JPH11281772A - Electronic time piece - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electronic time piece capable of detecting the rotation state of indication wheel. SOLUTION: A date indicator 1120 and a date indicator driving wheel 1150 are rotatably arranged against a base plate 1102. An ultrasonic rotor pinion of an ultrasonic motor 1134b meshes with an intermediate date wheel 1142a. The date indicator driving wheel 1150a gears with an intermediate date wheel 1142b. A date feeding gear part 1150b gears with a date indicator gear part 1120a. A contact spring 1160 is arranged in a spring guide part 1150b. By the rotation of the date indicator driving wheel 1150, it rotates together with the date indicator driving wheel 1150. By the contact of the contact spring 1160 and a contact pattern 1174, the rotation state of the date indicator driving wheel 1150 is detected.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention has a transmission wheel rotation position detecting device for detecting a position along a rotation direction of a transmission wheel included in a wheel train such as a front wheel train or a calendar wheel train of an electronic timepiece. Related to electronic watches.

[0002]

2. Description of the Related Art In a conventional electronic timepiece, as shown in FIG.
A 24h contact 932 for detecting the 0 rotational position is provided on the hour wheel. When the 24h contact 932 detects the position corresponding to midnight, the circuit block 934 rotates the date feed motor 936 according to the detection signal output from the 24h contact 932. The rotation of the date feed motor 936 causes the reduction gear train 93 to rotate.
The date wheel 912 is rotated via the rotation of the eighth wheel 8. Thereby, the display of the date can be changed. In such a conventional electronic timepiece, the conduction pin is provided in a region near the outer peripheral portion of the gear portion of the hour wheel. When the hour wheel rotates, the conduction pin moves so that the contact spring contacts the contact pattern of the circuit block. Thereafter, when the hour wheel further rotates, the conduction pin separates from the contact spring, and the contact spring moves. Was configured to be separated from the contact pattern of the circuit block. That is, the contact spring corresponds to the 24h contact 932, and is configured to detect a position corresponding to midnight when the contact spring contacts the contact pattern of the circuit block.

[0003] Further, in a structure in which the date dial motor is rotated by the rotation of the date dial motor through the rotation of the date dial intermediate wheel and the date dial is rotated by the rotation of the date dial wheel,
The tooth profile of a date wheel and a date wheel gear has been configured as an arc tooth profile including one or more arc portions. Therefore, when an external force such as an impact is applied to the date indicator, the rotation of the date indicator is prevented only by the index torque of the date feed motor.

[0004]

However, the conventional electronic timepiece has the following problems. (1) Since the contact spring is formed of a flexible material, it is difficult to position a portion of the contact spring that contacts the contact pattern. (2) In order to arrange a contact spring having a sufficient spring length, a large space is required for an electronic timepiece. (3) If the portion of the contact spring that is in contact with the contact pattern is disposed farther than necessary from the contact pattern, the contact pin is used to connect the contact spring to the contact pattern of the circuit block even when the hour wheel rotates. Contact cannot be made, and time display and calendar display cannot be performed accurately. (4) If the portion of the contact spring that contacts the contact pattern is arranged closer than necessary to the contact pattern, the pressure of the contact spring applied to the conduction pin increases when the hour wheel rotates, A malfunction may occur in the operation of the electronic timepiece, or the electronic timepiece may stop.

(5) The structure of the hour wheel becomes complicated, and a contact spring having a sufficient spring length is required. (6) In a conventional electronic timepiece with a calendar provided with a 24h contact for detecting the rotational position of the front train wheel in a part of the front train wheel, a large number of wheel trains are arranged between the front train wheel and the date wheel. Therefore, it was difficult to accurately adjust the position of the date wheel due to the backlash of each wheel train. (7) It has been difficult to increase the accuracy of detecting the position along the rotation direction of the hour wheel. (8) When an external force such as an impact is applied to the electronic watch,
There was a risk that the indicating wheel or date wheel would rotate. In order to prevent such a position shift of the date wheel, it is necessary to increase the index torque (stationary force: torque against rotation when stationary) of the motor. However,
When the index torque of the motor is increased, the electric power required for driving the motor is also increased, and the battery life of the electronic timepiece is reduced.

[0006]

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide an electronic timepiece having a transmission wheel rotation position detecting device for accurately detecting a position along the rotation direction of a transmission wheel in order to solve the conventional problems. To provide. It is another object of the present invention to provide a small electronic timepiece having a transmission wheel rotational position detecting device. Still another object of the present invention is to provide a small and thin electronic timepiece with calendar. Still another object of the present invention is to provide an electronic timepiece having a rotational position detecting device of a transmission wheel with high contact point durability.

Another object of the present invention is to provide an electronic timepiece having a small and simple date feed mechanism and a display wheel detection mechanism. Another object of the present invention is to provide an electronic timepiece in which a display wheel or a date wheel does not rotate even when an external force such as an impact is applied to the electronic timepiece.

[0008]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention relates to an electronic timepiece, wherein the transmission wheel rotates based on the rotation of a train wheel included in the electronic timepiece, and is fixed to the transmission wheel. A contact spring that rotates integrally with the transmission wheel and has electrical conductivity, a detection pattern provided on the circuit board that can contact the contact spring when the contact spring rotates, and a detection pattern provided on the circuit board. And a control circuit for inputting a rotation position detection signal that detects the circumferential position of the rotation of the transmission wheel output by the detection pattern when the detection pattern is contacted. With this configuration, the rotation position of the transmission wheel can be detected using small and simple components.

The detection pattern of the electronic timepiece according to the present invention includes two detection patterns that can simultaneously contact the contact spring when the contact spring rotates, and the control circuit includes two detection patterns. Preferably, the control circuit is a control circuit for inputting a rotation position detection signal for detecting a circumferential position of the rotation of the transmission wheel output by the two detection patterns when the conduction is performed by the contact spring. With this configuration,
The rotational position of the transmission wheel can be reliably detected. Further, the detection pattern of the electronic timepiece of the present invention includes two detection patterns that can simultaneously contact the contact spring when the contact spring rotates, and a detection pattern provided between the two detection patterns. The control circuit determines the circumferential position of the rotation of the transmission wheel output by the two detection patterns when the two detection patterns are conducted by the contact springs. It is preferable that the control circuit is a control circuit for inputting a rotational position detection signal to be detected.

With this configuration, the durability of the pattern on the circuit board can be improved. Further, in the electronic timepiece according to the present invention, a transmission wheel that rotates based on rotation of a train wheel included in the electronic timepiece, and a contact spring that is fixed to the transmission wheel, rotates integrally with the transmission wheel, and has conductivity. A first detection pattern and a second detection pattern provided on the circuit board, the first detection pattern and the second detection pattern being provided on the circuit board so as to be able to contact the contact spring when the contact spring rotates. The second detection pattern is used only for the first detection pattern, the first detection state for generating a rotation position detection signal for detecting the circumferential position of the rotation of the transmission wheel, and only for the second detection pattern. A second detection state for generating a rotation position detection signal for detecting a circumferential position of rotation of the transmission wheel;
And a third detection state for simultaneously generating a rotation position detection signal for detecting the circumferential position of the rotation of the transmission wheel in both the detection pattern and the second detection pattern. Immediately after detecting the detection state of No. 1, the third
And a control circuit for discriminating between a case where the third detection state occurs immediately after detecting the second detection state and a case where the third detection state occurs immediately after detecting the second detection state.

Further, the control circuit of the electronic timepiece according to the present invention determines that the rotation direction of the transmission wheel is normal when the third detection state occurs immediately after the detection of the first detection state. It is preferable that when the third detection state occurs immediately after the detection state is detected, the rotation direction of the transmission vehicle is determined to be reverse rotation. Furthermore, the circuit board of the electronic timepiece of the present invention further has a VDD pattern connected to one potential of the power supply, and the contact spring contacts the first detection pattern, the second detection pattern, and the VDD pattern. The first detection includes three terminal contact portions that can be connected to each other, wherein at least one terminal contact portion is in contact with the VDD pattern and another terminal contact portion is in contact only with the first detection pattern. State, a second detection state in which the other terminal contact portions are in contact only with the second detection pattern, and a second detection state in which the other terminal contact portions are in contact with the first detection pattern and the second detection pattern. In order to be able to take the third detection state
The contact spring, the first detection pattern, and the second detection pattern are configured, and the control circuit determines the rotation direction of the transmission wheel when the third detection state occurs immediately after detecting the first detection state. Is determined to be forward rotation, and when the third detection state occurs immediately after the detection of the second detection state, the rotation direction of the transmission vehicle is preferably determined to be reverse rotation.

With this configuration, the direction of rotation of the transmission wheel can be accurately determined. Further, the present invention provides an electronic timepiece having a function of displaying a date, a time signal generation circuit that counts information about time and generates a time signal,
A time display motor drive circuit that outputs a time display motor drive signal for rotating the time display motor based on a time signal output by the time signal generation circuit, and a time display output by the time display motor drive circuit A time display motor that rotates based on the clock signal, a time display wheel train that rotates based on the rotation of the time display motor, and a time information display member that displays time information based on the rotation of the time display wheel train And a date signal generation circuit that counts information relating to the date to generate a date signal, and a date display motor drive signal for rotating the date display motor based on the date signal output from the date signal generation circuit. A date display motor drive circuit to output, a date display motor rotating based on a date display signal output from the date display motor drive circuit, and a date display motor. A date display wheel train that rotates based on the rotation, a date information display member that displays date information based on the rotation of the date display wheel train, and a start time of date feeding based on the rotation of the time display wheel train , A date feed end detection contact member that detects the end of date feed based on the rotation of the date display wheel train, and a date feed start output by the date feed start detection contact member Feed control circuit for controlling the operation of a date display drive circuit for inputting a signal relating to the end of date feed output from a date feed end detection contact member and outputting a motor drive signal for date display And a configuration having:

With this configuration, it is possible to realize an electronic timepiece with a calendar that can reliably display a date. It is preferable that the date display motor of the electronic timepiece of the present invention is constituted by an ultrasonic motor. Further, the date-feeding start detecting contact member of the electronic timepiece of the present invention is provided on a 24-hour wheel rotated by rotation of the hour wheel, and the date-feeding end detecting contact member is rotated by rotation of the date display motor. Is preferably provided. Further, the present invention, in an electronic timepiece having a function of displaying a date, a time signal generation circuit that counts information about the date and generates a date signal, and based on a date signal output from the time signal generation circuit,
An ultrasonic motor drive circuit for outputting an ultrasonic motor drive signal for rotating the ultrasonic motor, and an ultrasonic stator having a piezoelectric element bonded thereto, and inputting the ultrasonic motor drive signal, the piezoelectric element An ultrasonic motor having an ultrasonic rotor that is frictionally driven by vibration waves generated in the ultrasonic stator due to expansion and contraction, a calendar wheel train rotated by the rotation of the ultrasonic rotor, and a date finger nail rotated by the rotation of the calendar wheel train. A date wheel which is rotated by the rotation of the date feeding finger to display the date, a transmission wheel which is rotated based on the rotation of the ultrasonic rotor, and which is fixed to the transmission wheel, rotates integrally with the transmission wheel, and has conductivity. The contact spring, a detection pattern provided on the circuit board that can contact the contact spring when the contact spring rotates, and a detection when the contact spring contacts the detection pattern. And configured to use pattern and a control circuit for inputting a rotational position detection signal for detecting a circumferential position of the rotation of the transmission wheel to be output.

According to the present invention, in an electronic timepiece having a function of displaying a date, information on the date is counted,
A time signal generating circuit for generating a date signal, an ultrasonic motor driving circuit for outputting an ultrasonic motor driving signal for operating the ultrasonic motor based on the date signal output from the time signal generating circuit, and a piezoelectric element. An ultrasonic motor having an ultrasonic stator joined, and having an ultrasonic rotor driven by a vibration wave generated in the ultrasonic stator by expansion and contraction of a piezoelectric element by inputting an ultrasonic motor drive signal; Rotated by the rotation of the sonic rotor, the calendar wheel train with the date finger, and rotated by the rotation of the date finger,
A date wheel that displays the date, a transmission wheel included in the calendar wheel train and rotated by the rotation of the ultrasonic rotor, a contact spring fixed to the transmission wheel, rotating integrally with the transmission wheel, and having conductivity, and a contact point. When the spring rotates, the contact pattern can be contacted with the detection pattern provided on the circuit board, and when the contact spring contacts the detection pattern, the circumference of the rotation of the transmission wheel that the detection pattern outputs is output. And a control circuit for inputting a rotational position detection signal for detecting a position in the direction.

Further, the present invention relates to an electronic timepiece having a display wheel, a motor for rotating the display wheel, a rotating member for rotating based on the rotation of the motor to rotate the display wheel, and a rotating member. A rotation detecting means for generating a signal relating to the state of rotation of the display wheel based on the rotation of the display wheel; and a motor driving means for controlling the rotation of the motor based on the rotation signal generated by the rotation detecting means. did.
In the electronic timepiece of the present invention, the rotating member includes an intermediate date wheel that rotates based on the rotation of the motor, and a date wheel that rotates based on the rotation of the intermediate date wheel. The number of the rotating members may be one or more. The display vehicle is a member that displays information on time or calendar, and is, for example, a day indicator or a day indicator.

In the electronic timepiece of the present invention, the rotation detecting means includes a contact spring provided on the rotating member, and a plurality of contact patterns for detecting a rotation state of the rotating member by contacting the contact spring. Is preferred. With this configuration, it is possible to reliably detect the rotation state of the display wheel. Further, the rotation detecting mechanism of such a display wheel is small. Further, in the electronic timepiece according to the present invention, it is preferable that the motor is an ultrasonic motor, and the motor driving means output a drive signal for driving the ultrasonic motor. With this configuration, it is not necessary to provide a large number of reduction gear trains, so that a small electronic timepiece with a display wheel can be realized.

Further, the above motor may be a step motor or an electromagnetic motor.

In the electronic timepiece according to the present invention, the display wheel or the date wheel has internal teeth having the number of teeth corresponding to the displayed content, and the display wheel or the date wheel rotates by engaging with the internal teeth. A date jumper for regulating the position along the direction, the rotating member includes four date feeding pawls for rotating the indicating wheel or date indicator, and one internal tooth of the indicating wheel or the date indicator is displayed. The ultrasonic motor is configured such that the date jumper regulates the position along the rotation direction of the display wheel or the date wheel so as to be located on a straight line passing through the rotation center of the vehicle or the date wheel and the rotation center of the rotating member. Alternatively, in a state where the motor is stopped, it is preferable that two of the four date fingers are positioned symmetrically with the straight line as the axis of symmetry. In the electronic timepiece of the present invention, the date finger can rotate the display wheel or date wheel when it is rotated, and can rotate the date wheel even if the display wheel or date wheel is rotated. It is preferable that it is configured not to be possible.

Further, in the electronic timepiece of the present invention, the engagement between the internal teeth of the date indicator and the date finger and the index torque of the ultrasonic motor or the motor cause the date finger to rotate even when the date wheel is rotated. Preferably, it is configured so that it cannot be rotated. Furthermore, in the electronic timepiece of the present invention,
The date pawl preferably has a locking tooth profile at the tip. With this configuration, it is possible to reduce the index torque of the ultrasonic motor or the motor,
An electronic timepiece that can effectively prevent rotation of the display wheel or date wheel due to impact can be realized.

