Electronically controlled mechanical timepiece

Abstract

An electronically controlled mechanical timepiece can improve power generation capability and can improve the degree of freedom of layout of a generator and other components. An electronically controlled mechanical timepiece has: a spring wound by a winding mechanism; a first gear train; a pointer; the speed regulating device is used for controlling the rotating speed of the first gear train; the control device outputs a control signal to the speed regulation device; a power generation mechanism that generates electric energy in conjunction with the winding mechanism; and an electrical storage device. The control device and the speed regulation device are operated by using electric energy stored in the electricity storage device, and the speed regulation device is provided with: 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 in accordance with the control signal to control the rotational speed of the first gear train. The power generation mechanism is provided with: a second gear train which is linked with the winding mechanism and accelerates the operation of the winding mechanism; a second rotor that rotates in conjunction with the second gear train; and a second coil that generates electric energy by rotation of the second rotor.

Description

Technical Field

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

[0002] An electronically controlled mechanical timepiece is known, which controls a generator that generates an induced voltage through a gear train and is driven by a mainspring, a pointer coupled to the gear train, and the rotation period of the generator, thereby regulating the movement speed of the pointer coupled to the gear train (for example, see Patent Document 1).

[0003] In this electronically controlled mechanical timepiece, a switch is provided to short-circuit the two ends of the coil of the generator, and chopper control is performed to turn the switch on and off. Thus, when the switch is turned on, in addition to the speed control based on the short-circuit brake, energy can be stored in the coil of the generator, and when the switch is turned off, the electromotive force can be increased because the energy stored in the coil is included.

[0004] Patent Document 1: Japanese Patent Application Publication No. 2000-201483

[0005] In order to improve the power generation capacity, it is considered to make the rotor contained in the generator rotate at high speed, but in the previous electronically controlled mechanical clocks, the speed control based on chopper control and the processing of increasing the electromotive force are performed simultaneously, and the rotor cannot be rotated at high speed. In addition, the power generation capacity can also be improved by increasing the inductance value of the coil, but this requires increasing the number of turns of the coil. As the coil becomes larger, the generator becomes larger. When the generator is configured in the movement, there is a problem of reduced freedom in the layout of the generator and other components. SUMMARY OF THE INVENTION

[0006] The electronically controlled mechanical timepiece disclosed in the present invention comprises: a mainspring; a winding mechanism for winding the mainspring; a first wheel train for transmitting the mechanical energy of the mainspring; a pointer for being driven by the first wheel train to display the time; a speed regulating 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 regulating device; a power generation mechanism for generating electric energy in conjunction with the winding mechanism; and a power storage device for storing the electric energy generated by the power generation mechanism, the control device and the speed regulating device are operated using the electric energy stored in the power storage device, the speed regulating device comprises: a first rotor for rotating in conjunction with the first wheel train; and a first coil for generating an electromagnetic force applied to the first rotor in accordance with the control signal to control the rotation speed of the first wheel train, the power generation mechanism comprises: a second wheel train for accelerating the movement of the winding mechanism in conjunction with the winding mechanism; a second rotor for rotating in conjunction with the second wheel train; and a second coil for generating the electric energy by the rotation of the second rotor. Drawings

[0007] Figure 1 is a front view showing an electronically controlled mechanical watch of the first embodiment.

[0008] Figure 2 is a block diagram showing the structure of an electronically controlled mechanical watch of the first embodiment.

[0009] Figure 3 is an exploded perspective view showing the main part of the movement of an electronically controlled mechanical watch of the first embodiment.

[0010] Figure 4 is a diagram showing the circuit structure of the movement of the first embodiment.

[0011] Figure 5 is a circuit diagram showing the speed control section of the first embodiment.

[0012] Figure 6 is a waveform diagram showing the control signal of the first embodiment.

[0013] Figure 7 is a flowchart showing the speed control method of the first embodiment.

[0014] Figure 8 is a waveform diagram showing the relationship between the coil voltage, rotation detection signal, reference signal, power generation detection signal, and control signal of the first embodiment.

[0015] Figure 9 is a block diagram showing the structure of an electronically controlled mechanical watch of the second embodiment.

[0016] Figure 10 is a flowchart showing the speed control method of the second embodiment.

[0017] Figure 11 is a block diagram showing the structure of an electronically controlled mechanical watch of the third embodiment.

[0018] Figure 12 is a circuit diagram showing the rectification / speed control section of the third embodiment.

[0019] Figure 13 is a block diagram showing the structure of an electronically controlled mechanical watch of the fourth embodiment.

[0020] Figure 14 is a schematic top view showing the main part of the movement of an electronically controlled mechanical watch of the fourth embodiment.

[0021] Reference Numeral Explanation

[0022] 1: Electronically controlled mechanical clock; 1B: Electronically controlled mechanical clock; 1C: Electronically controlled mechanical clock; 1D: Electronically controlled mechanical clock; 3: Dial; 4: Hour hand; 5: Minute hand; 6: Second hand; 7: Stem; 10: Movement; 10B: Movement; 11: Automatic winding mechanism; 11D: Manual winding mechanism; 12: Pendulum; 15: Winding train; 15D: Winding train; 20: Mainspring; 30: First wheel train; 30D: First wheel train; 40: Speed control device; 40D: Speed control device; 41: Governor; 41D: Governor; 42: Speed control rotor; 43: Pinion of rotor; 46: Speed control coil; 47: Speed control section; 47C: Speed control 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: Pinion of rotor; 80: Rectifier circuit; 90: Energy storage device; 93: Voltage detection section; 95: Quartz oscillator. Detailed implementation mode

[0023] [First implementation mode]

[0024] Hereinafter, the electronically controlled mechanical clock 1 of the first implementation mode will be described with reference to the drawings.

[0025] As Figure 1 shown, the electronically controlled mechanical clock 1 has a case 2, a dial 3, an hour hand 4 as a pointer, a minute hand 5, a second hand 6, a stem 7, and a date wheel 8.

[0026] As Figure 2 shown, the electronically controlled mechanical clock 1 has a movement 10. The movement 10 has an automatic winding mechanism 11, a mainspring 20, a first wheel train 30, a speed control device 40, a control section 50, a second wheel train 60, an electromagnetic generator 70, a rectifier circuit 80, an energy storage device 90, and a quartz oscillator 95.

[0027] [Winding mechanism]

[0028] As Figure 3 shown, the automatic winding mechanism 11 has a pendulum 12 and a winding train 15.

[0029] The pendulum 12 is rotatably provided on the movement 10 through a rotating shaft 13 formed by a bearing. A pendulum pinion 14 is integrally provided on the pendulum 12.

[0030] The winding train 15 has an eccentric wheel 16, a pawl lever 17, and a transmission wheel 18.

