 52, the third wheel 53, the second wheel 54, the minute wheel 55, and the hour wheel 5 are connected to the motor opening 42 via the kana portion.
6 is mechanically connected, and a second hand 161 is fixed to the end of the shaft of the fourth wheel & pinion 52. A minute hand 162 is fixed to the tip of the cylindrical shaft of the center wheel & pinion 54. At the end of the cylindrical shaft of the hour wheel 56, an hour hand 16
3 is fixed. Here, the reduction ratio from the motor rotor 42 to the fourth wheel 52 is set to 1/30. The second hand 161 indicates that the motor rotor 42
It is configured to intermittently rotate by 6 ° by intermittently rotating by 80 °.

The power supply 10 for driving the step motor 40 includes a small generator 20 and a secondary power supply 30.
(Capacitor). The small generator 20 receives the kinetic energy from the rotating weight 25, and rotates by receiving kinetic energy from the rotating weight 25 so as to generate power when the arm on which the pointer-type electronic timepiece 1 is fitted is moved so as to generate power. A power generating rotor 21, a power generating stator 22 sandwiching the power generating rotor 21, and a power generating coil 23 wound around a magnetic core 24 forming a magnetic circuit with the power generating stator 22 and the power generating rotor 21. ing. The oscillating weight 25 and the power generation port 21 are mechanically connected by a power generation wheel train 60 that transmits the rotational operation of the oscillating weight 25 at an increased speed. The power train 60 includes a rotating wheel 61 integrally formed with the rotating weight 25, and a power generating rotor transmission wheel 62 having a pinion that meshes with the gear. The power generation rotor 21 includes a permanent magnet formed with magnetic poles N and S. When the rotation of the rotary weight 25 is transmitted, the magnetic poles N and S rotate. Therefore, since an induced electromotive force can be obtained from the power generation coil 23, the secondary power supply 30 can be charged.

The rotating weight 25 will be described in detail later.
Rotating weight fixing screw 250 is attached to the rotating central portion. Here, the rotating weight 25 is a screw 25 for fixing the rotating weight.
A peripheral portion of 0 (rotation center portion) is a thin portion 251 as a rotary weight, and an outer peripheral portion thereof is a thick portion 252 as a rotary weight connected to the rotary weight. Therefore, even when the weight 25 is made thin, the weight imbalance of the weight 25 in the angular direction is large.

(Plane Arrangement Structure of Wheel Train) The arrangement structure of each part having a power generation function and a hand movement function will be described with reference to FIGS. FIG. 2 is an explanatory diagram showing a planar arrangement structure of a small generator and the like in the pointer-type electronic personal gauge of the present embodiment,
FIG. 3 shows a step motor in the pointer-type electronic timepiece,
FIG. 2 is an explanatory diagram showing a planar arrangement structure of a timepiece train wheel, a circuit board, and the like.

FIG. 2 is a plan view showing a state in which main parts are mounted on a horizontal base plate of the base of the pointer type electronic timepiece of this embodiment.

In FIG. 2, the central portion of the main plate 200 is a portion to be the center of rotation of the rotary weight 25 and each pointer. The clock face of the clock is arranged on the back side of the main plate 200, and in the drawing, each time corresponding to this angle is attached to each angular direction of the main plate 200.

In FIG. 2, the rotation area of the rotary weight 25 is an area indicated by a two-dot chain line Ll slightly inside the outer peripheral edge of the main plate 200. Inside the two-dot chain line Ll, there is a rotating weight 25.
The rotation range of the thin portion 251 and the thick portion 25
A two-dot chain line L2 separating the rotation range of FIG.
In the present embodiment, the thin portion 25
The small generator 20 is arranged so as to straddle the rotating machine 1 and the rotating area of the thick portion 252. The pinion portion 210 of the power generating rotor 21, meshing generating rotor transmission wheel 62, the pinion portion 620 of the power generating rotor transmission wheel 62,
A oscillating wheel 61 fixed to the oscillating weight 25 is engaged. Here, not only the rotating wheel 61 but also the power generation rotor transmission
The power generation wheel train 60 having a large height, such as the pulley 22 and the power generation rotor 21, are all arranged inside the rotation region of the thin portion 251.

