Electronically controlled mechanical timepiece

Abstract

To provide an electronically controlled mechanical timepiece with which it is possible to improve power generation capability and improve the freedom of layout of generators and other components.SOLUTION: The electronically controlled mechanical timepiece comprises: a mainspring that is wound up by a winding mechanism; a first ring row; an indicator; a speed governor for controlling the rotation speed of the first ring row; a control device for outputting a control signal to the speed governor; a power generation mechanism for generating electric energy in conjunction with the winding mechanism; and a power storage device. The control device and the speed governor operate by electric energy stored in the power storage device, and the speed governor includes a first rotor that rotates in conjunction with the first ring row, and a first coil that generates an electromagnetic force given to the first rotor in response to the control signal and controls the rotation speed of the first ring row. The power generation mechanism includes a second ring row that increases the movement speed of the winding mechanism in conjunction with the winding mechanism, a second rotor that rotates in conjunction with the second ring row, and a second coil that generates electric energy by rotation of the second rotor.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The present invention relates to an electronically controlled mechanical clock.

Background Art

[0002] There is known an electronically controlled mechanical clock including a generator that is driven by a mainspring via a wheel train to generate an induced voltage, a pointer coupled to the wheel train, and an electronic control unit that controls the rotation period of the generator to adjust the running speed of the pointer coupled to the wheel train (see, for example, Patent Document 1). In this electronically controlled mechanical clock, a switch for short-circuiting both ends of the coil of the generator is provided, and chopping control for turning this switch on and off is performed. Thereby, when the switch is on, energy can be stored in the coil of the generator in addition to the speed control by the short brake, and when the switch is off, the induced voltage can be increased because the energy stored in the coil is included.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In order to improve the power generation ability, it is conceivable to rotate the rotor included in the generator at high speed. However, in the conventional electronically controlled mechanical clock, the speed control by chopping control and the process of increasing the induced voltage are performed simultaneously, and the rotor cannot be rotated at high speed. In addition, the power generation ability can be improved by increasing the inductance value of the coil, but for this purpose, it is necessary to increase the number of turns of the coil, and as the coil becomes larger, the generator becomes larger, and there is a problem that the degree of freedom in the layout of the generator and other components decreases when the generator is arranged in the movement.

Means for Solving the Problems

[0005] The electronically controlled mechanical clock of the present disclosure includes a mainspring, a winding mechanism for winding up the mainspring, a first wheel train for transmitting the mechanical energy of the mainspring, hands driven by the first wheel train to display time, a speed regulating device for controlling the rotational speed of the first wheel train, a control device for outputting a control signal for controlling the rotational speed to the speed regulating device, a power generation mechanism for generating electrical energy in conjunction with the winding mechanism, and a power storage device for storing the electrical energy generated by the power generation mechanism. The control device and the speed regulating device operate with the electrical energy stored in the power storage device. The speed regulating device includes a first rotor that rotates in conjunction with the first wheel train, and a first coil that generates an electromagnetic force applied to the first rotor according to the control signal to control the rotational speed of the first wheel train. The power generation mechanism includes a second wheel train that is linked to the winding mechanism and increases the movement speed of the winding mechanism, a second rotor that rotates in conjunction with the second wheel train, and a second coil that generates the electrical energy by the rotation of the second rotor.

Brief Description of the Drawings

[0006]

Figure 1

Figure 2

Figure 3

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Figure 8

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Figure 10

Figure 11

Figure 12

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Figure 14

[0007] [First Embodiment] Hereinafter, the electronically controlled mechanical watch 1 of the first embodiment will be described with reference to the drawings. As shown in FIG. 1, the electronically controlled mechanical watch 1 includes a case 2, a dial 3, an hour hand 4, a minute hand 5, a second hand 6, a balance wheel 7, and a date wheel 8 which are hands. As shown in FIG. 2, the electronically controlled mechanical watch 1 includes a movement 10. The movement 10 includes an automatic winding mechanism 11, a mainspring 20, a first wheel train 30, a speed regulating device 40, a control unit 50, a second wheel train 60, an electromagnetic generator 70, a rectifying circuit 80, a power storage device 90, and a crystal oscillator 95.

[0008] [Winding Mechanism] As shown also in FIG. 3, the automatic winding mechanism 11 includes a rotor 12 and a winding wheel train 15. The rotor 12 is rotatably provided on the movement 10 by a rotating shaft 13 composed of a bearing. A rotor weight 14 is integrally provided on the rotor 12. The winding wheel train 15 includes an eccentric wheel 16, a pawl lever 17, and a transmission wheel 18. The eccentric wheel 16 includes an eccentric shaft member 161 and an eccentric gear 162 attached to the eccentric shaft member 161. The eccentric shaft member 161 has an eccentric portion eccentric with respect to the rotation axis of the eccentric gear 162, and a claw lever 17 is rotatably attached to this eccentric portion. The eccentric gear 162 meshes with the rotating weight kana 14 and rotates in conjunction with the rotation of the rotating weight 12. As a result, the eccentric portion of the eccentric shaft member 161 revolves around the rotation axis of the eccentric gear 162, and the claw lever 17 attached to the eccentric portion moves forward and backward in the direction approaching and moving away from the transfer wheel 18.

[0009] The claw lever 17 includes a pulling claw lever portion 171 and a pushing claw lever portion 172 that sandwich the transfer gear 181 of the transfer wheel 18 in a plan view. The transfer wheel 18 includes a transfer gear 181 and a transfer kana 182. The pulling claw of the pulling claw lever portion 171 and the pushing claw of the pushing claw lever portion 172 engage with the transfer gear 181, and the transfer wheel 18 rotates in one direction in conjunction with the forward and backward movement of the claw lever 17. The rotation of the transfer wheel 18 is transmitted to a square hole wheel 25 described later, and the mainspring 20 is wound up by the rotation of the square hole wheel 25.

[0010] [Mainspring] The mainspring 20 is housed in a perfume box wheel 21 shown in FIG. 3. The perfume box wheel 21 includes a perfume box shaft 22, a perfume box gear 23, and a perfume box lid 24. The mainspring 20 has its outer end fixed to the perfume box gear 23 and its inner end fixed to the perfume box shaft 22. The perfume box shaft 22 rotates integrally with the square hole wheel 25. The square hole wheel 25 meshes with the transfer kana 182 and rotates when the rotation of the rotating weight 12 is transmitted through the rotating weight kana 14, the eccentric wheel 16, the claw lever 17, and the transfer wheel 18. When the square hole wheel 25 rotates, the perfume box shaft 22 rotates, so the mainspring 20 is wound up. Therefore, the mainspring 20 is wound up by an automatic winding mechanism 11 including the rotating weight 12 and the winding-up wheel train 15. According to this automatic winding mechanism 11, for example, when the user wears the electronic control type mechanical watch 1 on the wrist and swings the wrist to rotate the rotating weight 12, the mainspring 20 can be automatically wound up.

