JP2019215169A - Radio wave clock - Google Patents

Abstract

To provide a radio wave clock that can achieve both ensuring of excellent antenna sensibility and ensuring of excellent aesthetic property.SOLUTION: A radio wave clock 1 has: an antenna 14 that is provided on a rear face side of a dial plate with respect to an axial line direction, and receives a radio wave from an outside of an exterior case; and a solar cell 9 that is provided between the dial plate and the antenna 14 with respect to the axial line direction, and converts an optical energy into an electric energy. The solar cell 9 has a notch part 92 that is located facing the antenna 14 in the axial line direction, and has a side 92a along a peripheral direction Z with a clock center axial line X1 as a center formed into an arch with the clock center axial line X1 as the center.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a radio-controlled timepiece.

  2. Description of the Related Art As a conventional radio timepiece, for example, a radio timepiece having a function of receiving a radio wave including time information such as a satellite radio wave via an antenna and correcting the internal time of its own device is known. Further, as a conventional radio timepiece, for example, a radio timepiece provided with means for converting light energy into electric energy is also known (see Patent Documents 1 and 2).

JP-A-2015-127715 JP 2014-240845 A

  By the way, the above-mentioned radio timepiece has room for further improvement, for example, in terms of compatibility between good antenna sensitivity and good aesthetics.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a radio controlled watch that can ensure both good antenna sensitivity and good aesthetics.

  In order to achieve the above object, a radio controlled timepiece according to the present invention includes an outer case, a dial provided inside the outer case, and the dial set with respect to an axial direction along a clock center axis of the outer case. Antenna provided on the back side of the, and a solar cell provided between the dial and the antenna with respect to the axial direction, the solar cell facing the antenna along the axial direction It is characterized in that a side along a peripheral direction around the center axis of the clock has a notch formed in an arc shape centered on the center axis of the clock.

  In the above-mentioned radio timepiece, the notch may be formed so that at least a part of a side along a direction intersecting with the surrounding direction is formed along a radial direction orthogonal to the clock center axis. .

  Further, in the radio timepiece, the dial includes an index provided along the radial direction and indicating time, and the cutout portion has a side formed along the radial direction along the axial direction. It may be located opposite to the index.

  Further, in the radio timepiece, the antenna includes a radiation electrode that receives a radio wave, and a power supply unit that supplies power to the radiation electrode, and the solar cell includes the cutout portion having the radiation electrode along the axial direction. , And the end on the side of the notch portion may be located to face the power supply portion along the axial direction.

  In the above-mentioned radio timepiece, the solar cell may have an insulating cutting region extending from the notch portion to a side opposite to the clock center axis side and penetrating therethrough.

  In the above-mentioned radio timepiece, a magnetic field-resistant plate is provided inside the outer case and located within the range of the antenna with respect to the axial direction and shields an external magnetic field, and the magnetic field-resistant plate extends along the axial direction. When viewed, a part thereof may protrude toward the notch.

  In the above-mentioned radio timepiece, the antenna may be a planar monopole antenna.

  The radio timepiece according to the present invention can receive an external radio wave by an antenna provided on the back side of the dial inside the outer case. Further, the radio-controlled timepiece can generate electric power by converting light energy into electric energy by a solar cell provided between the dial and the antenna inside the outer case. In this configuration, the radio timepiece is provided with a notch at a position facing the antenna along the axial direction in the solar cell. According to this configuration, the antenna of the radio timepiece can appropriately receive an external radio wave through the cutout portion, and can secure good antenna sensitivity. Then, in the notch portion, the side along the circumferential direction around the center axis of the clock is formed in an arc shape around the center axis of the clock. With this configuration, when viewed from the dial side, the radio-controlled timepiece can make the boundary of the cutout portion of the solar cell less noticeable, so that good aesthetics can be secured. As a result, the radio timepiece has an effect that it is possible to ensure both good antenna sensitivity and good aesthetics.

FIG. 1 is a front view illustrating a schematic configuration of the radio-controlled timepiece according to the first embodiment. FIG. 2 is a cross-sectional view (a cross-sectional view taken along the line AA shown in FIG. 1) illustrating a schematic configuration of the radio-controlled timepiece according to the first embodiment. FIG. 3 is a schematic perspective view illustrating a schematic configuration of the antenna of the radio-controlled timepiece according to the first embodiment. FIG. 4 is a schematic plan view illustrating a schematic configuration of a solar cell of the radio-controlled timepiece according to the first embodiment. FIG. 5 is a schematic plan view illustrating a schematic configuration of a solar cell of the radio-controlled timepiece according to the second embodiment. FIG. 6 is a schematic plan view illustrating a schematic configuration of a solar cell of a radio controlled timepiece according to a modification of the second embodiment. FIG. 7 is a schematic plan view illustrating a schematic configuration of a solar cell of the radio-controlled timepiece according to the third embodiment. FIG. 8 is a schematic plan view illustrating a schematic configuration of a solar cell of a radio-controlled timepiece according to a modification of the third embodiment. FIG. 9 is a schematic plan view illustrating a schematic configuration of a solar cell of a radio-controlled timepiece according to a modification of the third embodiment. FIG. 10 is a schematic plan view illustrating a schematic configuration of a solar cell of a radio controlled timepiece according to a modification.

  Embodiments according to the present invention will be described below in detail with reference to the drawings. In addition, this invention is not limited by this embodiment. In addition, constituent elements in the following embodiments include those that can be easily replaced by those skilled in the art or those that are substantially the same. 4 to 10 which will be described below, the through-holes and detailed shapes of the output rotation shaft are omitted and simplified. 4 to 10 show the antenna position (10.5 o'clock position) so as to be located on the upper side in the figure for easy understanding of the main part.

[Embodiment 1]
An electronic timepiece 1 according to the present embodiment shown in FIGS. 1 and 2 has a function of receiving a radio wave including time information such as a satellite wave and correcting the internal time of the watch based on the acquired time information. It is a clock. The radio-controlled timepiece 1 of the present embodiment typically receives a GPS radio wave output from a GPS (GLOBAL POSITIONING SYSTEM) satellite. Note that the GPS radio wave is a radio wave including GPS time information, and for example, two types of 1.5 GHz band (1575.42 MHz) and 1.2 GHz band (1227.60 MHz) are used. Here, the radio-controlled timepiece 1 is an analog electronic timepiece that displays time using physical hands 6. Hereinafter, each configuration of the radio-controlled timepiece 1 will be described in detail with reference to the drawings.

  In the following description, the direction along the clock center axis X1 of the radio-controlled timepiece 1 is referred to as “axial direction X”, the direction orthogonal to the clock center axis X1 is referred to as “radial direction Y”, and the clock center axis X1 is referred to as “radial direction Y”. The circumferential direction around the center is referred to as “surrounding direction Z”. The axial direction X corresponds to the up-down direction of the radio-controlled timepiece 1, and one side is referred to as “front side” and the other side is referred to as “back side”. In the radial direction Y, a side closer to the clock center axis X1 is referred to as “inside”, and a side farther from the clock center axis X1 is referred to as “outside”. Here, the clock center axis X <b> 1 is a reference axis set in advance with respect to the radio-controlled timepiece 1, and corresponds to a central axis of a main configuration of the radio-controlled timepiece 1. The center axis X1 of the watch typically corresponds to the center axis of the movement MM1 and the outer case 2. The clock center axis line X1 corresponds to an axis passing through the geometric center of gravity of the shape of the movement MM1 and the outer case 2, and for example, when the outer shape of the movement MM1 and the inner shape of the outer case 2 are cylindrical. Corresponds to the central axis of the cylindrical shape. Further, the clock center axis X1 typically coincides with the rotation axis of the main hands (in FIG. 1, the second hand 61, minute hand 62, and hour hand 63 described later).

