Electronic watch

Abstract

To provide a small and thin electronic watch with improved freedom in design variations.SOLUTION: An electronic watch comprises: a bottom board; a dial plate; a tabular antenna arranged between the bottom board and the dial plate; a center pointer wheel; a plurality of small pointer wheels; a plurality of motors arranged opposite the dial plate of the bottom board and driving the center pointer wheel and the small pointer wheels; and a battery. The bottom board is configured such that the center pointer wheel and the small pointer wheels can be arranged on three sites different from an arrangement site for the center pointer wheel in plan view. The antenna is provided with an open hole for inserting a center pointer shaft and a small pointer shaft. The small pointer wheels are selectively arranged on at least two sites of the three sites. In plan view, the battery is arranged at a position not overlapping with three sites on which the plurality of motors, the center pointer wheel and the small pointer wheels can be arranged. The plane center of the battery is positioned between a virtual line connecting the plane center of the dial plate and 10-o'clock position and a virtual line connecting the plane center of the dial plate and 11-o'clock position.SELECTED DRAWING: Figure 5

Description

Technical Field

[0001] The present invention relates to an electronic clock, and more particularly to an antenna for receiving radio waves and an electronic clock including a center hand and a plurality of sub-hands.

Background Art

[0002] In an electronic clock having a patch antenna for receiving radio waves transmitted from a positioning information satellite such as GPS (Global Positioning System), an electronic clock capable of realizing a plurality of designs with different positions of small windows (sub-dials) is known (Patent Document 1).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] Since the patch antenna has a large thickness dimension among clock parts, it is difficult to arrange a display wheel to which a pointer is attached at the location where the patch antenna is arranged. For this reason, in the electronic clock of Patent Document 1, there are restrictions on the positions where small windows can be arranged, and there is a problem that it is difficult to derive and develop the arrangement positions of the small windows. For this reason, in an electronic clock, it has been desired to improve the degree of freedom in design variations while maintaining a small and thin shape.

Means for Solving the Problems

[0005] The electronic clock of the present disclosure includes a base plate, a dial plate disposed on one side of the base plate, a flat antenna disposed between the base plate and the dial plate, a center hand wheel having a center hand shaft to which a center hand is attached, a plurality of small hand wheels having small hand shafts to which small hands are attached, a plurality of motors disposed on the side of the base plate opposite to the dial plate and driving the center hand wheel and the plurality of small hand wheels respectively, and a battery disposed on the side of the base plate opposite to the dial plate and supplying power to drive the plurality of motors. The base plate is formed so as to be able to dispose the center hand wheel, and in a plan view seen from a direction orthogonal to the surface of the dial plate, is formed so as to be able to dispose the small hand wheels at three positions different from the position where the center hand wheel is disposed. The antenna is respectively formed with through holes through which the center hand shaft and the small hand shaft can be inserted. The small hand wheels are selectively disposed at at least two of the three positions. The battery is disposed at a position that does not overlap with the plurality of motors, the center hand wheel, and the three positions where the small hand wheels can be disposed in the plan view, and the planar center of the battery is located between a virtual line connecting the planar center of the dial plate and the 10 o'clock position and a virtual line connecting the planar center of the dial plate and the 11 o'clock position.

Brief Description of the Drawings

[0006]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Figure 11

Figure 12

Mode for Carrying Out the Invention

[0007] This embodiment is an electronic clock 1 capable of realizing the first electronic clock 1A shown in FIG. 1 and the second electronic clock 1B shown in FIG. 2. In the electronic clocks 1A and 1B, the positions of the small windows (sub-dials) are different. For this reason, in the electronic clocks 1A and 1B, although some configurations are different, the basic configuration of the movement is common.

[0008] A plurality of figures including FIG. 1 and FIG. 2 show an XYZ coordinate system. The X-axis is an axis parallel to the mounting surface on which the electronic clock 1 is mounted and is also an axis parallel to the line connecting the 3 o'clock position and the 9 o'clock position of the electronic clock 1. The X1 direction is the direction from the 9 o'clock position toward the 3 o'clock position, and the X2 direction is the direction from the 3 o'clock position toward the 9 o'clock position. The Y-axis is an axis parallel to the mounting surface on which the electronic clock 1 is mounted and is also an axis parallel to the line connecting the 12 o'clock position and the 6 o'clock position of the electronic clock 1. The Y1 direction is the direction from the 6 o'clock position toward the 12 o'clock position, and the Y2 direction is the direction from the 12 o'clock position toward the 6 o'clock position. The Z-axis is an axis perpendicular to the mounting surface. The Z1 direction is the direction upward from the mounting surface, and the Z2 direction is the direction downward from the mounting surface. For this reason, the Z1 direction corresponds to the front side or the upper side. The Z2 direction corresponds to the back side or the lower side.

[0009] The electronic timepieces 1A and 1B of the present embodiment are configured to include a planar antenna 40 shown in FIGS. 3 and 4 so as to receive satellite signals from positioning satellites such as a plurality of GPS satellites and quasi-zenith satellites orbiting in a predetermined orbit above the earth, acquire satellite time information, and correct internal time information.

[0010] As shown in FIG. 1, the first electronic timepiece 1A includes an outer case 2, a crown 3 for external operation, and two buttons 4A and 4B. Inside the outer case 2, a dial 5A, a movement 20A, etc. are housed as will be described later. The crown 3 is provided in the 3 o'clock direction of the dial 5A in a plan view, and the buttons 4A and 4B are provided in the 2 o'clock direction and the 4 o'clock direction, respectively. The first electronic timepiece 1A includes an hour hand 61, a minute hand 62, a second hand 63 which are center hands 6, a first sub-hand 71, a second sub-hand 72, a third sub-hand 73, a fourth sub-hand 74, and a date wheel 50.

[0011] The dial 5A is formed in a disk shape from a non-conductive member such as polycarbonate. A central through-hole (not shown) penetrating the dial 5A is formed at the plane center of the dial 5A, and a center hand shaft 60 to which the center hand 6 is attached is disposed in the central through-hole. The dial 5A has three small windows (sub-dials). That is, as shown in FIG. 1, the dial 5A is provided with a circular first small window 71A and a first sub-hand 71 in the 6 o'clock direction, a circular second small window 72A and a second sub-hand 72 in the 9 o'clock direction, and a circular third small window 73A and a third sub-hand 73 in the 12 o'clock direction with respect to the plane center where the center hand shaft 60 is provided. A rectangular date window 51 is provided in the direction between 4 o'clock and 5 o'clock (4.5 o'clock direction) with respect to the plane center of the dial 5A. A date wheel 50 which is a calendar wheel is disposed on the back side of the dial 5A, and the date wheel 50 is visible through the date window 51. A circular fourth small window 74A and a fourth sub-hand 74 are provided between the plane center of the dial 5A and the date window 51. Therefore, in the dial 5A, in addition to the central through-hole formed at the center of the plane through which the center pivot 60 is inserted, there are four through-holes (not shown in the figure) through which the pivot shafts of the first small hand 71, the second small hand 72, the third small hand 73, and the fourth small hand 74 are inserted, and a date window 51 is formed.

