JP6829136B2 - Radio clock - Google Patents

Description

The present invention relates to a radio clock that receives a signal from a satellite or the like.

A portable radio-controlled clock that receives time information included in a transmission signal from a satellite or the like constituting a GPS (Global Positioning System) and corrects the time has been put into practical use. The type and arrangement of the antennas for receiving radio waves are determined so as to obtain the required reception sensitivity without impairing the function of the clock.

Patent Document 1 discloses that an antenna is formed on the inner surface of the outer peripheral portion of the window material, and the antenna and the circuit board in the movement are made conductive via conductive pins.

Japanese Unexamined Patent Publication No. 2003-315475

The inventors of the present application are studying arranging an antenna electrode along the outer circumference of a portable watch such as a wristwatch, and connecting a substrate on which a receiving circuit is arranged and an antenna electrode with a conductive pin. On the other hand, the wiring that electrically connects the antenna electrode and the receiving circuit is easily affected by surrounding metal members and noise, and the receiving sensitivity tends to decrease. For example, if the bezel is made of metal, the reception sensitivity is greatly reduced.

The present invention has been made in consideration of the above circumstances, and an object of the present invention is to provide a highly sensitive radio-controlled clock.

(1) A windshield, a metal outer case including a back cover, an antenna arranged on the back side of the windshield, a dial arranged in the outer case, and one end of the antenna in contact with the antenna. A radio-controlled clock including a conductive pin constituting a circuit for connecting the antenna and a receiving circuit, and a high-dielectric member that covers the outside of the conductive pin and is arranged inside the outer case.

(2) In (1), the cover member further includes a cover member arranged between the windshield and the dial, the cover member is provided with a notch or an opening through which the conductive pin is inserted, and the high-dielectric member is said. A radio clock placed in a notch or the opening.

(3) In (1) or (2), the high-dielectric member is a radio-controlled clock that surrounds the conductive pin in a plan view.

(4) In (1), the radio-controlled timepiece is a cover member arranged between the windshield and the dial and adjacent to the inner peripheral surface of the exterior case.

(5) In any of (1) to (4), the cover member has a projecting portion adjacent to the conductive pin and projecting in a direction away from the windshield, and the projecting portion is the highly dielectric member. A radio-controlled clock with a notch in which it is placed.

(6) In any of (1) to (5), the balun circuit arranged between the antenna and the back cover is further included, and the conductive pin electrically connects the antenna and the balun circuit. A radio-controlled timepiece in which the high-dielectric member covers the outside of the balun circuit and is arranged inside the outer case.

(7) In (6), the high-dielectric member is further arranged between the balun circuit and the back cover, a radio-controlled timepiece.

(8) In (6) or (7), the high-dielectric member has an opening through which the conductive pin is inserted and covers the dial side of the balun circuit.

(9) In any of (1) to (7), a first movement that is arranged between the dial and the back cover, further includes a movement including the receiving circuit, and covers the back cover side of the movement. A radio-controlled timepiece having a second high-dielectric member including a portion of the movement and a second portion covering the outer peripheral side of the movement.

(10) In (9), the second portion of the second high-dielectric member is a radio-controlled timepiece made of resin.

(11) In (9) or (10), the second high-dielectric member is a radio-controlled clock having an opening or a notch.

(12) The radio-controlled timepiece according to (11), further including an operating member inserted into an opening or a notch included in the second high-dielectric member.

(13) In (11), a radio-controlled clock further comprising a ground wire inserted through an opening or a notch included in the second high-dielectric member.

According to the present invention, it is possible to provide a radio clock having high reception sensitivity.

