JP2523829Y2 - Clock device - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a clock device for individually driving an hour hand and a minute hand by using a pulse motor capable of rotating forward and backward, and in particular, to an improvement of a circuit for searching for an origin (on the hour) at startup. It is about.

[0002]

2. Description of the Related Art In recent years, with the increasing functionality of analog watches,
Clock design, such as driving the hour hand and minute hand by separate pulse motors that can rotate forward and reverse respectively, limiting the drive range of the hour hand and minute hand to 120 degrees or 180 degrees, and making the shape of the dial a fan shape There have been proposed various analog clocks that give a change to the clock, and they have been put to practical use.

In this type of timepiece, a contact switch having a spring contact is disposed on the back side of the dial,
At the time of startup, a circuit for detecting the origin position by cooperation of this contact switch and the origin index portion provided on the hour (minute) hand wheel and performing an origin search for determining the rotation reference position of the hour (minute) hand shaft is provided. Is provided.

FIG. 7 is a diagram for explaining a conventional origin search operation. In the drawing, reference numeral 1 denotes an hour hand (or minute hand), and reference numeral 2 denotes a contact switch. The origin search is performed when the power is turned on or when the reset switch is pressed. Normally, first, as shown in (1) of FIG. 7A, the hour wheel 1 is rotated clockwise (forward rotation) by a pulse motor (not shown). At this time, the L-shaped fixed contact 21 of the contact switch 2 and the flat movable element (spring contact)
Reference numerals 22 are parallel to each other and are in a non-contact state. With the rotation of the hour wheel 1 in the forward direction, as shown in (2) of FIG. 1A, a contact point is formed on the side surface of the column-shaped origin index portion 11 provided at a predetermined position of the hour wheel 1. The mover 22 having elasticity of the switch 2 comes into contact with the switch.

The mover 22 slides while maintaining the state of contact with the origin index portion 11, and flexes in a direction away from the fixed contact 21 with the rotation of the hour wheel 1; The contact state with the part 11 is released. As a result, the mover 22 bends in the direction of the fixed contact 21 due to the urging force when the contact state is released, and comes into contact with the fixed contact 21. When the fixed contact 21 and the mover 22 are in a contact state,
The contact switch 2 is turned on, and this ON state is detected by a detection system (not shown) through the output terminal 23, and the rotation of the pulse motor is stopped. As shown in (3) of FIG. Stops at the origin position O, and the origin search ends.
The origin search for the minute hand is also performed in the same manner as described above.

[0006]

By the way, in the conventional timepiece device described above, the origin search is not performed clockwise due to a load condition or the like, but as shown in (1) and (2) of FIG.
It may be performed in the counterclockwise direction CCW. In this case, as shown in (3) of FIG. 7 (B), the mover 22 keeps the contact state with the origin index portion 11 while the hour wheel 1
The movable member 22 and the fixed contact 21 eventually come into contact with each other in a direction approaching the fixed contact 21 with the rotation of.

However, the fixed contact 21 and the mover 22
7B, the contact switch 2 is turned on. This ON state is detected by a detection system (not shown) via the output terminal 23, and the rotation of the pulse motor is stopped. Hours (minutes) as shown in (3)
The origin indicator 11 of the wheel wheel 1 stops at a position shifted from the origin position O by an angle α, and there is a disadvantage that an accurate origin search cannot be performed.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a timepiece device capable of stopping an hour (minute) hand wheel at an origin position regardless of a rotation direction of a motor at the time of starting. It is in.

[0009]

In order to achieve the above object, a timepiece device according to the present invention comprises a wheel having an origin index portion, a wheel rotating means capable of rotating the wheel in forward and reverse directions, and a fixed wheel.
A movable contact having elasticity that is at least partially fixed to the contact
And the movable contact and the wheel
Based on the elastic force generated when the
The origin is detected by bringing the movable contact into contact with the fixed contact, and origin detection means for outputting a detection signal, and when the detection signal from the origin detection means is inputted, the rotation of the wheel is stopped by the wheel rotation means. After the rotation is stopped, when a detection signal is input by the origin detecting means after a lapse of a predetermined time, the wheel wheel rotating means may include control means for rotating the wheel in a direction opposite to the rotation direction before the stop. I made it.