[0012] The hour hand 61, the minute hand 62, and the second hand 63 indicate local time during normal use. Also, the second hand 63 functions as a second chronograph hand in the chronograph mode. The first small hand 71 is a home time hand that indicates the time of the time zone preset by the user, and is composed of a home time hour hand 711 and a home time minute hand 712. The home time hour hand 711 and the home time minute hand 712 function as an hour chronograph hand and a minute chronograph hand, respectively, in the chronograph mode. Note that the home time hour hand 711 is a 12-hour hand and makes one revolution in 12 hours. The second small hand 72 is a mode hand that indicates various information. The information indicated by the second small hand 72 can be set as appropriate. For example, it displays the day of the week, the setting of daylight saving time, a power indicator indicating the remaining amount of the secondary battery 24, an in-flight mode that prohibits reception, a time measurement mode that receives GPS time information and corrects the internal time, and the settings of each mode of a positioning mode that receives GPS time information and orbit information and corrects the internal time and the time zone. The third small hand 73 is a 1 / 20 second chronograph hand. The fourth small hand 74 is an AM / PM hand that indicates whether the home time indicated by the first small hand 71 is in the morning or afternoon.

[0013] These hour hand 61, minute hand 62, second hand 63, first small hand 71 (home time hour hand 711, home time minute hand 712), second small hand 72, third small hand 73, and date wheel 50 are driven via a motor and a wheel train described later. The fourth small hand 74 is not driven by an independent motor, but is driven in conjunction with the home time hour hand 711 of the first small hand 71 by the motor and the wheel train that drive the first small hand 71.

[0014] As shown in Fig. 2, the second electronic clock 1B includes an exterior case 2, a bezel 3, and buttons 4A and 4B, just like the first electronic clock 1A. Inside the exterior case 2, a dial 5B, a movement 20B, etc. are housed as will be described later. The second electronic clock 1B includes an hour hand 61, a minute hand 62, a second hand 63, which are center hands 6, a first subsidiary hand 71, a second subsidiary hand 72, a third subsidiary hand 73, and a date wheel 50, just like the first electronic clock 1A.

[0015] The dial 5B is formed in a disc shape from a non-conductive member such as polycarbonate, just like the dial 5A. A central through-hole (not shown in detail) through which the center hand shaft 60 is inserted is formed at the center position of the plane of the dial 5B. The dial 5B has three small windows (sub-dials). That is, as shown in Fig. 2, a circular first small window 71A and a first subsidiary hand 71 are provided in the 6 o'clock direction with respect to the center of the plane of the dial 5B where the center hand shaft 60 is provided, a circular second small window 72A and a second subsidiary hand 72 are provided in the 9 o'clock direction, and a circular third small window 73B and a third subsidiary hand 73 are provided in the 3 o'clock direction.

[0016] The hour hand 61, minute hand 62, and second hand 63 provided in the second electronic clock 1B have the same functions and layout as those in the first electronic clock 1A. The first subsidiary hand 71 includes a home time hour hand 711 and a home time minute hand 712, just like the first electronic clock 1A. However, the home time hour hand 711 is a 24-hour hand and makes one full rotation in 24 hours. Therefore, the second electronic clock 1B does not have a fourth subsidiary hand 74 that functions as an AM / PM hand. The second subsidiary hand 72 functions as a 1 / 20 second chronograph hand, just like the third subsidiary hand 73 of the first electronic clock 1A. The third subsidiary hand 73 functions as a mode hand, just like the second subsidiary hand 72 of the first electronic clock 1A.

[0017] In addition to the central through-hole formed at the center of the plane of the dial 5B, three through-holes (not shown in detail) through which the shafts of the first subsidiary hand 71, the second subsidiary hand 72, and the third subsidiary hand 73 are inserted and a date window 51 are formed in the dial 5B.

[0018] [Movement of the First Electronic Watch] The movement 20A incorporated in the exterior case 2 of the first electronic watch 1A will be described with reference to FIGS. 3 to 9. Note that, although the surface of the watch movement may be described as the side arranged on the back cover side and the back surface as the side arranged on the dial side, in the present embodiment, as described above, the dial side in the Z1 direction is described as the front side or the upper side, and the back cover side in the Z2 direction is described as the back surface side or the lower side. As shown in FIGS. 3 and 4, the movement 20A includes a floor board 21, a wheel train support 22, a driving body 100 supported by the floor board 21 and the wheel train support 22, a circuit board 23, a secondary battery 24, a solar cell panel 25, a magnetic shield plate 26, a circuit retainer 27, and a planar antenna 40. The floor board 21 is formed of a non-conductive member such as plastic. On the back cover side, that is, the back surface side of the floor board 21, as shown in FIGS. 4 and 5, a plurality of motors and wheel trains constituting the driving body 100 are arranged. Note that FIG. 5 is a plan view of the movement 20A with the circuit board 23, the magnetic shield plate 26, the circuit retainer 27, etc. removed, as viewed from the back cover side. Also, in FIG. 5, in the plan view, a line connecting the plane center O of the floor board 21 and the 12 o'clock position of the dial 5A where the center hand shaft 60 is arranged is defined as the 12 o'clock virtual line L0. Hereinafter, each line connecting the plane center O and the 1 to 11 o'clock positions is defined as the 1 o'clock virtual line L1, 2 o'clock virtual line L2, 3 o'clock virtual line L3, 4 o'clock virtual line L4, 5 o'clock virtual line L5, 6 o'clock virtual line L6, 7 o'clock virtual line L7, 8 o'clock virtual line L8, 9 o'clock virtual line L9, 10 o'clock virtual line L10, and 11 o'clock virtual line L11.

[0019] The secondary battery 24 is arranged so as to straddle the 10 o'clock virtual line L10 and the 11 o'clock virtual line L11 in the plan view. For this reason, the plane center 240 of the secondary battery 24 is located between the 10 o'clock virtual line L10 which is the first virtual line and the 11 o'clock virtual line L11 which is the second virtual line.

[0020] The driving body 100 drives the hour hand 61, the minute hand 62, the second hand 63, the first sub-hand 71, the second sub-hand 72, the third sub-hand 73, the fourth sub-hand 74, and the date wheel 50. As shown in FIGS. 4 and 5, the driver 100 includes a first motor 101 and a first gear train 110 that drive the hour hand 61, a second motor 102 and a second gear train 120 that drive the minute hand 62, and a third motor 103 and a third gear train 130 that drive the second hand 63. Further, the driver 100 includes a fourth motor 104 and a fourth gear train 140 that drive the home time hour hand 711 which is the first small hand 71, the home time minute hand 712, and the fourth small hand 74, a fifth motor 105 and a fifth gear train 150 that drive the second small hand 72, a sixth motor 106 and a sixth gear train 160 that drive the third small hand 73, and a seventh motor 107 and a seventh gear train 170 that drive the date wheel 50. Each of the motors 101 to 107 is a clock step motor, and only the fourth motor 104 is a two-coil step motor having two coils. Also, each gear train is supported by the base plate 21 and the gear train receiver 22. In this embodiment, three gear train receivers 22 are provided.

[0021] [Arrangement of Motors] Each of the motors 101 to 107 is fixed to the back surface of the base plate 21, and each coil is electrically connected to the wiring of the circuit board 23. As shown in FIG. 5, the first motor 101 is arranged at a position straddling the virtual 7 o'clock line L7 and the virtual 8 o'clock line L8 in a plan view. The second motor 102 is arranged at a position straddling the virtual 1 o'clock line L1 and the virtual 2 o'clock line L2 in a plan view, and is arranged between the plane center O and the seventh motor 107. The third motor 103 is arranged straddling the virtual 4 o'clock line L4 and the virtual 5 o'clock line L5 in a plan view, and is arranged between the plane center O, the fourth motor 104, and the switching device 700. The fourth motor 104 is arranged straddling the virtual 5 o'clock line L5 and the virtual 6 o'clock line L6 in a plan view, and is arranged on the outer peripheral side of the base plate 21 with respect to the first motor 101 and the third motor 103. The fifth motor 105 is arranged at a position overlapping the virtual 9 o'clock line L9 in a plan view, and is arranged between the first motor 101 and the secondary battery 24. The sixth motor 106 is disposed across the 12 o'clock virtual line L0 and the 1 o'clock virtual line L1 in a plan view, and is disposed between the secondary battery 24 and the seventh motor 107. The seventh motor 107 is disposed between the 1 o'clock virtual line L1 and the 2 o'clock virtual line L2 in a plan view, and is disposed on the outer peripheral side of the second motor 102.

