JP5715527B2 - Radio wave watch - Google Patents

Description

  The present invention relates to a radio wave wristwatch.

  In an electronic wristwatch including a radio-controlled wristwatch, there is a possibility of malfunction due to static electricity when a user operates an operation member such as a crown. In order to prevent this, by short-circuiting the metal case that becomes the ground potential of the electronic watch and the operating member, the static electricity is quickly released to the case, preventing the inflow of static electricity to the watch circuit inside the electronic watch. It is known.

  For example, in Patent Document 1, a pressing means that presses a click lever that engages a winding stem that is an operation member is provided on a circuit pressing plate, and a conductive portion that conducts to the case at a position near the winding stem of the circuit pressing plate is provided. An electronic wristwatch provided is described.

  Patent Document 2 describes a radio-controlled wristwatch in which a power source terminal of a timepiece circuit unit is connected to an outer case or a back cover with a conductive spring in order to improve electrostatic resistance. In such a radio-controlled wristwatch, the conductive spring is set apart from the antenna by a predetermined length or more in order to reduce the influence on the reception characteristics of the antenna.

Japanese Patent No. 3630098 JP 2010-48605 A

  In general, a radio wave received by a radio clock is a long wave called a standard radio wave. This standard radio wave reception is geographically limited and has a drawback that it takes a long time to receive because it uses a low-frequency carrier wave. Therefore, in a global positioning system represented by GPS (Global Positioning System) A radio-controlled timepiece that receives the ultra-high frequency used has been proposed. For receiving such ultra high frequency waves, not a bar antenna used for receiving long wave radio waves but an antenna having a receiving surface in the incident direction of ultra high frequency waves, such as a patch antenna, a chip antenna, or a plate-like inverted F antenna. A planar antenna such as is used.

  A planar antenna for receiving such an ultra-short wave is larger than a bar antenna used for receiving a long wave. Also, when receiving ultra-high frequencies, a large amount of power is required to operate the high-frequency circuit, and a battery to be mounted must be large. When the planar antenna and the battery thus enlarged are housed in a wristwatch case, the space that can be broken by the mounting mechanism (so-called reverse) of the operation member such as the crown becomes small. It is difficult to provide a structure in which a circuit pressing plate arranged on the back side of a watch movement is directly short-circuited to a click lever that engages with a winding stem. For this reason, the static electricity flowing from the operation member must be discharged to the case via the substrate on which the clock circuit is mounted. However, this increases the possibility of malfunction due to static electricity.

  The present invention has been made in view of such circumstances, and a problem to be solved is to reduce malfunction caused by static electricity flowing from the winding stem in a radio wave wristwatch having a planar antenna.

  In order to solve the above-described problems, a radio-controlled wristwatch according to the present invention includes a winding stem to which a crown is attached, a clock circuit on which a clock circuit is mounted and electrically connected by the winding stem and the first contact, and a planar antenna. A radio-controlled wristwatch comprising a movement having a planar antenna substrate mounted in a case having a metal back cover, and passing through the watch circuit board from the winding stem in the axial direction of the winding stem. The electrical path to be short-circuited to the case and the planar antenna are arranged on one side with respect to a straight line passing in the thickness direction passing through the first contact or the winding stem, and the clock circuit is connected to the straight line. It is arranged on the side.

  According to the present invention, it is possible to reduce malfunction caused by static electricity flowing from the winding stem in a radio-controlled wristwatch having a planar antenna.

1 is a plan view showing a radio wristwatch according to a first embodiment of the present invention. It is the top view which looked at the movement accommodated in the case of a radio-wave wristwatch from the back side. It is a schematic exploded perspective view of a movement. It is a fragmentary sectional view of the movement in the axial direction view of the winding stem. It is the figure which showed on the sectional view shown in FIG. 4 the electrical path | route which short-circuits from a winding stem through a timepiece circuit board to a back cover. In the 2nd Embodiment of this invention, it is the figure which showed on the partial sectional view of the movement in the axial view of a winding stem the electrical path | route which short-circuits to a back cover from a winding stem through a timepiece circuit board.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  FIG. 1 is a plan view showing a radio-controlled wristwatch 100 according to the first embodiment of the present invention. The figure shows a case 1 constituting a case (exterior) of the radio-controlled wristwatch 100, a dial 2 arranged in the case 1, and an hour hand 3, a minute hand 4 and a second hand 5 which are hands indicating time. Further, a crown 6 and a push button 7 for a user to perform various operations are arranged on the side surface of the trunk 1 on the 3 o'clock side. A band fixing portion 8 for fixing the band extends from the side surface of the trunk 1 on the 12 o'clock side and the 6 o'clock side.