Each of the rotary weight 25 and the power generation wheel train 60 is supported by a flat rotary weight receiver 26, and the rotary weight receiver 26 is also entirely disposed inside the rotation area of the thin portion 251. The rotary weight receiver 26 has three screws 2
Fixed to the main plate 200 by 67, 268, 269,
Each of the screwed portions is located inside the rotation region of the thin portion 251.

As described above, since the inside of the rotation area of the thin portion 251 is effectively used, the pointer-type electronic timepiece 1 can be made thin. Moreover, if the rotary weight 25 is removed, the rotary weight receiver 26 can be removed as it is, and the disassembly is good.

In the rotation region of the thin portion 251, FIG.
As shown in the figure, the fifth wheel 51, the fourth wheel 52, the third wheel 53,
A timepiece train wheel 50 having a large height such as a second wheel 54, a minute wheel 55 and an hour wheel 56 is also arranged.

Accordingly, in order to increase the amount of weight imbalance in the angular direction of the oscillating weight 25,
Even if the thick portion 252 as a rotating weight is provided on the outer peripheral portion of the vehicle, there is no problem in arranging each wheel train. In addition, the thin portion 251 is increased by the amount by which the unbalance amount of the rotary weight 25 is increased.
Can be extended to secure a wider space for arranging other components, which is advantageous for reducing the thickness of the pointer-type electronic timepiece 1.

(Planar Arrangement Structure of Circuit Board) Instead, a relatively thin member is arranged in the rotation area of the thick portion 252 of the oscillating weight 25. First, the circuit board 31 made of a flexible board on which the diode 33 and the like constituting the drive circuit are mounted has a relatively small thickness. It is arranged using a gap between the thick portion 252 of the weight 25 and the main plate 200.

However, as shown in FIGS. 3 and 4, the crystal oscillator 32 and the IC driving capacitor 35 require relatively large accommodation dimensions when they are arranged. The circuit board 31
(In the rotation region of the thick portion 251 of the rotary weight 25).

On the other hand, a surface mount type component such as a diode 33 is mounted on a circuit board 31, and this circuit board 31
It is arranged so as to face 00. Therefore, the diode 33 and the like are provided with the through holes 2 formed in the main plate 200.
06. Here, a circuit receiving seat 311 made of an insulating material is attached to the inner peripheral surface of the through hole 206 of the base plate 200, and the diode 33 is provided in the through hole 205 (circuit portion arrangement hole) of the circuit receiving seat 311. a throat <br/> is located.

As described above, the base plate 20 constituting the base 2
Of 0 and circuit receiving seat 311, since that is disposed etc. diode 33 in the through hole 205 of the circuit receiving seat 311, against the rotational region of the smaller thickness portion 252 of gap size, the driver circuit The majority of electronic components on the circuit board 31 can be arranged. Moreover, since these electronic components are surrounded by the insulating circuit receiving seat 311 formed on the inner peripheral surface of the through hole 206 of the base plate 200, problems such as short circuits do not occur.

(Arrangement Structure of Time Adjusting Switching Member) FIG. 5 is an explanatory view showing a planar arrangement relationship of a time adjusting mechanism in the pointer-type electronic timepiece of this embodiment.

As shown in FIG. 5, the pointer type electronic timepiece 1 also has a mechanism for adjusting the second hand and the like by operating the crown 7 (external operation member) and the like from the outside. In this mechanism, first, a shim 71 is engaged with a shaft portion connected to the crown 7.
Is regulated by the latch retainer 76.
The latch 72 is engaged with a groove of a ratchet wheel 73 connected to the shaft of the crown 7. For this reason, when the crown 7 is pulled out one step, the setting 71 rotates in the direction of the arrow A. Here, the dowels formed on the posterior 71 include:
Because the cam groove of the setting lever 74 is engaged, when the crown 7 is pulled out, the setting lever 74 rotates in the direction of arrow B, engages with the fifth wheel & pinion 51, and stops the movement of the second hand 161.
In this state, when the crown 7 is turned, the minute wheel 55 and the like can be rotated via the small iron wheel 79. By adopting this mechanism, the time can be adjusted while the second hand 161 is stopped, so that the second time can also be adjusted.

Further, a reset lever 75 is also connected to the setting lever 71 via a cam mechanism. When the crown 7 is pulled out one step, the reset lever 75 rotates in the direction of arrow C. Since the contact portion 315 projecting from the circuit board 31 is located on the side of the rotation direction, the switch is activated in conjunction with the operation of pulling out the crown 7 one step. In this state, the output of the drive signal from the drive circuit (not shown) formed on the circuit board 31 to the step motor 40 is stopped, so that the rotation of the motor rotor 42 also stops.

