JP2016070846A - Electronic apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electronic apparatus which operates by generating electricity by electrostatic induction, in which the state of portability of the apparatus is grasped without increasing the size and the efficiencies of electricity generation and power consumption are increased.SOLUTION: An electronic apparatus 2 includes: an enclosure 10; a rotating member freely rotating with respect to the enclosure 10; an electricity generation unit 20 generating electricity using electrostatic induction by rotation of the rotating member; a rotation detecting unit 30B detecting rotation of the rotating member; an electricity storage unit 50 storing electric power generated by the electricity generation unit 20; an operating unit 60 operating with the electric power supplied from the electricity storage unit 50; and a control unit 70 controlling the operation of the operating unit 60 according to the output of the rotation detecting unit 30B.SELECTED DRAWING: Figure 10

Description

  The present invention relates to an electronic device that operates by generating electricity by electrostatic induction.

  Patent Document 1 describes a portable electronic device provided with a portable determination unit that automatically determines whether the body is carried or not carried. When the portable electronic device is determined to be portable, the measurement value obtained by the physical quantity measurement unit is corrected and displayed by the correction control unit, and when the portable electronic device is determined to be non-portable, the measurement value is displayed without correction. .

  Patent Documents 2 and 3 describe portable electronic devices that can switch between a power saving mode and a normal operation mode in accordance with a user's usage state. The electronic device includes a power generation device that generates power, a power supply device that can store electric energy obtained by power generation, a driven device that is driven using power supplied from the power supply device, and a power generation state of the power generation device Based on the detection result of the portable detection device, the power consumption of the driven device is reduced when the electronic device is in a non-portable state. In order to reduce this, the operation mode of the driven device is shifted from the normal operation mode to the power saving mode.

  Patent Documents 4 to 7 describe power generation devices that use electrostatic induction by electrets. An electret is a dielectric that generates an electrostatic field semi-permanently when electric charge is injected into it. In addition, electrostatic induction is a phenomenon in which when a charged object is brought close to a conductor, charges having a polarity opposite to that of the charged object are attracted. In a power generation device using electrostatic induction, a charge generated by electrostatic induction is caused by relatively moving a film that holds charge (hereinafter referred to as a “charged film”) and a counter electrode disposed opposite to the charged film. Power is generated by taking out

  FIG. 1 is an explanatory diagram of the principle of power generation using electrostatic induction by an electret. In this power generation method, as shown in FIG. 1, by utilizing the fact that induced charges are generated in the counter electrode by the electrostatic field formed by the electret, the area of the overlap between the electret and the counter electrode is changed by vibration or the like, An alternating current is generated in an external electric circuit. Electricity generation using electrets has attracted attention in recent years as so-called “Energy Harvesting” because it has a relatively simple structure and is advantageous in that it provides higher output than electromagnetic induction generation in the low frequency range.

Japanese Patent Laid-Open No. 9-43367 Japanese Patent No. 3484704 Japanese Patent No. 3830289 JP 2011-72070 A JP 2012-138514 A JP2013-59149A JP 2013-135544 A

  In an electronic device such as an electronic timepiece that can be carried by a user, it is desirable to use electric power generated by electrostatic induction as a power source and control the operation of the device in accordance with the carrying state to reduce power consumption. However, since the electronic device of Patent Document 1 is provided with an impact sensor or the like as the portable determination means, it is difficult to reduce the size of the device.

  On the other hand, in the electronic devices of Patent Documents 2 and 3, the output of the power generation device is monitored by a power generation detection circuit, and the portable state of the device is detected based on the power generation state. However, the power generation device in the electronic devices of Patent Documents 2 and 3 is an electromagnetic induction type AC power generation device, and the generated voltage is about several volts, whereas in the power generation device using the electrostatic induction by the electret described above. The generated voltage is as high as several tens of volts. For this reason, when the configurations of Patent Documents 2 and 3 are applied to a power generation apparatus using an electret, the power generation detection circuit may be destroyed by a high voltage generated by the electret. If a protection circuit is provided in the power generation detection circuit, the power generation detection circuit can be prevented from being destroyed. However, in this case, the voltage generated by the electret drops to the power supply voltage, so that the power generation efficiency is significantly deteriorated.

  In the electronic devices disclosed in Patent Documents 2 and 3, the portable state of the device is determined from the output voltage of the step-up / step-down circuit. With this configuration, it is necessary to operate the step-up / step-down circuit even when power generation is not performed. . For this reason, current consumption of the step-up / step-down circuit cannot be reduced, which hinders reduction of power consumption.

  Accordingly, an object of the present invention is to grasp the portable state of an electronic device that operates by generating electricity by electrostatic induction without increasing its size, and to improve the efficiency of power generation and power consumption.

  An electronic device according to the present invention includes a casing, a rotating member that is rotatable with respect to the casing, and a rotating part that rotates the rotating member. A rotation detection unit to detect, a power storage unit that accumulates power generated by the power generation unit, an operation unit that operates using power supplied from the power storage unit, and an operation of the operation unit according to the output from the rotation detection unit And a control unit for controlling.

  ADVANTAGE OF THE INVENTION According to this invention, it becomes possible to grasp | ascertain the portable state of an apparatus, without enlarging size, and to improve the efficiency of an electric power generation and electric power consumption about the electronic apparatus which operate | moves by generating electricity by electrostatic induction.

It is explanatory drawing of the principle of the electric power generation using the electrostatic induction by an electret. 1 is a block diagram of an electronic device 1. FIG. 2 is a schematic cross-sectional view showing an internal structure of a housing 10. FIG. 3 is a perspective view of a rotary weight 21, a rotary member 22, and a counter substrate 24. FIG. It is a figure which shows the example of the method of taking out the pattern of the charging film 23 and the electric power generation electrode 25, and an electric power generation current. It is a figure which shows another example of the method of taking out the pattern of the charging film 23 and the electric power generation electrode 25, and an electric power generation current. It is explanatory drawing of the spring contacts 31A and 31B of the rotation detection part 30A. It is a figure which shows the example of a circuit structure of 30 A of rotation detection parts. It is a block diagram of electronic equipment 1 '. 3 is a diagram illustrating an example of a circuit configuration of a charge detection unit 80. FIG. 3 is a block diagram of the electronic device 2. FIG. It is a figure which shows the example of arrangement | positioning of the power generation electrode 25, the power generation output terminal 251, the rotation detection electrode 33, and the rotation detection output terminal 331 in the form of FIG. 5B. It is a figure which shows another example of arrangement | positioning of the electric power generation electrode 25 and the rotation detection electrode 33. FIG. It is a figure which shows another example of arrangement | positioning of the electric power generation electrode 25 and the rotation detection electrode. It is a figure which shows another example of arrangement | positioning of the electric power generation electrode 25 and the rotation detection electrode. It is explanatory drawing of the electrical potential change of the rotation detection electrode 33 by an electret. 3 is a diagram illustrating an example of a circuit configuration of a rotation detection circuit 34. FIG. It is a figure which shows the example of the output waveform of the rotation detection electrode. 3 is a diagram illustrating an example of a circuit configuration of a charging unit 40. FIG. FIG. 6 is a diagram summarizing correspondence relationships between the power generation state of the power generation unit 20, the output waveform of the rotation detection circuit 34, and the state of the step-down circuit 42. It is a figure which shows the modification of arrangement | positioning of a rotation detection electrode. 3 is a block diagram of the electronic device 3. FIG. 3 is a diagram illustrating an example of a circuit configuration of a direct current removing unit 90. FIG. 5 is a flowchart of operation mode switching control by a control unit 70; 3 is a flowchart of motor drive control by a control unit 70. 3 is a flowchart of radio wave reception control by a control unit 70. It is a figure which shows the state which laid flat the timepiece 200 with which the metal band 210 was equipped. It is a figure which shows the state which carries timepiece 200 in an arm and has lowered | hung the arm.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In each embodiment, the same components are denoted by the same reference numerals, and the description thereof is omitted.

  FIG. 2 is a block diagram of the electronic device 1. The electronic device 1 includes a housing 10, a power generation unit 20, a rotation detection unit 30 </ b> A, a charging unit 40, a power storage unit 50, a clock display unit 60, and a control unit 70. In this specification, an example in which the electronic device is a portable electronic timepiece such as a wristwatch will be described. In this case, the housing 10 is a watch housing (casing). However, the electronic device of the present invention is not limited to an electronic timepiece.