  Specifically, the radio-controlled timepiece 1 includes an outer case 2, a windshield 3, a dial 4, a dial ring 5, a pointer 6, an operation unit 7, and a movement MM1. In the radio-controlled timepiece 1, a movement MM 1 is accommodated in an accommodation space 24 formed inside an outer case 2, a dial 4, a dial ring 5, and a pointer 6 are assembled. 5, the pointer 6 and the like are protected.

  The outer case 2 constitutes the outermost shell of the radio-controlled timepiece 1. The outer case 2 is formed of, for example, a conductive material such as titanium or a titanium alloy. Further, the outer case 2 may be formed of a non-conductive material such as ceramics, glass, and resin. The outer case 2 includes a main body 21, a back cover 22, and a can 23. In the present embodiment, the main body portion 21 has a divided structure of two members like a combination of a bezel portion and a body portion, and the two members are combined to form a substantially cylindrical shape centered on the clock center axis X1. Be composed. The main body 21 is open at both ends in the axial direction X. The back cover 22 is a member that closes an opening on the back side of the main body 21 in the axial direction X. The back cover 22 is formed separately from the main body 21 and is formed in a substantially disk shape centering on the clock center axis X1. The can 23 is formed to protrude from the outer peripheral surface of the main body 21. The can 23 is formed integrally with the main body 21. A plurality of cans 23 are provided. The belt 23 is connected to the can 23. The belt 25 is a member wound around an arm or the like and worn.

  The windshield 3 is a member that is assembled to the main body 21 and closes an opening on the front surface side in the axial direction X of the main body 21. The windshield 3 is formed of a light transmitting portion material that transmits light, more specifically, a transparent material such as glass. The windshield 3 is formed in a substantially disk shape centered on the clock center axis X1. This allows the windshield 3 to allow the inside of the main body 21 (the exterior case 2) to be visually recognized and to protect components disposed inside.

  Here, the accommodation space 24 is a closed space formed inside the outer case 2 by the outer case 2 (the main body 21 and the back cover 22) and the windshield 3 assembled to the outer case 2. In the present embodiment, the housing space 24 is formed inside the main body 21 as a substantially cylindrical space centered on the clock center axis X1. The housing space portion 24 includes, from the rear side (the back cover 22 side) to the front side (the windshield 3 side) along the axial direction X, the respective components are composed of the movement MM1, the dial 4, the dial ring 5, and the hands 6. They are arranged in order.

  The dial 4 is arranged on the front side of the movement MM1 in the axial direction X and at a position facing the windshield 3 so as to be visible through the windshield 3. The shape of the dial 4 is the same as or similar to the inner peripheral shape of the main body portion 21, and in the present embodiment, is formed in a substantially disk shape centered on the clock center axis X <b> 1. The dial 4 is formed of a light transmitting portion material that transmits light at a predetermined transmittance. The dial 4 is formed of an insulating material such as a synthetic resin. The dial 4 includes an index 41 and a date window 42. The index 41 is a scale indicating time and indicated by the hands 6. A plurality of indices 41 are arranged at equal intervals along the circumferential direction Z on the front surface of the dial 4 in the axial direction X. Each index 41 may be a projecting member or may be printed on the dial 4. Each index 41 is provided extending in the radial direction Y. The date window 42 is an opening for making a part of characters on the date indicator 12 described later visible. The date window 42 is formed penetrating the dial 4 along the axial direction X.

  The dial ring 5 is a member that presses the peripheral portion of the dial 4 and holds the dial 4 at a predetermined position. The dial ring 5 is formed in a substantially annular shape about the center axis X1 of the clock. The dial ring 5 is provided on the front side of the dial 4 in the axial direction X, and holds the dial 4 between itself and the movement MM1.

  The pointer 6 is a display member that displays information such as time by pointing to the index 41 of the dial 4, and constitutes a clock operation unit. The hands 6 are formed in a needle shape, and a plurality of hands 6 are provided on the front side of the dial 4 in the axial direction X. The plurality of hands 6 include a second hand 61, a minute hand 62, an hour hand 63, and a small hand 64. The second hand 61, the minute hand 62, and the hour hand 63 constitute a main hand rotatably provided on the outer case 2 about the main hand rotation axis X <b> 2 as a center of rotation. The main needle rotation axis X2 coincides with the clock center axis X1. The second hand 61, the minute hand 62, and the hour hand 63 are arranged coaxially. The second hand 61, the minute hand 62, and the hour hand 63 rotate around the main hand rotation axis X2 as a rotation center. On the other hand, the small hand 64 constitutes a sub-hand provided rotatably on the outer case 2 about the sub-needle rotation axis X3 as a rotation center. The auxiliary needle rotation axis X3 is different from the main needle rotation axis X2, and is located parallel to the clock center axis X1 and shifted from the clock center axis X1. Here, a plurality of small needles 64 are provided, two are provided rotatably about a common auxiliary needle rotation axis X3, and the other are provided rotatably about different auxiliary needle rotation axes X3. . Further, here, each small hand 64 rotates around each auxiliary hand rotation axis X3 as a rotation center.

  The operation unit 7 is a unit that receives an external operation. The operation unit 7 is provided so as to be exposed to the outside from the main body 21 of the outer case 2. The operation unit 7 of the present embodiment includes a crown 71, push buttons 72 and 73, and the like. The operation unit 7 receives various operations in conjunction with a mechanism in the movement MM1 in accordance with a pull-out / rotation operation on the crown 71 and a pressing operation on the push buttons 72 and 73.

  The movement MM <b> 1 is a power mechanism that is housed in the housing space 24 and drives the radio-controlled timepiece 1. The movement MM1 includes a battery 8, a solar cell 9, a motor 10, a wheel train 11, a date wheel 12, a substrate 13, an antenna 14, a front magnetic-resistant plate 15, and a rear magnetic-resistant plate 16, and these are various components. Are assembled to each other via the member (1) to constitute one structural module. The movement MM <b> 1 is arranged such that, in the accommodation space 24, from the rear side (the back cover 22 side) to the front side (the dial 4 side) along the axial direction X, the back side anti-magnetic plate 16, the substrate 13, and the front side anti-magnetic plate 15, the date wheel 12, and the solar cell 9 are arranged in this order. In the movement MM1, the battery 8 is arranged adjacent to the front side of the back cover 22 in the axial direction X. In the movement MM1, the motor 10 and the antenna 14 are mounted on the mounting surface on the front side of the substrate 13 in the axial direction X. Further, in the movement MM1, a wheel train 11 is interposed between the motor 10 and the hands 6, and these are connected via the wheel train 11.

  The battery 8 is a power source of the radio-controlled timepiece 1 and is provided in the housing space 24. The battery 8 is, for example, a secondary battery such as a lithium ion battery, and is charged by power generated by a solar cell 9 described later. In this embodiment, the battery 8 is formed in a substantially disk shape (button shape), and is arranged so as to be adjacent to the front surface of the back cover 22 in the axial direction X. The battery 8 is charged by the power generated by the solar cell 9 via the substrate 13 (or another substrate (not shown)). The battery 8 supplies the stored power to each part of the radio timepiece 1 including the motor 10.

  The solar cell 9 is a power source of the radio-controlled timepiece 1 and converts light energy into electric energy. The solar cell 9 is provided on the back side of the dial 4 with respect to the axial direction X in the accommodation space 24, here, between the dial 4 and the antenna 14. More specifically, the solar cell 9 is located at the forefront side in the axial direction X in the movement MM1, and is provided between the dial 4 and the date wheel 12 in the axial direction X. The solar cell 9 has a power generation main body 91 formed in a substantially disc shape with the clock center axis X1 as a center, and the power generation main body 91 converts light energy into electric energy. The power generated by the solar cell 9 may be directly supplied to each part of the radio-controlled timepiece 1 or may be supplied to the battery 8 to charge the battery 8.