Here, as can be seen from FIG. 6, the reset lever 75 and the setting lever 74 are constituted by thin plate-like members, but the regulating lever 74 acts directly on the fifth wheel & pinion 51. Therefore, it is necessary to dispose it at the center of the main plate 200. Therefore, the setting lever 74 is connected to the rotating weight 2.
5 in the rotation region of the thin portion 251 (the thin portion 2 of the rotating weight 25).
51 (between the rotation position 51 and the main plate 200).

On the other hand, the reset lever 75 may be formed of a thin metal plate and may be located at a position where it can make contact with a part of the circuit board 31. (Thick portion 252 of rotating weight 25)
(Between the rotation position and the main plate 200).

The reset lever 75 is also made of a metal plate and constitutes a part of the circuit section. The reset lever 75 is disposed near the ground plate 200 like the diode 33 on the circuit board 31 described with reference to FIG.
Therefore, in the present embodiment, the reset lever 75 is
It is located in the concave portion 207 (circuit portion disposing hole) of the circuit receiving seat 311 made of an insulating material disposed in the through hole 208.

As described above, in the present embodiment, the reset lever 75 is arranged in the circuit portion arrangement hole formed by the concave portion 207 of the circuit receiving seat 311 among the base plate 200 and the circuit receiving seat 311 constituting the base 2. The reset lever 75 can be arranged in the rotation region of the thick portion 252 having a small gap size. In addition, since the reset lever 75 is surrounded by the insulating circuit receiving seat 311, a short circuit does not occur.

The switching members such as the setting lever 71 and the latch 72 are also provided in the thick portion 252 of the rotary weight 25.
(Between the rotation position of the inner thick part 252 of the rotary weight 25 and the main plate 200) in the rotation area of the rotary weight 25.

In this way, the pointer-type electronic timepiece 1 of this embodiment is
In the embodiment, the thickness is reduced by fully utilizing not only the rotation area of the thin portion 251 of the rotating weight 25 but also the narrow gap between the thick portion 252 of the rotating weight 25 and the base plate 200.

As can be seen from FIG. 7A, the circuit board 31 is positioned with the projection 312 of the circuit receiving seat 311 fitted in the hole 310 formed therein.
And it is in a state of being pressed and fixed by the circuit pressing plate 310. Also, as can be seen from FIG. 7B, at the end of the circuit board 31, the portion to be the contact point 315 is in a state of protruding to the side, and when the crown 7 is pulled out, the tip of the reset lever 75 is moved. The contact portion 755 bent at the reference position (the state where the crown 7 is pushed in /
The contact 315 on the circuit board 31 and the contact portion 755 of the reset lever 75 come into contact with each other by moving from the 0th stage) to the side (the operation of pulling out the crown 7 by one stage). Conversely, when the crown 7 is pushed out from the state where the crown 7 is pulled out,
Since the contact 715 and the contact portion 755 moves away again, the drive signal from the drive circuit is output to the step motor 40. Therefore, the motor rotor 42 starts rotating again. When the crown 7 is pushed in, the train wheel setting lever 74 is separated from the fifth wheel & pinion 51, and the second hand 161 resumes rotation.

(Structure of Wheel Train and Its Bearing) FIG.
FIG. 9A is a longitudinal section around a timepiece train wheel configured in the pointer-type electronic timepiece of the present embodiment. FIG. 9A is a longitudinal section near a power generation wheel train configured in the pointer-type electronic timepiece. FIG. 1B is an enlarged view of a contact portion that supports the rotation center axis of the power generation rotor, FIG.
Numeral 0 is a vertical section near a small generator constructed in the pointer-type electronic timepiece.

As shown in FIG. 8, the oscillating weight 25 has been completely fixed to the ball bearing 27 fixed to the oscillating weight receiver 26 by the oscillating weight fixing screw 250. The wheel train receiver 8 is provided between the ball bearing 27 and the main plate 200.
0 is arranged. With respect to the holes 801 and 802 formed in the train wheel receiver 80, one end of the rotation center shafts 530 and 510 of the third wheel 53 and the fifth wheel 51 is passed through the pit stones 531 and 511. Supported. Also, for the holes 201 and 202 formed in the base plate 200,
Center of rotation 530, 51 of third wheel 53 and fifth wheel 51
The other end of the shaft 0 is supported via pits 532, 512.