[0020]

Embodiments of the present invention will be described below with reference to the drawings. (1) First Embodiment In FIGS. 1 and 2, in a first embodiment of the present invention, an ultrasonic motor of an electronic timepiece 100 with a calendar includes an ultrasonic rotor 102. The ultrasonic rotor pinion 102b of the ultrasonic rotor 102 meshes with the date turning intermediate gear 104a of the date turning intermediate wheel 104. The date turning intermediate pinion 104b of the date turning intermediate wheel 104 is the date turning gear 106 of the date turning wheel 106.
meshes with a. A date finger 108 is provided on the date wheel 106 and rotates simultaneously with the rotation of the date wheel 106. As shown in FIG. 1, two date pawls 108 may be provided, or one date pawl 108 may be provided.
More than one may be provided.

The date wheel 11 having 31 date wheel teeth 110a
0 is rotatably incorporated in the main plate 112. "1"
To 31 (not shown) are provided on the display surface 110c of the date indicator 110. A battery 114 is incorporated in the main plate 112 on the side opposite to the side where the date indicator 110 is mounted. The date jumper 116 is the date wheel holding 118
And are formed integrally. Regulation 1 of Jumper 116
16a regulates the date wheel teeth 110a. Day jumper 116
Has a jumper spring portion 116b. In another structure shown in FIG. 3, the ultrasonic rotor shaft 120 is fixed to the main plate 112. An ultrasonic stator 122 is fixed to the ultrasonic rotor shaft 120. A piezoelectric element (not shown) is fixed to the ultrasonic stator 122. Ultrasonic rotor 10
2 is rotatably incorporated in the ultrasonic rotor shaft 120 and is in contact with the displacement expanding comb teeth 122 c of the ultrasonic stator 122. The ultrasonic pressure spring 124 is used for the ultrasonic rotor 102.
Are pressed so as to apply an elastic force to the comb teeth 122c for displacement expansion.

The date dial intermediate wheel 104 is rotatably incorporated between the main plate 112 and the date wheel holder 118. The ultrasonic rotor pinion 102b of the ultrasonic rotor 102 meshes with the date turning intermediate gear 104a of the date turning intermediate wheel 104. The date wheel 106 is rotatably incorporated in the main plate 112. Kana 104b of the middle of the date
It engages with the date gear 106a of the date wheel 106. A date finger 108 is provided on the date wheel 106, and the date wheel 1
By the rotation of 06, it rotates simultaneously. 31 day gear teeth 1
A date indicator 110 having 10 a is rotatably incorporated in a main plate 112. Numerals (not shown) from “1” to “31” are provided on the display surface 110 c of the date indicator 110.
Next, the operation of the electronic timepiece with calendar 100 of the present invention will be described.

Referring to FIG. 4, control circuit 130 has a time signal generating circuit for counting information relating to time and date and generating a date signal, and further, based on a date signal output from the time signal generating circuit. An ultrasonic motor drive circuit for outputting an ultrasonic motor drive signal for rotating the ultrasonic motor. Referring to FIG. 35, two sets of electrode groups 803a and 803 each composed of a plurality of electrodes are provided on one surface of an ultrasonic stator 122 constituting a vibrating body of an ultrasonic motor.
The piezoelectric element 802 on which b is formed is bonded. The oscillation drive circuit 825 controls the electrode groups 803a and 803a of the piezoelectric element 802.
03b. The inverter 812 is connected to the piezoelectric element 8
The role of an inverting power amplifier for inverting and amplifying an electrical signal as excitation information from one surface on which the 02 electrode groups 803a and 803b are formed and the electrode 803c or the ultrasonic stator 122 formed on the other surface. Fulfill. Resistance 813
Are connected in parallel to the inverter 812,
2 is stabilized.

The output terminal of the inverter 812 is a resistor 814
Are connected to input terminals of two sets of buffers 811a and 811b. Two buffers 811a and 811b
Are connected to the electrode group 803 of the piezoelectric element 802.
a and 803b. Capacitor 815
Has one end connected to the input terminal of the inverter 812, and the capacitor 816 has one end connected to the output terminal of the inverter 812 via the resistor 814. Capacitors 815, 8
The other end 16 is grounded and adjusts the phase in the oscillation drive circuit 825. An inverter 812 and a buffer 811a,
Each of the input terminals 811b has a control terminal as well as an input terminal and an output terminal. Depending on a signal input to this control terminal, each of the inverters 811b has a tri-state configuration in which an output terminal can be brought into a high impedance state. is there.

A forward / reverse rotation signal generating means 820 outputs a forward / reverse rotation signal for setting the rotation direction of the ultrasonic motor to the switching circuit 8.
26. The output terminal of the switching circuit 826 is connected to the tri-state buffer 811a of the oscillation driving circuit 825,
811 b and the control terminal of the tri-state inverter 812, respectively.
, One of the tri-state buffers 811a and 811b is made to function as a normal buffer, and the output terminal of the other buffer is disabled in a high impedance state. The ultrasonic stator 122 is driven by a tri-state buffer that functions as a normal buffer selected by the output signal of the switching circuit 826. The ultrasonic stator 122 is driven only by a tri-state buffer permitted to function as a normal buffer by the switching circuit 826, and a tri-state buffer permitted to function as a normal buffer by the switching circuit 826. When replaced, the rotational direction of the ultrasonic motor is reversed.

The output signal from the switching circuit 826 output based on the output from the forward / reverse signal generating means 820 allows the tri-state inverter to bring the output terminal into a high impedance state, and When the inverter is disabled, both tri-state buffers 811a, 811b are disabled and the ultrasonic motor can be stopped. Referring to FIGS. 36 and 37, a disk-shaped piezoelectric element 802 is bonded to the plane of the disk-shaped ultrasonic stator 122 by bonding or a thin film forming method. The ultrasonic waves excite standing waves of two wavelengths in the circumferential direction of the ultrasonic stator 122 to drive the ultrasonic rotor to rotate. Piezoelectric element 802
Are formed on one of the planes so as to form a first electrode group 803a and a second electrode group 803b every other eight divided electrodes that are four times the wave number in the circumferential direction. As shown in FIG. 36 and FIG. 37, polarization processing (+) and (−) has been performed.

The first electrode group 803a includes electrodes a1, a2,
a3, a4, and each electrode is connected to the first connection means 814.
a is short-circuited. The second electrode group 803b includes electrodes b1, b
2, b3 and b4, and each electrode is connected to the second connection means 8
Short-circuited at 14b. In the drawing, (+) and (-) indicate the directions of the polarization processing, and the polarization processing is performed by applying a positive electric field and a negative electric field to the bonding surface side of the piezoelectric element 802 with the ultrasonic stator 122, respectively. Things. Protrusions (comb teeth) 817 for expanding the displacement of the ultrasonic stator and transmitting the driving force from the ultrasonic stator to the ultrasonic rotor are provided on the surface of the ultrasonic stator 122 at every other position near the boundary between the electrodes. Is provided. The high frequency voltage generated by the oscillation driving circuit 825 is applied to one of the electrode groups 803a and 803b to drive the ultrasonic stator 122. The rotation direction of the ultrasonic motor is switched depending on which electrode group drives the ultrasonic stator 122.

The ultrasonic motor used in the electronic timepiece with calendar according to the present invention is preferably driven by the above-described drive circuit, piezoelectric element and ultrasonic stator.
It can be driven by another configuration. Control circuit 13
0 outputs the ultrasonic motor drive signal to the ultrasonic motor (USM) 132 when the count result is midnight. That is, the control circuit 130 executes the date indicator 1 once a day.
It is configured to output an ultrasonic motor drive signal for rotating 10 by 360 ° / 31, that is, 1/31 rotation. The control circuit 130 outputs “year”, “month”,
"Day" and time are counted. When the count result of the control circuit 130 outputs midnight on a normal day, the ultrasonic motor drive signal corresponding to the normal day is output to the ultrasonic motor (US).
M) 132. That is, the control circuit 130
Once a day, it is configured to output an ultrasonic motor drive signal for rotating the date wheel 110 by 360 ° / 31, that is, 1/31 rotation.

Further, when the count result of the control circuit 130 outputs March 1 of a year that is not a leap year, for example, midnight of March 1, 1997, the control circuit 130 Ultrasonic motor (USM) 1
32. That is, the control circuit 130
10 by (360 ° / 31) × 4, that is, 4/3
It is configured to output an ultrasonic motor drive signal for rotating by one rotation. Therefore, the information on the date displayed by the date indicator 110 is “2” corresponding to February 28.
The display changes from "8" to "1" corresponding to March 1 without displaying "29", "30" and "31". Also, the counting result of the control circuit 130 is March 1 of the leap year.
When the day, for example, midnight on March 1, 2000, is output, the control circuit 130 outputs an ultrasonic motor drive signal corresponding to March 1 of the leap year to the ultrasonic motor (USM) 132. That is, the control circuit 130 is configured to output an ultrasonic motor drive signal for rotating the date wheel 110 by (360 ° / 31) × 3, that is, by 3/31 rotation. Therefore, the date indicated by the date indicator 110
The information related to is, from the display of “29” corresponding to February 29, without displaying “30” and “31”,
The display changes to “1” corresponding to March 1.

Similarly, when the counting result of the control circuit 130 outputs the last day of the month of the "small month", that is, the day following the "30th day", for example, midnight of May 1, the control circuit 130 outputs 130
Outputs an ultrasonic motor drive signal corresponding to May 1 to the ultrasonic motor (USM) 132. That is, the control circuit 130 sets the date indicator 110 by (360 ° / 31) × 2,
That is, it is configured to output an ultrasonic motor drive signal for rotating by 2/31 rotation. Therefore, the information on the “date” displayed by the date indicator 110 is “April 30”.
The display changes from “30” corresponding to the day to “1” corresponding to May 1 without displaying “31”. Such a configuration can be similarly applied to other embodiments of the present invention.

With the configuration described above, the electronic timepiece with calendar of the present invention constitutes a so-called "auto calendar clock" or "perpetual calendar clock". The ultrasonic motor (USM) 132 has an ultrasonic stator to which a piezoelectric element is joined, and receives an ultrasonic motor drive signal,
An ultrasonic rotor is frictionally driven by vibration waves generated in the ultrasonic stator due to expansion and contraction of the piezoelectric element. At least two electrode groups each including a plurality of electrodes are formed on the surface of the piezoelectric element. The control circuit 130 has at least two power amplifiers, and the output terminals of these power amplifiers are respectively connected to two sets of electrodes of the piezoelectric element, and each of the electrodes is independently driven to excite. The ultrasonic rotor of the ultrasonic motor (USM) 132 rotates when the electrode group of the piezoelectric element inputs an ultrasonic motor drive signal. The rotation of the ultrasonic rotor causes the intermediate wheel, that is, the date intermediate wheel 104, to rotate. The rotation of the date dial intermediate wheel 104 causes the date finger 108 to rotate, and the date finger 108 rotates the date wheel 110.

The calendar-equipped electronic timepiece according to the present invention may include a calendar display wheel for displaying other information relating to the calendar, for example, "year", "month", "day of the week", "six days" and the like. . For example, in a configuration having a day wheel indicating “day”, a day wheel (not shown) having 28 day wheel teeth (not shown) is rotatably incorporated in the main plate 112. "Mon", "MON", "Tue", "TUE",
"Wed", "WED", "Thu", "THU", "Fri",
"FRI", "Sat", "SAT", "Sun", "SUN"
Are provided on the display surface of the day indicator. The control circuit 130 has a time signal generation circuit that counts information on the time and the day of the week and generates a day signal, and further, based on the day signal output from the time signal generation circuit,
An ultrasonic motor drive circuit that outputs an ultrasonic motor drive signal for rotating the ultrasonic motor is provided.

The control circuit 130 outputs an ultrasonic motor drive signal to the ultrasonic motor (USM) 132 when the counting result outputs midnight. That is, the control circuit 13
0 is configured to output an ultrasonic motor drive signal for rotating the day wheel by 360 ° / 14, that is, 1/14 rotation once a day. Therefore, if the Japanese day of the week is set first, or the English day of the week is set, the day of the week can be displayed in Japanese or English as required by the day wheel. Further, for example, in a configuration having a month wheel displaying “month”, a month wheel (not shown) having 36 month gear teeth (not shown) is rotatably incorporated in the main plate 112. 1 from "1" to "12"
Three sets of two kinds of numbers are provided on the display surface of the month wheel in order. That is, a total of 36 numbers, such as 1 to 12, 1 to 12, and 1 to 12, are provided on the display surface of the month wheel.

The control circuit 130 has a time signal generating circuit which counts information on time and month to generate a month signal, and further controls the ultrasonic motor based on the month signal output from the time signal generating circuit. It has an ultrasonic motor drive circuit that outputs an ultrasonic motor drive signal for rotating. When the counting result outputs the first day of every month, the control circuit 130
Ultrasonic motor (USM) 132
Output to That is, the control circuit 130 is configured to output an ultrasonic motor drive signal for rotating the month wheel by 360 ° / 36, that is, 1/36 rotation on the first day of every month. Therefore, the month can be displayed by the month wheel. "Year", "Six days", etc. can be displayed by the same configuration.

(2) Second Embodiment Referring to FIGS. 5 and 6, according to a second embodiment of the present invention, the structure of the ultrasonic motor of the electronic timepiece with calendar 200 is the same as that shown in FIG. The structure is the same as that of the ultrasonic motor of the electronic timepiece with calendar 100 according to the first embodiment of the invention. The date wheel 106 is rotatably incorporated in the main plate 112. Kana 10 of the ultrasonic rotor 102
2b meshes with the date gear 106a of the date wheel 106. A date finger 108 is provided on the date wheel 106 and rotates simultaneously with the rotation of the date wheel 106. A date wheel 110 having 31 date wheel teeth 110 a is rotatably incorporated in a main plate 112. Numerals (not shown) from “1” to “31” are provided on the display surface 110 c of the date indicator 110.

The electronic timepiece with calendar 200 has a date jumper (not shown). The regulation unit of the date jumper regulates the date wheel teeth 110a. Next, the operation of the electronic timepiece with calendar 200 of the present invention will be described. Referring to FIG. 5, the control circuit 130 includes a time signal generation circuit that counts information on time and date and generates a date signal.
Further, there is provided an ultrasonic motor driving circuit for outputting an ultrasonic motor driving signal for rotating the ultrasonic motor (USM) 132 based on a date signal output from the time signal generating circuit. The control circuit 130 outputs an ultrasonic motor drive signal to the ultrasonic motor (USM) 132 when the counting result outputs midnight. That is, the control circuit 13
0 means once a day, the date indicator 110 by 360 ° / 31,
That is, it is configured to output an ultrasonic motor drive signal for rotating by 1/31 rotation.

The ultrasonic rotor of the ultrasonic motor (USM) 132 rotates when the electrode group of the piezoelectric element inputs an ultrasonic motor drive signal. The rotation of the ultrasonic rotor causes the date finger 108 to rotate, and the date finger 108 rotates the date indicator 110. (3) Third Embodiment Referring to FIGS. 7 and 8, according to a third embodiment of the present invention, the structure of the ultrasonic motor of the electronic timepiece 300 with calendar is the same as that of the third embodiment shown in FIG. Ultrasonic motor (USM) 132 of calendar electronic timepiece 100 according to one embodiment
It is the same as the structure of FIG. A date wheel 110 is rotatably incorporated in the main plate 112. The ultrasonic rotor pinion 102b of the ultrasonic rotor 102 meshes with the date wheel tooth 110a.
Numerals (not shown) from “1” to “31” are provided on the display surface 110 c of the date indicator 110.

The electronic timepiece with calendar 300 has a date jumper (not shown). The regulation unit of the date jumper regulates the date wheel teeth 110a.