  The motor 10 is a power generation source of the radio-controlled timepiece 1 and generates power for operating each unit. The motor 10 is provided on the back side of the dial 4 in the axial direction X in the housing space 24. Here, the motor 10 is arranged on the front side of the substrate 13 in the axial direction X. As the motor 10, for example, a stepping motor can be used, and the rotating power is rotated by rotating the rotor with respect to the stator by a magnetic field generated by the coil unit according to the power supplied from the battery 8 or the solar cell 9. Then, the hands 6, the date dial 12 and the like are rotationally driven. The motor 10 may be provided separately for the plurality of hands 6 and the date indicator 12, or may be shared by some hands 6 and the date indicator 12.

  The wheel train 11 is a mechanism for transmitting the rotational power generated by the motor 10 to a rotationally driven object. The object to be rotationally driven by the wheel train 11 is typically the hands 6, but may include the date indicator 12. The wheel train 11 is provided on the back side of the dial 4 in the axial direction X in the accommodation space 24. The wheel train 11 is provided so as to be interposed between the motor 10 and the hands 6 and to connect them. The wheel train 11 is configured to include a power transmission member such as a gear and a rotating shaft. The final output rotating shaft 11a penetrates the dial 4 along the axial direction X, and the hands 6 are provided. The wheel train 11 moves the hands 6 by decelerating the rotation power generated by the motor 10 and transmitting the rotation power to the hands 6 to rotate the hands. The wheel train 11 may be provided individually for a plurality of hands 6, or may be shared by some hands 6.

  The date indicator 12 is a display member for displaying a date, and constitutes a clock operation unit. The date indicator 12 is provided in the accommodation space 24 so as to be rotatable around a date indicator rotation axis parallel to the clock center axis X1. The date indicator 12 is provided on the back side of the dial 4 in the axial direction X in the accommodation space 24. More specifically, the date indicator 12 is provided between the solar cell 9 and the front-side anti-magnetic plate 15 in the housing space 24 in the axial direction X. Here, at least a part of the date indicator 12 is located within the range of the antenna 14 with respect to the axial direction X, and at least a part thereof is disposed substantially in the same layer as the antenna 14. The date dial 12 is formed in a substantially annular plate shape. The date indicator 12 is formed of an insulating material such as a synthetic resin. In the date indicator 12, a plurality of characters of a series of characters for identifying a calendar are formed at equal intervals in the circumferential direction. The date indicator 12 is driven by the motor 10 to rotate around the date indicator rotation axis as a center of rotation, and displays a date when the position exposed from the date window 42 changes.

  The substrate 13 includes a wiring pattern made of a conductive member on the surface or inside, and controls an electronic circuit, an oscillating circuit, a motor 10, an antenna 14, and a receiving circuit (a receiving circuit described later with reference to FIG. 3). RX)). Here, the substrate 13 is formed in a substantially disk shape centered on the clock center axis X1, and has a cutout portion corresponding to a region where the battery 8 is arranged. The substrate 13 is provided on the back side of the dial 4 in the axial direction X in the accommodation space 24. More specifically, the substrate 13 is provided between the front-side anti-magnetic plate 15 and the rear-side anti-magnetic plate 16 with respect to the axial direction X in the accommodation space 24. Here, the electronic circuit and the receiving circuit may be mounted on either the front surface or the rear surface of the substrate 13, but the motor 10 and the antenna 14 are preferably arranged on the front surface side. The electronic circuit includes various circuits for measuring time (internal time of the clock), controlling the motor 10 based on the measured time, rotating the hands 6 and the date indicator 12, and moving the hands. The displayed time is displayed on the hands 6 and the date indicator 12 as the current time.

  The antenna 14 receives a radio wave from outside the outer case 2. The antenna 14 constitutes a communication antenna for receiving a space electromagnetic wave (radio wave). The antenna 14 is mounted on the mounting surface on the front side of the substrate 13 on the back side of the dial 4 in the axial direction X in the accommodation space 24. Here, the antenna 14 is arranged outside the date wheel 12 in the radial direction Y. The antenna 14 of the present embodiment will be described as an example of a planar monopole antenna.

  Specifically, as illustrated in FIG. 3, the antenna 14 of the present embodiment includes, as an example, a dielectric 14a, a radiation electrode 14b, a short-circuit portion 14c, and a feed portion 14d. The antenna 14 of the present embodiment constitutes a planar monopole antenna.

  The dielectric 14a is a part that forms the base of the antenna 14. The dielectric 14a is formed in a three-dimensional shape, here, a substantially rectangular parallelepiped shape. The dielectric 14a is formed of a material having superiority in conductivity to conductivity, for example, a non-conductive ceramic or the like. The dielectric 14a is made of a material having a high dielectric constant such as zirconia or titanium oxide, and has a wavelength shortening effect. The dielectric 14a can make the substantial wavelength λ 'of the radio wave received by the radiation electrode 14b smaller than the wavelength λ corresponding to the frequency of the GPS radio wave. The dielectric 14a has an effect of increasing the electrical distance between the substrate 13 and the radiation electrode 14b.

  The radiation electrode 14b is a part that receives a radio wave. The radiation electrode 14b is provided on an electrode arrangement surface 14e which is a front surface (front surface) of the dielectric 14a. The radiation electrode 14b is a substantially rectangular flat plate-shaped component formed of a conductive material such as a metal. The radiation electrode 14b is arranged on the electrode arrangement surface 14e so as to cover most of the area of the electrode arrangement surface 14e and expose the edge of the electrode arrangement surface 14e in a U-shape. More specifically, the radiation electrode 14b is provided on the electrode placement surface 14e in such a manner that a region on one end side in the radial direction Y and a region on both ends in the width direction W on the electrode placement surface 14e are exposed. Here, the width direction W of the antenna 14 is a direction orthogonal to the axial direction X and the radial direction Y. The dielectric 14a of the present embodiment is formed in a substantially rectangular parallelepiped shape such that the radial direction Y is along the short side and the width direction W is along the long side. Each side of the radiation electrode 14b is parallel to each side of the electrode arrangement surface 14e. The radiation electrode 14b may be provided so that the electrode arrangement surface 14e is not exposed, that is, so as to cover the entire electrode arrangement surface 14e. Each side of the radiation electrode 14b is not parallel to each side of the electrode arrangement surface 14e, and may have a predetermined inclination. Each side of the radiation electrode 14b may be not a straight line but a meander shape.

  The radiation electrode 14b has a pair of first radiation sides 14f and a second radiation side 14g. The radiation side 14f is an edge portion where the current density is concentrated on the radiation electrode 14b of the antenna 14. The pair of radiation sides 14f are sides along the radial direction Y of the radiation electrode 14b. The pair of radiation sides 14f are parallel or substantially parallel to each other. The radiation side 14g is a side substantially orthogonal to the radiation side 14f of the radiation electrode 14b, in other words, a side along the width direction W. The substantial antenna length of the radiation electrode 14b corresponds to the length of the side from the connection portion 14h to the short-circuit portion 14c to the radiation side 14g, in other words, the length of the radiation side 14f. The radiation electrode 14b is formed, for example, so that the antenna length becomes さ と of the substantial wavelength λ ′ after shortening.

  The short-circuit portion 14c is a portion that electrically connects the end of the radiation electrode 14b to the ground layer GND provided on the front side of the substrate 13. Here, the ground layer GND is electrically connected to the outer case 2 by direct contact or capacitive coupling. The ground layer GND is formed at a position facing the radiation electrode 14b along the axial direction X. The short-circuit part 14c is provided on one side surface 14i in the radial direction Y of the dielectric 14a. The side surface 14i is a surface that faces inward in the radial direction Y in the dielectric 14a in a state where the antenna 14 is mounted on the substrate 13. The short-circuit portion 14c is a substantially rectangular plate-shaped component portion formed of a conductive material such as a metal. The short-circuit portions 14c of the present embodiment are provided as a pair so as to expose both ends in the width direction W on the side surface 14i. The pair of short-circuit portions 14c are provided on the side surface 14i at intervals along the width direction W. Each short-circuit portion 14c extends from the upper end (front end) to the lower end (back end) of the side surface 14i along the axial direction X. Each short-circuit portion 14c has an upper end connected to the radiation electrode 14b via a connection portion 14h, and is electrically connected to the radiation electrode 14b. The lower end of each short-circuit portion 14c is electrically connected to the ground layer GND.

