JP6853082B2 - Governor, electronically controlled mechanical clock, electronic equipment - Google Patents

Description

The present invention relates to a speed governor using a ferrofluid, an electronically controlled mechanical timepiece, and an electronic device.

An electronically controlled system that converts the mechanical energy when the mainspring is unwound into electrical energy with a generator, and uses that electrical energy to operate the rotation control means to accurately drive the pointer and display the time accurately. Mechanical clocks are known.

Among such electronically controlled mechanical timepieces, as the rotation control means, there is a mechanism provided with a piezoelectric speed governor that can be easily miniaturized and can reduce friction loss (see, for example, Patent Document 1). The electronically controlled mechanical clock using this piezoelectric speed governor is equipped with a piezoelectric material on the balance spring, and the spring constant can be changed by turning on and off the electrodes of the piezoelectric material to control the vibration frequency of the balance spring. it can. A motor is not required to drive the pointer using the mainspring as a power source, and it is characterized by high accuracy comparable to that of a battery-powered electronic clock.
However, since a speed governor that adjusts the vibration frequency of the balance spring by changing the spring constant of the piezoelectric material is used, there are the following problems.
(A) It is difficult to form a balance spring, which requires delicate bending and processing accuracy, from a piezoelectric material, and the cost is high.
(B) Piezoelectric materials used for speed control and generators are generally known to deteriorate with the number of vibrations, and reliability over a long period of time cannot be obtained.
(C) It is necessary to convert the reciprocating vibration of the balance spring into a rotary motion, in which case a separate escape mechanism is required, the transmission path itself becomes complicated, and miniaturization is difficult.
(D) Electric power is generated by the vibration of the piezoelectric material to supply electric power to the control circuit, but the amount of electric power obtained from the piezoelectric material is small, and a sufficient amount of electric power cannot be secured to stably drive the control circuit.

JP-A-2002-228774

Therefore, an object of the present invention is to provide a speed governor, an electronically controlled mechanical clock, and an electronic device, which can prevent a decrease in speed control accuracy and are easy to miniaturize and have high efficiency.

In order to solve the above problems, one aspect of the present invention is to use a ferrofluid provided on a transmission path of rotational motion by a plurality of rotating components constituting the train wheel and a magnetic field applied to the ferrofluid. The speed control device is provided with a control unit that changes the rotation frequency of the rotary motion by changing the speed.
Further, one aspect of the present invention is that in the speed controller, the ferrofluid is provided on one axis of one rotating component on the transmission path and is arranged around the ferrofluid. The stator, the magnetic core that abuts on the end of the stator, and the coil wound around the magnetic core are provided, and the control unit changes the energized state of the coil so as to keep the rotation frequency constant. It is characterized by that.

Further, one aspect of the present invention is characterized in that, in the above speed governor, the control unit is driven by a battery or a power source.

Further, in one aspect of the present invention, in the speed controller, the control unit changes the magnetic field so that the viscosity of the ferrofluid becomes low when the rotation frequency is lower than the frequency of the set signal. The magnetic field is changed so that the viscosity of the ferrofluid becomes higher when the rotation frequency is higher than the frequency of the set signal.

Further, one aspect of the present invention is characterized in that, in the above speed governor, the set signal is output from a reference signal source provided in the magnetic viscosity speed governor.

Further, one aspect of the present invention is characterized in that, in the above speed governor, the viscosity of the ferrofluid is changed by energizing the coil.

Further, one aspect of the present invention includes a mechanical energy source for transmitting mechanical energy to the train wheel, a pointer driven by the mechanical energy, and the speed governor, wherein the magnetically viscous fluid is the same. An electronically controlled mechanical clock characterized in that it is provided on one axis of a rotating component on a transmission path provided between a mechanical energy source and the pointer.

Further, one aspect of the present invention is the above-mentioned electronically controlled mechanical clock, the rotor having a permanent magnet on the transmission path, the stator for power generation arranged around the rotation axis of the rotor, and the said. The power generation stator provided with a power generation magnetic core abutting on the end of the power generation stator and a power generation coil wound around the power generation magnetic core, and between the power generation stator facing the rotor shaft. A magnetic viscous fluid is provided, and the control unit is driven by a power induced in the power generation coil.