[0022] The switching device 700 is disposed across the 3 o'clock virtual line L3 to the 4 o'clock virtual line L4 in a plan view, and the winding reel 701 is disposed overlapping the 3 o'clock virtual line L3 in a plan view. For this reason, each of the motors 101 to 107 is disposed at a position that does not overlap with the secondary battery 24, the switching device 700, and the winding reel 701 in a plan view.

[0023] The first wheel train 110 includes a first intermediate wheel 111 when meshing with the rotor kana of the first motor 101, a second intermediate wheel 112 when meshing with the kana of the first intermediate wheel 111, a third intermediate wheel 113 when meshing with the kana of the second intermediate wheel 112, a detection wheel 114 and a barrel wheel 115 when meshing with the kana of the third intermediate wheel 113. The detection wheel 114 and the barrel wheel 115 are disposed on the surface side of the floor 21, that is, on the side of the dial plate 5A as shown in FIG. 6. A hour hand 61 is attached to the cylindrical hour hand shaft 610 of the barrel wheel 115. The first intermediate wheel 111, the second intermediate wheel 112, and the detection wheel 114 are formed with holes for detecting the needle position, which are detected by a needle position detection device including a light emitting part and a light receiving part that have been conventionally used.

[0024] The second wheel train 120 includes a fifth wheel 121 that meshes with the rotor kana of the second motor 102, a third wheel 122 that meshes with the kana of the fifth wheel 121, and a second wheel 123 that meshes with the kana of the third wheel 122. The second wheel 123 is disposed overlapping the barrel wheel 115 in a plan view. A minute hand 62 is attached to the cylindrical minute hand shaft 620 of the second wheel 123. The fifth wheel 121, the third wheel 122, and the second wheel 123 are formed with holes for detecting the needle position, which are detected by a needle position detection device.

[0025] The third wheel train 130 includes an intermediate second wheel 131 that meshes with the rotor kana of the third motor 103, a second wheel 132 that meshes with the kana of the intermediate second wheel 131, and a second detection wheel 133 that meshes with the kana of the intermediate second wheel 131. The second wheel 132 is arranged overlapping the second car 123 and the barrel wheel 115 in a plan view. A second hand 63 is attached to the second hand shaft 630 of the second wheel 132. The intermediate second wheel 131 and the second detection wheel 133 are formed with holes for detecting the position of the hand, which are detected by a hand position detection device. Therefore, the minute hand shaft 620 is arranged within the cylindrical hour hand shaft 610, and the second hand shaft 630 is arranged within the cylindrical minute hand shaft 620, and these constitute the center hand shaft 60. Further, a center hand train is constituted by the barrel wheel 115 provided with the hour hand shaft 610, the second car 123 provided with the minute hand shaft 620, and the second wheel 132 provided with the second hand shaft 630.

[0026] The fourth wheel train 140 is a wheel train that drives the home time hour hand 711 and the home time minute hand 712 of the first small hand 71, and includes an HT intermediate wheel 141 that meshes with the rotor kana of the fourth motor 104, an HT minute wheel 142 that meshes with the kana of the HT intermediate wheel 141, an HT back-of-the-day wheel 143 that meshes with the kana of the HT minute wheel 142, and an HT barrel wheel 144 that meshes with the kana of the HT back-of-the-day wheel 143. The HT barrel wheel 144 overlaps the HT minute wheel 142 in a plan view and is arranged on the surface side of the floor 21 as shown in FIG. 6. The first small hand 71 is attached to the first small hand shaft 710 provided on the fourth wheel train 140. Specifically, the home time hour hand 711 is attached to the HT hour hand shaft 713 provided on the HT barrel wheel 144, and the home time minute hand 712 is attached to the HT minute hand shaft 714 provided on the HT minute wheel 142. Therefore, the first small hand shaft 710 is constituted by the HT hour hand shaft 713 and the HT minute hand shaft 714, and the first small hand train is constituted by the HT barrel wheel 144 and the HT minute wheel 142.

[0027] The fourth wheel train 140 further has a wheel train provided on the surface side of the base plate 21 for driving the fourth hand 74 which is an AM / PM hand (24-hour hand). That is, as shown in FIG. 6, the fourth wheel train 140 includes a 24-hour first intermediate wheel 145 meshing with the HT barrel 144, a 24-hour second intermediate wheel 146 meshing with the 24-hour first intermediate wheel 145, a 24-hour third intermediate wheel 147 meshing with the 24-hour second intermediate wheel 146, and a 24-hour wheel 148 meshing with the teeth of the 24-hour third intermediate wheel 147. The fourth hand 74 is attached to the 24-hour axis 740 of the 24-hour wheel 148.

[0028] The fifth wheel train 150 is a wheel train for driving the second hand 72. As shown in FIG. 5, it includes a first intermediate wheel 151 meshing with the rotor teeth of the fifth motor 105 and a second hand wheel 152 meshing with the teeth of the first intermediate wheel 151. The second hand wheel 152 has a second hand axis 720 to which the second hand 72 is attached.

[0029] The sixth wheel train 160 is a wheel train for driving the third hand 73. It includes a first intermediate wheel 161 meshing with the rotor teeth of the sixth motor 106 and a third hand wheel 162 meshing with the teeth of the first intermediate wheel 161. The third hand wheel 162 has a third hand axis 730 to which the third hand 73 is attached.

[0030] The seventh wheel train 170 is a wheel train for driving the date wheel 50. It includes a first intermediate wheel 171 meshing with the rotor teeth of the seventh motor 107, a second intermediate wheel 172 meshing with the teeth of the first intermediate wheel 171, a third intermediate wheel 173 meshing with the second intermediate wheel 172, a fourth intermediate wheel 174 disposed on the surface side of the base plate 21 and meshing with the teeth of the third intermediate wheel 173, and a turning wheel 175 disposed on the surface side of the base plate 21 and meshing with the teeth of the fourth intermediate wheel 174.

[0031] As shown in FIGS. 3 and 6, the hour wheel 50 is a ring-shaped component with internal teeth formed on its inner circumference, and the pinion 175 meshes with these internal teeth to rotate the hour wheel 50. Also, the center pivot 60, the first small pivot 710, the second small pivot 720, and the third small pivot 730 are arranged on the inner circumference side of the hour wheel 50 so as not to interfere with the hour wheel 50. The pinion 175 is arranged at a position overlapping the virtual 2 o'clock line L2 in plan view.

[0032] The switching device 700 shown in FIG. 5 is a device that operates in conjunction with the operation of the fuse 3. In addition to the spool 701 to which the fuse 3 is attached, it is a general switching mechanism including a pawl, a cannula, a click spring, a switch lever, a pawl retainer, a switch contact spring body, a switch contact spring, a switch wheel, etc. The spool 701 is provided at the 3 o'clock position of the dial 5A in plan view in the movement 20A. Also, in addition to the spool 701, the switching device 700 including the pawl, etc. is arranged along the outer circumference of the dial 5A, straddling from the virtual 3 o'clock line L3 to the virtual 4 o'clock line L4.