Next, an electronic timepiece 300 with a calendar according to the present invention.
The operation of will be described. Referring to FIG. 7, the control circuit 130 has a time signal generation circuit that counts information on time and date and generates a date signal. Further, based on the date signal output from the time signal generation circuit, An ultrasonic motor drive circuit that outputs an ultrasonic motor drive signal for rotating the ultrasonic motor (USM) 132 is provided. When the count result is output at midnight, the control circuit 130
Ultrasonic motor (USM) 132
Output to That is, the control circuit 130 operates once a day.
Times, the date wheel 110 is shifted by 360 ° / 31, that is, 1 /
It is configured to output an ultrasonic motor drive signal for rotating by 31 rotations. Ultrasonic motor (USM) 13
The second ultrasonic rotor rotates when the electrode group of the piezoelectric element inputs an ultrasonic motor drive signal. The date wheel 110 is rotated by the rotation of the ultrasonic rotor.

(4) Fourth Embodiment Referring to FIGS. 9 and 10, in a fourth embodiment of the present invention, an ultrasonic rotor shaft 120 of an electronic timepiece 400 with a calendar is used.
Are fixed to the main plate 112. Ultrasonic stator (US
M stator) 122 is fixed to the ultrasonic rotor shaft 120. The piezoelectric element (not shown) is an ultrasonic stator 122
It is stuck to. The date indicator 110 is an ultrasonic stator 122
Is in contact with the comb teeth 122c for displacement enlargement. That is, the date indicator 110 constitutes the ultrasonic rotor 102. The ultrasonic pressure spring 124 causes the date indicator 110 to displace the comb teeth 12
2c is pressed to apply elastic force. The calendar-equipped electronic timepiece 400 includes a date jumper (not shown). The regulation unit of the date jumper regulates the date wheel teeth 110a.

Next, an electronic timepiece 400 with a calendar according to the present invention.
The operation of will be described. Referring to FIG. 9, the control circuit 130 has a time signal generation circuit that counts information on time and date and generates a date signal. An ultrasonic motor drive circuit that outputs an ultrasonic motor drive signal for rotating the ultrasonic motor is provided. The control circuit 130 outputs an ultrasonic motor drive signal to the ultrasonic motor (USM) 132 when the counting result outputs midnight. That is, the control circuit 130 sets the date indicator 110 three times a day.
It is configured to output an ultrasonic motor drive signal for rotating only 60 ° / 31, that is, 1/31 rotation. The ultrasonic motor (USM) has an ultrasonic stator 122 to which a piezoelectric element is joined. The date indicator 110 is frictionally driven by a vibration signal generated in the ultrasonic stator by the expansion and contraction of the piezoelectric element when the piezoelectric element receives an ultrasonic motor drive signal. (5) Fifth Embodiment Referring to FIGS. 11 to 13, in a fifth embodiment of the present invention, a calendar-equipped electronic timepiece 500 includes a front train wheel 530.
24h for detecting the rotational position of the front train wheel 530
A contact 532 is provided. The 24-hour wheel 550 has a 24-hour contact spring 552. The 24-hour contact spring 552 has two 24-hour contact spring terminals 552a and 552b.

The circuit block 534 is provided with a 24 hour contact spring terminal pattern (not shown) corresponding to a part of a circumferential portion along a rotating locus of the tip of the 24:00 contact spring terminals 552a and 552b. Have been. The 24-hour contact spring 552 is arranged so as to be able to contact a 24-hour contact spring terminal pattern (not shown) of the circuit block 534.
The 24-hour wheel 550 meshes with the hour wheel 554 and rotates once a day. The hour wheel 554 rotates once every 12 hours, and the hour wheel 554
"Hour" is indicated by an hour hand (not shown) attached to the. The date wheel 106 is rotatably incorporated in the main plate 112. The date driving wheel 106 forms a date feed reduction gear train 560. The ultrasonic rotor pinion 102b of the ultrasonic rotor 102 of the ultrasonic motor 132 meshes with the date gear 106a of the date driving wheel 106. The ultrasonic motor 132 including the ultrasonic rotor 102 constitutes the date feed motor 562.

A date finger 108 is provided on the date wheel 106 and rotates simultaneously with the rotation of the date wheel 106.
The date wheel 110 having 31 date wheel teeth 110a is the main plate 11
2 so as to be rotatable. "1" to "31"
(Not shown) are provided on the display surface 110c of the date indicator 110. The date indicator holder 118 rotatably supports the date indicator 110. The electronic timepiece with calendar 500 includes a date jumper 116. Regulatory part 116 of day jumper 116
a defines the date wheel tooth 110a. The date wheel 106 has a date wheel contact spring 556. Date wheel contact spring 556
Are two date wheel contact spring terminals 556a and 556b
Having. The circuit block 534 is provided with a date wheel contact spring terminal pattern (not shown) corresponding to a part of a circumferential portion along a rotating locus of the tip of the date wheel contact spring terminals 556a and 556b. ing. The date wheel contact spring 556 is arranged so as to be able to contact a date wheel contact spring terminal pattern (not shown) of the circuit block 534. The date wheel contact spring 556 forms a date feed contact 564.

Next, an electronic timepiece 500 with a calendar according to the present invention.
The operation of will be described. When the count result of the control circuit outputs midnight, the 24:00 contact spring 552 comes into contact with a first pattern (not shown) of the circuit block 534. At this time, the circuit block 534 rotates the ultrasonic rotor 102 of the ultrasonic motor 132 according to the detection signal output from the 24-hour contact spring 552. The rotation of the ultrasonic rotor 102 causes the date indicator wheel 106 to rotate, and the date finger 108 causes the date indicator 110 to rotate. Thereby, the display of the date can be changed. The date indicator 110 is 360 ° / 31,
That is, when rotated by 1/31 turn, the date wheel contact spring 556 comes into contact with the second pattern (not shown) of the circuit block 534. At this time, the date wheel contact spring 556
, The circuit block 534 stops the rotation of the ultrasonic rotor 102 of the ultrasonic motor 132.

Next, the 24-hour contact spring 552 is separated from the first pattern of the circuit block 534, and
56 moves away from the second pattern of the circuit block 534.
This state is maintained until the next day, when the count result of the control circuit returns to midnight again. Note that the start or end time of day feeding does not necessarily have to be exactly midnight, and may be a time before midnight or a time after midnight. With such a configuration, the date feeding can be started accurately at the same time every day, and the position of the date indicator can be accurately maintained. As a result, in the electronic timepiece with calendar of the present invention, the position of the date character of the date indicator is hardly shifted. (6) Detailed structure of the contact portion and description of its operation Next, the position of the transmission wheel included in the train wheel such as the front wheel train or the calendar wheel train of the electronic timepiece of the present invention is detected along the rotational direction. The detailed structure of the contact portion of the transmission wheel rotational position detecting device will be described.

(6-1) First Structure of Contact Part Referring to FIGS. 21 and 22, a transmission wheel 620 is rotatably incorporated in an electronic timepiece. The transmission wheel 620 is a component included in a wheel train such as a front wheel train or a calendar wheel train of an electronic timepiece. The transmission wheel 620 is, for example, an hour wheel, a 24-hour vehicle,
It is a date driving car, a date driving intermediate car, and the like. A contact spring 622 is fixed to the transmission wheel 620. The contact spring 622 is configured to have conductivity. For example, the contact spring 622 may be made of a metal such as stainless steel, or gold plating may be attached to the surface of the contact spring 622. Two contact spring terminals 622a and 622b are provided on the contact spring 622. A terminal contact portion 622c is provided at the tip of the contact spring terminal 622a, and the terminal contact portion 622c is provided.
d is provided at the tip of the contact spring terminal 622a.

The circuit board 624 is incorporated in the electronic timepiece,
The A pattern 626 and the B pattern 628 are
4 is provided on the surface. The A pattern 626 and the B pattern 628 are connected to a control circuit (not shown). When the A pattern 626 and the B pattern 628 conduct, a rotational position detection signal is input to a control circuit (not shown).

The contact spring 622 extends substantially linearly through the rotation center 630 of the transmission wheel 620. A pattern 6
26 and the B pattern 628 are arranged so as to make an angle of about 180 ° with the rotation center 630 of the transmission wheel 620. Therefore, when the transmission wheel 620 rotates, a state occurs in which the terminal contact portion 622c contacts the A pattern 626 and the terminal contact portion 622d contacts the B pattern 628. At this time, a rotation position detection signal is input to a control circuit (not shown). When the transmission wheel 620 further rotates, the terminal contact portion 622c separates from the A pattern 626, and
The terminal contact portion 622d is separated from the B pattern 628. At this time, no rotation position detection signal is generated. Further, when the transmission wheel 620 rotates, a state occurs in which the terminal contact portion 622c contacts the B pattern 628 and the terminal contact portion 622d contacts the A pattern 626. At this time, the rotational position detection signal is again input to the control circuit (not shown).
When the transmission wheel 620 further rotates, the terminal contact portion 622c separates from the B pattern 628 and the terminal contact portion 622d
Moves away from the A pattern 626. At this time, no rotation position detection signal is generated.

Whether the transmission wheel 620 rotates clockwise or counterclockwise, the operation of the contact portion is the same.

In this configuration, when the transmission wheel 620 makes one rotation, a rotation position detection signal is input to a control circuit (not shown) twice. Therefore, when the transmission wheel 620 is configured to make one rotation in 24 hours, a rotation position detection signal is input to a control circuit (not shown) every 12 hours. When it is necessary to count 24 hours as in the case of changing the date display, a control circuit is provided in the control circuit for counting the number of times the rotation position detection signal is generated, and when the rotation position detection signal is input twice. , So as to output a signal for changing the date display. As shown in FIG. 23, the terminal contact portion 622
c rotates with respect to the A pattern 626 around the rotation center 630 of the transmission wheel 620 in the direction of the arrow 632. Therefore, when not in contact with the pattern, the terminal contact portion 622c contacts the surface 624a of the circuit board 624 and rotates. This configuration and operation are the same for the terminal contact portion 622d.

With this structure, the rotational position of the transmission wheel can be detected with a simple pattern arrangement.

(6-2) Second Structure of Contact Part Referring to FIG. 24, similarly to the first structure of the contact part described above, the transmission wheel 620 is rotatably incorporated in the electronic timepiece, and the contact spring 622 Are fixed to the transmission wheel 620.
The configuration of the contact spring 622 is similar to the first structure of the contact portion. A circuit board 624 is incorporated in an electronic timepiece, and an A pattern 626 and a B pattern 628 are provided on the surface of the circuit board 624. The A pattern 626 and the B pattern 628 are connected to a control circuit (not shown). When the A pattern 626 and the B pattern 628 conduct, a rotational position detection signal is input to a control circuit (not shown).

The A pattern 626 is formed at a relatively small opening angle of, for example, about 30 ° with respect to the rotation center 630 of the transmission wheel 620. The B pattern 628 is, for example, approximately 320 degrees with respect to the rotation center 630 of the transmission wheel 620.
It is formed with a relatively large opening angle of °. Therefore, when the transmission wheel 620 rotates, a state occurs in which the terminal contact portion 622c contacts the A pattern 626 and the terminal contact portion 622d contacts the B pattern 628. At this time, a rotation position detection signal is input to a control circuit (not shown). When the transmission wheel 620 further rotates, the terminal contact portion 622c separates from the A pattern 626 and contacts the B pattern 628, and the terminal contact portion 622d also contacts the B pattern 628. At this time, no rotation position detection signal is generated. Furthermore,
When the transmission wheel 620 rotates, the terminal contact portion 622c contacts the B pattern 628, and the terminal contact portion 622d contacts the B pattern 628.
A condition occurs that contacts the pattern 626. At this time, the rotational position detection signal is again input to the control circuit (not shown). When the transmission wheel 620 further rotates, the terminal contact portion 62
2c is in contact with the B pattern 628 and the terminal contact portion 6
22d separates from the A pattern 626 and the B pattern 628
Contact At this time, no rotation position detection signal is generated.

In this configuration, when the transmission wheel 620 makes one rotation, a rotation position detection signal is input to a control circuit (not shown) once. Therefore, when the transmission wheel 620 is configured to make one rotation in 24 hours, a rotation position detection signal is input to a control circuit (not shown) every 24 hours. When it is necessary to count 24 hours, such as when changing the date display, a detection circuit for detecting the generation of the rotation position detection signal is provided in the control circuit, and when the rotation position detection signal is input, the date display is performed. Is configured to output a signal for changing. Whether the transmission wheel 620 rotates clockwise or counterclockwise, the operation of the contact portion is the same. As shown in FIG. 25, the terminal contact portion 622
c rotates with respect to the A pattern 626 around the rotation center 630 of the transmission wheel 620 in the direction of the arrow 632. Therefore, when the circumferential gap between the A pattern 626 and the B pattern 628 is smaller than the size of the terminal contact portion 622c, the terminal contact portion 622c becomes the A pattern 626.
Contact state, only the B pattern 628, or the A pattern 626 and the B pattern 628 at the same time.
c does not contact the surface 624a of the circuit board 624. This configuration and operation are the same for the terminal contact portion 622d.

With this structure, the surface 6 of the circuit board 624 is
There is no danger of the 24a being scraped off, and the risk of scraping or peeling off at the edges of the A pattern 626 and the B pattern 628 is reduced. As shown in FIG. 26, when the circumferential gap between the A pattern 626 and the B pattern 628 is close to the size of the terminal contact portion 622c, the terminal contact portion 622c is There is a possibility of contact. Therefore, A pattern 626 and B pattern
The circumferential gap between the pattern 628 and the pattern 628 is preferably small.

(6-3) Third Structure of Contact Part Referring to FIG. 27, an A pattern 626, a B pattern 628, a C pattern 640 and a D pattern 642 are provided on the surface of the circuit board 624. A pattern 62
6 and the B pattern 628 are connected to a control circuit (not shown). The C pattern 640 and the D pattern 642 are not connected to the control circuit, have no special function,
This is a so-called “dummy pattern”. A pattern 62
When the pattern 6 and the B pattern 628 conduct, a rotation position detection signal is input to a control circuit (not shown). Contact spring 6
Reference numeral 22 extends substantially linearly through the rotation center 630 of the transmission wheel 620. A pattern 626 and B pattern 62
8 is approximately 18 with respect to the rotation center 630 of the transmission wheel 620.
They are arranged at an angle of 0 °. Therefore, when the transmission wheel 620 rotates, a state occurs in which the terminal contact portion 622c contacts the A pattern 626 and the terminal contact portion 622d contacts the B pattern 628. At this time, a rotation position detection signal is input to a control circuit (not shown). When the transmission wheel 620 further rotates clockwise, the terminal contact portion 622c separates from the A pattern 626 and moves to
40, and the terminal contact portion 622d separates from the B pattern 628 and contacts the D pattern 642. At this time, no rotation position detection signal is generated.

Further, when the transmission wheel 620 rotates clockwise, a state occurs in which the terminal contact portion 622c contacts the B pattern 628 and the terminal contact portion 622d contacts the A pattern 626. At this time, the rotational position detection signal is again input to the control circuit (not shown). Transmission wheel 62
When 0 further rotates clockwise, the terminal contact 62
2c is separated from the B pattern 628 and contacts the D pattern 642, and the terminal contact portion 622d is connected to the A pattern 626.
And comes into contact with the C pattern 640. At this time, no rotation position detection signal is generated.

In this configuration, when the transmission wheel 620 makes one rotation, a rotation position detection signal is input to a control circuit (not shown) twice. Therefore, when the transmission wheel 620 is configured to make one rotation in 24 hours, a rotation position detection signal is input to a control circuit (not shown) every 12 hours. When it is necessary to count 24 hours as in the case of changing the date display, a control circuit is provided in the control circuit for counting the number of times the rotation position detection signal is generated, and when the rotation position detection signal is input twice. , So as to output a signal for changing the date display. Whether the transmission wheel 620 rotates clockwise or counterclockwise, the operation of the contact portion is the same. With this structure, the rotation position of the transmission wheel can be detected with a simple pattern arrangement.