  The power supply unit 14d is a part that supplies power to the radiation electrode 14b, and is a part that electrically connects an end of the radiation electrode 14b and the receiving circuit RX. The power supply unit 14d of the present embodiment constitutes a direct power supply unit that supplies power to the radiation electrode 14b by direct power supply. The power supply unit 14d is provided on the same surface of the dielectric 14a as the surface on which each short-circuit unit 14c is provided, that is, on the side surface 14i. The power supply portion 14d is a substantially rectangular flat plate-shaped component portion formed of a conductive material such as a metal. The power supply section 14d of the present embodiment is provided between the pair of short-circuit sections 14c in the width direction W. That is, the pair of short-circuit portions 14c are arranged on both sides of the power supply portion 14d with the power supply portion 14d interposed therebetween in the width direction W on the side surface 14i. The power supply portion 14d extends from the upper end (front end) to the lower end (back end) of the side surface 14i along the axial direction X, similarly to the short-circuit portions 14c. The pair of short-circuit portions 14c and the power supply portion 14d extend along the virtual plane S1. The virtual plane S1 is a plane parallel to the clock center axis X1 of the outer case 2. The power supply section 14d has an upper end connected to the radiation electrode 14b via the connection section 14h, and is electrically connected to the radiation electrode 14b, similarly to the short-circuit sections 14c. Here, the pair of short-circuit portions 14c and the power supply portion 14d are connected to each other at an end on the radiation electrode 14b side, that is, an end on the connection portion 14h side. The lower end of the power supply unit 14d is electrically connected to the receiving circuit RX. The power supply portion 14d has a depth (a length along the axial direction X in FIG. 3) and a width (a length along the width direction W in FIG. 3) of the slit SL formed by the power supply portion 14d and the pair of short-circuit portions 14c. Is adjusted to achieve impedance matching. Further, a matching circuit may be provided between the antenna 14 and the receiving circuit RX. In particular, the connection between the power supply unit 14d and the receiving circuit RX is desirably constituted by a microstrip line.

  In the antenna 14 configured as described above, the short-circuit portion 14 c and the feed portion 14 d face inward in the radial direction Y, and the surface of the dielectric 14 a on the side opposite to the radiation electrode 14 b side is the ground layer GND of the substrate 13. Are mounted on the substrate 13 in such a positional relation as to contact the substrate 13. At this time, the antenna 14 is provided so that each short-circuit portion 14c and the ground layer GND are electrically connected, while the power supply portion 14d and the ground layer GND are not electrically connected and are connected to the receiving circuit RX. In this state, the radiation electrode 14b extends outward in the radial direction Y from the pair of short-circuit portions 14c and the power supply portion 14d. In other words, the radiation electrode 14 b extends in the radial direction Y from the pair of short-circuit portions 14 c and the power supply portion 14 d toward the inner wall surface of the outer case 2. The power supply section 14d and the radiation electrode 14b of the present embodiment are physically connected as described above. That is, the antenna 14 of the present embodiment is supplied with power by direct power supply to the radiation electrode 14b via the power supply unit 14d. Here, the center of the radiating side 14g in the width direction W is a place where the fluctuation of the potential is smaller than that of the end in the width direction W adjacent to the radiating side 14f. Therefore, the influence on the receiving sensitivity of the radiation electrode 14b tends to be relatively small. Here, the antenna 14 has a configuration in which each radiation side 14f, which tends to have a relatively large effect on the reception sensitivity of the radiation electrode 14b, extends in the radial direction Y and is almost perpendicular to the inner wall surface of the outer case 2. They are arranged in the accommodation space 24 in such a positional relationship as to intersect (see also FIG. 4). With this configuration, the antenna 14 can suppress capacitive coupling with the exterior case 2 and can suppress a decrease in reception sensitivity. Note that the ground layer GND extends to the inner side in the radial direction Y than the antenna 14. In other words, the ground layer GND extends in the radial direction Y to the side opposite to the radiation electrode 14b with the short-circuit portion 14c interposed therebetween. The radio timepiece 1 is configured as described above, so that the inside in the radial direction of the antenna 14 is a so-called image antenna area. The image antenna is a virtual antenna and forms a pair with the antenna 14 that is a planar monopole antenna. It is considered that the image antenna is generated on the side opposite to the radiation electrode 14b side with respect to each short-circuit portion 14c. The image antenna is generated in a symmetrical shape at a position symmetrical to the antenna 14 with respect to each short-circuit portion 14c. The radio-controlled timepiece 1 can improve the reception sensitivity of the antenna 14 by the image antenna.

  In the above description, the ground layer GND is arranged at a position facing the radiation electrode 14b on the front side of the substrate 13, but the ground layer GND may not be provided at a position facing the radiation electrode 14b. By separating the radiation electrode 14b from the ground layer GND, the reception sensitivity of the antenna 14 can be improved. However, in order to electrically connect the short-circuit portion 14c and the ground layer GND, or to improve the mounting strength when mounting the antenna 14 on the substrate 13, the substrate 13 is provided at a position facing the radiation electrode 14b. A ground layer GND may be provided in the vicinity where the short-circuit portion 14c is arranged. Further, a ground layer GND may be provided as a mounting area for the antenna 14 in other places.

  Returning to FIG. 2, the front-side anti-magnetic plate 15 and the rear-side anti-magnetic plate 16 are used to shield an external magnetic field from outside the outer case and prevent the coil portion of the motor 10 from being affected by magnetic flux. It is a shielding plate (shield). The front-side anti-magnetic plate 15 and the rear-side anti-magnetic plate 16 are formed in a plate shape using a conductive material such as a metal. The front-side anti-magnetic plate 15 constitutes a first anti-magnetic plate provided on the rear side of the date dial 12 with respect to the axial direction X in the accommodation space 24 and on the front side of the motor 10. The front-side anti-magnetic plate 15 is located on the back side of the electrode arrangement surface 14e of the antenna 14 with respect to the axial direction X. The front-side anti-magnetic plate 15 is provided at a portion that does not overlap with the antenna 14 when viewed along the axial direction X (hereinafter, may be referred to as “axial view”, in other words, corresponds to “plan view”). ing. Here, the front-side anti-magnetic plate 15 is entirely located within the range of the antenna 14 with respect to the axial direction X, and is disposed in substantially the same layer as the antenna 14. On the other hand, the rear-side anti-magnetic plate 16 constitutes a second anti-magnetic plate provided adjacent to the back cover 22 on the front side of the back cover 22 in the axial direction X in the accommodation space 24. The rear-side anti-magnetic plate 16 is located on the rear side of the antenna 14 with respect to the axial direction X. The rear-side anti-magnetic plate 16 is provided in a portion that does not overlap with the battery 8 when viewed in the axial direction. The rear-side anti-magnetic plate 16 is entirely located within the range of the battery 8 in the axial direction X, and is disposed in substantially the same layer as the battery 8. The front anti-magnetic plate 15 and the rear anti-magnetic plate 16 are located opposite to each other with respect to the axial direction X with the motor 10 and the substrate 13 interposed therebetween. With these configurations, the radio-controlled timepiece 1 is reduced in thickness while appropriately suppressing the influence of an external magnetic field on the coil portion and the like of the motor 10. In addition, the front-side anti-magnetic plate 15 and the rear-side anti-magnetic plate 16 are not limited to the above arrangement. For example, the rear-side anti-magnetic plate 16 may be provided also in a portion overlapping the battery 8 when viewed in the axial direction, and may be disposed so as to cover the entire rear side of the battery 8 in the axial direction X.

