JP6774299B2 - How to control the pointer drive motor unit, movement, watch, and pointer drive motor - Google Patents

Description

The present invention relates to a pointer drive motor unit, a movement, a timepiece, and a method for controlling a pointer drive motor.

Smart watches are beginning to be released by various companies. Some smartwatches display the clock function as a part of other functions, but considering that it is used as a wristwatch, it is desirable that the battery of the clock function can be used in the same way as before. Therefore, it has been proposed to provide an analog watch module to a smart watch as a time display unit. In this case, the main control unit of the additional unit controls the pointer of the digital clock of the time display unit according to the function.

The pointer of an analog clock is driven by a stepping motor, but it is not easy to control the stepping motor to rotate and reverse the pointer. Therefore, the main control unit on the additional unit side simply sends an instruction, and the time display unit side controls the pointer.

Further, Patent Document 1 describes an electronic clock composed of a time display unit and an additional unit. For example, the time display unit is equipped with a crystal oscillator, a MOSIC (Metal-Oxide-Semiconductor Integrated Circuit) chip, a train wheel, a motor, a battery, etc., and the additional unit is equipped with a drive IC for additional functions. Has been done.

JP-A-2002-323577

When controlling the pointer on the time display unit side from the main control unit on the additional unit side, if a crystal oscillator is provided on the time display unit side, a drive pulse is given to the stepping motor in synchronization with the clock from this crystal oscillator. Then, the pointer can be moved regularly. However, if a crystal oscillator is provided on the time display unit side, the circuit scale increases and the power consumption increases. Therefore, it is conceivable that the main control unit on the additional unit side generates a hand movement pulse, the main control unit sends the hand movement pulse to the time display unit, and the stepping motor is driven based on the hand movement pulse.

However, when processing each functional unit (display unit (liquid crystal), input unit, communication unit), the processing load is particularly large during the processing of the communication unit. Therefore, the hand movement pulse transmitted from the main control unit may be delayed. For this reason, in particular, when high-load processing other than motor drive is performed, the timing of the hand movement pulse may fluctuate depending on the processing time and timing, and the hand movement pulse may fluctuate. is there. If the hand movement pulse fluctuates, regular hand movement cannot be performed.

The present invention has been made in view of the above points, and is used for a pointer drive motor unit, a movement, a clock, and a pointer drive so that regular hand movement can be performed even if the hand movement pulse instructing the rotation of the pointer fluctuates. It is an object of the present invention to provide a control method of a motor.

In order to achieve the above object, the pointer drive motor unit according to one aspect of the present invention includes a support, a motor that drives a pointer that can rotate with respect to the support, a reference pulse of a reference period, and the guideline. instructs the hand movement, the reference pulse movement pulse occurring as a starting point of the reference period, is input, when said predetermined state of movement pulse is held, the driving pulses for driving the motor, the reference It is equipped with a motor drive unit that outputs periodically . The motor drive unit includes a holding unit that holds the hand movement pulse in the predetermined state, and the holding unit sets a period for holding the predetermined state as a period corresponding to the reference cycle.

Further, in the pointer drive motor unit according to one aspect of the present invention, the motor drive unit sets the starting point at which the hand movement pulse is input as the time point at which the reference pulse falls, and at the time when the reference pulse rises. At least one of the setting of outputting the drive pulse and the setting of outputting the drive pulse at the time of the fall of the reference pulse with the starting point at which the hand movement pulse is input as the rising point of the reference pulse. May be set.

Further, in the pointer driving motor unit according to one aspect of the present invention, the predetermined state of the hand movement pulse may be set as a state of continuing during the period instructing the hand movement of the pointer.

Further, in the pointer driving motor unit according to one embodiment of the present invention, the front Symbol holder may be constituted by a latch circuit or the delay circuit.

Further, in the pointer driving motor unit according to one embodiment of the present invention, the front Symbol holding portion is constituted by the delay circuit, so that the pulse width of the movement pulse is set as a pulse width equal to the width of said reference pulse It may be.