In the timepiece device of the present invention, a wheel having an origin indicator, a wheel rotating means capable of rotating the wheel in forward and reverse directions in response to a drive pulse, and a fixed contact and at least a part thereof are fixed.
The movable contact with fixed elasticity is
And the movable contact and the reference point of the wheel wheel are engaged.
The movable contact contacts the fixed contact based on the elastic force
An origin detecting means for detecting the origin by touching and outputting a detection signal, and a cow counting the drive pulse of the wheel driving means when a detection signal is inputted by the origin detecting means.
And a detection signal from the origin detecting means are input.
The direction of rotation of the wheel is reversed by the wheel driving means,
When the count value of the
No. rotated by reversing again the rotational direction of the count by needle car counting means is input needle wheel rotating means, those
When the count exceeds a predetermined value, a detection signal is input.
Control means for continuously rotating until force is applied .

[0011]

According to the present invention, when the power is turned on or the reset switch is pressed, the wheel is rotated in a predetermined direction, for example, clockwise by the wheel rotating means. Next, the origin index portion of the wheel and the movable contact of the origin detection means are linked.
The movable contact is fixed based on the elastic force generated at that time.
It comes into contact with the constant contact, whereby the origin position is detected, and a detection signal is output to the control means. The control means stops the rotation of the wheel by the wheel rotating means in response to the input of the detection signal. Next, after a certain period of time has elapsed since the stop of the wheel, it is determined whether or not a detection signal has been input. If it is determined that the detection signal has not been input, the wheel is stopped at the normal origin position. Then, the origin search operation is terminated.

On the other hand, if it is determined that a detection signal has been input after a certain period of time has elapsed after stopping the wheel,
The control means causes the wheel rotating means to rotate the wheel in a direction opposite to the initial rotation direction, for example, in a counterclockwise direction.
The control means determines from the reversal of the rotation direction whether or not a detection signal has been input next. When the detection signal is input, the rotation of the wheel is stopped by the wheel rotation means, and an origin search operation is performed. To end.

According to the present invention, when the power is turned on or the reset switch is pressed, the wheel is rotated in a predetermined direction, for example, clockwise by the wheel rotating means.
Next, the origin index part of the wheel and the movable contact of the origin detection means
Engages, and the movable contact
Contacts the fixed contact, thereby detecting the origin position,
The detection signal is output to the control means. The control means rotates the wheel in a direction opposite to the initial rotation direction, for example, in a counterclockwise direction by the wheel rotation means in response to the input of the detection signal. Also, from the time of the reverse rotation, the counting means starts counting the drive pulse of the wheel driving means. The control means
From the reversal of the rotation direction, it is determined whether or not the next detection signal has been input within a predetermined count, and if it is determined that the detection signal has been input within the predetermined count, the wheel wheel rotating means Is rotated again in the reverse direction, that is, clockwise, and is rotated by an angle corresponding to the count number of the counting means at this time.

On the other hand, when the detection signal is not inputted within the predetermined count, the wheel is kept rotated in the first reverse direction and is continuously rotated until the detection signal is inputted.
Next, the control means determines whether or not a detection signal has been input. When the detection signal is input, the rotation of the wheel is stopped by the wheel rotation means, and the origin search operation is terminated.

[0015]

FIG. 1 is a block diagram showing a first embodiment of a timepiece device according to the present invention, and the same components as those of FIG. 7 showing a conventional example are denoted by the same reference numerals. That is, 1 is an hour hand (or minute hand), 11 is an origin indicator, 2 is a contact switch, 21 is a fixed contact, 22 is a mover, 23 is an output terminal,
3 is a contact on detection circuit, 4 is an oscillation circuit, 5 is a control circuit,
Reference numeral 6 denotes a motor drive circuit, and reference numeral 7 denotes a pulse motor (M) that can rotate forward and reverse.