[0033] As shown in FIGS. 3 and 4, in the movement 20A, on the back side of the floor 21, that is, on the back cover side, in addition to the above-described configuration, a wheel train receiver 22, a circuit board 23, a secondary battery 24, a magnetic shield 26, a circuit retainer 27, etc. are arranged. On the back side of the circuit board 23, as shown in FIG. 7, a clock IC 231 for controlling the drive of each motor 101 to 107 is attached. The clock IC 231 is at a position overlapping the virtual 7 o'clock line L7 in plan view and is arranged between the plane center O and the coil of the first motor 101. Also, as shown in FIG. 3, a receiving IC 232 is attached to the front side of the circuit board 23. The receiving IC 232 is at a position straddling the virtual 9 o'clock line L9 and the virtual 10 o'clock line L10 in plan view as shown in FIG. 7 and is arranged between the plane center O and the secondary battery 24. For this reason, the receiving IC 232 is between the virtual 8 o'clock line L8 and the virtual 11 o'clock line L11 and is arranged at a position not overlapping with each of the motors 101 to 107 and the secondary battery 24 in plan view. The receiving IC 232 is a relatively large component as a clock part, and its thickness dimension is also relatively large. Therefore, as shown in FIG. 4, the wheel train receiver 22 is formed with a recess 221 in which the receiving IC 232 is disposed. By forming the recess 221 in the wheel train receiver 22 for disposing the receiving IC 232, the receiving IC 232 having a relatively large thickness dimension can be provided on the surface side of the circuit board 23 in the same manner as each of the motors 101 to 107, and the electronic watch 1 can be made thinner.

[0034] The lower end of a power supply pin 233 for supplying power to the conductor element of the planar antenna 40 is in contact with the circuit board 23. The power supply pin 233 is located at the outer peripheral position of the circuit board 23 in plan view and is disposed between the virtual 11 o'clock line L11 and the virtual 12 o'clock line L0. In the circuit board 23, the terminal with which the lower end of the power supply pin 233 is in contact is electrically connected to the receiving IC 232 by wiring formed on the circuit board 23. By disposing the power supply pin 233 in a position close to the 12 o'clock position of the dial 5A in this way, the reception performance of the planar antenna 40 can be improved. Also, since the distance between the receiving IC 232 and the power supply pin 233 can be made relatively short, the influence of noise can be reduced and the reception performance can be maintained. The lower ends of two conductive members 234 that conduct to the two electrode terminals of the solar cell panel 25 are in contact with the circuit board 23. The conductive members 234 are located at the outer peripheral position of the circuit board 23 in plan view, and one of the conductive members 234 is disposed at a position overlapping the virtual 12 o'clock line L0, and the other conductive member 234 is disposed near the virtual 12 o'clock line L0, specifically, between the virtual 12 o'clock line L0 and the virtual 1 o'clock line L1. Each of the conductive members 234 is specifically constituted by a coil spring, and the current generated by the solar cell panel 25 is charged into the secondary battery 24 via the conductive members 234 and the circuit board 23. Since the power supply pin 233 and the conductive members 234 are disposed near the secondary battery 24 in plan view and further near the outer periphery of the base plate 21, it becomes easy to secure the arrangement space for each of the motors 101 to 107 and each wheel train, and the degree of freedom in the arrangement layout of the motors 101 to 107 and the wheel train can be improved.

[0035] In movement 20A, on the surface side of the floor 21, that is, on the side of the dial plate 5A, as shown in FIG. 3, a barrel presser 31, a circuit board 32 of a needle position detection device, a date wheel 50, a planar antenna 40, a solar cell panel 25, etc. are arranged.

[0036] As also shown in FIGS. 3 and 8, a through hole 41 is formed at the planar center position of the planar antenna 40. With respect to the through hole 41, a through hole 42 is formed on the 6 o'clock side, a through hole 43 is formed on the 9 o'clock side, a through hole 44 is formed on the 12 o'clock side, a through hole 45 is formed on the 3 o'clock side, and a through hole 46 is formed on the approximately 4 o'clock side. Further, in the planar antenna 40, a date window 47, which is an opening for making the date wheel 50 visible, is formed at a position overlapping the date window 51 of the dial plate 5A.

[0037] As shown in FIGS. 3 and 9, the solar cell panel 25 is formed with through holes through which the center needle shaft 60 and the small needle shaft are inserted. That is, a through hole 251 is formed at the planar center position of the solar cell panel 25. With respect to the through hole 251, a through hole 252 is formed on the 6 o'clock side, a through hole 253 is formed on the 9 o'clock side, a through hole 254 is formed on the 12 o'clock side, and a through hole 256 is formed on the approximately 4 o'clock side. Further, in the solar cell panel 25, a date window 257 is formed at a position overlapping the date window 51 of the dial plate 5A. Therefore, as shown in FIGS. 8 and 9, in the electronic clock 1A, the center needle shaft 60 is inserted through the through hole 41 and the through hole 251, the first small needle shaft 710 is inserted through the through hole 42 and the through hole 252, the second small needle shaft 720 is inserted through the through hole 43 and the through hole 253, the third small needle shaft 730 is inserted through the through hole 44 and the through hole 254, and the 24-hour needle shaft 740 is inserted through the through hole 46 and the through hole 256.

[0038] [Second Electronic Clock] The second electronic clock 1B is different from the first electronic clock 1A mainly in that the planar position of the third small window 73B is changed and a part of the configuration of the movement 20B is changed. Therefore, with reference to FIGS. 2, 10, 11, and 12, the differences from the first electronic clock 1A will be mainly described. In the movement 20B of the second electronic clock 1B, the first motor 101, the second motor 102, the third motor 103 that drive the hour hand 61, the minute hand 62, and the second hand 63 which are the center hands 6, and the first wheel train 110, the second wheel train 120, and the third wheel train 130 are the same as those of the first electronic clock 1A, so the description thereof is omitted.

[0039] The fact that the first subsidiary hand 71 of the second electronic clock 1B is driven by the fourth motor 104 is the same as that of the first electronic clock 1A. However, in the second electronic clock 1B, when the HT minute wheel 142 to which the home time minute hand 712 is attached makes 24 revolutions, the reduction ratio of the fourth wheel train 140B is set so that the home time hour hand 711 makes one revolution, that is, so that the home time hour hand 711 becomes a 24-hour hand. Further, in the second electronic clock 1B, since the fourth subsidiary hand 74 is unnecessary, the fourth wheel train 140B is not provided with the 24-hour hand first intermediate wheel 145 to the 24-hour hand wheel 148 that drive the fourth subsidiary hand 74. Therefore, the fourth wheel train 140B is composed of an HT intermediate wheel 141, an HT minute wheel 142, an HT back-of-the-day wheel 143, and an HT barrel wheel 144, and the number of teeth of each gear and kana is set so that the HT barrel wheel 144 makes one revolution when the HT minute wheel 142 makes 24 revolutions.

[0040] The fifth motor 105 and the fifth wheel train 150 that drive the second subsidiary hand 72 of the second electronic clock 1B are the same as those of the first electronic clock 1A. However, the use of the second subsidiary hand 72 functions as a mode hand that indicates various information such as the day of the week and the remaining amount of the secondary battery 24, similar to the third subsidiary hand 73 of the first electronic clock 1A.