(6-4) Fourth Structure of Contact Part Referring to FIG. 28, an A pattern 652, a B pattern 654, and a VDD pattern 65 are formed on the surface of the circuit board 624.
6 are provided. The A pattern 652 and the B pattern 654 are connected to a control circuit (not shown). VD
The D pattern 656 may be directly connected to the positive power supply (VDD), or may be connected to a control circuit (not shown), and may be connected to the positive power supply (VDD) in the control circuit. When the A pattern 652 is turned on to the plus (VDD) of the power supply, an A pattern detection signal, which is a first detection signal, is input to a control circuit (not shown). That is,
In this case, the A pattern input terminal of the control circuit is "1",
That is, it becomes “HIGH”.

The B pattern 654 is connected to the power supply plus (VD
When conducted to D), a B pattern detection signal, which is a second detection signal, is input to a control circuit (not shown). That is, in this case, the B pattern input terminal of the control circuit becomes "1", that is, "HIGH".

Referring to FIG. 30, each pattern will be described sequentially in the clockwise direction. The A pattern 652 is provided at an opening angle of about 30 ° with respect to the rotation center 630 of the transmission wheel. The A pattern 652 has a first end 6 in the circumferential direction.
52a and a second end 652b. The VDD pattern 656 has a first pattern portion 656s and a second pattern portion 656t. The first pattern portion 656s of the VDD pattern 656 is formed in the circumferential direction with a first end 656a.
And a second end 656b. VDD pattern 65
The first end 656a of No. 6 is adjacent to the first end 652a of the A pattern 652 with a gap. The first pattern portion 656s of the VDD pattern 656 is provided at an opening angle of approximately 60 ° with respect to the rotation center 630 of the transmission wheel.

The B pattern 654 has a first end 654a and a second end 654b in the circumferential direction. The first end 654a of the B pattern 654 is connected to the VDD pattern 656.
And a second end 656b of the first pattern portion 656s. The B pattern 654 is provided at an opening angle of about 30 ° with respect to the rotation center 630 of the transmission wheel. The second end 654b of the B pattern 654 is
It is adjacent to the first end 656c of the second pattern portion 656t of the D pattern 656 with a gap. The second pattern portion 656t of the VDD pattern 656 is provided at an opening angle of approximately 240 ° with respect to the rotation center 630 of the transmission wheel. The second end 656d of the second pattern portion 656t of the VDD pattern 656 is adjacent to the second end 652b of the A pattern 652 with a gap.

As described above, on the surface of the circuit board 624, the A pattern 652 and the first pattern portion 656s of the VDD pattern 656 are sequentially arranged in the clockwise direction around the rotation center 630 of the transmission wheel. Pattern 65
4. Second pattern portion 656t of VDD pattern 656
Is provided. Referring to FIG. 29, the contact spring 66
2 is an extension 3 extending outward from the rotation center 630 of the transmission wheel 620.
It has two contact spring terminals 662a, 662b and 662c. Contact spring terminals 662a and 662b are approximately 75 °
At an angle. Contact spring terminal 662a
And 662c are provided at an angle of approximately 142.5 °. The contact spring terminals 662b and 662c are approximately 1
It is provided to form an angle of 42.5 °.

The terminal contact portion 662d is a contact spring terminal 662
a, and a terminal contact portion 662e is provided at a distal end of the contact spring terminal 662b, and a terminal contact portion 662f is provided at the distal end of the contact spring terminal 662b.
Is provided at the tip of the contact spring terminal 662c. When the transmission wheel 620 rotates, the terminal contact portions 662a, 662b,
Reference numeral 662c denotes an A pattern 652, a first pattern portion 656s of the VDD pattern 656, and a B pattern 652, respectively.
4. Second pattern portion 656t of VDD pattern 656
It is configured to contact. Next, the operation of detecting the rotation direction when the transmission wheel rotates clockwise, that is, the forward rotation, and detecting the rotation start state will be described.

(F1) Operating state 1: FIG. 31 shows the initial state of the transmission wheel, that is, operating state 1 in which the terminal contact portion 662d of the contact spring 662 is at the start position 670.
Is shown. This state 1 is set to “0 °” in the timing chart of FIG. In the operation state 1 shown in FIG. 31, the terminal contact portion 662d contacts the second pattern portion 656t of the VDD pattern 656, and the terminal contact portion 662e becomes VDD.
Touching the first pattern portion 656s of the pattern 656,
The terminal contact portion 662f is in contact with the second pattern portion 656t of the VDD pattern 656. In this operation state 1, neither the A pattern detection signal nor the B pattern detection signal is input to the control circuit (not shown). That is, in this operation state 1, the A pattern input terminal and the B pattern input terminal of the control circuit are both “0”, that is, “LOW”.

(F2) Operating state 2: Next, the contact spring 6
In the operating state 2 in which the terminal contact portion 662d of 62 rotates clockwise from the start position 670 to a position of about 15 °, the terminal contact portion 662d contacts the A pattern 652,
The terminal contact part 662e contacts the first pattern portion 656s of the VDD pattern 656, and the terminal contact part 662f
It is in contact with the second pattern portion 656t of the D pattern 656. In this operation state 2, only the A pattern detection signal is input to the control circuit (not shown). In other words, in this operation state 2, the A pattern input terminal of the control circuit becomes “1”, that is, “HIGH”, and the B pattern input terminal remains “0”, that is, “LOW”.

(F3) Operating state 3: Next, the contact spring 6
In the operating state 3 in which the terminal contact portion 662d of 62 rotates clockwise from the start position 670 to a position of about 30 °, the terminal contact portion 662d contacts the A pattern 652,
The terminal contact portion 662e contacts the B pattern 654, and the terminal contact portion 662f contacts the second pattern portion 656t of the VDD pattern 656. In this operating state 3, A
The pattern detection signal and the B pattern detection signal are input to a control circuit (not shown). That is, this operation state 3
Then, the A pattern input terminal of the control circuit becomes “1”, that is, “HIGH”, and the B pattern input terminal also becomes “1”, that is, “HIGH”.

(F4) Operating state 4: Next, the contact spring 6
In the operation state 4 in which the terminal contact portion 662d of the 62 rotates clockwise from the start position 670 to a position of about 45 °, the terminal contact portion 662d is the first of the VDD pattern 656.
The contact portion 662e contacts the pattern portion 656s, the terminal contact portion 662e contacts the B pattern 654, and the terminal contact portion 662f
It is in contact with the second pattern portion 656t of the D pattern 656. In this operation state 4, only the B pattern detection signal is input to the control circuit (not shown). That is, in this operation state 4, the A pattern input terminal of the control circuit is “0”, that is, “LOW”, and the B pattern input terminal remains “1”, that is, “HIGH”.

Therefore, as shown in FIG. 32, the state where both the A-pattern input terminal and the B-pattern input terminal of the control circuit are "1" continues for about one hour. This is because when the transmission wheel is configured to make one rotation in 24 hours, it takes about one hour for the transmission wheel to rotate 15 °.

(F5) Operating state 5: Next, contact spring 6
In the operating state 5 in which the terminal contact portion 662d of the 62 rotates clockwise from the start position 670 to a position of about 60 °, the terminal contact portion 662d is the first of the VDD pattern 656.
The contact portion 662e contacts the pattern portion 656s, the terminal contact portion 662e contacts the second pattern portion 656t of the VDD pattern 656, and the terminal contact portion 662f contacts the second pattern portion 656t of the VDD pattern 656. In this operation state 5, neither the A pattern detection signal nor the B pattern detection signal is input to the control circuit (not shown). That is, in this operation state 5, the A pattern input terminal and the B pattern input terminal of the control circuit are both “0”, that is, “LOW”.

(F6) Operating state 6: Next, contact spring 6
Operation state 6 in which the terminal contact portion 662d of 62 rotates clockwise from the start position 670 to a position of about 105 °
Then, the terminal contact portion 662d is in contact with the B pattern 654, and the terminal contact portion 662e is in the second position of the VDD pattern 656.
The terminal contact portion 662f contacts the pattern portion 656t and the second pattern portion 656t of the VDD pattern 656. In this operation state 6, only the B pattern detection signal is input to the control circuit (not shown). That is,
In this operation state 6, the A pattern input terminal of the control circuit remains “0”, and the B pattern input terminal becomes “1”, that is, “HIGH”.

(F7) Operating state 7: Next, contact spring 6
Operation state 7 in which the terminal contact portion 662d of 62 rotates clockwise from the start position 670 to a position about 135 °
Then, the terminal contact portion 662d contacts the second pattern portion 656t of the VDD pattern 656, and the terminal contact portion 662e.
Is in contact with the second pattern portion 656t of the VDD pattern 656, and the terminal contact portion 662f is in contact with the second pattern portion 656t of the VDD pattern 656. In this operation state 7, neither the A pattern detection signal nor the B pattern detection signal is input to the control circuit (not shown). That is, in this operation state 7, the A pattern input terminal and the B pattern input terminal of the control circuit are both "0", that is, "LOW".

(F8) Operating state 8: Next, the contact spring 6
In the operating state 8 in which the terminal contact portion 662d of 62 rotates clockwise from the start position 670 to a position of about 157.5 °, the terminal contact portion 662d has the VDD pattern 656.
Contact the second pattern portion 656 t of the terminal contact portion 66.
2e is the second pattern portion 656 of the VDD pattern 656
and the terminal contact portion 662f contacts the A pattern 652. In this operation state 8, only the A pattern detection signal is input to the control circuit (not shown). That is, in this operation state 8, the A pattern input terminal of the control circuit becomes “1”, that is, “HIGH”, and the B pattern input terminal remains “0”, that is, “LOW”.

(F9) Operating state 9: Next, the contact spring 6
In the operating state 9 in which the terminal contact portions 662d of 62 are rotated clockwise from the start position 670 to a position of about 187.5 °, the terminal contact portions 662d have the VDD pattern 656.
Contact the second pattern portion 656 t of the terminal contact portion 66.
2e is the second pattern portion 656 of the VDD pattern 656
t, and the terminal contact portion 662f is connected to the VDD pattern 65.
6 is in contact with the first pattern portion 656s. In this operation state 9, neither the A pattern detection signal nor the B pattern detection signal is input to the control circuit (not shown). That is, in this operation state 9, the A pattern input terminal and the B pattern input terminal of the control circuit are both “0”, that is, “LOW”.

(F10) Operating state 10: Next, in the operating state 10 in which the terminal contact portion 662d of the contact spring 662 rotates clockwise from the start position 670 to a position of about 247.5 °, the terminal contact portion 662d is The terminal contact portion 662e contacts the second pattern portion 656t of the VDD pattern 656, and the terminal contact portion 662f contacts the second pattern portion 656t of the VDD pattern 656.
54. In this operation state 10, only the B pattern detection signal is input to the control circuit (not shown).
That is, in this operation state 10, the A pattern input terminal of the control circuit remains "0", and the B pattern input terminal becomes "1", that is, "HIGH".

(F11) Operating state 11: Next, in the operating state 11 in which the terminal contact portion 662d of the contact spring 662 rotates clockwise from the start position 670 to a position of about 277.5 °, the terminal contact portion 662d is The terminal contact portion 662e contacts the second pattern portion 656t of the VDD pattern 656, and the terminal contact portion 662f contacts the second pattern portion 656t of the VDD pattern 656. .
In this operation state 11, neither the A pattern detection signal nor the B pattern detection signal is input to the control circuit (not shown). That is, in this operation state 11, the A pattern input terminal and the B pattern input terminal of the control circuit are both "0", that is, "LOW".

(F12) Operating state 12: Next, in the operating state 12 in which the terminal contact portion 662d of the contact spring 662 rotates clockwise from the start position 670 to a position of about 300 °, the terminal contact portion 662d has the VDD pattern. 65
6 comes into contact with the second pattern portion 656t of the terminal contact portion 6t.
62e contacts the A pattern 652, and the terminal contact portion 662
f is in contact with the A pattern 652. This operation state 1
At 2, only the A-pattern detection signal is input to a control circuit (not shown). That is, in this operation state 12,
The A pattern input terminal of the control circuit is "1", that is,
It becomes "HIGH" and the B pattern input terminal remains "0", that is, "LOW".

(F13) Operating state 13: Next, in the operating state 13 in which the terminal contact portion 662d of the contact spring 662 rotates clockwise from the start position 670 to a position of about 300 °, the terminal contact portion 662d has the VDD pattern. 65
6 comes into contact with the second pattern portion 656t of the terminal contact portion 6t.
62e is a first pattern portion 65 of the VDD pattern 656.
6s, and the terminal contact portion 662f is connected to the VDD pattern 6
56, and is in contact with the second pattern portion 656t. In this operating state 13, neither the A pattern detection signal nor the B pattern detection signal is input to a control circuit (not shown). That is, in this operating state 13, the control circuit A
The pattern input terminal and the B pattern input terminal are both “0”, that is, “LOW”.

(F14) Operation Returning to Start State When the terminal contact portion 662d of the contact spring 662 rotates clockwise from the start position 670 to a position of 360 °, the operation returns to the start state shown in FIG. In this configuration, when the transmission wheel 620 makes one rotation, only about 1
The time, both the A pattern input terminal and the B pattern input terminal of the control circuit become “1”. Then, before the A pattern input terminal and the B pattern input terminal both become "1", "normal rotation" can be determined by making the A pattern input terminal "1". Therefore, when the transmission wheel 620 is configured to make one rotation in 24 hours, 24
A rotation position detection signal that detects "forward rotation" at each time is input to a control circuit (not shown). At the same time, when both the A pattern input terminal and the B pattern input terminal become “1”, the circumferential position of the transmission wheel 620 can be detected.

Next, when the transmission wheel rotates in the counterclockwise direction, that is, when the rotation direction is detected,
The operation of detecting the rotation start state will be described.

(G1) Operating state 1: FIG. 33 shows the initial state of the transmission wheel, that is, operating state 1 in which the terminal contact portion 662e of the contact spring 662 is at the start position 672.
Is shown. This state 1 is set to “0 °” in the timing chart of FIG. In the operation state 1 shown in FIG. 33, the terminal contact portion 662d contacts the first pattern portion 656s of the VDD pattern 656, and the terminal contact portion 662e becomes VDD.
Touching the second pattern portion 656t of the pattern 656,
The terminal contact portion 662f is in contact with the second pattern portion 656t of the VDD pattern 656. In this operation state 1, neither the A pattern detection signal nor the B pattern detection signal is input to the control circuit (not shown). That is, in this operation state 1, the A pattern input terminal and the B pattern input terminal of the control circuit are both “0”, that is, “LOW”.

(G2) Operating state 2: Next, the contact spring 6
Operation state 2 in which the terminal contact portion 662e of 62 rotates counterclockwise from the start position 670 to a position about 15 °
Then, the terminal contact portion 662d contacts the first pattern portion 656s of the VDD pattern 656, and the terminal contact portion 662e.
Contacts the B pattern 654, and the terminal contact portion 662f
It is in contact with the second pattern portion 656t of the DD pattern 656. In this operation state 2, only the B pattern detection signal is input to the control circuit (not shown). That is, in this operation state 2, the A pattern input terminal of the control circuit remains “0”, that is, “LOW”, and the B pattern input terminal becomes “1”, that is, “HIGH”.

(G3) Operating state 3: Next, the contact spring 6
Operation state 3 in which the terminal contact portion 662e of 62 rotates counterclockwise from the start position 670 to a position of about 30 °
Then, the terminal contact portion 662d contacts the A pattern 652, the terminal contact portion 662e contacts the B pattern 654,
The terminal contact portion 662f is in contact with the second pattern portion 656t of the VDD pattern 656. In this operation state 3, the A pattern detection signal and the B pattern detection signal are input to a control circuit (not shown). That is, in this operation state 3, the A pattern input terminal of the control circuit becomes "1", that is, "HIGH", and the B pattern input terminal also becomes "1", that is, "HIGH".