  In addition, the design of the radio-controlled wristwatch 100 shown in the figure is an example. In addition to those shown here, for example, the body 1 may be square instead of round, and the presence / absence, number, and arrangement of the push buttons 7 are arbitrary. Further, in the present embodiment, the hands are three hands of the hour hand 3, the minute hand 4, and the second hand 5, but the present invention is not limited to this, and even if the second hand 5 is omitted, the day of the week, the time zone or the presence / absence of summer time, the radio wave The reception status, remaining battery level, pointers for various displays, date display, and the like may be added. The case is composed of a case 1 and a back cover 9 that does not appear in FIG. 1. However, both the case 1 and the back cover 9 may be made of metal, or the case 1 may be made of a material other than metal, for example, ceramic. The back cover 9 may be made of metal and vice versa. In any case, at least one of the case 1 and the back cover 9 constituting the case is made of metal.

  In the present specification, as described above, the term radio-controlled wristwatch is used to indicate a radio-controlled timepiece and a wristwatch. In the present embodiment, the radio-controlled wristwatch 100 receives the satellite signal from a satellite that transmits the satellite signal including information related to the date and time, such as a GPS satellite, and includes information related to the date and time included therein, that is, reference information. Based on this, it has a function of correcting the internal time, which is information on the time held in the wristwatch. However, the radio signal received by the radio wristwatch 100 is not limited to a satellite signal, and is not particularly limited as long as the signal includes reference information. However, since the radio wave signal is preferably received by the planar antenna 11 described later, it is preferably a high frequency signal from a short wave to a very high frequency.

  In the radio-controlled wristwatch 100, a windshield made of a transparent material such as glass is attached to the case 1 so as to cover the dial 2. A back cover 9 is attached to the body 1 on the opposite side of the windshield. In the present specification, hereinafter, the direction in which the windshield of the radio-controlled wristwatch 100 is arranged (front side in FIG. 1) is referred to as the front side, and the direction in which the back cover 9 is arranged (back direction in FIG. 1) is referred to as the back side.

  On the back side of the dial 2, the battery 10 and the planar antenna 11 are arranged so as not to overlap in a plan view. The battery 10 is a lithium secondary battery in the present embodiment, and can store electric power generated by a solar battery provided on the back side of the dial 2. Therefore, the dial 2 is transparent or translucent. In addition, the kind of battery 10 is not specifically limited, A primary battery may be sufficient. In that case, a solar cell may not be provided and the dial 2 may not have transparency. In addition, in this specification, as described above, the term planar antenna is used to indicate an antenna having a receiving surface in the incident direction of a radio wave signal. In the present embodiment, the planar antenna 11 is a patch antenna, and the radio signal received thereby is a satellite signal from a GPS satellite, which is a very high frequency wave. The planar antenna 11 is provided with a feed pin 11b so as to penetrate the thickness direction, and a surface facing the front side is a reception surface 11a for receiving a radio signal.

  The dial 2 is wider than the opening on the front side of the cylinder 1, and the cylinder 1 covers the periphery. For this reason, the dial 2 is configured such that only the region (exposed region) inside the outline (parting line) X of the opening of the trunk 1 is visible from the outside through the windshield, and is outside the contour X. This region (non-exposed region) is hidden by the barrel 1 and cannot be seen from the outside.

  FIG. 2 is a plan view of the movement 101 housed in the case of the radio-controlled wristwatch 100 as viewed from the back side. The movement 101 has a configuration in which each member is assembled to a ground plane 12 made of a substantially circular insulating material serving as a support frame. In FIG. 2, the winding stem 13 to which the crown 6 is attached so as to jump out from the movement 101 in the upward direction in the figure is visible. Accordingly, in the figure, the upward direction corresponds to the 3 o'clock direction in FIG. 1, the right direction is the 12 o'clock direction, and the left direction is the 6 o'clock direction.