[0031] The eccentric wheel 16 has an eccentric shaft member 161 and an eccentric gear 162 mounted on the eccentric shaft member 161. The eccentric shaft member 161 has an eccentric portion that is eccentric with respect to the rotation axis of the eccentric gear 162, and the ratchet lever 17 is rotatably mounted on the eccentric portion.

[0032] The eccentric gear 162 meshes with the pendulum pinion 14 and rotates in conjunction with the pendulum 12. As a result, the eccentric portion of the eccentric shaft member 161 revolves around the rotation axis of the eccentric gear 162, so that the ratchet lever 17 installed on the eccentric portion moves forward and backward in the direction of approaching and moving away from the transmission wheel 18.

[0033] The ratchet lever 17 has a pull-pawl lever portion 171 and a push-pawl lever portion 172 for clamping the transmission gear 181 of the transmission wheel 18 when viewed from above.

[0034] The transmission wheel 18 has a transmission gear 181 and a transmission pinion 182. The pull claw of the pull claw rod 171 and the push claw of the push claw rod 172 engage with the transmission gear 181, and the transmission wheel 18 rotates in one direction in conjunction with the forward and backward movement of the pawl rod 17. The rotation of the transmission wheel 18 is transmitted to the large steel wheel 25 described later, and the mainspring 20 is wound by the rotation of the large steel wheel 25.

[0035] [Clockwork]

[0036] Spring 20 is stored in Figure 3 Inside the barrel wheel 21 shown. The barrel wheel 21 has a barrel arbor 22, a barrel gear 23, and a barrel cover 24. The outer end of the mainspring 20 is fixed to the barrel gear 23, and the inner end is fixed to the barrel arbor 22. The barrel arbor 22 rotates integrally with the large steel wheel 25. The large steel wheel 25 is meshed with the transmission pinion 182, and the rotation of the pendulum 12 is transmitted by the pendulum pinion 14, the eccentric wheel 16, the ratchet lever 17, and the transmission wheel 18, so that the large steel wheel 25 rotates. The large steel wheel 25 rotates, and the barrel arbor 22 rotates, so that the mainspring 20 is wound. Therefore, the mainspring 20 is wound by the automatic winding mechanism 11 having the pendulum 12 and the winding wheel train 15. According to the automatic winding mechanism 11, for example, when the user swings his wrist while wearing the electronically controlled mechanical timepiece 1 on his wrist, the pendulum 12 rotates, thereby automatically winding the mainspring 20.

[0037] [First wheel system]

[0038] If Figure 3 ​​As shown, 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 pinion of the second gear 32 meshes with the barrel gear 23, and the pinion of the third gear 33 meshes with the second gear 32. The pinion of the fourth gear 34 coaxially arranged with the second gear 32 meshes with the third gear 33, and the pinion of the fifth gear 35 meshes with the fourth gear 34. The pinion of the sixth gear 36 meshes with the fifth gear 35, and the rotor pinion 43 of the speed-regulating rotor 42 provided in the speed-regulating device 40 meshes with the sixth gear 36. Therefore, the rotation of the barrel gear 23 rotationally driven by the unwinding of the mainspring 20 is speeded up by the first gear train 30 and transmitted to the speed-regulating rotor 42.

[0039] The second hand 6 is mounted on the shaft of the fourth gear 34. The minute hand 5 is mounted on the minute wheel 37 that rotates integrally with the second gear 32. The hour hand 4 is mounted on the hour wheel 38, and the hour wheel 38 rotates on the minute wheel 37 via an intermediate wheel (not shown).

[0040] [Speed-Regulating Device]

[0041] The speed-regulating device 40 has Figure 3 the speed regulator 41 as shown. The speed regulator 41 has a speed-regulating rotor 42 as the first rotor, a rotor pinion 43, a rotor inertia plate 44, a stator 45, and a speed-regulating coil 46 as the first coil. The speed-regulating rotor 42 is magnetized into two poles, and the rotor pinion 43 meshes with the sixth gear 36, so that the speed-regulating rotor 42 rotates together with the rotor pinion 43. The rotor inertia plate 44 stabilizes the rotation of the speed-regulating rotor 42.

[0042] In the present embodiment, two stators 45 are provided, and an opening for arranging the speed-regulating rotor 42 is formed at one end side of each stator 45. In addition, the speed-regulating coil 46 is wound around one of the two stators 45. In addition, as the speed regulator 41, the speed-regulating coil 46 can also be wound around the two stators 45. In addition, similar to the electromagnetic generator 70 described later, a speed regulator can be formed by connecting a stator having an opening for arranging the rotor to a magnetic core around which the speed-regulating coil is wound.

[0043] [Second Gear Train and Electromagnetic Generator]

[0044] As Figure 3As shown, the electromagnetic generator 70 includes a magnetic core 71, a second coil wound around the magnetic core 71, i.e., a power generation coil 72, a stator 73 connected to both ends of the magnetic core 71, a second rotor disposed in the opening of the stator 73 and magnetized into two poles, i.e., a power generation rotor 74, and a pinion gear 75 integrally formed with the power generation rotor 74. Here, when observing the electronic control type mechanical watch 1 from the front side in a top view, the power generation coil 72 and the speed control coil 46 are arranged at an angle of approximately 90° to each other. That is, the cross angle between the length direction of the magnetic core 71 around which the power generation coil 72 is wound and the length direction of the stator 45 around which the speed control coil 46 is wound is approximately 90°.

[0045] The second gear train 60 transmits the rotation of the pendulum 12 to rotate the power generation rotor 74 as the second rotor, and includes a gear 61 meshing with the pinion gear 75 of the rotor and a pinion gear 62 meshing with the pinion gear 14 of the pendulum. In addition, the second gear train 60 may be composed of a combination of multiple gears, as long as it can increase the speed of the rotation of the pendulum 12 and transmit it to the power generation rotor 74.

[0046] When the pendulum 12 rotates, the power generation rotor 74 is rotated via, for example, a speed increasing gear train with a speed increase ratio of 100 times, i.e., the second gear train 60. Thus, the second rotational speed of the power generation rotor 74 as the second rotor can be, for example, as high as about 100 Hz. The induced electromotive force generated in the power generation coil 72 is represented by the following mathematical formula 1. When the power generation rotor 74 rotates at a high speed, the change amount of the magnetic flux becomes larger, and a larger electromotive force can be obtained. In addition, in mathematical formula 1, e is the induced electromotive force, N is the number of turns of the coil, is the change amount of the magnetic flux, and dt is the change time of the magnetic flux.