The contact on detection circuit 3 receives the output of the output terminal 23 when the fixed contact 21 of the contact switch 2 and the movable element 22 are in contact with each other, and detects that the contact switch 2 is on, The detection signal DT is output to the control circuit 5. The oscillation circuit 4 generates a reference signal BS having a predetermined frequency and outputs the signal to the control circuit 5.

The control circuit 5 receives the reference signal BS from the oscillation circuit 4, generates a drive pulse signal DR for driving the pulse motor, outputs the drive pulse signal DR to the motor drive circuit 6, and detects the drive pulse signal DR by the contact on detection circuit 3. The driving state and the rotation direction of the pulse motor 7 are controlled according to the input state of the signal DT. Further, for example, when drive pulse signal DR is 360
The pulse motor 7 is configured to make one rotation with a pulse.

Here, a control example of the origin search operation of the control circuit 5 will be described with reference to the flowchart of FIG. When the power is turned on or a reset switch (not shown) is pressed, a drive pulse signal DR is generated in response to the reference signal BS of the oscillation circuit 4, and the drive pulse signal DR is output to the motor drive circuit 6 to output a pulse. Motor 7 in a predetermined direction,
For example, it is rotated one step in the clockwise direction CW (S1). As a result, the hour wheel 1 rotates in the clockwise direction CW by a predetermined angle. Next, the origin indicator 1 of the hour wheel 1
1 and the cooperating action of the mover 22 of the contact switch 2,
When the mover 22 and the fixed contact 21 come into contact with each other, the contact switch 2
Turns on, and the detection signal DT from the contact on detection circuit 3
It is determined whether or not has been input (S2).

If it is determined in step S2 that the detection signal DT has not been input, the operation returns to step S1 to further rotate the pulse motor 7 in the clockwise direction CW by one.
Rotate by steps. On the other hand, if it is determined that the detection signal DT has been inputted, the output of the drive pulse signal DR to the motor drive circuit 6 is stopped to determine whether or not the time t ₁ has elapsed since the pulse motor 7 was stopped. Make a determination (S
3) If it is determined that the time has elapsed, the contact ON detection circuit 3
It is determined whether or not the detection signal DT is input (S4). In this step S4, the detection signal DT
If it is determined that is not input, contact switch 2
The contact state between the mover 22 and the fixed contact 21 is released,
It is determined that the rotation direction of the pulse motor 7 is the clockwise direction CW, and the origin search control ends.

On the other hand, in step S4, the detection signal D
If it is determined that T has been input, the contact state between the mover 22 of the contact switch 2 and the fixed contact 21 is maintained, and the rotation direction of the pulse motor 7 is counterclockwise CCW.
The driving pulse signal DR is supplied to the motor driving circuit 6 so as to rotate the pulse motor 7 in a direction opposite to the above initial rotation direction, that is, in the clockwise direction CW.
And the pulse motor 7 is reversed (S5). As a result, the pulse motor 7 rotates one step in the clockwise direction CW (S6), and the hour wheel 1 rotates by a predetermined angle in the clockwise direction CW.

Next, the pulse motor 7 is turned clockwise CW.
Then, it is determined whether or not the detection signal DT by the contact-on detection circuit 3 has been input (S7). If it is determined in step S7 that the detection signal DT has not been input, the operation returns to step S6, and the pulse motor 7 is further rotated in the clockwise direction CW by one step. On the other hand, if it is determined that the detection signal DT has been input, the output of the drive pulse signal DR to the motor drive circuit 6 is stopped, and the rotation of the pulse motor 7 is stopped.
The origin search control ends.