In order to achieve the above object, the movement according to one aspect of the present invention is a movement having the above-mentioned pointer drive motor unit as a component, and is mounted on a substrate on which the support is mounted and on the substrate. It includes a control unit that outputs the reference pulse and the hand movement pulse and can drive a load different from that of the motor.

Further, the timepiece according to one aspect of the present invention may include the above-mentioned movement and a dial on which the pointer is rotated.

In order to achieve the above object, the method for controlling the pointer drive motor according to one aspect of the present invention is a method for controlling the support and the pointer drive motor for driving the pointer rotatable with respect to the support. , The reference pulse of the reference cycle is input, the hand movement of the pointer is instructed , the hand movement pulse generated from the reference pulse of the reference cycle is input, and the period for holding the hand movement pulse in a predetermined state is the reference. It is set as a period corresponding to the cycle, and when the predetermined state of the hand movement pulse is held, the drive pulse is output to the pointer drive motor in the reference cycle.

According to the present invention, regular hand movement can be realized even if the hand movement pulse instructing the rotation of the pointer fluctuates.

It is a block diagram which shows the structure of the multifunction electronic device including the pointer drive motor unit in 1st Embodiment. It is a timing chart which shows an example of the relationship between a reference pulse and a hand movement pulse. It is a timing chart which shows another example of the relationship between a reference pulse and a hand movement pulse. It is a timing chart used for explaining the delay of a hand movement pulse. It is a flowchart which shows the processing of the hand movement pulse in 1st Embodiment. It is a timing chart used for explaining the processing of the hand movement pulse in 1st Embodiment. It is a block diagram which shows the hardware structure for processing the hand movement pulse in 1st Embodiment. It is a timing chart used for explaining the modification of the processing of the hand movement pulse in 1st Embodiment. It is a timing chart used for explaining the modification of the processing of the hand movement pulse in 1st Embodiment. It is a timing chart used for explaining the modification of the processing of the hand movement pulse in 1st Embodiment. It is a timing chart used for explaining the processing of the hand movement pulse in 2nd Embodiment. It is a flowchart which shows the processing of the hand movement pulse in 2nd Embodiment. It is a block diagram which shows the hardware structure for processing the hand movement pulse in 2nd Embodiment. It is a timing chart used for explaining the modification of the processing of the hand movement pulse in 2nd Embodiment. It is a timing chart used for explaining the modification of the processing of the hand movement pulse in 2nd Embodiment. It is a timing chart used for explaining the modification of the processing of the hand movement pulse in 2nd Embodiment.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
<First Embodiment>
FIG. 1 is a configuration diagram showing a configuration of a multifunctional electronic device 1 including a pointer drive motor unit according to the first embodiment. The multifunctional electronic device 1 in the first embodiment is, for example, a smart watch having a wireless communication function. For example, the multifunctional electronic device 1 operates in response to an instruction from an external device. The multifunctional electronic device 1 may be an electronic clock capable of executing a program received from an external device such as a terminal 20. Further, the multifunctional electronic device 1 may be an electronic clock that accesses a network including a relay device such as a base station or a router and downloads the above program. An electronic clock including the multifunctional electronic device 1 includes a dial (not shown) in which the multifunctional electronic device 1 is used as a movement and the first to third pointers are rotated on the movement.

The multifunctional electronic device 1 includes, for example, an oscillation circuit 2, an operation unit 3, a main control unit 4, a pointer drive motor unit 5, and a communication unit 10. Further, the multifunctional electronic device 1 communicates with the terminal 20 to send and receive information. The terminal 20 is, for example, a smartphone (multifunctional mobile phone), a tablet terminal, a personal computer, a portable game device, a home network device, an in-vehicle system device, or the like.

An oscillation circuit 2, an operation unit 3, and a communication unit 10 are connected to the main control unit 4. The main control unit 4 and the pointer drive motor unit 5 are connected to each other via n (n is an arbitrary number) signal lines WR. The number of signal line WRs may be changed according to the type of signal output from the main control unit 4 to the pointer drive motor unit 5.

The oscillation circuit 2 includes a crystal oscillator having a desired frequency. The main control unit 4 generates a reference pulse based on the signal generated by the crystal oscillator.