[0041] The third small hand shaft 730B of the third small hand 73 is arranged at a position overlapping the 3 o'clock virtual line L3 in a plan view. For this reason, the seventh motor 107 that was used for driving the day wheel 50 in the first electronic clock 1A is used for driving the third small hand 73 in the second electronic clock 1B. That is, the seventh wheel train 170B driven by the seventh motor 107 includes a first intermediate wheel 171, a second intermediate wheel 172, and a third intermediate wheel 173. Further, as shown in FIG. 11, it is disposed on the surface side of the floor 21 and includes a third pinion 176 that meshes with the kana of the third intermediate wheel 173. A third pinion shaft 730B to which the third pin 73 is attached is formed on the third pinion 176. In the second electronic clock 1B, the third pin 73 is used as a 1 / 20 second chronograph hand.

[0042] In the second electronic clock 1B, the date wheel 50 is driven by the sixth motor 106. For this reason, the sixth wheel train 160B driven by the sixth motor 106 includes a first intermediate wheel 161, a second intermediate wheel 163 that meshes with the kana of the first intermediate wheel 161, a third intermediate wheel 164 that meshes with the second intermediate wheel 163, a fourth intermediate wheel 165 that is disposed on the surface side of the floor 21 as shown in FIG. 11 and meshes with the kana of the third intermediate wheel 164, and a rotating wheel 166 that is disposed on the surface side of the floor 21 and meshes with the kana of the fourth intermediate wheel 165. The rotating wheel 166 is disposed between the virtual 10 o'clock line L10 and the virtual 11 o'clock line L11 in plan view and meshes with the internal teeth of the date wheel 50 to drive the date wheel 50. That is, the floor 21 is configured such that the rotating wheels 166 and 175 can be selectively disposed at two locations in the 2 o'clock direction and the 10.5 o'clock direction in plan view. Also in the second electronic clock 1B, the center hand shaft 60, the first pinion shaft 710, the second pinion shaft 720, and the third pinion shaft 730B are disposed on the inner peripheral side of the date wheel 50 so as not to interfere with the date wheel 50. Further, in the electronic clocks 1A and 1B of the present embodiment, the first pinion shaft 710, the second pinion shaft 720, the third pinion shaft 730, and the third pinion shaft 730B are disposed in four directions of 6 o'clock, 9 o'clock, 12 o'clock, and 3 o'clock with respect to the center hand shaft 60. That is, each pinion shaft is configured to be disposed at intervals of 90° in the circumferential direction. Further, the planar distances from the center hand shaft 60 to the first pinion shaft 710, the second pinion shaft 720, the third pinion shaft 730, and the third pinion shaft 730B are equal, and even if three of the four locations where the pinion shafts can be disposed are selected and disposed, the electronic clocks 1A and 1B with good design balance can be obtained.

[0043] In the movement 20B of the second electronic clock 1B, the configuration of the wheel train receiver 22, circuit board 23, secondary battery 24, magnetic shield plate 26, and circuit retainer 27, which are arranged on the back side of the base plate 21, is the same as that of the movement 20A of the first electronic clock 1A, and thus the description thereof is omitted. Also, in the movement 20B, the barrel retainer 31, circuit board 32 of the needle position detection device, date wheel 50, and planar antenna 40, which are arranged on the front side of the base plate 21, are the same as those of the movement 20A, and thus the description thereof is omitted. The solar cell panel of the movement 20B is not shown, but through holes are formed in accordance with the arrangement positions of the center hand shaft 60, first sub - hand shaft 710, second sub - hand shaft 720, and third sub - hand shaft 730, and the divided shape of each solar cell is set according to these through holes.

[0044] In the electronic clocks 1A and 1B described above, the first display wheel constituting the center hand wheel is the barrel wheel 115, the second display wheel is the second wheel 123, and the third display wheel is the second hand wheel 132. The first pointer shaft constituting the center hand shaft 60 is the hour hand shaft 610, the second pointer shaft is the minute hand shaft 620, the third pointer shaft is the second hand shaft 630, the first pointer is the hour hand 61, the second pointer is the minute hand 62, and the third pointer is the second hand 63. The first to fourth positions on the base plate 21 where the sub - hand wheels are arranged are as follows. That is, in a plan view, the position of the through hole 42 of the planar antenna 40 where the first sub - hand shaft 710 is arranged is the first position, the position of the through hole 43 where the second sub - hand shaft 720 is arranged is the second position, the position of the through hole 44 where the third sub - hand shaft 730 is arranged is the third position, and the position of the through hole 45 where the third sub - hand shaft 730B is arranged is the fourth position.

[0045] [Effects of the Embodiment] In the first electronic clock 1A and the second electronic clock 1B where the arrangement positions of the first sub - hand 71, second sub - hand 72, and third sub - hand 73 are different, in addition to the barrel wheel 115, second wheel 123, and second hand wheel 132 which are the center hand wheels, the sub - hand wheels such as the HT minute wheel 142, HT barrel wheel 144, second sub - hand wheel 152, third sub - hand wheel 162, and 176 are arranged overlapping the planar antenna 40 in a plan view. Therefore, the degree of freedom in the arrangement position of each sub - hand can be improved, and the degree of freedom in the design variations of the electronic clock 1 can be improved. Further, since the planar antenna 40 is arranged to overlap the drive body 100 in a plan view, compared with the case of arranging the planar antenna so as not to overlap with each of the motors 101 to 107, the center pinwheel, the small pinwheel, etc. in a plan view as in the case of using a patch antenna, the planar size of the electronic watch 1 can be reduced and miniaturized. For example, the outer diameters of the electronic watches 1A and 1B of the present embodiment are within 45 mm, and they can be housed in a size comparable to that of a general wristwatch. The secondary battery 24 is arranged at a position where it does not overlap with each of the motors 101 to 107, the center pinwheel, and the small pinwheel. Further, since the planar center 240 of the secondary battery 24 is arranged between the virtual 10 o'clock line L10 and the virtual 11 o'clock line L11, the secondary battery 24 can also be arranged at a position where it does not overlap with the switching device 700 including the winding drum 701, the buttons 4A, 4B, etc. Therefore, compared with the case where the secondary battery 24 overlaps with each of the motors 101 to 107 and each display wheel in a plan view, the electronic watches 1A and 1B can be made thinner. Therefore, in the electronic watches 1A and 1B, it is possible to improve the degree of freedom in design variations while maintaining a small and thin shape.

[0046] Each of the motors 101 to 107 is arranged so as not to overlap with each other in a plan view, and further not to overlap with any of the switching device 700 including the winding drum 701, the secondary battery 24, and the reception IC 232 in a plan view. Therefore, compared with the case where the motors 101 to 107 overlap with the secondary battery 24 or the like, the electronic watches 1A and 1B can be made thinner. Further, since the secondary battery 24 and the reception IC 232, which are arranged on the surface side of the circuit board 23, that is, on the base plate 21 side and have relatively large thickness dimensions, are arranged adjacent to each other, the degree of freedom in the arrangement positions of each of the motors 101 to 107, the wheel train, and the small pinwheel can be improved.