  In FIG. 2, the surface corresponding to the positive electrode of the battery 10 is visible, and a metal plate 14 is provided so as to press the battery 10 from the back side. The metal plate 14 is provided with a battery pressing portion 141 that is in contact with the positive electrode of the battery 10 and is conductive. The potential of the positive electrode, that is, the potential of the metal plate 14 is the ground potential of the radio wave wristwatch 100. The battery holding portion 141 is a tongue-like protrusion having spring elasticity, and presses and fixes the battery 10 to the base plate 12 side. Further, a planar antenna substrate contact portion 142, which is also a tongue-like protrusion having spring elasticity, extends toward the front side, and is in contact with and in conduction with the planar antenna substrate 15 disposed on the front side of the metal plate 14. The two planar antenna substrate contact portions 142 are provided as shown in the drawing in order to ensure electrical connection. Similarly, back cover contact portions 143 and 144 which are tongue-like protrusions having spring elasticity extend toward the back side. When the movement 101 is accommodated in the case, the back cover contact portions 143 and 144 are terminals for short-circuiting the case and the movement 101 and bringing the case to the ground potential by contacting the back cover and conducting. Further, FIG. 2 shows a metal setting 16, a back presser 17, a first switch return spring 18, and a second switch return spring 19 that fit into a recess provided in the winding stem 13. The back presser 17 is made of a metal that presses the setting lever 16 against the winding stem 13 by spring elasticity, and biases the posture of the winding stem 13 to a specific position to give an appropriate click feeling during the operation. It is an elastic member. Further, the first switch return spring 18 and the second switch return spring 19 are deformed by the pressing operation of the push button 7 shown in FIG. 1, and are formed on the clock circuit board (not visible in FIG. 2). It is a metal elastic member for detecting the pressing operation. The first switch return spring 18 and the second switch return spring 19 push back the push button 7 after the pressing operation to a specified position by its elasticity. Although the back presser 17, the first switch return spring 18 and the second switch return spring 19 are originally located on the front side of the metal plate 14, they cannot be seen, but in FIG. In the same figure, the position of the controller 20 mounted on the watch circuit board is also indicated by a broken line. The controller 20 is a chip-type integrated circuit such as an IC (Integrated Circuit) and has a built-in control circuit that controls the operation of the entire radio-controlled wristwatch 100 and a clock circuit that counts the time held by the radio-controlled wristwatch 100. It is. Therefore, a timepiece circuit is mounted on the timepiece circuit board. In order to prevent malfunction of the radio-controlled wristwatch 100 due to static electricity, in particular, time lag, it is necessary to eliminate the influence of static electricity on the timepiece circuit. This means that it is important to reduce the influence of static electricity on the controller 20.

  FIG. 3 is a schematic exploded perspective view of the movement 101. In the figure, the upward direction is the back side, and the downward direction is the front side. The disc shown at the bottom is the main plate 12, and the winding stem 13 is visible on the back side in the figure. A clock circuit board 21 is arranged on the back side. In the illustrated example, the controller 20 is mounted on the front side of the timepiece circuit board 21. In addition, a rectangular notch 211 is provided at the 6 o'clock position of the timepiece circuit board 21 for accommodating the substantially rectangular planar antenna 11. A planar antenna substrate 15 is disposed on the back side of the timepiece circuit board 21. A planar antenna 11 is arranged at a position on the front side of the planar antenna substrate 15 on the front side so that the receiving surface 11a faces the front side. On the planar antenna substrate 15, a high-frequency circuit for reception by the planar antenna 11 is mounted. A circular notch 151 is provided at a position of the planar antenna substrate 15 on the 12 o'clock side, that is, on a side opposite to the notch 211 of the timepiece circuit board 21, and accommodates the substantially circular battery 10. ing.

  A metal lead plate 22 is provided on the back side of the battery 10, and the lead plate 22 is preferably welded and fixed to the back side surface of the battery 10, in this case, the negative electrode. Further, a watch circuit board contact portion 221 which is a tongue-like protrusion having spring elasticity extends from the lead plate 22 toward the front side, and is in contact with and in conduction with the watch circuit board 21. The watch circuit board contact portion 221 is also provided at two places as shown in the figure to ensure electrical connection. In making the movement 101, the battery 10 is securely insulated from the members other than the metal plate 14 and the lead plate 22, and the battery is placed between the battery 10 and the planar antenna substrate 15 in order to fix its position. A supporting battery frame may be provided. Also in the present embodiment, it is preferable to provide a battery frame, but the battery frame is not shown in FIG. 3 in order to avoid complicated illustration. The battery 10 is illustrated as a so-called button-type battery here, but the shape of the battery 10 is not particularly limited. Alternatively, the battery 10 and the above-described battery frame, lead plate 22, and other members may be inseparably combined to use the battery 10 in the form of a battery package.