  The electronic device 1 does not indirectly determine the portable state of the device from the power generation state of the power generation unit 20, but directly detects the movement of the rotating member of the power generation unit 20 by the rotation detection unit 30A to determine the portable state of the device. to decide. And according to the carrying state, the electronic device 1 controls the time display (the operation of the hands) by the clock display unit 60, or controls the operation of the charging unit 40.

  The power generation unit 20 includes a rotating member that is rotatable with respect to the housing 10, and performs power generation using electrostatic induction as the rotating member rotates. The energy source of the power generation unit 20 is kinetic energy widely present in the environment, such as human motion, machine vibration, and the like. The “vibration” here includes not only regular vibration but also irregular vibration. In addition, “rotation” in the present specification includes not only rotation in one direction but also rotational vibration and swinging motion.

  The rotation detection unit 30 </ b> A directly detects the rotation of the rotating member of the power generation unit 20 and outputs a signal corresponding to the result to the control unit 70. The charging unit 40 is a circuit for stepping down the electric power generated by the power generation unit 20 by a step-down circuit 42 (see FIG. 16A), which will be described later, and charging the power storage unit 50. The power storage unit 50 is a secondary battery that stores the power generated by the power generation unit 20, a large-capacity capacitor, or the like, and is charged by the charging unit 40 and functions as a power source for the electronic device 1. The clock display unit 60 is an example of an operation unit, and uses the power supplied from the power storage unit 50 to mechanically drive the hands to display the time.

  The control unit 70 determines the portable state of the electronic device 1 based on the output signal from the rotation detection unit 30A, and performs the overall operation of the electronic device 1 such as the charging unit 40 and the clock display unit 60 according to the result. Control. The control unit 70 includes a CPU, a RAM, a ROM, and the like, and executes each process described later with reference to FIGS. 21 to 23 by loading a program stored in the ROM into the RAM and executing it.

  FIG. 3 is a schematic cross-sectional view showing the internal structure of the housing 10. As shown in FIG. 3, a rotating shaft 11, a bearing 12, and an auxiliary substrate 13 are disposed inside the housing 10. The rotary shaft 11 is fixed to the center inside the housing 10 via upper and lower bearings 12. The auxiliary substrate 13 is disposed perpendicular to the rotation shaft 11 and is fixed to the side wall of the housing 10.

  FIG. 4 is a perspective view of the rotary weight 21, the rotary member 22, and the counter substrate 24. Inside the housing 10, a rotating weight 21, a rotating member 22, a charging film 23, a counter substrate 24 and a power generating electrode 25 are further disposed as the power generating unit 20. The power generation unit 20 outputs power generated between the charging film 23 and the power generation electrode 25 to the charging unit 40.

  The rotary weight 21 is a weight having a weight balance bias that is rotatable around the rotation shaft 11 in the direction of arrow C with respect to the housing 10. The rotary weight 21 is disposed on the upper side of the auxiliary substrate 13 inside the housing 10. The rotary weight 21 is rotationally driven when the user carries the electronic device 1 and performs an operation such as walking. In the electronic device 1, a spring contact 31 described later is disposed between the auxiliary substrate 13 and the rotary weight 21.

  The rotating member 22 is a disk-shaped member disposed below the auxiliary substrate 13. The rotating member 22 is rotated in the direction of the arrow C with respect to the rotating shaft 11 by its power when the rotating weight 21 is rotationally driven. The rotating member 22 is made of a known substrate material such as a metal or glass epoxy substrate. Instead of attaching the rotating weight 21 to the rotating shaft 11, a rotating weight 22 may be attached to the rotating member 22, and the rotating member 22 itself may be used as the rotating weight.

  The charging film 23 is an electret film disposed on the lower surface of the rotating member 22. The electret material used as the charging film 23 in the present embodiment includes, for example, electret materials such as silicon oxide (SiO 2) and a fluororesin material as a negatively charged material. Specifically, as an example of a negatively charged material, there is CYTOP (registered trademark), which is a fluororesin material manufactured by Asahi Glass. In addition, as the electret material, polymer materials such as polypropylene (PP), polyethylene terephthalate (PET), polyvinyl chloride (PVC), polystyrene (PS), polytetrafluoroethylene (PTFE), polyvinyldendifluoride ( PVDF), polyvinyl fluoride (PVF), and the like, and the above-described silicon oxide (SiO2), silicon nitride (SiN), and the like may be used as the inorganic material. In addition, a well-known charged film can be used.

  The counter substrate 24 is an example of a fixed substrate, and is fixed to the inner bottom surface of the housing 10 so as to face the rotating member 22. The counter substrate 24 is made of a known substrate material such as a metal or glass epoxy substrate.

  The power generation electrode 25 is an example of a counter electrode, and is disposed on the upper surface of the counter substrate 24 so as to face the charging film 23. The charging film 23 may be disposed on one of the rotating member 22 and the counter substrate 24, and the power generation electrode 25 may be disposed on the other of the rotating member 22 and the counter substrate 24. Therefore, contrary to the above, the charging film 23 may be disposed on the upper surface of the counter substrate 24, and the power generation electrode 25 may be disposed on the lower surface of the rotating member 22.

  FIG. 5A and FIG. 5B are diagrams showing examples of the pattern of the charging film 23 and the power generation electrode 25 and how to take out the generated current. First, FIG. 5A will be described. As shown in the upper part of FIG. 5A, the charging film 23 is formed by a plurality of radiating portions 23 ′ arranged at equal intervals in a circular region. The rotating shaft 11 is made of a conductive member, and the charging film 23 is connected to the rotating shaft 11 via an electrical contact for each radiating portion 23 '. However, the electrical wiring from the charging film 23 may be connected to the rotary shaft 11 after connecting the radiation portions 23 ′. Alternatively, when the rotating member 22 is a metal, each radiation portion 23 ′ is directly connected to the rotating shaft 11 through the substrate of the rotating member 22.

  On the other hand, as shown in the lower part of FIG. 5A, the power generation electrode 25 is also formed by a plurality of radiation portions 25 ′ arranged at equal intervals in a circular region. The charging film 23 and the power generation electrode 25 may be patterned into another shape different from the radial shape shown in FIG. 5A as long as the overlapping area increases or decreases when they rotate relative to each other.

  Outputs from the charging film 23 and the power generation electrode 25 are connected to a rectifier circuit 41 of the charging unit 40. The rectifier circuit 41 is a bridge type having four diodes, and outputs inputs from the charging film 23 and the power generation electrode 25 to a step-down circuit 42 described later via a smoothing circuit.

  When the rotating weight 21 fixed to the rotating shaft 11 is driven by the user's movement such as walking, the rotating member 22 fixed to the rotating shaft 11 rotates along with the rotation of the rotating weight 21, and the charged film The overlapping area between 23 (electret film) and the power generation electrode 25 increases or decreases. For example, if a negative charge is held on the inner surface of the charging film 23, the positive charge attracted to the power generation electrode 25 increases and decreases with the rotation of the rotating member 22, and an alternating current is generated between the charging film 23 and the power generation electrode 25. Occurs. By generating a current in this way, the power generation unit 20 performs power generation using electrostatic induction.

  Next, FIG. 5B will be described. The pattern of the charging film 23 in the upper part of FIG. 5B is the same as that shown in FIG. 5A, but no output terminal is required. In the example of FIG. 5A, the power generation current is extracted from the power generation electrode 25 ′ and the rotating shaft 11, whereas the example of FIG. 5B is different in that the power generation current is extracted from the adjacent power generation electrode 25 ′ (see Patent Document 7). (See the description of the principle in Fig. 9 and Fig. 10. Patent document 7 is cited and supplemented.) In this case, it is only necessary to take out the current from only the power generation electrode 25 on the stationary counter substrate 24, which is convenient because electrical connection of the rotating rotating member is unnecessary.

  Next, a rotation detection unit is provided separately from the power generation electrode 25 to detect rotation of the rotating member 22, that is, whether or not power generation is being performed, and the step-down circuit 42, the power storage unit 50, the clock display unit 60, and the like. An embodiment for controlling the operation will be described.

  6A and 6B are explanatory diagrams of the spring contacts 31A and 31B of the rotation detection unit 30A. In these drawings, among the components in the housing 10, the rotary shaft 11, the auxiliary substrate 13, the rotary weight 21, and the spring contacts 31A and 31B are viewed from above.

