JP6644515B2 - Electronic clock - Google Patents

Description

  The present invention relates to an electronic timepiece.

An electronic timepiece that displays the time by an indicating member such as a plurality of hands, for example, receives a signal, acquires highly accurate time information, and forcibly drives the indicating member based on this time information, so that it is always There is a radio-controlled timepiece in which a highly accurate time is displayed on the indicating member.
Here, in order to drive the pointing member to the correct position, it is necessary to know the current position of the pointing member.
Therefore, a technique for detecting the current pointer position using an optical sensor is known (for example, see Patent Document 1).

JP 2013-25001 A

Here, in the electronic timepiece described in Patent Literature 1, a plurality of wheel trains to be detected for the pointer position are arranged to overlap in the axial direction, and the plurality of overlapping wheel trains are further provided with an LED chip and a photo. Optical elements such as transistors are arranged in an overlapping manner.
Therefore, there is a problem that the thickness in the axial direction, that is, the thickness of the electronic timepiece is increased.
The request to reduce the thickness of the timepiece is not limited to an electronic timepiece that performs the above-described hand detection, but is also true of a general electronic timepiece in which wiring of an electronic circuit is formed.
The present invention has been made in view of the above circumstances, and has as its object to provide an electronic timepiece that can be reduced in thickness.

  The present invention includes: a movement having a battery; and a holding member that holds a driven member toward the inside of the movement, and has a circuit wiring formed on a surface facing the inside of the movement. It is an electronic clock.

  According to the electronic timepiece according to the present invention, the thickness of the electronic timepiece can be reduced.

FIG. 1 is a plan view showing a radio-controlled timepiece which is one embodiment of an electronic timepiece according to the present invention. It is the perspective view which looked at the inside of a radio-controlled timepiece from the dial side, and shows a movement, a date wheel (an example of a driven member), and a date wheel holder (an example of a pressing member). It is principal part sectional drawing of a radio-controlled timepiece. FIG. 3 is a plan view (partially transparent) of the inside of the movement viewed from the side opposite to the dial (hereinafter referred to as the back cover side (of the radio-controlled timepiece)). FIG. 6 is a plan view showing the positional relationship between a step motor, a magnetic field resistant plate, an antenna, and a secondary battery of a movement and wiring of a date indicator holder, as viewed from the back cover side. FIG. 3 is a perspective view showing a step motor, a drive train, a detection unit, and a control unit provided inside the movement. It is a top view which shows a date wheel holder.

Hereinafter, an embodiment of an electronic timepiece according to the invention will be described with reference to the drawings.
<Configuration of radio-controlled watch>
FIG. 1 is a plan view showing a radio-controlled timepiece 1 which is an embodiment of an electronic timepiece according to the present invention. FIG. 2 is a perspective view of the inside of the radio-controlled timepiece 1 as viewed from the dial 2 side. 90, a date wheel 7 (an example of a driven member) and a date wheel holder 8 (an example of a pressing member).

<About dials and pointers>
As shown in FIG. 1, the radio-controlled timepiece 1 of the present embodiment uses an hour hand 4 (an example of an indicating member), a minute hand 5 (an example of an indicating member), and a second hand 6 (an example of an indicator) as shown in FIG. The time is indicated by pointing at “Example of a member”. In addition, a window 2a for date display is opened in the dial 2, and "1", "2",... Displayed on the date dial 7 shown in FIG. , "31", one of the date characters (numerals) 7a is exposed from the window 2a to display the date. In the example of FIG. 1, "29" of the numeral 7a is displayed as the date.

<About solar cells and secondary batteries>
FIG. 3 is a sectional view of a main part of the radio-controlled timepiece 1. As shown in FIG. 3, the radio-controlled timepiece 1 has a solar cell 80 disposed between the dial 2 and the date dial 7, performs photoelectric conversion of light transmitted through the dial 2, and Is stored as electric energy in the secondary battery 92 provided in the battery. The electric energy stored in the secondary battery 92 serves as a power supply for driving the step motors 31 and 41 (see FIG. 4) and the control unit 70 (see FIG. 6) described later.