Further, one aspect of the present invention is an electronic device including a mechanical energy source for supplying mechanical energy and the speed governor described above.

According to the speed governor according to the present invention, a compact speed governor with low power consumption and long life can be realized by utilizing the change in viscosity of the ferrofluid.

It is a schematic plan view which shows the structure of the main part of the electronically controlled mechanical timepiece which concerns on Embodiment 1 of this invention. It is a schematic side view which shows the structure of the main part of the electronically controlled mechanical timepiece which concerns on Embodiment 1 of this invention. It is a block diagram which shows the structure of the electronically controlled mechanical timepiece of Embodiment 1 of this invention. It is sectional drawing of the speed governor along the line AA shown in FIG. It is a top view of the speed governor in Embodiment 1 of this invention. It is a perspective view of the electromagnet in Embodiment 1 of this invention. It is a perspective view which shows the modification of the electromagnet in the speed governor of this invention. It is a schematic plan view which shows the structure of the main part of the electronically controlled mechanical timepiece which concerns on Embodiment 2 of this invention. It is a schematic side view which shows the structure of the main part of the electronically controlled mechanical timepiece which concerns on Embodiment 2 of this invention. It is a block diagram which shows the structure of the electronically controlled mechanical timepiece of Embodiment 2 of this invention. It is sectional drawing around the speed governor along the line BB shown in FIG.

(Embodiment 1)
Hereinafter, an embodiment of the speed governor according to the present invention will be described with reference to FIGS. 1 to 6.

FIG. 1 shows a schematic configuration of the electronically controlled mechanical timepiece 100 of the present invention, FIG. 2 shows a cross-sectional view thereof, and FIG. 3 shows a block diagram.

The electronically controlled mechanical clock 100 includes a barrel wheel 1 including a spring, a barrel gear 1b, a barrel true, and a barrel lid. The rotation of the barrel gear 1b is accelerated via the second wheel 2, the third wheel 3, and the fourth wheel 4 which are the speed-increasing wheel trains. Each of these number wheels 2 to 4 is pivotally supported by a main plate, a train wheel receiver, or the like. Then, each of these number wheels 2 to 4 constitutes a mechanical energy transmission means (wheel train) that transmits mechanical energy from a royal fern (barrel 1b), which is a mechanical energy source, as a rotational motion. In the present embodiment, the mainspring utilizing the elastic force is taken up as a mechanical energy source, but other mechanical energy sources such as a motor may also be used.

Further, the electronically controlled mechanical timepiece 100 includes an escapement 10 having an escape wheel 21 and an ankle 22 and a mechanical speed governor 11 having a balance 23, which are similar to a normal mechanical timepiece. ing.

The escapement gradually supplies the mechanical energy supplied from the Zenmai (incense box gear 1b) to the mechanical speed governor 11 via the fourth wheel 4 to maintain the vibration of the mechanical speed governor 11. , The rotation speed of the train wheel is adjusted according to the vibration cycle of the mechanical speed governor 11.

The balance 23 is configured to include a balance wheel 24, a balance spring 30, a swing seat, and the like. The inner peripheral end of the balance spring 30 is fixed to a beard ball at the center of the ten ring 24, and the outer peripheral end is supported by a beard holder fixed to a main plate or the like. As shown in FIG. 4, the balance upper tenon 30a and the balance lower tenon 30b, which are the shaft portions of the balance 23, are pivotally supported by a bearing mechanism composed of a hole stone 31, a receiving stone 32, and a seismic holding spring 33. In FIG. 4, only the bearing mechanism of the balance upper tenon 30a is displayed, but in reality, the balance lower tenon 30b is also provided with the bearing mechanism.

Then, in the present embodiment, as shown in FIGS. 4 and 5, the magnetic viscous fluid 40 is arranged in the play space between the balance upper tenon 30a and the hole stone 31. The ferrofluid 40 is held at that position by an oil retention device provided in the bearing mechanism. A magnet may be separately arranged and the magnetic viscous fluid 40 may be held by the magnetic force of the magnet.