The wheel 53 of the third wheel 53 and the fifth wheel 51
2 and 512, the hour wheel 56
Is extended. The hour wheel 56 has a shape in which an inner peripheral portion 561 of the end surface on the side where the hour hand is located is shaved, and an outer peripheral portion 562 of the opposite end surface is shaved. Therefore, the hour wheel 56 and the pit stone 532,
A gap Gl for holding the lubricating oil is provided between the gap G1 and the gap 512.

The dial 3 of the timepiece is laminated on the main plate 200. Since the dial 3 is provided with the hole 301, the center axis of rotation of each wheel train can be projected. It is.

The dial 3 is arranged along the end face on the side where the hour hand is located, of both end faces of the hour wheel 56. However, the hour wheel 56 is an inner peripheral portion 5 of the end face on the side where the hour hand is located.
Since the portion 61 is cut, a disc spring 303 can be disposed between the portion 61 and the dial 3. Therefore, the hour wheel 56
If one disc spring 303 attached to the wheel is disposed between the hour wheel 56 and the dial 3, the hour wheel 56 and the dial 3 can be separated by an amount corresponding to the gap G2 in this portion. . Therefore, when the hole 301 is drilled in the dial 3, the hour wheel 56
Of even if the burr (burr portions) occurs toward the gear portion, the rotation of the hour wheel 56 is not hindered by the burr. Moreover, the inner peripheral portion 561 of the hour wheel 56 and the disc spring 30
3, the gap G2 is reliably secured.
The gap between the dial 6 and the dial 3 can be reduced to the minimum required size. Therefore, the pointer-type electronic timepiece 1 can be reduced in thickness.

(Structure for Determining the Propagation Wheel of the Power Generation Port) As shown in FIG. 9 (A), at the position deviated from the center of the main plate 200, among the gears constituting the power generation Power generation rotor transmission having a pinion 621 that meshes with the weight wheel 61
A flywheel 62 is supported between the rotary weight receiver 26 and the main plate 200. In this power generation rotor transmission wheel 62, one shaft end of a rotation center shaft 620 is supported by a ball bearing 28.
6 is held in a hole 263 formed in FIG.

The ball bearing 28 has a rotation center
And a ring-shaped frame 280 that accommodates the balls 281.
You. The frame body 280 includes a ring-shaped frame piece 282 for holding the ball 281 from two directions, and a receiving piece 283 adjacent to the frame piece 282 for preventing the ball 281 from falling off. On the other hand, a step 626 is formed in a portion of the rotation center shaft 620 of the power generation rotor transmission wheel 62 that faces the receiving piece 283. Here, the ball 281
It is (among both end surfaces of the frame 280, the inner peripheral end of the end surface on the side where the stepped portion 626 is located edge) inner peripheral edge of the receiving piece 283 gap partly from the rotation center axis 620, protruding with As a result, it is in contact with the step 626.

In the bearing structure thus configured, since the ball 281 is in contact with the side surface of the rotation center shaft 620, the swing of the rotation center shaft 620 in the left-right direction is completely prevented. The rotation center shaft 620 has a play in the vertical direction. However, even if the rotation center shaft 620 is deviated by a certain amount or more in the direction of the arrow D, the ball 281 abuts on the step portion 626. Is also completely determined in the direction of arrow D. For this reason, the power generator
When the data transmission wheel 62 rotates, the step portion 626 and the ball 281 are not in sliding friction but are in rolling friction, so that a smaller wheel train load loss can be suppressed. Therefore, in the pointer-type electronic timepiece 1 of this example, it is possible to determine the opening of the power generation rotor transmission wheel 62 with a simple structure, and to reduce the thickness of the pointer-type electronic timepiece 1. In addition, since the friction of the bearing portion is small in the power generation rotor transmission wheel 62 which is most likely to receive the side pressure in the wheel train, the power generation efficiency is improved.

In the power generation rotor transmission wheel 62, a hole stone 622 is fitted to the other end of the rotation center shaft 620, and the hole stone 622 is held in the hole 204 formed in the base plate 200. The direction toward the main plate 200 is determined by this portion.