It is a top view which shows an example of the satellite radio-controlled wristwatch which concerns on 1st Embodiment. It is sectional drawing in the II-II cutting line of the satellite radio-controlled wristwatch shown in FIG. It is a partial plan view which shows an example of arrangement of a conductive pin and a high dielectric member. It is a top view which shows an example of the balun substrate connected to a conductive pin. It is a block diagram which shows an example of the structure of an antenna, a balun circuit, and a receiving circuit. It is a partial plan view which shows another example of arrangement of a conductive pin and a high dielectric member. It is a partial plan view which shows another example of arrangement of a conductive pin and a high dielectric member. It is a partial plan view which shows another example of arrangement of a conductive pin and a high dielectric member. It is a partial plan view which shows another example of arrangement of a conductive pin and a high dielectric member. It is a partial plan view which shows another example of arrangement of a conductive pin and a return ring. It is a partial plan view which shows another example of arrangement of a conductive pin and a return ring. It is sectional drawing which shows another example of the satellite radio-controlled wristwatch. It is sectional drawing which shows another example of the satellite radio-controlled wristwatch. It is sectional drawing which shows another example of the satellite radio-controlled wristwatch. It is a top view which shows the arrangement of the conductive pin and the high dielectric member of the satellite radio-controlled wristwatch shown in FIG. It is sectional drawing which shows an example of the satellite radio-controlled wristwatch which concerns on 2nd Embodiment. It is a partial cross-sectional view which shows another example of the high dielectric member covering a balun substrate. It is a partial cross-sectional view which shows another example of the high dielectric member covering a balun substrate. It is sectional drawing which shows the other example of the satellite radio-controlled wristwatch schematically. It is a top view which shows an example of arrangement of a conductive pin and a high dielectric member. It is a top view which shows an example of arrangement of a back cover and a high dielectric member.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. Hereinafter, the satellite radio-controlled wristwatch 1 according to the embodiment of the present invention will be described. The satellite radio-controlled wristwatch 1 according to the present embodiment receives a satellite radio wave including time information, and corrects or positions the time measured by itself using the time information included in the received satellite radio wave.

[First Embodiment]
FIG. 1 is a plan view showing an example of the appearance of the satellite radio-controlled wristwatch 1 according to the first embodiment, and FIG. 2 is a sectional view taken along line II-II of the satellite radio-controlled wristwatch 1 shown in FIG. .. As shown in these figures, the satellite radio-controlled wristwatch 1 includes a windshield 31, a bezel 32 for holding the windshield 31, a cylindrical body 38, and a back cover 39 (not shown) provided under the body 38. including. These constitute the outer shape of the satellite radio-controlled wristwatch 1. The body 38 and the bezel 32 are sandwiched between the windshield 31 and the back cover 39. The body 38, the bezel 32, and the back cover 39 form the outer case of the satellite radio-controlled wristwatch 1. In the following, the direction from the center of the satellite radio-controlled wristwatch 1 toward the windshield 31 is referred to as upward, and the direction toward the back cover 39 is referred to as downward.

The body 38 is made of metal and has holes that are penetrated in the vertical direction. The bezel 32 is a ring-shaped member corresponding to the shape of the upper part of the hole of the body 38. The bezel 32 is made of metal. The bezel 32 is connected to the body 38 by being fitted into the upper part of the hole of the body 38. The back cover 39 is made of metal and has a flat surface corresponding to the shape of the lower part of the hole of the body 38, and the back cover 39 is fitted in the lower part of the hole. The windshield 31 has a planar shape corresponding to the shape of the upper part of the opening of the bezel 32, and is fitted into the opening of the bezel 32. The windshield 31 and the bezel 32 are in contact with each other via a packing (not shown), and the windshield 31 is fixed by the packing. Further, the bezel 32 and the body 38 are in contact with each other via a packing (not shown), and the bezel 32 is fixed by the packing. Further, although the impact resistance and the waterproof property are inferior, the windshield 31 may be fixed to the bezel 32 by caulking or adhesive instead of packing.

Further, the satellite radio-controlled wristwatch 1 includes a blindfold area 61, antennas 10a and 10b, a ring-shaped counter ring 34, high dielectric members 36a and 36b, a dial 51, an hour hand 52a, a minute hand 52b and a second hand 52c, a balun circuit 21, and not shown. Includes solar cell, movement 59. These are arranged in a space surrounded by a windshield 31, a bezel 32, a body 38, and a back cover 39. The movement 59 is arranged in an outer case, and includes a date plate, a main plate, a balun board 43, a circuit module 47, a drive circuit, and the like.