Next, an operation example of the configuration of FIG. 1 will be described with reference to FIG. When the power is turned on or the reset switch is pressed, first, the control circuit 5 receives the reference signal BS of the oscillation circuit 4, generates a drive pulse signal DR, and outputs the drive pulse signal DR to the motor drive circuit 6. 7 is rotated clockwise CW. As a result, the hour wheel 1 is rotated (normally rotated) in the clockwise direction CW as shown in FIG. At this time, the L-shaped fixed contact 21 of the contact switch 2 and the plate-shaped movable element 22 are parallel to each other and are in a non-contact state. With the rotation of the hour wheel 1 in the forward direction, the contact switch 2 is attached to the side of the column-shaped origin index portion 11 provided at a predetermined position of the hour wheel 1 as shown in FIG. The movable element 22 having elasticity comes into contact with the movable element 22.

The mover 22 slides while maintaining the state of contact with the origin index portion 11, and flexes in a direction away from the fixed contact 21 with the rotation of the hour wheel 1; The contact state with the part 11 is released. As a result, the mover 22 bends in the direction of the fixed contact 21 due to the urging force when the contact state is released, and comes into contact with the fixed contact 21. The contact time in this case, the movable element 22 to return to the initial state by an elastic force thereof, shorter than the time t _1. When the fixed contact 21 and the mover 22 come into contact with each other,
The contact switch 2 is turned on, and a signal indicating this on state is input to the contact on detection circuit 3 via the output terminal 23. Thereby, the detection signal DT is generated in the contact ON detection circuit 3 and output to the control circuit 5.

[0024] In the control circuit 5, with the input of the detection signal DT by contacts on detection circuit 3, is the output of the driving pulse signal DR is stopped, due to the contact on detection circuit 3 after a time t ₁ elapses from the stop of the pulse motor 7 It is determined whether or not the detection signal DT has been input.
After _one elapse, the mover 22 and the fixed contact 21 are in a non-contact state, and the contact switch 2 is in an off state. Therefore, the detection signal DT is not input, and the pulse motor 7 is kept in a stopped state. ), The hour wheel 1 is stopped at the origin position O, and the origin search is terminated.

On the other hand, if the origin search is performed not in the clockwise direction but in the counterclockwise direction CCW as shown in FIG. Abuts against the origin index portion 11 and, while maintaining this contact state, the fixed contact 2
1 and the movable element 22 comes into contact with the fixed contact 21 as shown in FIG. 3 (5). At this time, since the hour wheel 1 is in contact with the mover 22,
The contact time of the fixed contact 21 and is longer than the time t _1. When the fixed contact 21 and the movable element 22 come into contact with each other, the contact switch 2 is turned on, and a signal indicating this on state is input to the contact on detection circuit 3 via the output terminal 23. Thereby, the detection signal DT is generated in the contact ON detection circuit 3 and output to the control circuit 5.

In the control circuit 5, the output of the drive pulse signal DR is stopped in response to the input of the detection signal DT by the contact on detection circuit 3, and the contact on detection circuit 3 detects the time t ₁ after the stop of the pulse motor 7. It is determined whether or not the detection signal DT has been input.
After _one elapse, the mover 22 and the fixed terminal 21 are still in contact with each other and the contact switch 2 is in the on state. Therefore, it is determined that the detection signal DT is being input, and the pulse motor 7
Is determined to be counterclockwise CCW, and the drive pulse signal DR is supplied to the motor so that the pulse motor 7 rotates in the opposite direction to the initial rotation described above, that is, clockwise CW. It is output to the drive circuit 6. Thus, the hour wheel 1 is rotated (forward) in the clockwise direction CW as shown in FIG. At this time, the fixed contact 21 and the mover 22 of the contact switch 2 are parallel to each other and are in a non-contact state. With the rotation in the positive direction of the hour wheel 1, eventually, as shown in FIG. 3 (7), the origin indicator portion 11 in the hour wheel 1
The mover 22 of the contact switch 2 is in contact with the side surface of the contact switch 2.

In this case, similarly to the above-described operation at the time of the forward rotation, the mover 22 slides while maintaining the state of contact with the origin index portion 11, and the fixed contact 2
Although it bends in the direction away from 1, it comes close to the origin position and the state of contact with the origin index portion 11 is released. As a result, the mover 22 bends in the direction of the fixed contact 21 due to the urging force when the contact state is released, and comes into contact with the fixed contact 21. When the fixed contact 21 and the movable element 22 come into contact with each other, the contact switch 2 is turned on, and a signal indicating this on state is input to the contact on detection circuit 3 via the output terminal 23. Thereby, the detection signal DT is generated in the contact ON detection circuit 3 and output to the control circuit 5.