  The rotation detection unit 30A has a spring contact 31A or a spring contact 31B that comes into contact with the rotary weight 21 when the rotary weight 21 rotates. The contact state between the spring contacts 31 </ b> A and 31 </ b> B and the rotary weight 21 varies depending on the position of the rotary weight 21. Therefore, the rotation detection unit 30A differs depending on whether the rotary weight 21 and the spring contacts 31A, 31B are in contact or not so that the operation state of the rotary weight 21 can be grasped from the signals output through the spring contacts 31A, 31B. Output a signal. With such a rotation detection unit 30A, the amount of current consumption required for detection is small and the structure is simple, so the size of the electronic device 1 is not increased. Further, when the rotating weight 21 and the rotating member 22 are not integrated, and a speed increasing wheel train mechanism for increasing the speed of the rotation of the rotating weight 21 and transmitting it to the rotating member 22 is provided between them, Since the torque is larger than that of the rotating member 22, the influence of the mechanical load can be suppressed by bringing the spring contact 31 </ b> A or 31 </ b> B into contact with the rotating weight 21 instead of the rotating member 22.

  It is possible to grasp the operating state of the rotary weight 21 by providing a conductive portion with the spring contacts 31A and 31B on the rotary member 22, but in order to generate power efficiently, a gap between the charging film 23 and the power generation electrode 25 is provided. It is necessary to strictly manage the gap, and the gap may change due to the pressing force when the spring contacts 31A and 31B come into contact with the rotating member 22. On the other hand, the above-described gap management is not necessary for the rotary weight 21, and since it is a metal, it is easy to conduct electricity. For this reason, the spring contacts 31 </ b> A and 31 </ b> B are more preferably connected to the rotary weight 21.

  There are two types of spring contact 31: single contact and double contact. 6A shows the arrangement position of the single-contact spring contact 31A, and FIG. 6B shows the arrangement position of the double-contact spring contact 31B. Hereinafter, the operation in each configuration will be described. In the following description, the power supply voltage is referred to as Vss and the power supply ground voltage is referred to as Vdd.

  FIG. 7A and FIG. 7B are diagrams illustrating an example of a circuit configuration of the rotation detection unit 30A. FIG. 7A shows an example in which a single contact spring contact 31A is used.

  As illustrated in FIG. 7A, the rotation detection unit 30 </ b> A includes a spring contact 31 </ b> A and a resistor 32, and outputs a different signal to the control unit 70 depending on whether the rotary weight 21 is rotated. The rotary shaft 11 is electrically connected to Vdd by applying another spring or the like, and the rotary weight 21 connected to the rotary shaft 11 is also set to the potential of Vdd. The input signal to the control unit 70 is a potential of Vss through the resistor 32 when the spring contact 31A and the rotary weight 21 are not in contact, and when the spring contact 31A and the rotary weight 21 are in contact, the rotary weight 21 is supplied. The potential becomes Vdd. When the rotary weight 21 is stopped, both a state where the spring contact 31A and the rotary weight 21 are in contact and a state where they are not in contact are conceivable. Therefore, by detecting that the potential of the input signal changes from Vdd to Vss or from Vss to Vdd, the control unit 70 determines whether or not the rotary weight 21 is rotating. The control unit 70 determines that the power generation is completed when a signal indicating that the rotary weight 21 is rotating is not input from the rotation detection unit 30A for a certain period of time, or when the input voltage from the rotation detection unit 30A is not changed, and charging is performed. The operation of the unit 40 is stopped. Note that Vss and Vdd may be interchanged according to the configuration of the rotation detection unit 30A.

  FIG. 7B is a diagram illustrating an example of a circuit configuration of the rotation detection unit 30A using the double contact spring contact 31B. The difference from FIG. 7A is the connection configuration of the spring contact 31B, in that the rotary weight 21 conducts Vdd and the input signal to the control unit 70.

  One of the two spring contacts 31B arranged in parallel as shown in FIG. 6B is connected to Vdd, and the other is connected to the rotation detection unit 30A of the auxiliary board 13. When the rotating weight 21 rotates and contacts the two spring contacts 31B, the rotating weight 21 short-circuits the two spring contacts, so that Vdd is input to the rotation detecting unit 30A of the auxiliary substrate 13. Then, the input signal to the control unit 70 that has been the potential of Vss through the resistor 32 is changed to Vdd so that it can be detected that the rotary weight 21 has rotated. In the form of FIG. 7 (B), unlike FIG. 7 (A), it is not necessary to connect the rotary weight 12 to Vdd, and another contact spring is not brought into contact with the rotary shaft 11, so that the rotation is correspondingly performed. The contact resistance in the member 22 can be reduced.

  When the position of the spring contact 31 is close to the outer edge 21 </ b> E of the rotary weight 21, the spring contact 31 is rotated when the rotary weight 21 rotates compared to when the spring contact 31 is positioned near the axis center. Therefore, the contact resistance increases and the rotational force of the rotary weight 21 decreases. Therefore, it is preferable that the spring contact 31 is disposed near the axis center of the rotary weight 21. In other words, the spring contact 31 is preferably brought into contact with the rotating weight 21 at a position closer to the rotating shaft 11 of the rotating weight 21 than the outer edge 21 </ b> E of the rotating weight 21 in the radial direction of the rotating weight 21. The vicinity of the center of the rotary weight 21 has the largest torque, and the influence of the mechanical load on the spring contact 31 can be suppressed.

  A plurality of spring contacts 31 are arranged in the circumferential direction at equal angles around the rotation axis 11 of the rotary weight 21 according to the size of the central angle of the rotary weight 21. Thus, by arranging the plurality of spring contacts 31 evenly in the circumferential direction, the response of detecting the rotation state of the rotary weight 21 can be accelerated. However, if the number of the spring contacts 31 is too large, a load is applied to the rotation of the rotary weight 21, and therefore 360 degrees / (center angle of the rotary weight) (pieces) is preferable. Also, the central angle of the rotary weight 21 is ideally about 120 degrees from the axis center in consideration of the rotation efficiency. For this reason, the number of the spring contacts 31 is ideally three, and it is preferable that each spring contact 31 is equally arranged every 120 degrees.

  If three or more spring contacts 31 cannot be arranged due to space constraints or cost reduction of the auxiliary substrate 13, if the spring contacts 31 are arranged near the stop position of the rotating weight 21, vibration of the small rotating weight 21 is also detected. It becomes easy to do. Hereinafter, an example in which the present embodiment is applied to a wristwatch will be described.

  When the watch 200 equipped with the metal band 210 is laid flat as shown in FIG. 24, the metal band 210 is often folded so that the watch face face is directed upward. In this case, due to the structural reason of the metal band 210, the timepiece dial face does not become horizontal, but tilts in the 12 o'clock direction or 6 o'clock direction of the timepiece. Therefore, the rotating weight 21 also stops at the center of the circular arc at 12:00 or 6 o'clock. An arrow 300 indicates the direction of gravity. The arrangement position of the spring contact 31 'is a position where the center of the arc of the rotating weight 21 is not in contact with the rotating weight 21 when the arc center of the rotating weight 21 is stopped at 12 o'clock or 6 o'clock, but is in contact with the rotating weight 21 even if it moves even a little. This makes it possible to detect the watch's carrying state with high sensitivity.

  In the state where the watch 200 is carried around the arm and the arm is lowered as shown in FIG. 25 (for example, while walking), the center of the arc of the rotary weight 21 is 9 o'clock in the case of right-hand carry and 3 o'clock in the case of left-hand carry. Is often located. Again, the arrow 300 indicates the direction of gravity. Therefore, the spring contact 31 ″ is positioned when the rotating weight 21 moves even a little without contacting the rotating weight 21 when the arc center of the rotating weight 21 is stopped at the 3 o'clock or 9 o'clock position. By setting the contact position, it is possible to detect the carrying state of the watch sharply.

  Further, when it is not desired to activate a heavy load function such as a step-down circuit when there is no rotation of the rotating weight 21, a spring contact 31 ″ is arranged at a position where the rotating weight 21 does not come into contact with a slight movement. Thus, the detection performance can be lowered with respect to the carrying state of the watch. In other words, the detection performance for the carrying state of the watch can be selected based on the separation distance between the rotary weight 21 and the position where the spring contact 31 is disposed at the position where the stationary stop is performed.