The antennas 10a and 10b are arranged on the lower side (back side) of the windshield 31 so as to extend along the peripheral edge of the windshield 31. In the example of FIG. 1, each of the antennas 10a and 10b has an arc shape. The antennas 10a and 10b receive satellite signals transmitted from the satellite. In particular, in the present embodiment, the antennas 10a and 10b are so-called dipole antennas, and receive radio waves having a frequency of about 1.6 GHz transmitted from a GPS (Global Positioning System) satellite. GPS is a kind of satellite positioning system, and is realized by a plurality of GPS satellites orbiting the earth. Further, the antennas 10a and 10b may receive radio waves transmitted from the satellites constituting the quasi-zenith satellite system or GLONASS, or may transmit and receive radio waves of about 2.4 GHz in accordance with the Bluetooth (registered trademark) standard and the like. Good.

A ring-shaped blindfold region 61 is provided between the antennas 10a and 10b and the windshield 31 in a plan view. Antennas 10a and 10b are adhered or vapor-deposited on the lower surface of the blindfold region 61. The blindfold area 61 is formed by, for example, printing, and the blindfold area 61 prevents the antennas 10a and 10b from being visually recognized from the front side. The blindfold region 61 may not be provided, and the antennas 10a and 10b may be directly adhered or vapor-deposited to the windshield 31.

The return ring 34 is a ring-shaped member between the movement 59 and the windshield 31, and is provided along the inner peripheral surface of the bezel 32 or the body 38. The material of the return ring 34 is, for example, resin or ceramics. The return ring 34 includes an outer peripheral surface, an upper surface from the upper end of the outer peripheral surface to the inner peripheral side, an inclined surface from the inner peripheral end of the upper surface toward the dial 51, an inner peripheral surface connected to the inclined surface, and an outer peripheral surface. Includes a bottom surface connecting the lower ends of the surface and the inner peripheral surface.

The two conductive pins 41 have a one-to-one correspondence with the antennas 10a and 10b, and each of the antennas 10a and 10b is electrically connected to the balun substrate 43 by the corresponding conductive pins 41. The upper ends of the two conductive pins 41 abut against the antennas 10a and 10b. The conductive pin 41 extends in a direction away from the windshield 31 when viewed from the antennas 10a and 10b. Further, the lower ends of the two conductive pins 41 are in contact with two connection terminals provided on the baran substrate 43, respectively.

The bezel 32 projects from the inner peripheral surface, extends under the dial ring 34, and has an overhanging portion 32e adjacent to the outer peripheral end of the dial 51. In a plan view, the overhanging portion 32e of the bezel 32 is not provided in the region through which the conductive pin 41 and the high-dielectric members 36a and 36b pass.

The overhanging portion 32e may be configured to ride on the dial 51. When the overhanging portion 32e of the bezel 32 rides on the dial 51, the overhanging portion 32e presses the edge of the dial 51 to align the movement 59.

It is desirable that the dielectric constants of the high-dielectric members 36a and 36b are higher than the dielectric constants of the dial ring 34 and the dial 51. The high-dielectric members 36a and 36b are members such as ceramics, and the material of the high-dielectric member 36 may be, for example, alumina, silicon nitride (dielectric constant 8 to 10), or zirconia (dielectric constant 28 to 33). It may be a sintered body mixed with titanium oxide (dielectric constant 60 to 100). The material of the high-dielectric member 36 may be another ceramic material or resin material having a high dielectric constant.

FIG. 3 is a partial plan view showing an example of the arrangement of the conductive pin 41 and the high-dielectric member 36a. A notch 34n is provided on the outer peripheral side of the return ring 34. The notch 34n has a shape in which a part of the outer peripheral surface, the upper surface, and the bottom surface of the return ring 34 is cut off. Two conductive pins 41 extending in the vertical direction and a high-dielectric member 36a are arranged inside the notch 34n. Further, the high-dielectric member 36a is arranged outside the conductive pin 41 and inside the bezel 32. The high-dielectric member 36a and the return ring 34 sandwich the conductive pin 41.