In this way, since the ferrofluid 40 is held so as to surround the balance upper groove 30a, the vibration frequency of the whiskers 30 is affected by the mechanical energy given by the escapement and the load of the train wheel. In addition, it will also be affected by the viscosity of the ferrofluid 40. That is, the rotation frequency of the train wheel via the escapement 10 can be changed by changing the viscosity of the ferrofluid 40.

Further, in the present embodiment, the ferrofluid 40 also plays a role of lubrication between the balance upper tenon 30a and the hole stone 31, and between the balance upper tenon 30a and the receiving stone 32. Therefore, the ferrofluid 40 preferably has a submicron average particle size so as not to wear the tenon 30a on the balance, the hole stone 31 and the receiving stone 32, and to have sufficient lubricity. A general watch lubricant is provided on the lower tenon 30b of the balance.

Further, in order to apply a magnetic field to the ferrofluid 40, an electromagnet 50 composed of a coil 51, a stator 52, and a magnetic core 53 is provided around the ferrofluid 40. The stator 52 and the magnetic core 53 are made of a soft magnetic material having a high magnetic permeability in order to give a sufficient magnetic field to the ferrofluid 40, and are made of a metal such as an electromagnetic steel plate or permalloy. As will be described in a modified example described later, the stator 52 and the magnetic core 53 may include a magnet having an appropriate coercive force.

Further, in order to reduce the number of turns of the coil 51 and to reduce the size of the electronically controlled mechanical timepiece 100, as shown in FIG. 6, the end portion of the stator 52 facing the ferrofluid 40 side is sharpened. Is preferable. With such a shape, the magnetic field lines generated by passing an electric current through the coil 51 are concentrated on the magnetic viscous fluid 40, and the viscosity of the magnetic viscous fluid 40 can be changed with a small number of turns and a small current.

As shown in FIG. 3, the coil 51 (electromagnet 50) is connected to the control circuit 62, and the viscosity of the ferrofluid 40 can be adjusted by an output signal from the control circuit 62. Specifically, the control circuit 62 detects the vibration frequency of the whiskers 30 or the rotation frequency of a rotating component in the train wheel, and the crystal oscillator (actually, the crystal oscillator circuit including the crystal oscillator as a reference signal source) ) It is configured to adjust the current flowing through the electric magnet 50 as described later by comparing with the setting signal divided based on the signal from 64.

The electronic speed governor 70 is composed of the ferrofluid 40, the electromagnet 50, the control circuit (control unit) 62, and the crystal oscillator (crystal oscillator circuit) 64.

The control circuit 62 changes the magnetic field applied to the ferrofluid 40 to lower the viscosity of the ferrofluid 40 when the rotation frequency of the train wheel is lower than the frequency of the set signal, and lowers the viscosity of the ferrofluid 40 than the frequency of the set signal. When it is high, the viscosity of the ferrofluid 40 is increased to change the rotation frequency of the rotating component. By performing such control, when the rotation frequency of the transmission path is lower than the set frequency, the viscosity becomes low, so that the vibration becomes fast. On the other hand, when the rotation frequency of the transmission path is higher than the set frequency, the viscosity becomes high and the vibration becomes slow. Therefore, the rotation frequency of the transmission path can be converged to the same frequency as the set signal, and the rotation frequency can be easily adjusted. In the present embodiment, the viscosity of the magnetic viscous fluid 40 is changed and adjusted by changing the current flowing through the coil 51. At this time, the current is not limited to direct current or alternating current, and the current is not limited to direct current or alternating current. The current may be changed in an analog manner, or may be changed by chopping a constant voltage and current.

As described above, by appropriately setting the setting signal to be compared by the control circuit 62, the rotation frequency of the transmission path is maintained at the set frequency based on the signal from the crystal oscillator 64, which is compared with a normal mechanical timepiece. The accuracy of the electronically controlled mechanical timepiece 100 is improved.