  FIG. 4 is a plan view of the inside of the movement 90 arranged on the non-conductive resin base plate 91 as viewed from the side opposite to the dial 2 (hereinafter referred to as the back cover side (of the radio-controlled timepiece 1)). FIG. 5 is a diagram showing the positional relationship between the step motors 31 and 41, the anti-magnetic plates 95 a and 96 a, the antenna 93 and the secondary battery 92 of the movement 90, and the wiring 9 a of the date indicator holder 8 from the back cover side. FIG.

<About the antenna>
As shown in FIG. 4, the radio-controlled timepiece 1 includes an antenna 93 inside a movement 90 for receiving a signal (for example, a standard radio wave) including time information transmitted from the outside, and respective hands (hour hand 4, minute hand 4). 5. Step motors 31 and 41 for driving the second hand 6) and drive trains 10 and 20 are provided. Further, as shown in FIG. 3, the radio-controlled timepiece 1 includes a circuit board 94 formed of glass epoxy on the opposite side of the movement 90 from the dial 2.
The circuit board 94 includes phototransistors 52 and 62 for detecting light, and ICs and the like for controlling the step motors 31 and 41 so as to indicate the correct time with each pointer based on radio waves received by the antenna 93. The control unit 70 is provided. The secondary battery 92 and each of the step motors 31 and 41 are electrically connected to the wiring formed on the circuit board 94.

<About anti-magnetic plate>
The radio-controlled timepiece 1 includes the step motors 31 and 41 in the movement 90 between the step motors 31 and 41 and the main plate 91 in the thickness direction of the radio-controlled timepiece 1 as shown in FIG. On the dial 2 side, there are provided anti-magnetic plates 95a and 96a for protecting from an external magnetic field, and as shown in FIG. 3, on the circuit board 94 side of the movement 90, there are provided anti-magnetic plates 95b and 96b for protecting from an external magnetic field.

<Step motor and drive train>
FIG. 6 is a perspective view showing the step motors 31 and 41, the drive trains 10 and 20, the detection units 50 and 60, and the control unit 70 provided inside the movement 90.
As shown in FIG. 6, the movement 90 includes the hands (hour hand 4, minute hand 5, and second hand 6), step motors 31 and 41 for driving the date indicator wheel, drive wheel trains 10 and 20, and radio waves received by the antenna. The control unit 70 includes an IC for controlling the step motors 31 and 41 so as to indicate a correct time based on the time.

Here, the first step motor 31 drives the first drive wheel train 10. The first drive wheel train 10 includes a first intermediate wheel 11, a second intermediate wheel 12, a third intermediate wheel 13, and an hour wheel 14, and controls the driving force of the first step motor 31 The first hour wheel 11, the second hour wheel 12, the third hour wheel 13, and the hour wheel 14 are transmitted in this order, and the hour hand 4 fixed to the hour wheel 14 is rotated.
The second intermediate wheel 12 has one detection hole 12a formed through the gear in the axial direction. The second hour intermediate wheel 12 is arranged at a position that does not overlap with the hour wheel 14 in a plan view (a surface viewed in a direction perpendicular to the axial direction of the drive trains 10 and 20).

The hour wheel 14 has eleven detection holes 14a formed through the gear in the axial direction. The eleven detection holes 14a are formed in the circumferential direction around the rotation center C of the hour wheel 14 at an angular interval of 30 [degrees]. The angle interval between the two detection holes 14a, 14a at both ends of the eleven detection holes 14a is 60 [degrees].
The control unit 70 controls the driving of the first step motor 31 so as to rotate the hour wheel 14 around the axis once in 12 hours. At this time, the second hour intermediate wheel 12 makes one rotation around the axis in one hour.