In the control circuit 5, in response to the input of the detection signal DT by the contact ON detection circuit 3, the output of the drive pulse signal DR is stopped, and the rotation of the pulse motor 7 is stopped.
Thus, as shown in FIG. 3 (3), the hour wheel 1 is stopped at the origin position O, and the origin search ends.

As described above, according to the present embodiment,
Monitoring the time of the on-state contact switch 2 by an input to the control circuit 5 of the detection signal DT, if the time of the on state is shorter than the time t ₁ set in advance, the input of the detection signal DT determines that forward Exit origin search by the pulse motor 7 is stopped due to, when the on-state time is longer than the time t ₁ is rotated forward the pulse motor 7 is determined that the reverse rotation, the input of the next detection signal DT Since the origin search is terminated by stopping the pulse motor 7, hours (minutes) are set at the origin position regardless of the rotation direction of the motor at startup.
The wheel can be stopped, and a highly accurate timepiece can be realized.

[0030]

Second Embodiment FIG. 4 is a block diagram showing a second embodiment of the timepiece device according to the present invention. This embodiment is different from the first embodiment in that the number of pulses of the drive pulse signal DR by the control circuit 5a is counted up or down, the detection signal DT is not input within a predetermined count, and the count number CNT is set in advance. A counter 8 that stops counting when the number reaches the preset number N and resets the count to zero, and controls the rotation of the pulse motor 7 in accordance with the detection signal DT by the contact-on detection circuit 3 and the count number of the counter 8. It is in.

Here, a control example of the origin search operation of the control circuit 5a and an operation example of the counter will be described with reference to the flowchart of FIG. When the power is turned on or the reset switch is pressed, the reference signal BS of the oscillation circuit 4 is
In response to this, a drive pulse signal DR is generated, and the drive pulse signal DR is output to the motor drive circuit 6 to rotate the pulse motor 7 in a predetermined direction, for example, clockwise CW by one step (ST1). As a result, the hour wheel 1 rotates in the clockwise direction CW by a predetermined angle. Next, hour hand wheel 1
, The movable member 22 and the fixed contact 21 come into contact with each other, the contact switch 2 is turned on, and the detection signal DT from the contact-on detection circuit 3 is output. It is determined whether or not an input has been made (ST
2).

If it is determined in step ST2 that the detection signal DT has not been input, the operation returns to step ST1, and the pulse motor 7 is further rotated in the clockwise direction CW by one step. On the other hand, if it is determined that the detection signal DT has been input, the driving pulse signal DR is output to the motor driving circuit 6 so as to rotate the pulse motor 7 in a direction opposite to the initial rotation direction, and the pulse motor 7 is driven. Is reversed (ST3). Accordingly, the pulse motor 7 rotates one step in the counterclockwise direction CCW (ST
4) The hour wheel 1 rotates a predetermined angle in the counterclockwise direction CCW. At this time, the control circuit 5a outputs a control signal CTL instructing the counter 8 to start counting up. The counter 8 counts the number of pulses PUL sent from the motor drive circuit 6 in response to the input of the control signal CTL from the control circuit 5a (ST5). Specifically, “1” is added to the current count number CNT.

Next, after outputting the control signal CTL, that is, the control circuit 5a determines whether or not the pulse number CNT of the counter 8 has reached a preset count number N since the start of counting (ST6). ), If it is determined that it has not reached, the detection signal DT by the contact ON detection circuit 3
It is determined whether or not has been input (ST7). If it is determined that the detection signal DT has not been input, step ST
4, the pulse motor 7 is turned counterclockwise CC
W is further rotated by one step.