FIG. 4 is a plan view showing an example of the balun substrate 43 connected to the conductive pin 41. The high-dielectric member 36b is provided adjacent to the lower side of the high-dielectric member 36a, is arranged outside the conductive pin 41 and the balun substrate 43, and is arranged inside the inner peripheral surface of the bezel 32 and the body 38. ing. In the examples of FIGS. 2 and 4, the high-dielectric member 36a and the high-dielectric member 36b are different members, but the high-dielectric member 36a and the high-dielectric member 36b may be integrally molded. Further, the high dielectric member 36b does not have to be arranged outside the conductive pin 41.

FIG. 5 is a block diagram showing an example of the configuration of the antennas 10a and 10b, the balun circuit 21, and the receiving circuit 22. The balun circuit 21 is arranged on the balun board 43. The antennas 10a and 10b are electrically connected to the balun circuit 21 via conductive pins 41, respectively. Further, the balun circuit 21 is connected to the receiving circuit 22 via the coaxial pin 45. In addition, instead of the coaxial pin 45, a coaxial line such as a coaxial cable may be used.

The balun circuit 21 converts the balanced reception signals from the antennas 10a and 10b into unbalanced signals. The balun circuit 21 includes a coil 21a on the antenna 10a and 10b sides and a coil 21b on the receiving circuit 22 side. The antenna 10a is electrically connected to one end of the coil 21a, and the antenna 10b is electrically connected to the other end of the coil 21b. One end of the coil 21b is connected to the receiving circuit 22 via a connection wiring, and the other end of the coil 21b is connected to a wiring that supplies the ground potential GND of the circuit. A transformer composed of coils 21a and 21b converts a balanced reception signal into an unbalanced signal. The conductive pin 41, the balun circuit 21, and the coaxial pin 45 form a circuit for connecting the antennas 10a and 10b and the receiving circuit 22.

The receiving circuit 22 decodes the signals received by the antennas 10a and 10b, and outputs a bit string (received data) indicating the contents of the satellite signal obtained as a result of the decoding. More specifically, the receiving circuit 22 includes a high frequency circuit (RF circuit) and a decoding circuit. The high-frequency circuit operates at a high frequency, amplifies and detects analog signals received by the antennas 10a and 10b, and converts them into baseband signals. The decoding circuit decodes the baseband signal output by the high-frequency circuit, generates a bit string indicating the content of the data received from the GPS satellite, and outputs the bit string.

Here, the movement 59 includes a control circuit and a drive mechanism (not shown). The control circuit acquires a bit string acquired from the reception circuit 22 and controls various circuits and drive mechanisms included in the satellite radio-controlled wristwatch 1. The drive mechanism includes a motor which is a step motor and a train wheel. By transmitting the rotation of the motor by the train wheel, for example, one of the hour hand 52a, the minute hand 52b, and the second hand 52c is rotated. This will display the current time.

The high frequency signal received by the antennas 10a and 10b flows through the path between the antennas 10a and 10b and the receiving circuit 22. The high frequency signal flowing through this path is easily affected by surrounding metals and noise. On the other hand, when the high-dielectric members 36a and 36b are arranged between the path of the high-frequency signal and the metal or noise source, the influence of the metal or noise on the high-frequency signal can be reduced and the reception sensitivity is improved. In particular, when the bezel 32 is made of metal, the bezel 32 becomes a metal member closest to the conductive pin 41, and the high-dielectric member 36a is arranged between the bezel 32 and the conductive pin 41 to increase the reception sensitivity. improves.

