JP2019164162A - Electronic clock - Google Patents

Abstract

To provide an electronic clock that includes display means enabling an indicator needle to deliver a state of a clock or information thereof to a user by low power consumption.SOLUTION: An electronic clock has: a minute pulse generation circuit that supplies a minute pulse MP of drive force in which a rotor 12 of a step motor 10 is put into non-rotation; a detection pulse generation circuit 25 that detects rotation of the rotor 12; a rotation detection circuit 29 that determines the rotation or the non-rotation of the rotor 12; and a reverse pulse generation circuit 24 that supplies a reverse pulse FP causing the rotor 12 to rotate. The minute pulse MP has: a first pulse that is output to one terminal of a drive coil 11; and a second pulse that is output to other terminal thereof, and when it is determined that the rotor 12 rotates after the first pulse is output, the reverse pulse FP is output, which in turn a sector form oscillation with no action can be continued.SELECTED DRAWING: Figure 6

Description

The present invention relates to an electronic time meter analog display type provided with a step motor.

2. Description of the Related Art Conventionally, an electronic timepiece having an analog display means is generally driven by a step motor. The step motor includes a stator magnetized by a coil,
It is composed of a rotor which is a magnetized disk-like rotating body, and displays time by a pointer by being driven every second, for example.

  In recent years, multifunctional analog electronic watches having additional functions such as a stopwatch, an alarm, and a timer have been commercialized. As such a multi-function electronic timepiece, a proposal has been made to provide a dedicated alarm hour / minute hand, chronograph hand, etc. at an arbitrary position on the dial plate in addition to a normal second hand, minute hand and hour hand (for example, Patent Document 1). reference).

  This multi-function electronic timepiece of Patent Document 1 includes a fan-shaped hand moving means in which the 1/10 second chronograph hand moves to the left and right around the 0 position when there is no crown or button operation for 10 minutes in the stopwatch measurement state. Yes. With this function, 39 drive pulses are generated per second during stopwatch measurement, but with a chronograph hand fan movement, only 3 drive pulses are generated per second, so the battery life can be extended. At the same time, the effect of being able to know at a glance that the stopwatch is being measured is shown.

Japanese Patent No. 2993202 (page 10, FIG. 31)

  However, the fan-shaped hand movement means of the multi-function electronic timepiece presented in Patent Document 1 moves the chronograph hands clockwise and counterclockwise around the 0 position, so that a step motor that moves the chronograph hands each time. Must be rotated forward and backward by one step, and a large drive power is required. This is because the reverse drive of the step motor requires about 10 times the drive power as an example compared to the forward drive.

  Therefore, in the conventional fan-shaped hand moving means that requires the reverse drive of the step motor, even if the number of times the step motor is moved is small, the actual drive power becomes considerably large. Further, if the pointer is moved in a fan-shaped manner by forward and reverse rotation by one step feeding, the speed of the hand movement becomes slow, so that the movement is awkward and the user feels uncomfortable.

  SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems and to provide an electronic timepiece having a display means with a pointer that can transmit the state and information of the timepiece to a user with low power consumption.

In order to solve the above problem, an electronic time meter of the present invention employs the following configuration described.

Electronic timepiece of the invention, a rotor for driving the hands, and a driving coil for driving the B over data, a step motor having a minute pulse of a driving force Russia over data is non-rotating, driving A minute pulse generation circuit to be supplied to the coil and a detection pulse for detecting the rotation of the rotor,
A detection pulse generation circuit to be supplied to the drive coil, a rotation detection circuit for detecting a detection signal generated by the detection pulse and determining whether the rotor is rotating or not rotating, and a reverse rotation for supplying a reverse pulse for rotating the rotor to the drive coil And the minute pulse has a first pulse output to one terminal of the drive coil and a second pulse output to the other terminal of the drive coil, and the first pulse When the rotor is determined to be non-rotating by the rotation detection circuit, the second pulse is output, and when the rotation detection circuit determines that the rotor is rotating, a reverse pulse is used instead of the second pulse. It is output .

  The minute pulse generation circuit is characterized by continuously outputting minute pulses at intervals shorter than 1 second.

  Thus, by continuously outputting minute pulses at intervals shorter than 1 second, for example, the pointer can be vibrated at high speed by the minute pulses even in a short period of about 1 second. The person can fully recognize the vibration of the pointer.

  The driving force of the second pulse is less than or equal to the driving force of the first pulse.

  As a result, the balance between the driving force of the first pulse and the driving force of the second pulse can be maintained, so that the balance of vibration in the forward and reverse directions of the pointer is appropriate, and fan-shaped vibration with a good-looking pointer is realized. it can.

Further, infinitesimal pulse generating circuit, characterized in that it is capable of generating a configuration in which a plurality of types of fine pulses having different driving forces.

  The detection pulse includes a first detection pulse output to a terminal on a different side from the first pulse, and a second detection pulse output to a terminal on the same side as the first pulse after the output of the first detection pulse is completed. The driving force of the minute pulse is selected according to the detection position of the first detection signal generated by the first detection pulse.

  As a result, the driving force of the minute pulse is selected and adjusted according to the detection position of the first detection signal, so that the change in the driving force of the minute pulse due to the battery voltage fluctuation can be finely corrected, and there is little false rotation and the vibration of the pointer Fan-shaped vibration with stable amplitude can be realized.

  Further, the output position of the second pulse is changed depending on the detection position of the first detection signal generated by the first detection pulse.

  As a result, even if the movement or amplitude of the fan-shaped vibration changes due to a change in the battery voltage or the like by changing the output position of the second pulse according to the detection position of the first detection signal, the timing according to the change Since the minute pulse is supplied by the fan, the fan-shaped vibration of the pointer is smooth and stable, and the fan-shaped vibration having a good appearance and excellent visibility can be realized.

In addition, the minute pulse generation circuit sets the driving force of the minute pulse to a driving force lower than the currently set driving force when the rotation detection circuit determines that the rotor has rotated after the minute pulse is output. Features.

Further, the minute pulse generation circuit sets the driving force of the minute pulse to a driving force higher than the currently set driving force when the rotation detection circuit determines that the rotor has not rotated a predetermined number of times. .

Also, it has a battery, and the minute pulse generation circuit drives the minute pulse according to the fluctuation of the battery voltage.
It is characterized by setting power.

  As described above, according to the present invention, a fan-shaped vibration in which the pointer moves quickly to the left and right is realized by supplying the step motor with a minute pulse shorter than 1 second having a small driving force that causes the rotor of the step motor to be non-rotating. it can. As a result, the pointer can be oscillated in a fan shape without causing the step motor to rotate forward and reverse by one step. Therefore, the state of the pointer that can transmit the state and information of the watch to the user with lower power consumption than in the past. An electronic timepiece having display means by fan-shaped vibration can be provided. In addition, since the pointer vibrates quickly from side to side, it is possible to realize display means using the pointer that has good visibility and good visibility for the user.

It is a block diagram which shows schematic structure of the electronic timepiece concerning the 1st Embodiment of this invention. It is a wave form diagram explaining the minute pulse waveform of the electronic timepiece concerning the 1st Embodiment of this invention. It is an operation | movement figure explaining the fan-shaped vibration operation | movement by the step motor of the electronic timepiece concerning the 1st Embodiment of this invention, and a train wheel. It is a wave form diagram explaining the minute pulse waveform of the electronic timepiece concerning the 2nd Embodiment of this invention. It is an operation | movement figure explaining the fan-shaped vibration operation | movement by the step motor of an electronic timepiece concerning the 2nd Embodiment of this invention, and a train wheel. It is a block diagram which shows schematic structure of the electronic timepiece concerning the 3rd Embodiment of this invention. It is a circuit diagram which shows an example of the driver circuit and rotation detection circuit concerning the 3rd Embodiment of this invention. It is a rank table explaining the rotation detection operation | movement figure of the rotation detection circuit concerning the 3rd Embodiment of this invention, and the driving force rank of a micro pulse. It is a wave form diagram explaining the micro pulse of the electronic timepiece concerning the 3rd Embodiment of this invention, a detection pulse, and a reverse pulse. It is a flowchart explaining the fan-shaped vibration operation | movement of the electronic timepiece concerning the 3rd Embodiment of this invention. It is a timing chart explaining operation | movement when a rotor misrotates in the fan-shaped vibration of the electronic timepiece concerning the 3rd Embodiment of this invention. It is a timing chart explaining the operation | movement when a rotor carries out normal rotation vibration in the fan-shaped vibration of the electronic timepiece concerning the 3rd Embodiment of this invention. It is a block diagram which shows schematic structure of the electronic timepiece concerning the 4th Embodiment of this invention. It is a wave form diagram explaining the micro pulse of the electronic timepiece concerning the 4th Embodiment of this invention, a detection pulse, and a reverse pulse. It is a flowchart explaining the fan-shaped vibration operation | movement of the electronic timepiece concerning the 4th Embodiment of this invention. It is a timing chart explaining operation | movement when a rotor misrotates in the sector vibration of the electronic timepiece concerning the 4th Embodiment of this invention. It is a timing chart explaining the operation | movement when a rotor carries out normal rotation vibration in the fan-shaped vibration of the electronic timepiece concerning the 4th Embodiment of this invention. It is a wave form diagram explaining the micro pulse of the electronic timepiece concerning the 5th Embodiment of this invention, a detection pulse, and a reverse pulse. It is a flowchart explaining the fan-shaped vibration operation | movement of the electronic timepiece concerning the 5th Embodiment of this invention. It is a timing chart explaining the rotational vibration operation when the driving force of the minute pulse is relatively strong in the sector vibration of the electronic timepiece according to the fifth embodiment of the present invention. It is a timing chart explaining the rotational vibration operation when the driving force of the minute pulse is relatively weak in the sector vibration of the electronic timepiece according to the fifth embodiment of the present invention. It is a timing chart explaining operation | movement when a rotor misrotates in the fan-shaped vibration of the electronic timepiece concerning the 5th Embodiment of this invention. It is a flowchart explaining the fan-shaped vibration operation | movement of the electronic timepiece concerning the 6th Embodiment of this invention. It is a timing chart explaining the rotational vibration operation when the driving force of the minute pulse is relatively strong in the sector vibration of the electronic timepiece according to the sixth embodiment of the present invention. It is a timing chart explaining the rotational vibration operation when the driving force of the minute pulse is relatively weak in the fan-shaped vibration of the electronic timepiece according to the sixth embodiment of the present invention. It is a timing chart explaining operation | movement when a rotor misrotates in the fan-shaped vibration of the electronic timepiece concerning the 6th Embodiment of this invention. It is explanatory drawing explaining the fan-shaped vibration in the time of standard wave reception of the electronic timepiece with a radio wave correction function concerning the 7th Embodiment of this invention. It is explanatory drawing explaining the fan-shaped vibration in the time of standard wave reception of the electronic timepiece with a radio wave correction function concerning the modification of the 7th Embodiment of this invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
[Features of each embodiment]
A feature of the first embodiment is a basic form of the present invention, in which a set of minute pulses that first cause the rotor to rotate and vibrate in the forward direction and then rotate and vibrate in the reverse direction are continuously output to the step motor. It is an electronic timepiece that causes the hands to vibrate.

  A feature of the second embodiment is an electronic timepiece in which a pair of minute pulses that first rotate and vibrate the rotor in the reverse direction and then rotate and rotate in the forward direction are continuously output to the step motor to fan-shaped the pointer. is there.

  The feature of the third embodiment is that the rotation detection operation of the rotor is performed after outputting a set of minute pulses.

  The feature of the fourth embodiment is that the first pulse and the second pulse of the minute pulse are separated and the rotation detection operation of the rotor is performed after the output of the first pulse.

  The feature of the fifth embodiment is that the rotation detection operation of the rotor is performed after the first pulse of the minute pulse is output, and the driving force of the minute pulse and the output position of the second pulse are adjusted according to the vibration state of the rotor. That is.

  The feature of the sixth embodiment is that the rotation detection operation of the rotor is performed after outputting a set of minute pulses, and the driving force of the minute pulses is selected according to the vibration state of the rotor.

  The feature of the seventh embodiment is an example in which the display means based on the fan-shaped vibration of the pointer of the first to sixth embodiments is applied to the display during reception of the radio timepiece.

[First Embodiment]
[Description of Configuration of Electronic Timepiece of First Embodiment: FIG. 1]
A schematic configuration of the electronic timepiece of the first embodiment will be described with reference to FIG. In FIG. 1, reference numeral 1 denotes an analog display type electronic timepiece according to the present invention. The electronic timepiece 1 includes an oscillation circuit 2, a control circuit 3, a drive pulse generation circuit 4, a minute pulse generation circuit 5, a driver circuit 6, and a step motor 10 that output a predetermined reference signal P1 by a crystal resonator (not shown). have. The electronic timepiece 1 includes a display unit such as hands, a train wheel, a power source, an operation member, and the like, which are not shown here.

  The step motor 10 includes a drive coil 11 and a rotor 12 that is rotated by the magnetic force from the drive coil 11, but details of the configuration will be described later.

  The control circuit 3 receives the reference signal P1, divides it into predetermined frequency signals, and outputs control signals CN1 and CN2 for controlling each circuit.

  The drive pulse generation circuit 4 receives the control signal CN 1, generates a drive pulse SP for rotationally driving the step motor 10, and outputs it to the driver circuit 6.

  The minute pulse generation circuit 5 receives the control signal CN2 and generates a minute pulse MP that is continuously output at intervals shorter than 1 second with a small driving force that causes the rotor 12 of the step motor 10 to be non-rotating. Output to.