(G4) Operating state 4: Next, the contact spring 6
Operation state 4 in which the terminal contact portion 662e of 62 rotates counterclockwise from the start position 670 to a position of about 45 °
Then, the terminal contact portion 662d is in contact with the A pattern 652, and the terminal contact portion 662e is in the first position of the VDD pattern 656.
The contact portion 662f contacts the pattern portion 656s, and the terminal contact portion 662f contacts the second pattern portion 656t of the VDD pattern 656. In this operation state 4, only the A pattern detection signal is input to the control circuit (not shown). That is,
In this operation state 4, the A pattern input terminal of the control circuit remains "1", that is, "HIGH", and the B pattern input terminal is "0", that is, "LOW".

Therefore, as shown in FIG. 32, the state where both the A-pattern input terminal and the B-pattern input terminal of the control circuit are "1" continues for about one hour. This is because when the transmission wheel is configured to make one rotation in 24 hours, it takes about one hour for the transmission wheel to rotate 15 °.

(G5) Operating state 5: Next, contact spring 6
Operation state 5 in which the terminal contact portion 662e of 62 rotates counterclockwise from the start position 670 to a position of about 60 °
Then, the terminal contact portion 662d contacts the second pattern portion 656t of the VDD pattern 656, and the terminal contact portion 662e.
Is in contact with the first pattern portion 656s of the VDD pattern 656, and the terminal contact portion 662f is in contact with the second pattern portion 656t of the VDD pattern 656. In this operation state 5, neither the A pattern detection signal nor the B pattern detection signal is input to the control circuit (not shown). That is, in this operation state 5, the A pattern input terminal and the B pattern input terminal of the control circuit are both “0”, that is, “LOW”.

(G6) Subsequent operation state: As shown in FIG. 34, in the operation state in which the terminal contact portion 662e has rotated counterclockwise from the start position 670 to the position of 105 °, the A pattern input terminal of the control circuit. Becomes "1", that is, "HIGH". In an operating state in which the terminal contact portion 662e rotates counterclockwise from the start position 670 to a position of 135 °, the A pattern input terminal and the B pattern input terminal of the control circuit are both “0”, that is, “LOW”. It is. In an operating state in which the terminal contact portion 662e rotates counterclockwise from the start position 670 to a position of 157.5 °, the B pattern input terminal of the control circuit becomes “1”, that is, “HIGH”.

The terminal contact portion 662e is at the start position 670
In the operating state rotated counterclockwise from the position to 135 °, both the A pattern input terminal and the B pattern input terminal of the control circuit are “0”, that is, “LOW”.
It is. In an operating state in which the terminal contact portion 662e rotates counterclockwise from the start position 670 to a position of 247.5 °, the A pattern input terminal of the control circuit becomes “1”, that is, “HIGH”. In an operating state in which the terminal contact portion 662e rotates counterclockwise from the start position 670 to a position of 277.5 °, both the A pattern input terminal and the B pattern input terminal of the control circuit are “0”,
That is, "LOW".

When the terminal contact portion 662e is at the start position 670
In the operating state rotated counterclockwise from the position to the position 300, the B pattern input terminal of the control circuit becomes "1", that is, "HIGH". In an operating state in which the terminal contact portion 662e rotates counterclockwise from the start position 670 to a position of 330 °, both the A pattern input terminal and the B pattern input terminal of the control circuit are “0”, that is, “LOW”. It is. Accordingly, when the terminal contact portion 662e is shifted from the start position 670 by more than 60 ° to 360 °,
In the operating state rotated in the counterclockwise direction, there is no state where both the A pattern input terminal and the B pattern input terminal become “1”. Then, the terminal contact portion 66 of the contact spring 662
When 2e rotates counterclockwise from the start position 670 to the position of 360 °, it returns to the initial state shown in FIG. 33 again.

In this configuration, when the transmission wheel 620 makes one rotation, both the A-pattern input terminal and the B-pattern input terminal of the control circuit become "1" for about one hour only once. Then, before the pattern A input terminal and the pattern B input terminal both become "1", "reverse rotation" can be determined by making the pattern B input terminal "1". Therefore, when the transmission wheel 620 is configured to make one rotation in 24 hours, a rotation position detection signal that detects “reverse rotation” is input to a control circuit (not shown) every 24 hours. At the same time, when both the A pattern input terminal and the B pattern input terminal become “1”, the circumferential position of the transmission wheel 620 can be detected.

(7) Overall Configuration of the Electronic Timepiece of the Sixth Embodiment of the Present Invention FIG. 14 shows a front part of a movement (mechanical body) of a sixth embodiment of the electronic timepiece of the present invention. Here, the “front side portion” refers to a portion of the main plate opposite to the side where the dial 570 is located. FIG. 15 shows a sixth embodiment of the electronic timepiece of the invention.
3 shows a back side portion of the movement (machine body) according to the embodiment. Here, the “back side portion” refers to a portion on the side where the dial 570 is located with respect to the main plate. That is, the date indicator is incorporated in the “back side portion”. The movement (mechanical body) of the electronic timepiece according to the sixth embodiment of the present invention shown in FIGS. 14 to 20 also includes a contact spring. Referring to FIG. 14 to FIG. 20, in the sixth embodiment of the present invention, the electronic timepiece has a main plate 112. Rotor 6 of step motor 610
The 12 meshes with the fifth wheel & pinion 614, and the fifth wheel & pinion 614 meshes with the fourth wheel & pinion 616. The rotation of the fourth wheel & pinion 616 causes the minute wheel 620 to rotate via the third wheel & pinion 618, and the hour wheel 554 to rotate via the minute wheel & pinion 622.

The 24-hour wheel 550 has a 24-hour contact spring 552.
Having. The 24:00 contact spring 552 is connected to the circuit block 53.
4 are arranged so as to be able to contact the first pattern (not shown). The 24-hour wheel 550 meshes with the hour wheel 554 and rotates once a day. The hour wheel 554 makes one revolution every 12 hours, and indicates “hour” by an hour hand (not shown) attached to the hour wheel 554.

Ultrasonic rotor shaft 12 of ultrasonic motor 132
0 is fixed to the base plate 112, and the ultrasonic rotor 102 is rotatably incorporated in the ultrasonic rotor shaft 120. The ultrasonic rotor pinion 102b of the ultrasonic rotor 102 meshes with the date turning intermediate gear 104a of the date turning intermediate wheel 104. The date turning intermediate pinion 104b of the date turning intermediate wheel 104 meshes with the date turning gear 106a of the date turning wheel 106. A date finger 108 is provided on the date wheel 106, and a date wheel 110, which rotates simultaneously with the rotation of the date wheel 106, is rotatably incorporated in the main plate 112. Battery 114 is ground plate 112
In contrast, the date indicator 110 is mounted on the side opposite to the side on which the date indicator 110 is mounted. The day jumper 116 is the day wheel hold 11
8 are formed integrally. The setting portion 116a of the date jumper 116 sets the date wheel teeth 110a. Day jumper 11
6 has a jumper spring portion 116b.

That is, the date driving wheel 106 has the date driving wheel contact spring 556. The date wheel contact spring 556 is arranged so as to be able to contact a second pattern (not shown) of the circuit block 534. In the embodiment of the electronic timepiece of the present invention shown in FIGS. 14 to 20, a day wheel 568 is provided to display the day of the week. The display of the day of the week may be performed by a day wheel which is rotated by the rotation of the ultrasonic motor.

(8) Structure and Function of Display Car Feed Detecting Mechanism in Seventh Embodiment of Electronic Timepiece of the Present Invention Referring to FIGS. 39 and 40, in the seventh embodiment of the electronic timepiece of the present invention, , Movement (machine body) 1100
Is composed of an analog electronic timepiece, and has a main plate 1102 that constitutes a movement substrate. Makin Shin 1104
Is rotatably incorporated in the winding guide hole of the main plate 1102. The dial 1106 is attached to the movement 1100. A switching device (not shown) operated by operating the winding stem 1104 is provided on the main plate 1102.

[0096] Of both sides of the main plate 1102, the dial 11
06 is referred to as the “back side” of the movement 1100, and the side opposite to the side having the dial 1106 is referred to as the “front side” of the movement 1100. Movement 110
The train wheel incorporated into the “front side” of 0 is called “front train wheel”,
The train wheel incorporated into the “back side” of the movement 1100 is referred to as “back train wheel”. The switching device is movement 1.
It may be integrated into the “front side” of the movement 100 or may be integrated into the “back side” of the movement 1100.
Display cars such as a date wheel, a day wheel, etc. are incorporated in the “back side” of the movement 1100. Date wheel 1120 is main plate 1102
It is arranged to be rotatable. The date wheel 1120 includes a date wheel gear portion 1120a and a date character printing portion 1120b.
Date characters 1120c from "1" to "31" are printed on the date character print portion 1120b. To simplify the drawing, FIG. 39 shows only “5” of the date character 1120c. The date wheel gear portion 1120a includes 31 date wheel teeth.

An ultrasonic motor 1130 for rotating date indicator 1120 is arranged on main plate 1102. The motor that rotates the date wheel 1120 may be an electromagnetic motor or a step motor. By using the ultrasonic motor 1130, the date wheel 1120 can be reliably rotated with a small number of reduction gear trains. Ultrasonic motor 11
The display car rotated by 30 may be a day wheel, a day wheel, or another type of vehicle that displays time or calendar information, such as an hour wheel, a month wheel, Year car,
It may be a moon age display car or the like. Ultrasonic motor 1130
Is a motor shaft 1132, an ultrasonic stator 1122,
And an ultrasonic rotor 1134. Ultrasonic rotor 113
4 has an ultrasonic rotor pinion 1134b. Motor shaft 1
132, a first shaft portion 1132a is fixed to the main plate 1102, and the second shaft portion 1132b has an ultrasonic stator 112.
2 is fixed, and an ultrasonic rotor 1134 is rotatably guided by the third shaft portion 1132c. Ultrasonic rotor 1
A pressure spring 1136 is provided for pressing the 134 against the ultrasonic stator 1122 by elastic force.

A date indicator holder 1140 rotatably supports the date indicator 1120 with respect to the main plate 1102. Day rotation intermediate car 1
142 is rotatably supported by the main plate 1102 and the date wheel holder 1140. The date turning intermediate wheel 142 has a date turning intermediate gear 1142a and a date turning intermediate pinion 1142b.
Ultrasonic rotor pinion 1134b is a date rotating intermediate gear 1142
a. The date wheel 1150 is the main plate 1102
It is supported rotatably. The date wheel 1150 includes a date gear 1150a, a date feed gear portion 1150b, a tip shaft portion 1150c, a spring guide portion 1150d, and a support portion 1150e. The date dial gear 1150a meshes with the date dial intermediate pinion 1142b. The date feed gear portion 1150b meshes with the date wheel gear portion 1120a. The date feed gear portion 1150b includes four date feed teeth. The end surface of the support portion 1150e is in contact with the date wheel holder 1140.

The contact spring 1160 has a spring guide portion 1150
d. The contact spring 1160 is a date wheel 1150
Is configured to rotate integrally with the date driving wheel 1150 by the rotation of. For example, the contact spring 1160 is non-rotatably fitted into the spring guide portion 1150d. Referring to FIGS. 40 and 41, the circuit block 11
72 is provided on the movement 1100. The circuit block 1172 includes a circuit board 1170, an integrated circuit, and a crystal oscillator (not shown). A contact pattern 1174 is formed on the circuit board 1170. The contact spring 1160 contacts the contact pattern 1174 or contacts the contact pattern 117.
4 to be rotatable. The contact pattern 1174 is electrically connected to the integrated circuit.

The contact spring 1160 has the contact pattern 1174
By contacting with, the state of rotation of the date driving wheel 1150 can be detected. When the contact spring 1160 contacts the contact pattern 1174, a rotation signal regarding the state of rotation of the date indicator wheel 1150 output from the contact pattern 1174 is input to the ultrasonic motor drive circuit. Referring to FIG. 42, the contact pattern 1174 is a reference potential pattern 117.
4a and a contact switch pattern 1174b. The reference potential pattern 1174a is conductive to one potential of a battery (not shown), for example, positive. The contact switch pattern 1174b is electrically connected to a contact switch terminal of the integrated circuit. The contact spring 1160 is connected to the first contact portion 11.
60a, a second contact portion 1160b, and a slot 1160c.
And The elongated hole 1160c is arranged on a spring guide portion 1150d of the date indicator wheel 1150, and the contact spring 1160 is configured to rotate integrally with the date indicator wheel 1150.

The first contact portion 1160a has a long hole 1160c.
And the second contact portion 1160b extends from the elongated hole 1160c in the second direction. The first direction and the second direction are configured to form an angle of 180 degrees with respect to the long hole 1160c. First contact portion 11
60a and the second contact portion 1160b are provided so as to contact the contact pattern 1174 by elastic force.
The contact spring 1160 is made of, for example, a conductive elastic material such as stainless steel. By rotating the date wheel 1150, the first contact point portion 1160a and the second
The contact portion 1160b has a reference potential pattern 1174a,
Each pattern can be contacted in the order of the contact switch patterns 1174b. As shown in FIG. 42, when both the first contact portion 1160a and the second contact portion 1160b are in contact with the reference potential pattern 1174a, no rotation signal is output.

On the other hand, as shown in FIG.
When the contact portion 1160a is in contact with the reference potential pattern 1174a and the second contact portion 1160b is in contact with the contact switch pattern 1174b, a rotation signal is output. Similarly, even when the first contact portion 1160a is in contact with the contact switch pattern 1174b and the second contact portion 1160b is in contact with the reference potential pattern 1174a, a rotation signal is output. First contact portion 11
In a state where neither 60a nor the second contact portion 1160b is in contact with the contact switch pattern 1174b, no rotation signal is output.

(9) Structure and operation of the front side of the electronic timepiece according to the seventh embodiment of the present invention Next, the structure of the front side of the electronic timepiece according to the seventh embodiment of the present invention will be described. Referring to FIGS. 44 and 45,
On the front side of the movement 1100, a circuit block 117 is provided.
2 and the circuit block 1172 is provided on the circuit board 1
170, an integrated circuit 210, and a crystal oscillator 1212. Movement 1100 includes coil block 122
0, a stator 1222, and a rotor 1224. A fifth wheel & pinion 1230 is arranged to rotate based on rotation of rotor 1224. The fourth wheel & pinion 1232 is arranged to rotate based on the rotation of the fifth wheel & pinion 1230. A second hand 1234 indicating “second” is attached to the fourth wheel & pinion 1232. The third wheel 1236 is the fourth wheel 1232
It is arranged to rotate based on the rotation of. Minute wheel 12
40 is arranged to rotate based on the rotation of the third wheel & pinion 1236. The minute hand 1242 indicating “minute” is the minute wheel 12
40 attached. A battery 1250 is arranged on the circuit block 1172 and the train wheel bridge 1246.

Next, the operation of the timepiece with a display wheel according to the present invention will be described. Referring to FIG. 46, the oscillation circuit 1424
Outputs a reference signal. The oscillation circuit 1424 includes a crystal oscillator 1212 that constitutes a source oscillation. Crystal oscillator 1212
Oscillates at, for example, 32,768 Hertz. The frequency dividing circuit 1426 divides the frequency of the output signal of the oscillation circuit 1424 based on the vibration of the crystal oscillator 1212. The motor driving circuit 1428 outputs a motor driving signal for driving the step motor based on the output signal of the frequency dividing circuit 1426. The oscillation circuit 1424, the frequency dividing circuit 1426, and the motor driving circuit 1428 are included in the integrated circuit 1210. When the coil block 1220 receives a motor drive signal, the stator 1222 is magnetized and the rotor 1224 is rotated. The rotor 1224 rotates, for example, 180 degrees every second.