(Lubricant Oil Scattering Prevention Structure) In addition, beside the gear 623 of the power generation rotor transmission wheel 62,
A wall portion 804 formed at the end of the train wheel receiver 80 is located. That is, in this example, between the timepiece wheel train 50 and the power generation wheel train 60, a part of the wheel train receiver 80 forms a wall for preventing lubricating oil scattering. Therefore, power generation low
Even if the transmission wheel 62 rotates at high speed, its rotation center axis 62
The lubricating oil applied to the 0 and the gear 623 does not scatter to the third wheel 53 and the like. Accordingly, it is difficult for the hand operation abnormality such as stop or delay of the third wheel 53 and the like caused by the viscosity of the oil to occur, and it is possible to suppress the power consumption for compensating for the hand operation abnormality. Moreover, since the scattering of the lubricating oil is prevented by using a part of the conventional wheel train receiver 80, the pointer-type electronic timepiece 1 can be made thin. In addition, since the lubricating oil does not scatter around, the gap between the components can be reduced. Therefore,
Since the space for arranging the parts can be secured by that much, the pointer-type electronic timepiece 1 can be made thinner.

[0069] In the side of the generator rotor transmission wheel 62, power generation and Russia
The power generation rotor 21 including the pinion 210 that meshes with the gear 623 of the power transmission wheel 62 includes the rotating weight receiver 26 and the main plate 200.
Is supported between.

Here, the rotation center axis 2 of the power generation rotor 21
In No. 11, a hole stone 212 is fitted to one shaft end.
The hole stone 212 is held in a hole 266 formed in the rotary weight receiver 26 in a state of being fitted in the ring-shaped cap 213. Further, the rotation center shaft 211 of the power generation rotor 21 has a hole stone 214 fitted at the other shaft end. The hole stone 214 is held in a hole 205 formed in the base plate 200 in a state of being fitted to the ring-shaped cap 215.

In this example, since the structure of each bearing portion using the pit stones 212 and 214 and the caps 213 and 215 is the same, the pit stones 214 and the cap 215 are used with reference to FIG. The description will focus on the bearing portion.

In this bearing portion, the cap 215
Is in a state of covering the side surface of the pit stone 214 and partially covering the end face 216 of the pit stone 214 facing the power generation rotor 21 from the outer peripheral side. Therefore, an annular groove G <b> 3 for retaining lubricating oil is formed between the inner peripheral surface of the cap 215 and the outer peripheral side surface of the rotation center shaft 211 on the inner side of the end surface 216 of the pit stone 214. This annular groove G3
Has an opening width of, for example, about 40 μm to about 100 μm. Moreover, the depth of the annular groove G3 substantially corresponds to the thickness of the cap 215, and is relatively deep. Therefore, even if the power generation rotor 21 rotates at a high speed, the lubricating oil does not flow out from the annular groove G3 and does not scatter around. Therefore, the interval between the components can be narrowed, and the electronic timepiece 1 can be made thinner.

In each wheel train, the lubricating oil tends to be most easily scattered from the bearing portion of the power generating rotor 21 rotating at the highest speed.
Since the above-described bearing structure is employed for the rotation center shaft 211, the scattering of the lubricating oil can be effectively prevented.

Here, the cap 215 and the pit stone 214 are formed as separate components, and the pit stone 214 is mounted inside the cap 215. Therefore, in this example, the pit stones 214 are immersed in the processing liquid with the pit stones 214 attached to the cap 215 so that the lubricating oil does not seep and spread between the pit stones 214 and the cap 215, and the surface of the lubricating oil is Apply a surface treatment to prevent diffusion. That is, a treatment liquid is prepared by dissolving a fluorine-based coating agent in a fluorine-based solvent, and immersed in the state where the pit stone 214 is mounted on the cap 215, and then dried to remove the solvent. As a result, a thin layer of a fluorine-based coating agent is formed on the surface of the pit stone 214 and the cap 215. By performing such a surface treatment, the thin layer of the fluorine-based coating agent repels the lubricating oil, so that the lubricating oil does not seep and diffuse between the pit stone 214 and the cap 215.