  The driver circuit 6 receives the drive pulse SP and the minute pulse MP, outputs the drive waveforms O1 and O2 based on each pulse signal from the output terminals O1 and O2, and supplies them to the drive coil 11 of the step motor 10 to supply the step motor. 10 is driven. For easy understanding, the output terminals O1 and O2 of the driver circuit 6, the output drive waveforms O1 and O2, and the coil terminals of the drive coil 11 to which the drive waveforms O1 and O2 are supplied as will be described later. The signs were the same. The symbols O1 and O2 are the same in the second to sixth embodiments described later.

[Explanation of the minute pulse of the first embodiment: FIG. 2]
Next, the waveform of the minute pulse MP for causing the pointer to vibrate in a sector shape, which is a feature of the present invention, will be described with reference to FIG. In FIG. 2, the minute pulse MP is output to the other terminal of the drive coil 11 immediately after the output of the first pulse MP1 output to the first terminal of the drive coil 11 of the step motor 10 and the first pulse MP1. The second pulse MP2 is a pulse composed of a set of two alternating pulses.

  Here, the first pulse MP1 in the first embodiment is output from the output terminal O2 of the driver circuit 6 to rotate and vibrate the rotor 12 of the step motor 10 in the forward rotation direction, and the second pulse MP2 is the driver circuit. 6 is output from the output terminal O1 and vibrates the rotor 12 in the reverse direction.

  The first pulse MP1 is composed of a plurality of pulse trains having a cycle of 0.5 mS as an example, and the details of the duty will be described later. For example, it is 16/32, and is output continuously for a period of 3.5 mS as an example.

  The second pulse MP2 is also composed of a plurality of pulse trains having a cycle of 0.5 mS as an example, and the details of the duty will be described later. For example, it is 8/32 and is output continuously for a period of 7.0 mS as an example.

  As described above, the minute pulse MP composed of the first pulse MP1 and the second pulse MP2 does not have a driving force enough to rotate the rotor 12 as described above. The rotor 12 is rotated and oscillated in the forward direction and the reverse direction. The reason why the output period of the first pulse MP1 is 3.5 mS and the output period of the second pulse MP2 is 7.0 mS is because the rotational vibration of the rotor 12 vibrates in the most balanced manner through experiments. Of course, it may be changed arbitrarily depending on the performance of the step motor and the conditions such as the train wheel connected to the step motor.

  Further, the driving force of the second pulse MP2 may be smaller than the driving force of the first pulse MP1. This is because the rotor 12 first rotates and vibrates in the forward direction with the first pulse MP1, and then rotates and vibrates in the reverse direction with the second pulse MP2. The driving force of the second pulse MP2 may be small because the force to try is working.

  Further, as an example, the minute pulse MP is continuously output at a cycle of 32 mS, and drives the step motor 10. As a result, the rotor 12 of the step motor 10 repeats rotational vibration at a cycle of 32 mS. The repetition period Pe of the minute pulse MP is arbitrary. However, if the period of the rotational vibration of the rotor 12 is too slow, the movement of the fan-shaped vibration of the pointer becomes slow and awkward and looks bad.

  Accordingly, the repetition period Pe is preferably an interval shorter than 1 second, and 32 mS as an example is appropriate. Note that the pulse width and period of each pulse in the waveform diagram shown in FIG. 2 and the waveform diagrams of each embodiment described later are not limited, and can be arbitrarily changed according to the performance of the step motor and the specifications of the electronic timepiece. Good.

[Description of Step Motor and Fan-Shaped Vibration Operation of First Embodiment: FIG. 3]
Next, the fan-shaped vibration operation using the step motor and the pointer according to the first embodiment will be described with reference to FIG. In FIG. 3, first, the configuration of the step motor 10 will be described. The step motor 10 includes a drive coil 11, a rotor 12, a stator 13, and the like. The rotor 12 is a magnetized disk-shaped rotating body, and N and S poles are magnetized in the radial direction.

  The stator 13 is made of a soft magnetic material, and semicircular portions 13a and 13b surrounding the rotor 12 are divided by slits. A single-phase drive coil 11 is wound around a base portion 13c to which the semicircular portions 13a and 13b are coupled.

  The drive coil 11 has two coil terminals. The terminal to which the drive waveform O1 from the driver circuit 6 is supplied is referred to as a coil terminal O1 having the same sign, and the terminal to which the drive waveform O2 is supplied is the same. This is referred to as a coil terminal O2.

  In addition, concave notches 13d and 13e are formed at predetermined positions on the inner peripheral surfaces of the semicircular portions 13a and 13b of the stator 13 that face each other. Due to the notches 13d and 13e, the static stable point of the rotor 12 (indicated by the hatched line A) is shifted from the electromagnetic stable point of the stator 13 (indicated by the horizontal dotted line D). . The angle difference due to this deviation is referred to as an initial phase angle θ, and the initial phase angle θ allows the rotor 12 to be brazed so as to easily rotate in a predetermined direction (clockwise).

  Here, since the drive pulse SP is supplied to the drive coil 11 of the step motor 10 and the rotor 12 rotates in the clockwise direction (forward rotation) and the counterclockwise direction (reverse rotation), it is well known, so the description is omitted. The rotational vibration operation of the step motor 10 by the minute pulse MP, which is a feature of the present invention, will be described below.

  3, when the rotor 12 is at the static stable point A, when the first pulse MP1 shown in FIG. 2 is supplied to the coil terminal O2 of the drive coil 11 of the step motor 10, the semicircular portion 13a of the stator 13 is provided. Is magnetized to the N pole, and the semicircular portion 13b is magnetized to the S pole. As a result, the N pole of the rotor 12 and the N pole of the semicircular portion 13a are repelled, and the S pole of the rotor 12 and the S pole of the semicircular portion 13b are repelled, so that the rotor 12 is indicated by a locus C of a dotted line. Rotate clockwise (forward direction).

  Here, as described above, the first pulse MP1 does not have a driving force enough to rotate the rotor 12 by one step. Therefore, the rotor 12 rotates in the forward rotation direction but exceeds the holding torque peak position B even when approaching. Without reaching the position C1, without returning to the static stable point A, that is, returning in the counterclockwise direction, reversely rotates (see locus C).

  Next, when the second pulse MP2 shown in FIG. 2 is supplied to the coil terminal O1 of the drive coil 11 of the step motor 10, the semicircular portion 13a of the stator 13 becomes the S pole and the semicircular portion 13b becomes the N pole. Magnetized. As a result, the N pole of the rotor 12 and the S pole of the semicircular portion 13a attract each other, and the S pole of the rotor 12 and the N pole of the semicircular portion 13b attract each other. It passes through the stable point A and further rotates counterclockwise.

  Here, as described above, the second pulse MP2 does not have a driving force enough to reversely rotate the rotor 12 by one step. Therefore, the rotor 12 rotates in the reverse direction but exceeds the holding torque peak position B. Without reaching the position C2, the rotor 12 rotates if it returns to the static stable point A, i.e., rotates back in the clockwise direction, and the minute pulse MP ends in only one set. The vibration is attenuated and converges at a static stable point A (see locus C).

  In addition, as shown in FIG. 2, if the minute pulse MP is continuously supplied to the step motor 10 at the repetition period Pe = 32 mS, the movement of the rotor 12 is positioned around the static stable point A. Between C1 and C2, it repeatedly rotates and vibrates in the forward direction and the reverse direction with a period of 32 mS.

  When a normal drive pulse is supplied to the drive coil 11, the rotor 12 rotates 180 degrees beyond the holding torque peak position B and stops at the static stable point A. This rotation of the rotor 12 by 180 degrees is a normal one-step feed.

  Here, as shown in FIG. 3, the rotor 12 of the step motor 10 is connected to the pointer H via the two-stage wheel trains W1 and W2, and when the rotor 12 is positioned at the static stable point A, the pointer H is If it is configured to be at the center position h0, when the rotor 12 is at the position C1 that is the peak point in the forward direction, the pointer H is at the position h1, and the rotor 12 is at the position C2 that is the peak point in the reverse direction. At this time, the pointer H is at the position h2.

  That is, when the minute pulse MP shown in FIG. 2 is supplied to the step motor 10, the pointer H vibrates with a predetermined amplitude E on the left and right on the drawing with the center position h0 as a reference. The movement of the pointer H is fan-shaped vibration. Therefore, the period of the sector vibration of the pointer H depends on the repetition period Pe of the minute pulse MP, and the amplitude E depends on the driving force of the minute pulse MP.

  For example, if the repetition period Pe is shortened, the fan-shaped vibration of the pointer H will vibrate quickly, and if the driving force of the minute pulse MP (depending on the duty of the first pulse MP1 and the second pulse MP2) is increased. The amplitude E of the fan-shaped vibration of the pointer H increases and becomes conspicuous.

  As described above, according to the first embodiment, the minute pulse MP having such a small driving force that the rotor 12 of the step motor 10 does not rotate is alternately supplied to the drive coil 11 to rotate the rotor 12 in the normal direction. The pointer can be oscillated in a non-rotating direction and in a reverse direction, and the pointer can be oscillated in a sector shape with a predetermined period and amplitude. As a result, the step motor 10 can be oscillated in a fan shape instead of forward and reverse step feeding, so that the time and information of the watch can be transmitted to the user in an easy-to-understand manner with lower power consumption than in the past. An electronic timepiece having display means by fan-shaped vibration can be provided.

For example, in an electronic timepiece with a stopwatch function, the chronograph hands are normally driven (rotated) at high speed during measurement, but after a predetermined time has passed, the chronograph hands are moved in a sector shape by the micro pulse of the present invention. By switching to vibration, the user can be informed that the stopwatch is being measured by fan-shaped vibration, and can continue measuring the stopwatch with extremely low power consumption, greatly increasing the battery life of the electronic watch. It can be extended.

  In addition, since the conventional fan-shaped hand movement is realized by forward and reverse step feeds of the step motor, the movement of the pointer is slow and the movement is awkward and poor in appearance. However, as described above, the fan-shaped vibration of the present invention vibrates rapidly both in the forward direction and in the reverse direction because the rotation of the rotor 12 does not exceed the holding torque peak position B (see FIG. 3). Therefore, the speed of the rotational vibration of the rotor 12 depends on the repetition period Pe of the minute pulse MP, and can be vibrated at a high speed with a period of 32 mS, for example.

  For this reason, it is possible to realize fast fan vibration at high speed, and it is possible to realize fan vibration with a pointer that has good appearance and excellent visibility. In addition, the effect of 1st Embodiment as mentioned above has the same effect also in 2nd-6th embodiment mentioned later.

  Further, the configuration of the minute pulse MP is not limited to two pulses of the first pulse MP1 and the second pulse MP2, and for example, the vibration amplitude is small but only the first pulse MP1 may be used, or the drive coil You may comprise the micropulse which made 3 sets, 4 times, or more pulses which drive 11 alternately.

[Second Embodiment]
[Description of Minute Pulse of Electronic Timepiece of Second Embodiment: FIG. 4]
Next, a minute pulse of the electronic timepiece according to the second embodiment will be described with reference to FIG. The configuration of the electronic timepiece of the second embodiment is the same as the configuration of the first embodiment described above (see FIG. 1), and thus the description of the configuration is omitted. In FIG. 4, the minute pulse MP of the second embodiment includes a first pulse MP1 output to one terminal of the drive coil 11 of the step motor 10 and the first pulse MP1 as in the first embodiment. The second pulse MP2 output to the other terminal of the drive coil 11 immediately after the end of the output.

  Here, the first pulse MP1 in the second embodiment is output from the output terminal O1 of the driver circuit 6 to rotate and vibrate the rotor 12 of the step motor 10 in the reverse direction, and the second pulse MP2 is output from the driver circuit 6. Is output from the output terminal O2, and the rotor 12 is rotationally oscillated in the forward rotation direction.

  That is, the first pulse MP1 and the second pulse MP2 of the minute pulse MP of the second embodiment are output by switching the output terminals O1 and O2 with respect to the first embodiment. In addition, since each structure and repetition period Pe of 1st pulse MP1 and 2nd pulse MP2 are the same as that of 1st Embodiment, description is abbreviate | omitted.

[Description of Step Motor and Fan-Shaped Vibration Operation of Second Embodiment: FIG. 5]
Next, the fan-shaped vibration operation by the step motor and the pointer according to the second embodiment will be described with reference to FIG. Note that the configuration of the step motor 10 is the same as that of the first embodiment, and a description thereof will be omitted.

In FIG. 5, when the rotor 12 is at the static stable point A and the first pulse MP <b> 1 shown in FIG. 4 is supplied to the coil terminal O <b> 1 of the drive coil 11 of the step motor 10, the semicircular portion 13 a of the stator 13. Is magnetized to the S pole and the semicircular portion 13b to the N pole. As a result, the N pole of the rotor 12 and the S pole of the semicircular portion 13a are attracted, and the S pole of the rotor 12 and the N pole of the semicircular portion 13b are attracted, so that the rotor 12 is indicated by a dotted locus C. Rotates counterclockwise (reverse direction).

  Here, since the first pulse MP1 does not have a driving force enough to rotate the rotor 12 by one step as in the first embodiment, the rotor 12 rotates in the reverse direction but approaches the holding torque peak position B. After reaching the vicinity of the position C2 without exceeding, it returns to the static stable point A, that is, returns in the clockwise direction and rotates forward (see locus C).