The following effects can be obtained by the embodiments described above.
(1) The train wheel can be adjusted by changing the viscosity of the ferrofluid 40 held in the balance upper groove 30a, and the design of other parts of the train wheel is not changed. A controlled mechanical clock can be realized.
(2) Since it is not necessary to introduce different materials or add electrodes to the balance spring 30 or balance 23, the weight of moving parts can be reduced, friction loss can be reduced, and the duration can be extended.
(3) Since it is not necessary to introduce a complicated mechanism or structure into the balance spring 30, it is excellent in durability.
(4) It is known that the magnetic viscous fluid has a large change in characteristics as compared with a piezoelectric material or an electrorheological fluid. Therefore, the permissible range of the vibration frequency that can be controlled becomes wide, and the speed can be controlled reliably.
(5) As with mechanical watches, the speed is controlled by the vibration of the balance 23, so even if a large torque is applied due to disturbance or the like, the amplitude will only increase, and the time accuracy with respect to torque fluctuations can be improved. it can.
(6) Further, when the control circuit 62 is stopped due to a decrease in torque or the like, in the present embodiment, the speed is controlled by vibration, so that a large instruction deviation does not occur and the duration in a state where there is no problem in use. Can be extended further.
(7) Since the control circuit 62 operates accurately for hand alignment even when the control circuit 62 is stopped, there is no need to incorporate a complicated mechanism for correcting errors during hand alignment, the cost can be reduced accordingly, and the watch 100 can be used. It can also be miniaturized.
(8) Basically, it is only necessary to equip the balance spring of the mechanical timepiece with the ferrofluid 40 and add the control circuit 62 and the electromagnet 50 constituting the electronic speed governor 70, and other ten wheels 24 and ankles. As for 22, the escape wheel 21, the train wheel, the mainspring, etc., the same parts as those of an ordinary mechanical watch can be diverted. Therefore, it is possible to suppress an increase in cost and to manufacture a highly accurate timepiece 100.
(9) It is possible to realize continuous high-beat hand movement similar to that of a mechanical watch instead of step hand movement like a quartz watch, and it is possible to suppress speed unevenness.

As described above, according to the speed governor and the electronic device of the present invention, the influence of the external magnetic field can be eliminated, the speed control accuracy can be prevented from being lowered, the size can be easily reduced, and the friction loss can be reduced. It has the effect of being able to do it.
(Modification example)
FIG. 7 shows a modified example of the electronic governor 70 according to the first embodiment.

The stator 52 or the magnetic core 53 may be a magnetic material having an appropriate coercive force instead of a soft magnetic material such as an electromagnetic steel plate or permalloy. Alternatively, in addition to the stator 52 and the magnetic core 53, a magnetic body 54 having an appropriate coercive force may be arranged on the magnetic circuit.

With this configuration, the magnetic field applied to the magnetic viscous fluid 40 has hysteresis by taking a method of magnetizing or demagnetizing the stator 52 or the magnetic core 53 itself or the magnetic body 54 by the coil 51. Become. As a result, as long as the rotation frequency of the train wheel does not change, it is not necessary to pass a current through the coil 51, and power consumption can be significantly reduced.

Further, by utilizing this feature, the power consumption can be further reduced by increasing or decelerating the speed after the accumulation error of the rotation frequency of the train wheel becomes large to some extent. Only the power consumption of the control circuit 62 is required except when the speed governor is performed, and it is not necessary to always perform the chopping operation unlike other general speed governors.
(Embodiment 2)
8 to 10 show the electronically controlled mechanical clock 200 according to the second embodiment.

The same components as those in the first embodiment are designated by the same reference numerals, and the description thereof will be simplified or omitted.

As shown in FIG. 8, the electronically controlled mechanical clock 200 is in a form in which the escapement 10 provided with the escape wheel 21 and the ankle 22 and the mechanical speed governor 11 provided with the balance 23 are abolished. Instead, the electronically controlled mechanical timepiece 200 includes a rotor 84 on the transmission path, and a generator 80 composed of a power generation coil 81, a power generation stator 82, and a power generation magnetic core 83. The rotor 84 is composed of a rotor magnet 84d and a rotor kana 84c.