[0011] [First gear train] As shown in FIG. 3, the first gear train 30 is a speed increasing gear train composed of the second gear 32, the third gear 33, the fourth gear 34, the fifth gear 35, and the sixth gear 36. The kana of the second gear 32 meshes with the incense box gear 23, and the kana of the third gear 33 meshes with the second gear 32. The kana of the fourth gear 34 arranged coaxially with the second gear 32 meshes with the third gear 33, and the kana of the fifth gear 35 meshes with the fourth gear 34. The kana of the sixth gear 36 meshes with the fifth gear 35, and the rotor kana 43 provided on the speed regulating rotor 42 of the speed regulating device 40 meshes with the sixth gear 36. Therefore, the rotation of the incense box gear 23 that is rotationally driven by the unwinding of the mainspring 20 is increased in speed by the first gear train 30 and transmitted to the speed regulating rotor 42. The second hand 6 is attached to the shaft of the fourth gear 34. The minute hand 5 is attached to the cylindrical kana 37 that rotates integrally with the second gear 32. The hour hand 4 is attached to the cylindrical wheel 38 that rotates via a back-of-the-day wheel (not shown in detail) on the cylindrical kana 37.

[0012] [Speed regulating device] The speed regulating device 40 includes a speed regulator 41 shown in FIG. 3. The speed regulator 41 includes a speed regulating rotor 42 that is a first rotor, a rotor kana 43, a rotor inertia plate 44, a stator 45, and a speed regulating coil 46 that is a first coil. The speed regulating rotor 42 is magnetized with two poles and rotates together with the rotor kana 43 when the rotor kana 43 meshes with the sixth gear 36. The rotor inertia plate 44 stabilizes the rotation of the speed regulating rotor 42. In this embodiment, two stators 45 are provided, and an opening for arranging the speed regulating rotor 42 is formed on one end side of each stator 45. Further, the speed regulating coil 46 is wound around one of the two stators 45. Note that, as the speed regulator 41, the speed regulating coil 46 may be wound around the two stators 45. Also, similar to the electromagnetic generator 70 described later, a speed regulator may be configured by connecting one stator having an opening for arranging a rotor and a magnetic core around which the speed regulating coil is wound.

[0013] [Second gear train and electromagnetic generator] As shown in FIG. 3, the electromagnetic generator 70 includes a magnetic core 71, a power generation coil 72 which is a second coil wound around the magnetic core 71, a stator 73 connected to both ends of the magnetic core 71, a power generation rotor 74 which is a second rotor disposed in the opening of the stator 73 and magnetized to two poles, and a rotor bracket 75 formed integrally with the power generation rotor 74. Here, the power generation coil 72 and the speed control coil 46 are arranged at an angle of approximately 90° with respect to each other in a plan view when the electronic control type mechanical clock 1 is viewed from the front side. That is, the intersection angle between the longitudinal direction of the magnetic core 71 around which the power generation coil 72 is wound and the longitudinal direction of the stator 45 around which the speed control coil 46 is wound is approximately 90°. The second gear train 60 transmits the rotation of the rotating weight 12 to rotate the power generation rotor 74 which is a second rotor, and includes a gear 61 meshing with the rotor bracket 75 and a bracket 62 meshing with the rotating weight bracket 14. Note that the second gear train 60 may be configured by combining a plurality of gears, as long as it can increase the speed of the rotation of the rotating weight 12 and transmit it to the power generation rotor 74. When the rotating weight 12 rotates, the power generation rotor 74 is rotated via the second gear train 60 which is, for example, a 100-fold speed increasing gear train. Thereby, the second rotation speed of the power generation rotor 74 which is a second rotor can be made as high as, for example, about 100 Hz. The induced electromotive force generated in the power generation coil 72 is represented by Equation (1) below. Rotating the power generation rotor 74 at a high speed increases the amount of change in the magnetic flux, and a large electromotive force can be obtained. In Equation (1), e is the induced electromotive force, N is the number of turns of the coil, dφ is the amount of change in the magnetic flux, and dt is the time of change in the magnetic flux.

[0014]

Equation

[0015] FIG. 4 is a diagram showing the circuit configuration of the movement 10. The movement 10 includes a speed control coil 46 which is a first coil, a power generation coil 72 which is a second coil, a rectifier circuit 80 connected to the power generation coil 72 for rectifying the alternating current generated by the power generation coil 72 into a direct current, a speed control unit 47 connected to the speed control coil 46 for controlling the speed of a speed control rotor 42 which is a first rotor, a control unit 50 which is a control device, a power storage device 90, a voltage detection unit 93, and a crystal oscillator 95. The control unit 50 includes an oscillation circuit 51, a rotation detection circuit 52, a control circuit 53, a power generation detection circuit 54, and an overcharge prevention circuit 55. Note that the control unit 50, the rectifier circuit 80, the power storage device 90, and the voltage detection unit 93 are connected to a first power supply line 91 and a second power supply line 92. In this embodiment, the potential of the first power supply line 91 is VDD, and the potential of the second power supply line 92 is VSS.

[0016] The rectifier circuit 80 is a circuit for rectifying the alternating current generated by the power generation coil 72 of the electromagnetic generator 70 into a direct current, and various rectifier circuits such as boost rectification, full-wave rectification, half-wave rectification, and transistor rectification can be used.

[0017] The power storage device 90 stores the electrical energy generated by the power generation coil 72 of the electromagnetic generator 70 and rectified by the rectifier circuit 80. The electrical energy stored in the power storage device 90 is supplied to the control unit 50. The current consumption of the control unit 50 is about 50 nA. Therefore, the power storage device 90 may be a chip-type all-solid-state battery with a capacity of about several tens of μAH. The all-solid-state battery does not require a large space and has little battery deterioration, so long-term reliability can also be ensured. Note that the power storage device 90 is not limited to an all-solid-state battery and may be configured by a secondary battery, a capacitor, or the like.

[0018] The voltage detection unit 93 detects the voltage of the power storage device 90 and outputs the detection result to the control unit 50. The crystal oscillator 95 is oscillated by the oscillation circuit 51 of the control unit 50 and outputs a clock signal of a predetermined frequency. Note that the oscillator that outputs the clock signal is not limited to the crystal oscillator 95, and it may be a silicon-based MEMS oscillator. MEMS is an abbreviation for Micro Electro Mechanical Systems. When an MEMS oscillator is used, the accuracy is inferior to that of the crystal oscillator 95, but miniaturization is possible.

[0019] The oscillation circuit 51 oscillates the crystal oscillator 95, divides the oscillation signal, and outputs a reference clock Fs of a predetermined frequency to the control circuit 53. The frequency of the reference clock is set according to the rotation period of the speed control rotor 42 of the speed control mechanism 41 that is linked to the movement speed of the pointer, that is, the first rotation speed. For example, when the rotation period (first rotation speed) of the speed control rotor 42 at which each pointer provided on the first wheel train 30 is accurately moved is 6 Hz, the frequency of the reference clock is also set to 6 Hz. When the rotation period (first rotation speed) of the speed control rotor 42 is 8 Hz, the frequency of the reference clock is also set to 8 Hz. As described above, the second rotation speed of the power generation rotor 74, which is the second rotor, is about 100 Hz, which is higher than the first rotation speed.