  Further, a metal plate 14 is disposed on the back side of the battery 10. FIG. 3 shows a state in which the planar antenna substrate contact portion 142 extends from the metal plate 14 to the front side toward the planar antenna substrate 15 and the back cover contact portions 143 and 144 extend toward the back side. A battery retainer 141 is also shown.

  Each member constituting the movement 101 described above is sandwiched and fixed between the base plate 12 and the metal plate 14 by inserting a columnar member 23 into a hole provided in the base plate 12 and tightening a screw 231. . A widened head similar to the screw 231 is provided at the front side end of the columnar member 23 that does not appear in the figure, and does not fall off to the back side of the main plate 12. In this embodiment, the columnar member 23 and the screw 231 are made of metal and have conductivity. Further, five columnar members 23 are used in the movement 101 shown in this example, but the number and arrangement thereof are arbitrary. Furthermore, in the figure, only two screws 231 are shown for the purpose of simplifying the illustration, but naturally, the same number of screws 231 as the columnar members 23 are provided.

  FIG. 4 is a partial cross-sectional view of the movement 101 when the winding stem 13 is viewed in the axial direction. That is, the front side of the page is the 3 o'clock direction, the upper direction is the back side, the lower direction is the front side, the right direction corresponds to the 6 o'clock direction, and the left direction corresponds to the 12 o'clock direction. 4 is not a diagram showing a cross section by a specific plane, but a schematic cross sectional view showing the positional relationship of each member constituting the movement 101 in the axial direction of the winding stem 13. Therefore, members that are actually offset in the depth direction of the drawing may be shown on the same plane in FIG.

  With reference to the figure, an electrical path through which static electricity flowing from the winding stem 13 reaches the second contact B which is a contact between the movement 101 and the back cover will be described below.

  First, static electricity flowing from the winding stem 13 is transmitted to the setting lever 16 fitted in the recess of the winding stem 13, and further, a back presser 17 that presses the setting lever 16, and a first switch return spring provided on the back side thereof. It flows to 18. The first switch return spring 18 is provided with a tongue piece 181 having spring elasticity protruding toward the back side, and is electrically connected to the printed pattern provided on the surface of the watch circuit board 21 at the first contact A. ing. The printed pattern provided on the surface of the watch circuit board 21 extends in the right direction in the figure, that is, in the 6 o'clock direction, and spring elasticity protrudes toward the back side provided in the second switch return spring 19 by the third contact C. It is electrically connected with the tongue piece 191 which has. The second switch return spring 19 is in contact with the columnar member 23 shown on the right side in the drawing, and static electricity flows through the columnar member 23 to the metal plate 14. Furthermore, static electricity is discharged to the back cover by passing through the second contact B which is a contact portion between the back cover contact portion 143 provided on the metal plate 14 and the back cover.

  FIG. 5 is a cross-sectional view of the electrical path for short-circuiting the winding stem 13 described above from the winding stem 13 through the timepiece circuit board 21 to the back cover. In the figure, such an electrical path is indicated by an arrow with a thick broken line. As shown in the figure, this electrical path is one side of the straight line D (indicated by a one-dot chain line in the figure) passing through the first contact A and facing in the thickness direction, in this case, It is arranged on the right side in the figure, which is the 6 o'clock direction. On the other hand, the controller 20 is arranged on the other side with respect to the straight line D, in this case, the left side in the figure, which is the 12 o'clock direction. With this configuration, since static electricity that becomes an instantaneous large current does not pass in the vicinity of the controller 20, particularly in a position overlapping the controller 20 in the thickness direction, the influence of static electricity on the controller 20 and thus the clock circuit is suppressed. At this time, the planar antenna 11 is also arranged on the right side in the drawing, which is one side with respect to the straight line D. This is because the battery 10 and the planar antenna 11 are large in size and thick, so that they do not overlap in plan view, and are arranged at positions where they overlap each other in the thickness direction as shown in FIG. This is because the notches 211 and 151 are provided at positions on the opposite sides of the timepiece circuit board 21 and the planar antenna board 15, and the planar antenna 11 and the battery 10 are accommodated respectively. Therefore, the electrical path through which static electricity passes passes through the vicinity of the planar antenna 11. For this reason, there is a concern about the influence on reception, but reception by the planar antenna 11 is not always performed, and it is easy to try again when reception fails, so there is no practical problem. . Further, unlike the bar antenna for long wave reception, the planar antenna 11 has almost no influence on the reception performance unless a conductive member is disposed immediately above and near the reception surface 11a. It may be provided in the vicinity of the planar antenna 11 and at a position behind the receiving surface 11a. Furthermore, the position of the second contact B that short-circuits the movement 101 to the back cover is also arranged on the right side in the figure, which is one side with respect to the straight line D. Thereby, the static electricity which flowed into the metal plate 14 does not flow to the position where it overlaps in the thickness direction of the controller 20 within the surface of the metal plate 14 or the vicinity thereof.

