JPH0559385U - Pointer display position correction mechanism for electronic timepieces - Google Patents

Abstract

(57) [Abstract] [Purpose] The present invention aims to obtain a display position correction mechanism of a pointer which is easy to operate. A correction pulse generating circuit 14 for generating a predetermined number of correction pulses in synchronization with a winding stem withdrawing operation is provided.
Each time the winding stem is withdrawn, the stepping motor is driven by the correction pulse through the drive circuit to correct the display position of the pointer. [Effect] A slight time delay can be easily corrected.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a pointer display position correcting mechanism in an electronic timepiece having a second hand, a minute hand and an hour hand.

[0002]

[Prior Art]

 Recent electronic timepieces have very good time accuracy, and only a dozen seconds per month for high-end products, and only a dozen seconds for a high-grade product in a year. With such an electronic timepiece, a time lag of a few dozen seconds, or even a few seconds, is annoying.

Incidentally, in the conventional electronic timepiece, when the winding stem withdrawing operation is performed, the frequency dividing circuit is reset and the second hand is stopped, and the display position of the minute hand and the hour hand is corrected by the winding stem rotating operation after the winding stem withdrawing operation. Is becoming

Therefore, when the time has advanced by a few seconds, generally, the winding stem withdrawing operation is performed to stop the second hand immediately after the second hand reaches the 12 o'clock position, and when the correct time reaches the second hand stop position. Since the time can be adjusted to the correct time simply by pushing the winding stem, the operation is simple and requires only a few seconds.

[0005]

[Problems to be solved by the device]

 However, if the time is delayed by a few seconds and you want to set it to the correct time, first perform the winding stem withdrawing operation as if the time had advanced, but then rotate the winding stem to move the minute hand and hour hand. It is necessary to advance for about 1 minute. Also, it takes about one minute before the correct time reaches the second hand stop position, which makes the operation time-consuming and troublesome.

Further, there is an electronic timepiece of a type in which a pulse is generated from a circuit when the display position of the pointer is corrected and the step motor is driven to correct the display position of the pointer. However, one step motor is used for the second hand, the minute hand, When trying to drive the hour hand, it takes a very long time to make a significant correction to the display position of the minute hand and hour hand when changing batteries. For this reason, the conventional electronic timepiece of this system uses two step motors, a step motor for driving the second hand that moves every second and a step motor for driving the hand every 20 seconds, for example, and a step motor for driving the hour hand. The display position is corrected by the combination operation of the winding stem and the push button, which makes the mechanism complicated and expensive.

[0007]

[Problems to be solved by the device]

 An object of the present invention is to solve the above-mentioned drawbacks of the conventional electronic timepiece and to provide an electronic timepiece which is inexpensive and can correct the delay of the second hand by a simple operation.

[0008]

[Means for Solving the Problems]

 The mechanism for correcting the display position of the pointer in the electronic timepiece according to the present invention includes an oscillation circuit, a frequency dividing circuit, a hand movement pulse creating circuit, a hand movement pulse distribution circuit, and a hand movement pulse output from this hand movement pulse distribution circuit. Step motor driven by the drive circuit, which is composed of a drive circuit operated by, a drive coil, a stator, and a rotor, and a time display for displaying seconds, minutes, and hours driven by the step motor. Wheel train, a reset circuit that stops the hand movement pulse in synchronization with the winding stem withdrawing operation, and a rotation operation after the winding stem withdrawing operation is transmitted to the time display wheel train to display the display positions of the minute hand and the hour hand. An electronic timepiece having a pointer display position correcting train wheel for correction is provided with a correction pulse generating circuit that generates a predetermined number of correction pulses in synchronization with the winding stem withdrawing operation. To the above Wherein via the drive circuit by a pulse stepper - and performing correction of the display position of the pointer by driving the motor.

[0009]

【Example】

 The present invention will be described in detail below with reference to the drawings.First, the case where the second hand is stopped by the winding stem withdrawing operation and the display positions of the minute hand and the hour hand are significantly corrected by the winding stem rotating operation after the winding stem withdrawing operation is described. To do.

FIG. 2 is a schematic plan view of an electronic timepiece according to the present invention. Reference numeral 21 is a step motor, which is composed of a coil 21a, a stator 21b and a rotor 21c. The coil 21b has a solid arrow direction and a dotted line. The rotor 21c rotates by 180 degrees by the alternating current flowing in the direction of the arrow every 1 second. This rotation is transmitted to the fifth wheel 22, the fourth wheel 23, the third wheel 24, the second wheel 25, the Hino back wheel 26, and the hour wheel 27, and is transmitted to the fourth wheel 23, the second wheel 25, and the hour wheel 27. The time is displayed by the attached second hand 30, minute hand 31, and hour hand 32.