The operation unit 3 is, for example, a crown, a button, or the like. When the operation unit 3 is operated by the user (for example, a rotation operation or a pressing operation), the operation unit 3 outputs an operation signal corresponding to this operation to the main control unit 4. The operation signals include, for example, an instruction to adjust the position of each pointer (time adjustment instruction), an instruction to start chronograph measurement, an instruction to end chronograph measurement, an instruction to reset the chronograph display, an alarm set time, and the like. You can do it.

The communication unit 10 uses, for example, a communication method of a Wi-Fi (Wireless Fitness) standard or a Bluetooth (registered trademark) LE (Low Energy) (hereinafter referred to as BLE) standard to send instructions and information to and from the terminal 20. Send and receive.

The communication unit 10 outputs the information received from the terminal 20 to the main control unit 4. Further, the communication unit 10 transmits the information output by the main control unit 4 to an external device such as the terminal 20. The information output by the main control unit 4 includes, for example, a response to information received from the terminal 20, information indicating the number of pointer drive motor units included in the multifunctional electronic device 1, and information indicating the number of pointers included in the multifunctional electronic device 1. Etc. may be included.

The main control unit 4 controls the operation of the multifunctional electronic device 1 by executing a program stored in a storage unit (not shown) by a processor such as a CPU (Central Processing Unit). The CPU is described as a concept including an MPU (microprocessor unit) and an MCU (microcontroller unit), and may be any one that can achieve any of the functions, actions, and effects of the present invention.

The main control unit 4 outputs a reference pulse to the signal line CLK based on the signal generated by the oscillation circuit 2. Further, the main control unit 4 outputs a hand movement pulse to the signal line WRa when the pointer is moved. Further, the main control unit 4 acquires the instruction output by the communication unit 10 and controls the corresponding signal lines WRb to WRf according to the acquired instruction. The signal lines WRb to WRf are signal lines for controlling the pointer to move in the forward direction (clockwise), the pointer to move in the reverse direction (counterclockwise), and the like.

The pointer drive motor unit 5 includes a support 51, an input unit 52, a storage unit 55, a motor drive unit 56, and first to third motors 57A to 57C. The pointer drive motor unit 5 may include the first to third pointers 58A to 58C.

The support 51 includes a substrate, a base plate as a base, a receiving plate that holds down parts arranged on the base plate from the opposite side, other case portions, bearings to which the rotating shafts of the first to third motors 57A to 57C are joined, and the like. Including. A substrate is arranged on the main plate, and on the substrate, wiring, an input unit 52, a storage unit 55, a motor drive unit 56, first to third motors 57A to 57C, and a wheel which is a gear train for transmitting torque from the motor. Columns etc. are arranged. The unit is assembled by fastening these parts with a backing plate.

The input unit 52 is a communication interface of the motor drive unit 56. The input unit 52 includes a port terminal connected to the signal line CLK and the signal lines WRa to WRf.

The storage unit 55 may be realized by, for example, a non-volatile storage medium such as a ROM (Read Only Memory) or a flash memory.

The motor drive unit 56 is a logic circuit, and may be realized by hardware such as an LSI (Large Scale Integration), an ASIC (Application Specific Integrated Circuit), and an FPGA (Field-Programmable Gate Array). The motor drive unit 56 generates drive pulses for driving the first to third motors 57A to 57C in response to signals sent from the main control unit 4 to each port terminal of the input unit 52.

The first motor 57A to the third motor 57C are stepping motors, and rotate based on a drive pulse output from the motor drive unit 56. A first pointer 58A (for example, a second hand) is rotatably supported on the rotation shaft of the first motor 57A. A second pointer 58B (for example, a minute hand) is rotatably supported on the rotation shaft of the second motor 57B. A third pointer 58C (for example, an hour hand) is rotatably supported on the rotation shaft of the third motor 57C. The first to third pointers 58A to 58C are rotated on a dial on which the time is stamped to indicate the time.