[0047] In the space where the dial plates 5A and 5B, the solar cell panel 25, and the planar antenna 40 overlap in plan view, the motors 101 to 107, the secondary battery 24, the receiving IC 232, and the switching device 700 including the roll film 701 are arranged dispersedly so as not to overlap with each other. Therefore, in the movements 20A and 20B, components with relatively large areas can be arranged dispersedly. With these layouts, the degree of freedom in the layout of each small window is increased, and a watch with a diverse design can be provided. Further, by using the first small hand 71, the second small hand 72, and the third small hands 73 provided on the first small window 71A, the second small window 72A, and the third small windows 73A and 73B, a chronograph, a home time, and further display of various information can be performed, and multifunctional expansion can be easily carried out.

[0048] The base plate 21 and the planar antenna 40 are formed so that, in addition to the center hand shaft 60, the first small hand shafts 710, the second small hand shafts 720, the third small hand shafts 730 and 730B can be arranged at four positions different from the position of the center hand shaft 60 in plan view. Since the small hand shafts are selectively arranged at at least three of these four positions, a plurality of designs with different positions of the small hands can be easily set, and the degree of freedom in the design variations of the electronic watches 1A and 1B can be improved. In the first electronic watch 1A and the second electronic watch 1B, the base plate 21, the planar antenna 40, the motors 101 to 107, etc. are made common, and each wheel train 110, 120, 130, 140, 150, 160, 170 also has almost the same configuration. Since the first electronic watch 1A and the second electronic watch 1B can be realized with a minimum of changes, a plurality of design variations can be realized at low cost.

[0049] Since the first motor 101, the second motor 102, and the third motor 103 that drive the hour hand 61, the minute hand 62, and the second hand 63, which are the center hands 6, are provided independently, when correcting the time based on the signal received by the planar antenna 40, the hour hand 61, the minute hand 62, and the second hand 63 can be corrected independently, and the correct time can be corrected in a short time, improving convenience. In addition, since the motors 101 to 103 that drive the hour hand 61, minute hand 62, and second hand 63, which are the center needles 6, are arranged on the central side of the movements 20A and 20B, the number of gears in the first gear train 110, second gear train 120, and third gear train 130 can also be reduced. For this reason, an efficient layout can be realized, the planar dimensions of the movements 20A and 20B can be reduced, and the electronic clocks 1 and 1B can be miniaturized.

[0050] In the first electronic clock 1A, the sixth motor 106 and the sixth gear train 160 drive the third sub - hand 73 at the 12 o'clock position, and the seventh motor 107 and the seventh gear train 170 drive the date wheel 50. In the second electronic clock 1B, the sixth motor 106 and the sixth gear train 160B drive the date wheel 50, and the seventh motor 107 and the seventh gear train 170B drive the third sub - hand 73 at the 3 o'clock position. Therefore, the gears arranged on the surface side of the floor 21, that is, the inner peripheral side of the date wheel 50, can also be arranged in a well - balanced and dispersed manner. For this reason, the assembly workability of the movements 20A and 20B can also be improved.

[0051] Since the fourth motor 104 is a high - speed motor having two coils, the home - time hour hand 711 and home - time minute hand 712 can also move at high speed. For this reason, when changing the time zone of the home time, or when swapping the local time indicated by the hour hand 61 and minute hand 62 with the home time, the correction of the home - time hour hand 711 and home - time minute hand 712 can be performed in a short time.

[0052] [Other Embodiments] Note that the present invention is not limited to the above - described embodiments, and various modifications can be made within the scope of the gist of the present invention. The locations for arranging the small windows and small hand shafts are not limited to the examples of the electronic clocks 1A and 1B. For example, small windows or small hand shafts may be arranged at three locations, namely, the 3 o'clock position, 9 o'clock position, and 12 o'clock position of the dial plate, or small windows or small hand shafts may be arranged at three locations, namely, the 3 o'clock position, 6 o'clock position, and 12 o'clock position of the dial plate. In addition, the locations where small hand shafts can be arranged are not limited to the 3 o'clock position, 6 o'clock position, 9 o'clock position, and 12 o'clock position of the dial plate. For example, they may be set at the 1.5 o'clock position of the dial plate and at 90° intervals in the circumferential direction from this 1.5 o'clock position. Furthermore, the four positions where the small hand shaft can be arranged are not limited to those set at 90° intervals in the circumferential direction. For example, it may be arranged at non-uniform intervals in the circumferential direction, such as at the 2 o'clock position, 4 o'clock position, 8 o'clock position, and 10 o'clock position of the dial. Since the number of positions where the small hand shaft can be arranged may be at least three, it is not limited to four as in the above embodiment, and three positions are also possible. When there are three positions where the small hand shaft can be arranged, the design of the dial of the electronic clock can be changed by arranging the small hand shaft at two positions selected from these three positions. The number of small hand shafts arranged is not limited to one less than the number of positions where the small hand shaft can be arranged. For example, when the small hand shaft can be arranged at four positions, an electronic clock with the small hand shaft arranged at four positions may be added as a variation. In this case, the date wheel 50 may be omitted, and the fourth small hand may be driven by the motor and the gear train that drove the date wheel 50. Or, the hour hand 61 and the minute hand 62 may be driven by one motor and gear train, and the fourth small hand may be driven by the motor and gear train that drove the hour hand 61 or the minute hand 62. Furthermore, when the small hand shaft can be arranged at four positions, an electronic clock with the small hand shaft arranged at two selected positions may be added as a variation. In the case of these electronic clocks, the movement may be configured without incorporating unnecessary motors and gear trains.

[0053] The fourth motor 104 is not limited to a two-coil motor, and a one-coil motor similar to other motors may also be used. Also, the first pointer, the second pointer, and the third pointer attached to the first display wheel, the second display wheel, and the third display wheel, which are the center hand wheels, are not limited to the hour hand 61, the minute hand 62, and the second hand 63 that display local time. For example, the third pointer may be used as a second chronograph hand, and the second small hand 72 or the third small hand 73 may be used as the second hand. The information displayed by the first small hand 71, the second small hand 72, and the third small hand 73 is not limited to the above embodiment, and may be set according to the functions realized by the electronic clocks 1A and 1B. Also, the calendar wheel is not limited to the date wheel 50. For example, the date may be indicated by the second small hand 72 or the third small hand 73, which are mode hands, and the day of the week may be displayed by the calendar wheel.

[0054] The signal received by the planar antenna 40 is not limited to the satellite signal transmitted from a GPS satellite which is a position information satellite. For example, the satellite signal may be a signal transmitted from a satellite used in other global navigation satellite systems (GNSS) such as Galileo (EU), GLONASS (Russia), Beidou (China), etc. Further, the satellite signal may be a satellite signal transmitted from a geostationary satellite such as a satellite-based augmentation system (SBAS) or a regional satellite positioning system (RNSS) such as a quasi-zenith satellite which can be searched only in a specific region. Furthermore, the planar antenna 40 may be configured to receive signals other than satellite signals. The battery is not limited to the secondary battery 24 and may be a primary battery.