On the other hand, the second step motor 41 drives the second drive train 20. The second drive wheel train 20 includes a fifth wheel & pinion 21, a fourth wheel & pinion 22, a third wheel & pinion 23, and a second wheel & pinion 24, and supplies the driving force of the second step motor 41 to the fifth wheel & pinion 21, The second wheel 22, the third wheel 23, and the second wheel 24 are transmitted in this order, and the second hand 6 fixed to the fourth wheel 22 and the minute hand 5 fixed to the second wheel 24 are rotated.
The fourth wheel & pinion 22 is formed with one detection hole 22a penetrating the gear in the axial direction, and the third wheel & pinion 23 is provided with a detection hole 23a penetrating the gear in the axial direction and 180 [degree] across the rotation center. The second center wheel & pinion 24 is formed with one detection hole 24a which penetrates the gear in the axial direction.

The two detection holes 23a of the third wheel & pinion 23 are circumferentially longer than the other detection holes 22a and 24a.
Further, the control unit 70 rotates the fourth wheel & pinion 22 once around the axis in one minute, rotates the third wheel & pinion once around the axis in eight minutes, and turns the second wheel & pinion 24 around the axis one hour in one hour. The drive of the second step motor 41 is controlled so as to rotate. At this time, the second hour intermediate wheel 12 makes one rotation around the axis in one hour.

As shown in FIG. 3, the center wheel & pinion 24, the center wheel & pinion 22, and the hour wheel & pinion 14 have the same rotation center C and are axially overlapped. As shown in FIG. 1, the rotation center C is the rotation center of the hour hand 4, minute hand 5 and second hand 6, and is the center of the radio-controlled timepiece 1.
The detection hole 22a of the fourth wheel & pinion 22, the detection hole 23a of the third wheel & pinion 23, the detection hole 24a of the second wheel & pinion 24, and the detection hole 14a of the hour wheel & pinion 14 The positions in the rotation direction are adjusted so that the positions in the steps 1 and 2 coincide and overlap in the axial direction.

Since the eleventh detection hole 14a of the hour wheel 14 is formed, the hour hand 4 fixed to the hour wheel 14 indicates that the hour hand 4 is set at 10 hours every 1 hour from the time when 0:00 (12:00) 00:00:00 is indicated. Adjustment is made so that the detection holes 14a, 22a, 23a, and 24a overlap in the axial direction corresponding to the time (22:00) 00:00.
However, since this is a structure for detecting the rotational position of the hour wheel 14 when the hour wheel 14 is rotated once by the first step motor 31, the hour hand 4 is set to 0:00 (12:00) 00 minutes. The detection holes 14a, 22a, 23a, and 24a are adjusted so as to overlap in the axial direction from the time when 00 seconds are designated to the time of 10:00 (22:00) 00 minutes 00 seconds every hour. Not limited.

  Accordingly, the detection holes 14a, 22a, 23a, 24a are provided every hour from when the hour hand 4 indicates 1 o'clock (13:00) 00:00:00, to when 1 hour (23:00) 00:00:00. May be adjusted so as to overlap in the axial direction, or 9:00 (21:00) 00:00:00 every hour from when the hour hand 4 indicates 23:00 (11:00) 00:00:00. Until this time, the detection holes 14a, 22a, 23a, 24a may be adjusted so as to overlap in the axial direction.

<Arrangement in the movement>
As shown in FIG. 4, the inside of the movement 90 is provided with a winding stem 97a in the direction of 3 o'clock of the dial 2 in plan view from the back cover side. A detection switch 97b for detecting the rotation direction of the winding stem 97a is provided on the leading end of the winding stem 97a inside the movement 90. The detection switch 97b is electrically connected to the circuit board 94, and the control unit 70 drives the step motors 31 and 41 so as to rotate the hands in a rotation direction corresponding to the rotation direction of the winding stem 97a detected by the detection switch 97b. Control.
As described above, in the present embodiment, a system that detects the rotation direction of the winding stem 97a and electromagnetically drives the hands with a motor based on the detected rotation direction to correct the indicated position of the hands is described in the present embodiment. Called.