[0020] The rotation detection circuit 52 is a circuit that detects the rotation period of the speed control rotor 42. For example, it is composed of a waveform shaping circuit and a monostable multivibrator connected to the speed control unit 47 of the speed control device 40. The waveform shaping circuit is composed of an amplifier and a comparator, and converts a sine wave, which is an electromotive voltage waveform, into a rectangular wave. The monostable multivibrator functions as a band-pass filter that allows only pulses below a certain period to pass through, and outputs a rotation detection signal FG1 with noise removed to the control circuit 53. That is, the rotation detection circuit 52 outputs a rotation detection signal FG1 based on the electromotive voltage waveform of the speed control coil 46, which is the first coil.

[0021] The control circuit 53 outputs a control signal P1, which is a chopper signal with a variable pulse width, generated based on the comparison result between the reference clock Fs input from the oscillation circuit 51 and the rotation detection signal FG1 input from the rotation detection circuit 52, to the speed control unit 47. The processing of this control circuit 53 will be described later. The power generation detection circuit 54 detects the generated voltage of the electromagnetic generator 70, and is composed of, for example, a comparator connected to the rectifier circuit 80 to compare the generated voltage with a threshold voltage. The power generation detection circuit 54 of the present embodiment outputs an L-level signal to the control circuit 53 while not detecting power generation, and outputs an H-level signal to the control circuit 53 while detecting power generation. When the voltage of the power storage device 90 detected by the voltage detection unit 93 becomes equal to or higher than a preset threshold voltage, the overcharge prevention circuit 55 disconnects the switch provided in the first power supply line 91 or the second power supply line 92 that charges the power storage device 90 to prevent overcharging of the power storage device 90.

[0022] [Speed control unit] As shown in FIG. 5, the speed control unit 47 is a half-wave rectifier circuit, and chops to short-circuit the speed control coil 46 of the speed governor 41 to control the rotational speed of the speed control rotor 42, that is, the first wheel train 30, via the speed control coil 46. The speed control unit 47 includes a field-effect transistor 471, a diode 472, and a boost capacitor 473. The boost capacitor 473 is connected between the first power supply line 474 and the second power supply line 475. In the present embodiment, the potential of the first power supply line 474 is VDD1, and the potential of the second power supply line 475 is VSS1. Note that the potential VDD1 may be the same as the potential VDD or a different potential. Similarly, the potential VSS1 may be the same as the potential VSS or a different potential. The first terminal MG1 of the speed control coil 46 is connected to the first power supply line 474. The field-effect transistor 471 is composed of a P-channel field-effect transistor connected between the second terminal MG2 of the speed control coil 46 and the first power supply line 474, and functions as a switch to disconnect and connect between the first terminal MG1 and the first power supply line 474. The gate of the field-effect transistor 471 is connected to the control circuit 53. The diode 472 is disposed between the second terminal MG2 of the speed control coil 46 and the second power line 475. The diode 472 may be any unidirectional element that allows current to flow in one direction, and its type is not limited. For example, a Schottky barrier diode or a silicon diode can be used.

[0023] In the above speed control unit 47, when the speed control rotor 42 of the speed control device 40 rotates via the first wheel train 30 due to the mechanical energy stored in the flywheel 20, an induced voltage is generated in the speed control coil 46. At this time, when the field effect transistor 471 is in the off state and the induced voltage generated at the first terminal MG1 is higher than the induced voltage at the second terminal MG2, current flows through the path of the first terminal MG1, the first power line 474, the boost capacitor 473, the second power line 475, the diode 472, and the second terminal MG2, and charge is stored in the boost capacitor 473.

[0024] The speed control unit 47 is subjected to chopping control by a control signal P1, which is a chopper signal from the control circuit 53. The chopping control is a control that turns the field effect transistor 471 on / off at a frequency higher than the rotation of the speed control rotor 42 by the control signal P1 output from the control circuit 53. By this control, the short circuit and open circuit at both ends of the speed control coil 46 are repeated. During the period when the field effect transistor 471 is on, both ends of the speed control coil 46 are short-circuited and in a short state, so a large current flows inside the speed control coil 46. Next, when the field effect transistor 471 is turned off, the current flowing through the field effect transistor 471 at that moment is converted into voltage and a high induced voltage is generated.

[0025] In addition, the control for turning on and off both ends of the speed control coil 46 by chopping control is related to the speed control of the speed control rotor 42. Fig. 6 shows a control signal P1 which is the brake signal waveform of the chopping control. The field effect transistor 471 is turned on when the control signal P1 is at the L level and turned off when the control signal P1 is at the H level. Therefore, the period during which the control signal P1 is at the L level is the brake period, and the ratio of the brake period to one cycle of the control signal P1 is defined as the duty ratio or the brake duty. That is, the brake duty means the ratio of the brake period to the period of the control signal P1. For example, in the control signal P1 of Fig. 6, the chopping period is 256 Hz, and the first half of the signal waveform has a period of 80% at the L level, that is, the brake duty is 80%, which is a waveform applying a strong brake. The second half of the signal waveform of the control signal P1 has a period of 30% at the L level, that is, the brake duty is 30%, which is a waveform applying a weak brake.

[0026] Therefore, when the field effect transistor 471 is turned on by the control signal P1 from the control circuit 53, both ends of the speed control coil 46 are short-circuited to form a closed loop. As a result, an electromagnetic force is generated by the current flowing through the speed control coil 46, and a braking force acts on the speed control rotor 42. That is, a short brake is applied to the speed regulator 41, and energy accumulates in the speed control coil 46. On the other hand, when the field effect transistor 471 is turned off by the control signal P1 from the control circuit 53, the speed regulator 41 operates, and power is generated including the energy accumulated in the speed control coil 46 during the short brake, so the generated voltage increases.

[0027] Next, the speed control by the control unit 50 will be described with reference to the flowchart of Fig. 7. The control unit 50 executes step S1 of determining whether the voltage of the power storage device 90 detected by the voltage detection unit 93, that is, the power supply voltage of the control unit 50, is greater than a predetermined value. While the control unit 50 determines NO in step S1, it continues step S1. That is, when the charging voltage of the power storage device 90 is less than the predetermined voltage, the crystal oscillator 95 may have stopped oscillating, and thus stable control cannot be achieved.

[0028] When the charging voltage detected by the voltage detection unit 93 in the control unit 50 becomes equal to or higher than the predetermined voltage and the control unit 50 determines YES in step S1, it executes step S2 which is the power generation detection process by the power generation detection circuit 54. Next, the control unit 50 executes step S3 of determining whether power generation has been detected by the power generation detection process in step S2. When the control unit 50 determines NO in step S3, it executes step S4 of executing the rotation detection process by the rotation detection circuit 52. As described above, the rotation detection circuit 52 determines that the rotation of the governor rotor 42 has been detected when the coil voltage generated in the governor coil 46 exceeds the detection threshold value, and changes the rotation detection signal FG1 from the H level to the L level.