Then, in the present embodiment, as shown in FIG. 11, the magnetic viscous fluid 40 is arranged in the play space between the rotor upper tenon 84a and the hole stone 31. Similar to the first embodiment, the ferrofluid 40 plays a role of both lubrication and speed control. Further, in order to apply a magnetic field to the ferrofluid 40, an electromagnet composed of a coil 51, a stator 52 and a magnetic core 53 is provided. The rotor upper groove 84a and the rotor lower groove 84b, which are the shaft portions of the rotor 84, are pivotally supported by a bearing mechanism composed of a hole stone 31, a receiving stone 32, and a seismic retaining spring 33. In FIG. 9, only the bearing mechanism of the rotor upper tenon 84a is displayed, but in reality, the rotor lower tenon 84b is also provided with the bearing mechanism in the same manner.

Although the location of the ferrofluid 40 is set to the rotor upper groove 84a here, the ferrofluid 40 may be arranged so as to be in contact with the flywheel by separately providing a flywheel on the rotor 84. Good. As described above, in the electronic speed governor 90, it is sufficient that the magnetic viscous fluid is in contact with any moving portion of the train wheel, and the degree of freedom in design can be greatly improved.

As shown in FIG. 10, the generator 80 can be used to supply electric power to the control circuit 62 of the electronic speed governor 90 and to know the rotation frequency of the train wheel from the fluctuation of the voltage or current from the generator 80. The control circuit 62 sends a control signal to the coil 51 by comparing the signal from the generator 80 with the set signal, and controls the speed of the train wheel.

The following effects can be obtained by the embodiments described above.
(1) Since the control circuit 62 is driven by the electric power generated by the generator 80, there is no need to install a separate battery, and there is no problem that it cannot be used due to electricity shortage or the like, and the electronically controlled mechanical clock 200 Can be used at any time.
Moreover, since a battery is not required, it is possible to prevent the occurrence of environmental destruction due to the disposal of the battery.
(2) Since the train wheel controlled by the present embodiment always operates at a constant frequency, stable electric power can be obtained by the generator 80.

The present invention is not limited to the above-described embodiment, and modifications, improvements, and the like within the range in which the object of the present invention can be achieved are included in the present invention.

The electronic speed governor 90 of the present invention is not limited to the case where it is applied to the electronically controlled mechanical clock 100 and the electronically controlled mechanical clock 200, and includes a mechanical energy source for supplying mechanical energy to control the speed (motion). It can be widely applied to various necessary electronic devices such as toys, music boxes, metronomes, and various machines.

As described above, the speed controller according to the above embodiment has a ferrofluid provided on the transmission path of rotational motion by a plurality of rotating components constituting the train wheel and a magnetic field applied to the ferrofluid. It is characterized by including a control unit that changes the rotation frequency of the rotary motion by changing the rotation frequency.

A ferrofluid is a functional fluid whose viscosity changes according to the strength of the applied magnetic field. Therefore, the speed of the transfer path can be adjusted by providing the magnetic viscous fluid on the transfer path of the mechanical energy.

According to the above embodiment, fine speed control can be performed by changing the viscosity according to the motion state, and highly accurate speed control can be performed. Moreover, since it can be realized only by bringing the magnetic viscous fluid into contact with the transmission path, it is not always necessary to add an escape mechanism, and the design change of the transmission path can be reduced.

Further, in the speed adjuster according to the above embodiment, in the above speed adjuster, the ferrofluid is provided on one axis of one rotating component on the transmission path, and around the ferrofluid. The stator is provided with a stator, a magnetic core that abuts on the end of the stator, and a coil wound around the magnetic core, and the control unit is in an energized state of the coil so as to keep the rotation frequency constant. It is characterized by changing.

According to the above embodiment, the current flowing through the coil provided in the speed governor can be changed to easily perform speed control without using a complicated mechanism. Further, since the viscosity of the ferrofluid changes depending on the electric current, the viscosity can be changed in an analog manner, and the rotation frequency of the transmission path can be changed with high accuracy. Therefore, a constant motion frequency can be easily obtained from a transmission path whose speed is faster than a desired frequency or a mechanical energy source whose frequency fluctuates. As a result, it can be applied to devices such as clocks and metronomes that need to be driven at a constant speed.

Further, the speed governor according to the above embodiment is characterized in that, in the above speed governor, the control unit is driven by a battery or a power source.