Next, the hand movement control in the multifunctional electronic device 1 according to the present embodiment will be described.
In the present embodiment, the first to third pointers 58A to 58C (second hand, minute hand, hour hand) are moved by the hand movement pulse from the main control unit 4. The main control unit 4 and the motor drive unit 56 are connected by a signal line CLK and signal lines WRa to WRf. A reference pulse is sent to the signal line CLK. A hand movement pulse is sent to the signal line WRa. The rotation of the pointer is controlled by the cycle of the hand movement pulse.

FIG. 2 is a timing chart showing an example of the relationship between the reference pulse and the hand movement pulse. In FIG. 2, the horizontal axis is time. The waveform g1 shows a reference pulse sent by the signal line CLK, and the waveform g2 shows a hand movement pulse sent from the signal line WRa. The reference pulse is, for example, a pulse of 64 Hz. The hand movement pulse is an interrupt at the falling edge of the reference pulse, and it is determined whether or not to transmit the hand movement pulse. The hand movement pulse is a pulse of negative logic. In the waveform g2, the hand movement pulse is output every 64 clocks at the falling edge of the reference pulse. Assuming that the reference pulse is 64 Hz, if the hand movement pulse is output every 64 clocks at the falling edge of the reference pulse, the hand movement pulse is output every second. Therefore, in this case, the pointer can be moved by 1 second.

FIG. 3 is a timing chart showing another example of the relationship between the reference pulse and the hand movement pulse. In FIG. 3, the horizontal axis is time. The waveform g1 shows a reference pulse, and the waveform g3 shows a hand movement pulse. In this example, the hand movement pulse is output every time the reference pulse falls. In this case, assuming that the reference pulse is 64 Hz, the hand movement pulse is output every 1/64 second, and the pointer can be advanced at 64 times speed.

In this way, since the hand movement pulse is generated by the interruption of the fall of the reference pulse, the fall of the reference pulse and the fall of the hand movement pulse should match. However, the influence of the processing load for processing each functional unit (display unit (liquid crystal), input unit, communication unit), especially when the communication unit 10 is used, the current consumption of the communication unit 10 is large, so that the main control unit The hand movement pulse transmitted from 4 may be delayed, and the hand movement pulse may fluctuate.

FIG. 4 is a timing chart showing the delay of the hand movement pulse. In FIG. 4, the horizontal axis is time. In this example, the hand movement pulse is generated every time the falling edge of the reference pulse of 64 Hz. Therefore, the pointer will be sent 64 times faster. In the example of FIG. 4, the falling time of the hand movement pulse (waveform g11) is delayed from the falling time of the reference pulse (waveform g1), and this delay fluctuates. Therefore, as shown in the waveform g12, the period of the motor drive pulse varies, and the movement of the pointer fluctuates.

Therefore, in the present embodiment, the hand movement pulse is latched and held in the active state, and the motor drive pulse is output at the reference cycle of the reference pulse. As a result, even if the hand movement pulse fluctuates, the movement of the pointer can be maintained regularly.

FIG. 5 is a flowchart showing the processing of the hand movement pulse in the first embodiment. In this example, the main control unit 4 outputs a hand movement pulse by interrupting the falling edge of the reference pulse, and the hand movement pulse is a pulse having a narrow negative logic width.

In FIG. 5, the motor drive unit 56 waits for the falling edge of the hand movement pulse (step S1). When the hand movement pulse falls (step S1: YES), the motor drive unit 56 waits for the rising edge interrupt of the reference pulse by repeating the process of step S2 (step S2). Then, when the reference pulse rises (step S2: YES), the motor drive unit 56 generates and outputs the motor drive pulse (step S3), and returns to the process of step S1.

FIG. 6 is a timing chart used for explaining the processing of the hand movement pulse in the first embodiment. In FIG. 6, the horizontal axis is time. The waveform g1 shows a reference pulse, the waveform g21 shows a hand movement pulse, and the waveform g22 shows a motor drive pulse. As shown in the waveform g1, it is assumed that the reference pulse falls at time t1. Originally, the hand movement pulse should be output at this time t1, but it is assumed that the hand movement pulse is delayed due to the influence of the processing load and is output at time t2 as shown in the waveform g21.