That is, the radio-controlled timepiece 1 does not include a wheel train mechanism for correcting the position of the hands, which mechanically transmits the rotation operation input to the winding stem 97a to the hands. As a result, the radio-controlled timepiece 1 having the electromagnetic correction system is provided with a wheel train for correcting the position of the hands from the leading end of the winding stem 97a on the inner side of the movement 90 to the rotation center C of the radio-controlled timepiece 1. There is space due to the lack of a mechanism.
On the other hand, a back turning mechanism 97c made of metal is arranged around the end of the winding stem 97a on the inner side of the movement 90.
In addition, a secondary battery 92 is disposed in the back-turn mechanism 97c at a position around 11 o'clock adjacent to the radio-controlled timepiece 1 in the circumferential direction.

  Then, the antenna 93 is arranged at a position around 7:30, which is a diagonal position with respect to the back rotation mechanism 97c and the secondary battery 92 with respect to the rotation center C which is the center of the radio-controlled timepiece 1. Have been. Since the receiving performance of the antenna 93 is reduced due to the proximity of the metal parts, the antenna 93 is arranged in the movement 90 at a position far away from the backing mechanism 97 c and the secondary battery 92 which are typical metal parts. Have been.

  Further, a first drive wheel train 10 and a second drive wheel train 20 for driving the hands are arranged in a central portion of a movement 90 which is a rotation center C of the radio-controlled timepiece 1. The first step motor 31 that drives the first drive wheel train 10 is disposed outside the first drive wheel train 10 at a position around 11:00 adjacent to the secondary battery 92. On the other hand, the second step motor 41 that drives the second drive wheel train 20 is disposed outside the second drive wheel train 20 at a position around 5 o'clock adjacent to the counter-rotating mechanism 97c.

<About date wheel and date wheel holding>
The date indicator 7 is formed in an annular shape as shown in FIG. 2, and date numbers 7a from “1” to “31” are displayed side by side in the circumferential direction. Note that, in FIG. 2, only some of the 31 numbers 7a from “1” to “31” are displayed, and the other remaining numbers 7a are omitted. The date indicator 7 is linked to the hour hand 4 and is rotationally driven in a circumferential direction by a date indicator wheel (not shown). The date driving wheel is driven by a first drive train 10 shown in FIG. 3 provided inside the movement 90.

FIG. 7 is a plan view showing the date indicator holder 8.
As shown in FIG. 7, the inner peripheral edge of the date indicator 7 is formed in a disk shape, and the date dial 2 is fixed to a main plate 91 of the movement 90 by a date indicator holder 8 (an example of a pressing member). Has been suppressed to fall to the side of. That is, the date indicator holder 8 presses the date indicator 7 toward the inside of the movement 90.

The date wheel holder 8 is made of resin and is a so-called MID (Molded Interconnect Device). The MID is a molded component in which a circuit is formed by plating or a metal film on the surface of a molded product in which a resin or ceramic is formed using a mold.
The date indicator holder 8, which is the MID in the present embodiment, has a copper plating electronic circuit wiring 9a formed on a surface 8a facing the inside of the movement 90, and LED chips 51, 61 which are electrically connected to the wiring 9a. Has been implemented. The wiring 9a is not limited to copper plating.

  In a plan view, the position where the LED chip 51 is mounted is a position where the detection hole 12a of the second hour intermediate wheel 12 overlaps once during one rotation (corresponding to one hour). At the position where the LED chip 51 and the detection hole 12a overlap, the phototransistor 52 mounted on the circuit board 94 (see FIG. 3) arranged on the back cover side is also arranged as shown in FIG. In addition, a hole (not shown) penetrating in the axial direction is also formed in the base plate 91.