[0029] Next, the control unit 50 executes step S5 of comparing the reference clock Fs input from the oscillation circuit 51 with the rotation detection signal FG1 which is the rotation detection result of the governor rotor 42 input from the rotation detection circuit 52. In this embodiment, the control circuit 53 has an up-down counter. The rotation detection signal FG1 is input to the up-count input of this up-down counter, and the reference clock Fs is input to the down-count input. The up-down counter is, for example, a 4-bit counter, and is initialized at the time of system reset or power-on and set to the initial count value "11". Then, when the rotation detection signal FG1 changes from the H level to the L level, the count value of the up-down counter is incremented by 1, and when the reference clock Fs changes from the H level to the L level, the count value of the up-down counter is decremented by 1. When the count value of the up-down counter is greater than the initial count value "11", the control circuit 53 determines "advance" in step S5, and when the count value of the up-down counter is less than or equal to the initial count value "11", the control circuit 53 determines "delay" in step S5.

[0030] When the control unit 50 detects the advance of the rotation of the speed control rotor 42 in step S5, the control unit 50 executes the strong brake control in step S6. Further, when the control unit 50 detects the delay of the rotation of the speed control rotor 42 in step S5, the control unit 50 executes the weak brake control in step S7. During the strong brake control in step S6, the control circuit 53 outputs a control signal P1 with a brake duty of 80%. Therefore, the brake-on time in the reference period becomes longer, and strong brake control is performed on the speed regulator 41. However, since the brake is turned off at a constant period, chopping control is performed, and the braking torque can be improved while ensuring the induced voltage. During the weak brake control in step S7, the control circuit 53 outputs a control signal P1 with a brake duty of 30%. Therefore, the brake-on time in the reference period becomes shorter, and almost no brake is applied to the speed regulator 41, that is, weak brake control is performed. After executing the brake control in step S6 or step S7, the control unit 50 returns to step S1 and continues the control.

[0031] Further, when the control unit 50 determines YES in step S3, it executes the fixed brake control in step S8. When performing the fixed brake control in step S8, the control circuit 53 continues the brake control immediately before shifting to the fixed brake control. That is, when the immediately preceding brake control is the strong brake control in step S6, the control circuit 53 outputs, as the fixed chopper signal, a control signal P1 with a brake duty of 80% when performing the fixed brake control in step S8. Also, when the immediately preceding brake control is the weak brake control in step S7, the control circuit 53 outputs, as the fixed chopper signal, a control signal P1 with a brake duty of 30% when performing the fixed brake control in step S8. Then, after executing the fixed brake control in step S8, the control unit 50 returns to step S1 and continues the control. Note that the power generation by the electromagnetic generator 70 occurs only when the arm wearing the electronic control type mechanical watch 1 moves and the rotor weight 12 rotates. Therefore, during the operation of the electronic control type mechanical watch 1, the time without power generation is longer than the time with power generation. Further, in a quartz watch that performs speed control based on the reference signal output from the crystal oscillator 95, the main factor causing the change in the accuracy of the watch is the variation of the reference signal due to temperature change. A general tuning fork type crystal oscillator 95 has a temperature characteristic curve in a quadratic curve with about 25°C at the apex. Since the temperature inside the watch when worn on the user's arm is around 25°C and hardly changes, the accuracy is stable, and there are almost no accuracy problems even if the speed control is stopped and the fixed brake control is performed during portability.

[0032] FIG. 8 is a waveform diagram showing each signal during speed regulation control by the control unit 50 and the induced voltage of the speed regulation coil 46. When the speed regulation rotor 42 rotates via the first wheel train 30 by the torque from the generator 20, a voltage is induced in the speed regulation coil 46, that is, a coil voltage, in conjunction with the rotation. This coil voltage gradually increases as the speed regulation rotor 42 rotates, and then gradually decreases. Further, a control signal P1 is output from the control circuit 53 to the field effect transistor 471 of the speed regulation unit 47. When the control signal P1 changes from the L level to the H level, that is, when the field effect transistor 471 is switched from on to off and both ends of the speed regulation coil 46 are released from the short-circuited state, an electromotive force due to self-induction is added to the induced voltage, generating a large electromotive force.

[0033] When the rotation detection circuit 52 detects that the terminal voltage of the speed regulation coil 46, that is, the coil voltage, is less than a preset detection threshold value, the rotation detection signal FG1 output to the control circuit 53 is set to the H level. When it detects that the coil voltage is equal to or greater than the detection threshold value, the rotation detection signal FG1 is set to the L level. Therefore, the control circuit 53 can detect that the speed regulation rotor 42 has rotated when the rotation detection signal FG1 changes from the H level to the L level. On the other hand, the reference clock Fs output from the oscillation circuit 51 to the control circuit 53 is a signal with a constant frequency, for example, 6 Hz. Therefore, as described above, the control circuit 53 changes the count value of the up-down counter at the timing when the rotation detection signal FG1 changes from the H level to the L level and at the timing when the reference clock Fs changes from the H level to the L level, thereby determining whether the rotation of the speed regulation rotor 42, that is, the hour hand 4, minute hand 5, and second hand 6 driven by the first wheel train 30, is delayed or advanced. In the example of FIG. 8, the count value of the up-down counter becomes "12" at the timing when the rotation detection signal FG1 changes from the H level to the L level, and the count value of the up-down counter becomes "11" at the timing when the rotation detection signal FG1 changes from the H level to the L level. Therefore, during the period T2, the strong braking control in step S6 is executed, and during the periods T1 and T3 before and after that, the weak braking control in step S7 is executed.

[0034] Also, during the period when power generation is detected by the power generation detection circuit 54 and the power generation detection signal is at the H level, the fixed brake control in step S8 is executed. In FIG. 8, since power generation is detected in the middle of the period T3 during the weak brake control, the control circuit 53 continues to output the control signal P1 for the previous weak brake control as the fixed brake control. The next period T4 is the same as the period T2, during which the count value of the up-down counter becomes "12" and the rotation of the speed control rotor 42 is advancing. However, since power generation is detected, the control circuit 53 continues the fixed brake control. In the next period T5, the count value of the up-down counter becomes "11". At the beginning of this period T5, since power generation is detected, the output of the control signal P1 for the previous weak brake control is continued as the fixed brake control. Then, power generation is no longer detected in the middle of the period T5 and it is determined as NO in step S3, so the normal rotation control after step S4 is performed. In FIG. 8, since the period T5 has a count value of "11" for the up-down counter and it is determined as "delay" in step S5, the weak brake control in step S7 is performed. Note that when the power generation detection signal changes from the H level to the L level during the period when the rotation of the speed control rotor 42 is advancing, that is, when power generation is no longer detected, since it is determined as "advance" in step S5, the strong brake control in step S6 is performed.