  In the present embodiment, such an electrical path passes through the base plate 12, the timepiece circuit board 21, and the columnar member 23 that penetrates and fixes the metal plate 14. As a result, the length of the electrical path is shortened and the overall electrical resistance is reduced.

  Note that the above-described electrical path from the winding stem 13 to the back cover is not the only one, and there are other paths that pass through the watch circuit board 21, the planar antenna board 15, or other members. sell. At this time, in order to release the largest possible proportion of the static electricity flowing from the winding stem 13 to the back cover via the above-described electrical path, the path length of the electrical path is made as short as possible and the electrical resistance is reduced. It is effective to make it small.

  Therefore, the position of the second contact B, that is, the back cover contact portion 143 is not only on the right side in the drawing, which is one side with respect to the straight line D shown in FIG. 5, but also in plan view as shown in FIG. In this case, it is preferable to be provided on the side closer to the winding stem 13 than the center of the movement 101. By doing in this way, the electrical path | route which releases the static electricity which flowed in from the winding stem 13 to a back cover can be made short and a thing with small electrical resistance. In FIG. 2, the metal plate 14 is provided with a back cover contact portion 144 in addition to the back cover contact portion 143 so as to come into contact with the back cover at two locations. The back cover contact portion 144 does not actively contribute to discharging the static electricity flowing from the winding stem 13 to the back cover, but plays a role of ensuring that the back cover and the metal plate 14 have the same potential. .

  Next, a radio-controlled wristwatch 100 according to a second embodiment of the present invention will be described with reference to the drawings. In the description of this embodiment, the same reference numerals are given to members that are the same as or corresponding to the functions and configurations of the previous embodiment, and the description thereof is incorporated with the description of the previous embodiment, and redundant description is omitted. To do.

  FIG. 6 is a diagram showing an electrical path for short-circuiting from the winding stem 13 through the timepiece circuit board 21 to the back cover in the present embodiment on a partial cross-sectional view of the movement 101 in the axial direction of the winding stem 13. is there. This diagram corresponds to FIG. 5 in the previous embodiment.

  In the present embodiment, as shown in FIG. 6, the arrangement of the setting lever 16, the back presser 17, and the tongue piece 181 of the first switch return spring 18 is provided opposite to the position of the winding stem 13. In this way, the electrical path from the winding stem 13 through the timepiece circuit board 21 to the back cover has an electrical path from the winding stem 13 to the setting lever 16, and the back presser 17 toward the 6 o'clock direction, which is the right direction in the figure. The first switch return spring 18 is passed through the first contact A that conducts the tongue piece 181 and the watch circuit board 21 to the watch circuit board 21 in order, and further, the tongue piece 191 and the watch circuit board 21 are connected to each other. Is connected to the metal plate 14 through the second switch return spring 19 and the columnar member 23 through the third contact C, and is connected from the back cover contact portion 143 to the back cover through the second contact B. Such an electrical path is indicated by an arrow with a thick broken line in the figure. In such an electrical path, since the first contact A is farther from the controller 20 than the position of the winding stem 13 and becomes a position on the planar antenna side, static electricity flowing from the winding stem 13 flows in the vicinity of the controller 20. In addition, the electrostatic resistance is further improved as compared with the previous embodiment. In the electrical path in this embodiment, the position of the winding stem 13 is closest to the controller 20 when the winding stem 13 is viewed in the axial direction. Therefore, when considering a straight line E (shown by a one-dot chain line in the figure) passing through the winding stem 13 and facing the thickness direction, such an electrical path is one side with respect to the straight line E, in this case 6 o'clock. It will be placed on the middle right side. The controller 20 is arranged on the other side with respect to the straight line E, in this case, the left side in the figure, which is the 12 o'clock direction, and the planar antenna 11 is arranged on the right side in the figure, which is one side with respect to the straight line E. It will be. Other points, for example, the point where the second contact B is arranged on the right side in the figure, which is one side with respect to the straight line E, and the second contact B is the center of the movement 101 in plan view as shown in FIG. The point closer to the winding stem 13, the point where such an electrical path passes through the columnar member 23, and the battery 10 and the planar antenna 11 do not overlap in a plan view, but overlap in the thickness direction. The point is the same as in the previous embodiment.