On the other hand, if it is determined that the detection signal DT has been input, it is determined that the initial rotation direction is the clockwise direction CW, and then it is reversed and is rotating in the counterclockwise direction CCW. Move the motor 7 in the counterclockwise direction CC
Drive pulse signal DR so that it rotates in the opposite direction CW to W
Is output to the motor drive circuit 6 to reverse the pulse motor 7 (ST8). Thus, the pulse motor 7 rotates one step in the clockwise direction CW (ST9), and the hour wheel 1
Rotates in the clockwise direction CW by a predetermined angle. At this time, the detection signal DT from the contact-on detection circuit 3 is input to the counter 8, and the counter 8 starts a countdown operation of subtracting “1” from the current count number CNT in response to the input of the detection signal DT (ST10). , This counter 8
Is input to the control circuit 5a.

The control circuit 5a determines whether or not the count number CNT of the counter 8 has become "0" (ST1).
1) The operations of steps ST9 to ST11 are repeated until “0” is reached, and the motor drive circuit 6 of the drive pulse signal DR
Output, and when it becomes “0” (ST1
1) Stop the output of the drive pulse signal DR to the motor drive circuit 6, stop the rotation of the pulse motor 7, and end the origin search control.

On the other hand, if it is determined in step ST6 that the count number CNT has reached the set number N, a control signal CTL for resetting the counter 8 is output to the counter 8 (ST12). As a result, the counter 8 is reset to zero, and after the reset, the counting operation is stopped and the count value is held at “0”. At this time, the pulse motor 7 rotates clockwise CW by one step in accordance with the drive pulse signal DR (ST13).

Next, after outputting the reset control signal CTL to reset the counter 8, the control circuit 5a determines whether or not the detection signal DT by the contact ON detection circuit 3 has been input (ST14). If it is determined in step ST14 that the detection signal DT has not been input, the operation returns to step ST13, and the pulse motor 7 is further rotated in the clockwise direction CW by one step. On the other hand, if it is determined that the detection signal DT has been input, the rotation direction of the pulse motor 7 is the clockwise direction CW and the count number CNT is “0” (ST11). The output to the circuit 6 is stopped, the rotation of the pulse motor 7 is stopped without reversing, and the origin search control is ended.

Next, an operation example of the configuration of FIG. 4 will be described with reference to FIG. When the power is turned on or the reset switch is pressed, the control circuit 5a receives the reference signal BS of the oscillation circuit 4 and receives the drive pulse signal DR.
Is generated, output to the motor drive circuit 6, and the pulse motor 7 is rotated in the clockwise direction CW. This allows
The hour wheel 1 moves clockwise CW as shown in FIG.
Is rotated (forward rotation). At this time, the fixed contact 21 and the mover 22 of the contact switch 2 are parallel to each other and are in a non-contact state. With the rotation of the hour wheel 1 in the forward direction, FIG.
As shown in (2), the movable element 22 of the contact switch 2 comes into contact with the side surface of the columnar origin index portion 11 provided at a predetermined position of the hour wheel 1.

The mover 22 slides while maintaining the state of contact with the origin index portion 11, and flexes in a direction away from the fixed contact 21 with the rotation of the hour wheel 1; The contact state with the part 11 is released. As a result, the mover 22 bends in the direction of the fixed contact 21 due to the urging force when the contact state is released, and comes into contact with the fixed contact 21. When the fixed contact 21 and the mover 22 come into contact with each other,
The contact switch 2 is turned on, and a signal indicating this on state is input to the contact on detection circuit 3 via the output terminal 23. As a result, a detection signal DT is generated in the contact-on detection circuit 3 and output to the control circuit 5a.

In the control circuit 5a, in response to the input of the detection signal DT by the contact-on detection circuit 3, the drive pulse signal DR is driven by the motor drive circuit so that the pulse motor 7 rotates in the CCW direction opposite to the clockwise direction CW. 6 and the rotation direction of the pulse motor 7 is reversed. As a result, the hour wheel 1 is rotated in the counterclockwise direction CCW as shown in FIG. At this time, the control circuit 5a outputs a control signal CTL instructing the counter 8 to start counting up. In the counter 8, the control circuit 5a
Input of the control signal CTL by the motor drive circuit 6
Are counted.