  Next, when the second pulse MP2 shown in FIG. 4 is supplied to the coil terminal O2 of the drive coil 11 of the step motor 10, the semicircular portion 13a of the stator 13 becomes the N pole and the semicircular portion 13b becomes the S pole. Magnetized. As a result, the N pole of the rotor 12 and the N pole of the semicircular portion 13a repel each other, and the S pole of the rotor 12 and the S pole of the semicircular portion 13b repel each other. Then, it passes through the static stable point A and further rotates clockwise in the clockwise direction.

  Here, as in the first embodiment, the second pulse MP2 does not have enough driving force to rotate the rotor 12 by one step. Therefore, the rotor 12 rotates in the forward rotation direction but at the holding torque peak position B. After reaching near the position C1 without approaching and exceeding, if returning to the static stable point A, that is, returning in the counterclockwise direction and rotating in the reverse direction, and the minute pulse MP ends with only one set. For example, the rotational vibration of the rotor 12 is attenuated and converges at the static stable point A (see locus C).

  Further, as shown in FIG. 4, if the minute pulse MP is continuously supplied to the step motor 10 at the repetition period Pe = 32 mS, the movement of the rotor 12 is positioned around the static stable point A. Between C2 and C1, it repeatedly rotates and vibrates in the reverse rotation direction and the normal rotation direction at a cycle of 32 mS.

  Here, as in the first embodiment, the rotor 12 is connected to the pointer H via the two-stage wheel trains W1 and W2, and the pointer H is centered when the rotor 12 is positioned at the static stable point A. If it is configured to be positioned at the position h0, when the rotor 12 is at the position C1 that is the peak point in the forward rotation direction, the pointer H is at the position h1, and the rotor 12 is at the position C2 that is the peak point in the reverse rotation direction. At this time, the pointer H is at the position h2, and the pointer H vibrates in a sector shape by the minute pulse MP.

  Thus, as in the first embodiment, if the repetition period Pe of the minute pulse MP is shortened, the fan-shaped vibration of the pointer H will vibrate quickly, and if the driving force of the minute pulse MP is increased. The amplitude E of the fan-shaped vibration of the pointer H increases and becomes conspicuous.

  As described above, in the second embodiment, the alternating output of the minute pulse MP of the first embodiment described above is replaced, and the rotor 12 of the step motor 10 is first rotated and oscillated in the reverse direction. In this configuration, the pointer is fan-shaped and oscillated in the rolling direction. Although the details will be described later by driving the rotor 12 in this order of rotation direction, the rotor 12 is rotated by one step by detecting the rotation every time the rotor 12 performs one period of rotational vibration operation. There is an advantage that erroneous rotation can be detected.

[Third Embodiment]
[Description of Configuration of Electronic Timepiece of Third Embodiment: FIG. 6]
Next, a schematic configuration of the electronic timepiece according to the third embodiment will be described with reference to FIG. Note that the third embodiment is an application example in which a rotation detection function is added to the second embodiment described above.

In FIG. 6, reference numeral 20 denotes an analog display type electronic timepiece according to the third embodiment. The electronic timepiece 20 includes an oscillation circuit 21 that outputs a predetermined reference signal P1 by a crystal oscillator (not shown), a control circuit 22, a drive pulse generation circuit 23, a reverse pulse generation circuit 24, a detection pulse generation circuit 25, a minute pulse. A generation circuit 26, a selector circuit 27, a driver circuit 28, a rotation detection circuit 29, a rank selection circuit 30, and the step motor 10 are included.

  Since the step motor 10 has the same configuration as the step motor 10 of the first and second embodiments, description thereof is omitted. The electronic timepiece 20 includes a display unit such as hands, a train wheel, a power source, an operation member, and the like, which are not shown here.

  The control circuit 22 receives the reference signal P1, divides it into predetermined frequency signals, and outputs control signals CN3 to CN7 for controlling each circuit. The control circuit 22 has a function of inputting a determination signal P2 described later and controlling the reverse pulse generation circuit 24 to output the reverse pulse FP when the rotor 12 rotates erroneously.

  The drive pulse generation circuit 23 receives the control signal CN 3, generates a drive pulse SP that rotationally drives the step motor 10, and outputs it to the selector circuit 27.

  The reverse pulse generation circuit 24 receives the control signal CN4, generates a reverse pulse FP for reversely rotating the step motor 10, and outputs the reverse pulse FP to the selector circuit 27.

  The detection pulse generation circuit 25 receives the control signal CN5, generates a detection pulse CP for detecting the rotation of the step motor 10, and outputs the detection pulse CP to the selector circuit 27. The detection pulse CP includes a first detection pulse CP1 and a second detection pulse CP2.

  The minute pulse generation circuit 26 receives the control signal CN 6, generates a minute pulse MP for fan-shaped vibration of the pointer, and outputs it to the selector circuit 27. The minute pulse generation circuit 26 is configured to receive a rank signal RK, which will be described later, and to generate a plurality of types of minute pulses MP having different driving forces.

  The selector circuit 27 receives the drive pulse SP, the reverse pulse FP, the detection pulse CP, and the minute pulse MP, selects each pulse according to the operation mode, and outputs select signals SL1 and SL2.

  The driver circuit 28 receives the select signal SL1, outputs drive waveforms O1 and O2 based on each pulse signal from the output terminals O1 and O2, supplies the drive waveforms 11 to the drive coil 11 of the step motor 10, and drives the step motor 10. .

  The rotation detection circuit 29 receives the select signal SL2 and the detection signal CS generated at the coil terminals O1 and O2 of the drive coil 11, determines whether the rotor 12 is rotating or not, and sends the determination signal P2 to the control circuit 22. Output. Details of the driver circuit 28 and the rotation detection circuit 29 will be described later.

  The rank selection circuit 30 receives the control signal CN7 and outputs a rank signal RK for selecting the driving force of the minute pulse MP to the minute pulse generation circuit 26.

[Description of Circuit Configuration of Driver Circuit and Rotation Detection Circuit of Third Embodiment: FIG. 7]
Next, an example of the circuit configuration of the driver circuit 28 that drives the step motor 10 and the rotation detection circuit 29 that detects the rotation state of the step motor 10 will be described with reference to FIG. In FIG. 7, the driver circuit 28 includes a drive transistor DP1 (hereinafter abbreviated as a transistor DP1) that is a P-channel MOS transistor having a low ON resistance and a drive transistor DN1 (hereinafter referred to as a transistor DN1) that is an N-channel MOS transistor having a low ON resistance. The first driver circuit 28a has a complementary connection to the first driver circuit 28a.

  Similarly, the second driver circuit 28b is formed by complementary connection of a P-channel transistor DP2 and an N-channel transistor DN2 having a small ON resistance.

  The output terminal O1 of the first driver circuit 28a is connected to one coil terminal O1 of the drive coil 11 of the step motor 10, and the output terminal O2 of the second driver circuit 28b is the other coil of the drive coil 11 of the step motor 10. Connected to terminal O2. The gate signals G of the transistors DP1, DN1, DP2, and DN2 are connected to a select signal SL1 from the selector circuit 27 (see FIG. 6).

  With this configuration, any one of the drive pulse SP, the reverse pulse FP, the detection pulse CP, and the minute pulse MP input to the selector circuit 27 is selected according to the operation mode, and is input to the driver circuit 28 as the select signal SL1. 28, the drive waveforms O1 and O2 are supplied to the drive coil 11 of the step motor 10.

  The rotation detection circuit 29 has P-channel MOS transistors TP1 and TP2 (hereinafter abbreviated as transistors TP1 and TP2), the source terminals S of the transistors TP1 and TP2 are connected to the power supply VDD, and each gate terminal G is a selector. A select signal SL2 from the circuit 27 is input. The drain terminal D of the transistor TP1 is connected to one terminal of the detection resistor R1, and the drain terminal D of the transistor TP2 is connected to one terminal of the detection resistor R2.

  The other terminal of the detection resistor R1 is connected to the output terminal O1 of the first driver circuit 28a of the driver circuit 28 (that is, the drain coupling point of the transistors DP1 and DN1), and further, a determination circuit 29a built in the rotation detection circuit 29. Is input. The other terminal of the detection resistor R2 is connected to the output terminal O2 of the second driver circuit 28b of the driver circuit 28 (that is, the drain coupling point of the transistors DP2 and DN2), and further input to the determination circuit 29a. The resistance values of the detection resistors R1 and R2 are substantially equal, and a relatively high resistance is preferable.

  Here, a pair of signals input to the determination circuit 29a to which the detection resistors R1 and R2 are connected are referred to as a detection signal CS, and the detection signal generated by the first detection pulse CP1 is a first detection signal, which will be described in detail later. The detection signal generated by the second detection pulse CP2 is referred to as CS1, and the detection signal CS2 is referred to as CS2. This detection signal CS is a voltage signal generated at both ends of the detection resistors R1 and R2 when an induced current from the drive coil 11 of the step motor 10 flows through the detection resistors R1 and R2.

  The determination circuit 29a receives the pair of detection signals CS, and will be described in detail later. However, the determination circuit 29a detects whether or not the detection signal CS exceeds the internal threshold value Vth, and counts the detection signal CS that exceeds the threshold value Vth. The rotation / non-rotation of the rotor 12 is determined and output as a determination signal P2.

[Description of Rotation Detection Operation by Driver Circuit and Rotation Detection Circuit: FIGS. 7 and 8A]
Next, an outline of the rotation detection operation of the rotor 12 by the driver circuit 28 and the rotation detection circuit 29 will be described with reference to timing charts of FIGS. 7 and 8A. Here, an example in which rotation detection is determined based on a detection signal CS generated on the output terminal O1 side will be described as a condition for explanation.

The timing chart of FIG. 8A shows the detection pulse CP, the induced current Ip generated from the drive coil 11, and the detection signal CS generated from the output terminal O1 side (coil terminal O1). Here, the detection pulse CP for detecting the rotation of the rotor 12 is output from the output terminals O1 and O2 of the driver circuit 28 as a signal having a short pulse width of a predetermined period during the rotation detection period. During this rotation detection period, the induced current Ip is generated from the drive coil 11 according to the rotation of the rotor 12.
Is generated in a substantially convex shape in the plus direction as shown in the figure.

  At this time, at the timing of the detection pulse CP, the transistor DP2 of the driver circuit 28 is turned on for a short time, and at the same time, the transistor TP1 of the rotation detection circuit 29 is turned on for a short time (see FIG. 7). Note that the other transistors are OFF. By this operation, the coil terminal O2 of the drive coil 11 is connected to the power supply VDD, and the detection resistor R1 is connected to the coil terminal O1 of the drive coil 11. That is, both ends (O1, O2) of the drive coil 11 are connected to the detection resistor R1 via the power supply VDD at the timing of the detection pulse CP.

  As a result, the induced current Ip generated in the drive coil 11 flows through the detection resistor R1 only during the short pulse width period of the detection pulse CP. As a result, the detection signal CS is output to the output terminal O1 as shown in FIG. appear. That is, the detection signal CS is a thin pulse voltage signal generated according to the magnitude of the induced current Ip at the timing of the detection pulse CP.

  The detection signal CS is input to the determination circuit 29a connected to the detection resistor R1, and the detection signal CS exceeding a predetermined threshold value Vth is counted. In the example shown in FIG. 8A, since the three detection signals CS exceed the threshold value Vth (indicated by a dotted line), the rotation detection circuit 29 stores information on the count 3, and the rotor 12 is based on this count value. Rotation / non-rotation is determined.

  When rotation detection is determined by the detection signal CS generated on the output terminal O2 side, although not shown, the transistor DP1 of the driver circuit 28 and the transistor TP2 of the rotation detection circuit 29 are turned on for a short time at the timing of the detection pulse CP. To do. By this operation, both ends of the drive coil 11 are connected to the detection resistor R2 via the power supply VDD at the timing of the detection pulse CP.

  As a result, the induced current Ip generated in the drive coil 11 flows to the detection resistor R2 at the timing of the detection pulse CP, the detection signal CS is generated at the output terminal O2, and is input to the determination circuit 29a connected to the detection resistor R2. Then, the detection signal CS exceeding the predetermined threshold value Vth is counted. Note that the voltage value of the threshold value Vth of the rotation detection circuit 29 is not limited, and may be appropriately adjusted according to the required detection sensitivity.

[Description of Micro Pulse, Detection Pulse, and Reverse Pulse of Third Embodiment: FIG. 9]
Next, the configuration of the minute pulse, detection pulse, and reverse pulse output in the third embodiment will be described with reference to FIG. In FIG. 9, the minute pulse MP of the third embodiment is composed of a first pulse MP1 and a second pulse MP2, as in the first and second embodiments.

  As in the second embodiment, the first pulse MP1 is output from the output terminal O1 of the driver circuit 6 to rotate and vibrate the rotor 12 of the step motor 10 in the reverse direction, and the second pulse MP2 is the driver circuit. 6 is output from the output terminal O2, and the rotor 12 is rotationally oscillated in the forward rotation direction. Since the configurations of the first pulse MP1 and the second pulse MP2 are the same as those in the first and second embodiments, description thereof will be omitted.

  After the output of the minute pulse MP, a rotation detection period TC in which the detection pulse CP is output is provided to detect the rotation of the rotor 12. The rotation detection period TC starts from 11.5 mS as an example and continues to a maximum of about 30 mS, starting from the output position T1 (left end in the drawing) of the minute pulse MP (first pulse MP1).