The arrangement of the conductive pin 41 and the high-dielectric members 36a and 36b is not limited to that shown in FIGS. 2 and 3. FIG. 6 is a partial plan view showing another example of the arrangement of the conductive pin 41 and the high-dielectric member 36a. In the example of FIG. 6, the return ring 34 is provided with an opening 34s penetrating in the vertical direction instead of the notch 34n. The opening 34s penetrates the upper surface and the bottom surface of the return ring 34. The conductive pin 41 and the high-dielectric member 36a are provided so as to pass through the opening 34s. Further, the high-dielectric member 36a is arranged outside the conductive pin 41 and inside the bezel 32.

FIG. 7 is a partial plan view showing another example of the arrangement of the conductive pin 41 and the high-dielectric member 36a. In the example of FIG. 7, a notch 34 m is provided on the inner peripheral side of the return ring 34. The notch 34 m has a shape in which a part of the inner peripheral surface, the inclined surface, the upper surface, and the bottom surface of the return ring 34 is cut off. Two conductive pins 41 extending in the vertical direction and a high-dielectric member 36a are arranged inside the notch 34m. Further, the high-dielectric member 36a is arranged outside the conductive pin 41 and inside the bezel 32, and the return ring 34 and the high-dielectric member 36a are sandwiched between the conductive pin 41 and the inner peripheral surface of the bezel 32. There is.

FIG. 8 is a partial plan view showing another example of the arrangement of the conductive pin 41 and the high-dielectric member 36a. In the example of FIG. 8, unlike the example of FIG. 3, the high-dielectric member 36a is arranged in the notch 34n of the return ring 34. Further, the return ring 34 is provided with openings 34r and 34q penetrating vertically, and the two conductive pins 41 are arranged so as to pass inside the openings 34r and 34q, respectively.

FIG. 9 is a partial plan view showing another example of the arrangement of the conductive pin 41 and the high-dielectric member 36a. In the example of FIG. 9, a notch 34n is provided on the outer peripheral side of the return ring 34, and the high-dielectric member 36a is arranged in the notch 34n. The high-dielectric member 36a is provided with openings 36r and 36q penetrating from top to bottom, and the two conductive pins 41 are arranged so as to pass inside the openings 36r and 36q, respectively.

FIG. 10 is a partial plan view showing another example of the arrangement of the conductive pin 41 and the return ring 34. In the example of FIG. 10, the dielectric constant of the return ring 34 is higher than that of the return ring 34 in the examples of FIGS. 2 and 9. The material of the return ring 34 may be the same as that of the high dielectric member 36a in the example of FIG. In the example of FIG. 10, a notch 34 m is provided on the inner peripheral side of the return ring 34. The notch 34 m has a shape in which a part of the inner peripheral surface, the inclined surface, the upper surface, and the bottom surface of the return ring 34 is cut off. The two conductive pins 41 extending in the vertical direction are arranged inside the notch 34 m.

FIG. 11 is a partial plan view showing another example of the arrangement of the conductive pin 41 and the return ring 34. In the example of FIG. 11, the dielectric constant of the return ring 34 is high, as in the example of FIG. Further, the return ring 34 is provided with an opening 34s penetrating from top to bottom. The ends of the opening 34s reach the upper and lower surfaces of the dial ring 34, and the cross section of the opening 34s is substantially rectangular. The cross section of the opening 34s has, for example, a shape in which adjacent sides of the four sides are connected by a curved line. Inside the opening 34s, two conductive pins 41 extending in the vertical direction are arranged.

Also in the examples of FIGS. 6 to 11, the influence of metal and noise on the high frequency signal is reduced, and the reception sensitivity is improved.

FIG. 12 is a cross-sectional view showing another example of the satellite radio-controlled wristwatch 1. In the example of FIG. 12, the dielectric constant of the return ring 34 is high, as in the example of FIG. Further, the return ring 34 has a protruding portion 34p adjacent to the conductive pin 41 and protruding downward from the lower surface. The bezel 32 has an overhang 32e. It overhangs from the inner peripheral surface, extends under the dial ring 34, and has an overhanging portion 32e adjacent to the outer peripheral end of the dial 51. In a plan view, the overhanging portion 32e of the bezel 32 is not provided in the region overlapping the protruding portion 34p of the return ring 34. The position of the return ring 34 is aligned by engaging the protruding portion 34p and the protruding portion 32e.