  In the radio timepiece 1 configured as described above, the time (internal time of the timepiece) is measured by the oscillation circuit and the electronic circuit, and the rotation of the hands 6 and the date dial 12 is controlled by controlling the motor 10 based on the time. Is done. As a result, the radio-controlled timepiece 1 can display the time, date, and the like according to the relative positional relationship between the hands 6 and the date dial 12 with respect to the dial 4. Further, the radio-controlled timepiece 1 can receive a radio wave including time information such as a satellite radio wave via the antenna 14 and correct the time inside the clock based on the received radio wave by a receiving circuit and an electronic circuit.

  As shown in FIG. 4, the radio controlled timepiece 1 of the present embodiment is provided with a notch 92 having a predetermined shape in the solar cell 9 to ensure good antenna sensitivity and good aesthetics. A balance has been achieved.

  Specifically, the solar cell 9 of the present embodiment has a cutout portion 92 provided in the power generation main body 91 in addition to the power generation main body 91 described above. The notch 92 is located to face the antenna 14 along the axial direction X (see also FIG. 2). In other words, the cutout portion 92 is formed at a position facing the antenna 14 when viewed in the axial direction (in plan view). Here, the antenna 14 is disposed at a position corresponding to 10.5 o'clock on the dial 4, and the cutout portion 92 is provided at a position corresponding to 10.5 o'clock.

  More specifically, in the solar cell 9, the cutout portion 92 is located to face the radiation electrode 14 b of the antenna 14 along the axial direction X. That is, the cutout portion 92 is formed in the power generation main body portion 91 at a position facing the radiation electrode 14b of the antenna 14 along the axial direction X. The cutout portion 92 is formed in a size and a shape facing substantially the entire radiation electrode 14b along the axial direction X. Here, at least the notch portion 92 faces the radiation sides 14f and 14g of the antenna 14 along the axial direction X, and the power generation main body 91 does not overlap with the radiation sides 14f and 14g of the antenna 14 when viewed in the axial direction. It is formed in a shape.

  In addition, the solar cell 9 is configured such that the end of the power generation main body 91 on the side of the cutout portion 92 (the end forming a side 92 a to be described later) extends along the axial direction X along the feed portion 14 d of the antenna 14 (see FIG. 4). (Also schematically shown in FIG. 2), thereby forming an overlapping portion 93 with the antenna 14 (see also FIG. 2). The overlapping portion 93 of the solar cell 9 with the antenna 14 is formed along the axial direction X at a position facing the short-circuit portion 14c of the radiation electrode 14b of the antenna 14 and the end on the power supply portion 14d side. That is, the overlapping portion 93 of the solar cell 9 with the antenna 14 is formed at a position facing the end of the radiation electrode 14b on the connection portion 14h side along the axial direction X. In other words, the overlapping portion 93 is located at such a position that the short-circuit portion 14 c of the antenna 14 having a relatively small effect on the antenna sensitivity and the end of the power generation main body 91 on the side of the cutout portion 92 overlap the end on the side of the power supply portion 14 d. It is formed by being related. In other words, the overlapping portion 93 is formed by a radially inner end of the antenna 14 in the radial direction Y and a radially inner end of the notch 92 in the solar cell 9 (a portion of a side 92a described later). Then, the cutout portion 92 itself forms a non-overlapping portion 94 that does not overlap with the antenna 14 in the power generation main body portion 91 when viewed in the axial direction (see also FIG. 2).

  In the cutout portion 92 of the present embodiment, a side 92a along the circumferential direction Z centered on the clock center axis X1 is formed in an arc shape centered on the clock center axis X1. The side 92a forms a side inside the notch 92 in the radial direction Y. The notch 92 forms a part of a circle whose side 92a is centered on the clock center axis X1. In addition, the side 92a forms a part of a concentric circle such as the dial 4 formed in a substantially disc shape with the center axis X1 of the clock as a center. Here, the side 92a is formed as a side located in the display area 43 (see FIG. 1) on the dial 4. The display area 43 on the dial 4 is an area exposed on the inner diameter side of the dial ring 5 on the dial 4 and is an area that is visible from the front side in the axial direction X.

  On the other hand, the cutout portion 92 has a side facing the side 92a along the radial direction Y, that is, the outside in the radial direction Y is open along the radial direction Y, and no side is formed. In the solar cell 9, an open portion of the cutout portion 92 forms an insulation cutting region 95. That is, the solar cell 9 of the present embodiment includes the insulating cutting region 95 extending from the notch 92 to the side opposite to the clock center axis X1 side, that is, to the outside in the radial direction Y and penetrating the power generation main body 91. It is configured to have.

  Further, here, the cutout portion 92 is formed such that a side 92b along a direction intersecting the surrounding direction Z is substantially parallel to the radiation side 14f of the antenna 14. The sides 92b are formed as a pair, one at each end in the direction Z around the side 92a. The pair of sides 92b oppose each other in the circumferential direction Z. Each side 92b intersects with each end in the direction Z around the side 92a, and extends outward in the radial direction Y from each end of the side 92a. Each of these sides 92b is also formed as a side located in the display area 43 (see FIG. 1) on the dial 4 similarly to the side 92a.

  In addition, the solar cell 9 is also provided with a date window 96 in the power generation main body 91. The date window 96 is an opening for allowing a part of the character on the date indicator 12 to be visible similarly to the date window 42 of the dial 4 described above, and faces the date window 42 along the axial direction X. Formed at the position where

  The radio timepiece 1 described above can receive radio waves from the outside by the antenna 14 provided on the back side of the dial 4 inside the outer case 2. In addition, the radio-controlled timepiece 1 can generate electric power by converting light energy into electric energy by a solar cell 9 provided between the dial 4 and the antenna 14 inside the outer case 2. In this configuration, the radio-controlled timepiece 1 is provided with a notch 92 at a position facing the antenna 14 along the axial direction X in the solar cell 9. With this configuration, the radio-controlled timepiece 1 appropriately receives an external radio wave via the cutout portion 92 without the antenna 14 being blocked by the power generation main body portion 91 of the solar cell 9 formed of a conductive material. And good antenna sensitivity (reception sensitivity) can be secured. In addition, in the radio-controlled timepiece 1, the side 92 a along the circumferential direction Z centered on the clock center axis X <b> 1 in the notch portion 92 is formed in an arc shape centered on the clock center axis X <b> 1. With this configuration, when viewed from the dial 4 side, the radio-controlled timepiece 1 can make the side 92 a constituting the boundary of the cutout portion 92 in the solar cell 9 less noticeable, so that good aesthetics are secured. can do. As a result, the radio-controlled timepiece 1 can ensure both good antenna sensitivity and good aesthetics.

  For example, in the radio-controlled timepiece 1, the side 92a can be made more inconspicuous by making the basis pattern and other designs of the dial 4 a design with a motif of a concentric circle centered on the clock center axis X1. Thus, the radio-controlled timepiece 1 can more preferably achieve both good antenna sensitivity and good aesthetics.

  Further, in the radio-controlled timepiece 1, since the side 92 a of the notch 92 is formed in an arc shape, for example, the power generation main body of the solar cell 9 is compared with a case where the side 92 a is formed in a straight line. It is also possible to ensure a relatively large power generation area (light receiving area) by 91. As a result, the radio-controlled timepiece 1 can ensure good antenna sensitivity, good aesthetics, and good power generation performance in a well-balanced manner.