  Up to now, the method of detecting the operation state of the rotary weight 21 by bringing the spring contact 31 into contact with the rotary weight 21 has been shown. However, the portion contacting the rotary weight 21 is non-conductive instead of the spring contacts 31A and 31B. A method may be used in which a push switch is used to push the switch when the rotary weight 21 passes immediately above the switch. Further, the operation of the rotary weight 21 may be detected using light, magnetism, or the like instead of the spring contact 31A or 31B. In this case, since the load due to the contact is not applied to the rotary weight 21, the power generation amount is not reduced.

  FIG. 8 is a block diagram of the electronic apparatus 1 ′. The electronic device 1 ′ is charged in addition to the case 10, the power generation unit 20, the rotation detection unit 30A, the charging unit 40, the power storage unit 50, the clock display unit 60, and the control unit 70 similar to the electronic device 1 illustrated in FIG. A charge detection unit 80 is provided between the unit 40 and the power storage unit 50.

  FIG. 9 is a diagram illustrating an example of a circuit configuration of the charge detection unit 80. The charge detection unit 80 is a circuit for determining whether or not the power generation is completed, and includes a resistor 81 and a voltage monitor unit 82 as shown in FIG. In the electronic apparatus 1 ′, the control unit 70 monitors the voltage value generated in the resistor 81 by the voltage monitor unit 82, thereby grasping the charging current amount to the power storage unit 50. Then, the control unit 70 determines that the power generation is completed when the amount of charging current to the power storage unit 50 is equal to or less than the reference value, and operates the step-down circuit 42 of the charging unit 40 to suppress power consumption. End. Further, the control unit 70 determines that the power generation is completed not only when the amount of charging current but also the signal voltage at the rotation detection unit 30A does not change for a certain time or more, and terminates the operation of the step-down circuit 42. May be.

  FIG. 10 is a block diagram of the electronic device 2. The electronic device 2 includes a housing 10, a power generation unit 20, a rotation detection unit 30 </ b> B, a charging unit 40, a power storage unit 50, a clock display unit 60, and a control unit 70. The configuration of the electronic device 2 is the same as the configuration of the electronic device 1 shown in FIG. 2 except for the rotation detection unit 30B. The rotation detection unit 30 </ b> B includes a rotation detection electrode 33 and a rotation detection circuit 34 for detecting a voltage generated by electrostatic induction according to the rotation of the rotation member 22.

  In the rotation detection unit 30A of the electronic device 1, since the spring contact 31 becomes a load when the rotary weight 21 moves, the power generation efficiency is deteriorated. Therefore, in the electronic device 2, instead of providing the spring contact 31, the rotation detection electrode 33 is disposed on the counter substrate 24 of the power generation unit 20 together with the power generation electrode 25. In other words, in the electronic device 2, the rotation detection electrode 33 that outputs a signal synchronized with the power generation electrode 25, which is a system different from the power generation electrode 25, is provided on the power generation substrate (counter substrate 24) of the electret. And according to the output signal of the rotation detection electrode 33, the control part 70 recognizes the portable state of the electronic device 2, and controls operation | movement of an apparatus. If the rotation detection electrode 33 is provided on the counter substrate 24, it is not necessary to secure a new space for the rotation detection electrode 33, and the state of power generation by the electret can be instantaneously recognized from the rotation of the rotation member 22.

  The rotation detection electrode 33 is provided on a member of the rotating member 22 and the counter substrate 24 on which the power generation electrode 25 is provided. Therefore, the power generation electrode 25 and the rotation detection electrode 33 may be arranged on the rotating member 22 instead of the counter substrate 24.

  FIG. 11A is a diagram illustrating an arrangement example of the power generation electrode 25, the power generation output terminal 251, the rotation detection electrode 33, and the rotation detection output terminal 331 in the form of FIG. 5B. FIG. 11B is an enlarged view of the wiring portion in FIG. 11A, and FIG. 11C is an enlarged view of the portion where the rotation detection electrode is arranged in FIG. In FIG. 11A, the outer edge 22 </ b> E of the rotating member 22 is overlapped with a broken line on the top view of the counter substrate 24. As shown in FIG. 11A, two power generation electrodes 25, power generation output terminals 251, a rotation detection electrode 33, and two rotation detection output terminals 331 are provided on the upper surface of the counter substrate 24. Hereinafter, the two power generation electrodes 25 are also referred to as Vin1 and Vin2, respectively, and the two rotation detection electrodes 33 are also referred to as VinS1 and VinS2, respectively. The two power generation output terminals 251 are also referred to as Vin11 and Vin21, respectively, and the two rotation detection output terminals 331 are also referred to as VinS11 and VinS21, respectively.

  Vin1 and Vin11 are electrically connected by a wire 301, Vin2 and Vin21 are electrically connected by a wire 302, VinS1 and VinS11 are electrically connected by a wire 303, and VinS2 and VinS21 are electrically connected by a wire 304, respectively. The electric charges generated by Vin1 and Vin2 are carried to the charging unit 40 via Vin11 and Vin21 and used for the operation of the electronic device 1. On the other hand, the electric charges generated by VinS1 and VinS2 are carried to the rotation detection circuit 34 via VinS11 and VinS21 and used for detecting the rotation of the rotating member 22.

  VinS1 generates voltage in synchronization with Vin1, and VinS2 generates voltage in synchronization with Vin2. Thereby, by monitoring the voltage waveforms of VinS1 and VinS2, it is possible to grasp the power generation status due to the rotation of the rotating member 22. Furthermore, in order to make this synchronization more accurate, it is preferable to arrange the side surface of the rotation detection electrode 33 on the extended line of the side surface of the power generation electrode 25. The side surface here refers to a rotating member 22 centering on the rotating shaft 11 or a boundary surface in the radial direction of the counter substrate 24.

  This will be described in detail with reference to FIG. The side surface AA of VinS1 (33) is on the extension line of side surface A of Vin1 (25), the side surface BB of VinS1 (33) is on the extension line of side surface B of Vin1 (25), and the extension line of side surface C of Vin2 (25) The side surface CC of VinS1 (33) is arranged on the extended line of the side surface D of Vin1 (25), and the side surface DD of VinS1 (33) is arranged. As a result, the proximity distances of Vin1 and VinS1 with respect to the charging film 23 of the rotating member 22 are equal to each other, so that the timing at which charges are generated coincides with each other, and the power generation waveform of VinS1 and the rotation detection waveform of Vin1 are precisely synchronized. . That is, the side surface of the rotation detection electrode 33 is preferably parallel to the side surface of the power generation electrode 25.

  Further, the rotation detection electrode 33 is disposed not at the middle of the radiating portion 25 ′ of the power generation electrode 25 (intermediate point between the rotation center of the rotating member 22 and the outer edge 22 E) but at the inner end or the outer end of the radiating portion 25 ′. It is preferable. That is, the rotation detection electrode 33 is preferably disposed in the vicinity of the rotation shaft 11 or along the outer edge 22 </ b> E of the rotation member 22. This is because if the rotation detection electrode 33 is provided at a midpoint between the rotation center of the rotation member 22 and the outer edge 22E, the power generation electrode 25 is divided and the power generation efficiency is lowered. Further, if the rotation detection electrode 33 is disposed in the middle of the radiation portion 25 ′, the divided power generation electrodes 25 need to be connected to each other through a through hole, which is also inconvenient on the wiring. The rotation detection electrode 33 only needs to detect a change in potential and does not require a large amount of current. Therefore, the rotation detection electrode 33 is near the rotation center having a small power generation area and a small contribution to power generation, or the outer edge 22E of the rotation member 22. It is suitable to arrange in the vicinity.

  FIG. 12A is a diagram illustrating another arrangement example of the power generation electrode 25 and the rotation detection electrode 33. FIG. 12A shows an example where the number of rotation detection electrodes 33 is one. One rotation detection electrode 33 is disposed in the vicinity of the rotation shaft 11 of the radiating portion 25 ′, and a signal generated there is input to the rotation detection output terminal VinS 11 through a wiring. Since the vibration state can be detected with only one rotation detection electrode 33, the rotation detection unit 30 </ b> B may have only one rotation detection electrode 33. However, in order to detect the vibration state of the rotating member 22 with high accuracy, the rotation detection unit 30B preferably includes a plurality of rotation detection electrodes 33. If there are two rotation detection electrodes 33, the rotation state of the rotating member 22 can be detected more precisely. The reason for this will be described below.