The light emitted by the LED chip 51 passes through the detection hole 12a and the hole of the base plate 91 only once during one rotation of the second intermediate wheel 12 disposed between the LED chip 51 and the phototransistor 52. The rotation position of the second hour intermediate wheel 12 can be detected by being detected by the phototransistor 52 by passing through.
The LED chip 51 and the phototransistor 52 constitute a first detection unit 50 that optically detects the rotational position of the first drive wheel train 10, that is, the rotational position of the hour hand 4.

  The position where the LED chip 61 is mounted in a plan view is a position where the detection holes 14a, 22a, 23a and 24a overlap once during the rotation of the center wheel & pinion 24 once (corresponding to one hour). At positions where the LED chip 61 and the detection holes 14a, 22a, 23a and 24a overlap, the phototransistors 62 mounted on the circuit board 94 arranged on the back cover side are also shown in FIGS. As shown in FIG. 3, a hole 91a penetrating in the axial direction is formed in the main plate 91 as well.

  Then, the detection holes 14 a, 22 a, 23 a, 24 a of the hour wheel 14, the second wheel & pinion 23, the third wheel & pinion 23, and the hole 91 a of the main plate 91 which are arranged between the LED chip 61 and the phototransistor 62. Are overlapped only once an hour in the axial direction, and the light emitted by the LED chip 61 is detected by the phototransistor 62 through the detection holes 14a, 22a, 23a, 24a and the hole 91a, whereby the second light is emitted. The rotational position of the drive wheel train 20 can be detected.

The LED chip 61 and the phototransistor 62 constitute a second detection unit 60 that optically detects the rotational position of the second drive wheel train 20, that is, the rotational positions of the minute hand 5 and the second hand 6.
The control unit 70 controls the stepping motors 31 and 41 based on the radio wave received by the antenna 93 so that the positions of the hands detected by the phototransistors 52 and 62 indicate the correct time.

<About wiring>
The wiring 9a formed on the date indicator holder 8 is connected to the circuit board 94 on the back cover side facing the date indicator holder 8 at the three terminal portions 3b shown in FIGS. The formed wirings are electrically connected to each other by metal connection springs 98 (an example of conductive members). Thereby, the electric power of the secondary battery 92 conducted to the circuit board 94 side is supplied to the respective LED chips 51 and 61 through the connection spring 98 and the wiring 9a of the date indicator holder 8 under the control of the control unit 70, and the respective LEDs are controlled. The chips 51 and 61 can emit light.
The member that conducts the wiring 9a of the date wheel holder 8 and the wiring formed on the circuit board 94 is not limited to the connection spring 98 described above, and may be a conductive wire or a simple rigid conductive member. You may.

However, when the connection spring 98 is applied as the conductive member, the connection spring 98 is disposed between the date wheel holder 8 and the circuit board 94, and the wiring 9a of the connection spring 98 and the date wheel holder 8 and the circuit board The wiring 94 makes strong contact with the elastic force of the connection spring 98. Therefore, unlike the case where a conductive wire or a rigid conductive member is used as the conductive member, it is not necessary to join both ends of the conductive member to the wiring 9a of the date indicator holder 8 and the wiring of the circuit board 94 in advance.
Therefore, when the connection spring 98 is applied as the conductive member, the assembling workability in the process of assembling the movement 90 can be improved.

  The connection spring 98 has its natural length (the length of the connection spring 98 when no compressive load is applied in the axial direction) determined by the distance between the wiring 9a of the date wheel holder 8 and the wiring of the circuit board 94. And the length of the connection spring 98 when the connection spring 98 is most compressed by the compressive load is set shorter than the distance between the wiring 9a of the date wheel holder 8 and the wiring of the circuit board 94. Cost.