The motor drive unit 56 waits for the fall of the hand movement pulse, and when the fall of the hand movement pulse is detected at time t2, it waits for the rise of the reference pulse. Then, as shown in the waveform g1, when the rising edge of the reference pulse is detected at time t3, the motor drive unit 56 outputs the motor drive pulse as shown in the waveform g22.

Similarly, the motor drive unit 56 outputs the motor drive pulse at the rising time t6 of the reference pulse when the reference pulse falls at the time t4 and the hand movement pulse falls later at the time t5. When the reference pulse falls at time t7 and the hand movement pulse falls later at time t8, the motor drive pulse is output at time t9 when the reference pulse rises. When the reference pulse falls at time t10 and the hand movement pulse falls later at time t11, the motor drive pulse is output at time t12 when the reference pulse rises.

As shown in the waveform g21, the hand movement pulse is output with a delay of time σa with respect to the fall of the reference pulse due to the influence of the processing load and the like, and the delay time σa of this hand movement pulse fluctuates. On the other hand, by performing the process shown in FIG. 5, as shown in the waveform g22, the fluctuation of the delay time σb of the supply timing of the motor drive pulse from the motor drive unit 56 can be almost eliminated.

FIG. 7 is a block diagram showing a hardware configuration for processing the hand movement pulse in the first embodiment. As shown in FIG. 7, the process shown in the flowchart of FIG. 5 can also be performed by hardware including a latch circuit 101, an AND gate 102, a latch period setting unit 103, and an inverter 104.

In FIG. 7, the latch period setting unit 103 sets the latch circuit 101 to the H level for each latch period. The latch period may be set from the rise of the reference pulse to the rise of the next reference pulse, or may be the output period of the L level of the reference pulse. When the latch period is from the rise of the reference pulse to the rise of the next reference pulse, the latch period setting unit 103 sets the latch circuit 101 to the H level immediately after the rise of the reference pulse. When the output period of the L level of the reference pulse is set as the latch period, the latch period setting unit 103 sets the latch circuit 101 to the H level immediately before the fall of the reference pulse.

The latch circuit 101 inputs a hand movement pulse and holds the L level at the falling edge of the hand movement pulse. The output of the latch circuit 101 is inverted by the inverter 104 and supplied to one input end of the AND gate 102. A reference pulse is supplied to the other input end of the AND gate 102.

At the start of the latch period, the latch circuit 101 is held at the H level by the latch period setting unit 103. When the hand movement pulse is input, the L level is held in the latch circuit 101 at the falling edge of the hand movement pulse. As a result, one input end of the AND gate 102 becomes H level.

Then, when the reference pulse rises, both input ends of the AND gate 102 become H level, and the output of the AND gate 102 becomes H level. A motor drive pulse is output at the timing when the output of the AND gate 102 reaches the H level. As a result, the motor drive pulse can be output at the timing shown in the waveform g22 of FIG.

In the example of FIG. 7, the latch circuit 101 holds the L level at the falling edge of the hand movement pulse, but the latch circuit 101 may hold the H level at the falling edge of the hand movement pulse. In that case, the inverter 104 becomes unnecessary.

8 to 10 are timing charts used for explaining a modification of the present invention. 8 to 10 are applied when the output timing of the reference pulse and the logic of the hand movement pulse are different. In FIGS. 8 to 10, the horizontal axis is time.

That is, in the present embodiment, as shown in the waveform g1 of FIG. 6, the main control unit 4 outputs the hand movement pulse by the falling interrupt of the reference pulse, and as shown in the waveform g21 of FIG. 6, the hand movement pulse. Is a pulse of negative logic. Further, the hand movement pulse is a pulse having a narrow width. In this case, as shown in the waveform g22 of FIG. 6, the motor drive unit 56 waits for the fall of the hand movement pulse, and when the fall of the hand movement pulse is detected, waits for the rise of the reference pulse and the rise of the reference pulse. When it is detected, the motor drive pulse is output to eliminate the fluctuation of the supply timing of the motor drive pulse.