  The power generation waveform of the rotation detection electrode 33 is due to the charge generated when the charging film 23 comes close to the rotation detection electrode 33 due to the rotation of the rotating member 22. When the charging film 23 comes close to VinS1, the power generation waveform of VinS1 is Vss. To Vdd direction. On the other hand, since the charging film 23 starts to move away from VinS2, the power generation waveform of VinS2 changes from the Vdd direction to Vss. After a while, when the charging film 23 starts to move away from VinS1, the power generation waveform of VinS1 changes from the Vdd direction to Vss. On the other hand, since the charging film 23 approaches VinS2, the power generation waveform of VinS2 changes from Vss to Vdd direction. Change. As described above, the approaching state of the charging film 23 to the rotation detection electrode 33, that is, the rotation state of the rotation member 22 can be detected alternately from the power generation waveforms by the two rotation detection electrodes 33.

  When the number of rotation detection electrodes 33 is one, the vibration state of the rotation member 22 cannot be detected from the power generation waveform in a period in which the rotation detection electrode 33 is not in proximity to the charging film 23. In the case of two, since the rotation can be continuously detected by adding, for example, the two generated power generation waveforms, the period of the rotation detection of the rotation member as described above does not occur, and the rotation detection can be performed. Accuracy is improved. Furthermore, if the size of the two rotation detection electrodes 33 is changed to make a difference between the power generation amounts of the two, it is also possible to determine the rotation direction of the rotation member 22 from the output voltage value of the rotation detection unit 30B. .

  FIG. 12B (A) is a diagram illustrating another arrangement example of the power generation electrode 25 and the rotation detection electrode 33. FIG. 12B (B) is a partially enlarged view of FIG. 12B (A). There are two major differences from FIG. The first point is that the rotation detection output terminals VinS11 and VinS21 are disposed at the position where the power generation output terminals Vin11 and Vin21 are disposed, and the power generation output terminal Vin11 is disposed at the position where the rotation detection output terminal VinS11 is disposed. The power generation output terminal Vin21 is arranged on the VinS21 side. The second point is that Vin11 and Vin1 and Vin21 and Vin2 are connected by wirings 301 and 302 through through holes, respectively, while VinS1 and VinS2 are arranged near the outer edge 22E, and VinS1 and VinS11, VinS2 and VinS21 are connected at short distances by wirings 303 and 304, respectively.

  In FIG. 11A, the wiring 304 on the back surface side of the counter substrate 24 crosses the wiring 301 in a top view, and FIG. The following situation occurs in the arrangement structure of FIG. The rotation detection electrode VinS1 and the power generation electrode Vin1 are arranged in the same radiating section, and when the rotating member 20 rotates, the rotation detection electrode VinS1 and the power generation electrode Vin1 are charged to the same polarity by approaching the charging film 23 at the same timing. The voltage waveform with 303 changes in the same Vdd direction, and the potential difference between them is small. At this time, since the charging film 23 moves away from the rotation detection electrode VinS2, the potential of VinS2 changes from Vdd direction to Vss, and the wiring 304 also changes to the same potential. That is, since the wiring 301 changes to the Vdd direction and the wiring 304 changes to Vss, a large potential difference is generated between the wirings 301 and 304. Further, the gap between the wirings 301 and 304 in the top view is only the thickness of the counter substrate 24. The electric current generated by electrostatic induction power generation is much less than that of a general electronic circuit. Therefore, if a wiring with a large potential difference is close to the wiring 301, the electric charge is affected and the amount of generated current may be reduced. There is sex.

  Therefore, with the configuration shown in FIG. 12B (A), the wiring 301 crosses the wiring 303 and the wiring 302 crosses the wiring 304 in a top view, but they are charged to the same polarity in the vicinity of the charging film at the same timing. Since the potential difference is small, the mutual influence can be reduced.

  FIG. 12C (A) is a diagram showing still another example of arrangement of the power generation electrode 25 and the rotation detection electrode 33. FIG. 12C (B) is a partially enlarged view of FIG. 12C (A). In the arrangement example of FIG. 12B (A), the wiring 301 and part of the wiring 302 are through holes, so that the impedance slightly increases. On the other hand, in the arrangement example of FIG. 12C (A), a through hole is provided only in the rotation detection electrode 33 that is not related to power generation. 11A differs from FIG. 11A in that the wiring 302 connects Vin21 and Vin2 without passing through the through-hole, and VinS2 divided in the vicinity of the outer edge 22E is arranged so as to sandwich the wiring 302. This is a point where the divided VinS2 and VinS21 are connected by a wiring 304 through a through-hole installed in a non-contributing part. With such a configuration, since it is not necessary to use a through hole for the wiring 302, it is possible to prevent a decrease in the generated current due to the wiring impedance, and to connect the through hole for the wiring 304 with the radiation portion 25 for power generation. Because it is not installed in ', the maximum power generation area can be secured. Therefore, from the viewpoint of power generation efficiency, the arrangement shown in FIG. 12C (A) is the most preferable among the four arrangement examples shown in FIGS. 11 (A) to 12C (A).

  FIG. 13A and FIG. 13B are explanatory diagrams of the potential change of the rotation detection electrode 33 by the electret. In the state shown in FIG. 13A, since the electret (charging film 23) is separated from the rotation detection electrode 33, the potential of the rotation detection electrode 33 remains V1. On the other hand, in the state shown in FIG. 13B, the electret (charged film 23) is close to the rotation detection electrode 33, and the rotation detection electrode 33 is affected by the electret. It becomes higher in the + direction than V1.

  FIG. 14A and FIG. 14B are diagrams illustrating an example of the circuit configuration of the rotation detection circuit 34. The rotation detection circuit 34 is a circuit for detecting an input signal from the rotation detection electrode 33, and outputs different binary signals depending on whether or not the potential of the signal exceeds a threshold value.

  As shown in FIG. 14A, the rotation detection circuit 34 includes a protection circuit including a diode 35, a resistor 36, and a comparator 37. The signal from VinS1 is biased by connecting the power supply V1 via the resistor 36, and is input to the comparator 37 via a protection circuit disposed between the power supply Vss and the ground voltage Vdd. The comparator 37 also receives a potential V2 that serves as a threshold for determining the presence or absence of vibration from the potential of Vin1. The comparator 37 compares the potential of VinS1 with V2, and outputs the result as a binary value. Note that although not shown, the signal from VinS2 is also output as a binary comparison result with the potential V2 by the same circuit as FIG. Here, the potentials V1 and V2 satisfy the relationship of Vdd> V2> V1> Vss.

  FIG. 15A to FIG. 15D are diagrams illustrating examples of output waveforms of the rotation detection electrode 33.

  FIG. 15A shows an input waveform from VinS1 to rotation detection circuit 34, and FIG. 15B shows a waveform after input from VinS1 and passing through the protection circuit of rotation detection circuit 34. As shown in FIG. 15B, the protection circuit cuts a portion of the input signal that exceeds the power supply potential. FIG. 15C shows an output waveform of the comparator 37 (that is, the rotation detection circuit 34). Since the output of the comparator 37 is determined based on the potential V2 as a threshold, the output waveform is a rectangular wave depending on whether or not the input voltage from VinS1 exceeds the threshold V2. Since the input waveform from VinS1 is a sine wave, as can be seen by comparing FIG. 15A and FIG. 15C, the time interval from the fall to the rise in the output waveform of the comparator 37 is the output of VinS1. It is slightly shorter than the time interval from rising to falling in the waveform.

  FIG. 15D shows an output waveform from the rotation detection circuit 34 for VinS2. Since the waveforms of the voltages generated at VinS1 and VinS2 are 180 degrees out of phase with each other, the output waveform from the rotation detection circuit 34 is similarly 180 degrees out of phase between VinS1 and VinS2. If the rotating member 22 is rotating, a waveform as shown in FIG. 15C and FIG. 15D is output from the rotation detecting circuit 34. If the rotating member 22 is not rotating, the waveform is output from the rotation detecting circuit 34. No change in potential occurs in the output waveform. Therefore, by monitoring the output from the rotation detection circuit 34 for VinS1 and VinS2 shown in FIGS. 15C and 15D, the rotation state of the rotary member 22 of the power generation unit 20, that is, the power generation state of the electret can be determined. Recognize.