As shown in FIG. 5, the three connection springs 98 are connected to two wirings 9a, 9a which are respectively connected to the two LED chips 51, 61, and are connected to the two LED chips 51, 61 in common. And three wirings 9a.
As shown in FIG. 4, the three connection springs 98 are provided for correcting the position of the hands formed between the end of the winding stem 97a on the inner side of the movement 90 and the rotation center C of the radio-controlled timepiece 1. Is arranged in the space due to the absence of the gear train mechanism.

Further, as shown in FIG. 5, a part of the wiring 9a is formed so as to overlap with the secondary battery 92 in a plan view of the radio-controlled timepiece 1. However, since the secondary battery 92 is disposed on the base plate 91, the wiring 9a does not come into contact with the secondary battery, and the wiring 9a contacts the portion of the base plate 91 on which the secondary battery 92 is disposed. It is.
As shown in FIG. 5, the wiring 9a is formed so as not to overlap with the antenna 93 in a plan view of the radio-controlled timepiece 1.

  More specifically, as shown in FIG. 5, a region (I) where the antenna 93 is disposed and a region (II) where the antenna 93 is not disposed, which are straight lines (broken lines) passing through the rotation center C of the radio-controlled timepiece 1. The wiring 9a is formed in the area (II) where the antenna 93 is not arranged.

Also, as shown in FIG. 5, the wiring 9a slightly overlaps the anti-magnetic plate 95a in plan view of the radio-controlled timepiece 1, but most of the wiring 9a is substantially separated from the anti-magnetic plates 95a and 96a and almost apart therefrom. It is formed with.
The control unit 70 controls the stepping motors 31 and 41 based on the radio wave received by the antenna 93 so that the positions of the hands detected by the phototransistors 52 and 62 indicate the correct time.

<Operations and effects of radio-controlled watches>
According to the radio-controlled timepiece 1 configured as described above, it is necessary to further arrange a circuit board (a glass epoxy board or a flexible board) on which the wiring 9a is formed between the date indicator holder 8 and the movement 90. Absent. Therefore, the radio-controlled timepiece 1 is thinner than a radio-controlled timepiece in which a circuit board (a glass epoxy board or a flexible board) in which the wiring 9a is formed between the date indicator holder 8 and the movement 90 is arranged. be able to.

  The radio-controlled timepiece 1 of the present embodiment employs a date wheel 7 as an example of a driven member. The driven member may be, for example, an annular, fan-shaped or arc-shaped month. Display members such as date wheels that display the day and day of the week, wheel train members that drive hands such as the hour hand 4, minute hand 5, and second hand 6, speed control mechanisms such as the balance with hairspring and ankle, and escape mechanisms are used. Can also.

Here, the display member may be driven as, for example, rotation or swing (reciprocal vibration, flyback operation, or the like).
As the holding member in the present invention, for example, in addition to the date wheel holder, a display unit holder for holding the display member, a train wheel holder for holding the wheel train member, a balance wheel balancer, an ankle holder, and the like can be applied.
Note that the pressing member may form a part of the movement.
The holding member has a non-conductive property because the wiring for the circuit is formed.

Further, in the radio-controlled timepiece 1 of the present embodiment, as shown in FIG. 3, a secondary battery 92 is disposed on a resin base plate 91. Here, the secondary battery 92 is particularly thick among the components of the movement 90, and in order to avoid the thickness of the radio-controlled timepiece 1 being increased, the secondary battery 92 is viewed in a plan view of the radio-controlled timepiece 1. There are no other conductive parts that are placed on top of each other.
On the other hand, the wiring 9a formed on the date wheel holder 8 is disposed so as to overlap with the secondary battery 92 in a plan view with the ground plate 91 (see FIG. 3) interposed therebetween (in FIG. 5, the wiring 9a overlaps with the secondary battery 92). With the wiring 9a) indicated by the broken line, a space overlapping the secondary battery 92 in plan view can be effectively used. In addition, even if the MID wiring 9a without a resist contacts the ground plate 91 made of resin, an electrical short circuit does not occur.