According to the above embodiment, if the control device is driven by various primary batteries, secondary batteries, a commercial power source supplied from a generator, an outlet, or the like, the control mechanism can be made very simple.

Further, in the speed adjuster according to the above embodiment, in the above speed adjuster, the control unit controls the magnetic field so that the viscosity of the ferrofluid becomes low when the rotation frequency is lower than the frequency of the set signal. The magnetic field is changed so that the viscosity of the ferrofluid becomes higher when the rotation frequency is higher than the frequency of the set signal.

According to the above embodiment, when the rotation frequency of the transmission path is lower than the set frequency, the viscosity becomes low, so that the vibration becomes fast. On the other hand, when the rotation frequency of the transmission path is higher than the set frequency, the viscosity becomes high and the vibration becomes slow. Therefore, the rotational frequency of the transmission path can be converged to the same frequency as the set signal, and the rotational motion can be easily adjusted. Moreover, since relatively simple feedback control is sufficient, the control device can be configured with a simple circuit, and the cost can be reduced.
Further, if the set signal can be switched, it is possible to incorporate and use a speed governor with the set signal switched even for various devices having different motion (vibration) speeds.

Further, the speed governor according to the above embodiment is characterized in that, in the above speed governor, the setting signal is output from a reference signal source provided in the control unit.

Specifically, as this setting signal, a crystal oscillation circuit using a crystal oscillator is preferable, and other oscillation circuits may be used.

According to the above embodiment, if a signal from a reference signal source such as a crystal oscillator circuit provided in the control unit is used as a setting signal, the signal can be reliably input at all times and the speed can be controlled reliably. Can be done.

Further, the speed governor according to the above embodiment is characterized in that the viscosity of the ferrofluid fluid is changed by energizing the coil in the speed governor.

According to the above embodiment, once the magnetic core is magnetized or demagnetized, the viscosity of the ferrofluid fluid can always be maintained without passing an electric current through the coil. Therefore, when the motion state of the transmission path changes due to disturbance or the like, an appropriate current needs to be passed only when the viscosity is changed, and the power consumed by the control device can be significantly reduced. Furthermore, since the viscosity is maintained even if the current cannot be controlled, it is possible to prevent a large time deviation from occurring even at a low voltage at which the IC of the control circuit does not move, and the time indication accuracy can be improved.
Further, the magnetic material to be magnetized or demagnetized is not limited to the stator and the magnetic core, and the magnetization of the magnetic material provided in the speed controller may be separately manipulated, or a magnetic circuit may be formed and a part thereof. Alternatively, the entire magnetization may be manipulated.

Further, the electronically controlled mechanical clock according to the above embodiment includes the mechanical energy source for transmitting mechanical energy to the train wheel, the pointer driven by the mechanical energy, and the speed governor, and the magnetic field. The viscous fluid is provided on one axis of a rotating component on a transmission path provided between the mechanical energy source and the pointer.

According to the above embodiment, the speed governor is incorporated in place of the conventional escape speed governor made of a balance spring or a balance, and the movement of the pointer is accurately performed by the viscosity change of the ferrofluid provided in the speed governor. You can move the hands. This makes it possible to provide an electronically controlled mechanical timepiece that accurately drives a pointer using a mechanical energy source consisting of a mainspring.

Further, the electronically controlled mechanical clock according to the above embodiment is a rotor having a permanent magnet on the transmission path and a rotor for power generation arranged around the rotation axis of the rotor in the electronically controlled mechanical clock. The stator that includes a stator, a power generation magnetic core that abuts on the end of the power generation stator, and a power generation coil that is wound around the power generation magnetic core, and that faces the rotor shaft. The magnetic viscous fluid is provided between the two, and the control unit is driven by a power induced in the power generation coil.

According to the above embodiment, by setting the speed control target to the rotor, it can be used not only as a power supply to the control mechanism but also as a part of the speed control mechanism, and a battery or the like is not required separately. Can be miniaturized and can be provided at low cost.
Furthermore, since no battery is required, it can be used at any time without being unusable due to running out of battery. Moreover, it is possible to prevent environmental destruction due to the disposal of batteries.

Further, the electronic device according to the above embodiment is characterized by including a mechanical energy source for supplying mechanical energy and the speed governor described above.