  As shown in FIG. 14B, instead of using the comparator 37, the potential of V1 may be set to Vss and an inverter 370 or the like may be used.

  FIG. 16A to FIG. 16D are diagrams illustrating examples of circuit configurations of the charging unit 40.

  As illustrated in FIG. 16A, the charging unit 40 includes a rectifier circuit 41 and a step-down circuit 42. The AC voltage generated in the power generation unit 20 is full-wave rectified by the rectifier circuit 41, stepped down by the step-down circuit 42, and output to the power storage unit 50.

  16B to 16D show different circuit configurations of the step-down circuit 42, respectively. The step-down circuit 42 is composed of a plurality of sets of capacitors capable of switching series-parallel connections. Here, an example is shown in which the step-down circuit 42 is configured with two sets of capacitors of Ca1 to Ca10 and Cb1 to Cb10 connected in series and parallel to each other. FIG. 16B shows a state where the step-down circuit 42 is not operating. At this time, each capacitor of the step-down circuit 42 is connected in parallel to the power storage unit 50. On the other hand, FIGS. 16C and 16D correspond to the state where the step-down circuit 42 is operating.

  The step-down circuit 42 is switched to one of the states shown in FIGS. 16B to 16D in accordance with the period of the output waveform from the rotation detection electrode 33 under the control of the control unit 70. For example, when rotation of the rotating member 22 (that is, power generation of the power generation unit 20) is detected by the rotation detection unit 30B, the step-down circuit 42 is (B) → (C) → (B) → (D) → (B). It is switched in the order of (C) →. That is, the state shown in FIG. 16B without power generation is switched to the state shown in FIG. 16C, and Cb1 to Cb10 connected in series are charged with the DC voltage Vin to return to the state shown in FIG. Then, the electric charges of Cb1 to Cb10 connected in parallel are caused to flow to the power storage unit 50, and then the state of FIG. 16D is switched to charge Ca1 to Ca10 connected in series with the DC voltage Vin. The operation of returning the state of B) and flowing the charges of Ca1 to Ca10 connected in parallel to the power storage unit 50 is repeated.

  This is because it takes time to let the electric charge stored in the capacitor flow to the power storage unit 50, so that the other set of capacitors can be charged while one set of capacitors is discharged. is there. Since both the power generation electrode 25 and the rotation detection electrode 33 are provided on the radiating portion 25 ′ of the counter substrate 24, the voltage change periods of both coincide with each other. For this reason, if the connection of the capacitor is switched in accordance with the period of the output waveform from the rotation detection circuit 34, it is possible to always put electric charge into one of the capacitors in accordance with the peak of the voltage change of the power generation electrode 25. Thereby, efficient charging from the power generation unit 20 to the power storage unit 50 can be performed.

  FIGS. 17A to 17D are diagrams summarizing correspondence relationships between the power generation state of the power generation unit 20, the output waveform of the rotation detection circuit 34, and the state of the step-down circuit 42. FIG. 17A shows an output waveform of Vin1-Vin2 from the power generation unit 20 (power generation electrode 25), and FIG. 17B shows the waveform after passing through the rectifier circuit 41 of the charging unit 40. The waveform at Vin shown in FIG. FIGS. 17C and 17D show the output waveforms from the rotation detection circuit 34 for VinS1 and VinS2, which are the same as those in FIGS. 15C and 15D, respectively. FIG. 17E shows the state of the step-down circuit 42 shown in FIGS. 16B to 16D.

  Instead of switching the state of the step-down circuit 42 in synchronization with the signal from the rotation detection electrode 33, the switching timing may be changed using a delay circuit or the like with reference to the edge of the signal from the rotation detection electrode 33. Good.

  FIGS. 18A and 18B are diagrams showing a modification of the arrangement of the rotation detection electrodes. In these drawings, as in FIG. 3, a schematic cross section of the internal structure of the housing 10 is shown. The rotation detection electrode 33 is not necessarily provided on the same surface as the power generation electrode 25 (in the above description, the upper surface of the counter substrate 24).

  For example, as shown in FIG. 18A, the rotation detection electrode 33 'may be disposed on the upper surface of the rotating member 22, that is, the surface opposite to the surface on which the charging film 23 is formed. In this case, for example, if another charge film 38 for rotation detection is provided on the lower surface of the auxiliary substrate 13 facing the rotation detection electrode 33 ′, an electrostatic induction phenomenon between the rotation detection electrode 33 ′ and the charge film 38. Thus, the rotation of the rotating member 22 can be detected. Further, the arrangement of the rotation detection electrode 33 ′ and the other charging film 38 for rotation detection may be interchanged. With this configuration, the current generated by the rotation detection electrode 33 ′ is placed on the auxiliary substrate 13. It is easy to guide to the rotation detection circuit 34 through the electric wiring, and the impedance of the electric wiring can be lowered.

  Further, as shown in FIG. 18B, another charging film 38 for detecting rotation may be arranged on another wheel train that is motively connected to the rotating shaft 11 of the rotating member 22. FIG. 18B shows an example in which the charging film 38 is arranged on the upper surface of another rotating member 16 that rotates around the rotating shaft 15 via the gear 14 installed on the rotating shaft 11. In this case, the rotation detection electrode 33 ′ may be provided on the lower surface of the substrate 17 facing the rotation member 16. With this configuration, since the signal generated at the rotation detection electrode 33 ′ can be guided to the rotation detection unit 30 by the wiring of the substrate 17, the wiring length can be minimized and the influence of noise is reduced. be able to. If there is no problem even if the above-described wiring length is increased, the arrangement of the charging film 38 and the rotation detection electrode 33 'may be interchanged. In any of the above cases, the shapes of the rotation detection electrode 33 ′ and the charging film 38 are not particularly limited.

  In addition, although not shown, the rotation detection electrode 33 is disposed so as to face the charging film 23 and generate a rotation detection signal, so that the rotation member 22 or the counter substrate 24, the rotation shaft 11, and the like The rotation detection electrode 33 may be disposed in the dead space. In this case, there is an advantage that the power generation amount of the power generation unit 20 can be prevented from decreasing by the area of the rotation detection electrode 33.

  FIG. 19 is a block diagram of the electronic device 3. The electronic device 3 includes a housing 10, a power generation unit 20, a rotation detection unit 30C, a charging unit 40, a power storage unit 50, a clock display unit 60, a control unit 70, and a direct current removal unit 90. The configuration of the electronic device 3 is the same as the configuration of the electronic device 2 shown in FIG. 10 except for the rotation detection unit 30C and the direct current removal unit 90.

  In the electronic device 3, the rotation detection unit 30 </ b> C is electrically connected to the power generation unit 20 via the direct current removal unit 90, extracts an alternating current component of the current generated in the power generation unit 20, and detects a voltage change thereof. The rotation of the rotating member 22 (power generation by the power generation unit 20) is detected. The voltage generated by the electrostatic induction is often a high voltage, and the output voltage from the power generation unit 20 exceeds the withstand voltage of the circuit of the rotation detection unit 30C, and the IC may be destroyed. Therefore, in the electronic device 3, by providing the direct current removal unit 90 between the power generation unit 20 and the rotation detection unit 30C, the direct current component of the current flowing from the power generation unit 20 to the rotation detection unit 30C is removed, thereby preventing the destruction of the IC. To do. In the electronic device 3, unlike the electronic device 2, the rotation detection electrode 33 is not disposed on the counter substrate 24. Therefore, the power generation amount of the power generation unit 20 does not decrease by the area of the rotation detection electrode 33, and the electronic device It is possible to improve the power generation capacity of the power generation unit 20 rather than 2.

  FIG. 20 is a diagram illustrating an example of a circuit configuration of the direct current removing unit 90. The direct current removing unit 90 is a general high-pass filter circuit, and removes direct current flowing from the power generation unit 20 into the rotation detection unit 30C. The relationship between the cut-off frequency of the high-pass filter circuit and the circuit element constant can be obtained from the equation f = 1 / (2πCR). Here, f is a cutoff frequency, C is a capacitance of a capacitor, and R is a resistance. Assuming that the lowest frequency of the electret is 10 Hz, for example, the frequency f may be set to f = 5 Hz below that frequency, and the capacitance C and the resistance R may be C = 330 pF, R = 96.50646593 MΩ. With such circuit constants, it is possible to remove components of 5 Hz or less from the input signal to the rotation detection unit 30C. Further, the capacitor used in the present embodiment needs to have a high withstand voltage characteristic in order to cope with an input high voltage signal. However, if the integrated circuit has a high withstand voltage characteristic, the manufacturing cost increases. Therefore, the DC removing unit 90 may be an integrated circuit integrated with the rotation detecting unit 30C. However, only the capacitor is not an integrated circuit, but a separate component is used and a component with a high withstand voltage of the applied voltage is used. With this configuration, the manufacturing cost can be reduced.