On the other hand, in the example of FIG. 8, as shown in the waveform g1, the main control unit 4 outputs a hand movement pulse by interrupting the rising edge of the reference pulse (time t21, t24, t27, t30, t33), and the waveform g31. As shown in, the hand movement pulse is a positive logic pulse. In this case, as shown in the waveform g32, the motor drive unit 56 waits for the rise of the hand movement pulse (time t22, t25, t28, t31, t34), and when the rise of the hand movement pulse is detected, the rise of the reference pulse. Waiting for the fall, when the fall of the reference pulse (time t23, t26, t29, t32, t35) is detected, the motor drive pulse is output.

Further, in the example of FIG. 9, the main control unit 4 outputs a hand movement pulse at the rising edge of the reference pulse (time t40, t43, t46, t49, t52) as shown in the waveform g1, and is shown in the waveform g41. In addition, the hand movement pulse is a negative logic pulse. In this case, as shown in the waveform g42, the motor drive unit 56 waits for the fall of the hand movement pulse (time t41, t44, t47, t50, t53), and when the fall of the hand movement pulse is detected, the reference pulse When the fall of the reference pulse (time t42, t45, t48, t51, t54) is detected, the motor drive pulse is output.

Further, in the example of FIG. 10, as shown in the waveform g1, the main control unit 4 outputs a hand movement pulse at the falling (time t60, t63, t66, t69, t72) interrupt of the reference pulse and shows it in the waveform g51. As described above, the hand movement pulse is a positive logic pulse. In this case, as shown in the waveform g52, the motor drive unit 56 waits for the rise of the hand movement pulse (time t61, t64, t67, t70, t73), and when the rise of the hand movement pulse is detected, the rise of the reference pulse. When the rising edge of the reference pulse (time t62, t65, t68, t71, t74) is detected, the motor drive pulse may be output.

The configuration of this embodiment can also be applied to a case where hand movement pulses are output alternately with positive logic and negative logic. It can also be applied when a hand movement pulse is output at the rising and falling edges of the reference pulse.

<Second Embodiment>
Next, the second embodiment will be described. In the first embodiment, the hand movement pulse is latched and held in the active state, and the motor drive pulse is output at the reference cycle of the reference pulse. On the other hand, in the present embodiment, the hand movement pulse is delayed and held in the active state, and the motor drive pulse is output at the reference cycle of the reference pulse. Other configurations are the same as those in the first embodiment.

FIG. 11 is a timing chart used for explaining the processing of the hand movement pulse in the second embodiment. In FIG. 11, the horizontal axis is time.
In this example, the main control unit 4 outputs a hand movement pulse at the falling interrupt of the reference pulse, and the hand movement pulse is a pulse of negative logic. Further, in the present embodiment, the reference pulse and the hand movement pulse have the same pulse width.

The waveform g1 in FIG. 11 shows a reference pulse, the waveform g61 shows a hand movement pulse, and the waveform g62 shows a motor drive pulse. As shown in the waveform g1, it is assumed that the reference pulse falls at time t101. Originally, the hand movement pulse should be output at this time t101, but the hand movement pulse may be delayed due to the influence of the processing load or the like. Further, in the present embodiment, a predetermined delay is given to the hand movement pulse. The predetermined delay amount is a range in which the delay is allowed in the fastest reference pulse (64 Hz), and is a half cycle of 0 to the reference pulse. Therefore, when the reference pulse falls at time t101, as shown in the waveform g61, the hand movement pulse falls to the L level at time t102, following this.

The motor drive unit 56 has detected that the delayed hand movement pulse is at the L level and the reference pulse is at the H level. When the reference pulse reaches the H level at the time t103 after the hand movement pulse delayed at the time t102 reaches the L level, the motor drive unit 56 outputs the motor drive pulse as shown in the waveform g62.

Similarly, in the motor drive unit 56, when the reference pulse falls at time t104 and the hand movement pulse falls later at time t105, the hand movement pulse becomes L level and the reference pulse becomes H level at time t106. , Outputs the motor drive pulse. When the reference pulse falls at time t107 and the hand movement pulse falls later at time t108, the motor drive pulse is output at time t109 when the hand movement pulse becomes L level and the reference pulse becomes H level. When the reference pulse falls at time t110 and the hand movement pulse falls later at time t111, the motor drive pulse is output at time t112 when the hand movement pulse becomes L level and the reference pulse becomes H level.