The detection pulse CP includes a first detection pulse CP1 output from the output terminal O1 on the same side as the first pulse MP1, and a second detection pulse CP2 output from the output terminal O2 on the same side as the second pulse MP2. The The periods of the first detection pulse CP1 and the second detection pulse CP2 are both 0.5 mS as an example, and are configured with a predetermined short pulse width. The output timings of the first detection pulse CP1 and the second detection pulse CP2 are deviated, and the second detection pulse CP2 is inserted (nested) between the first detection pulses CP1.

  In addition, an output period of the reverse rotation pulse FP is provided in preparation for the case where it is determined that the rotor 12 has rotated by the rotation detection operation in the rotation detection period TC. The reverse pulse FP is rotated when the rotor 12 is rotated and oscillated by the minute pulse MP and is rotated by one step in the normal rotation direction due to the influence of battery voltage fluctuations (error rotation). This is a drive pulse output for returning one step.

  The reverse pulse FP is provided after 32 mS as an example, starting from the output position T1 of the minute pulse MP. As shown in the figure, the reverse pulse FP is a drive pulse having a complicated configuration that is output from both of the output terminals O1 and O2. However, since the configuration of the reverse pulse is known, the description thereof is omitted here. In addition, after the end of the output period of the reverse rotation pulse FP, after a predetermined time has elapsed, the minute pulse MP output and the rotation detection period TC are continued again from the output position T1, and the rotational vibration operation of the rotor 12 is repeated.

  Further, when it is determined by the rotation detection operation in the rotation detection period TC that the rotor 12 is not rotating, for example, the output of the minute pulse MP and the rotation detection period TC are repeated with a repetition period Pe = 32 mS. In this case, the repetitive operation of the minute pulse MP is the same as the operation of the second embodiment described above (see FIG. 4).

[Description of Fan-Shaped Vibration Operation of Third Embodiment: FIGS. 10 to 12]
Next, the fan-shaped vibration operation of the third embodiment will be described with reference to FIGS. FIG. 10 shows an operation flow of one cycle of the sector vibration (rotor vibration of the rotor) of the third embodiment, and FIG. 11 is a timing chart of the rotation detection operation in the case of erroneous rotation by one step due to the rotation vibration of the rotor. FIG. 12 is a timing chart of the rotation detection operation when the rotational vibration of the rotor is normal (non-rotation). The configuration of the electronic timepiece 20 of the third embodiment refers to the configuration diagram of FIG. 6, and the configuration of each pulse for driving the step motor 10 refers to the waveform diagram of FIG.

  In the operation flow of FIG. 10, when the electronic timepiece 20 (see FIG. 6) causes the pointer to vibrate in a sector shape, the control circuit 22 outputs the control signal CN6 to start the minute pulse generation circuit 26, and the minute pulse generation circuit 26 Then, a predetermined minute pulse MP is generated and output. The selector circuit 27 selects the minute pulse MP and outputs a select signal SL1 based on the minute pulse MP to the driver circuit 28. The driver circuit 28 outputs the first pulse MP1 and the first pulse MP1 constituting the minute pulse MP from the output terminals O1 and O2. Two pulses MP2 are output, and the rotor 12 of the step motor 10 is rotated and oscillated (ST1: minute pulse output).

  11 and 12, the first pulse MP1 is output from the output terminal O1, and the second pulse MP2 is output from the output terminal O2 (operation ST1). Here, the configuration of the first pulse MP1 and the second pulse MP2 refers to the waveform diagram of FIG. 9 described above. The current I indicates a current flowing through the drive coil 11 of the step motor 10. The minus-side coil current Ic1 flows by the first pulse MP1, and the plus-side coil current Ic2 flows by the second pulse MP2.

Next, in the operation flow (FIG. 10), after the minute pulse MP output (ST1) ends, the control circuit 22 starts the rotation detection period TC, outputs the control signal CN5, and activates the detection pulse generation circuit 25, The detection pulse generation circuit 25 generates a first detection pulse CP1 and outputs it to the selector circuit 27. The selector circuit 27 selects the first detection pulse CP 1 and outputs select signals SL 1 and SL 2 to the driver circuit 28 and the rotation detection circuit 29. Accordingly, the first detection pulse CP1 is output from the output terminal O1 of the driver circuit 28, and the first detection signal CS1 corresponding to the induced current generated in the drive coil 11 is generated by the first detection pulse CP1 (ST2: rotation). Start detection).

  Next, the rotation detection circuit 29 inputs the first detection signal CS1 corresponding to the induced current Ip generated in the drive coil 11 by the rotation of the rotor 12, and the height of the pulsed first detection signal CS1 is an internal threshold value. It is determined whether or not Vth is exceeded (ST3: Is the first detection signal present?).

  Here, if the first detection signal CS1 does not exceed a predetermined number (for example, three shots) within a predetermined period (within 30 ms as an example from T1) (determination N), the rotor 12 is determined to be non-rotating. Then, the rotation detection period TC is stopped, and one cycle of the sector vibration is ended (END). If the first detection signal CS1 exceeds the threshold value Vth by a predetermined number (for example, three) within a predetermined period (determination Y), the process proceeds to the next step ST4.

  Next, in step ST4, the detection pulse generation circuit 25 stops the first detection pulse CP1, generates the second detection pulse CP2, and outputs the second detection pulse CP2 from the output terminal O2 of the driver circuit 28. The rotation detection circuit 29 inputs the second detection signal CS2 corresponding to the induced current Im generated in the drive coil 11 by the rotation of the rotor 12, and the height of the pulsed second detection signal CS2 exceeds the internal threshold value Vth. (ST4: Is there a second detection signal?).

  Here, if the second detection signal CS2 exceeds the threshold value Vth within a predetermined period (within 30 ms as an example from T1) (eg, two shots) (determination Y), the control circuit 22 Is determined to have erroneously rotated by one step, and the process proceeds to step ST5 in order to output the reverse rotation pulse FP.

  In step ST5, the control circuit 22 ends the rotation detection period TC, and then outputs the control signal CN4 to start the reverse pulse generation circuit 24. The reverse pulse generation circuit 24 generates the reverse pulse FP and selects it. Output to the circuit 27. The selector circuit 27 selects the reverse rotation pulse FP and outputs the select signal SL1 to the driver circuit 28. The predetermined reverse rotation pulse FP is output from the output terminals O1 and O2 of the driver circuit 28, and the rotor 12 reverses and returns one step. The erroneous rotation that has been advanced by one step due to the rotational vibration is corrected (ST5: reverse pulse output).

  Further, if the second detection signal CS2 does not exceed the threshold value Vth within a predetermined period (for example, two shots) within a predetermined period (determination N) (determination N), the control circuit 22 does not rotate the rotor 12 by one step (step ST4). The rotation detection period TC is determined as non-rotation) (ST7: end of rotation detection).

  11 and 12, the rotation detection period TC starts, the first detection pulse CP1 is output from the output terminal O1, and the first detection according to the induced current Ip generated in the drive coil 11 by the first detection pulse CP1. Indicates that signal CS1 is generated.

  Here, the operation in the rotation detection period TC shown in FIG. 11 indicates an operation in the case where the rotor 12 erroneously rotates one step in the forward rotation direction due to the rotational vibration. In this rotation detection period TC, first, the first detection pulse CP1 is output from the output terminal O1, and when a positive induced current Ip (indicated by a right-up hatching) is generated in the drive coil 11 by the rotational vibration of the rotor 12, The first detection signal CS1 is generated at the output terminal O1 at the timing of the first detection pulse CP1 according to the induced current Ip.

  When the first detection signal CS1 exceeds the threshold value Vth (indicated by a dotted line) of the rotation detection circuit 29 three times, the determination is YES in step ST3 described above, and the second detection is performed from the output terminal O2 instead of the first detection pulse CP1. Pulse CP2 is output. At this time, since the rotor 12 exceeds the holding torque peak position B (see FIG. 5), a negative-side induced current Im (shown by right-down hatching) is generated in the drive coil 11, and the first current is impressed according to the induced current Im. The second detection signal CS2 is generated at the timing of the two detection pulses CP2.

  When the second detection signal CS2 exceeds the threshold value Vth (indicated by a dotted line) of the rotation detection circuit 29 by two shots, a determination Y is made in step ST4 described above and the reverse rotation pulse FP is output. As described above, when the rotor 12 is erroneously rotated by one step due to the minute pulse MP, the rotation of the rotor 12 is detected, and the rotor 12 can be returned by one step by outputting the reverse rotation pulse FP. In FIG. 11, the reverse rotation pulse FP is not shown.

  In this manner, the rotation detection circuit 29 first detects the positive induced current Ip by the first detection signal CS1, and then detects the negative induced current Im by the second detection signal CS2. 12 is determined to have rotated one step. Since this rotor rotation detection method is a known technique, a detailed description thereof will be omitted.

  Further, the operation in the rotation detection period TC shown in FIG. 12 shows an operation when the rotational vibration of the rotor 12 is normal and the rotor 12 does not rotate one step (non-rotation). In this rotation detection period TC, first, a first detection pulse CP1 is output from the output terminal O1, and when a positive induced current Ip (indicated by a right-up hatching) is generated in the drive coil 11 by the rotational vibration of the rotor 12, The first detection signal CS1 is generated at the timing of the first detection pulse CP1 according to the induced current Ip.

  When the first detection signal CS1 exceeds the threshold value Vth (indicated by a dotted line) of the rotation detection circuit 29 three times, the determination is YES in step ST3 described above, and the second detection is performed from the output terminal O2 instead of the first detection pulse CP1. Pulse CP2 is output. At this time, since the rotor 12 is not rotating and does not exceed the holding torque peak position B (see FIG. 5), the plus-side induced current Ip continues gently and within a predetermined period (within about 30 mS from T1). The second detection signal CS2 exceeding the threshold value Vth (indicated by a dotted line) of the rotation detection circuit 29 is not generated. As a result, the determination N is made in step ST4 described above, the rotation detection period TC ends, and the reverse rotation pulse FP is not output.

  Next, in the operation flow (FIG. 10), after the reverse rotation pulse FP is output in step ST5, the fact that the rotor 12 has rotated by one step is considered to be caused by the large driving force of the minute pulse MP. 22 outputs a control signal CN7 to control the rank selection circuit 30. The rank selection circuit 30 outputs a rank signal RK in order to reduce the driving force of the minute pulse MP.

  The minute pulse generating circuit 26 is set to receive the rank signal RK, select a driving force that is one rank lower than the current driving force, and output the next minute pulse MP (ST6: 1 rank down). 1 cycle is ended (END). By this step ST6, the frequency at which the rotor 12 erroneously rotates one step can be reduced.

  Further, if the fan-shaped vibration is continued with the minute pulse MP of the same rank, the driving force of the minute pulse MP is lowered due to the influence of the battery voltage or the like, and the amplitude E of the fan-shaped vibration (FIG. 5). It is conceivable that the visibility of the fan-shaped vibration deteriorates due to a small reference). In order to avoid this phenomenon, the control circuit 22 determines whether or not the non-rotation determination has continued a predetermined number of times (for example, 256 times) after the end of the rotation detection in step ST7 (ST8: 256 non-rotation? ).

  Here, if the determination is Y, the driving power of the minute pulse MP may be reduced. Therefore, the rank selection circuit 30 is controlled to reduce the driving power of the minute pulse generation circuit 26 by one rank from the current rank. Set higher (ST9: 1 rank up). By this operation, it is possible to prevent a decrease in the amplitude E of the fan-shaped vibration and to keep the visibility of the fan-shaped vibration good. If it is determined as N in step ST8, it is determined that no rank change is necessary, and one cycle of the sector vibration is terminated.

  Next, FIG. 8B shows an example of a rank table of the driving force of the minute pulse MP selected by the rank selection circuit 30. In FIG. 8B, the rank of the driving force is in four stages of rank 0 to rank 3, and the duty of the first pulse MP1 and the second pulse MP2 is set, respectively. Rank 0 is the rank with the smallest driving force, the duty of the first pulse MP1 is 14/32, and the duty of the second pulse MP2 is 6/32.

  Rank 3 is the rank with the largest driving force, the duty of the first pulse MP1 is 17/32, and the duty of the second pulse MP2 is 9/32. Thus, the selection of the driving force of the minute pulse MP can be realized by changing the respective duties of the first pulse MP1 and the second pulse MP2.

  If the current rank is 0 and the rank is down by 1 (ST6), rank 0 is continued. If the current rank is 3 and the rank is increased by 1 (ST9), rank 3 is continued. The rank of the driving force of the minute pulse MP is not limited to four stages, and the duty of each rank can be arbitrarily set according to the performance of the step motor and the like.

  In the operation flow (FIG. 10), when one cycle of the fan-shaped vibration operation ends (END) and the rotational vibration of the rotor 12 is continued at the repetition cycle Pe = 32 mS, the operation is performed after 32 mS has elapsed from the first output position T1. Returning to the start of the flow, step ST1 is executed again, a minute pulse MP is output, and the pointer continues fan-shaped vibration at a cycle of 32 mS.

As described above, according to the third embodiment, after outputting a set of minute pulses MP, the state of rotational vibration of the rotor 12 is detected by the rotation detection period TC, and the rotor 12 rotates one step by mistake. The erroneous rotation is detected, and the rotor 12 can be returned by one step by the reverse rotation pulse FP. As a result, even if the driving force of the minute pulse MP changes due to battery voltage fluctuation or the like and the rotor 12 rotates erroneously, the pointer can be immediately returned to the normal position. Can provide an electronic watch.