Next, in the control circuit 5a, the control signal CTL
Is output, that is, it is determined whether or not the pulse number CNT of the counter 8 has reached a preset count number N since the counting was started. Is determined whether or not the detection signal DT is input. If it is determined that the detection signal DT has been input within the set count number N, it is determined that the initial rotation direction is the clockwise direction CW, and then it is reversed and rotated in the counterclockwise direction CCW. The drive pulse signal DR is output to the motor drive circuit 6 by the control circuit 5a so as to rotate the pulse motor 7 in the direction CW opposite to the above-described counterclockwise direction CCW, and the pulse motor 7 is rotated in the reverse direction. As a result, the hour wheel 1 is rotated in the clockwise direction CW as shown in FIG. At the time of the reverse rotation, the counter 8 stops the count-up operation. At this time, the detection signal DT from the contact-on detection circuit 3 is input to the counter 8, and the detection signal D
The countdown operation is started by the input of T, and the value of the counter 8 is input to the control circuit 5a.

In the control circuit 5a, the output of the drive pulse signal DR to the motor drive circuit 6 is continued until the count number CNT of the counter 8 becomes "0". The output of the DR to the motor drive circuit 6 is stopped, and the rotation of the pulse motor 7 is stopped.
As shown in (5), the hour wheel 1 is stopped at the origin position O,
The origin search control ends.

On the other hand, if the origin search is performed not in the clockwise direction but in the counterclockwise direction CCW as shown in FIG. 6 comes into contact with the origin index portion 11, slides while maintaining this contact state, and flexes in a direction approaching the fixed contact 21 with the rotation of the hour wheel 1, as shown in FIG.
Eventually, the mover 22 comes into contact with the fixed contact 21. When the fixed contact 21 and the movable element 22 come into contact with each other, the contact switch 2 is turned on, and a signal indicating this on state is output from the output terminal 2.
The signal is input to the contact-on detection circuit 3 via the switch 3. As a result, a detection signal DT is generated in the contact-on detection circuit 3 and output to the control circuit 5a.

In the control circuit 5a, in response to the input of the detection signal DT by the contact-on detection circuit 3, the control circuit 5a causes the drive pulse signal to rotate the pulse motor 7 in the direction CW opposite to the above-mentioned counterclockwise direction CCW. DR is output to the motor drive circuit 6, and the pulse motor 7 is reversed. Thus, the hour wheel 1 is rotated in the clockwise direction CW as shown in FIG. At this time, the control circuit 5a
Outputs a control signal CTL instructing the counter 8 to start counting up. The counter 8 counts the number of pulses PUL sent from the motor drive circuit 6 in response to the input of the control signal CTL from the control circuit 5a.

Next, in the control circuit 5a, the control signal CTL
Is output, that is, it is determined whether or not the pulse number CNT of the counter 8 has reached a preset count number N since the counting was started. It is determined whether or not the detection signal DT has been input by the user. In this case, the hour wheel 1
Is rotating in the clockwise direction CW, the count number N
During this time, the contact switch 2 is not turned on, and the counter 8 counts up to the set number N. If it is determined that the count number CNT has reached the set number N, specifically, the control circuit 5a resets the counter 8 when the origin index unit 11 reaches the position shown in FIG. Is output to the counter 8, and the counter 8 is reset. After resetting, the counter 8 stops counting and holds the count value at “0”. The rotation control of the hour wheel 1 in the clockwise direction CW is continued after the reset operation.

With the rotation of the hour wheel 1 in the forward direction, the movable element 22 of the contact switch 2 comes into contact with the side surface of the hour indicator 1 origin indicator 11 as shown in FIG. 6 (9). In this case, similarly to the operation at the time of the forward rotation described above, the mover 22
While the abutment state with respect to the origin index portion 11 is maintained, it is bent in a direction away from the fixed contact 21 with the rotation of the hour wheel 1, but near the origin position, the contact state with the origin index portion 11 is released. As a result, the mover 22 bends in the direction of the fixed contact 21 due to the urging force when the contact state is released, and comes into contact with the fixed contact 21. When the fixed contact 21 and the movable element 22 come into contact with each other, the contact switch 2 is turned on, and a signal indicating this on state is input to the contact on detection circuit 3 via the output terminal 23. As a result, a detection signal DT is generated in the contact-on detection circuit 3 and output to the control circuit 5a.