When the winding stem 33 is pulled out in the direction of the dotted arrow at the time correction, the signal is not applied to the coil 21b, the second hand stops, and the spiral wheel 28 moves in the direction of the dotted arrow to mesh with the iron wheel 29. When the winding stem 33 is rotated from the state, this rotation is transmitted to the spiral wheel 28, the hour wheel 29, and the sun wheel 26 which meshes with the hour wheel 29 to correct the display positions of the minute hand 31 and the hour hand 32. Since the second wheel & pinion 25 has a known slip mechanism, the fourth wheel & pinion 23 does not rotate even if the second wheel & pinion 25 rotates.

Next, the circuit portion of the electronic timepiece according to the present invention will be described with reference to FIG. FIG. 1 is a circuit block diagram of an electronic timepiece according to the present invention, in which 1 is an oscillating circuit, and 2 is a frequency dividing circuit, which receives a signal from the oscillating circuit 1 as an input and divides the signal until a signal necessary for driving the timepiece is obtained. Reference numeral 3 is a hand movement pulse generation circuit which generates and outputs a pulse every second from a plurality of signals of the frequency dividing circuit 2. Reference numeral 4 is a hand movement pulse distribution circuit which is composed of a toggle flip-flop (hereinafter referred to as T-FF) 5 and two AND gates 6 and 7, and an input end T of the T-FF 5 is a hand movement via an ogate 8. It is connected to the pulse generating circuit 3 and a correction pulse generating circuit 14 to be described later. One input terminal of the AND gates 6 and 7 is connected to the output terminal Q and the inverted Q of the T-FF 5, respectively, and the other input terminal. Are respectively connected to the object 8.

Reference numeral 9 denotes a drive circuit, two input terminals of which are connected to AND gates 6 and 7, respectively. Reference numeral 10 is a coil, and 21c is a rotor. Both ends of the coil 10 are connected to the output terminals of the drive circuit 9, and the rotor 21c meshes with the time display wheel train as shown in FIG. 33 is a winding stem, and 13 is a switch, which is connected to VDD or VSS of the power source in association with the pulling-out operation or the pushing-in operation of the winding stem 33. Reference numeral 14 is a correction pulse generating circuit, the input end of which is connected to the frequency dividing circuit 2 and the control end C of which is connected to the AND gate 15. The two input terminals of the AND gate 15 are connected to the OR gate 8 via the switch 13 and the inverter 16.

Reference numeral 17 denotes a set-reset flip-flop (hereinafter referred to as SR-FF), the set end S is connected to the correction pulse generation circuit 14, and the reset end R is connected to the switch 13 via the inverter 18. There is. The output terminal Q is connected to the reset terminal R of the frequency dividing circuit 2.

Next, the operation will be described. First, the case where the watch is in the normal use state with the winding stem 33 pushed in as shown by the solid line in FIG. 1 will be described. In this case, since the switch 13 is connected to VSS, the output of the AND gate 15 becomes the L signal, and the H signal is applied to the reset end R of the SR-FF 17 via the inverter 18. The L signal is output from the output terminal Q, and the frequency dividing circuit 2 is not reset. Further, since the output of the AND gate 15 is the L signal, the correction pulse generating circuit 14 does not generate the correction pulse. Therefore, a pulse every 1 second as shown in FIG. 3 (A) is output from the hand movement pulse generation circuit 3 and applied to the T-FF 5 via the ogate 8. Therefore, the AND gates 6 and 7 output alternating pulses every 1 second as shown in FIGS. 3B and 3C and are applied to the drive circuit 9. When the hand movement pulse is applied to the drive circuit 9, alternating current flows in the coil 10 in the directions of the solid arrow and the dotted arrow, and the rotor 11 rotates by 180 degrees each time and the train wheel rotates. The time is displayed by the pointer attached to.

Next, a description will be given of the operation when a slight time error occurs and the correction is made. First, the correction operation when the time is advanced will be described. When the winding stem 33 is pulled out to the position shown by the dotted line in FIG. 1 just before the second hand reaches the position of 12:00 before the 12 o'clock position, that is, at the position of 59 seconds, the switch 13 is connected to VDD in conjunction with this operation, Therefore, the L signal is applied to the reset end R of the SR-FF 17 via the inverter 18, and the H signal is applied to one end of the AND gate 15. Since the H signal is applied to the other end of the AND gate 15 except when the hand movement pulse is generated, the H signal is applied to the control end C of the correction pulse generating circuit 14. At this time, the correction pulse generating circuit 14 generates a predetermined number of pulses, that is, one correction pulse as shown in FIG. 4 in this embodiment.

Since this correction pulse is applied to the set end S of the SR-FF 17, the Q output of the SR-FF 17 becomes an H signal, and a part of the frequency dividing circuit 2 is reset, that is, 1 KHZ or less in this embodiment. The reset end is reset and the hand movement pulse is no longer generated. At the same time, the correction pulse is applied to the input terminal T of the T-FF5, the AND gate 6 and the AND gate 7 via the ogate 8. Therefore, the rotor 21c is driven by this correction pulse, and the second hand moves to the 12 o'clock position. In this state, wait for the correct time to come, and when the correct time comes, perform the winding stem pushing operation shown in FIG.