  In addition, since the driving force of the minute pulse MP can be selected and adjusted as necessary, the amplitude of the sector vibration can be stabilized, the sector vibration excellent in visibility can be realized, and the occurrence frequency of erroneous rotation of the rotor 12 can be reduced. Can do. In particular, when a secondary battery is used as a power source as in a solar wristwatch, the battery voltage fluctuates greatly, so that this embodiment can provide a great effect.

[Fourth Embodiment]
[Configuration of Electronic Timepiece of Fourth Embodiment: FIG. 13]
Next, a schematic configuration of the electronic timepiece according to the fourth embodiment will be described with reference to FIG. The fourth embodiment is an application example in which a rotation detection function is added to the first embodiment described above. The basic configuration of the electronic timepiece according to the fourth embodiment is the same as that of the electronic timepiece 20 according to the third embodiment described above. Only the elements are described.

In FIG. 13, reference numeral 40 denotes an analog display type electronic timepiece according to the fourth embodiment. As in the third embodiment, the electronic timepiece 40 includes an oscillation circuit 21, a control circuit 22, a drive pulse generation circuit 23, a reverse pulse generation circuit 24, a detection pulse generation circuit 25, a selector circuit 27, a driver circuit 28, and a rotation detection. The circuit 29, the rank selection circuit 30, and the step motor 10 are included, and the minute pulse generation circuit 41, which is a feature of the present embodiment, is included. The electronic timepiece 40 includes a display unit such as hands, a train wheel, a power source, an operation member, and the like, which are not shown here.

  The minute pulse generation circuit 41 is configured to be separated into a first pulse generation circuit 42 and a second pulse generation circuit 43, and inputs the control signals CN6a and CN6b from the control circuit 22 respectively to cause the pointer to vibrate in a fan shape. The first pulse MP1 and the second pulse MP2 are individually generated and output to the selector circuit 27.

  Since the rank selection circuit 30 is configured by separating the minute pulse generation circuit 41 as described above, the first rank signal RK1 for selecting the rank of the first pulse generation circuit 42 and the second pulse generation circuit. The second rank signal RK2 for selecting 43 ranks is individually output.

[Explanation of Minute Pulse, Detection Pulse, and Reverse Pulse of Fourth Embodiment: FIG. 14]
Next, the configuration of a minute pulse, a detection pulse, and a reverse pulse output in the fourth embodiment will be described with reference to FIG. In FIG. 14, the minute pulse MP of the fourth embodiment is composed of the first pulse MP1 and the second pulse MP2 as in the first to third embodiments. The pulse MP1 and the second pulse MP2 are characterized by being output individually.

  Here, the first pulse MP1 is output from the output terminal O2 of the driver circuit 6 to rotate and vibrate the rotor 12 of the step motor 10 in the forward rotation direction, and the second pulse MP2 is output from the output terminal O1 of the driver circuit 6. Thus, the rotor 12 is rotated and vibrated in the reverse direction. In addition, since each structure of 1st pulse MP1 and 2nd pulse MP2 is the same as that of 1st Embodiment, description is abbreviate | omitted.

  A rotation detection period TC in which a detection pulse CP for detecting the rotation of the rotor 12 is output is provided in the period between the first pulse MP1 and the second pulse MP2. The rotation detection period TC starts from 4.5 mS as an example and continues to a maximum of 24 mS, starting from the output position T1 of the first pulse MP1. On the other hand, the second pulse MP2 is output from 25 mS as an example, starting from the output position T1 of the first pulse MP1.

  The detection pulse CP output in the rotation detection period TC is composed of a first detection pulse CP1 and a second detection pulse CP2, and the first detection pulse CP1 is output to an output terminal O1 on a different side from the first pulse MP1. The second detection pulse CP2 is output to the output terminal O2 on the same side as the first pulse MP1. Since the period and output timing of the first detection pulse CP1 and the second detection pulse CP2 are the same as those in the third embodiment, description thereof is omitted.

  If it is determined by the rotation detection operation in this rotation detection period TC that the rotor 12 has erroneously rotated by one step, the second pulse MP2 is not output, but the reverse rotation pulse FP is output instead. The output period of the reverse pulse FP is provided after 32 mS as an example, starting from the output position T1 of the first pulse MP1. The configuration of the reverse pulse FP is well known and is the same as that of the third embodiment, so that the description thereof is omitted.

  Further, when it is determined by the rotation detection operation in the rotation detection period TC that the rotor 12 is not rotating, as an example, the output of the first pulse MP1, the detection pulse CP, and the second pulse MP2 with a repetition period Pe = 32 mS. Is repeated.

[Description of Fan-Shaped Vibration Operation of Fourth Embodiment: FIGS. 15 to 17]
Next, the fan-shaped vibration operation of the fourth embodiment will be described with reference to FIGS. FIG. 15 shows an operation flow of one cycle of the fan-shaped vibration (rotor vibration of the rotor) of the fourth embodiment, and FIG. 16 is a timing chart of the rotation detection operation in the case of erroneous rotation by one step due to the rotation vibration of the rotor. FIG. 17 is a timing chart of the rotation detection operation when the rotational vibration of the rotor is normal (non-rotation). The configuration of the electronic timepiece 40 of the fourth embodiment is referred to the configuration diagram of FIG. 13, and the configuration of each pulse for driving the step motor 10 is referred to the waveform diagram of FIG.

  In the operation flow of FIG. 15, when the electronic timepiece 40 (see FIG. 13) causes the pointer to vibrate in a sector shape, the control circuit 22 outputs the control signal CN 6 a to activate the first pulse generation circuit 42 of the minute pulse generation circuit 41. The first pulse generation circuit 42 generates and outputs a first pulse MP1. The selector circuit 27 selects the first pulse MP1 and outputs the select signal SL1 to the driver circuit 28. The driver circuit 28 outputs the first pulse MP1 from the output terminal O2, and the step motor 10 is finely driven in the forward rotation direction. (ST10: first pulse output).

  16 and 17 indicate that the first pulse MP1 is output from the output terminal O2 (operation of ST10). The coil current Ic1 indicates a positive current that flows through the drive coil 11 of the step motor 10 by the first pulse MP1.

  Next, in the operation flow (FIG. 15), after the first pulse MP1 output (ST10) ends, the control circuit 22 starts the rotation detection period TC, and the driver circuit 28 outputs the first detection pulse CP1 from the output terminal O1. Then, the rotation detection operation of the rotor 12 is started (ST11: rotation detection start).

  Next, the rotation detection circuit 29 inputs the first detection signal CS1 corresponding to the induced current Ip generated in the drive coil 11 by the rotation of the rotor 12, and the height of the first detection signal CS1 exceeds the internal threshold value Vth. (ST12: Is the first detection signal present?).

  Here, if the first detection signal CS1 does not exceed a predetermined number (for example, three shots) within a predetermined period (within 24 ms as an example from T1) (determination N), the rotor 12 is assumed to be non-rotating. Determination is made to stop the rotation detection period TC, and one cycle of the sector vibration is ended (END). If the first detection signal CS1 exceeds the threshold value Vth within a predetermined period (eg, 3 shots) (determination Y), the process proceeds to the next step ST13.

  Next, in step ST13, the detection pulse generation circuit 25 generates the second detection pulse CP2, and outputs the second detection pulse CP2 from the output terminal O2 of the driver circuit 28. The rotation detection circuit 29 receives the second detection pulse CP2 corresponding to the induced current Im generated in the drive coil 11 by the rotation of the rotor 12, and whether or not the height of the second detection signal CS2 exceeds the internal threshold value Vth. (ST13: Is there a second detection signal?).

  Here, if the second detection signal CS2 exceeds the threshold value Vth within a predetermined period (within about 24 mS from T1) (eg, 2 shots) (determination Y), the control circuit 22 indicates that the rotor 12 is 1 It is determined that the step is erroneously rotated, and the process proceeds to step ST14 in order to output the reverse rotation pulse FP. Note that the operations in steps ST14 and ST15 are the same as those in steps ST5 and ST6 (see FIG. 10) of the third embodiment described above, and a description thereof will be omitted.

  In addition, if the second detection signal CS2 does not exceed the threshold value Vth within a predetermined period (within about 24 mS from T1) in step ST13 (determination N), for example, the control circuit 22 It is determined that there is no rotation and the rotation detection period TC ends (ST16: rotation detection end).

  Next, in order to output the second pulse MP2 to the step motor 10, the control circuit 22 outputs the control signal CN6b to start the second pulse generation circuit 43 of the minute pulse generation circuit 41, and the second pulse generation circuit 43. Generates and outputs a second pulse MP2. The selector circuit 27 selects the second pulse MP2 and outputs the select signal SL1 to the driver circuit 28. The driver circuit 28 outputs the second pulse MP2 from the output terminal O1, and rotates the rotor 12 of the step motor 10 in the reverse direction. Micro-drive (ST17: second pulse output).

  Since the operations in steps ST18 and ST19 after the output of the second pulse MP2 in step ST17 are the same as those in steps ST8 and ST9 (see FIG. 10) of the third embodiment described above, description thereof is omitted. The rank down and rank up operations for selecting the driving force of the minute pulse MP in steps ST15 and ST19 can use the rank table (FIG. 8B) shown in the third embodiment. it can.

  16 and 17, the first detection pulse CP1 is output from the output terminal O1 during the rotation detection period TC, and the first detection signal CS1 corresponding to the induced current Ip generated in the drive coil 11 by the first detection pulse CP1 is obtained. Indicates that it occurs.

  Here, the operation in the rotation detection period TC shown in FIG. 16 shows an operation in the case where the rotor 12 rotates one step in the forward rotation direction due to rotational vibration after the first pulse MP1 is output. In this rotation detection period TC, when a positive induced current Ip (indicated by a right-up hatching) is generated in the drive coil 11 due to the rotational vibration of the rotor 12, the timing of the first detection pulse CP1 according to the induced current Ip. A first detection signal CS1 is generated at the output terminal O1.

  When the first detection signal CS1 exceeds the threshold value Vth (indicated by a dotted line) of the rotation detection circuit 29 three times, the determination is YES in step ST12 described above, and the second detection is performed from the output terminal O2 instead of the first detection pulse CP1. Pulse CP2 is output. At this time, since the rotor 12 exceeds the holding torque peak position B (see FIG. 5), a negative-side induced current Im (shown by right-down hatching) is generated in the drive coil 11, and the first current is impressed according to the induced current Im. The second detection signal CS2 is generated at the timing of the two detection pulses CP2.

  When the second detection signal CS2 exceeds the threshold value Vth (indicated by a dotted line) of the rotation detection circuit 29 by two shots, a determination Y is made in step ST13 described above, and the reverse rotation pulse FP is output. As described above, when the rotor 12 is erroneously rotated by one step due to the first pulse MP1, it is possible to return the rotor 12 by one step by detecting the rotation of the rotor 12 and outputting the reverse rotation pulse FP. In FIG. 16, the reverse pulse FP is not shown.

  Further, the operation in the rotation detection period TC shown in FIG. 17 shows an operation when the rotation vibration of the rotor 12 is normal after the first pulse MP1 is output and the rotation does not rotate one step (non-rotation). In this rotation detection period TC, when a positive induced current Ip (indicated by a right-up hatching) is generated in the drive coil 11 due to the rotational vibration of the rotor 12, the timing of the first detection pulse CP1 according to the induced current Ip. A first detection signal CS1 is generated at the output terminal O1.

When the first detection signal CS1 exceeds the threshold value Vth (indicated by a dotted line) of the rotation detection circuit 29 three times, the determination is YES in step ST12 described above, and the second detection is performed from the output terminal O2 instead of the first detection pulse CP1. Pulse CP2 is output. At this time, since the rotor 12 is not rotating and does not exceed the holding torque peak position B (see FIG. 5), the plus-side induced current Ip continues gently and within a predetermined period (within about 24 mS from T1). The second detection signal CS2 exceeding the threshold value Vth (indicated by a dotted line) of the rotation detection circuit 29 is not generated. As a result, in Step ST13 described above, the determination is N, the rotation detection period TC ends, the reverse rotation pulse FP is not output,
A second pulse MP2 for minutely driving the rotor 12 in the reverse direction is output from the output terminal O1 (ST17).

  In the operation flow (FIG. 15), when one cycle of the fan-shaped vibration operation ends (END) and the rotational vibration of the rotor 12 continues, the operation flow returns to the start as in the third embodiment. The fan-shaped vibration operation is repeated again.

  As described above, according to the fourth embodiment, the first pulse MP1 and the second pulse MP2 of the minute pulse MP that rotationally vibrates the rotor 12 of the step motor 10 are separated and output individually, and the first pulse MP1 and By providing the rotation detection period TC in the gap between the second pulses MP2, it is possible to detect whether or not the rotor 12 has erroneously rotated one step in the forward rotation direction by the first pulse MP1.

  As a result, when the driving force of the first pulse MP1 changes due to battery voltage fluctuation or the like, and the rotor 12 that is oscillating rotationally rotates one step by mistake, the erroneous rotation is detected, and instead of the second pulse MP2. Since the rotor 12 can be reversed one step by the reverse pulse FP and the rotor 12 can be returned to the normal position, an electronic timepiece having display means by fan-shaped vibration of the pointer without malfunction can be provided. Further, as in the third embodiment, since the driving force of the minute pulse MP can be selected and adjusted as necessary, the amplitude of the sector vibration can be stabilized, the sector vibration excellent in visibility can be realized, and the rotor 12 can be realized. The occurrence frequency of false rotation can be reduced.