Based on the rotation of the rotor 1224, the fourth wheel 1232 rotates through the rotation of the fifth wheel 1230. The fourth wheel & pinion 1232 is configured to make one revolution per minute. The second hand 1234 rotates integrally with the fourth wheel 1232. The third wheel & pinion 1236 rotates based on the rotation of the fourth wheel & pinion 1232. The minute wheel 1240 rotates based on the rotation of the third wheel & pinion 1236. The minute hand 1242 rotates integrally with the minute wheel 1240. The slip mechanism (not shown) is used to
40. By rotating the winding stem 1104 with the second hand 1234 stopped, the minute hand 1242 and the hour hand can be rotated by the slip mechanism when adjusting the hands. The minute wheel 1240 makes one rotation per hour. The minute wheel 1270 rotates based on the rotation of the minute wheel 1240. The hour wheel 1272 rotates based on the rotation of the minute wheel 1270. Hour wheel 1272 every 1 hour
Rotate. An hour hand 1274 is attached to the hour wheel 1272. The hour hand 1274 rotates integrally with the hour wheel 1272.

The ultrasonic motor driving circuit 1310 controls the ultrasonic motor 113 based on the output signal of the frequency dividing circuit 1426.
An ultrasonic motor driving signal for driving 0 is output. The ultrasonic motor drive circuit 1310 is built in the integrated circuit 1210. The date driving intermediate wheel 1142 is provided with the ultrasonic motor 11
It rotates based on the operation of 30. The date wheel 1150 rotates based on the rotation of the date intermediate wheel 1142. The rotation of the date wheel 1150 causes the date feed gear portion 11 to rotate.
50b rotates the date wheel 1120. The signal output from the ultrasonic motor drive circuit 1310 is a date indicator 112 per day.
It is output so that 0 is rotated by one tooth. Date driving car 1
As the 150 rotates, the contact spring 1160 rotates. As the contact spring 1160 rotates, the first contact portion 1160a comes into contact with the reference potential pattern 1174a, and the second contact portion 160b comes into contact with the contact switch pattern 1174b. In this state, a rotation signal is output to rotation detection circuit 1320. The rotation detection circuit 1320 is built in the integrated circuit 1210.

When the rotation detection circuit 1320 receives the rotation signal, the rotation detection circuit 1320 outputs an ultrasonic motor control signal to the ultrasonic motor drive circuit 1310 to control the operation of the ultrasonic motor 1130. When the ultrasonic motor drive circuit 1310 receives the ultrasonic motor control signal,
The output of the ultrasonic motor drive signal is stopped. With this configuration, the rotation of the date wheel 1120 can be controlled. Furthermore, the rotation of the date wheel 1150 causes the contact spring 1160 to rotate. As the contact spring 1160 rotates, the first contact portion 1160a separates from the reference potential pattern 1174a and contacts the contact switch pattern 1174b, and the second contact portion 1160b separates from the contact switch pattern 1174b and contacts the reference potential pattern 1174a. It comes into contact. Even in this state, a rotation signal is output to the rotation detection circuit 1320.

When the rotation detection circuit 1320 receives a rotation signal, the rotation detection circuit 1320 outputs an ultrasonic motor control signal to the ultrasonic motor drive circuit 1310 to control the operation of the ultrasonic motor 1130. When the ultrasonic motor drive circuit 1310 receives the ultrasonic motor control signal,
The output of the ultrasonic motor drive signal is stopped. With this configuration, the date wheel 1120 can be rotated by one tooth once a day. By operating the date correction switch 1330, the date wheel 1120 can be rotated. Date correction switch 133
When 0 is activated, the ultrasonic motor drive circuit 1310 outputs an ultrasonic motor drive signal for driving the ultrasonic motor 1130. With this configuration, the display of the date wheel 1120 can be changed. Date correction switch 1330
It may be configured to operate by the operation of the button 04, or a button or the like for operating the date correction switch 1330 may be provided.

(10) Structure and Operation of the Eighth Embodiment of the Electronic Timepiece of the Present Invention Next, the structure of the calendar mechanism of the eighth embodiment of the electronic timepiece of the present invention will be described. Referring to FIG. 47, in an eighth embodiment of the present invention, an electronic timepiece 14 with calendar
In 00, an ultrasonic motor (not shown) is used as a motor for rotating the date wheel 1410. The ultrasonic motor includes an ultrasonic rotor. The ultrasonic rotor kana of the ultrasonic rotor meshes with the date rotating intermediate gear of the date rotating intermediate wheel 1404. The intermediate date pinion of the intermediate date wheel 1404 meshes with the date wheel of the date wheel 1406. Day feeding nail 14
08 is provided on the date wheel 1406, and the date wheel 1406 is provided.
With the rotation of, it rotates simultaneously. 1408
Are the four day feeding nail parts 1408g1 and 1408g
2, 1408g3 and 1408g4.

A date indicator 1410 is rotatably mounted on the main plate 1412. The date wheel 1410 has 31 date wheel teeth. A date character consisting of numbers “1” to “31” is provided on the display surface of the date wheel 1410. Here, in order to simplify the drawing, only one date character “5” is shown in FIG.

The ground plate 141 is rotated so that the date jumper 1416 rotates about the date jumper rotation center 1416c.
2 so as to be rotatable. Day jumper 1416
Has a jumper spring portion 1416f. Day jumper 1
The tail part 1416t of 416 is positioned by the positioning part 1412d. Day jumper spring part 1416f
Due to the spring force of the
“a” sets the date wheel tooth 1410a, and the setting portion 1416b of the date jumper 1416 sets the date wheel tooth 1410b. The date jumper 1416 may be configured as a separate component as shown, or may be formed integrally with other components such as a date wheel holder or a backing object holder.

[0112] Each of the day feeding nail portions 1408g1,
1408g2, 1408g3, and 1408g4 are formed in the same shape, and have an arc portion centered at the center 1408c or an outer peripheral portion 1408t having a shape close to the arc, and extend from both ends of the outer peripheral portion 1408t toward the center 1408c, respectively. One side part 1408s1,
1408s2. FIG. 47 shows an outer peripheral portion 1408.
t and the side portions 1408s1 and 1408s2 are displayed only for the date finger portion 1408g3, but the outer peripheral portion 1408t and the side portions 1408s1 and 1408 are displayed.
The shape of s2 is different from that of the other date feeding nail portions 1408g1, 14
The same applies to 08g2 and 1408g4.

[0113] Outer peripheral portion 1408t and side portion 1408s
Corners (relatively small arcs) are provided at intersections with 1, 1408s2, respectively. Side part 14
08s1 and 1408s2 may be constituted by one straight line, one or more arcs, or a combination of an arc and a straight line. Side part 1
408s1 and 1408s2 are formed to have a shape that allows the date dial 1410 to rotate reliably by rotating the date finger 1408.

On the other hand, the outer peripheral portion 1408t is formed in a shape such that when the date indicator 1410 rotates and comes into contact with the outer peripheral portion 1408t, the rotation of the date indicator 1410 is stopped. That is, in the embodiment shown in FIG. 47 of the electronic timepiece of the present invention, the date finger 1408 is provided with the respective date finger portions 1408g1, 1408g2, 140.
8g3 and 1408g4 are configured to have a lock tooth shape at the distal end.

As in the fifth embodiment of the present invention described above, a contact spring is provided on the date wheel 1404, and the date pattern 1406 is brought into contact with the contact pattern of the circuit board and the contact spring. It is configured to detect the state of rotation. The motor drive circuit is configured to control the rotation of the ultrasonic motor by inputting a rotation signal output from the contact pattern.

One date wheel tooth 1410d of the date wheel 1410
But the rotation center 1410k of the date wheel 1410 and the date feed 1
The date jumper 1416 is positioned on the straight line 1408A passing through the rotation center 1408c of the
It is configured to regulate the position along the direction of rotation of. When the ultrasonic motor is stopped, two of the four date pawl portions 1408
g1 and 1408g2 are positioned so as to be symmetrical with the straight line 1408A as the axis of symmetry.

Next, the operation of the calendar mechanism of the electronic timepiece according to the eighth embodiment of the present invention will be described. In the electronic timepiece 1400 of the present invention, as in the case of the seventh embodiment of the present invention described with reference to FIGS. The two contact portion 1160b includes a reference potential pattern 1174a and a contact switch pattern 1174.
Each pattern can be contacted in the order of b. Then, as shown in FIG. 42, both the first contact portion 1160a and the second contact portion 1160b are connected to the reference potential pattern 117.
No rotation signal is output in the state of contact with 4a.

On the other hand, as shown in FIG.
When the contact portion 1160a is in contact with the reference potential pattern 1174a and the second contact portion 1160b is in contact with the contact switch pattern 1174b, a rotation signal is output. Similarly, even when the first contact portion 1160a is in contact with the contact switch pattern 1174b and the second contact portion 1160b is in contact with the reference potential pattern 1174a, a rotation signal is output.

Both the first contact portion 1160a and the second contact portion 1160b have contact switch patterns 1174.
In a state where the contact does not make contact with b, no rotation signal is output. Therefore, referring to FIG. 47, by operating the ultrasonic motor to rotate the date indicator wheel 1406 90 degrees clockwise, the date finger 1408g1 also rotates clockwise 90 degrees, and Day wheel tooth 1410 of 1410
d can be rotated clockwise. And
By the operation of the date jumper 1416, the date wheel 1410 stops rotating clockwise (360/31) degrees. In this state, the motor drive circuit controls the rotation of the ultrasonic motor by inputting the rotation signal output from the contact pattern. Therefore, the date driving wheel 1406 rotates 90 degrees clockwise.
Stop after rotating by degrees.

Further, by operating the ultrasonic motor to rotate the date wheel 1406 90 degrees in the counterclockwise direction, the date finger 1408g1 also moves 9 days in the counterclockwise direction.
By rotating by 0 degrees, the date wheel tooth 1410d of the date wheel 1410 can be rotated counterclockwise. Then, due to the operation of the date jumper 1416, the date wheel 1410 stops rotating (360/31) degrees counterclockwise. Also in this state, the motor drive circuit controls the rotation of the ultrasonic motor by inputting the rotation signal output from the contact pattern. Therefore, the date driving wheel 1406 stops rotating 90 degrees counterclockwise.

With this configuration, in the electronic timepiece of the present invention, by rotating the date finger 1408 clockwise, the date wheel 1410 can be rotated clockwise, and the date finger 1408 can be rotated. By rotating in the counterclockwise direction, the date dial 1410 can be rotated in the counterclockwise direction. By operating the date jumper 1416, the position of the date wheel 1410 along the rotation direction is always accurately positioned.

Next, when the electronic timepiece receives an impact or the like,
The operation when 10 rotates will be described. Referring to FIG. 48, when the date indicator 1410 rotates in the counterclockwise direction indicated by the arrow 1412A, the date indicator tooth 14 of the date indicator 1410 is rotated.
10e is the outer peripheral portion 140 of the date feeding nail portion 1408g2
Contact 8t. The shape of the outer peripheral portion 1408t is the center 1
An arc centered at 408c or a shape close to this arc. The index torque of the ultrasonic motor is transmitted to the date finger 1408. Accordingly, the date wheel teeth 141
Due to the contact of 0e, the date finger 1408 cannot be rotated.

In the state shown in FIG. 48, since the setting portion 1416b of the date jumper 1416 is in contact with the date wheel tooth 1410b, the date wheel 1410 is rotated clockwise by the spring force of the date jumper spring portion 1416f. FIG. 4
7 can be returned.

Next, referring to FIG.
Rotates clockwise as indicated by arrow 1412B,
The date wheel tooth 1410c of the date wheel 1410 is a date feeding pawl portion 14.
08g1 contacts the outer peripheral portion 1408t. Therefore, when the date indicator tooth 1410c comes into contact, the date finger 14
08 cannot be rotated.

In the state shown in FIG. 49, since the setting portion 1416a of the date jumper 1416 is in contact with the date indicator tooth 1410a, the date indicator 1410 is rotated counterclockwise by the spring force of the date jumper spring portion 1416f. It can be rotated to return to the state shown in FIG.

That is, in the electronic timepiece of the present invention, the date dial 1
Due to the engagement between the date indicator tooth 1410e or 1410c of 410 and the date finger 1408 and the index torque of the ultrasonic motor, the date indicator 1410 can be rotated in either the clockwise direction or the counterclockwise direction. It is configured such that the date finger 1408 cannot be rotated. For example, the date indicator 141 generated by an external force such as an impact
The rotational force from 0 is F1, the index torque of the ultrasonic motor is F2, and the date wheel tooth 1410e or 1410c
The rotational resistance force caused by the engagement between the wheel and the date finger 1408 is F3, and the reduction ratio of the train wheel from the ultrasonic motor to the date finger 1408 is n.

A force F1 for rotating the date wheel 1410 by an external force such as an impact, and a force (F2 + F3) / for stopping the rotation.
Compare n. At this time, 1408g
Due to the shape of the outer peripheral portion 1408t of F1, F3 can be made larger than F1. Therefore, with the configuration of the electronic timepiece of the present invention, (F2 + F3) / n >> F1, and the rotation of the date wheel 1410 caused by an external force can be effectively prevented.

Next, referring to FIG.
428 day feeding nail parts 1428g1, 1428g2,
1428g3 and 1428g4 are formed in the same shape, and have an outer peripheral portion 1428u having an arc shape centered at a position away from the center 1428c. In FIG. 50, the outer peripheral portion 1428u is displayed only for the date finger portion 1428g3, but the shape of the outer peripheral portion 1428u is different from the other date finger portions 1428g1, 1428g2, and 1428.
The same applies to g4.

[0129] The outer peripheral portion 1428u is
The rotation of the date wheel 1410 can be ensured by the rotation of the date wheel 8, and the date wheel 1410 is formed into a shape that stops the rotation of the date wheel 1410 when the date wheel 1410 rotates and comes into contact with the outer peripheral portion 1428 u. Have been. That is, in the embodiment shown in FIG. 50 of the electronic timepiece according to the present invention, the date finger 1428 is replaced with each date finger part 1428g.
1, 1428g2, 1428g3, and 1428g4 are configured to have lock tooth shapes at the distal ends.

Referring to FIG. 51, when the date indicator 1410 rotates counterclockwise as indicated by the arrow 1422A, the date indicator tooth 1410e of the date indicator 1410 becomes the date finger part 1428.
It contacts the outer peripheral portion 1428u of g2. Outer part 142
The shape of 8u is an arc shape having a center at a position away from the center 1428c. The index torque of the ultrasonic motor is transmitted to the date finger 1428. Therefore, the date finger 1428 cannot be rotated by the contact of the date wheel tooth 1410e.

In the state shown in FIG. 51, since the setting portion 1416b of the date jumper 1416 is in contact with the date wheel tooth 1410b, the date wheel 1410 is rotated clockwise by the spring force of the date jumper spring portion 1416f. Fig. 5
The state shown in FIG.

Next, referring to FIG.
Rotates clockwise as indicated by arrow 1422B,
The date wheel tooth 1410c of the date wheel 1410 is a date feeding pawl portion 14.
It contacts the outer peripheral portion 1428u of 28g1. Therefore, when the date indicator tooth 1410c comes into contact, the date finger 14
28 cannot be rotated.

In the state shown in FIG. 52, since the setting portion 1416a of the date jumper 1416 is in contact with the date wheel tooth 1410a, the date wheel 1410 is turned counterclockwise by the spring force of the date jumper spring portion 1416f. It can be rotated to return to the state shown in FIG.