As shown in the waveform g61, the hand movement pulse is output with a delay of time σc with respect to the fall of the reference pulse due to the influence of the processing load and the like, and the delay time σc of this hand movement pulse fluctuates. On the other hand, as shown in the waveform g62, the fluctuation of the delay time σd of the supply timing of the motor drive pulse from the motor drive unit 56 can be almost eliminated.

FIG. 12 is a flowchart showing the processing of the hand movement pulse in the second embodiment. In this example, the main control unit 4 outputs a hand movement pulse by interrupting the falling edge of the reference pulse, and the hand movement pulse is a pulse having a wide range of negative logic.

In FIG. 12, the motor drive unit 56 waits for the falling edge of the hand movement pulse (step S11). When the hand movement pulse falls (step S11: YES), the motor drive unit 56 waits by repeating the process of step S12 until the hand movement pulse is at the L level and the reference pulse is at the H level (step S12). .. Then, when the hand movement pulse is at the L level and the reference pulse is at the H level (step S12: YES), the motor drive unit 56 generates and outputs the motor drive pulse (step S13), and the process of step S11. Return to.

FIG. 13 is a block diagram showing a hardware configuration for processing the hand movement pulse in the second embodiment. As shown in FIG. 13, the processing of the hand movement pulse according to the second embodiment can also be performed by hardware including a delay circuit 111, an AND gate 112, and an inverter 113.

In FIG. 13, the reference pulse is supplied to one input end of the AND gate 112. The hand movement pulse is delayed by a predetermined amount in the delay circuit 111, inverted by the inverter 113, and supplied to the other input end of the AND gate 112. The delay amount by the delay circuit 111 is in the range where the delay is allowed in the fastest reference pulse (64 Hz), and is a half cycle of 0 to the reference pulse.

When the reference pulse drops to the L level, one input end of the AND gate 112 becomes the L level. While one input end of the AND gate 112 is at the L level, the output of the AND gate 112 is at the L level.

The hand movement pulse becomes L level after being delayed by the delay circuit 111. While the output of the delay circuit 111 is at L level, the output of the inverter 113 is at H level, and the other input end of the AND gate 112 is at H level. Even if the other input end of the AND gate 112 is at the H level, the output of the AND gate 112 is at the L level while the reference pulse is at the L level.

When the reference pulse rises, both input ends of the AND gate 112 become H level, and at the timing when the reference pulse rises, the output of the AND gate 112 becomes H level. The motor drive pulse is output at the timing when the output of the AND gate 112 reaches the H level. As a result, the motor drive pulse can be output at the timing shown in the waveform g62 of FIG.

14 to 16 are timing charts used for explaining a modification of the present invention. In FIGS. 14 to 16, the horizontal axis is time. 14 to 16 are applied when the output timing of the reference pulse and the logic of the hand movement pulse are different. That is, in the second embodiment, as shown in the waveform g1 of FIG. 11, the main control unit 4 outputs the hand movement pulse by the falling interrupt of the reference pulse, and the hand movement pulse is a pulse of negative logic. In this case, the motor drive unit 56 delays the hand movement pulse as shown in the waveform g61 of FIG. 11, and the hand movement pulse is at the L level and the reference pulse is at the H level as shown in the waveform g62 of FIG. At that time, the motor drive pulse is output.

On the other hand, in the example of FIG. 14, as shown in the waveform g1, the main control unit 4 outputs a hand movement pulse at the rising edge of the reference pulse (time t201, t204, t207, t210) and makes the hand movement pulse positive. It is a logical pulse. In this case, the motor drive unit 56 delays the hand movement pulse as shown in the waveform g71, and when the hand movement pulse is at the H level and the reference pulse is at the L level as shown in the waveform g72 (time t203). , T206, t209, t212), the motor drive pulse is output.