FIG. 13 is a cross-sectional view showing another example of the satellite radio-controlled wristwatch 1. In the example of FIG. 13, unlike the example of FIG. 12, a high-dielectric member 36b that covers the lower end of the conductive pin 41, the balun substrate 43, and the outside of the coaxial pin 45 is provided. The protrusion 36p of the return ring 34 is provided with a notch having a shape corresponding to the upper end of the high-dielectric member 36b, and the high-dielectric member 36b is positioned so as not to move laterally due to the notch. Further, by providing the movement 59 and the circuit module 47 with notches corresponding to the high dielectric member 36b, it is possible to accurately align these positions. For example, accurate contact between the conductive pin 41 and the coaxial pin 45 makes it possible to suppress manufacturing variations.

FIG. 14 is a cross-sectional view showing another example of the satellite radio-controlled wristwatch 1. FIG. 15 is a plan view showing the arrangement of the conductive pin 41 and the high-dielectric member 36b of the satellite radio-controlled wristwatch 1 shown in FIG. In the examples of FIGS. 14 and 15, unlike the example of FIG. 13, the balun board 43 is not provided, and the conductive pin 41 is in contact with the connection terminal of the circuit module 47. In the example of FIG. 14, a balun circuit 21 may be provided in the circuit module 47. Further, the balun circuit 21 may not be provided.

In the example of FIG. 14, the high-dielectric member 36b has a ring shape in a plan view and is provided on the outside of the circuit module 47. A portion of the high-dielectric member 36b adjacent to the conductive pin 41 is provided with a protruding portion 36p extending upward from the ring-shaped portion. The protruding portion 36p covers the outside of the conductive pin 41. Similar to the example of FIG. 13, the protruding portion 36p of the return ring 34 is provided with a notch having a shape corresponding to the protruding portion 36p of the high dielectric member 36b, and the high dielectric member 36b moves laterally by the notch. It is positioned so that it is not. Further, the high-dielectric member 36b is provided with an opening 36u, and an operating member 65 is provided from the outside of the outer case through the opening 36u and connected to the circuit module 47. The operating member 65 may be a crown as in the example of FIG. 15, or may be another member such as a button.

[Second Embodiment]
Next, the differences between the second embodiment of the present invention and the first embodiment will be mainly described. In the satellite radio-controlled wristwatch 1 according to the second embodiment, a member having a high dielectric constant is also provided between the balun substrate 43 and the back cover 39 of the outer case.

FIG. 16 is a cross-sectional view showing an example of the satellite radio-controlled wristwatch 1 according to the second embodiment. FIG. 16 is a diagram corresponding to FIG. In the example of FIG. 16, not only the high-dielectric member 36b is arranged on the outer peripheral side of the balun board 43 and the inner peripheral side of the outer case, but also the high-dielectric member covering the upper side of the balun board 43 and the lower side of the balun board 43. 36c is provided. The high-dielectric member 36c also covers the side of the baran substrate 43 opposite to the outer peripheral side (inner in the radial direction). The two conductive pins 41 penetrate the high-dielectric member 36c and are in contact with the antennas 10a and 10b and the balun substrate 43. By covering the lower side of the balun substrate 43 as well, the influence of the metal back cover 39 and the influence of noise from the lower side can be reduced, and the reception sensitivity can be improved.

Here, the member having a high dielectric constant that covers the balun substrate 43 may be divided into a member that covers the upper side and a member that covers the lower side of the balun substrate 43. FIG. 17 is a partial cross-sectional view showing an example of the high dielectric members 36d and 36e covering the balun substrate 43. In FIG. 17, for the sake of explanation, the high-dielectric member 36d, the high-dielectric member 36e, the conductive pin 41, and the coaxial pin 45 are separated from each other, but they are moved in the direction of the arrow in the drawing. The actual shape of the example of FIG. 17 is almost the same as that of the example of FIG. In the example of FIG. 17, a high-dielectric member 36d that covers the upper side and the radial inner side of the balun substrate 43 and a high-dielectric member 36e that covers the lower side and the radial outer side of the balun substrate 43 are arranged. The high-dielectric member 36e is also provided at the location of the high-dielectric member 36b in FIG.