  Below, control of operation | movement of the timepiece display part 60 by the control part 70 according to the detection result of rotation detection part 30A, 30B, 30C is demonstrated. This control is common to all the electronic devices 1, 1 ', 2, and 3. The following flows shown in FIG. 21 to FIG. 23 are executed by the CPU in the control unit 70 in accordance with a program stored in advance in the ROM in the control unit 70.

  FIG. 21 is a flowchart of operation mode switching control by the control unit 70. The clock display unit 60 operates in any one of a normal mode in which the hands are moved as usual and the time is displayed, and a power saving mode in which power consumption is reduced by performing timekeeping processing internally without moving the hands. . Therefore, the control unit 70 controls the operation mode of the timepiece display unit 60 between the normal mode and the power saving mode with less power consumption than the normal mode according to the output from the rotation detection unit by the operation mode switching control described below. Set to either.

  When the electronic device is turned on, first, the control unit 70 performs a rotation time during which the rotation state of the rotation member 22 continues and a non-rotation time during which the rotation member 22 does not rotate (non-rotation state). Is initialized to 0, and the power saving flag indicating that the electronic device is in the power saving mode is turned off (step S11).

  When the power saving flag is off (Yes in step S12), the control unit 70 determines that the clock display unit 60 is in the normal mode, and causes the clock display unit 60 to perform timekeeping processing and hand movement processing ( Step S13). On the other hand, when the power saving flag is on (No in step S12), the control unit 70 determines that the clock display unit 60 is in the power saving mode, and causes the clock display unit 60 to execute only the time counting process (step S14). ). The time counting process here is a process for calculating and obtaining time data. The hand movement process refers to a process of driving the motor to move the pointer to indicate the hour, minute, second based on the time data calculated in the time counting process. That is, when the power saving mode flag is turned on, the time calculation is continuously performed, but the motor driving for displaying the time with the pointer is not performed, so that the current consumption can be reduced. When the power saving flag shifts from on to off, the hands are moved to move the hour, minute and second hands so as to coincide with the current time obtained in the time counting process.

  And when it becomes the monitor timing of the rotation state by rotation detection part 30A, 30B, 30C (it is Yes at step S15), the control part 70 performs the following processes, and when it is not a monitor timing (it is No at step S15). The process returns to step S12. At the monitor timing, the control unit 70 determines whether or not the rotating member 22 is in a rotating state from the outputs of the rotation detecting units 30A, 30B, and 30C (step S16). For example, in the electronic device 2, the control unit 70 determines whether or not there is an input of the rotation detection electrode VinS.

  When the outputs of the rotation detection units 30A, 30B, and 30C indicate the rotation state (Yes in step S16), the control unit 70 determines that the electronic device is in the portable state and increases the rotation time counter. At the same time, a non-rotation time counter is initialized (step S17). Here, when the rotation state of the rotating member 22 has not continued for a certain period of time (No in step S18), the process returns to step S12. Only when the rotation state continues for a certain time (Yes in Step S18), the control unit 70 starts the operation of the step-down circuit 42 in Step S19.

  If the power saving flag is on (Yes in step S20), the control unit 70 turns off the power saving flag (step S21), and the process returns to step S12. If the power saving flag is off (No in step S20), the process directly returns to step S12. That is, when the rotation state continues for a certain time, the control unit 70 starts the operation of the step-down circuit 42 and shifts the clock display unit 60 to the normal mode.

  On the other hand, when the outputs of the rotation detection units 30A, 30B, and 30C do not indicate the rotation state in Step S16 (No in Step S16), the control unit 70 determines that the electronic device is in the non-portable state, and The rotation time counter is incremented and the rotation time counter is initialized (step S22). Here, when the non-rotating state does not continue for the first time (No in step S23), the process returns to step S12. Only when the non-rotating state continues for the first time (Yes in Step S23), the control unit 70 stops the operation of the step-down circuit 42 in Step S24.

  If the non-rotating state continues for a second time longer than the first time (Yes in step S25), the control unit 70 turns on the power saving flag (step S26), and the process Return to step S12. If the non-rotating state has not continued for the second time (No in step S25), the process directly returns to step S12. That is, the control unit 70 stops the operation of the step-down circuit 42 when the non-rotation state continues for the first time, and when the non-rotation state continues for the longer second time, the clock display unit 60 Shift to power saving mode.

  As described above, the control unit 70 shifts the clock display unit 60 to the power saving mode when it is determined to be in the non-portable state according to the output from the rotation detection unit, and sets the clock display unit 60 to the normal mode when it is determined to be in the portable state. To migrate. By switching the operation mode of the clock display unit 60, the power consumption of the electronic device can be reduced.

  FIG. 22 is a flowchart of motor drive control by the control unit 70. The movement of the timepiece display unit 60 is performed by driving the motor in the timepiece display unit 60 with either a normal pulse with a relatively small amount of current consumption or a load compensation pulse with a relatively large amount of current consumption. In order to reduce power consumption, it is desirable to use the load compensation pulse as much as possible. However, when the rotating member 22 is rotating, the motor is driven because the user is carrying the electronic device and is active. The load on the gear mechanism to be changed fluctuates, and the motor may not rotate with a normal pulse. Therefore, when the rotation detection units 30A, 30B, and 30C detect the rotation of the rotation member 22 by motor drive control described below, the control unit 70 causes the rotation detection units 30A, 30B, and 30C to rotate the rotation member 22. The timepiece display unit 60 is driven with a pulse that is stronger than when it is not detected, that is, a pulse having a higher driving force than a normal motor driving pulse.

  First, the control unit 70 determines whether or not the present time is a hand movement timing (step S31), and executes the following process only at the hand movement timing.

  At the hand movement timing (Yes in step S31), the control unit 70 determines whether or not the rotating member 22 is in a rotating state from the outputs of the rotation detecting units 30A, 30B, and 30C (step S32).

  When the outputs of the rotation detection units 30A, 30B, and 30C indicate the rotation state (Yes in step S32), the electronic device may be in a portable state, and the motor may not rotate with normal pulse output due to device vibration. There is. Therefore, in order to move the needle reliably, the control unit 70 outputs a load compensation pulse (step S36). Then, the process returns to step S31, and the control unit 70 waits until the next hand movement timing.

  On the other hand, when the output of the rotation detection unit does not indicate the rotation state (No in step S32), the electronic device is in a non-portable state and there is no vibration of the device, so that the motor can be driven stably. . Therefore, in order to reduce power consumption, the control unit 70 outputs a normal pulse (step S33).

  Subsequently, the control unit 70 detects a current waveform of a motor rotation detection circuit (not shown) in the clock display unit 60 (step S34). Since the current waveform varies depending on whether or not the motor is rotating, if the rotation of the motor is not detected from the current waveforms of the rotation detectors 30A, 30B, and 30C (No in step S34), The control unit 70 outputs a load compensation pulse (step S36). Then, the process returns to step S31, and the control unit 70 waits until the next hand movement timing.

  On the other hand, if rotation of the motor is detected (Yes in step S34), the control unit 70 determines once more whether or not the rotating member 22 is in a rotating state from the outputs of the rotation detecting units 30A, 30B, and 30C. (Step S35). This is because when the rotating member 22 is rotating, erroneous detection may occur in the motor rotation detection process in step S32 due to the power generation noise of the electret, and the motor actually rotates in step S34. This is because there is a possibility that a false detection that the motor is rotating although it has not been performed.

  When the outputs of the rotation detection units 30A, 30B, and 30C indicate the rotation state (Yes in step S35), the control unit 70 outputs a load compensation pulse once again for the sake of safety (in order to ensure that the hand moves) ( Step S36). Thereafter, the process returns to step S31. On the other hand, when the outputs of the rotation detectors 30A, 30B, and 30C do not indicate the rotation state (No in step S35), the electronic device is in a non-portable state and there is no vibration of the device, so the load compensation pulse is output. Without processing, the process directly returns to step S31.