Further, in the example of FIG. 15, as shown in the waveform g1, the main control unit 4 outputs a hand movement pulse by interrupting the rising edge of the reference pulse (time t301, t304, t307, t310), and the hand movement pulse is a pulse of negative logic. It is supposed to be. In this case, the motor drive unit 56 delays the hand movement pulse as shown in the waveform g81, and when the hand movement pulse is at the L level and the reference pulse is at the L level as shown in the waveform g82 (time t303). , T306, t309, t312), the motor drive pulse is output.

Further, in the example of FIG. 16, as shown in the waveform g1, the main control unit 4 outputs the hand movement pulse at the falling (time t401, t404, t407, t410) interrupt of the reference pulse, and the hand movement pulse is positively logical. It is a pulse. In this case, the motor drive unit 56 delays the hand movement pulse as shown in the waveform g91, and when the hand movement pulse becomes the H level and the reference pulse becomes the H level as shown in the waveform g92 (time t403). , T406, t409, t412), the motor drive pulse may be output.

Although the embodiments of the present invention have been described above, the present invention is not limited to the above embodiments, and various modifications can be made without departing from the spirit of the present invention.
For example, although the hardware configuration for processing the hand movement pulse is shown in FIGS. 7 and 13, the CPU (central processing unit) may perform the processing of the hand movement pulse by software. In this case, for example, the motor drive unit 56 may have a CPU function.

Further, in the present embodiment, an example of a digital clock is shown as an example of the multifunctional electronic device 1, but it can also be applied to a device that receives a reference clock supplied from the outside and controls using the supplied reference clock. is there.

1 ... Multi-function electronic device, 2 ... Oscillator circuit, 3 ... Operation unit, 4 ... Main control unit, 10 ... Communication unit, 20 ... Terminal, 51 ... Support, 52 ... Input unit, 53 ... Output unit, 56 ... Motor Drive unit, 57A to 57C ... 1st to 3rd motors, 58A to 58C ... 1st to 3rd pointers, 101 ... Latch circuit, 102 ... AND gate, 111 ... Delay circuit, 112 ... AND gate

Claims (8)

With the support
A motor that drives a pointer that can rotate with respect to the support,
If the instructed reference pulse of the reference period, and the hand movement of the pointer, the reference pulse movement pulse occurring as a starting point of the reference period, is input, the predetermined condition of the movement pulse is held, the motor And the motor drive unit that outputs the drive pulse that drives the
Equipped with a,
The motor drive unit includes a holding unit that holds the hand movement pulse in the predetermined state.
The holding unit is a pointer drive motor unit that sets a period for holding the predetermined state as a period corresponding to the reference cycle . The motor drive unit
The starting point at which the hand movement pulse is input is set as the time point of the fall of the reference pulse, and the drive pulse is output at the time of the rise of the reference pulse.
The starting point at which the hand movement pulse is input is set as the rising point of the reference pulse, and the driving pulse is output at the falling point of the reference pulse.
The pointer drive motor unit according to claim 1, wherein at least one of them is set. The pointer driving motor unit according to claim 1 or 2 , wherein the predetermined state of the hand movement pulse is set as a state of continuing during a period in which the hand movement of the pointer is instructed. Before SL holder, constituted by a latch circuit or the delay circuit, pointer driving motor unit according to any one of claims 1 to 3. Before SL holding unit includes a delay circuit,
The pointer driving motor unit according to any one of claims 1 to 3 , wherein the pulse width of the hand movement pulse is set to a width equivalent to the pulse width of the reference pulse. A movement whose component is the pointer drive motor unit according to claim 1.
The substrate on which the support is mounted and
A movement that is mounted on the substrate, outputs the reference pulse and the hand movement pulse, and has a control unit capable of driving a load different from that of the motor. A timepiece comprising the movement according to claim 6 and a dial on which the pointer is rotated. With the support
A method for controlling a pointer drive motor that drives a pointer that can rotate with respect to the support.
A reference pulse of the reference cycle is input, a hand movement of the pointer is instructed, and a hand movement pulse generated from the reference pulse of the reference cycle is input.
The period for holding the hand movement pulse in a predetermined state is set as the period corresponding to the reference cycle, and the period is set.
A method for controlling a pointer drive motor that outputs a drive pulse to a pointer drive motor at the reference cycle when the predetermined state of the hand movement pulse is held.

Images