[0075] for the purpose of performing such a surface treatment effectively, in this example, we are assured actively gap 222 of predetermined dimension between the end face 216 of the cap 215 and the hole stone 214. Therefore, the treatment liquid sufficiently enters between the cap 215 and the pit stone 214, so that the entire surface of the cap 215 and the pit stone 214 can be reliably subjected to the surface treatment for preventing the diffusion of the lubricating oil. Therefore, the lubricating oil held in the lubricating oil holding annular groove G3 is filled with the cap 215 and the pit stone 21.
4 does not diffuse through . In order to secure such a gap 222, in the present example, a projection 219 is formed on the cap 215 for determining the degree when the pit stone 214 is mounted inside the cap 215. Therefore, the gap 222 having a dimension corresponding to the height of the projection 219 can be reliably ensured only by mounting the pit stone 214 inside the cap 215. The interval between the gaps 222 is, for example, about 10 μm in consideration of forming a coating layer of about 1 μm by surface treatment and processing accuracy.

In the present example, the rotation center shaft 211 is positioned near a portion of the outer peripheral side surface supported by the pits 212 and 214 toward a portion forming the annular groove G3 for holding lubricating oil. It has a conical portion 217 of increasing diameter. For this reason, even if the lubricating oil is scattered and adheres to the rotation center shaft 211, if the lubrication oil adheres to the conical portion 217, the lubricating oil adhering there is removed by the rotation center extract 211. When rotated, it receives the centrifugal force and moves toward the large-diameter portion (toward the annular groove G3 for holding lubricating oil). As a result, the lubricating oil is supplied to the annular groove G for retaining the lubricating oil.
Just return to 3 and do not fly around.

Further, on the outer peripheral side surface of the rotation center shaft 211,
A stepped portion 218 (a stepped portion for preventing flaking) is formed so as to protrude so as to face that of the pit stones 212 and 214. For this reason, when the rotation center shaft 211 is displaced in the axial direction, the step portion 218 abuts on the inner end surfaces of the pits 212 and 214 to prevent further displacement. Here, the position where the step portion 218 is formed on the outer peripheral side surface of the rotation center shaft 211 and the depth dimension of the annular groove G3 (thickness dimension of the cap 215 of a portion forming the annular groove G3) are determined by the following. The step portion 218 is set so as to be located in the lubricating oil holding annular groove G3 regardless of the direction of the displacement. For this reason, even if the lubricating oil attempts to scatter from inside the annular groove G3, the lubricating oil is blocked by the step portion 218 of the rotation center shaft 211, so that the lubricating oil can be more reliably prevented from being scattered. For example, in this example, the depth dimension of the annular groove G3 is set to about 100 μm
This is set as above. However, the depth dimension of the annular groove G3 is
A smaller size is more advantageous for thinning the pointer-type electronic watch,
The value is set to be the smallest value within a range in which the scattering of the lubricating oil can be prevented.

Further, concave portions 220 for lubricating oil injection are formed on the outer end surfaces of the pit stones 212 and 214. Therefore, when the lubricating oil is injected into the concave portion 220, the lubricating oil permeates into the holes of the pit stones 212 and 214 and accumulates in the lubricating oil retaining annular groove G3. Here, the outer diameter dimension D of the concave portion 220
Is greater than or equal to the outer diameter d of the current groove G3 for retaining lubricating oil, and the inner volume of the recess 220 is larger than the inner volume of the annular groove G3. Therefore, it is possible to balance the amount of the lubricating oil held by the annular groove G3 and the concave portion 220 for lubricating oil injection.

(Connecting Structure of Power Generating Stator and Magnetic Core) As shown in FIG. 10, the power generating rotor 21 is sandwiched between the power generating stators 22. The power generation stator 22 includes:
The magnetic core 24 is connected to the magnetic core 24 of the small generator 20.
And an upper magnetic core 242 laminated on the magnetic core. Among these magnetic cores, the lower magnetic core 241 and the stator 22 are connected by a magnetic core connection screw 246 and a screw seat 247.

In this connection portion, the lower magnetic core 241
Are located closer to the power generation stator 22 than the end of the upper magnetic core 242.
It extends horizontally toward. The power generation stator 22 is placed on the extension portion 240 so as to cover the extension portion 240.
Is bent as a connection end 220.
In addition, of the connecting ends 220, the core connecting screws 24
The screwing position 6 is machined so as to be a thin portion 221. Therefore, the magnetic core 24 and the power generation stator 22
Is small because it is the sum of the thickness of the lower magnetic core 241 and the thickness of the thin portion 221 of the coupling end 220 of the power generation stator 22.