[0047] [Mathematical formula 1]

[0048]

[0049] Figure 4 is a diagram showing the circuit structure of the movement 10. The movement 10 includes: a speed control coil 46 as the first coil; a power generation coil 72 as the second coil; a rectifying circuit 80 connected to the power generation coil 72 to rectify 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 to control the speed of the speed control rotor 42 as the first rotor; a control unit 50 as a control device; a power storage device 90; a voltage detection unit 93; and a quartz 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.

[0050] In addition, the control unit 50, the rectifier circuit 80, the power storage device 90, the voltage detection unit 93 are connected to the first power supply line 91 and the second power supply line 92. In the present embodiment, the potential of the first power supply line 91 is VDD, and the potential of the second power supply line 92 is VSS.

[0051] The rectifier circuit 80 is a circuit that rectifies the alternating current generated by the power generation coil 72 of the electromagnetic generator 70 into direct current, and various rectifier circuits such as boost rectification, full-wave rectification, half-wave rectification, and transistor rectification can be used.

[0052] The power storage device 90 stores the electric energy generated by the power generation coil 72 of the electromagnetic generator 70 and rectified by the rectifier circuit 80. The electric energy stored in the power storage device 90 is supplied to the control unit 50. The consumption current of the control unit 50 is about 50 nA. Therefore, the power storage device 90 can 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 less battery degradation, so long-term reliability can also be ensured. In addition, the power storage device 90 is not limited to the all-solid-state battery, and can also be composed of a secondary battery, a capacitor, etc.

[0053] The voltage detection unit 93 detects the voltage of the power storage device 90 and outputs the detection result to the control unit 50.

[0054] The quartz oscillator 95 is oscillated by the oscillation circuit 51 of the control unit 50 and outputs a clock signal with a specified frequency. In addition, the oscillator that outputs the clock signal is not limited to the quartz oscillator 95, and can also be a silicon-based MEMS oscillator. MEMS is the abbreviation of Micro ElectroMechanical Systems. In the case of using a MEMS oscillator, the accuracy is worse than that of the quartz oscillator 95, but miniaturization can be achieved.

[0055] The oscillation circuit 51 oscillates the quartz oscillator 95, divides the oscillation signal, and outputs a reference clock Fs with a specified frequency to the control circuit 53. The frequency of the reference clock is set according to the rotation period of the speed governor rotor 42 of the speed governor 41 linked to the running speed of the pointer, that is, the first rotation speed. For example, when the rotation period (first rotation speed) of the speed governor rotor 42 provided in the first gear train 30 for the pointers to run accurately 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 governor 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 as the second rotor is about 100 Hz, which is higher than the first rotation speed.

[0056] The rotation detection circuit 52 is a circuit that detects the rotation period of the speed control rotor 42, and is composed of, for example, 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 force 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 force waveform of the speed control coil 46, which is the first coil.

[0057] The control circuit 53 outputs a control signal P1 to the speed control unit 47. The control signal P1 is a chopper signal whose pulse width is variably controlled and is 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. The processing of the control circuit 53 will be described later.

[0058] The power generation detection circuit 54 detects the power generation voltage of the electromagnetic generator 70, and is composed of, for example, a comparator that is connected to the rectifier circuit 80 and compares the power generation voltage with a threshold voltage. The power generation detection circuit 54 in this embodiment outputs an L-level signal to the control circuit 53 during the period when power generation is not detected, and outputs an H-level signal to the control circuit 53 during the period when power generation is detected.

[0059] 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 on 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.

[0060] [Speed control unit]

[0061] As Figure 5 shown, the speed control unit 47 is a half-wave rectifier circuit, and shorts the speed control coil 46 of the speed governor 41 through chopping to control the rotational speed of the speed control rotor 42, that is, the first gear train 30, via the speed control coil 46.

[0062] 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 this embodiment, the potential of the first power supply line 474 is VDD1, and the potential of the second power supply line 475 is VSS1. In addition, the potential VDD1 can be the same as the potential VDD or a different potential. Similarly, the potential VSS1 can be the same as the potential VSS or a different potential.

[0063] The first terminal MG1 of the speed control coil 46 is connected to the first power supply line 474.

[0064] 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 for cutting off and connecting 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.

[0065] The diode 472 is arranged between the second terminal MG2 of the speed control coil 46 and the second power supply 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.

[0066] In the above speed control unit 47, when the speed control rotor 42 of the speed control device 40 rotates via the first gear train 30 due to the mechanical energy stored in the mainspring 20, an induced voltage is generated in the speed control coil 46.

[0067] At this time, when the field effect transistor 471 is in the cut-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 from the first terminal MG1 through the path of the first power supply line 474, the boost capacitor 473, the second power supply line 475, the diode 472, and the second terminal MG2, and charges are stored in the boost capacitor 473.

[0068] The speed control unit 47 performs chopper control by a chopper signal from the control circuit 53, that is, a control signal P1. The chopper control is as follows: According to the control signal P1 output from the control circuit 53, the field effect transistor 471 is turned on and off at a frequency higher than the rotation of the speed control rotor 42. Through this control, the short-circuiting and opening of both ends of the speed control coil 46 are repeated. During the period when the field effect transistor 471 is turned on, both ends of the speed control coil 46 are short-circuited and become in a short-circuit state, so a large current flows inside the speed control coil 46. Then, 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 to generate a high induced voltage.

[0069] In addition, the control of turning on and off both ends of the speed control coil 46 by chopper control is associated with the speed control of the speed control rotor 42. Figure 6 The control signal P1 showing the braking signal waveform as chopper control is shown. When the control signal P1 is at the L level, the field effect transistor 471 becomes in the on state, and when the control signal P1 is at the H level, the field effect transistor 471 becomes in the cut-off state. Therefore, the period during which the control signal P1 is at the L level is the braking period, and the ratio of the braking period to one cycle of the control signal P1 is defined as the duty ratio or the braking duty ratio. That is, the braking duty ratio refers to the ratio of the braking period to the cycle of the control signal P1. For example,Figure 6 The chopping period of the control signal P1 is 256 Hz. The signal waveform of the first half is a forced braking waveform with an L level applied for 80% of the period, that is, a braking duty ratio of 80%. The signal waveform of the second half of the control signal P1 is a weak braking waveform with an L level applied for 30% of the period, that is, a braking duty ratio of 30%.

[0070] 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 regulation coil 46 are short-circuited to form a closed loop. Thus, an electromagnetic force is generated by the current flowing through the speed regulation coil 46, and a braking force acts on the speed regulation rotor 42. That is, a short-circuit braking is applied to the speed governor 41, and energy is stored in the speed regulation coil 46.

[0071] 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 governor 41 operates to generate electricity including the amount of energy stored in the speed regulation coil 46 during the short-circuit braking, so the electromotive force increases.

[0072] Next, with reference to Figure 7 the flowchart of, the speed regulation control of the control unit 50 will be described.