  Further, in the radio-controlled timepiece 1 described above, the notch 92 of the solar cell 9 is located along the axial direction X so as to face the radiation electrode 14 b of the antenna 14, and the notch 92 on the side of the notch 92 of the power generation main body 91. An end is located along the axial direction X so as to face the power supply unit 14d and the like. With this configuration, the radio-controlled timepiece 1 has the notch 92 positioned opposite to the radiation electrode 14b, which has a relatively large effect on the antenna sensitivity in the antenna 14, and has a relatively small effect on the antenna 14 in the antenna 14. A configuration in which the power generation main body portion 91 of the solar cell 9 is allowed to overlap a small portion in the axial direction X can be provided. As a result, the radio-controlled timepiece 1 can secure a good antenna sensitivity of the antenna 14, suppress an increase in size, and secure a power generation area of the power generation main body 91 of the solar cell 9 as large as possible. Therefore, the radio-controlled timepiece 1 can secure good antenna sensitivity, and can further secure good power generation performance while suppressing an increase in size.

  Further, in the radio-controlled timepiece 1 described above, the solar cell 9 has the insulating cut area 95. With this configuration, the radio-controlled timepiece 1 can prevent the cutout portion 92 of the solar cell 9 from forming a closed loop, so that a decrease in antenna sensitivity due to the antenna 14 can be suppressed. As a result, the radio-controlled timepiece 1 can ensure better antenna sensitivity.

  Here, in the radio-controlled timepiece 1 described above, the antenna 14 constituting the planar monopole antenna can secure good antenna sensitivity as described above.

[Embodiment 2]
The radio timepiece according to the second embodiment differs from the first embodiment in the shape of the notch. In the following, the same components as those in the above-described embodiment are denoted by the same reference numerals, and the duplicate description of the common configuration, operation, and effect is omitted as much as possible (hereinafter, the same).

  The radio timepiece 1 according to the present embodiment shown in FIG. 5 differs from the radio timepiece 1 in that a movement MM2 is provided instead of the movement MM1. The movement MM2 is different from the above-described movement MM1 in that a solar cell 209 is provided instead of the solar cell 9. Other configurations of the movement MM2 are substantially the same as those of the movement MM1. The solar cell 209 of the present embodiment is different from the above-described solar cell 9 in that a notch 292 is provided instead of the notch 92. Other configurations of the solar cell 209 are substantially the same as those of the solar cell 9.

  The cutout portion 292 of the present embodiment is different from the cutout portion 92 in the shape of the side 292b. The other configuration of the notch 292 is substantially the same as the configuration of the notch 92. The notch 292 is formed so that at least a part of a side 292b along a direction intersecting with the surrounding direction Z is along a radial direction Y orthogonal to the clock center axis X1. Here, the notch 292 has the entire side 292b formed in the radial direction Y. The sides 292b are formed as a pair, one at each end in the direction Z around the side 92a. The pair of sides 292b face each other in the circumferential direction Z. Each side 292b intersects with each end in the direction Z around the side 92a, and extends outward in the radial direction Y from each end of the side 92a. Each side 292b is formed substantially radially along the radial direction Y about the clock center axis X1. As a result, the cutout portion 292 of the present embodiment is formed in a fan band shape such that the width along the circumferential direction Z increases as going outward in the radial direction Y from the clock center axis X1 as a whole. Each of these sides 292b is also formed as a side located in the display area 43 (see FIG. 1) on the dial 4 similarly to the side 92a.

  In this case, the notch 292 is formed such that each of the sides 292b formed along the radial direction Y faces the index 41 of the dial 4 (shown also by a dashed line in FIG. 5) along the axial direction X. It is preferably located. Here, the index 41 is provided along the radial direction Y on the front surface of the dial 4 in the axial direction X as described above. Each side 292b is preferably formed at a position overlapping with any of the indexes 41 when viewed in the axial direction. For example, it is assumed that the indexes 41 are provided at regular intervals of 30 ° around the clock center axis X1 with reference to a line L1 connecting the 10.5 o'clock position on the dial 4 and the clock center axis X1. I do. In this case, it is preferable that each side 292b is formed so as to be located on a radiation having an angle of 30 ° × N (N = natural number) with respect to the line L1 about the clock center axis X1.

  The radio timepiece 1 of the present embodiment described above can achieve both good antenna sensitivity and good aesthetics, similarly to the radio timepiece 1 in the first embodiment.

  Further, in the radio-controlled timepiece 1 of the present embodiment described above, the side 292b forming the cutout portion 292 is formed along the radial direction Y, and is formed substantially radially about the clock center axis X1. With this configuration, when viewed from the dial 4 side, the radio-controlled timepiece 1 of the present embodiment can make each side 292b of the solar cell 9 that defines the boundary of the cutout portion 292 less noticeable. Better aesthetics can be secured. Further, with this configuration, the radio-controlled timepiece 1 of the present embodiment can be positioned with each side 292b further away from the radiation side 14f of the antenna 14 as compared with the above-described side 92b, for example. Good antenna sensitivity can be ensured. As a result, the radio-controlled timepiece 1 of the present embodiment can more preferably achieve both good antenna sensitivity and good aesthetics.

  Further, in the radio-controlled timepiece 1 of the present embodiment described above, it is preferable that each side 292b of the cutout portion 292 is located facing the index 41 of the dial 4 along the axial direction X. In this case, the radio-controlled timepiece 1 of the present embodiment can position each side 292b so as to overlap the index 41 when viewed in the axial direction, so that when viewed from the dial 4 side, each side 292b is further moved. It can be made inconspicuous, and good aesthetics can be secured. Also in this regard, the radio-controlled timepiece 1 of the present embodiment can more preferably achieve both good antenna sensitivity and good aesthetics.

  Here, the radio timepiece 1 of the present embodiment configured as described above has a configuration in which a part of the front side anti-magnetic plate 15 projects toward the notch 292 as shown by a two-dot chain line in FIG. May be configured. Here, as described above, the front-side anti-magnetic plate 15 is on the opposite side to the dial 4 side from the electrode arrangement surface 14 e of the antenna 14 with respect to the axial direction X, that is, on the rear side, and It is a magnetic-resistant plate located within the range (see FIG. 2). In this case, the radio-controlled timepiece 1 of the present embodiment has the front-side anti-magnetic plate 15 arranged in the above-described positional relationship with respect to the antenna 14 even if a part of the front-side anti-magnetic plate 15 protrudes toward the notch 292 side. By doing so, it is possible to prevent the front-side anti-magnetic plate 15 from hindering reception of radio waves by the antenna 14. As a result, the radio-controlled timepiece 1 of the present embodiment can maintain a good antenna sensitivity while suppressing an increase in size, and can secure an appropriate anti-magnetic performance.

  In the above description, it has been described that the notch 292 is preferably positioned so that each side 292b faces the index 41 of the dial 4 along the axial direction X. It does not have to be.

  In the above description, the cutout portion 292 is described as being formed so that the entire side 292b is formed along the radial direction Y, but the present invention is not limited to this.

[Modification of Second Embodiment]
In the solar cell 209A of the movement MM2A according to the modification of the second embodiment shown in FIG. 6, the shape of the notch 292A is different from the shape of the notch 292 described above. The notch 292A differs from the shape of the notch 292 in that only a part of the side 292bA along the direction intersecting the circumferential direction Z is formed along the radial direction Y. As for each side 292bA of the present modification, a portion 292ba on the clock center axis X1 side, that is, the inside 292ba in the radial direction Y is formed along the radial direction Y. On the other hand, each side 292bA is formed so that the side opposite to the clock center axis X1 side, that is, the outer portion 292bb in the radial direction Y is substantially parallel to the radiation side 14f of the antenna 14.

  Even in this case, the radio-controlled timepiece 1 of the present modified example can ensure both good antenna sensitivity and good aesthetics.