  The specific configuration shown in the embodiment described above is an exemplification, and those skilled in the art may make various modifications. For example, the shape and number of each member or part thereof may be changed as appropriate, and need not be the same as illustrated. For example, in the first and second embodiments described above, the second contact B is formed by the back cover contact portion 143, but the conduction between the metal plate 14 and the case is not necessarily made to the back cover. Alternatively, the second contact B may be formed on the body 1.

  In one aspect of the embodiment of the present invention described above, the second contact for conducting the movement to the case is disposed on the one side with respect to the straight line when viewed in the axial direction of the winding stem. . Thereby, generation | occurrence | production of malfunctioning when the static electricity which flowed in from the winding stem escapes to a case can be reduced.

  Moreover, in another viewpoint of embodiment of this invention, a 2nd contact is arrange | positioned in the planar view near the winding stem from the center of a movement. Thereby, generation | occurrence | production of the malfunction when the static electricity which flowed in from the winding stem escapes to a case can be reduced further.

  Further, in another aspect of the embodiment of the present invention, there is provided a columnar member that penetrates and fixes a ground plate, a clock circuit board, a planar antenna board, and a metal plate provided with a second contact, The target path passes through the columnar member. In this way, the electrical path can be shortened and the electrical resistance can be suppressed.

  In another aspect of the embodiment of the present invention, the movement includes a battery that is arranged so as not to overlap with the planar antenna in a plan view and to overlap with the planar antenna in a thickness direction in the axial direction of the winding stem. . In this way, a large battery and a planar antenna can be accommodated in a compact case.

  1 body, 2 dial, 3 hour hand, 4 minute hand, 5 second hand, 6 crown, 7 push button, 8 band fixing part, 9 back cover, 10 battery, 11 planar antenna, 11a receiving surface, 11b feeding pin, 12 ground plate, 13 winding stem, 14 metal plate, 15 planar antenna board, 16 setting lever, 17 back presser, 18 first switch return spring, 19 second switch return spring, 20 controller, 21 clock circuit board, 22 lead plate, 23 pillar shape Member, 100 radio wave watch, 101 movement, 141 battery holding part, 142 flat antenna board contact part, 143, 144 back cover contact part, 151 notch, 181 tongue piece, 191 tongue piece, 211 notch, 221 watch circuit board contact Part, 231 screws.

Claims (5)

Makishin to which the crown is attached,
A timepiece circuit board, on which a timepiece circuit is mounted and which is conducted by the winding stem and the first contact;
A planar antenna substrate on which a planar antenna is mounted;
A radio-controlled wristwatch that accommodates a movement having a metal back case.
When viewed in the axial direction of the winding stem, the electrical path that short-circuits from the winding stem to the case through the watch circuit board and the planar antenna are oriented in the thickness direction passing through the first contact or the winding stem. A radio-controlled wristwatch arranged on one side with respect to a straight line, and wherein the timepiece circuit is arranged on the other side with respect to the straight line.   2. The radio-controlled wristwatch according to claim 1, wherein a second contact for conducting the movement to the case is disposed on the one side with respect to the straight line when viewed in the axial direction of the winding stem.   The radio-controlled wristwatch according to claim 2, wherein the second contact point is disposed closer to the winding stem than the center of the movement in a plan view. A columnar member that penetrates and fixes a base plate, the timepiece circuit board, the planar antenna board, and a metal plate provided with the second contact;
The radio-controlled wristwatch according to claim 2 or 3, wherein the electrical path passes through the columnar member. The said movement has a battery arrange | positioned so that it may not overlap with the said planar antenna in planar view, and it may overlap with the said planar antenna in the thickness direction in the axial direction view of the said winding stem. Radio watch.

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