Next, referring to FIG.
438 day feeding nail part 1438g1, 1438g2,
1438g3 and 1438g4 are formed in the same shape and have side portions 1438v1 and 1438v2 having acute-angled tips.
Having. FIG. 53 shows side portions 1438v1 and 1438v1.
Although 38v2 is shown only for the date feeding portion 1438g3, the side portions 1438v1 and 1438v2 are shown.
The shape of the other day feeding nail portion 1438g1, 1438
The same applies to g2 and 1438g4.

The side portions 1438v1 and 1438v2
And the arcuate side portions following these are the date finger 14
The rotation of the dial 38 allows the date dial 1410 to rotate reliably. Side part 14
38v1 and 1438v2 are formed in such a shape as to stop the rotation of the date wheel 1410 when the date wheel 1410 rotates and comes into contact with the side face portions 1438v1 and 1438v2. That is, in the embodiment shown in FIG. 50 of the electronic timepiece according to the present invention, the date finger 1438 includes the respective date finger portions 1438g1, 1438g2, and 1438.
g3, 1438g4 are configured to have a locking tooth profile at the tip.

Referring to FIG. 54, when the date indicator 1410 rotates counterclockwise as indicated by arrow 1432A, the date indicator tooth 1410e of the date indicator 1410 has a date finger part 1438.
It contacts the side part 1438v2 of g2. At this time,
The index torque of the ultrasonic motor is 139
8 is transmitted. Therefore, the date finger 1438 cannot be rotated by the contact of the date wheel tooth 1410e.

In the state shown in FIG. 54, since the setting portion 1416b of the date jumper 1416 is in contact with the date wheel tooth 1410b, the date wheel 1410 is rotated clockwise by the spring force of the date jumper spring portion 1416f. Fig. 5
The state shown in FIG.

Next, referring to FIG. 55, the date indicator 1410
Rotates clockwise as indicated by arrow 1432B,
The date wheel tooth 1410c of the date wheel 1410 is a date feeding pawl portion 14.
It contacts the side part 1438v1 of 38g1. Also at this time, the index torque of the ultrasonic motor is transmitted to the date finger 1438. Therefore, the date wheel tooth 1410c
Contact, the date finger 1438 cannot be rotated.

In the state shown in FIG. 55, since the setting portion 1416a of the date jumper 1416 is in contact with the date wheel tooth 1410a, the date wheel 1410 is rotated counterclockwise by the spring force of the date jumper spring portion 1416f. It can be rotated to return to the state shown in FIG. With such a configuration, in the electronic timepiece of the present invention, when an external force due to an impact or the like is applied to the electronic timepiece, the date dial is hardly rotated.

(11) Further, the electronic timepiece of the invention may have the following configuration. [1] An electronic timepiece having a function of displaying calendar information, including a calendar signal generation circuit for counting calendar information such as year, month, day, and time information, and generating a calendar signal. A control circuit (130) having an ultrasonic motor drive circuit for outputting an ultrasonic motor drive signal for rotating the ultrasonic motor (132) based on a calendar signal output from the generation circuit, An ultrasonic rotor (1) having an ultrasonic stator (122) and receiving an ultrasonic motor drive signal and being frictionally driven by a vibration wave generated in the ultrasonic stator due to expansion and contraction of a piezoelectric element.
02), based on the rotation of the ultrasonic rotor (102), a calendar display wheel that operates based on the rotation of the ultrasonic rotor (102) and displays information regarding the calendar, and based on the rotation of the ultrasonic rotor (102). A day feed end detection contact member for detecting the end point of the day feed, a signal relating to the start of date feed output from the date feed start detection contact member is input, and a signal relating to the end of date feed output from the date feed end detection contact member And a date feed control circuit that controls the operation of a date display drive circuit that outputs a date display motor drive signal.

[2] The calendar display wheel is a date wheel (110) for displaying information relating to the day. The calendar signal generating circuit counts information relating to leap years and days from January to December, and performs an ultrasonic motor driving circuit. Outputs an ultrasonic motor drive signal based on the counting result of the calendar signal generation circuit, which is different from the end of a large month to the next month when the end of a small month changes to the next month. The electronic timepiece according to [1], wherein the date is set to 1 on the first day of each month. [3] The above-mentioned [2] or [2], further comprising a calendar wheel train operated based on the rotation of the ultrasonic rotor (102), wherein the calendar wheel is operated by the calendar wheel train. The electronic timepiece according to [2].

[4] The above-mentioned [1], further comprising a feed pawl that operates based on the rotation of the ultrasonic rotor (102), wherein the calendar display wheel is operated by the feed pawl. To [3] the electronic timepiece according to any one of [1] to [3]. [5] The electronic timepiece according to any one of [1] to [4], further including a setting member for setting a position along a rotation direction of the calendar display vehicle.

[0143]

According to the present invention, as described above, the electronic timepiece has the above-described configuration, and thus has the following effects. (1) An electronic timepiece having a transmission wheel rotation position detection device that accurately detects a position along the rotation direction of the transmission wheel can be realized. (2) It is possible to realize a small electronic timepiece having the transmission wheel rotational position detecting device. (3) It is possible to realize an electronic timepiece having a transmission wheel rotation position detecting device with high contact point durability.

(4) In an electronic timepiece having a date wheel,
It is possible to start the day feeding exactly at the same time every day. (5) In an electronic timepiece having a date indicator, the position of the date indicator can be accurately maintained. Therefore, there is almost no possibility that the position of the date character of the date indicator is shifted. (6) When an external force due to an impact or the like is applied to the electronic timepiece, the display wheel or the date wheel does not rotate. (7) Since the static torque of the motor for rotating the date wheel can be reduced, the power consumption of the motor can be reduced. That is, according to the present invention, an electronic timepiece having a long battery life can be realized.

[Brief description of the drawings]

FIG. 1 is a schematic plan view (perspective view) showing a calendar mechanism of an electronic timepiece according to a first embodiment of the invention.

FIG. 2 is a schematic sectional view showing a calendar mechanism of the electronic timepiece according to the first embodiment of the invention.

FIG. 3 is a schematic sectional view showing a calendar mechanism part of another structure of the electronic timepiece according to the first embodiment of the invention.

FIG. 4 is a schematic block diagram showing a calendar mechanism of the electronic timepiece according to the first embodiment of the invention.

FIG. 5 is a schematic block diagram showing a calendar mechanism of an electronic timepiece according to a second embodiment of the present invention.

FIG. 6 is a schematic sectional view showing a calendar mechanism of an electronic timepiece according to a second embodiment of the invention.

FIG. 7 is a schematic block diagram showing a calendar mechanism of an electronic timepiece according to a third embodiment of the present invention.

FIG. 8 is a schematic sectional view showing a calendar mechanism of an electronic timepiece according to a third embodiment of the invention.

FIG. 9 is a schematic block diagram showing a calendar mechanism of an electronic timepiece according to a fourth embodiment of the invention.

FIG. 10 is a schematic sectional view showing a calendar mechanism of an electronic timepiece according to a fourth embodiment of the invention.

FIG. 11 is a schematic block diagram showing a calendar mechanism of an electronic timepiece according to a fifth embodiment of the invention.

FIG. 12 is a schematic plan view (perspective view) showing a calendar mechanism of an electronic timepiece according to a fifth embodiment of the invention.

FIG. 13 is a schematic sectional view showing a calendar mechanism of an electronic timepiece according to a fifth embodiment of the invention.

FIG. 14 is a schematic plan view (perspective view) showing a front side portion of a sixth embodiment of the electronic timepiece of the invention.

FIG. 15 is a schematic plan view (perspective view) showing the back side of the electronic timepiece according to the sixth embodiment of the invention.

FIG. 16 is a schematic partial sectional view showing a sixth embodiment of the electronic timepiece of the invention.

FIG. 17 is a schematic partial sectional view showing a sixth embodiment of the electronic timepiece of the invention.

FIG. 18 is a schematic partial cross-sectional view showing a sixth embodiment of the electronic timepiece of the invention.

FIG. 19 is a schematic partial cross-sectional view showing a sixth embodiment of the electronic timepiece of the invention.

FIG. 20 is a schematic partial cross-sectional view showing a sixth embodiment of the electronic timepiece of the invention.

FIG. 21 is a partial plan view showing a first structure of a contact portion according to a fifth embodiment of the electronic timepiece of the invention.

FIG. 22 is a partial cross-sectional view showing a first structure of a contact portion according to a fifth embodiment of the electronic timepiece of the invention.

FIG. 23 is a partial cross-sectional view showing an operation of a contact spring in a first structure of a contact portion according to a fifth embodiment of the electronic timepiece of the invention.

FIG. 24 is a partial plan view showing a second structure of the contact portion of the electronic timepiece according to the fifth embodiment of the invention.

FIG. 25 is a partial cross-sectional view showing an operation of a contact spring in a second structure of the contact portion according to the fifth embodiment of the electronic timepiece of the invention.

FIG. 26 is a partial cross-sectional view showing an operation of a contact spring in a modification of the second structure of the contact portion according to the fifth embodiment of the electronic timepiece of the invention.

FIG. 27 is a partial plan view showing a third structure of the contact portion of the electronic timepiece according to the fifth embodiment of the invention.

FIG. 28 is a partial plan view showing a fourth structure of the contact portion of the electronic timepiece according to the fifth embodiment of the invention.

FIG. 29 is a partial plan view showing a shape of a contact spring used in a fourth structure of the contact portion of the fifth embodiment of the electronic timepiece of the invention.

FIG. 30 is a partial plan view showing a shape of a circuit pattern used for a fourth structure of a contact portion according to a fifth embodiment of the electronic timepiece of the invention.

FIG. 31 is a partial plan view showing the operation of the fourth structure of the contact portion in the forward rotation direction in the fifth embodiment of the electronic timepiece of the invention.

FIG. 32 is a timing chart of the fourth structure of the contact portion of the electronic timepiece according to the fifth embodiment of the present invention in the forward rotation direction operation.

FIG. 33 is a partial plan view showing the operation of the fourth structure of the contact portion in the reverse direction in the fifth embodiment of the electronic timepiece of the invention.

FIG. 34 is a timing chart at the time of the operation of the fourth structure of the contact portion in the reverse direction in the fifth embodiment of the electronic timepiece of the invention.

FIG. 35 is a block diagram illustrating a configuration of a drive circuit of an ultrasonic motor according to a fifth embodiment of the electronic timepiece of the invention.

FIG. 36 is a plan view of an ultrasonic stator of an ultrasonic motor according to a fifth embodiment of the electronic timepiece of the invention.

FIG. 37 is a sectional view of an ultrasonic stator of an ultrasonic motor according to a fifth embodiment of the electronic timepiece of the invention.

FIG. 38 is a schematic block diagram showing a configuration of a conventional electronic timepiece.

FIG. 39 is a schematic plan view showing the structure on the back side of an electronic timepiece according to a seventh embodiment of the invention.

FIG. 40 is a partial cross-sectional view showing the structure of a display wheel feed mechanism and a display wheel feed detection mechanism of a seventh embodiment of the electronic timepiece of the invention.

FIG. 41 is a partial sectional view showing the structure of a date wheel and a contact spring according to a seventh embodiment of the electronic timepiece of the invention.

FIG. 42 is a partial cross-sectional view showing a relationship between a contact spring and a contact pattern when a contact is on in the seventh embodiment of the electronic timepiece of the invention.

FIG. 43 is a partial cross-sectional view showing a relationship between a contact spring and a contact pattern when a contact is off in an electronic timepiece according to a seventh embodiment of the present invention.

FIG. 44 is a schematic plan view showing the structure of the front side of an electronic timepiece according to a seventh embodiment of the invention.

FIG. 45 is a partial cross-sectional view showing a structure of a front train wheel of an electronic timepiece according to a seventh embodiment of the invention.

FIG. 46 is a block diagram showing a seventh embodiment of the electronic timepiece of the invention.

FIG. 47 is a schematic plan view showing a calendar mechanism part of an electronic timepiece according to an eighth embodiment of the present invention including a date finger of a first shape.

FIG. 48 is a schematic plan view showing a calendar mechanism portion of an electronic timepiece according to an eighth embodiment of the present invention having a date finger of the first shape in a state where the date wheel is rotated counterclockwise by an external force. FIG.

FIG. 49 is a schematic plan view showing a calendar mechanism portion of an electronic timepiece according to an eighth embodiment of the present invention having a date finger of a first shape in a state where the date wheel is rotated clockwise by an external force. It is.

FIG. 50 is a schematic plan view showing a calendar mechanism portion of an electronic timepiece according to an eighth embodiment of the present invention provided with a date finger of a second shape.

FIG. 51 is a schematic plan view showing a calendar mechanism portion of an electronic timepiece according to an eighth embodiment of the present invention having the date finger of the second shape in a state where the date wheel is rotated counterclockwise by an external force. FIG.

FIG. 52 is a schematic plan view showing a calendar mechanism part of an electronic timepiece according to an eighth embodiment of the present invention provided with the date finger of the second shape in a state where the date wheel is rotated clockwise by an external force. It is.

FIG. 53 is a schematic plan view showing a calendar mechanism of an electronic timepiece according to an eighth embodiment of the present invention provided with a date finger of a third shape.

FIG. 54 is a schematic plan view showing a calendar mechanism portion of an electronic timepiece according to an eighth embodiment of the present invention having a date finger of a third shape in a state where the date wheel is rotated counterclockwise by an external force. FIG.

FIG. 55 is a schematic plan view showing a calendar mechanism portion of an electronic timepiece according to an eighth embodiment of the present invention having a date finger of a third shape in a state where the date wheel is rotated clockwise by an external force. It is.

[Explanation of symbols]

 REFERENCE SIGNS LIST 100 electronic timepiece 102 ultrasonic rotor 104 date intermediate wheel 106 date wheel 108 date finger 110 date wheel 112 main plate 114 battery 116 day jumper 118 date wheel holder 120 ultrasonic rotor shaft 122 ultrasonic stator 124 ultrasonic pressure spring 130 Control circuit 132 Ultrasonic motor (USM) 200 Electronic watch 300 Electronic watch 400 Electronic watch 500 Electronic watch 530 Front wheel train 532 24h contact 534 Circuit block 550 24 hour vehicle 552 24 hour contact spring 554 hour wheel 556 Date wheel contact spring 560 Day feed reduction train 562 Day feed motor 564 Day feed contact 568 Day wheel 570 Dial 620 Transmission wheel 622 Contact spring 624 Circuit board 626 A pattern 628 B pattern 630 Transmission wheel rotation center 640 C pattern 642 D pattern 652 A pattern 654 B pattern 656 VDD pattern 662 Contact spring 1100 Movement (mechanical body) 1102 Main plate 1104 Makin 1106 Dial 1120 Date wheel 1122 Ultrasonic stator 1130 Ultrasonic motor 1132 Motor shaft 1134 Ultrasonic rotor 1140 Date wheel holding 1142 Days Turn intermediate wheel 1150 Date wheel 1160 Contact spring 1160a First contact portion 1160b Second contact portion 1160c Slot 1170 Circuit board 1172 Circuit block 1174 Contact pattern 1174a Reference potential pattern 1174b Contact switch pattern 1210 Integrated circuit 1212 Crystal oscillator 1220 Coil block 1222 Stator 1224 Rotor 1230 5th wheel 1232 4th wheel 1234 Second hand 1236 Third wheel 1240 Minute wheel 1 42 minute hand 1246 wheel train receiver 1250 battery 1270 minute wheel of day 1272 hour wheel 1274 hour hand 1310 ultrasonic motor drive circuit 1320 rotation detection circuit 1330 day correction switch 1400 electronic clock 1404 date wheel intermediate wheel 1406 date wheel 1408 date wheel 1410 day Car 1412 Ground plate 1416 Day jumper 1420 Electronic clock 1426 Day clock 1428 Day clock 1430 Electronic clock 1436 Day clock 1438 Day clock

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Akihiko Inada 1-8-8 Nakase, Mihama-ku, Chiba-shi Inside Seiko Instruments Inc. (72) Inventor Mitsuru Ishii 1-8-chome Nakase, Mihama-ku, Chiba-shi, Chiba Inside of Iko Instruments Co., Ltd. (72) Inventor Yoshio Koyama 1-8-1, Nakase, Mihama-ku, Chiba City, Chiba Prefecture Inside of Iko Instruments Co., Ltd. (72) Shigeo Suzuki 1-8-8, Nakase, Mihama-ku, Chiba City, Chiba Prefecture Seiko Instruments (72) Inventor Masayuki Kawada 1-8-1, Nakase, Mihama-ku, Chiba-shi, Chiba Seiko Instruments Inc. (72) Inventor Yuko Sasaki 1-8-1, Nakase, Mihama-ku, Chiba-shi, Chiba Seiko Instruments Inc. (72) Invention Person Eriko Takakuwa 1-8-8 Nakase, Mihama-ku, Chiba-shi, Chiba Seiko Instruments Inc.