  Further, in the radio-controlled timepiece 1, as shown in FIG. 4, the conductive secondary battery 92 is separated from the antenna 93 without overlapping in a plan view, as shown in FIG. It is located far away. Specifically, as shown in FIG. 5, the wiring 9a is arranged in a region (I) where the antenna 93 is arranged in a straight line passing through the center (rotation center C) of the radio-controlled timepiece 1, and the antenna 93 is arranged. When divided into the area (II) on the side where no antenna is provided, all the wirings 9a are formed in the area (II) on the side where the antenna 93 is not arranged.

Since the wiring 9a is formed so as to overlap the secondary battery 92 in a plan view, the wiring 9a can be automatically arranged at a position far from the antenna 93, and the metal wiring 9a is It is also possible to prevent the reception performance of the antenna 93 from being lowered.
Moreover, since all of the wirings 9a are arranged in the area (II) on the side where the antenna 93 is not arranged, a sufficient distance from the antenna 93 can be ensured, and the receiving performance of the antenna 93 deteriorates. Can be sufficiently prevented.

  If the wiring 9a is formed so as to be overlapped in plan view between the antenna 93 and the dial 2 of the radio-controlled timepiece 1, the wiring 9a is ), It is possible to prevent the wiring 9a from becoming a shielding object by forming the wiring 9a at a distance from the antenna 93 in plan view.

As shown in FIG. 5, the radio-controlled timepiece 1 has an area (I) in which the wiring 9a is arranged in a straight line (indicated by a dashed line) passing through the center of rotation C in plan view of the radio-controlled timepiece. When the wiring 9a is divided into the area (II) where the antenna 93 is not arranged and the wiring 9a is formed in the area (II) where the antenna 93 is not arranged, the wiring 9a can be arranged at a position far from the antenna 93. This can prevent the metal wiring 9a from deteriorating the reception performance of the antenna 93.
The radio-controlled timepiece 1 of the present embodiment does not include the antenna 93 with an auxiliary plate that extends the length of the antenna 93 in order to improve the reception performance of the antenna 93. The antenna in the electronic timepiece of the present invention, including the auxiliary plate.

In the radio-controlled timepiece 1, as shown in FIG. 3, the detection holes 24a, 23a, 22a, 14a of the center wheel & pinion 24, the center wheel & pinion 23, the center wheel & pinion 22, and the hour wheel 14 which are overlapped in the axial direction are directly connected. The position of the hands (minute hand 5, second hand 6) is detected by the second detection unit 60 detecting that the hands are aligned on the line. The position of the hands (hour hand 4) is detected by detecting the detection hole 12a of the second hour intermediate wheel 12 with the first detection unit 50.
Therefore, as for the second detection unit 60, the LED chip 61 and the phototransistor 62 are located outside the overlap of the second wheel & pinion, the third wheel & pinion, the fourth wheel & pinion and the hour wheel as shown in FIG. Each is arranged.

  For this reason, the portion where the LED chip 61, the hour wheel 14, the second wheel & pinion 24, the third wheel & pinion 23, the fourth wheel & pinion 22, and the phototransistor 62 overlap on a straight line has a large thickness. However, the LED chip 61 is not mounted on a glass / epoxy substrate different from the date indicator holder 8, but is mounted on the existing date indicator holder 8. Therefore, since it is not necessary to provide the another glass / epoxy substrate for mounting the LED chip 61 on the above-mentioned overlapping portion, the thickness of the radio-controlled timepiece 1 is reduced by the thickness not provided with the glass / epoxy substrate. Can be thin.

The radio-controlled timepiece 1 also includes an electromagnetic correction system that detects the rotation direction of the winding stem 97a and electromagnetically drives and corrects the hands based on the detected rotation direction. Since no row mechanism is provided, there is a space between the end of the winding stem 97a on the inner side of the movement 90 and the rotation center C of the radio-controlled timepiece 1.
Then, three connection springs 98 for conducting the wiring 9a of the date wheel holder 8 arranged on the side of the dial 2 of the movement 90 and the wiring formed on the circuit board 94 arranged on the back cover side of the movement 90. Can be arranged in the space between the tip of the winding stem 97a and the rotation center C obtained by the configuration employing the electromagnetic correction system.