[0073] 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 specified value. During the period when the control unit 50 determines "no" in step S1, step S1 is continued. That is, this is because when the charging voltage of the power storage device 90 is less than the specified voltage, the quartz oscillator 95 may stop oscillating and stable control cannot be performed.

[0074] When the charging voltage detected by the voltage detection unit 93 becomes equal to or higher than the specified voltage and the control unit 50 determines "yes" in step S1, the control unit 50 executes the power generation detection process based on the power generation detection circuit 54, that is, step S2. Next, through the power generation detection process of step S2, the control unit 50 executes step S3 of determining whether power generation is detected.

[0075] When the control unit 50 determines "no" in step S3, it executes the rotation detection process based on the rotation detection circuit 52, that is, step S4. As described above, when the coil voltage generated in the speed regulation coil 46 exceeds the detection threshold, the rotation detection circuit 52 determines that the rotation of the speed regulation rotor 42 is detected, and changes the rotation detection signal FG1 from the H level to the L level.

[0076] Next, the control unit 50 executes step S5 of comparing the reference clock Fs input from the oscillation circuit 51 with the rotation detection result of the speed regulation rotor 42 input from the rotation detection circuit 52, that is, the rotation detection signal FG1.

[0077] In addition, in the present embodiment, the control circuit 53 has a reversible counter. The rotation detection signal FG1 is input to the forward counting input of the reversible counter, and the reference clock Fs is input to the reverse counting input. The reversible counter is, for example, a 4-bit counter, and is initialized to the initial count value "11" at the time of system reset or power-on. And when the rotation detection signal FG1 changes from the H level to the L level, the count value of the reversible 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 reversible counter is decremented by 1. When the count value of the reversible counter is greater than the initial count value "11", the control circuit 53 determines as "early" in step S5, and when the count value of the reversible counter is equal to or less than the initial count value "11", it determines as "late" in step S5.

[0078] When it is detected in step S5 that the rotation of the speed control rotor 42 is early, the control unit 50 executes the forced braking control in step S6. In addition, when it is detected in step S5 that the rotation of the speed control rotor 42 is late, the control unit 50 executes the weak braking control in step S7.

[0079] During the forced braking control in step S6, the control circuit 53 outputs a control signal P1 with a braking duty ratio of 80%. Therefore, the braking on-time in the reference period becomes longer, and the speed governor 41 is forced to brake. However, in order to turn off the braking at a constant period, chopper control is performed, and the braking torque can be increased while ensuring the induced voltage.

[0080] During the weak braking control in step S7, the control circuit 53 outputs a control signal P1 with a braking duty ratio of 30%. Therefore, the braking on-time in the reference period becomes shorter, and almost no braking is applied to the speed governor 41, that is, weak braking control is performed.

[0081] Then, after the control unit 50 executes the braking control in step S6 or step S7, it returns to step S1 and continues the control.

[0082] In addition, when it is determined as "yes" in step S3, the control unit 50 executes the fixed braking control in step S8. During the fixed braking control in step S8, the control circuit 53 continues to transfer to the braking control immediately before the fixed braking control. That is, when the immediately preceding braking control is the forced braking control in step S6, the control circuit 53 outputs a control signal P1 with a braking duty ratio of 80% as the fixed chopping signal during the fixed braking control in step S8. In addition, when the immediately preceding braking control is the weak braking control in step S7, the control circuit 53 outputs a control signal P1 with a braking duty ratio of 30% as the fixed chopping signal during the fixed braking control in step S8.

[0083] Then, after the control unit 50 executes the fixed braking control in step S8, it returns to step S1 and continues the control.

[0084] In addition, the power generation of the electromagnetic generator 70 occurs only when the pendulum 12 rotates by moving the wrist wearing the electronically controlled mechanical watch 1. Therefore, during the operation of the electronically controlled mechanical watch 1, the time without power generation is longer than the time with power generation. Also, in a quartz watch that performs speed control based on a reference signal output from a quartz oscillator 95, the main cause of the change in the accuracy of the watch is the deviation of the reference signal caused by temperature change. A general tuning fork type quartz oscillator 95 has a temperature characteristic curve of a quadratic curve with approximately 25°C as the vertex. The temperature inside the watch in the state of being worn on the user's wrist is near 25°C and hardly changes. Therefore, the accuracy is stable, and even if the speed control is stopped and the fixed braking control is performed during carrying, there are almost no problems with accuracy.

[0085] Figure 8 FIG. is a waveform diagram showing each signal and the induced voltage of the speed control coil 46 when the control unit 50 performs speed control. When the speed control rotor 42 rotates via the first gear train 30 by the torque from the mainspring 20, an induced voltage, i.e., a coil voltage, is generated in the speed control coil 46 in association with this rotation. This coil voltage gradually increases as the speed control rotor 42 rotates and then gradually decreases. In addition, a control signal P1 is output from the control circuit 53 to the field effect transistor 471 of the speed control unit 47. At the moment 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 the two ends of the speed control coil 46 are disconnected from the short-circuited state, the electromotive force generated by the self-inductance effect is added to the induced voltage, generating a larger electromotive force.

[0086] The rotation detection circuit 52 makes the rotation detection signal FG1 output to the control circuit 53 be at the H level when it detects that the terminal voltage of the speed control coil 46, i.e., the coil voltage, is less than a preset detection threshold, and makes the rotation detection signal FG1 be at the L level when it detects that the coil voltage is above the detection threshold. Therefore, the control circuit 53 can detect the rotation of the speed control rotor 42 through the change of the rotation detection signal FG1 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 fixed frequency, for example, 6 Hz.

[0087] Therefore, as described above, at the timing when the rotation detection signal FG1 changes from the H level to the L level and the timing when the reference clock Fs changes from the H level to the L level, the count value of the reversible counter changes. Thus, the control circuit 53 can determine whether the rotation of the speed control rotor 42, that is, whether the hour hand 4, minute hand 5, and second hand 6 that move the hands via the first gear train 30 are delayed or advanced. Figure 8In the example, at the timing when the rotation detection signal FG1 changes from the H level to the L level, the count value of the reversible counter becomes "12," and at the timing when the reference clock Fs changes from the H level to the L level, the count value of the reversible counter becomes "11." Therefore, during period T2, the forced braking control of step S6 is executed, and during the periods T1 and T3 before and after that, the weak braking control of step S7 is executed.

[0088] In addition, during the period when power generation is detected by the power generation detection circuit 54 and the power generation detection signal becomes the H level, the fixed braking control of step S8 is executed. In Figure 8 , since power generation is detected in the middle of period T3 during the weak braking control, the control circuit 53 continues to output the control signal P1 for the previous weak braking control as the fixed braking control.