[Fifth Embodiment]
[Description of Configuration of Electronic Timepiece of Fifth Embodiment: FIG. 13]
Next, the configuration of the electronic timepiece of the fifth embodiment will be described. The fifth embodiment is an application example of the above-described fourth embodiment. The configuration of the electronic timepiece of the fifth embodiment is the same as the configuration of the electronic timepiece 40 of the above-described fourth embodiment (see FIG. 13). ), The description of the configuration is omitted.

[Explanation of Minute Pulse, Detection Pulse, and Reverse Pulse of Fifth Embodiment: FIG. 18]
Next, the configuration of the minute pulse, detection pulse, and reverse pulse output in the fifth embodiment will be described with reference to FIG. In FIG. 18, the minute pulse MP of the fifth embodiment is the same as that of the fourth embodiment, and the first pulse MP1 and the second pulse MP2 are separated and output individually.

  In the above-described fourth embodiment, the positional relationship between the first pulse MP1 and the second pulse MP2 is fixed, and the second pulse MP2 is output from 25 mS starting from the output position T1 of the first pulse MP1. However, in the present embodiment, the output position of the second pulse MP2 is controlled to be changed according to the rotational vibration state of the rotor 12 by the first pulse MP1.

  A rotation detection period TC in which a detection pulse CP for detecting the rotation of the rotor 12 is output is provided in the gap period between the first pulse MP1 and the second pulse MP2, as in the fourth embodiment. ing. The rotation detection period TC starts at 4.5 mS as an example, starting from the output position T1 of the first pulse MP1, and the end position varies.

  As in the fourth embodiment (see FIG. 14), the detection pulse CP output during the rotation detection period TC is composed of a first detection pulse CP1 and a second detection pulse CP2, and the first detection pulse CP1 The second detection pulse CP2 is output to the output terminal O2 on the same side as the first pulse MP1. Since the period and output timing of the first detection pulse CP1 and the second detection pulse CP2 are the same as those in the third embodiment, description thereof is omitted.

  If it is determined by the rotation detection operation in the rotation detection period TC that the rotor 12 is not rotating, the second pulse MP2 is output following the first pulse MP1. Although the output position of the second pulse MP2 varies, the details will be described later. Further, after the output of the second pulse MP2 is completed, the output returns to the output position T1 of the first pulse MP1 again, and the output of the minute pulse MP is repeated.

  Further, when it is determined by the rotation detection operation in the rotation detection period TC that the rotor 12 has erroneously rotated by one step, the second pulse MP2 is not output and the reverse rotation pulse FP is output instead. Since the output position of the reverse rotation pulse FP is the same as in the third and fourth embodiments, description thereof is omitted.

  Thus, in the fifth embodiment, the rotation detection period TC is inserted in the gap between the first pulse MP1 and the second pulse MP2, and the output position of the second pulse MP2 varies, but the first pulse MP1, The repetition period Pe of a series of pulse trains of the detection pulse CP and the second pulse MP2 is constant, and is 32 mS as an example as in the fourth embodiment.

[Description of Fan-Shaped Vibration Operation of Fifth Embodiment: FIGS. 19 to 22]
Next, the fan-shaped vibration operation of the fifth embodiment will be described with reference to FIGS. FIG. 19 shows an operation flow of one cycle of the sector vibration (rotational vibration of the rotor) of the fifth embodiment, and FIG. 20 is a timing chart of the rotation detection operation when the driving force of the minute pulse MP is relatively large. FIG. 21 is a timing chart of the rotation detection operation when the driving force of the minute pulse MP is relatively small. FIG. 22 is a timing chart of the rotation detection operation in the case where the rotor 12 rotates erroneously by one step due to rotational vibration because the driving force of the minute pulse MP is too large.

  The configuration of the fifth embodiment refers to the configuration diagram of the fourth embodiment (FIG. 13), and the configuration of each pulse for driving the step motor 10 refers to the waveform diagram of FIG. In addition, with regard to the operation flow and each pulse, the description overlapping with the above-described embodiments is omitted.

  In FIG. 19, steps ST20 and ST21 are the same as steps ST10 and ST11 in the operation flow (see FIG. 15) of the above-described fourth embodiment, and a description thereof will be omitted.

  By performing steps ST20 and ST21, in FIG. 20 to FIG. 22, a first pulse MP1 is output from the output terminal O2, and a positive coil current Ic1 flows through the drive coil 11 by the first pulse MP1. In addition, the first detection pulse CP1 is output from the output terminal O1 in the subsequent rotation detection period TC.

  Next, in the operation flow (FIG. 19), in step ST22, the rotation detection circuit 29 inputs the first detection signal CS1 corresponding to the induced current Ip generated in the drive coil 11 by the rotational vibration of the rotor 12, and the first detection signal. It is determined whether or not the height of CS1 exceeds the internal threshold value Vth (ST22: Is the first detection signal present?).

  Here, if the first detection signal CS1 does not exceed the threshold value Vth within a predetermined period (eg, 3 shots) (determination N), the rotor 12 is determined to be non-rotating, and the rotation detection period TC is stopped. Then, one cycle of the sector vibration operation is ended (END). If the first detection signal CS1 exceeds the threshold value Vth within a predetermined period (eg, 3 shots) (determination Y), the process proceeds to the next step ST23.

Next, in step ST23, the detection pulse generation circuit 25 continuously outputs the first detection pulse CP1, and the rotation detection circuit 29 continuously counts the number of first detection signals CS1 exceeding the threshold value Vth. . When the induced current Ip decreases and the first detection signal CS1 does not exceed the threshold value Vth, the count value of the first detection signal CS1 is stored, and the detection pulse generation circuit 25 detects the first detection pulse CP1. The output is stopped (ST23: CP1 continuous output).

  Next, the detection pulse generation circuit 25 generates the second detection pulse CP2, outputs the second detection pulse CP2 from the output terminal O2 of the driver circuit 28, and the rotation detection circuit 29 inputs the second detection signal CS2. It is determined whether or not the second detection signal CS2 exceeds the threshold value Vth (ST24: is the second detection signal present)?

  Here, if the second detection signal CS2 exceeds the threshold value Vth within a predetermined period (for example, two shots) (determination Y), it is determined that the rotor 12 has rotated one step erroneously, and the rotation detection period TC And the reverse pulse FP is output (step ST25), and the rank of the minute pulse MP is lowered by 1 (step ST26). The operations in steps ST25 and ST26 are the same as those in steps ST5 and ST6 (see FIG. 10) of the third embodiment described above, and detailed description thereof is omitted. In addition, since the determination in step ST24 is Y, the count value of the first detection signal CS1 is discarded.

  Further, after the output of the first detection pulse CP1 is stopped in step ST24 (ST23), the second detection signal CS2 has the threshold value Vth even if a certain time elapses (for example, six second detection pulses CP2 are output). If the predetermined number (for example, two) is not exceeded (determination N), the control circuit 22 determines that the rotor 12 is not rotating, stops the output of the second detection pulse CP2, and ends the rotation detection period TC. (ST27: End of rotation detection).

  Next, the control circuit 22 outputs a control signal CN6b to output the second pulse MP2 to the step motor 10 after a predetermined time (for example, after 1 mS) after the rotation detection period TC ends and outputs a minute pulse generation circuit. 41, the second pulse generating circuit 43 generates and outputs the second pulse MP2, and the driver circuit 28 outputs the second pulse MP2 from the output terminal O1, and the step motor 10 is rotated and oscillated in the reverse direction (ST28: second pulse output according to CS1).

  As described above, the output of the second pulse MP2 is output after a predetermined time has elapsed since the first detection signal CS1 does not exceed the threshold value Vth and the output of the first detection pulse CP1 is stopped. That is, the output position of the second pulse MP2 is changed according to the detection position where the first detection signal CS1 generated at the timing of the first detection pulse CP1 does not exceed the threshold value Vth by the induced current Ip.

  For example, if the generation period of the induced current Ip continues long, the detection position of the first detection signal CS1 is delayed, and the output position of the second pulse MP2 is also delayed. Further, if the generation period of the induced current Ip is short, the detection position of the first detection signal CS1 is advanced, and the output position of the second pulse MP2 is also accelerated.

  The output position of the second pulse MP2 will be described in detail with reference to the timing charts of FIGS. First, the output position of the second pulse MP2 when the driving force of the minute pulse MP is relatively large will be described with reference to FIG. In FIG. 20, when the detection pulse CP1 is output in the rotation detection period TC after the output of the first pulse MP1, a positive induced current Ip (indicated by a right-up hatching) is applied to the drive coil 11 due to the rotation of the rotor 12. When generated, the first detection signal CS1 is generated at the timing of the first detection pulse CP1 in accordance with the induced current Ip.

  Note that FIG. 20 shows the case where the driving force of the minute pulse MP is relatively large as described above, and therefore the rotational vibration of the rotor 12 of the step motor 10 fluctuates greatly, and therefore the generation of the induced current Ip is relatively long. Continue for a period.

  If the first detection signal CS1 exceeds the threshold value Vth (indicated by a dotted line) of the rotation detection circuit 29 three times, the determination is YES in step ST22 described above, and the second detection pulse CP2 is output from the output terminal O2. (Arrow K1). The second detection pulse CP2 is a detection pulse for detecting the negative induced current Im. On the other hand, the output of the first detection pulse CP1 continues, the first detection signal CS1 continues to exceed the threshold value Vth (indicated by a dotted line) according to the induced current Ip generated on the plus side, and the first detection signal CS1 continues. Be counted.

  Next, the output of the first detection pulse CP1 is output at the second time of the first detection pulse CP1 after the induced current Ip decreases and the first detection signal CS1 does not exceed Vth before 20 mS on the time axis of FIG. This position is referred to as a detection position of the first detection signal CS1.

  If the second detection signal CS2 is not detected by the negative induced current Im during a predetermined number (for example, six) of second detection pulses CP2 from the detection position (arrow K2) of the first detection signal CS1, the second detection pulse CS2 is detected. The detection pulse CP2 is stopped, and after about 1 mS, the second pulse MP2 is output from the output terminal O1 (arrow K3). The reason why the second detection pulse CP2 is counted a predetermined number after the output of the first detection pulse CP1 is stopped is to check whether the second detection signal CS2 is generated (that is, whether the rotor 12 is not rotating). .

  Here, starting from the output position T1 of the first pulse MP1, the output position T2 of the second pulse MP2 is about 23 mS later as an example. The number of detections (count value) of the first detection signal CS1 is 19 as an example. Thus, the output position T2 of the second pulse MP2 is changed depending on the position (detection position) where the first detection signal CS1 is no longer detected.

  Next, the output position of the second pulse MP2 when the driving force of the minute pulse MP is relatively small will be described with reference to FIG. In FIG. 21, when the detection pulse CP1 is output in the rotation detection period TC after the output of the first pulse MP1, a positive induced current Ip (indicated by right-up hatching) is applied to the drive coil 11 due to the rotation of the rotor 12. When generated, the first detection signal CS1 is generated at the timing of the first detection pulse CP1 in accordance with the induced current Ip.

  Note that FIG. 21 shows the case where the driving force of the minute pulse MP is relatively small as described above. Therefore, the rotational vibration of the rotor 12 of the step motor 10 fluctuates little, and therefore the generation of the induced current Ip is relatively short. It becomes a period.

  Here, when the first detection signal CS1 exceeds the threshold value Vth (indicated by a dotted line) of the rotation detection circuit 29 three times, the determination is YES in step ST22 described above, and the second detection pulse CP2 is output from the output terminal O2. (Arrow K4). On the other hand, the output of the first detection pulse CP1 continues, the first detection signal CS1 continues to exceed the threshold value Vth (indicated by a dotted line) according to the induced current Ip generated on the plus side, and the first detection signal CS1 continues. Be counted.

Next, in the vicinity of 10 mS on the time axis of FIG. 21, the first detection pulse CP1 is detected at the second detection pulse CP1 after the induced current Ip decreases and the first detection signal CS1 does not exceed Vth. Is stopped (detection position of the first detection signal CS1). If the second detection signal CS2 is not detected during counting a predetermined number (for example, six) of the second detection pulse CP2 from the detection position (arrow K5) of the first detection signal CS1, the second detection pulse CP2 is stopped, After about 1 mS, the second pulse MP2 is output from the output terminal O1 (arrow K6).
Here, starting from the output position T1 of the first pulse MP1, the output position T2 of the second pulse MP2 is about 15 mS later as an example. The number of detections (count value) of the first detection signal CS1 is eight as an example. Thus, as apparent from the description of FIGS. 20 and 21, the output position T2 of the second pulse MP2 changes according to the generation period of the induced current Ip generated by the rotational vibration of the rotor 12. It is controlled to change according to the detection position of CS1.

  That is, since the driving force of the minute pulse MP is relatively large, if the first first pulse MP1 causes a large vibration of the rotor 12 of the step motor 10 and the generation period of the induced current Ip is relatively long, The output position T2 of the two-pulse MP2 is delayed according to the large amplitude of the rotational vibration of the rotor 12. In addition, since the driving force of the minute pulse MP is relatively small, the rotation vibration of the rotor 12 of the step motor 10 is swung by the first first pulse MP1 and the generation period of the induced current Ip is relatively short. The output position T2 of the second pulse MP2 is advanced according to the small amplitude of the rotational vibration of the rotor 12.

As a result, even if the amplitude or movement of the fan-shaped vibration of the rotor 12 changes due to a change in the battery voltage or the like, the output position T2 of the second pulse MP2 of the minute pulse MP is changed according to the change. The movement of vibration becomes smooth and stable fan-shaped vibration can be realized.