Further, in the radio-controlled timepiece 1, as shown in FIG. 5, the wiring 9a formed on the date indicator holder 8 is formed at a position substantially apart from the magnetically deficient plates 95a and 96b in plan view. It is possible to substantially prevent the wiring 9a from being electrically short-circuited with the anti-magnetic plates 95a and 96a.
In the example shown in FIG. 5, a very small portion of the wiring 9a is arranged so as to overlap with the anti-magnetic plate 95a in plan view (in FIG. 5, the wiring 9a which overlaps with the anti-magnetic plate 95a and is indicated by a broken line). It is preferable that the entire wiring 9a is formed at a position completely separated from the anti-magnetic plates 95a and 96a from the viewpoint of completely preventing a short circuit.

<Modification of Configuration>
The radio-controlled timepiece 1 of the present embodiment has the date wheel holder 8 and the LED chips 51 and 61 mounted thereon together with the wiring 9a. However, the electronic timepiece according to the present invention has only the wiring formed on the holding member. Or an optical element other than the LED chip 51 (for example, a phototransistor) may be mounted. May be implemented.

  Although the above embodiment is the radio-controlled timepiece 1, the electronic timepiece according to the present invention is not limited to the radio-controlled timepiece. That is, the electronic timepiece according to the present invention is applied to all electronic timepieces that detect the position of a pointing member such as a hand. For example, an electronic timepiece that corrects a handed instruction based on a signal from a GPS or an automatic time correction It can be applied to other electronic watches with or without functions.

1 Radio-controlled watches (an example of electronic watches)
7 Date indicator (an example of a driven member)
8 Date wheel holder (an example of holding member)
8a Surface 9a facing the inside of the movement Wiring 51, 61 LED chip (an example of an optical element)
90 Movement 92 Secondary battery C Rotation center

Claims (5)

A movement having a battery,
A member to be driven is pressed toward the inside of the movement, and a pressing member on which a wiring of a circuit is formed on a surface facing the inside of the movement,
The movement has a train object and ing for detecting the position of the pointing member of the electronic timepiece optically,
An optical element connected to the wiring and detecting a position of the pointing member is mounted on the pressing member,
The optical element is mounted in an arrangement which overlaps previously Kiwa column axially,
An electromagnetic correction system that detects a rotation direction of the winding stem, electromagnetically drives a pointing member of the electronic timepiece based on the detected rotation direction, and corrects a pointing position of the pointing member; A conductive member for electrically connecting the wiring of the pressing member and the wiring of the circuit board arranged to face the pressing member,
The electronic timepiece, wherein the conductive member is disposed in a space between a tip of the winding stem on an inner side of the movement and a center of the electronic timepiece.   The electronic timepiece according to claim 1, wherein at least a part of the wiring is formed so as to overlap with the battery in a plan view of the electronic timepiece. The movement has an antenna that receives an external signal,
The electronic timepiece according to claim 1, wherein the wiring is formed so as to be separated from the antenna in a plan view of the electronic timepiece. The movement has an antenna that receives an external signal,
In a plan view of the electronic timepiece, a straight line passing through the center of the electronic timepiece, when divided into an area where the antenna is arranged and an area where the antenna is not arranged, the wiring is formed in an area where the antenna is not arranged. The electronic timepiece according to claim 1, wherein the electronic timepiece is formed. The movement has a motor and an anti-magnetic plate that protects the motor from an external magnetic field,
The wiring in a plan view of the electronic timepiece, electronic timepiece according to any one of claims 1 or et 4 formed by the anti-magnetic shield plate and spaced substantially disposed.