[0035] [Effects of the First Embodiment] According to the electronically controlled mechanical clock 1 of the first embodiment, since the speed control device 40 using the speed control machine 41 dedicated to speed control and the electromagnetic generator 70 dedicated to power generation are provided, compared with the case of providing a generator that is also used for power generation and speed control, the power generation rotor 74 can rotate at a high speed, and the power generation performance can be improved. For this reason, it is not necessary to increase the size of the power generation coil 72 of the electromagnetic generator 70. In addition, since the speed control coil 46 of the speed control machine 41 is dedicated to speed control and there is no need to increase the number of turns for power generation, it is not necessary to increase the size of the speed control coil 46 either. For this reason, there is no need to increase the size of the speed control coil 46 which is the first coil and the power generation coil 72 which is the second coil, and the degree of freedom of the component layout can be improved. In addition, since the power generation capacity of the electromagnetic generator 70 can be increased, the drive voltage of the IC constituting the control unit 50 can also be made relatively high. For this reason, there is no need to use an IC with a high cost manufactured by a special process with low power consumption as a component such as an IC, and a low-cost IC or the like manufactured by a general-purpose process can be used.

[0036] The mainspring 20 can be wound up by the rotating weight 12 and the winding wheel train 15, and the electromagnetic generator 70 can be operated by the rotating weight 12 and the second wheel train 60. Therefore, if the user wears the electronically controlled mechanical clock 1 on the wrist or the like and uses it, the winding up of the mainspring 20 and the power generation by the electromagnetic generator 70 can be automatically performed. For this reason, there is no need for the user to manually wind up the mainspring 20 or operate the electromagnetic generator 70, and the convenience can be improved. In addition, since the power generation rotor 74 is dedicated to power generation, the speed increase ratio of the second wheel train 60 that transmits the rotation of the rotating weight 12 to the power generation rotor 74 can also be set to a speed increase ratio that can maximize the power generation capacity of the electromagnetic generator 70, and a high power generation capacity can be obtained.

[0037] A power generation detection circuit 54 for detecting the power generation state of the electromagnetic generator 70 is provided. Since the control circuit 53 executes fixed brake control and stops the control of the rotational speed during power generation detection, it is possible to prevent the electromagnetic noise generated during power generation from being misdetected as a rotation detection signal or the like, and prevent the indicated time of the pointer from deviating significantly due to such misdetection. Also, during power generation detection, since fixed brake control is performed, the rotational speed of the speed regulation coil 46 can be appropriately controlled, and the hour hand 4, minute hand 5, and second hand 6 can also operate with almost no deviation in the indicated time.

[0038] In fixed brake control, since control is performed using the control signal P1 with a pulse width immediately before detecting power generation, the speed regulation control immediately before detecting the power generation state can be continued, and the rotational speed of the speed regulation rotor 42 can be appropriately controlled.

[0039] Since the speed regulation coil 46 of the speed regulator 41 and the power generation coil 72 of the electromagnetic generator 70 are arranged at an angle of approximately 90° to each other, the electromagnetic coupling between the speed regulation coil 46 and the power generation coil 72 can be weakened, and it is possible to avoid the electromagnetic noise generated from the power generation coil 72 during power generation from jumping into the speed regulation coil 46 and misdetecting the rotation detection. As a power generation mechanism, an electromagnetic generator 70 having a power generation coil 72 and a power generation rotor 74 is provided. Therefore, it is not necessary to provide a dial plate made of a synthetic resin having light transmittance for using a solar panel, and a dial plate made of metal can be used to improve the appearance design of the clock.

[0040] [Second Embodiment] The electronically controlled mechanical clock 1B of the second embodiment is different from the first embodiment in that, as shown in FIG. 9, the control unit 50B of the movement 10B does not include the power generation detection circuit 54. For this reason, in the movement 10B, the same components as those of the movement 10 of the first embodiment are denoted by the same reference numerals, and the description thereof is omitted. In the movement 10B of the second embodiment, since the control unit 50B does not include the power generation detection circuit 54, as shown in the flowchart of FIG. 10, when it is detected in step S1 that the power supply voltage is greater than a predetermined value, the rotation detection circuit 52 performs the rotation detection process of step S4. Then, the control unit 50B compares the reference clock Fs and the rotation detection signal FG1 in step S5. If the rotation detection signal FG1 is advanced, the strong brake control of step S6 is executed. If the rotation detection signal FG1 is delayed, the weak brake control of step S7 is executed.

[0041] [Effect of the Second Embodiment] According to the electronically controlled mechanical watch 1B of the second embodiment, the same effects as those of the electronically controlled mechanical watch 1 of the first embodiment can be achieved. Further, although the control unit 50B does not include the power generation detection circuit 54, similar to the electronically controlled mechanical watch 1 of the first embodiment, the speed regulation coil 46 of the speed regulator 41 and the power generation coil 72 of the electromagnetic generator 70 are arranged at an angle of approximately 90° to each other. Therefore, even in the control unit 50B that does not include the power generation detection circuit 54, the electromagnetic coupling between the speed regulation coil 46 and the power generation coil 72 can be weakened, and it is possible to avoid the electromagnetic noise generated from the power generation coil 72 during power generation from jumping into the speed regulation coil 46 and causing an erroneous detection of rotation.

[0042] [Third Embodiment] As shown in FIG. 11, the electronically controlled mechanical watch 1C of the third embodiment is provided with a rectification / speed regulation unit 47C connected to the speed regulation coil 46 in the movement 10C, and the rectification / speed regulation unit 47C is connected to the first power supply line 91 and the second power supply line 92. The control unit 50C includes an oscillation circuit 51, a rotation detection circuit 52, and a control circuit 53, and does not include a power generation detection circuit 54 or an overcharge prevention circuit 55, which is different from the first and second embodiments. As shown in FIG. 12, the rectification / speed regulation unit 47C includes a first switch 151, a second switch 152, and diodes 157 and 158. The first switch 151 is composed of P-channel field-effect transistors 153 and 154 connected between the first terminal MG11 of the speed control coil 46 and the first power line 91. The field-effect transistors 153 and 154 are connected in parallel with each other. The gate of the field-effect transistor 153 is connected to the second terminal MG12 of the speed control coil 46, and the gate of the field-effect transistor 154 is connected to the control circuit 53. The second switch 152 is composed of P-channel field-effect transistors 155 and 156 connected between the second terminal MG12 and the first power line 91. The field-effect transistors 155 and 156 are connected in parallel with each other. The gate of the field-effect transistor 155 is connected to the first terminal MG11, and the gate of the field-effect transistor 156 is connected to the control circuit 53. Therefore, the speed control coil 46, which is the first coil, is electrically connected to the power storage device 90 via the first switch 151, the second switch 152, and the diodes 157 and 158 of the rectification and speed control unit 47C.