As described above, the power generation stator 22 and the magnetic core 2
The cross-sectional structure of the connecting portion with the power generating stator 4 is such that the main plate 200, the magnetic core 24, and the power generating stator 24 are stacked in this order, and the connecting end 220
The upper surface 222 and the lower surface 223 of the (connection portion) are located on the periphery of the power generation rotor 21.
4 and the lower surface 225. The upper surface 222 of the connecting end 220 is connected to the power generation rotor 2.
The structure is located below the upper surface of one magnet.
Therefore, in the pointer-type electronic timepiece 1 of the present embodiment, the thickness can be reduced.

Further, in the power generating stator 22, only the thin portion 221 is a portion connected to the magnetic core 24, and the other portions remain thick. For this reason, the extended portion 2 of the lower magnetic core 241 is formed around the connection portion.
40 and the thick portion of the power generation stator 22 can be contacted. This is to prevent the magnetic flux passing through the magnetic circuit of the small generator 20 from leaking because the allowable magnetic flux amount becomes small at this portion. Since it is not necessary to reduce partially the eyes <br/> to the main plate 200 thinner such connection portions can maintain the strength of the main plate 200 remains in a high state.

(Another Embodiment) In this embodiment, the invention relating to the ball bearing with respect to the rotation center axis of the gear, relates to the power generation row of the power generation wheel train 60.
Although the bearing structure for the transmission wheel 620 has been described as an example,
This bearing structure may be applied to a gear or other rotation center shaft. Further, the bearing structure of the present example is applied to only one shaft end of the rotation center shaft 620, but the bearing structure of the present example may be applied to both shaft ends of the rotation center shaft 620.

In the bearing portion of the rotation center shaft,
Although an example in which the cavestone 214 and the cap 215 are separate bodies has been described, the cavestone 214 and the cap 21 are used.
5 may be configured as a pit and a cap in one part. In addition, the cavestone 214 and the cap 215 may be integrally formed with the base 2 as a cavestone portion and a cap portion. By integrating the components in this way, the production cost of the pointer-type electronic timepiece can be reduced.

[0085]

[0086]

[0087]

In the electronic timepiece according to the present invention, the rotating weight has a thin portion and a thick portion to increase the amount of imbalance, and in addition to this, the rotating weight has The feature is that each member is arranged in an optimal state.
Therefore, according to the present invention, a narrow gap corresponding to the rotation region of the inner thickness portion of the rotation region of the oscillating weight can be effectively utilized, so that a thin electronic timepiece can be provided.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram showing the overall configuration of a pointer-type electronic timepiece.

FIG. 2 is an explanatory diagram showing a planar arrangement structure of a small generator and the like in the pointer-type electronic timepiece according to the embodiment of the present invention.

FIG. 3 is an explanatory view showing a planar arrangement structure of a step motor, a timepiece train wheel, a circuit board, and the like in the pointer-type electronic timepiece according to the embodiment of the present invention.

FIG. 4 is a longitudinal sectional view showing an arrangement relationship between a circuit board and a rotary weight in the pointer-type electronic timepiece according to the embodiment of the present invention.

FIG. 5 is an explanatory view showing a planar arrangement relationship of a time adjusting mechanism in the pointer-type electronic timepiece according to the embodiment of the present invention.

FIG. 6 is a longitudinal sectional view showing an arrangement relationship of a mechanism for adjusting the time in the pointer-type electronic timepiece according to the embodiment of the present invention.

FIG. 7A is a longitudinal cross-sectional view of a time-setting mechanism portion of a pointer-type electronic timepiece according to an embodiment of the present invention when cut in a radial direction, and FIG. 7B is a side cross-sectional view of this portion. is there.

FIG. 8 is a longitudinal sectional view of the vicinity of a timepiece train wheel provided in the pointer-type electronic timepiece according to the embodiment of the present invention.

FIG. 9A is a vertical cross-sectional view of the vicinity of a power generation wheel train included in the pointer-type electronic timepiece according to the embodiment of the present invention, and FIG.
It is an enlarged view of a bearing part which supports a rotation center axis of a power generation rotor.

FIG. 10 is a longitudinal sectional view showing the vicinity of a small generator included in the pointer-type electronic timepiece according to the embodiment of the present invention.