  Here, in the radio-controlled timepiece 1 of the present modification, the portion 292ba is formed substantially radially around the clock center axis X1 on each side 292bA constituting the boundary of the cutout portion 292, so that the portion 292ba is formed. It can be less noticeable. On the other hand, the radio-controlled timepiece 1 of the present modified example is configured such that the portion 292bb on each side 292bA constituting the boundary of the notch 292 is substantially parallel to the radiation side 14f of the antenna 14, so that A larger power generation area can be ensured by the power supply 91. As a result, the radio controlled timepiece 1 of the present modified example can achieve a good balance between ensuring good aesthetics and ensuring good power generation performance.

[Embodiment 3]
The radio timepiece according to the third embodiment differs from the first and second embodiments in the shape of the notch.

  The radio-controlled timepiece 1 according to the present embodiment shown in FIG. 7 is different from the above-described radio-controlled timepiece 1 in that a movement MM3 is provided instead of the movement MM2. The movement MM3 is different from the above-described movement MM2 in that a solar cell 309 is provided instead of the solar cell 209. Other configurations of the movement MM3 are substantially the same as those of the movement MM2. The solar cell 309 of the present embodiment is different from the above-described solar cell 209 in that a notch 392 is provided instead of the notch 292. Other configurations of the solar cell 309 are substantially the same as those of the solar cell 209.

  The notch 392 of the present embodiment is different from the above-described notch 292 in the shape of the side facing the side 92a in the radial direction Y, that is, the outer portion in the radial direction Y. The other configuration of the notch 392 is substantially the same as the configuration of the notch 292.

  The cutout portion 392 of the present embodiment has only a part thereof open along the radial direction Y on the side facing the side 92a along the radial direction Y, that is, outside the radial direction Y, and the remaining portion. Is formed with a side 392c. In addition, in the cutout portion 392 of the present embodiment, in addition to the side 92a, the side 392c along the circumferential direction Z is also formed in an arc shape centered on the clock center axis X1. The side 392c constitutes a side of the notch 392 outside in the radial direction Y.

  The notch 392 forms a part of a circle whose side 392c is centered on the clock center axis X1. In addition, the side 392c forms a part of a concentric circle of the side 92a formed in an arc shape centered on the clock center axis X1. Here, the side 392c is formed as a side located in the display area 43 (see FIG. 1) on the dial 4 similarly to the side 92a.

  The part of the solar cell 309 opened along the radial direction Y outside the radial direction Y of the cutout portion 392 forms an insulation cutting region 395. That is, the solar cell 309 of the present embodiment includes the insulating cutting region 395 extending from the notch 392 to the opposite side to the clock center axis X1 side, that is, to the outside in the radial direction Y and penetrating the power generation main body 91. It is configured to have. The insulation cutting region 395 is formed so as to divide the side 392c into two. The power generation main body portion 91 of the present embodiment includes a pair of arc-shaped extending portions 391a that protrude inward in the notch portion 392 along the circumferential direction Z outside the radial direction Y of the notch portion 392. Having. The pair of arc-shaped extending portions 391a are formed to protrude in an arc shape along the circumferential direction Z around the clock center axis X1. Further, the pair of arc-shaped extending portions 391a are formed so as to face each other in the circumferential direction Z and approach each other. The above-mentioned two sides 392c each constitute an inner side in the radial direction Y of the pair of arc-shaped extending portions 391a. In the solar cell 309, an insulation cutting region 395 is formed between the pair of arc-shaped extending portions 391a in the circumferential direction Z. Here, the insulation cutting area 395 is formed at a position corresponding to the 10.5 o'clock position on the dial 4. Even in this case, in the solar cell 309, the cutout portion 392 is located to face the radiation electrode 14b of the antenna 14 along the axial direction X, and each arc-shaped extending portion 391a is viewed in the axial direction. Are formed so as not to overlap the radiation sides 14f, 14g, etc. of the radiation electrode 14b.

  In the radio-controlled timepiece 1 of the present embodiment described above, in addition to the side 92a along the circumferential direction Z centered on the clock center axis X1 in the notch 392, the side 392c is also centered on the clock center axis X1. It is formed in an arc shape. With this configuration, in the radio-controlled timepiece 1 of the present embodiment, when viewed from the dial 4 side, in addition to the side 92a forming the boundary of the cutout 392, the side 392c can be made inconspicuous. Good aesthetics can be secured. As a result, the radio-controlled timepiece 1 of this embodiment can achieve both good antenna sensitivity and good aesthetics, as in the radio-controlled timepieces 1 of the other embodiments described above.

  Further, in the radio-controlled timepiece 1 of the present embodiment described above, the solar cell 309 has the insulation cut area 395. With this configuration, the radio-controlled timepiece 1 of the present embodiment can prevent the cutout portion 392 of the solar cell 309 from forming a closed loop, similarly to the radio-controlled timepiece 1 and the like, so that the reception sensitivity of the antenna 14 can be reduced. Can be suppressed. In addition, in the radio-controlled timepiece 1 of the present embodiment, the insulation cutting area 95 is formed only in a part of the notch 392, and the power generation main body 91 extends in an arc shape outside the notch 392 in the radial direction Y. It is configured to have a portion 391a. As a result, the radio-controlled timepiece 1 of the present embodiment can secure a wider power generation area by the power generation main body 91, so that it is possible to achieve both good aesthetics and good power generation performance in a well-balanced manner. Can be.

  In the above description, the solar cell 309 has been described on the assumption that both the side 92a and the side 392c are formed in an arc shape centered on the clock center axis X1 in the notch 392, but the present invention is not limited to this. .

[Modification 1 of Embodiment 3]
In the solar cell 309A of the movement MM3A according to the first modification of the third embodiment shown in FIG. 8, the shape of the notch 392A is different from the shape of the notch 392 described above. Here, the notch 392A includes a side 392c formed in an arc shape centered on the clock center axis X1, but does not include the side 92a, and as a whole, goes outward in the radial direction Y from the clock center axis X1. Is formed in a fan shape such that the width along the circumferential direction Z increases in accordance with. Here, the solar cell 309A does not form the overlapping portion 93 with the antenna 14.

  Even in this case, the radio-controlled timepiece 1 of the present modified example can ensure both good antenna sensitivity and good aesthetics. In this case, in the radio-controlled timepiece 1 of this modification, the overlapping portion is formed between the dielectric 14a of the antenna 14 and the solar cell 309A, but the overlapping portion is formed between the radiation electrode 14b and the solar cell 309A. Is not formed, it is possible to more reliably ensure good antenna sensitivity.

  In the above description, the insulating cutting area 395 has been described as being formed at a position corresponding to the 10.5 o'clock position on the dial 4, but the present invention is not limited to this. Further, for example, the arc-shaped extending portions 391a described above need not be provided as a pair.

[Modification 2 of Embodiment 3]
The solar cell 309B of the movement MM3B according to the second modification of the third embodiment shown in FIG. 9 has one arc-shaped extending portion 391a provided in the power generation main body 91, and the insulating cut region 395B is provided in the notch 392B. It is formed relatively wide. In the first modification shown in FIG. 8, the side 392c formed in an arc shape centered on the clock center axis X1 is provided in each of the pair of arc-shaped extending portions 391a. Since the arc-shaped extending portion 391a is located at one location, there is also only one location at the side 392c formed in an arc shape centered on the clock center axis X1. In this case, for example, when the antenna 14 is arranged at the 10.5 o'clock position on the dial 4, the direction of the 9 o'clock position on the dial 4 is likely to be directed to the zenith when the watch is mounted, in the radio-controlled timepiece 1 of the present modified example. Because of this tendency, it is preferable that the insulation cutting region 395B be formed such that the insulation cutting region 395B faces the 9 o'clock position with respect to the 10.5 o'clock position. With such a configuration, the radio-controlled timepiece 1 of the present modified example may be able to further improve the reception sensitivity of the antenna 14. Note that the antenna 14 tends to be disposed between the 6 o'clock position, the 9 o'clock position, and the 12 o'clock position outside the region where the crown 71 on the 3 o'clock position is provided. It is preferable that the insulation cutting region 395B is configured to face the 9 o'clock position as much as possible while taking the arrangement position of 14 into consideration.