Claims (25)

[Claims] 1. A transmission wheel (620) that rotates based on rotation of a wheel train included in an electronic timepiece, and is fixed to the transmission wheel (620), rotates integrally with the transmission wheel (620), and is electrically conductive. A contact spring (622) having a contact spring (62) when the contact spring (622) rotates.
2) a detection pattern provided on the circuit board, which can contact the circuit board; and a rotation pattern of the transmission wheel (620) output by the detection pattern when the contact spring (622) comes into contact with the detection pattern. An electronic timepiece comprising: a control circuit that inputs a rotational position detection signal that detects a position in a direction. 2. The detection pattern includes a contact spring (62).
2) includes two detection patterns that can simultaneously contact the contact springs (622) when rotating, and the control circuit determines that the two detection patterns are contact springs (62).
A control circuit for inputting a rotation position detection signal for detecting a circumferential position of rotation of the transmission wheel (620) which is output by the two detection patterns when the conduction is performed in 2). Item 2. The electronic timepiece according to Item 1. 3. The detection pattern includes a contact spring (62).
2) When the rotation is performed, two detection patterns capable of simultaneously contacting the contact spring (622), and a non-functional pattern having no detection function provided between the two detection patterns. The control circuit includes two detection patterns each including a contact spring (62).
A control circuit for inputting a rotation position detection signal for detecting a circumferential position of rotation of the transmission wheel (620) which is output by the two detection patterns when the conduction is performed in 2). Item 2. The electronic timepiece according to Item 1. 4. A transmission wheel (620) that rotates based on rotation of a wheel train included in an electronic timepiece, and is fixed to the transmission wheel (620) and rotates integrally with the transmission wheel (620) to form a conductive member. A contact spring (622) having a contact spring (62) when the contact spring (622) rotates.
2) a first detection pattern and a second detection pattern provided on the circuit board, which are capable of contacting with the contact spring (622), the first detection pattern, and the second detection pattern;
Are a first detection state for generating a rotation position detection signal for detecting a circumferential position of rotation of the transmission wheel (620) only in the first detection pattern, and a second detection pattern. , A second detection state for generating a rotation position detection signal for detecting a circumferential position of rotation of the transmission wheel (620), and transmission to both the first detection pattern and the second detection pattern simultaneously. It is configured to be able to take a third detection state for generating a rotation position detection signal for detecting a circumferential position of rotation of the car (620), and to perform a third detection immediately after detecting the first detection state. An electronic timepiece comprising a control circuit for distinguishing between a case where a state has occurred and a case where a third detection state has occurred immediately after detecting a second detection state. 5. The control circuit according to claim 1, wherein said third detection state occurs immediately after detecting said first detection state.
20) The rotation direction of the transmission wheel (620) is determined to be reverse rotation when the rotation direction of the transmission wheel (620) is determined to be normal rotation and the third detection state occurs immediately after detecting the second detection state. The electronic timepiece according to claim 4, wherein: 6. The circuit board further has a VDD pattern connected to one potential of the power supply, and the contact spring (622) contacts the first detection pattern, the second detection pattern, and the VDD pattern. The first detection has three terminal contact portions that can be connected, and at least one terminal contact portion is in contact with the VDD pattern and another terminal contact portion is in contact only with the first detection pattern. State, the second detection state in which the other terminal contact portions are in contact only with the second detection pattern, and the second detection state in which the other terminal contact portions are in contact with the first detection pattern and the second detection pattern. Contact spring (622) and the first detection state.
The control circuit corrects the rotation direction of the transmission wheel (620) when the third detection state occurs immediately after the detection of the first detection state. Immediately after detecting the second detection state.
5. The electronic timepiece according to claim 4, wherein when the detection state of (b) occurs, the rotation direction of the transmission wheel (620) is determined to be reverse. 7. The contact spring according to claim 2, wherein the contact spring has a terminal contact portion that contacts the pattern, and each of the gaps between the patterns is smaller than the size of the terminal contact portion. An electronic timepiece according to any one of claims 1 to 7. 8. An electronic timepiece having a function of displaying a date, comprising: a time signal generation circuit for counting information relating to time and generating a time signal; and a time display based on a time signal output from the time signal generation circuit. Time display motor drive circuit for outputting a time display motor drive signal for rotating the time motor, a time display motor rotating based on the time display signal output from the time display motor drive circuit, and time display A time display wheel train that rotates based on the rotation of the time motor, a time information display member that displays time information based on the rotation of the time display wheel train, and counts date information to generate a date signal. A date signal generating circuit, and a date for outputting a date display motor drive signal for rotating the date display motor based on the date signal output from the date signal generating circuit. A date display motor that rotates based on a date display signal output from the date display motor drive circuit, a date display wheel train that rotates based on the rotation of the date display motor, and a date. A date information display member that displays date information based on the rotation of the display wheel train, a date feed start detection contact member that detects the start of date feed based on the rotation of the time display wheel train, and a date display member Based on the rotation of the wheel train, a date feed end detection contact member that detects the end point of date feed, and a signal related to the start of day feed output from the date feed start detection contact member, and a date feed end detection contact member An electronic timepiece comprising: a date feed control circuit for controlling the operation of a date display drive circuit for inputting a signal relating to the end of date feed output from the controller and outputting a date display motor drive signal. 9. The electronic timepiece according to claim 8, wherein the date display motor comprises an ultrasonic motor. 10. A date feeding start detecting contact member is provided on a 24-hour wheel which is rotated by rotation of an hour wheel, and a date feeding end detecting contact member is provided on a date wheel which is rotated by rotation of a date display motor. The electronic timepiece according to claim 8, wherein: 11. An electronic timepiece having a function of displaying a date, comprising: a time signal generating circuit for counting information relating to a date and generating a date signal; and an ultrasonic wave based on a date signal output from the time signal generating circuit. An ultrasonic motor drive circuit for outputting an ultrasonic motor drive signal for rotating the motor (132); and an ultrasonic stator having a piezoelectric element bonded thereto. The ultrasonic motor (13) having the ultrasonic rotor (102) frictionally driven by the vibration wave generated in the ultrasonic stator due to expansion and contraction of the
2), a calendar wheel train rotated by the rotation of the ultrasonic rotor (102), and a date finger (10) rotated by the rotation of the calendar wheel train.
8), a date wheel (110) rotated by the rotation of the date finger (108) to display the date, a transmission wheel rotated by the rotation of the ultrasonic rotor (102), and a transmission wheel fixed to the transmission wheel. A contact spring having a conductive property, the contact spring having contact with the contact spring when the contact spring rotates, and a detection pattern provided on a circuit board, the contact spring being in contact with the detection pattern when the contact spring rotates. A control circuit for inputting a rotation position detection signal for detecting a circumferential position of rotation of the transmission wheel output by the detection pattern. 12. An electronic timepiece having a function of displaying a date, comprising: a time signal generating circuit for counting information relating to a date to generate a date signal; and an ultrasonic wave based on a date signal output from the time signal generating circuit. An ultrasonic motor drive circuit for outputting an ultrasonic motor drive signal for operating the motor (132); and an ultrasonic stator having a piezoelectric element bonded thereto. The ultrasonic motor (13) having the ultrasonic rotor (102) frictionally driven by the vibration wave generated in the ultrasonic stator due to expansion and contraction of the
2), a calendar wheel train having a date finger (108) rotated by the rotation of the ultrasonic rotor (102), and a date wheel (110) rotated by the rotation of the date finger (108) to display the date A transmission wheel included in the calendar wheel train and rotated by the rotation of the ultrasonic rotor (102); a contact spring fixed to the transmission wheel and rotating integrally with the transmission wheel; and a conductive contact spring; When the contact spring comes into contact with the detection pattern, the detection pattern is output when the contact spring comes into contact with the detection pattern. An electronic timepiece comprising: a control circuit for inputting a rotational position detection signal for detecting a rotational position. 13. The detection pattern includes two detection patterns capable of simultaneously contacting the contact spring when the contact spring rotates, and the control circuit determines when the two detection patterns are conducted by the contact spring. 13. The control circuit according to claim 11, wherein the control circuit is configured to input a rotation position detection signal for detecting a circumferential position of rotation of the transmission wheel output by each of the two detection patterns. Electronic clock. 14. The detection pattern has two detection patterns that can simultaneously contact the contact spring when the contact spring rotates, and a detection function provided between the two detection patterns. And a control circuit for detecting a circumferential position of the rotation of the transmission wheel output by the two detection patterns when the two detection patterns are conducted by the contact spring. The electronic timepiece according to claim 11, wherein the electronic timepiece is a control circuit that inputs a position detection signal. 15. A first circuit board mounted on a circuit board, the first means being capable of contacting the contact spring when the contact spring rotates.
The contact spring and the first and second detection patterns are located only in the first detection pattern in the circumferential direction of the rotation of the transmission wheel. And a second detection state in which a rotation position detection signal for detecting a circumferential position of the rotation of the transmission wheel is generated only in the second detection pattern. And a third detection state for simultaneously generating a rotation position detection signal for detecting a position in the circumferential direction of rotation of the transmission vehicle in both the first detection pattern and the second detection pattern. And a control for distinguishing between a case where the third detection state occurs immediately after detecting the first detection state and a case where the third detection state occurs immediately after detecting the second detection state. That you have a circuit Claim and symptoms 11 or claim 12
Electronic watch according to the item. 16. When the third detection state occurs immediately after detecting the first detection state, the control circuit determines that the rotation direction of the transmission vehicle is normal rotation and detects the second detection state. 16. The electronic timepiece according to claim 15, wherein when the third detection state occurs immediately thereafter, the rotation direction of the transmission wheel is determined to be reverse rotation. 17. The circuit board further has a VDD pattern connected to one potential of a power supply, and the contact spring can contact the first detection pattern, the second detection pattern, and the VDD pattern. A first detection state in which at least one terminal contact part is in contact with the VDD pattern and another terminal contact part is in contact only with the first detection pattern, A second detection state in which the other terminal contact portions are in contact only with the second detection pattern, and a second detection state in which the other terminal contact portions are in contact with the first detection pattern and the second detection pattern. The contact spring, the first detection pattern, and the second detection pattern are configured so as to be able to take the third detection state, and the control circuit determines the third detection state immediately after detecting the first detection state. When a detection condition occurs, When the third detection state occurs immediately after the second detection state is detected, the rotation direction of the transmission vehicle is determined to be reverse rotation. The electronic timepiece according to claim 15, wherein: 18. The contact spring according to claim 13, wherein the contact spring has a terminal contact portion that contacts the pattern, and each of the gaps between the patterns is configured to be smaller than the size of the terminal contact portion.
An electronic timepiece according to any one of claims 1 to 17. 19. An electronic timepiece having a display wheel, a motor (1) for rotating the display wheel (1120).
130), and a rotation member (1) that rotates based on the rotation of the motor (1130) to rotate the display wheel (1120).
150), rotation detection means (1160, 1174) for generating a signal regarding the state of rotation of the display wheel (1120) based on the rotation of the rotation member (1150), and the rotation detection means (1160, 1174) An electronic timepiece comprising: a motor driving means (1310) for controlling rotation of the motor (1130) based on a rotation signal generated by the motor. 20. The rotation detecting means (1160, 11
74) is provided with a contact spring (1160) provided on the rotating member (1150), and a plurality of contact patterns () for detecting the state of rotation of the rotating member (1150) by contacting the contact spring (1160). 1174). The electronic timepiece according to claim 19, comprising: The motor (1130) is an ultrasonic motor (1130), and the motor driving means (131)
21. The electronic timepiece according to claim 19, wherein (0) includes an ultrasonic motor drive circuit that outputs a drive signal for driving the ultrasonic motor (1130). 22. The display wheel has internal teeth having the number of teeth corresponding to the display contents, and a date jumper for engaging with the internal teeth and defining a position along the rotation direction of the display wheel. (1416), the rotating member includes four date fingers (1408) for rotating the display wheel, and one internal tooth of the display wheel includes a rotation center of the display wheel and the rotating member. The date jumper (1416) is configured to regulate the position along the rotation direction of the display vehicle so as to be located on a straight line (1408A) passing through the rotation center of the motor, and the motor is stopped. 20. The device according to claim 19, wherein two of the four date pawls (1408) are positioned symmetrically with respect to the straight line (1408A) as an axis of symmetry. To claim 21 An electronic timepiece according to any one of the preceding claims. 23. The date finger (1408) can rotate the display wheel when the date finger (1408) is rotated, and can rotate the date wheel even when the display wheel is rotated. 20. The apparatus according to claim 19, wherein the first part (1408) cannot be rotated.
An electronic timepiece according to any one of claims 1 to 21. 24. An electronic timepiece having a date indicator, wherein the date indicator (1410) has 31 internal teeth, and an ultrasonic motor for rotating the date indicator (1410). An intermediate date wheel (1142) that rotates based on the rotation of the ultrasonic motor; and a date that rotates based on the rotation of the intermediate date wheel (1142) to rotate the date wheel (1410). A turning wheel (1406); and a contact spring (11) provided on the date turning wheel (1406).
Circuit board (1170) having a plurality of contact patterns (1174) for detecting the state of rotation of the date wheel (1406) by contacting the contact spring (1160).
A motor drive circuit (1310) for inputting a rotation signal output from the contact pattern (1174) and controlling the rotation of the ultrasonic motor; and two of the internal teeth of the date indicator (1410). A date jumper (141) having a spring portion for engaging a tooth and defining a position along the rotation direction of the date wheel (1410).
6), the date wheel (1406) includes four date fingers (1408g1-1) for rotating the date wheel (1410).
408g4), wherein one internal tooth of the date wheel (1410) is
10) The rotation center (1410k) and the date finger (1)
408g1 to 1408g4) center of rotation (1408c)
The date jumper (1416) is configured to regulate the position along the rotation direction of the date indicator (1410) so as to be located on a straight line (1408A) that passes through the ultrasonic motor. In the state where
Two of the day feeding pawls (1408g1 to 1408g4) (1408g1, 1408g2)
Are positioned so as to be symmetrical with respect to the straight line (1408A) as the axis of symmetry. The internal teeth of the date indicator (1410) and the date finger (140)
8g1 to 1408g4) and the index torque of the ultrasonic motor, the date wheel (1)
410), and the date feed nail (1408g1)
１４０1408g4) cannot be rotated. 25. The date pawl (1408) has a locking tooth profile at the tip.
The electronic timepiece according to any one of claims 1 to 24.