[0089] The next period T4 is the same as period T2, during which the count value of the reversible counter is "12," and the rotation of the speed control rotor 42 is advanced. However, since power generation is detected, the control circuit 53 continues the fixed braking control.

[0090] In the next period T5, the count value of the reversible counter is "11." At the beginning of this period T5, since power generation is detected, the output of the control signal P1 for the previous weak braking control is continued as the fixed braking control. Then, power generation is no longer detected in the middle of period T5, and it is determined as "No" in step S3. Therefore, the normal rotation control after step S4 is performed. In Figure 8 , the count value of the reversible counter in period T5 is "11," and it is determined as "delayed" in step S5. Therefore, the weak braking control of step S7 is performed.

[0091] In addition, during the period when the rotation of the speed control rotor 42 is advanced, that is, during the period when the count value of the reversible counter is 12 or more, when the power generation detection signal changes from the H level to the L level, that is, when power generation is no longer detected, it is determined as "advanced" in step S5. Therefore, the forced braking control of step S6 is performed.

[0092] [Effects of the First Embodiment]

[0093] In the electronic control mechanical watch 1 according to the first embodiment, since a speed control device 40 using a speed governor 41 dedicated to speed control and an electromagnetic generator 70 dedicated to power generation are provided, the power generation rotor 74 can rotate at a high speed compared to the case where a generator dedicated to both power generation and speed control is provided, and the power generation performance can be improved. Therefore, it is not necessary to increase the size of the power generation coil 72 of the electromagnetic generator 70. In addition, the speed control coil 46 of the speed governor 41 is dedicated to speed control and there is no need to increase the number of turns for power generation, so the speed control coil 46 does not need to be enlarged either. Therefore, it is not necessary to increase the size of the speed control coil 46 as the first coil and the power generation coil 72 as the second coil, and the degree of freedom in component layout can be improved.

[0094] In addition, since the power generation capacity of the electromagnetic generator 70 can be improved, the drive voltage of the IC constituting the control unit 50 can also be relatively high. Therefore, as components such as ICs, it is not necessary to use high-cost ICs manufactured by special processes with low power consumption, and low-cost ICs etc. manufactured by general processes can be used.

[0095] Since the mainspring 20 can be wound by the pendulum 12 and the winding train 15, and the electromagnetic generator 70 can be operated by the pendulum 12 and the second train 60, if the user wears the electronic control mechanical watch 1 on the wrist etc. for use, the mainspring 20 can be automatically wound and the electromagnetic generator 70 can be powered. Therefore, it is not necessary for the user to manually wind the mainspring 20 or operate the electromagnetic generator 70, thus improving convenience.

[0096] In addition, since the power generation rotor 74 is dedicated to power generation, the speed increase ratio of the second train 60 that transmits the rotation of the pendulum 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 high power generation capacity can be obtained.

[0097] A power generation detection circuit 54 for detecting the power generation state of the electromagnetic generator 70 is provided, and the control circuit 53 performs fixed braking control to stop the speed control during power generation detection. Therefore, it is possible to prevent the electromagnetic noise generated during power generation from being erroneously detected as a rotation detection signal etc., and to prevent the indicated time of the hands from deviating significantly due to this erroneous detection. In addition, during power generation detection, since fixed braking control is performed, the speed of the speed control coil 46 can be appropriately controlled, and the hour hand 4, minute hand 5, and second hand 6 can also move with almost no deviation from the indicated time.

[0098] In the fixed braking control, control is performed using the control signal P1 that detects the pulse width immediately before power generation. Therefore, the speed control immediately before the detection of the power generation state can be continued, and the speed of the speed control rotor 42 can be appropriately controlled.

[0099] The speed control coil 46 of the speed governor 41 and the power generation coil 72 of the electromagnetic generator 70 are arranged at an angle of approximately 90° to each other, so that the electromagnetic coupling between the speed control coil 46 and the power generation coil 72 can be weakened, and it is possible to prevent electromagnetic noise generated from the power generation coil 72 during power generation from entering the speed control coil 46 and causing an incorrect detection of rotation detection.

[0100] As a power generation mechanism, an electromagnetic generator 70 having a power generation coil 72 and a power generation rotor 74 is provided. Therefore, there is no need to provide a dial made of synthetic resin with light transmissivity for using a solar panel, and a metal dial can be used, which can improve the appearance design of the clock.

[0101] [Second Embodiment]

[0102] As Figure 9 shown, the difference between the electronically controlled mechanical clock 1B of the second embodiment and the first embodiment is that the power generation detection circuit 54 is not provided in the control unit 50B of the movement 10B. Therefore, in the movement 10B, the same reference numerals are used for the same structures as those of the movement 10 of the first embodiment, and the description thereof is omitted.

[0103] In the movement 10B of the second embodiment, since the control unit 50B does not have the power generation detection circuit 54, as Figure 10 shown in the flowchart, when it is detected in step S1 that the power supply voltage is greater than a specified value, the rotation detection process of step S4 is performed by the rotation detection circuit 52. Then, in step S5, the control unit 50B compares the reference clock Fs with the rotation detection signal FG1. If the rotation detection signal FG1 is advanced, the forced braking control of step S6 is executed. If the rotation detection signal FG1 is delayed, the weak braking control of step S7 is executed.

[0104] [Effects of the Second Embodiment]

[0105] According to the electronically controlled mechanical clock 1B of the second embodiment, the same effects as those of the electronically controlled mechanical clock 1 of the first embodiment can be achieved. Moreover, although the control unit 50B does not have the power generation detection circuit 54, similar to the electronically controlled mechanical clock 1 of the first embodiment, the speed control coil 46 of the speed governor 41 and the power generation coil 72 of the electromagnetic generator 70 are arranged at an angle of approximately 90° to each other. Therefore, in the control unit 50B without the power generation detection circuit 54, the electromagnetic coupling between the speed control coil 46 and the power generation coil 72 can also be weakened, and it is possible to prevent electromagnetic noise generated from the power generation coil 72 during power generation from entering the speed control coil 46 and causing an incorrect detection of rotation detection.

[0106] [Third Embodiment]

[0107] As Figure 11As shown, the differences between the electronically controlled mechanical watch 1C of the third embodiment and those of the first and second embodiments are as follows: A rectification / speed regulation unit 47C connected to the speed regulation coil 46 is provided 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; and the control unit 50C has an oscillation circuit 51, a rotation detection circuit 52, and a control circuit 53, and does not have a power generation detection circuit 54 and an overcharge prevention circuit 55.

[0108] As Figure 12 shown, the rectification / speed regulation unit 47C includes a first switch 151, a second switch 152, and diodes 157 and 158.

[0109] The first switch 151 is composed of P-channel field effect transistors 153 and 154 connected between the first terminal MG11 of the speed regulation coil 46 and the first power supply 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 regulation coil 46, and the gate of the field effect transistor 154 is connected to the control circuit 53.