  Next, the operation in the rotation detection period when the rotor 12 rotates erroneously by one step due to rotational vibration because the driving force of the minute pulse MP is too large will be described with reference to FIG. In FIG. 22, when the detection pulse CP1 is output in the rotation detection period TC after the first pulse MP1 is output, a positive induced current Ip (indicated by a right-up hatching) is applied to the drive coil 11 due to the rotation of the rotor 12. When generated, the first detection signal CS1 is generated at the timing of the first detection pulse CP1 in accordance with the induced current Ip.

  Here, when the first detection signal CS1 exceeds the threshold value Vth (indicated by a dotted line) of the rotation detection circuit 29 three times, the determination is YES in step ST22 described above, and the second detection pulse CP2 is output from the output terminal O2. (Arrow K7). At this time, the output of the first detection pulse CP1 continues, the first detection signal CS1 continues to exceed Vth (indicated by a dotted line) according to the induced current Ip generated on the plus side, and the first detection signal CS1 is counted. . Then, after the positive induced current Ip decreases and the first detection signal CS1 does not exceed Vth, the output of the first detection pulse CP1 is stopped at the second first detection pulse CP1.

  On the other hand, if the rotor 12 exceeds the holding torque peak position B (see FIG. 5) because the driving force of the minute pulse MP is too large, a negative induced current Im (indicated by the right-down hatching) is generated in the driving coil 11. Then, the second detection signal CS2 is generated at the timing of the second detection pulse CP2 in accordance with the induced current Im.

  When the second detection signal CS2 exceeds two threshold values Vth (indicated by dotted lines) of the rotation detection circuit 29, the determination is YES in step ST24 described above, the process proceeds to step ST25, the rotation detection period TC is ended, and the reverse rotation pulse is reached. FP is output. Thus, when the driving force of the minute pulse MP is too large and the rotor 12 rotates one step erroneously, the rotor 12 can be returned by one step by outputting the reverse rotation pulse FP. In FIG. 22, the reverse pulse FP is not shown.

  Next, returning to the flowchart of FIG. 19, the operation flow of steps ST29 to ST31 will be described. Here, in steps ST29 to ST31, the rank of the minute pulse MP is changed according to the length of the generation period of the positive induced current Ip generated in the drive coil 11 (that is, the detection position of the first detection signal CS1). The driving force is selected.

  In FIG. 19, after outputting the second pulse MP2 in step ST28, the control circuit 22 determines whether or not the count value of the first detection signal CS1 is 12 or less as an example (step ST29). Here, if the determination is Y (the count value is 12 or less), the process proceeds to the next step ST30, and if the determination is N (the count value is 13 or more), the process proceeds to step ST26 and the rank of the minute pulse MP is set to 1. Rank down.

  This is because the count value of the first detection signal CS1 is large (that is, since the generation period of the induced current Ip is long and the amplitude of the rotational vibration of the rotor 12 is large, there is a possibility of erroneous rotation by one step). This is because the driving force is reduced from the output of the pulse MP.

  Next, if it is determination Y in step ST29, the control circuit 22 will determine whether the count value of the 1st detection signal CS1 is 9 or more as an example (step ST30). Here, if the determination is Y (the count value is 9 or more), the count value of the first detection signal CS1 is in the range of 9 to 12 and the generation period of the induced current Ip is just right. The vibration amplitude is determined to be appropriate, and one cycle of the sector vibration is ended (END) without changing the rank of the minute pulse MP.

  If it is determined as N in step ST30 (the count value is 8 or less), the generation period of the induced current Ip is short, and therefore the amplitude of the rotational vibration of the rotor 12 is small, so that the visibility of the fan-shaped vibration of the pointer is lowered. Since there is a possibility, the rank is increased by one rank from the output of the next minute pulse MP to increase the driving force (step ST31). The rank down and rank up operations for selecting the driving force of the minute pulse MP can use the rank table (FIG. 8B) shown in the third embodiment.

  Here, since the count value of the first detection signal CS1 is 19 in the example of FIG. 20, step ST26 (1 rank down) is executed, and in the example of FIG. 21, the count value of the first detection signal CS1 is Since there are 8 shots, step ST31 (up one rank) is executed. In this way, the detection position of the first detection signal CS1 is digitized as a count value, and the driving force of the minute pulse MP is selected.

  Note that the up / down of the rank of the minute pulse MP may be changed in accordance with the count number of the first detection signal CS1. For example, if the count number is 13 shots or more and 16 shots or less, 1 rank down is executed, and if the count number is 17 shots or more, 2 rank down is executed. Thereby, a finer rank adjustment is possible.

  As described above, according to the fifth embodiment, the output position T2 of the second pulse MP2 can be changed by grasping the movement of the rotational vibration of the rotor 12 from the detection position of the first detection signal CS1. As a result, even if the driving force of the minute pulse MP fluctuates due to fluctuations in the battery voltage and the movement of the fan-shaped vibration changes, the minute pulse MP can be supplied in accordance with the change, so the movement of the fan-shaped vibration of the pointer is smooth. Therefore, it is possible to provide an electronic timepiece having a display means by fan-shaped vibration which is stable, looks good and has excellent visibility.

  Along with the change of the output position of the second pulse MP2, the detection position of the first detection signal CS1 is digitized to grasp the state of the rotational vibration of the rotor 12 in detail, and the rank of the driving force of the minute pulse MP is quickly increased / decreased. Thus, the driving force of the minute pulse MP can be selected and adjusted. As a result, the fan-shaped vibration with stable vibration amplitude can be continued, and the frequency at which the step motor 10 rotates erroneously by one step due to the rotation vibration due to the fluctuation of the battery voltage or the like can be greatly reduced.

[Sixth Embodiment]
[Description of Operation Flow of Electronic Timepiece of Sixth Embodiment: FIG. 23]
Next, an outline of an operation flow of the electronic timepiece according to the sixth embodiment will be described with reference to FIG. The sixth embodiment is an application example of the third embodiment described above, and the configuration of the electronic timepiece and the configuration of each output pulse of the sixth embodiment are the same as those of the third embodiment. For the configuration of the electronic timepiece, refer to the configuration diagram (FIG. 6) of the third embodiment, and for the configuration of each output pulse, refer to the waveform diagram (FIG. 9) of the third embodiment.

  In FIG. 23, the operations of steps ST40 to ST42 are the same as steps ST1 to ST3 of the operation flow (see FIG. 10) of the third embodiment described above, and thus the description thereof is omitted here.

  Next, when step ST42 is determination Y (with CS1), the detection pulse generation circuit 25 continues to output the first detection pulse CP1, and the rotation detection circuit 29 outputs the first detection signal CS1 that exceeds the threshold value Vth. Continue to count the number of. When the induced current Ip decreases and the first detection signal CS1 does not exceed the threshold value Vth, the count value of the first detection signal CS1 is stored, and the detection pulse generation circuit 25 detects the first detection pulse CP1. The output is stopped (ST43: CP1 continuous output).

  Next, the detection pulse generation circuit 25 generates the second detection pulse CP2, outputs the second detection pulse CP2 from the output terminal O2 of the driver circuit 28, and the rotation detection circuit 29 inputs the second detection signal CS2. It is determined whether or not the second detection signal CS2 exceeds the threshold value Vth (ST44: Is there a second detection signal?).

  Here, if the second detection signal CS2 exceeds the threshold value Vth within a predetermined period (for example, two shots) (determination Y), it is determined that the rotor 12 has rotated one step erroneously, and the rotation detection period TC And the reverse pulse FP is output (step ST45), and the rank of the minute pulse MP is lowered by 1 (step ST46). The operations in steps ST45 and ST46 are the same as those in steps ST5 and ST6 (see FIG. 10) of the third embodiment described above, and detailed description thereof is omitted.

  Further, if the second detection signal CS2 does not exceed the threshold value Vth within a predetermined period (for example, two shots) within a predetermined period (determination N) (determination N), the control circuit 22 determines that the rotor 12 is not rotating. Then, the output of the second detection pulse CP2 is stopped, and the rotation detection period TC ends (ST47: rotation detection end).

  Next, operations in steps ST48 to ST50 after step ST47 (end of rotation detection) will be described. Here, in steps ST48 to ST50, the rank of the minute pulse MP is changed according to the length of the generation period of the positive induced current Ip generated in the drive coil 11 (that is, the detection position of the first detection signal CS1). The driving force is selected.

  After the end of the rotation detection period TC in step ST47, the control circuit 22 determines whether or not the count value of the first detection signal CS1 is 19 or less as an example (step ST48). If it is determined Y (count value 19 or less), the process proceeds to the next step ST49, and if it is determination N (count value 20 or more), the process proceeds to step ST46 and the rank of the minute pulse MP is 1 rank. To go down. This is because the count value of the first detection signal CS1 is large (that is, the amplitude of the rotational vibration of the rotor 12 is large, so there is a possibility of erroneous rotation by one step). It is for lowering.

Next, if it is determination Y in step ST48, the control circuit 22 will determine whether the count value of the 1st detection signal CS1 is 17 or more as an example (step ST49). Here, if the determination is Y (the count value is 17 or more), the count value of the first detection signal CS1 is 17 to 19.
Therefore, the period of generation of the induced current Ip is just right. Therefore, it is judged that the amplitude of the rotational vibration of the rotor 12 is appropriate, and one cycle of the fan-shaped vibration is finished without changing the rank of the minute pulse MP. (END).

  If it is determined as N in step ST49 (the count value is 16 or less), the generation period of the induced current Ip is short, and therefore the amplitude of the rotational vibration of the rotor 12 is small. Since there is a possibility, the rank is increased by one rank from the output of the next minute pulse MP to increase the driving force (step ST50). The rank down and rank up operations for selecting the driving force of the minute pulse MP can use the rank table (FIG. 8B) shown in the third embodiment.

[Explanation of Fan-Shaped Vibration Operation of Sixth Embodiment: FIGS. 24 to 26]
Next, the operation of the sector vibration of the sixth embodiment will be described using the timing charts of FIGS. FIG. 24 is a timing chart when the driving force of the minute pulse MP is relatively large, and FIG. 25 is a timing chart when the driving force of the minute pulse MP is relatively small. FIG. 26 is a timing chart when the rotor 12 rotates erroneously by one step due to rotational vibration because the driving force of the minute pulse MP is too large.

  24 to 26, the first pulse MP1 is output from the output terminal O1, and the second pulse MP2 is output from the output terminal O2. Here, the configurations of the first pulse MP1 and the second pulse MP2 and the coil currents Ic1 and Ic2 flowing through the drive coil 11 are the waveform diagram (FIG. 9) and timing chart (FIGS. 11 and 12) of the third embodiment described above. It is the same.

  In addition, the rotational vibration of the rotor 12 of the step motor 10 at this time is first rotationally vibrated in the reverse direction by the first pulse MP1, similarly to the locus C of the operation diagram (FIG. 5) of the second embodiment. The second pulse MP2 rotates and vibrates in the forward rotation direction.

  Next, after the output of the second pulse MP2, the rotation detection period TC is started, and the first detection pulse CP1 is output to the output terminal O1.

  Here, in FIG. 24 showing the operation when the driving force of the minute pulse MP is relatively large, when the detection pulse CP1 is output in the rotation detection period TC, the drive coil 11 is driven by the rotational vibration of the rotor 12 in the forward rotation direction. When a positive induced current Ip (indicated by a right-upward hatching) is generated, the first detection signal CS1 is generated at the timing of the first detection pulse CP1 according to the induced current Ip. Note that, since the driving force of the minute pulse MP is relatively large, the rotational vibration of the rotor 12 of the step motor 10 greatly fluctuates, and therefore the generation of the induced current Ip continues for a relatively long period.

  Here, when the first detection signal CS1 exceeds the threshold value Vth (indicated by the dotted line) of the rotation detection circuit 29 three times, the determination result is YES in step ST42 described above, and the second detection pulse CP2 is output from the output terminal O2. (Arrow K8). At this time, the output of the first detection pulse CP1 continues, the first detection signal CS1 continues to exceed Vth (indicated by a dotted line) according to the induced current Ip generated on the plus side, and the first detection signal CS1 continues. Be counted.

  Next, in the vicinity of 25 mS on the time axis of FIG. 24, after the induced current Ip decreases and the first detection signal CS1 does not exceed Vth, the output of the first detection pulse CP1 is output at the second detection pulse CP1. The operation stops and the count value of the first detection signal CS1 is stored. Here, in the example shown in FIG. 24, as described above, the driving force of the minute pulse MP is relatively large, and the generation of the induced current Ip continues for a relatively long period. It is.

  On the other hand, the second detection pulse CP2 is continuously output and waits for the second detection signal CS2 to be output due to the generation of the negative induced current Im, but the rotor 12 does not rotate, so the induced current Im is not generated. First, when the output position T1 of the first pulse MP1 is set as the starting point, the output of the second detection pulse CP2 is stopped at 30 mS as an example. Note that the second detection pulse CP2 may be stopped in accordance with the stop of the first detection pulse CP1.

  Here, in the example of FIG. 24, since the count value of the first detection signal CS1 is 20, the determination is N in step ST48 of the operation flow (see FIG. 23), 1 rank down is executed in step ST46, and the minute For the pulse MP, a driving force that is one rank lower is selected. Thus, the driving force of the minute pulse MP is immediately adjusted according to the detection position (count value) of the first detection signal CS1.