[0043] Since the gates of the field-effect transistor 153 of the first switch 151 and the field-effect transistor 155 of the second switch 152 are connected to the second terminal MG12 and the first terminal MG11 respectively, when an induced electromotive force is generated in the speed control coil 46, among the field-effect transistors 153 and 155, the transistor connected to the low-potential side terminal of the speed control coil 46 is turned off, and the transistor connected to the high-potential side terminal is turned on. Chop control is executed by inputting the control signal P1 output from the control circuit 53 to the gates of the field-effect transistor 154 of the first switch 151 and the field-effect transistor 156 of the second switch 152, and at the same time, they are controlled to be in the on state or the off state. Therefore, the field-effect transistors 154 and 156 short-circuit the first terminal MG11 and the second terminal MG12 of the speed control coil 46.

[0044] Diodes 157 and 158 are arranged between the first terminal MG11 and the second terminal MG12 of the speed control coil 46 and the second power line 92. The diodes 157 and 158 may be any unidirectional elements that allow current to flow in one direction, regardless of their type. For example, a Schottky barrier diode or a silicon diode can be used.

[0045] As shown in FIG. 12, the rectifying and speed control unit 47C of the electronically controlled mechanical clock 1C is a full-wave rectifier circuit. Therefore, the speed control coil 46 can generate electricity by the rotation of the speed control rotor 42 and charge the power storage device 90. Further, after turning on the field effect transistors 154 and 156 by the control signal P1 to apply an electromagnetic brake, a chopped voltage is generated in the speed control coil 46 by chopping control that turns off the field effect transistors 154 and 156, and the power storage device 90 can be charged with this generated voltage. Therefore, the rectifying and speed control unit 47C functions as a charging circuit for the power storage device 90.

[0046] [Effects of the Third Embodiment] According to the electronically controlled mechanical clock 1C of the third embodiment, the same effects as those of the electronically controlled mechanical clock 1 of the first embodiment can be achieved. Further, since the rectifying and speed control unit 47C is provided instead of the speed control unit 47, in addition to the electrical energy generated by the electromagnetic generator 70, the electrical energy generated by the speed regulator 41 can also be used to charge the power storage device 90. That is, the speed regulator 41 can be used as both a speed regulator and a generator, enhancing the power generation ability of the electronically controlled mechanical clock 1C and shortening the time for charging the power storage device 90. Note that the control unit 50C of the electronically controlled mechanical clock 1C may also be provided with a power generation detection circuit 54 and an overcharge prevention circuit 55.

[0047] [Fourth Embodiment] As shown in FIGS. 13 and 14, the electronically controlled mechanical clock 1D of the fourth embodiment uses a dragonfly 7 instead of the rotating weight 12 to wind the mainspring 20 and generate electricity for the electromagnetic generator 70. For this reason, the same reference numerals are given to the same or corresponding components as those of the electronically controlled mechanical clock 1 of the first embodiment, and the description thereof is omitted or simplified. The movement 10D of the electronically controlled mechanical watch 1D is provided with a manual winding mechanism 11D for winding up the mainspring 20. The manual winding mechanism 11D is composed of a ratchet 7 and a winding wheel train 15D. As shown in FIG. 14, the winding wheel train 15D includes a winding stem 211, a barrel wheel 212, a click wheel 213, a round hole wheel 214, and a square hole intermediate wheel 215. When the ratchet 7 fixed to the winding stem 211 rotates, the square hole wheel 25 and the barrel arbor 22 rotate via the winding wheel train 15D, and the mainspring 20 is wound up.

[0048] The first wheel train 30D is configured to include a second wheel 32, a third wheel 33, a fourth wheel 34, a fifth wheel 35, and a sixth wheel 36, similar to the first wheel train 30. The speed regulator 41D of the speed regulating device 40D includes a speed regulating rotor 42 which is a first rotor, a rotor kana 43, a stator 45, a speed regulating coil 46 which is a first coil, and a magnetic core 48. Both ends of the magnetic core 48 around which the speed regulating coil 46 is wound are connected to the stator 45. The speed regulating rotor 42 rotates when the rotor kana 43 meshes with the sixth wheel 36. The second wheel train 60D includes a first transmission wheel 261 that meshes with the round hole wheel 214, a second transmission wheel 262 having a kana that meshes with the first transmission wheel 261, and a third transmission wheel 263 having a kana that meshes with the second transmission wheel 262. The electromagnetic generator 70D includes a magnetic core 71, a power generation coil 72 which is a second coil, a stator 73, a power generation rotor 74 which is a second rotor, and a rotor kana 75. The rotor kana 75 meshes with the third transmission wheel 263, and the power generation rotor 74 is rotated by the second wheel train 60D.

[0049] Note that the square-hole intermediate wheel 215 and the first transmission wheel 261 may be configured to rotate simultaneously by the round-hole wheel 214, but it is preferable to configure them such that one of the square-hole intermediate wheel 215 and the first transmission wheel 261 rotates selectively depending on the rotation direction of the round-hole wheel 214. That is, the square-hole intermediate wheel 215 transmits the rotation of the round-hole wheel 214 to the square-hole wheel 25 only when the round-hole wheel 214 rotates in the first direction, and the first transmission wheel 261 transmits the rotation of the round-hole wheel 214 to the second transmission wheel 262 only when the round-hole wheel 214 rotates in the second direction, which is the direction opposite to the first direction. Therefore, when the winding knob 7 is rotated in one direction, either clockwise or counterclockwise, at the 0-step position, the round-hole wheel 214, the square-hole intermediate wheel 215, and the square-hole wheel 25 rotate, and the mainspring 20 is wound up. Also, when the winding knob 7 is rotated in the other direction, either clockwise or counterclockwise, at the 0-step position, the round-hole wheel 214, the first transmission wheel 261, the second transmission wheel 262, the third transmission wheel 263, and the power generation rotor 74 rotate to generate power with the power generation coil 72. Note that the power generation rotor 74 uses a 6-pole rotor provided with three N poles and three S poles each, and can increase the power generation frequency and obtain a large electromotive voltage compared to the case of using a 2-pole rotor. Note that it may be configured such that power generation by the electromagnetic generator 70D and winding up of the mainspring 20 can be selected depending on the pulling-out position of the winding knob 7. For example, when the winding knob 7 is turned at the 0-step position, the power generation rotor 74 may be rotated through the second wheel train 60D to generate power, and when the winding knob 7 is turned at the 1-step position where it is pulled out by one step, the mainspring 20 may be wound up through the winding-up wheel train 15D.

[0050] [Effects of the Fourth Embodiment] According to the electronically controlled mechanical watch 1D of the fourth embodiment, since it includes the speed regulator 41D and the electromagnetic generator 70D, it can achieve the same effects as the electronically controlled mechanical watch 1 of the first embodiment. Also, by the user operating the winding knob 7, the mainspring 20 can be wound up and power can be generated by the electromagnetic generator 70D. Therefore, the user can surely wind up the mainspring 20 and generate power by operating the winding knob 7 without wearing the electronically controlled mechanical watch 1D.