In the control circuit 5a, in response to the input of the detection signal DT by the contact-on detection circuit 3, the output of the drive pulse signal DR is stopped, and the rotation of the pulse motor 7 is stopped.
Thus, as shown in FIG. 6 (5), the hour wheel 1 is stopped at the origin position O, and the origin search ends.

As described above, in the second embodiment, the same effects as in the first embodiment can be obtained.

In each of the above embodiments, only the hour wheel is described. However, the same origin search operation is performed for the minute wheel with the same configuration, and the same effect as described above can be obtained.

[0050]

[Effects of the Invention] As described above, according to the present invention,
Always rotate in the fixed direction (clockwise) regardless of the rotation direction of the motor at startup, and then move to the home position for hours (minutes)
Can stop the wheel. Thus, a highly accurate timepiece device can be realized.

[Brief description of the drawings]

FIG. 1 is a configuration diagram showing a first embodiment of a timepiece device according to the present invention.

FIG. 2 is a flowchart illustrating a control operation example of the control circuit in FIG. 1;

FIG. 3 is a diagram for explaining an origin search operation of the timepiece device of FIG. 1;

FIG. 4 is a configuration diagram showing a second embodiment of the timepiece device according to the present invention.

5 is a flowchart illustrating an example of a control operation of the control circuit of FIG. 4 and an example of an operation of a counter.

FIG. 6 is a diagram for explaining an origin search operation of the timepiece device of FIG. 4;

FIG. 7 is a diagram for explaining an origin search operation in a conventional timepiece device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Hour hand wheel (or minute hand wheel) 11 ... Origin index part 2 ... Contact switch 21 ... Fixed contact 22 ... Mover 23 ... Output terminal 3 ... Contact on detection circuit 4: Oscillation circuit 5, 5a ... Control circuit 6 ... Motor drive Circuit 7: Pulse motor (M) 8: Counter

Claims (2)

(57) [Scope of request for utility model registration] 1. A wheel having an origin indicating portion, a wheel rotating means capable of rotating the wheel in forward and reverse directions, and a fixed contact and at least a part of which has elasticity.
Moving contacts are arranged at predetermined intervals, and the movable contacts and
The elastic force generated when the origin indicator of the wheel is engaged
The origin is detected by contacting the movable contact with the fixed contact based on the origin, and the origin wheel detecting means for outputting a detection signal, and when the detection signal from the origin detecting means is inputted, the rotation of the wheel is stopped by the wheel rotating means. If the detection signal is input by the origin detecting means after a certain period of time after the rotation is stopped, the wheel wheel rotating means has a control means for rotating the wheel in a direction opposite to the rotation direction before the stop. A clock device characterized by the above-mentioned. 2. A wheel having an origin indicator, a wheel rotating means capable of rotating the wheel in forward and reverse directions in response to a drive pulse, and a fixed contact and at least a part of which has elasticity.
Moving contacts are arranged at predetermined intervals, and the movable contacts and
The elastic force generated when the origin indicator of the wheel is engaged
Origin detection means for detecting the origin by contacting the movable contact with the fixed contact based on the origin, and outputting a detection signal; and counting means for counting the drive pulse of the wheel rotating means when the detection signal is inputted by the origin detection means. When the detection signal is input by the origin detecting means,
Reverse the direction of rotation of the wheel to the rotating
A detection signal is input when the count number is smaller than a predetermined value.
Then, the direction of rotation of the wheel is reversed and rotated again by the count of the counting means by the wheel rotating means, and the count number
Is greater than or equal to the specified value until the detection signal is input.
A timepiece device comprising: control means for continuously rotating .