[0055] [Summary] The electronic timepiece of the present disclosure includes a base plate, a dial plate disposed on one side of the base plate, a flat antenna disposed between the base plate and the dial plate, a center hand wheel having a center hand shaft to which a center hand is attached, a plurality of small hand wheels having small hand shafts to which small hands are attached, a plurality of motors disposed on the side of the base plate opposite to the dial plate and driving the center hand wheel and the plurality of small hand wheels respectively, and a battery disposed on the side of the base plate opposite to the dial plate and supplying power to drive the plurality of motors. The base plate is formed so as to be able to dispose the center hand wheel, and in a plan view seen from a direction orthogonal to the surface of the dial plate, is formed so as to be able to dispose the small hand wheels at three positions different from the position where the center hand wheel is disposed. Through holes through which the center hand shaft and the small hand shafts can be inserted are respectively formed in the antenna. The small hand wheels are selectively disposed at at least two of the three positions. The battery is disposed at a position that does not overlap with the plurality of motors, the center hand wheel, and the three positions where the small hand wheels can be disposed in the plan view, and the planar center of the battery is located between a virtual line connecting the planar center of the dial plate and the 10 o'clock position and a virtual line connecting the planar center of the dial plate and the 11 o'clock position. In the electronic timepiece of the present disclosure, in addition to the center pinwheel, the base plate and the antenna are formed so that the minute pinwheels can be arranged at three positions different from the position of the center pinwheel in plan view, and the minute pinwheels are selectively arranged at at least two of these three positions. Therefore, a plurality of designs with different positions of the minute hands can be easily set, and the degree of freedom in design variations of the electronic timepiece can be improved. Further, since a flat antenna arranged between the base plate and the dial plate is used, the antenna and each minute pinwheel can be arranged to overlap in plan view, and the battery is arranged at a position that does not overlap with the motor, the center pinwheel, and the minute pinwheel in plan view. Therefore, the electronic timepiece can be made small and thin, and the degree of freedom in design variations can be improved.

[0056] In the electronic timepiece of the present disclosure, a circuit board arranged on the back cover side of the base plate and a receiving IC attached to the surface of the circuit board are provided. The receiving IC is arranged at a position that does not overlap with the plurality of motors and the battery in plan view, and it is preferable that the receiving IC is located between a virtual line connecting the planar center of the dial plate and the 8 o'clock position and a virtual line connecting the planar center of the dial plate and the 11 o'clock position. In the electronic timepiece of the present disclosure, since the receiving IC arranged at a position that does not overlap with the battery or the motor in plan view is arranged near the battery, the constraints on the arrangement positions of the minute pinwheels can be reduced.

[0057] In the electronic timepiece of the present disclosure, between the base plate and the antenna, a calendar wheel formed in a ring shape with internal teeth formed on the inner circumference and a driving wheel meshing with the internal teeth of the calendar wheel are arranged. An opening through which a part of the calendar wheel can be visually recognized is formed in the antenna. The base plate is formed so that the driving wheel can be selectively arranged at two positions. The arrangement position of the driving wheel is selected according to the arrangement position of the minute pinwheel. It is preferable that the motor arranged at the same position as the motor that drives the driving wheel when the driving wheel is arranged at one position drives the minute pinwheel when the driving wheel is arranged at the other position. In the electronic timepiece of the present disclosure, since the driving wheel for driving the calendar wheel such as the date wheel can be selectively arranged at two positions, the arrangement position of the driving wheel can be selected according to the arrangement position of the minute hand wheel, and each gear arranged on the dial side of the base plate, that is, the inner peripheral side of the date wheel, can also be arranged in a well-balanced and dispersed manner.

[0058] In the electronic timepiece of the present disclosure, the three positions where the minute hand wheel can be arranged may be a first position overlapping a virtual line connecting the center of the dial and the 6 o'clock position in the plan view, a second position overlapping a virtual line connecting the center of the dial and the 9 o'clock position in the plan view, and a third position overlapping a virtual line connecting the center of the dial and the 12 o'clock position in the plan view. In the electronic timepiece of the present disclosure, a design in which the minute hand is arranged at three positions on the 6 o'clock side, 9 o'clock side, and 12 o'clock side with respect to the center of the dial can be realized.

[0059] In the electronic timepiece of the present disclosure, it preferably includes a mainspring arranged to overlap a virtual line connecting the center of the dial and the 3 o'clock position in the plan view, and the minute hand wheel can be selectively arranged on the surface of the base plate and at a position overlapping the virtual line connecting the center of the dial and the 3 o'clock position in the plan view. In the electronic timepiece of the present disclosure, the minute hand can be arranged at three positions selected from four positions on the 3 o'clock side, 6 o'clock side, 9 o'clock side, and 12 o'clock side with respect to the center of the dial. Therefore, an electronic timepiece with a design in which the minute hand is arranged at three positions on the 6 o'clock side, 9 o'clock side, and 12 o'clock side with respect to the center of the dial, or an electronic timepiece with a design in which the minute hand is arranged at three positions on the 3 o'clock side, 6 o'clock side, and 9 o'clock side with respect to the center of the dial can be easily realized.

[0060] In the electronic timepiece of the present disclosure, it includes a receiving IC that processes the radio wave received by the antenna, a circuit board on which the receiving IC is mounted, and a power supply pin that supplies power to the antenna, and the receiving IC and the power supply pin are preferably arranged between a virtual line connecting the plane center of the dial and the 8 o'clock position and a virtual line connecting the plane center of the dial and the 12 o'clock position in the plan view. In the electronic timepiece of the present disclosure, since the reception IC and the power supply pins are collectively arranged near the battery, a space for arranging the motor and the wheel train can be secured, and the arrangement efficiency of the timepiece components can be improved. Further, since the distance between the reception IC and the power supply pins can be made close, the reception performance can also be maintained.

[0061] In the electronic timepiece of the present disclosure, between the base plate and the antenna, there are arranged a calendar wheel formed in a ring shape and having internal teeth formed on its inner circumference, and a pinion meshing with the internal teeth of the calendar wheel. The center hand wheel has a first display wheel, a second display wheel, and a third display wheel. The first display wheel has a cylindrical first hand shaft to which a first hand is attached. The second display wheel has a cylindrical second hand shaft to which a second hand is attached and which is inserted into the first hand shaft. The third display wheel has a third hand shaft to which a third hand is attached and which is inserted into the second hand shaft. The base plate further has a fourth location where the sub - hand wheel can be arranged on the dial side of the base plate at a position that does not overlap with the battery in plan view, in addition to the first location, the second location, and the third location where the sub - hand wheel is arranged. The antenna is formed with a through - hole through which the center hand shaft can be inserted, and four through - holes through which the sub - hand shaft can be inserted when the sub - hand wheel is arranged from the first location to the fourth location. The sub - hand wheel has a first sub - hand wheel, a second sub - hand wheel, and a third sub - hand wheel. The first sub - hand wheel has a first sub - hand attached thereto and is arranged at the first location. The second sub - hand wheel has a second sub - hand attached thereto and is arranged at the second location. The third sub - hand wheel has a third sub - hand attached thereto and is arranged at the third location or the fourth location. The plurality of motors includes seven motors, namely, three motors for driving the first display wheel, the second display wheel, and the third display wheel respectively, three motors for driving the first sub - hand wheel, the second sub - hand wheel, and the third sub - hand wheel respectively, and a motor for driving the pinion. It is preferable that the seven motors are arranged so as not to overlap with the battery in plan view and to overlap with the dial and the antenna. In the electronic timepiece of the present disclosure, since the first display wheel, the second display wheel, and the third display wheel are provided as the center hand wheels, the first hand, the second hand, the third hand, etc., such as the hour hand, the minute hand, and the second hand, can be attached to each display wheel to display the local time. Further, since the first sub - hand wheel, the second sub - hand wheel, and the third sub - hand wheel are provided, the first sub - hand, the second sub - hand, and the third sub - hand can be attached to each sub - hand wheel to display the home time, the chronograph, various information, etc. At this time, since the third sub - hand wheel is selectively arranged at the third or fourth position, two types of electronic timepieces with different positions of the third sub - hand can be easily realized.