According to the above embodiment, the design change of the transmission path can be minimized, the speed control with high accuracy can be performed, the size and weight can be reduced, and the cost can be reduced.

100 Electronically controlled mechanical clock 1 Incense box wheel 1b Incense box gear 2 2nd wheel 3 3rd wheel 4 4th wheel 10 Escaper 11 Mechanical governor 21 Gangi car 22 Ankle 23 Temp 24 Temp wheel 30 Higezenmai 30a Balance upper groove 30b Balance lower groove 31 Hole stone 32 Receiving stone 33 Seismic holding spring 40 Magnetic viscous fluid 50 Electromagnetic magnet 51 Coil 52 Rotor 53 Magnetic core 54 Magnetic material 61 Oscillating circuit 62 Control circuit 63 Power supply 64 Crystal oscillator 70 Electronic speed governor 200 Electronically controlled mechanical clock 80 Generator 81 Power generation coil 82 Power generation stator 83 Power generation magnetic core 84 Rotor 84a Rotor upper hozo 84b Rotor lower hozo 84c Rotor magnet 84d Rotor Kana 90 Electronic speed governor

Claims (9)

A control unit that changes the rotational frequency of the rotational motion by changing the ferrofluid provided on the transmission path of the rotational motion by a plurality of rotating components constituting the train wheel and the magnetic field applied to the ferrofluid. equipped with a door,
The ferrofluid is provided on one axis of one rotating component on the transmission path, and has a stator arranged around the ferrofluid and a magnetic core abutting on the end of the stator. A speed regulator comprising a coil wound around the magnetic core, and the control unit changing the energized state of the coil so as to keep the rotation frequency constant . The speed governor according to claim 1 , wherein the control unit is driven by a battery or a power source. The control unit changes the magnetic field so that the viscosity of the ferrofluid becomes low when the rotation frequency is lower than the frequency of the set signal, and when the rotation frequency is higher than the frequency of the set signal, the control unit changes the magnetic field. The speed controller according to claim 1 or 2 , wherein the magnetic field is changed so that the viscosity of the ferrofluid becomes high. The speed governor according to claim 3 , wherein the setting signal is output from a reference signal source provided in the control unit. The speed governor according to claim 1 , wherein the viscosity of the ferrofluid is changed by energizing the coil. A mechanical energy source for transmitting mechanical energy to a train wheel, a pointer driven by the mechanical energy, and a speed governor according to any one of claims 1 to 5 are provided.
An electronically controlled mechanical timepiece characterized in that the ferrofluid is provided on one axis of a rotating component on a transmission path provided between the mechanical energy source and the pointer. A mechanical energy source that transmits mechanical energy to the train wheel, a pointer driven by the mechanical energy, and
Control to change the rotational frequency of the rotational motion by changing the ferrofluid provided on the transmission path of the rotational motion by the plurality of rotating components constituting the train wheel and the magnetic field applied to the ferrofluid. Equipped with a speed controller equipped with a part
The ferrofluid is provided on one axis of a rotating component on a transmission path provided between the mechanical energy source and the pointer.
A rotor having a permanent magnet on the transmission path, a stator for power generation arranged around the rotation axis of the rotor, a magnetic core for power generation that abuts on the end of the stator for power generation, and a magnetic core for power generation. It is provided with a power generation coil wound around a magnetic core, and the magnetic viscous fluid is provided between the rotor shaft and the power generation stator facing the rotor.
The control unit is an electronically controlled mechanical timepiece characterized in that it is driven by electric power induced in the power generation coil. A rotor having a permanent magnet on the transmission path, a stator for power generation arranged around the rotation axis of the rotor, a magnetic core for power generation that abuts on the end of the stator for power generation, and a magnetic core for power generation. It is provided with a power generation coil wound around a magnetic core, and the magnetic viscous fluid is provided between the rotor shaft and the power generation stator facing the rotor.
The electronically controlled mechanical timepiece according to claim 6 , wherein the control unit is driven by electric power induced in the power generation coil. An electronic device comprising a mechanical energy source for supplying mechanical energy and a speed governor according to any one of claims 1 to 5.

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