FIG. 11 is an explanatory view showing a conventional bearing structure.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Pointer type electronic timepiece 2 ... Base 20 ... Small generator 21 ... Generator rotor 22 ... Generator stator 23 ... Generator coil 24 ... Magnetic core 25 ... ..Rotating weight 26 ... Rotating weight receiver 27,28 ... Ball bearing 30 ... Secondary power supply 31 ... Circuit board 40 ... Step motor 41 ... Motor coil 42 ... Motor rotor 43 ・ ・ ・ Motor stator 50 ・ ・ ・ Watch train wheel 56 ・ ・ ・ Hour wheel 60 ・ ・ ・ Power generation wheel train 62 ・ ・ ・ Power generation rotor transmission wheel 74 ・ ・ ・ Reset lever 75 ・ ・ ・Reset lever 80: train wheel receiver 200: ground plate 205: through hole of circuit seat (circuit part arrangement hole) 207: recess of circuit receiver seat (circuit part arrangement hole) 211: power generation Central axis of rotation of rotor for use 212, 214 ... hole 213, 215: Cap 211: Rotational center axis 217: Conical surface portion 218: Stepped portion for preventing flaking 219: Protrusion for determining degree 222: End face of pit stone 251: Thin portion of rotating weight 252: Thick portion of rotating weight 303: Disc spring 280: Frame body 281: Ball 282: Frame piece 283 ...・ Receiving piece 311 ・ ・ ・ Circuit receiving seat 620 ・ ・ ・ Rotation center axis of power generation rotor transmission wheel G1 ・ ・ ・ Gap for holding lubricating oil G2 ・ ・ ・ Gap between hour wheel and dial G3 ・ ・ ・Annular groove to hold lubricating oil

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) G04C 10/00 G04C 3/14

Claims (7)

(57) [Claims] 1. A generator having a power train for transmitting external force to a generator rotor, a secondary power supply for storing electric energy generated by the generator, and a drive circuit supplied with power from the secondary power supply An electronic timepiece having, on a base, a circuit unit having a structure, a step motor driven by the drive circuit, and a timepiece train wheel for transmitting a rotational driving force from the step motor to a time display member. A rotating weight for transmitting to the power generating rotor via a power train, wherein the rotating weight has a rotating center portion supported by a rotating weight receiver , and a thin portion formed around the rotating center portion; A thick portion formed on the outer peripheral side of the thin portion, wherein the timepiece wheel train and the power generation wheel train are arranged in a rotation region of the thin portion on the base, and the circuit Of the thick part of the part The portion located in the region is arranged in a circuit portion arrangement hole configured as a concave portion or a through hole in the base, the base includes a metal ground plate, and a circuit receiving seat formed of an insulating material, An electronic timepiece, wherein an electronic component constituting the drive circuit is arranged in the circuit portion arrangement hole provided in the circuit receiving seat. 2. The timepiece wheel train according to claim 1, wherein the rotation region of the thin portion on the base is mechanically connected to a rest operated by an external operation to an external operation member. A trainer lever that stops the movement of the circuit portion is also disposed, and the portion of the circuit portion that is disposed in the circuit portion placement hole in the rotation region of the thick portion is mechanically connected to the shim, An electronic timepiece, which is a reset lever that operates as a switch for temporarily stopping the drive of the step motor by the drive circuit and returning the drive to the step motor. 3. The screwed portion of a rotary weight receiver that supports the rotary weight and the power generation wheel train via bearings in the rotation area of the thin portion on the base according to claim 1 or 2. An electronic timepiece, wherein is disposed. 4. The rotary weight receiver according to claim 3,
An electronic timepiece, the entirety of which is disposed in a rotation area of the thin portion on the base. 5. The timepiece train wheel according to claim 1, wherein the timepiece wheel train includes an hour wheel to which an hour hand is connected, and of both end faces of the hour wheel, a side on which the hour hand is located. An electronic timepiece, wherein an inner peripheral portion of the fine surface is shaved at an end surface, and an outer peripheral portion of the end surface is shaved at an opposite end surface. 6. The lubricating oil scattered between the timepiece wheel train and the power generation wheel train by a part of a wheel train receiver supporting the hour hand wheel train according to any one of claims 1 to 5, An electronic timepiece comprising a prevention wall. 7. The connection part between the power generation stator and the power generation core of the power generator according to any one of claims 1 to 6,
The power generation stator in which a base plate, the power generation core, and the power generation stator are stacked in this order, and upper and lower surfaces of a connection portion of the power generation stator with the power generation core are located around the power generation rotor. An electronic timepiece having a cross-sectional structure that is located between upper and lower surfaces of the power generation rotor and an upper surface of the connecting portion is positioned below an upper surface of a magnet of the power generation rotor.