Explanation of Signs

[0062] 1…Electronic clock, 1A…First electronic clock, 1B…Second electronic clock, 2…Outer case, 3…Ruse, 4A…Button, 4B…Button, 5A…Dial, 5B…Dial, 6…Center hand, 20A…Movement, 20B…Movement, 21…Floor plate, 22…Wheel train support, 23…Circuit board, 24…Secondary battery, 25…Solar cell panel, 26…Magnetic shield plate, 27…Circuit retainer, 31…Barrel retainer, 32…Circuit board, 40…Planar antenna, 41…Through hole, 42…Through hole, 43…Through hole, 44…Through hole, 45…Through hole, 46…Through hole, 47…Date window, 50…Date wheel, 51…Date window, 60…Center hand shaft, 61…Hour hand, 62…Minute hand, 63…Second hand, 71…First sub-hand, 71A…First sub-window, 72…Second sub-hand, 72A…Second sub-window, 73…Third sub-hand, 73A…Third sub-window, 73B…Third sub-window, 74…Fourth sub-hand, 74A…Fourth sub-window, 100…Driver, 101…First motor, 102…Second motor, 103…Third motor, 104…Fourth motor, 105…Fifth motor, 106…Sixth motor, 107…Seventh motor, 110…First wheel train, 115…Barrel, 120…Second wheel train, 121…Fifth wheel, 122…Third wheel, 123…Second wheel, 130…Third wheel train, 132…Second wheel, 140…Fourth wheel train, 140B…Fourth wheel train, 142…HT minute wheel, 144…HT barrel, 150…Fifth wheel train, 152…Second sub-hand wheel, 160…Sixth wheel train, 160B…Sixth wheel train, 162…Third sub-hand wheel, 166…Rotating wheel, 170…Seventh wheel train, 170B…Seventh wheel train, 175…Rotating wheel, 176…Third sub-hand wheel, 231…Clock IC, 232…Receiving IC, 233…Power supply pin, 234…Conductive member, 610…Hour hand shaft, 620…Minute hand shaft, 630…Second hand shaft, 700…Switching device, 701…Scroll, 710…First sub-hand shaft, 711…Home time hour hand, 712…Home time minute hand, 713…HT hour hand shaft, 714…HT minute hand shaft, 720…Second sub-hand shaft, 730…Third sub-hand shaft, 730B…Third sub-hand shaft.

Claims

1. A floor, A letter plate disposed on one side of the floor, A flat antenna disposed between the floor and the letter plate, A center pin wheel having a center pin shaft to which a center pin is attached, A plurality of small pin wheels having small pin shafts to which small pins are attached, A plurality of motors disposed on the side of the floor opposite to the letter plate, and driving the center pin wheel and the plurality of small pin wheels respectively, A battery disposed on the side of the floor opposite to the letter plate, and supplying power to drive the plurality of motors, Comprising: The floor is formed to be able to dispose the center pin wheel, and in a plan view seen from a direction orthogonal to the surface of the letter plate, the floor is formed to be able to dispose the small pin wheels at three positions different from the position where the center pin wheel is disposed, The antenna is respectively formed with through holes through which the center pin shaft and the small pin shaft can be inserted, The small pin wheels are selectively disposed at at least two of the three positions, The battery is disposed at a position that does not overlap with the plurality of motors, the center pin wheel, and the three positions where the small pin wheels can be disposed in the plan view, and the plane center of the battery is located between a virtual line connecting the plane center of the letter plate and the 10 o'clock position and a virtual line connecting the plane center of the letter plate and the 11 o'clock position An electronic timepiece characterized by the above.

2. In the electronic timepiece according to Claim 1, A circuit board disposed on the back cover side of the floor, A receiving IC attached to the surface of the circuit board, The receiving IC is disposed at a position that does not overlap with the plurality of motors and the battery in the plan view, and the receiving IC is located between a virtual line connecting the plane center of the letter plate and the 8 o'clock position and a virtual line connecting the plane center of the letter plate and the 11 o'clock position An electronic timepiece characterized by the above.

3. In the electronic timepiece according to Claim 1, Between the floor and the antenna, a calendar wheel formed in a ring shape with internal teeth formed on the inner circumference, and a turning wheel meshing with the internal teeth of the calendar wheel are disposed, The antenna is formed with an opening through which a part of the calendar wheel can be visually recognized, The floor is formed to be able to selectively dispose the turning wheel at two positions, and the disposition position of the turning wheel is selected according to the disposition position of the small pin wheel, When the rotating wheel is placed at one position, the motor arranged at the same position as the motor driving the rotating wheel is for driving the small hand wheel when the rotating wheel is placed at the other position. An electronic timepiece characterized by the above.

4. In the electronic timepiece according to Claim 1, The three positions where the small hand wheel can be arranged are a first position overlapping a virtual line connecting the center of the dial and the 6 o'clock position in the plan view, a second position overlapping a virtual line connecting the center of the dial and the 9 o'clock position in the plan view, and a third position overlapping a virtual line connecting the center of the dial and the 12 o'clock position in the plan view. An electronic timepiece characterized by the above.

5. In the electronic timepiece according to Claim 4, it includes a winding stem arranged to overlap a virtual line connecting the center of the dial and the 3 o'clock position in the plan view, and the small hand wheel can be selectively arranged on the surface of the base plate and at a position overlapping the virtual line connecting the center of the dial and the 3 o'clock position in the plan view. An electronic timepiece characterized by the above.

6. In the electronic timepiece according to Claim 1, a receiving IC for processing the radio wave received by the antenna, a circuit board on which the receiving IC is mounted, and a power supply pin for supplying power to the antenna, are provided. The receiving IC and the power supply pin are arranged between a virtual line connecting the planar center of the dial and the 8 o'clock position and a virtual line connecting the planar center of the dial and the 12 o'clock position in the plan view. An electronic timepiece characterized by the above.

7. In the electronic timepiece according to Claim 1, between the base plate and the antenna, a calendar wheel formed in a ring shape with internal teeth formed on the inner circumference and a rotating wheel meshing with the internal teeth of the calendar wheel are arranged. The center hand wheel has a first display wheel, a second display wheel, and a third display wheel. The first display wheel has a cylindrical first pointer shaft to which a first pointer is attached. The second display wheel has a cylindrical second pointer shaft to which a second pointer is attached and which is inserted into the first pointer shaft. The third display wheel has a third pointer shaft to which a third pointer is attached and which is inserted into the second pointer shaft. In addition to the first position, the second position, and the third position where the small hand wheel is arranged, the base plate further has a fourth position where the small hand wheel can be arranged on the dial side of the base plate at a position not overlapping the battery in the plan view. The antenna is formed with a through-hole through which the center pivot shaft can be inserted, and four through-holes through which the small pivot shafts can be inserted when the small pivot wheels are arranged at the first to fourth positions. The small pivot wheels include a first small pivot wheel, a second small pivot wheel, and a third small pivot wheel. The first small pivot wheel has a first small needle attached thereto and is arranged at the first position. The second small pivot wheel has a second small needle attached thereto and is arranged at the second position. The third small pivot wheel has a third small needle attached thereto and is arranged at the third or fourth position. The plurality of motors includes seven motors: three motors for driving the first display wheel, the second display wheel, and the third display wheel respectively; three motors for driving the first small pivot wheel, the second small pivot wheel, and the third small pivot wheel respectively; and a motor for driving the turntable. The seven motors are arranged so as not to overlap with the battery in the plan view and to overlap with the dial and the antenna. An electronic timepiece characterized by the above.

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