[0051] [Modification Example] Note that the present invention is not limited to the above-described embodiments, and various modifications can be made within the scope of the gist of the present invention. In the first to third embodiments, the automatic winding mechanism 11 using the rotating weight 12 winds up the spring 20 and generates electricity with the electromagnetic generator 70. In the fourth embodiment, the manual winding mechanism 11D using the flywheel 7 winds up the spring 20 and generates electricity with the electromagnetic generator 70D. However, the winding mechanism of the spring 20 and the mechanism for generating electricity with the electromagnetic generators 70 and 70D are not limited to the configurations of the above-described embodiments. For example, the winding of the spring 20 may be performed by both the automatic winding mechanism 11 using the rotating weight 12 and the manual winding mechanism 11D using the flywheel 7, and the electromagnetic generator 70 may generate electricity using the rotating weight 12. Also, the winding of the spring 20 may be performed by both the automatic winding mechanism 11 using the rotating weight 12 and the manual winding mechanism 11D using the flywheel 7, and the electromagnetic generator 70 may generate electricity by manual operation using the flywheel 7.

[0052] Also in the third and fourth embodiments, a power generation detection circuit 54 may be provided to perform fixed brake control when power generation is detected. Further, in the fixed brake control of step S8, the chopper signal of the previous brake duty was used as the control signal P1 which is a fixed chopper signal, but a preset chopper signal of the brake duty may be used. For example, when a chopper signal with a brake duty of 80% is used for strong brake control and a chopper signal with a brake duty of 30% is used for weak brake control, a chopper signal with a brake duty of 55% may be used for fixed brake control. Note that the brake duty of the fixed chopper signal for fixed brake control is not limited to 55%, and may be 40%, 50%, etc., and may be appropriately set according to the movement.

[0053] The control circuit 53 used to select and output two types of chopper signals, one with a brake duty of 80% for strong brake control and the other with a brake duty of 30% for weak brake control. However, it may also select and output three or more types of chopper signals. For example, if the count value of the up-down counter in the control circuit 53 is "11", it outputs a chopper signal with a brake duty of 40%. If the count value is "10" or less, it outputs a chopper signal with a brake duty of 30%. If the count value is "12", it outputs a chopper signal with a brake duty of 70%. If the count value is "13" or more, it outputs a chopper signal with a brake duty of 80%.

[0054] The speed control device for controlling the speed of the first wheel train 30 is not limited to controlling the rotational speed of the speed control rotor 42 interlocked with the first wheel train 30 as in the above embodiments. For example, the first wheel train 30 may be applied to an electronically controlled mechanical clock that adjusts the speed using a gang gear, an ankle, and a templet, detects the vibration of the templet, and adjusts the operation of the templet based on the detected vibration. Specifically, a speed control rotor of a speed regulator may be attached to the templet of the templet, and the rotational speed of the rotor, that is, the rotational speed of the templet, may be accurately adjusted by chopping control of the speed control coil.

[0055] [Summary] The electronic control mechanical clock of the present disclosure includes a mainspring, a winding mechanism for winding up the mainspring, a first gear train for transmitting the mechanical energy of the mainspring, hands driven by the first gear train to display time, a speed regulating device for controlling the rotation speed of the first gear train, a control device for outputting a control signal for controlling the rotation speed to the speed regulating device, a power generation mechanism for generating electrical energy in conjunction with the winding mechanism, and a power storage device for storing the electrical energy generated by the power generation mechanism. The control device and the speed regulating device operate with the electrical energy stored in the power storage device. The speed regulating device includes a first rotor that rotates in conjunction with the first gear train, and a first coil that generates an electromagnetic force applied to the first rotor according to the control signal to control the rotation speed of the first gear train. The power generation mechanism is linked to the winding mechanism and includes a second gear train that speeds up the movement of the winding mechanism, a second rotor that rotates in conjunction with the second gear train, and a second coil that generates electrical energy by the rotation of the second rotor. According to the electronic control mechanical clock of the present disclosure, the power generation mechanism generates electrical energy by a second rotor that rotates via a second gear train that speeds up the movement of the winding mechanism. Since this power generation mechanism is provided in a separate system from the speed regulating device that regulates the first gear train driven by the mainspring wound up by the winding mechanism, the second rotor can rotate at a high speed compared to the case of providing a generator that is also used for power generation and speed regulation, and the power generation capacity can be increased. Therefore, there is no need to increase the size of the second coil of the power generation mechanism. Also, the first coil of the speed regulating device is also provided for speed regulation and there is no need to increase the number of turns for power generation, so there is no need to increase the size of the first coil either. Therefore, there is no need to increase the size of the first coil and the second coil respectively, and the degree of freedom in component layout can be increased. In addition, since the power generation capacity of the power generation mechanism can be increased, the drive voltage of the IC constituting the control unit can also be made relatively high. For this reason, there is no need to use a high-cost IC manufactured by a special low-power consumption process as a component such as an IC, and a low-cost IC or the like manufactured by a general-purpose process can be used.

[0056] In the electronically controlled mechanical timepiece of the present disclosure, the speed regulating device controls the rotational speed of the first rotor to a first rotational speed, and a second rotational speed, which is the rotational speed of the second rotor during the winding operation by the winding mechanism, is preferably higher than the first rotational speed. According to the electronically controlled mechanical timepiece of the present disclosure, since the second rotational speed, which is the rotational speed of the second rotor, is higher than the first rotational speed, which is the rotational speed of the first rotor, the power generation ability of the second coil can be improved. That is, the first rotational speed is set to, for example, 6 Hz or 8 Hz or the like in order to drive the hands driven by the first wheel train at a predetermined reference speed. On the other hand, since there are no restrictions such as speed regulation for the second rotational speed, it can be set to, for example, 100 Hz or the like, which is several tens of times the first rotational speed, and the power generation ability of the power generation mechanism can be enhanced.

[0057] In the electronically controlled mechanical timepiece of the present disclosure, the winding mechanism may include a rotating weight and a winding wheel train that transmits the rotation of the rotating weight. According to the electronically controlled mechanical timepiece of the present disclosure, since a winding mechanism including a rotating weight and a winding wheel train is used, by rotating the rotating weight by wearing the electronically controlled mechanical timepiece on the wrist and shaking it, etc., the mainspring can be wound and power can be generated by the power generation mechanism automatically, improving convenience.

[0058] In the electronically controlled mechanical timepiece of the present disclosure, the winding mechanism may include a crown and a winding wheel train that transmits the rotation of the crown. According to the electronically controlled mechanical timepiece of the present disclosure, since a winding mechanism including a crown and a winding wheel train is used, by turning the crown by manual operation of the user, the mainspring can be wound and power can be generated by the power generation mechanism. Therefore, before wearing and using the electronically controlled mechanical timepiece on the wrist, the user can also surely wind the mainspring and generate power by operating the crown.