  By the above control, the motor in the clock display unit 60 can be rotated more reliably even when there is vibration of the device. Further, by proceeding to step S36 in the determination of step S32, when there is vibration of the device, two pulses are not output in step S33 and step S36, so that power consumption can be reduced.

  FIG. 23 is a flowchart of radio wave reception control by the control unit 70. The clock display unit 60 has a function of correcting the display time by periodically receiving radio waves from the outside, for example, once a day, and also functions as a receiving unit that receives radio waves. However, when there is vibration of the device, reception of radio waves may fail due to power generation noise of the electret. Therefore, the control unit 70 stops the reception of radio waves by the clock display unit 60 when the rotation detection units 30A, 30B, and 30C detect the rotation of the rotating member 22 by radio wave reception control described below.

  First, the control unit 70 determines whether or not the present is the reception timing (step S41), and executes the following process only at the reception timing.

  At the reception timing (Yes in step S41), the control unit 70 determines whether or not the user has set the electronic device to perform the reception process forcibly (step S42). If forced reception is set (Yes in step S42), there is a possibility that radio waves can be received. Therefore, the process proceeds to step S44, and the control unit 70 performs a reception operation.

  On the other hand, when the forced reception is not set (No in step S42), the control unit 70 determines whether or not the rotating member 22 is in a rotating state from the outputs of the rotation detecting units 30A, 30B, and 30C. (Step S43).

  If the output of the rotation detection unit indicates a rotation state (Yes in step S43), there is a possibility that reception may fail due to power generation noise of the electret. Further, when the rotating member 22 is in the rotating state, the electronic device is being carried, so that the direction of the antenna that receives the radio wave is not constant, and the received radio wave intensity varies, so reception of time data fails. The probability of doing is increased. For this reason, the control unit 70 stops reception of radio waves when the rotating member 22 is in a rotating state (step S48), performs reception failure processing (step S49), and ends the radio wave reception control.

  On the other hand, when the output of the rotation detection unit does not indicate the rotation state (No in step S43), there is no electrification power generation noise and there is a possibility that radio waves can be received stably. For this reason, it progresses to step S44 and the control part 70 performs receiving operation. Subsequently, the control unit 70 determines whether or not the reception in step S44 is successful (step S45).

  If the reception in step S44 has failed (No in step S45), the control unit 70 stops the subsequent reception (step S48). And the control part 70 performs the process of reception failure which invalidates the data received by step S44 (step S49), and complete | finishes radio wave reception control. On the other hand, when the reception is successful (Yes in step S45), the control unit 70 determines again whether or not the rotating member 22 is in a rotating state from the outputs of the rotation detecting units 30A, 30B, and 30C ( Step S46).

  When the outputs of the rotation detection units 30A, 30B, and 30C indicate a rotation state (Yes in step S46), there is a possibility that an error may be included in the obtained time data even if reception is successful. . For this reason, the control unit 70 stops the subsequent reception (step S48). And the control part 70 performs the process of reception failure which invalidates the data received by step S44 (step S49), and complete | finishes radio wave reception control.

  On the other hand, when the output of the rotation detectors 30A, 30B, 30C does not indicate the rotation state (No in step S46), it is considered that there is no power generation noise of the electret and radio waves can be received stably. The control unit 70 performs reception success processing (step S47), and ends the radio wave reception control.

  As described above, in the electronic devices 1, 1 ′, 2, and 3, the movement of the rotating member 22 of the power generation unit 20 is directly detected by the rotation detection units 30 </ b> A, 30 </ b> B, and 30 </ b> C that are separate from the power generation electrode 25. If the spring contact 31 of the rotation detection unit 30A or the rotation detection electrode 33 of the rotation detection unit 30B is used, there is no need to provide a dedicated space for the rotation detection sensor, so that the device size is not increased and structural changes are made. This makes it possible to grasp the portable state of the device with a small amount. The control unit 70 controls the operation of the charging unit 40 and the operation mode of the clock display unit 60 according to the detection results of the rotation detection units 30A, 30B, and 30C, thereby improving the efficiency of power generation by the power generation unit 20. It becomes possible to reduce power consumption.

  It should be noted that the technical scope of the present invention is not limited to the above-described embodiment, and includes those in which various modifications are made to the above-described embodiment without departing from the spirit of the present invention. That is, the specific configuration described in the embodiment is merely an example, and can be changed as appropriate.

1, 1 ', 2, 3 Electronic equipment 10 Housing 11 Rotating shaft 20 Power generation unit 21 Rotating weight 22 Rotating member 23 Charged film 24 Counter substrate 25, Vin1, Vin2 Power generation electrode 30A, 30B, 30C Rotation detection unit 31 Spring contact 33 , 33 ′, VinS1, VinS2 Rotation detection electrode 40 Charging unit 50 Power storage unit 60 Clock display unit 70 Control unit

Claims (16)

A housing,
A power generation unit that includes a rotating member that is rotatable with respect to the housing, and that generates electricity using electrostatic induction by rotating the rotating member;
A rotation detector for detecting rotation of the rotating member;
A power storage unit that stores electric power generated by the power generation unit;
An operation unit that operates using electric power supplied from the power storage unit;
A control unit that controls the operation of the operation unit according to an output from the rotation detection unit;
An electronic device comprising:   2. The control unit according to claim 1, wherein the control unit sets the operation mode of the operation unit to one of a normal mode and a power saving mode that consumes less power than the normal mode in accordance with an output from the rotation detection unit. Electronics. The operation unit is a clock display unit that mechanically drives a pointer to display time,
The control unit drives the timepiece display unit with a pulse having a higher driving force when the rotation detection unit detects rotation of the rotation member than when the rotation detection unit does not detect rotation of the rotation member. The electronic device according to claim 1 or 2. The operating unit is a receiving unit that receives radio waves,
The electronic device according to claim 1, wherein the control unit stops reception of radio waves by the reception unit when the rotation detection unit detects rotation of the rotation member. The power generation unit
A fixed substrate fixed to the housing facing the rotating member;
A charging film disposed on one of the rotating member and the fixed substrate;
A counter electrode disposed opposite to the charging film on the other of the rotating member and the fixed substrate;
The electronic device according to claim 1, wherein the electric power generated between the charging film and the counter electrode is output to the power storage unit.   The electronic device according to claim 5, wherein the rotation detection unit includes a rotation detection electrode for detecting a voltage generated by electrostatic induction according to rotation of the rotation member.   The electronic device according to claim 6, wherein the rotation detection electrode is provided on the other of the rotation member and the fixed substrate.   The electronic device according to claim 7, wherein the rotation detection electrode is disposed in the vicinity of a rotation axis of the rotation member or along an outer edge of the rotation member.   The electronic device according to claim 7 or 8, wherein a side surface of the rotation detection electrode is parallel to a side surface of the counter electrode.   The electronic device according to claim 6, wherein the rotation detection unit includes a plurality of the rotation detection electrodes. A charge unit that charges the power storage unit by stepping down the voltage generated by the power generation unit using a step-down circuit;
The electronic device according to any one of claims 6 to 10, wherein the step-down circuit includes a plurality of sets of capacitors capable of switching a series-parallel connection in accordance with a period of an output waveform from the rotation detection electrode. . The power generation unit further includes a rotating weight rotatable with respect to the housing for rotating the rotating member,
The electronic device according to claim 1, wherein the rotation detection unit includes a spring contact that contacts the rotating weight when the rotating weight rotates.   The electronic device according to claim 12, wherein the spring contact is in contact with the rotary weight at a position closer to a rotation axis of the rotary weight than an outer edge of the rotary weight in a radial direction of the rotary weight.   The electronic device according to claim 12 or 13, wherein a plurality of the spring contacts are arranged at an equal angle around a rotation axis of the rotary weight in accordance with a size of a central angle of the rotary weight.   The electronic device according to claim 12 or 13, wherein the spring contact is disposed in the vicinity of a stop position of the rotary weight according to a usage form of the electronic device in a rotation direction of the rotary weight. The rotation detection unit is electrically connected to the power generation unit,
The electronic device according to claim 1, further comprising a direct current removal unit that removes a direct current flowing from the power generation unit into the rotation detection unit.

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