[0110] 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 supply 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.

[0111] Therefore, the speed regulation coil 46 as the first coil is electrically connected to the power storage device 90 via the first switch 151, the second switch 152, the diodes 157 and 158 of the rectification / speed regulation unit 47C.

[0112] The gates of the field effect transistors 153 of the first switch 151 and the field effect transistor 155 of the second switch 152 are respectively connected to the second terminal MG12 and the first terminal MG11. Therefore, when an induced electromotive force is generated in the speed regulation coil 46, the transistors connected to the low-potential side terminal of the speed regulation coil 46 in the field effect transistors 153 and 155 become in the cut-off state, and the transistors connected to the high-potential side terminal become in the conducting state.

[0113] The field effect transistors 154 of the first switch 151 and the field effect transistor 156 of the second switch 152 perform chopper control by being input with the control signal P1 output from the control circuit 53 through the gates, and are controlled to be in the conducting state or the cut-off state at the same time. Therefore, the field effect transistors 154 and 156 short-circuit the first terminal MG11 and the second terminal MG12 of the speed regulation coil 46.

[0114] Diodes 157 and 158 are disposed between the first terminal MG11 and the second terminal MG12 of the speed control coil 46 and the second power line 92. Diodes 157 and 158 can be any type of unidirectional element as long as they allow current to flow in one direction. For example, Schottky barrier diodes or silicon diodes can be used.

[0115] If Figure 12 As shown in FIG. 1 , the rectifier / speed regulating unit 47C of the electronically controlled mechanical timepiece 1C is a full-wave rectifier circuit, and therefore, the power storage device 90 can be charged by generating electricity using the speed regulating coil 46 through the rotation of the speed regulating rotor 42. In addition, after the field effect transistors 154 and 156 are turned on by the control signal P1 to apply electromagnetic braking, a chopper-boosted voltage is generated in the speed regulating coil 46 by chopping control to turn off the field effect transistors 154 and 156, and the power storage device 90 can be charged with the generated voltage. Therefore, the rectifier / speed regulating unit 47C functions as a charging circuit for the power storage device 90.

[0116] [Effects of the third embodiment]

[0117] According to the electronically controlled mechanical timepiece 1C of the third embodiment, the same effect as the electronically controlled mechanical timepiece 1 of the first embodiment can be achieved. In addition, since the rectifying / speed regulating unit 47C is provided instead of the speed regulating unit 47, the electric energy generated by the speed regulator 41 can be charged into the power storage device 90 in addition to the electric energy generated by the electromagnetic generator 70. That is, the speed regulator 41 can be used as both a speed regulator and a generator, the power generation capacity of the electronically controlled mechanical timepiece 1C can be improved, and the time for charging the power storage device 90 can be shortened.

[0118] In addition, in the electronically controlled mechanical timepiece 1C, the control unit 50C may also include a power generation detection circuit 54 and an overcharge prevention circuit 55.

[0119] [Fourth Implementation]

[0120] If Figure 13 、 Figure 14 As shown in the fourth embodiment, in the electronically controlled mechanical timepiece 1D, the winding of the mainspring 20 and the power generation of the electromagnetic generator 70 are implemented by the crown 7 instead of the pendulum 12. Therefore, the same symbols are marked for the same or corresponding structures as the electronically controlled mechanical timepiece 1 of the first embodiment, and the description is omitted or simplified.

[0121] The movement 10D of the electronically controlled mechanical timepiece 1D has a manual winding mechanism 11D for winding the mainspring 20. The manual winding mechanism 11D is composed of the crown 7 and the winding wheel train 15D. Also as Figure 14 ​​​​​As shown, the mainspring winding train 15D has a stem shaft 211, a clutch wheel 212, a crown wheel 213, a pinion 214, and a large steel wheel intermediate wheel 215. When the stem head 7 fixed to the stem shaft 211 is rotated, the large steel wheel 25 and the barrel arbor 22 are rotated via the mainspring winding train 15D, thereby winding the mainspring 20.

[0122] The first gear train 30D is configured in the same manner as the first gear train 30 and has a second gear 32, a third gear 33, a fourth gear 34, a fifth gear 35, and a sixth gear 36.

[0123] The speed governor 41D of the speed control device 40D has a speed governor rotor 42 as a first rotor, a rotor pinion 43, a stator 45, a speed control coil 46 as a first coil, and a magnetic core 48. Both ends of the magnetic core 48 around which the speed control coil 46 is wound are connected to the stator 45. The speed governor rotor 42 is rotated by meshing with the sixth gear 36 through the rotor pinion 43.

[0124] The second gear train 60D has: a first transmission wheel 261 that meshes with the pinion 214; a second transmission wheel 262 that has a pinion meshing with the first transmission wheel 261; and a third transmission wheel 263 that has a pinion meshing with the second transmission wheel 262.

[0125] The electromagnetic generator 70D has a magnetic core 71, a power generation coil 72 as a second coil, a stator 73, a power generation rotor 74 as a second rotor, and a rotor pinion 75. The rotor pinion 75 meshes with the third transmission wheel 263, and the power generation rotor 74 is rotated via the second gear train 60D.

[0126] In addition, the large steel wheel intermediate wheel 215 and the first transmission wheel 261 may be configured to rotate simultaneously through the pinion 214, but are preferably configured to selectively rotate one of the large steel wheel intermediate wheel 215 and the first transmission wheel 261 according to the rotation direction of the pinion 214. That is, it is preferably configured such that the large steel wheel intermediate wheel 215 transmits the rotation of the pinion 214 to the large steel wheel 25 only when the pinion 214 rotates in the first direction, and the first transmission wheel 261 transmits the rotation of the pinion 214 to the second transmission wheel 262 only when the pinion 214 rotates in the second direction opposite to the first direction.

[0127] Therefore, it is configured as follows: when the stem head 7 rotates in one direction, either clockwise or counterclockwise, at the 0-level position, the pinion 214, the large pinion intermediate wheel 215, and the large pinion 25 rotate, so that the mainspring 20 is wound. Additionally, when the stem head 7 rotates in the other direction, either clockwise or counterclockwise, at the 0-level position, the pinion 214, the first transmission wheel 261, the second transmission wheel 262, the third transmission wheel 263, and the power generation rotor 74 rotate, and power is generated using the power generation coil 72. Additionally, the power generation rotor 74 uses a 6-pole rotor with 3 N poles and 3 S poles each. Compared with the case of using a 2-pole rotor, the power generation frequency can be increased, and a large electromotive force can be obtained.