[0059] In the electronically controlled mechanical timepiece of the present disclosure, a power generation detection circuit for detecting the power generation state of the power generation mechanism is provided, and it is preferable that the speed control device executes a process of stopping the control of the rotation speed while power generation is detected by the power generation detection circuit. According to the electronically controlled mechanical timepiece of the present disclosure, while power generation is detected by the power generation detection circuit, the speed control device stops the control of the rotation speed, so that it is possible to prevent false detection in which noise during power generation is regarded as rotation detection.

[0060] In the electronically controlled mechanical timepiece of the present disclosure, the control signal is generated based on a comparison result of comparing a rotation detection signal based on the electromotive force waveform of the first coil with a reference signal, and is a chopper signal whose pulse width is variably controlled. The process of stopping the control of the rotation speed preferably outputs a fixed chopper signal in which the variable control is stopped as the control signal. According to the electronically controlled mechanical timepiece of the present disclosure, while power generation is detected by the power generation detection circuit, since a fixed chopper signal is output as the control signal, the rotation speed of the first rotor can be appropriately controlled.

[0061] In the electronically controlled mechanical timepiece of the present disclosure, the pulse width of the fixed chopper signal may be set to the pulse width immediately before the control of the rotation speed is stopped. According to the electronically controlled mechanical timepiece of the present disclosure, since the pulse width of the fixed chopper signal is set to the pulse width immediately before, the speed control immediately before the detection of the power generation state can be continued, and the rotation speed of the first rotor can be appropriately controlled.

[0062] In the electronically controlled mechanical timepiece of the present disclosure, the pulse width of the fixed chopper signal may be set to a preset fixed pulse width. According to the electronically controlled mechanical timepiece of the present disclosure, since the pulse width of the fixed chopper signal is set to a preset fixed pulse width, the average speed control can be continued even during the detection of the power generation state, and the rotation speed of the first rotor can be appropriately controlled.

[0063] In the electronically controlled mechanical timepiece of the present disclosure, the first coil is electrically connected to the power storage device, and the speed regulating device boosts the electrical energy generated in the first coil by chopping control that shorts the terminals of the first coil based on the control signal to charge the power storage device, and preferably includes a charging circuit that controls the rotational speed of the first wheel train via the first coil. According to the electronically controlled mechanical timepiece of the present disclosure, since the speed regulating device includes a charging circuit, it is possible to generate electricity with both the power generation mechanism and the charging circuit of the speed regulating device to charge the power storage device. Therefore, the power generation ability in the electronically controlled mechanical timepiece can be enhanced, and the time required to charge the power storage device can also be shortened.

Explanation of Signs

[0064] 1... Electronically controlled mechanical timepiece, 1B... Electronically controlled mechanical timepiece, 1C... Electronically controlled mechanical timepiece, 1D... Electronically controlled mechanical timepiece, 3... Dial, 4... Hour hand, 5... Minute hand, 6... Second hand, 7... Balance wheel, 10... Movement, 10B... Movement, 11... Automatic winding mechanism, 11D... Manual winding mechanism, 12... Rotating weight, 15... Winding wheel train, 15D... Winding wheel train, 20... Mainspring, 30... First wheel train, 30D... First wheel train, 40... Speed regulating device, 40D... Speed regulating device, 41... Regulator, 41D... Regulator, 42... Speed regulating rotor, 43... Rotor kana, 46... Speed regulating coil, 47... Speed regulating section, 47C... Speed regulating section, 50... Control section, 50B... Control section, 50C... Control section, 51... Oscillation circuit, 52... Rotation detection circuit, 53... Control circuit, 54... Power generation detection circuit, 55... Overcharge prevention circuit, 60... Second wheel train, 60D... Second wheel train, 70... Electromagnetic generator, 70D... Electromagnetic generator, 72... Power generation coil, 74... Power generation rotor, 75... Rotor kana, 80... Rectifier circuit, 90... Power storage device, 93... Voltage detection section, 95... Crystal oscillator.

Claims

1. A mainspring, a winding mechanism for winding up the mainspring, a first wheel train for transmitting the mechanical energy of the mainspring, a pointer driven by the first wheel train to indicate time, a speed control device for controlling the rotation speed of the first wheel train, a control device for outputting a control signal for controlling the rotation speed to the speed control device, a power generation mechanism for generating electrical energy in conjunction with the winding mechanism, and a power storage device for storing the electrical energy generated by the power generation mechanism, wherein the control device and the speed control device operate with the electrical energy stored in the power storage device, the speed control device includes a first rotor that rotates in conjunction with the first wheel train, and a first coil that generates an electromagnetic force applied to the first rotor according to the control signal to control the rotation speed of the first wheel train, the power generation mechanism includes a second wheel train that is interlocked with the winding mechanism and increases the movement speed of the winding mechanism, a second rotor that rotates in conjunction with the second wheel train, and a second coil that generates electrical energy by the rotation of the second rotor, characterized in that it is an electronically controlled mechanical timepiece.

2. In the electronically controlled mechanical timepiece according to Claim 1, the speed control device controls the rotation speed of the first rotor to a first rotation speed, and a second rotation speed, which is the rotation speed of the second rotor during the winding operation by the winding mechanism, is higher than the first rotation speed. characterized in that it is an electronically controlled mechanical timepiece.

3. In the electronically controlled mechanical timepiece according to Claim 1, the winding mechanism includes a rotating weight and a winding wheel train for transmitting the rotation of the rotating weight. characterized in that it is an electronically controlled mechanical timepiece.

4. In the electronically controlled mechanical timepiece according to Claim 1, the winding mechanism includes a fusee and a winding wheel train for transmitting the rotation of the fusee. characterized in that it is an electronically controlled mechanical timepiece.

5. In the electronically controlled mechanical timepiece according to Claim 1, it includes a power generation detection circuit for detecting the power generation state of the power generation mechanism, and the speed control device executes a process of stopping the control of the rotation speed while power generation is detected by the power generation detection circuit. characterized in that it is an electronically controlled mechanical timepiece.

6. In the electronically controlled mechanical timepiece according to Claim 5, The control signal is a chopper signal generated based on a comparison result of comparing a rotation detection signal based on the electromotive force waveform of the first coil with a reference signal, and having a pulse width variably controlled. The process of stopping the control of the rotation speed is to output a fixed chopper signal with variable control stopped as the control signal characterizing an electronically controlled mechanical timepiece.

7. In the electronically controlled mechanical timepiece according to claim 6, the pulse width of the fixed chopper signal is set to the pulse width immediately before stopping the control of the rotation speed characterizing an electronically controlled mechanical timepiece.

8. In the electronically controlled mechanical timepiece according to claim 6, the pulse width of the fixed chopper signal is set to a preset fixed pulse width characterizing an electronically controlled mechanical timepiece.

9. In the electronically controlled mechanical timepiece according to claim 1, the first coil is electrically connected to the power storage device, the speed regulating device is equipped with a charging circuit that boosts the electrical energy generated in the first coil by chopping control that shorts the terminals of the first coil based on the control signal and charges the power storage device, and controls the rotation speed of the first wheel train via the first coil characterizing an electronically controlled mechanical timepiece.

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