  Next, in FIG. 25 showing the operation when the driving force of the minute pulse MP is relatively small, when the detection pulse CP1 is output in the rotation detection period TC, the drive coil 11 is driven by the rotational vibration of the rotor 12 in the normal rotation direction. When a positive induced current Ip (indicated by a right-upward hatching) is generated, the first detection signal CS1 is generated at the timing of the first detection pulse CP1 according to the induced current Ip. Note that since the driving force of the minute pulse MP is relatively small, the rotational vibration of the rotor 12 of the step motor 10 fluctuates slightly, and therefore the generation of the induced current Ip takes a relatively short time.

  Here, when the first detection signal CS1 exceeds the threshold value Vth (indicated by the dotted line) of the rotation detection circuit 29 three times, the determination result is YES in step ST42 described above, and the second detection pulse CP2 is output from the output terminal O2. (Arrow K9). At this time, the output of the first detection pulse CP1 continues, the first detection signal CS1 continues to exceed Vth (indicated by a dotted line) according to the induced current Ip generated on the plus side, and the first detection signal CS1 continues. Be counted.

  Next, in the vicinity of 18 mS on the time axis in FIG. 25, after the induced current Ip decreases and the first detection signal CS1 does not exceed Vth, the output of the first detection pulse CP1 is output at the second detection pulse CP1. The operation stops and the count value of the first detection signal CS1 is stored. Here, in the example shown in FIG. 25, as described above, the driving force of the minute pulse MP is relatively small, and the generation of the induced current Ip takes a relatively short time. It is.

  On the other hand, the second detection pulse CP2 is continuously output and waits for the second detection signal CS2 to be output due to the generation of the negative induced current Im, but the rotor 12 does not rotate, so the induced current Im is not generated. First, when the output position T1 of the first pulse MP1 is set as a starting point, the output of the second detection pulse CP2 is stopped at 30 mS as an example.

  Here, in the example of FIG. 25, since the count value of the first detection signal CS1 is 15, the determination is YES in step ST48 of the operation flow (see FIG. 23), and further, the determination is N in the next step ST49. In step ST50, one rank up is executed, and a driving force that is one rank higher is selected for the minute pulse MP.

  Next, when the detection pulse CP1 is output in the rotation detection period TC in FIG. 26, which shows the operation when the rotor 12 rotates erroneously by one step due to rotational vibration because the driving force of the minute pulse MP is too large, When a positive induced current Ip (indicated by a right-up hatching) is generated in the drive coil 11 due to rotation in the forward direction of 12, the first detection signal CS1 at the timing of the first detection pulse CP1 according to the induced current Ip. Occurs.

Here, when the first detection signal CS1 exceeds the threshold value Vth (indicated by a dotted line) of the rotation detection circuit 29 three times, the determination is YES in the above-described step ST42 and the second detection pulse C is output from the output terminal O2.
P2 is output (arrow K10). At this time, the output of the first detection pulse CP1 continues, the first detection signal CS1 continues to exceed Vth (indicated by a dotted line) according to the induced current Ip generated on the plus side, and the first detection signal CS1 continues. Be counted. Then, after the positive induced current Ip decreases and the first detection signal CS1 does not exceed Vth, the output of the first detection pulse CP1 is stopped at the second first detection pulse CP1.

  On the other hand, if the rotor 12 exceeds the holding torque peak position B (see FIG. 5) because the driving force of the minute pulse MP is too large, a negative induced current Im (indicated by the right-down hatching) is generated in the driving coil 11. Then, the second detection signal CS2 is generated at the timing of the second detection pulse CP2 in accordance with the induced current Im.

  When the second detection signal CS2 exceeds two threshold values Vth (indicated by dotted lines) of the rotation detection circuit 29, the determination is YES in step ST44 described above, the process proceeds to step ST45, the rotation detection period TC is ended, and the reverse rotation pulse is reached. FP is output and the rotor 12 can be returned by one step. In FIG. 26, the reverse rotation pulse FP is not shown.

As described above, according to the sixth embodiment, similarly to the third embodiment described above, after outputting a set of minute pulses MP, the rotation of the rotor 12 is detected, and the rotor 12 is erroneously set to one step. In the case of rotation, the rotor 12 can be returned by one step by the reverse rotation pulse FP, so that it is possible to provide an electronic timepiece having a display means by fan-shaped vibration of the pointer without malfunction.

  Further, the state of the rotational vibration of the rotor 12 is grasped in detail by the detection position (count value) of the first detection signal CS1, and the driving force of the minute pulse MP is quickly selected and adjusted according to the state of the rotational vibration. However, stable fan-shaped vibration can be continued, and the frequency at which the step motor 10 rotates erroneously by one step due to rotational vibration due to fluctuations in battery voltage or the like can be greatly reduced.

[Seventh Embodiment]
[Description of Operation of Radio Timepiece of Seventh Embodiment: FIG. 27]
Next, the operation of the seventh embodiment will be described with reference to FIG. In the seventh embodiment, the display means based on the fan-shaped vibration of the electronic timepiece shown in the first to sixth embodiments is applied to a display at the time of reception of an electronic timepiece with a radio wave correction function (hereinafter abbreviated as a radio timepiece). It is an example.

  In general, a radio timepiece receives a standard radio wave including time information automatically at a predetermined time or by a user's operation, and corrects the time. Usually, the standard radio wave is received for about 3 to 10 minutes. I need time. This is because the standard radio wave contains all the time information in a one-minute time code, but the radio timepiece receives this one-minute time code multiple times, collates the received data, and increases the accuracy of reception. Because.

  Further, when the radio timepiece is an analog display timepiece using a step motor, electromagnetic noise may be generated from the step motor while the step motor is moving, which may interfere with reception of the standard radio wave. For this reason, it is necessary to stop the movement of the step motor while receiving the standard radio wave. However, if the movement of the step motor is stopped for 3 to 10 minutes during reception, the user cannot distinguish whether the watch is receiving the standard radio wave or is out of order. It will give anxiety to those who are not easy to use. In order to solve this problem, the display means based on the fan-shaped vibration of the pointer of the present invention is effective and will be described with reference to FIG.

In FIG. 27, as is well known, the time code of the standard radio wave includes all time information in 60 seconds from 00 seconds to the next 00 seconds. The outline of this time code is as follows: The first 0 seconds is minute information, the 10 seconds is hour information, the 20 seconds and the first half of the 30 seconds are month and day information (total day), and 30 seconds. The second half is parity, the 40 second range is year information, the first 50 second range is day and leap second information, and the 5 seconds from the second half of the 50 second range to the next 00 seconds are meaningful. There is no code “0”.

  Here, the radio timepiece receives the entire time code for one minute in the reception operation of the standard radio wave, and repeats the reception several times. As described above, the necessary time information in the time code is 00 The code is “0” that does not include time information for 5 seconds from 55 seconds to the next 00 seconds. Therefore, even if noise occurs in these 5 seconds, the standard time is received. Will not be affected.

  Therefore, in the radio timepiece of the seventh embodiment, when the reception of the standard radio wave is started, the driving time is not supplied to the step motor 10 from 00 seconds to 55 seconds of the time code, and the pointer is stopped (for example, , 0 second position). Further, for 5 seconds from receiving 55 seconds of the time code to the next 00 seconds, a minute pulse MP is supplied to the step motor 10 by the configuration of the first embodiment (see FIG. 2), for example, and the pointer is provided at a cycle of 32 mS. A fan-shaped vibration is performed to notify the user that the standard radio wave is currently being received.

  Thus, even if the radio timepiece automatically shifts to the reception mode, the radio timepiece user recognizes that the standard radio wave is currently being received by the fan-shaped vibration of the pointer that is performed for 5 seconds per minute. In addition, the user's anxiety is resolved, and a radio clock that is easy to understand and easy to use can be provided. Further, since the sector vibration operates only in a reception period that does not include time information, a high-performance radio timepiece that stably receives time information of a standard radio wave can be provided.

[Description of Operation of Radio Wave Clock of Modified Example of Seventh Embodiment: FIG. 28]
Next, the operation of the modified example of the seventh embodiment will be described with reference to FIG. In FIG. 28, the time code of the standard radio wave is output from markers called position markers P0 to P5 at intervals of 10 seconds every minute for 6 seconds. The position markers P0 to P5 do not include time information, and even if noise arrives during this period, reception of the standard time is not affected.

Therefore, in the modification of the seventh embodiment, the position markers P0 to P5 every 10 seconds.
In synchronism with this, a minute pulse MP is supplied to the step motor 10 every 10 seconds to perform fan-shaped vibration with a pointer, and during other time information reception periods, the step motor 10 is stopped. . The period of the position markers P0 to P5 is 1 second, which is short. However, the fan-shaped vibration of the present invention can vibrate the pointer at a high speed with a cycle of 32 mS, for example. Can fully recognize the vibration of the pointer.

  As a result, even if the radio timepiece automatically shifts to the reception mode, the radio timepiece user performs fan-shaped vibration with the pointer every 10 seconds, so that the standard radio wave is currently being received. It can be clearly recognized, the user's anxiety is resolved, the watch status is easy to understand and easy to use, and the fan-shaped vibration operates only during the reception period that does not include time information, so it can stably receive time information of standard radio waves. A high-performance radio clock that can be provided.

The fan-shaped vibration period may be implemented by combining the period from 55 seconds to 00 seconds as in the seventh embodiment and the period of the position markers P0 to P5 as in the modification. As a result, the user can be more clearly informed that the standard radio wave is being received.

Further, the display means by the fan-shaped vibration of the electronic timepiece of the present invention is not limited to the radio timepiece of the seventh embodiment, and as described above, in order to indicate that time is being measured in the electronic timepiece with a stopwatch function. Utilizing the low power consumption, such as making the chronograph hand vibrate, or stopping the second hand at the 0 second position to show that power is being saved due to a decrease in battery voltage. Can be widely applied.

  Further, the sector vibration means of the present invention can arbitrarily adjust the amplitude of the sector vibration by the pointer by selecting the driving force of the minute pulse MP. Thereby, the amplitude of the sector vibration can be reduced, and it can be used as an instruction means for instructing specific information with the pointer while causing the sector vibration. For example, when the battery voltage drops while instructing the current mode of the watch with the mode display hand, the mode display hand is vibrated for a predetermined period to convey the battery voltage drop information along with the mode display. it can.

  Note that the configuration diagrams, flowcharts, timing charts, and the like shown in the embodiments of the present invention are not limited thereto, and can be arbitrarily changed as long as they satisfy the gist of the present invention.

DESCRIPTION OF SYMBOLS 1, 20, 40 Electronic timepiece 2, 21 Oscillation circuit 3, 22 Control circuit 4, 23 Drive pulse generation circuit 5, 26, 41 Minute pulse generation circuit 6, 28 Driver circuit 10 Step motor 11 Drive coil 12 Rotor 24 Reverse rotation pulse generation Circuit 25 detection pulse generation circuit 27 selector circuit 29 rotation detection circuit 30 rank selection circuit 42 first pulse generation circuit 43 second pulse generation circuit H pointer CP detection pulse CS detection signal FP reverse pulse MP minute pulse MP1 first pulse MP2 second pulse

Claims (9)

A step motor having a rotor for driving the hands, and a driving coil for driving the rotor, and
The minute pulse of the driving force before SL rotor is non-rotating, and the minute pulse generating circuit for supplying to said driving coil,
A detection pulse generating circuit for supplying a detection pulse for detecting rotation of the rotor to the drive coil;
A rotation detection circuit that detects a detection signal generated by the detection pulse and determines rotation / non-rotation of the rotor;
A reverse pulse generating circuit for supplying a reverse pulse for rotating the rotor to the drive coil;
Have
Before SL minute pulses, it possesses before Symbol a first pulse that will be output to one terminal of the driving coil, and the second pulse that will be output to the other terminal of the pre-Symbol driving coil, and
After outputting the first pulse,
When the rotation detection circuit determines that the rotor is not rotating, the second pulse is output,
An electronic timepiece characterized in that, when the rotation detection circuit determines that the rotor is rotating, the reverse rotation pulse is output instead of the second pulse . The electronic timepiece according to claim 1, wherein the minute pulse generation circuit continuously outputs the minute pulse at intervals shorter than one second. The electronic timepiece according to claim 1 or 2, wherein the driving force of the second pulse is equal to or less than the driving force of the first pulse. Before SL minute pulse generating circuit, the electronic timepiece according to any one of claims 1 to 3, characterized in that it is capable of generating a configuration in which a plurality of types of the minute pulses having different driving forces. The detection pulse is
A first detection pulse output to a terminal on a different side from the first pulse;
A second detection pulse output to a terminal on the same side as the first pulse after completion of the output of the first detection pulse;
The electronic timepiece according to claim 4 , wherein a driving force of the minute pulse is selected according to a detection position of a first detection signal generated by the first detection pulse. According to the detection position of the first detection signal generated by the first detection pulse,
The electronic timepiece according to claim 5 , wherein an output position of the second pulse is changed. When the rotation detection circuit determines that the rotor has rotated after the output of the minute pulse, the minute pulse generation circuit sets the driving force of the minute pulse to a lower driving force than the currently set driving force. Do
An electronic timepiece according to any one of claims 4 to 6. The minute pulse generation circuit determines that the rotor has not rotated a predetermined number of times by the rotation detection circuit.
If determined, the driving force of the minute pulse is set to a driving force higher than the currently set driving force.
The electronic timepiece according to any one of claims 4 to 7, wherein Have a battery,
The minute pulse generation circuit sets the driving force of the minute pulse according to a change in the voltage of the battery.
The electronic timepiece according to claim 4, wherein the electronic timepiece is characterized in that

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