[0128] Alternatively, it can also be configured such that the power generation by the electromagnetic generator 70D and the winding of the mainspring 20 can be selected according to the pulled-out position of the stem head 7. For example, it can also be: when the stem head 7 is rotated at the 0-level position, the power generation rotor 74 is rotated via the second gear train 60D to generate power, and when the stem head 7 is rotated at the first-level position where it is pulled out one level, the mainspring 20 is wound via the winding gear train 15D.

[0129] [Effects of the Fourth Embodiment]

[0130] According to the electronically controlled mechanical watch 1D of the fourth embodiment, since it has the speed governor 41D and the electromagnetic generator 70D, it can achieve the same effects as the electronically controlled mechanical watch 1 of the first embodiment. In addition, by the user operating the stem head 7, the winding of the mainspring 20 and the power generation by the electromagnetic generator 70D can be implemented. Therefore, without wearing the electronically controlled mechanical watch 1D, the user can reliably wind the mainspring 20 or generate power by operating the stem head 7.

[0131] [Modification Example]

[0132] Furthermore, 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.

[0133] In the first to third embodiments, the mainspring 20 is wound and the electromagnetic generator 70 generates power through the automatic winding mechanism 11 using the pendulum 12. In the fourth embodiment, the mainspring 20 is wound and the electromagnetic generator 70D generates power through the manual winding mechanism 11D using the stem head 7. However, the mainspring 20 winding mechanism and the mechanisms for generating power using the electromagnetic generators 70 and 70D are not limited to the structures of the above-described embodiments.

[0134] For example, it can be as follows: The winding of the mainspring 20 is performed by both the automatic winding mechanism 11 using the pendulum 12 and the manual winding mechanism 11D using the winding crown 7, and the power generation of the electromagnetic generator 70 is performed by the pendulum 12. In addition, it can also be as follows: The winding of the mainspring 20 is performed by both the automatic winding mechanism 11 using the pendulum 12 and the manual winding mechanism 11D using the winding crown 7, and the power generation of the electromagnetic generator 70 is performed manually by operating the winding crown 7.

[0135] In the third and fourth embodiments, a power generation detection circuit 54 may also be provided to perform fixed braking control when power generation is detected. In addition, in the fixed braking control of step S8, as the fixed chopping signal, i.e., the control signal P1, the chopping signal of the immediately preceding braking duty ratio is used, but a chopping signal of a preset braking duty ratio may also be used. For example, in the case where a chopping signal with a braking duty ratio of 80% is used for forced braking control and a chopping signal with a braking duty ratio of 30% is used for weak braking control, a chopping signal with a braking duty ratio of 55% may also be used for fixed braking control. In addition, the braking duty ratio of the fixed chopping signal for fixed braking control is not limited to 55%, and may also be 40% or 50%, etc., and can be appropriately set according to the movement.

[0136] The control circuit 53 selects and outputs two types of chopping signals, namely, a chopping signal with a braking duty ratio of 80% for forced braking control and a chopping signal with a braking duty ratio of 30% for weak braking control, but three or more types of chopping signals may also be selected for output. For example, it can also be configured such that if the count value of the reversible counter of the control circuit 53 is "11", a chopping signal with a braking duty ratio of 40% is output, if the count value is "10" or less, a chopping signal with a braking duty ratio of 30% is output, if the count value is "12", a chopping signal with a braking duty ratio of 70% is output, and if the count value is "13" or more, a chopping signal with a braking duty ratio of 80% is output.

[0137] As the speed control device for controlling the speed of the first wheel train 30, it is not limited to controlling the speed of the speed control rotor 42 linked to the first wheel train 30 as in the above embodiments. For example, it can also be applied to an electronically controlled mechanical watch that uses an escape wheel, an escape fork, and a balance spring mechanism to control the speed of the first wheel train 30 and detects the vibration of the balance spring mechanism to control the operation of the balance spring mechanism. Specifically, a rotor of the speed control device can also be installed on the balance shaft of the balance spring mechanism, and the rotation of the rotor, i.e., the speed of the balance spring mechanism, can be accurately controlled by chopping control of the speed control coil.

[0138] [Summary]

[0139] The electronically controlled mechanical timepiece disclosed in the present invention comprises: a mainspring; a winding mechanism that winds the mainspring; a first wheel train that transmits the mechanical energy of the mainspring; a pointer that is driven by the first wheel train to display the time; a speed regulating device that controls the rotation speed of the first wheel train; a control device that outputs a control signal for controlling the rotation speed to the speed regulating device; a power generation mechanism that generates electric energy in conjunction with the winding mechanism; and a power storage device that stores the electric energy generated by the power generation mechanism. The control device and the speed regulating device operate using the electric energy stored in the power storage device. The speed regulating device comprises: 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 in response to the control signal to control the rotation speed of the first wheel train. The power generation mechanism comprises: a second wheel train that operates in conjunction with the winding mechanism to increase the speed of the movement of the winding mechanism; a second rotor that rotates in conjunction with the second wheel train; and a second coil that generates the electric energy through the rotation of the second rotor.

[0140] According to the electronically controlled mechanical timepiece of the present invention, the power generation mechanism generates electric energy through the second rotor, and the second rotor rotates via the second wheel train that speeds up the action of the winding mechanism. The power generation mechanism is set in a system different from the speed regulating device, and the speed regulating device regulates the speed of the first wheel train driven by the mainspring wound by the winding mechanism. Therefore, compared with the case of setting a generator for both power generation and speed regulation, the second rotor can be rotated at a high speed, and the power generation capacity can be improved. Therefore, there is no need to enlarge the second coil of the power generation mechanism. In addition, the first coil of the speed regulating device is also set for speed regulation, and there is no need to increase the number of turns for power generation, so the first coil does not need to be enlarged. Therefore, there is no need to enlarge the first coil and the second coil separately, and the degree of freedom of component layout can be improved.

[0141] In addition, since the power generation capacity of the power generation mechanism can be improved, the driving voltage of the IC constituting the control unit can also be relatively high. Therefore, as components such as ICs, there is no need to use high-cost ICs manufactured by special processes with low power consumption, and low-cost ICs manufactured by general processes can be used.

[0142] In the electronically controlled mechanical timepiece disclosed herein, it is preferred that the speed regulating device controls the rotation speed of the first rotor to a first rotation speed, and the rotation speed of the second rotor when the winding mechanism performs the winding action, i.e., the second rotation speed, is higher than the first rotation speed.

[0143] In the electronically controlled mechanical timepiece according to the present disclosure, 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. Therefore, the power generation ability in the second coil can be improved. That is, in order to cause the hands driven by the first gear train to move at a predetermined reference speed, the first rotational speed is usually set to 6 Hz or 8 Hz, etc. On the other hand, there is no restriction such as speed regulation for the second rotational speed. Therefore, for example, it can be set to more than 10 times the first rotational speed such as 100 Hz, and the power generation ability in the power generation mechanism can be improved.