The high-dielectric member 36d and the high-dielectric member 36e are in contact with each other on the radial outer side and below the radial inner side of the baran substrate 43. Further, the high-dielectric member 36e may have a protruding portion 36p. The high-dielectric member 36d is provided with an opening 36s through which the conductive pin 41 penetrates, and the high-dielectric member 36e is provided with an opening 36t through which the coaxial pin 45 penetrates.

FIG. 18 is a partial cross-sectional view showing another example of the high dielectric members 36d and 36e covering the balun substrate 43. In the example of FIG. 18, the high dielectric member 36e covers the underside, radial inside and radial outside of the balun substrate 43. In other words, it has a recess in which the balun substrate 43 is placed. On the other hand, the high-dielectric member 36d is a plate-shaped member that covers the upper side of the balun substrate 43 and is in contact with the upper end of the high-dielectric member 36e. The high-dielectric member 36d is provided with an opening 36s, and the high-dielectric member 36e is provided with an opening 36t. The member having a high dielectric constant that covers the balun substrate 43 may be integrally molded or may be divided into a plurality of members.

FIG. 19 is a cross-sectional view schematically showing another example of the satellite radio-controlled wristwatch 1. FIG. 20 is a plan view showing an example of the arrangement of the conductive pin 41 and the high-dielectric member 36b. FIG. 21 is a plan view showing an example of the arrangement of the back cover 39 and the high dielectric member 36 g. In the example of FIGS. 19 to 21, the high-dielectric members 36b, 36g also cover the lower side and the outer peripheral side of the movement 59 including the baran substrate 43 and the circuit module 47. In FIG. 19, for convenience of explanation, the operating member 65 is shown so as to have the same cross section as the conductive pin 41, the balun substrate 43, and the like. However, in reality, the balun substrate 43 and the conductive pin 41 are not arranged above the operating member 65 (see FIG. 20). FIG. 21 is a plan view of the high-dielectric member 36 g, the back cover 39, and the ground wiring 64 as viewed from above.

The high-dielectric member 36b is a tubular member, and is arranged so as to surround the outer peripheral side of the movement 59 including the baran substrate 43 and the circuit module 47. The high-dielectric member 36b is provided with an opening 36u for passing the operating member 65. Further, the high dielectric member 36g is provided between the movement 59 and the back cover 39. The high-dielectric member 36g is provided with an opening 36w for passing the ground wiring 64. The ground wiring 64 electrically connects the wiring in the circuit module 47 and the balun board 43 with the back cover 39, and supplies the ground potential to the circuit module 47 and the balun board 43. The high-dielectric member 36g is in contact with the lower end of the high-dielectric member 36b.

In the examples of FIGS. 19 to 21, a member having a high dielectric constant is also arranged between the receiving circuit 22 that handles high frequencies and the outer case. As a result, the influence of the metal of the outer case on the balun circuit 21 and the receiving circuit 22 can be reduced, and the receiving sensitivity can be improved. Here, the openings 36u and 36w are provided only to the minimum necessary, and the sizes of the openings 36u and 36w are sufficiently smaller than the wavelengths of the received high frequencies, so that the actual reception sensitivity of the openings 36u and 36w is The decline is minimized.

The opening 36w through which the ground wiring 64 passes may be provided on the side of the high dielectric member 36b. In this case, the ground wiring 64 passing through the opening 36w is provided on the outer peripheral surface of the circuit module 47.

Although the case where the present invention is applied to the satellite radio-controlled wristwatch 1 has been described so far, the present invention can also be applied to, for example, a small portable timepiece different from the wristwatch.