When the winding stem pushing operation is performed, as shown in FIG. 1, the winding stem 12 moves to the position shown by the solid line and the switch 13 is connected to VSS. Therefore, the H signal is applied to the reset terminal R of the SR-FF 17 via the inverter 18, and the Q output of the SR-FF 17 becomes the L signal, so that the reset of the frequency dividing circuit 2 is released. One second after the reset of the frequency dividing circuit 2 is released by the operation of pushing the winding stem, a hand movement pulse is output from the hand movement pulse creating circuit 3 as shown in Fig. 4, and the time display is performed by this hand movement pulse. Will be seen.

Next, the correcting operation when the time is slightly delayed, which is the main point of the present invention, will be described. If the clock is delayed by, for example, 3 seconds and it is corrected, first, when the winding stem withdrawing operation is performed as shown in FIG. 5 immediately after the second hand comes to the position of 56 seconds, one correction pulse is corrected as described above. Generated from the pulse generation circuit 14, the second hand moves to the position of 57 seconds. Next, when the winding stem pushing operation is performed within 1 second after the completion of the winding stem drawing operation, and when the winding stem pulling out operation is performed within 1 second after the completion of the winding stem pushing operation, the second hand moves to 58 seconds as described above. Move to position. If the operation of pushing in the winding stem and the operation of pulling out the winding stem are each repeated twice within 1 second, the second hand moves to the 12 o'clock position. In this way, if the winding stem push-in operation and the winding stem pull-out operation are performed a total of 4 times within 3 seconds, the second hand moves to the 12 o'clock position ahead of the correct time. After that, when the winding stem pushing operation is performed when the time coincides with the correct time, a hand movement pulse is generated 1 second later, and thereafter, the drive is performed by the normal hand movement pulse.

FIG. 6 shows another embodiment according to the present invention. When the winding stem withdrawing operation is performed once, the correction pulse generating circuit 14 collectively generates five correction pulses within one second. There is. Based on the embodiment shown in FIG. 6, a case where the clock is delayed by 3 seconds and is corrected as described above will be described. First, when the winding stem withdrawing operation is performed immediately after the second hand reaches the position of 55 seconds, the second hand moves to the 12 o'clock position by fast forward. After that, if the winding stem pushing operation is carried out at the correct time, a hand movement pulse is generated after 1 second, and thereafter, the drive is performed by the normal hand movement pulse in the same manner as described above. Even when the clock is advanced, it can be corrected by the same operation as above.

As described above, in the embodiment shown in the present invention, it is not necessary to advance the minute hand like the conventional electronic timepiece when the timepiece is slightly delayed, and therefore, the timepiece can be corrected at the same time and the operation can be performed at the same time. Is very simple. If the timepiece is greatly misaligned, such as when the battery is replaced, the winding stem may be rotated after the winding stem withdrawing operation as in the conventional case.

[0022]

【The invention's effect】

 As is apparent from the above description, according to the present invention, even when the timepiece is slightly delayed, the correction can be performed in a short time and with a simple operation, and its effect is great.

[Brief description of drawings]

FIG. 1 is a circuit block diagram of an electronic timepiece showing an embodiment of the present invention.

FIG. 2 is a plan view of a mechanical portion of an electronic timepiece applied to the present invention.

FIG. 3 shows an output waveform of a main part of the circuit block diagram shown in FIG. 1, (A) is an output waveform diagram of a hand movement pulse creating circuit 3,
(B) and (C) are output waveform diagrams of the hand movement pulse distribution circuit 4.

4 is an output waveform diagram of a correction pulse generation circuit 14 in the circuit block diagram shown in FIG.

5 is an output waveform diagram of a correction pulse generation circuit 14 in the circuit block diagram shown in FIG.

6 is an output waveform diagram of a modified pulse generation circuit 14 in another embodiment of the circuit block diagram shown in FIG.

[Explanation of symbols]

 1 Oscillation circuit 2 Dividing circuit 3 Hand movement pulse creation circuit 4 Hand movement pulse distribution circuit 9 Drive circuit 10 Coil 11 Rotor 12 Winding true 13 Switch 14 Corrected pulse generation circuit

Claims (1)

[Scope of utility model registration request] 1. An oscillation circuit, a frequency dividing circuit, a hand movement pulse generation circuit, a hand movement pulse distribution circuit, a drive circuit operated by a hand movement pulse output from this hand movement pulse distribution circuit, a drive coil, and a stator. , Rotor,
A step motor driven by the drive circuit, a time display wheel train for displaying seconds, minutes, and hours driven by the step motor, and a reset for stopping the hand movement pulse in association with the winding stem withdrawing operation. In an electronic timepiece having a circuit and a wheel train for adjusting the pointer display position for correcting the display positions of the minute hand and the hour hand by transmitting the rotation operation after the winding stem withdrawing operation to the time display wheel train, A correction pulse generating circuit for generating a predetermined number of correction pulses in synchronization with the operation is provided, and the step pulse motor is driven by the correction pulse by the correction pulse for each winding stem drawing operation to display the pointer. A mechanism for correcting the display position of a pointer in an electronic timepiece characterized by correcting the position.