[0144] In the electronically controlled mechanical timepiece of the present invention, the winding mechanism may include a pendulum and a winding gear train that transmits the rotation of the pendulum.

[0145] In the electronically controlled mechanical timepiece according to the present invention, since the winding mechanism having a pendulum and a winding gear train is used, by wearing the electronically controlled mechanical timepiece on the wrist and shaking it, etc., the pendulum rotates, so that the mainspring can be automatically wound and power can be generated by the power generation mechanism, thereby improving convenience.

[0146] In the electronically controlled mechanical timepiece according to the present disclosure, the winding mechanism may include a winding stem and a winding gear train that transmits the rotation of the winding stem.

[0147] In the electronically controlled mechanical timepiece according to the present disclosure, since the winding mechanism having a winding stem and a winding gear train is used, by manually operating the winding stem by the user, the mainspring can be wound and power can be generated by the power generation mechanism. Therefore, before wearing the electronically controlled mechanical timepiece on the wrist and using it, the user can also operate the winding stem to reliably wind the mainspring or generate power.

[0148] In the electronically controlled mechanical timepiece according to the present disclosure, preferably, the electronically controlled mechanical timepiece has a power generation detection circuit that detects the power generation state of the power generation mechanism. During the period when power generation is detected by the power generation detection circuit, the speed control device performs a process of stopping the rotational speed control.

[0149] In the electronically controlled mechanical timepiece according to the present disclosure, during the period when power generation is detected by the power generation detection circuit, the speed control device stops the rotational speed control, so that it is possible to prevent misdetection of the noise during power generation as rotational detection.

[0150] In the electronically controlled mechanical timepiece according to the present disclosure, preferably, the control signal is a chopper signal whose pulse width is variably controlled and is generated based on a comparison result of comparing a rotation detection signal with a reference signal. The rotation detection signal is based on the electromotive force waveform of the first coil. In the process of stopping the rotational speed control, a fixed chopper signal whose variable control has been stopped is output as the control signal.

[0151] In the electronically controlled mechanical timepiece according to the present disclosure, during the period when power generation is detected by the power generation detection circuit, a fixed chopping signal is output as a control signal. Therefore, the rotational speed of the first rotor can be appropriately controlled.

[0152] In the electronically controlled mechanical timepiece according to the present disclosure, alternatively, the pulse width of the fixed chopping signal may be set to the pulse width immediately before the control of the rotational speed is stopped.

[0153] In the electronically controlled mechanical timepiece according to the present disclosure, since the pulse width of the fixed chopping signal is set to the immediately preceding pulse width, the speed control immediately before the detection of the power generation state can be continued, and the rotational speed of the first rotor can be appropriately controlled.

[0154] In the electronically controlled mechanical timepiece according to the present disclosure, alternatively, the pulse width of the fixed chopping signal may be set to a preset fixed pulse width.

[0155] In the electronically controlled mechanical timepiece according to the present disclosure, the pulse width of the fixed chopping signal is set to a preset fixed pulse width. Therefore, during the detection of the power generation state, the average speed control can also be continued, and the rotational speed of the first rotor can be appropriately controlled.

[0156] In the electronically controlled mechanical timepiece according to the present disclosure, preferably, the first coil is electrically connected to the power storage device, and the speed control device has a charging circuit. The charging circuit boosts the electric energy generated by the first coil and charges the power storage device through chopping control that shorts the terminals of the first coil based on the control signal, and controls the rotational speed of the first gear train via the first coil.

[0157] In the electronically controlled mechanical timepiece according to the present disclosure, the speed control device has a charging circuit. Therefore, power generation can be performed by both the power generation mechanism and the charging circuit of the speed control device to charge the power storage device. Therefore, the power generation ability of the electronically controlled mechanical timepiece can be improved, and the time required to charge the power storage device can also be shortened.

Claims

1. An electronically controlled mechanical clock, characterized in that: have: Clockwork; a winding mechanism for winding the mainspring; a first gear train, which transmits the mechanical energy of the mainspring; A pointer 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, which outputs a control signal for controlling the rotation speed to the speed regulating device; a power generation mechanism that generates electrical energy in conjunction with the winding mechanism; as well as an electric storage device for storing the electric energy generated by the electric power generation mechanism, The control device and the speed regulating device operate using the electric energy stored in the power storage device. The speed regulating device has: a first rotor that rotates in conjunction with the first gear train; and a first coil, which generates an electromagnetic force applied to the first rotor in response to the control signal to control the rotation speed of the first gear train, The power generation mechanism comprises: A second wheel system, which is linked with the winding mechanism to speed up the movement of the winding mechanism; a second rotor that rotates in conjunction with the second gear train; as well as The second coil generates the electric energy through the rotation of the second rotor.

2. The electronically controlled mechanical timepiece according to claim 1, characterized in that: The speed regulating device controls the speed of the first rotor to be a first speed, A second rotational speed, which is a rotational speed of the second rotor when the winding mechanism is winding, is higher than the first rotational speed.

3. The electronically controlled mechanical timepiece according to claim 1, characterized in that: The winding mechanism has an oscillating weight and a winding wheel train that transmits the rotation of the oscillating weight.

4. The electronically controlled mechanical timepiece according to claim 1, characterized in that: The winding mechanism includes a crown and a winding wheel train that transmits rotation of the crown.

5. The electronically controlled mechanical timepiece according to claim 1, characterized in that: The electronically controlled mechanical timepiece includes a power generation detection circuit for detecting the power generation state of the power generation mechanism. The speed regulator executes a process of stopping the control of the rotation speed while the power generation detection circuit detects power generation.

6. The electronically controlled mechanical timepiece according to claim 5, characterized in that: The control signal is a chopper signal whose pulse width is variably controlled and is generated based on a comparison result of a rotation detection signal based on an electromotive force waveform of the first coil and a reference signal. In the process of stopping the control of the rotation speed, a fixed chopping signal for stopping the variable control is output as the control signal.

7. The electronically controlled mechanical timepiece according to claim 6, characterized in that: The pulse width of the fixed chopping signal is set to a pulse width immediately before the control of the rotation speed is stopped.

8. The electronically controlled mechanical timepiece according to claim 6, characterized in that: The pulse width of the fixed chopping signal is set to a preset fixed pulse width.

9. The electronically controlled mechanical timepiece according to claim 1, characterized in that: The first coil is electrically connected to the power storage device. The speed regulating device has a charging circuit that increases the voltage of the electric energy generated by the first coil and charges the electric energy to the power storage device by chopper control that short-circuits the terminals of the first coil based on the control signal, and controls the rotation speed of the first wheel train via the first coil.

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