1 Satellite radio watch, 10a, 10b antenna, 20 connection wiring, 21 balun circuit, 21a, 21b coil, 22 receiving circuit, 31 windshield, 32 bezel, 32e overhang, 34 dial ring, 34m, 34n notch, 34p Protruding part, 34r, 34q, 34s opening, 36a, 36b, 36c, 36d, 36e, 36g High dielectric member, 36p protruding part, 36q, 36r, 36s, 36t, 36u, 36w opening, 38 body, 39 back cover, 41 Conductive pin, 43 balun board, 45 coaxial pin, 47 circuit module, 51 dial, 52a hour hand, 52b minute hand, 52c second hand, 59 movement, 61 blindfold area, 64 ground wiring, 65 operating member.

Claims (9)

With the windshield
With a metal outer case including the back cover,
The antenna placed on the back side of the windshield and
The dial placed in the outer case and
Conductive pins, one end of which is in contact with the antenna and constitutes a circuit that connects the antenna to the receiving circuit.
A high-dielectric member that covers the outside of the conductive pin and is arranged inside the outer case.
Includes a cover member disposed between the windshield and the dial.
The cover member comprises a notch or opening through which the conductive pin is inserted.
The high dielectric member is placed in the notch or opening.
Radio clock. With the windshield
With a metal outer case including the back cover,
The antenna placed on the back side of the windshield and
The dial placed in the outer case and
Conductive pins, one end of which is in contact with the antenna and constitutes a circuit that connects the antenna to the receiving circuit.
A high-dielectric member that covers the outside of the conductive pin and is arranged inside the outer case.
Includes a cover member disposed between the windshield and the dial.
The cover member comprises a notch or opening through which the conductive pin is inserted.
The cover member has a protruding portion that is adjacent to the conductive pin and projects in a direction away from the windshield.
The protrusion comprises a notch in which the high dielectric member is located.
Radio clock. With the windshield
With a metal outer case including the back cover,
The antenna placed on the back side of the windshield and
The dial placed in the outer case and
Conductive pins, one end of which is in contact with the antenna and constitutes a circuit that connects the antenna to the receiving circuit.
A high-dielectric member that covers the outside of the conductive pin and is arranged inside the outer case.
Includes a balun circuit located between the antenna and the back cover.
The conductive pin electrically connects the antenna and the balun circuit.
The high-dielectric member covers the outside of the balun circuit and is arranged inside the exterior case .
Before Symbol high dielectric member is further disposed between said balun and said back cover,
Radio clock. With the windshield
With a metal outer case including the back cover,
The antenna placed on the back side of the windshield and
The dial placed in the outer case and
Conductive pins, one end of which is in contact with the antenna and constitutes a circuit that connects the antenna to the receiving circuit.
A high-dielectric member that covers the outside of the conductive pin and is arranged inside the outer case.
Includes a balun circuit located between the antenna and the back cover.
The conductive pin electrically connects the antenna and the balun circuit.
The high-dielectric member covers the outside of the balun circuit and is arranged inside the exterior case.
The high-dielectric member has an opening through which the conductive pin is inserted and covers the dial side of the balun circuit.
Radio clock. With the windshield
With a metal outer case including the back cover,
The antenna placed on the back side of the windshield and
The dial placed in the outer case and
Conductive pins, one end of which is in contact with the antenna and constitutes a circuit that connects the antenna to the receiving circuit.
A high-dielectric member that covers the outside of the conductive pin and is arranged inside the outer case.
A movement that is located between the dial and the back cover and includes the receiving circuit.
It has a second highly dielectric member including a first portion covering the back cover side of the movement and a second portion covering the outer peripheral side of the movement.
Radio clock. In the radio-controlled timepiece according to claim 5.
The second portion of the second high dielectric member is made of resin.
Radio clock. In the radio clock according to claim 5 or 6,
The second high dielectric member has an opening or a notch.
Radio clock. In the radio-controlled timepiece according to claim 7.
Further comprising an operating member inserted through an opening or notch included in the second high dielectric member.
Radio clock. In the radio-controlled timepiece according to claim 7.
Further including a ground wire inserted through an opening or notch included in the second high-dielectric member.
Radio clock.

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