  The radio timepiece according to the above-described embodiment of the present invention is not limited to the above-described embodiment, and can be variously modified within the scope described in the claims. The radio-controlled timepiece according to the present embodiment may be configured by appropriately combining the components of the above-described embodiments and modified examples.

  In the above description, the antenna 14 has been described as constituting a planar monopole antenna, but is not limited thereto. Various shapes other than those exemplified as the shape of the planar monopole antenna can be adopted for the antenna 14. In the above description, the power supply unit 14d has been described as constituting a direct power supply unit that supplies power to the radiation electrode 14b by direct power supply, but is not limited thereto. For example, the antenna 14 may constitute a so-called electromagnetic coupling type planar monopole antenna. In this case, the power supply unit 14d forms an electromagnetic power supply unit that supplies power to the radiation electrode 14b by electromagnetic coupling. That is, in the antenna 14, the power supply unit 14d and the radiation electrode 14b are not physically in contact with each other, but are separated from each other. Power supply is provided.

  In the above description, the power supply unit 14d is described as being provided on the side surface 14i where the short-circuit unit 14c is provided in the dielectric 14a, but is not limited thereto. The power supply portion 14d may be provided on a surface different from the side surface 14i on which the short-circuit portions 14c are provided. For example, the power supply portion 14d may be provided on a surface opposed to the side surface 14i of the dielectric material 14a, that is, on a side surface outside in the radial direction Y. It may be provided. Further, the arrangement relationship between the short-circuit portion 14c and the power supply portion 14d may be reversed. In the above description, the dielectric 14a has been described as being formed in a substantially rectangular parallelepiped shape, but is not limited to this. The radiation electrode 14b described above may extend to a surface of the dielectric 14a other than the electrode arrangement surface 14e.

  Further, the antenna 14 may be a so-called patch antenna, inverted F-type antenna, or coil antenna. For example, the antenna 214B of the movement MM2B according to the modified example of the antenna shown in FIG. 10 differs from the above-described antenna 14 in that it constitutes a so-called patch antenna (planar antenna). The antenna 214B has a dielectric 214aB and a radiation electrode 214bB. The dielectric 214aB is formed in a substantially square plate shape. The radiation electrode 214bB is formed in a substantially square plate shape, and is provided on an electrode arrangement surface 214eB which is a front surface (front surface) in the axial direction X of the dielectric 214aB. The radiation electrode 214bB is supplied with power via a power supply section 214dB located inside the radial direction Y. Also in this case, the solar cell 209 has an end on the cutout 92 side of the power generation main body 91 (an end forming the side 92 a) facing the feeder 214 dB of the antenna 214 </ b> B along the axial direction X. Thus, an overlapping portion 93 with the antenna 214B is formed. Even in this case, the radio-controlled timepiece 1 of the present modification can achieve both good antenna sensitivity and good aesthetics as described above in the antenna 214B constituting the patch antenna.

  In the above description, the reception target of the antennas 14 and 214B has been described as being a GPS radio wave, but the present invention is not limited to this. The reception target of the antennas 14 and 214B may be a radio wave output from a satellite other than a GPS satellite, or may be a radio wave using Bluetooth (registered trademark), Wi-Fi (registered trademark), or NFC. . Further, the reception target of the antennas 14 and 214B may be a radio wave output from a terrestrial base station or the like.

  In the above description, the date dial 12 is described as being arranged such that the date dial rotation axis X5 parallel to the clock center axis X1 is the center of rotation, but the present invention is not limited to this. The date wheel rotation axis may be the same as the clock center axis X1. Further, the antenna 14 and a part of the date wheel 12 may be arranged so as to overlap with each other when viewed in the axial direction.

  In the above description, the main body portion 21 of the outer case 2 has been described as being formed in a substantially cylindrical shape centered on the clock center axis X1, but the present invention is not limited to this. The main body 21 may have, for example, a substantially rectangular tubular shape, a substantially barrel-shaped tubular shape, or the like. In this case, the clock center axis X1 is set as an axis passing through the geometric center of gravity of the movements MM1, MM2, MM2A, MM2B, MM3, MM3A, MM3B and the outer case 2 as viewed in the axial direction as described above. Is done.

  In the above description, the solar cells 9, 209, 209A, 309, 309A, and 309B have been described as being configured to have the insulation cutting regions 95, 395, and 395B. A configuration without 395 and 395B may be used. Further, the radio-controlled timepiece 1 may be configured not to include the overlapping portion 93.

  In the above description, the radio-controlled timepiece 1 has been described as an analog electronic timepiece that displays time using the physical hands 6, but is not limited to this. The radio timepiece 1 may be, for example, a digital electronic timepiece that displays time on a liquid crystal display unit or the like. Further, the radio-controlled timepiece 1 has been described as a wristwatch worn on the wrist via the belt 25, but is not limited to this. The radio clock 1 may be, for example, a table clock, a wall clock, a pocket watch, or the like. Further, the radio-controlled timepiece 1 is applied to, for example, various types of cameras, game machines, mobile phones, PDAs (Personal Digital Assistants), portable information terminal devices such as notebook personal computers, and electronic devices including home appliances and automobiles. May be used.

REFERENCE SIGNS LIST 1 radio timepiece 2 outer case 4 dial 9, 209, 209 A, 309, 309 A, 309 B solar cell 14, 214 B antenna 14 b, 214 bB radiating electrodes 14 d, 214 dB power supply unit 15 front side anti-magnetic plate (anti-magnetic plate)
16 Backside magnetic-resistant plate 41 Indexes 92, 292, 292A, 392, 392A, 392B Cutouts 92a, 92b, 292b, 292bA, 392c Sides 95, 395, 395B Insulated cutting areas MM1, MM2, MM2A, MM2B, MM3, MM3A , MM3B Movement W Width direction X Axis direction Y Radial direction Z Surrounding direction X1 Clock center axis X2 Main needle rotation axis X3 Secondary needle rotation axis

Claims (7)

An outer case,
A dial provided inside the outer case,
An antenna provided on the back side of the dial with respect to an axial direction along a clock center axis of the outer case;
A solar cell provided between the dial and the antenna in the axial direction,
The solar cell is located opposite to the antenna along the axial direction, and a side along a peripheral direction around the clock central axis is formed in a circular arc shape around the clock central axis. Characterized by having a notch,
Radio clock. The notch, at least a part of a side along a direction intersecting with the circumferential direction is formed along a radial direction orthogonal to the clock center axis,
The radio-controlled timepiece according to claim 1. The dial includes an index provided along the radial direction and representing time.
The notch, the side formed along the radial direction is located facing the index along the axial direction,
The radio timepiece according to claim 2. The antenna includes a radiation electrode that receives a radio wave, and a power supply unit that supplies power to the radiation electrode,
In the solar cell, the cutout portion is located facing the radiation electrode along the axial direction, and the cutout portion side end is located facing the power supply portion along the axial direction. ,
The radio timepiece according to any one of claims 1 to 3. The solar cell has an insulating cutting region extending from the cutout portion to a side opposite to the clock center axis side and penetrating therethrough.
The radio-controlled timepiece according to claim 1. A magnetic field-resistant plate provided inside the outer case and located in the range of the antenna with respect to the axial direction and shielding an external magnetic field,
When viewed along the axial direction, the anti-magnetic plate partially projects toward the notch.
A radio-controlled timepiece according to any one of claims 1 to 5. The antenna is a planar monopole antenna,
A radio-controlled timepiece according to any one of claims 1 to 6.

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