JP4747838B2 - Electronic clock with built-in antenna - Google Patents

Description

  The present invention relates to an antenna built-in type electronic timepiece represented by a radio-controlled timepiece that receives external wireless information including time information and performs processing such as time correction.

Conventionally, an electronic timepiece with a built-in antenna such as a radio-controlled timepiece that receives time information from the outside and corrects the time is known (see, for example, Patent Document 1).
In a conventional electronic timepiece with a built-in antenna, when the antenna is housed in a metal outer case, as shown in FIG. 19, some magnetic flux lines 102 of radio waves received by the antenna 10 pass through the outer case 101. An eddy current 103 is generated in the outer case 101.
As described above, the eddy current loss generated when a part of the magnetic flux lines 102 generated from the antenna 10 passes through the exterior case 101 causes the conventional electronic timepiece with a built-in antenna to be guided to the coil 104 of the antenna 10. The alternating current decreased and the antenna characteristics deteriorated.

  Therefore, in the electronic timepiece with a built-in antenna disclosed in Patent Document 1, an eddy current is generated from the metal part between the metal outer case 101 and the antenna 10 with a high permeability that is more easily magnetized than the metal part, as shown in FIG. A low-conductivity magnetic member 105 that is difficult to perform is disposed so that a part of the magnetic flux lines 102 that have passed through the exterior case 101 pass through the magnetic member 105. As a result, the generation amount of eddy current is reduced, and the loss of eddy current is reduced, thereby suppressing the deterioration of antenna characteristics.

JP 2005-164354 A

By the way, the magnetic member in the conventional electronic timepiece with a built-in antenna is attached to the inner surface of the exterior case. The antenna is arranged inside a module (movement) housed in the exterior case. For this reason, a gap is provided between the magnetic member attached to the inner surface of the exterior case and the module so that the outer peripheral surface of the module does not contact the magnetic member.
However, the greater the gap between the magnetic member and the antenna, the smaller the effect of suppressing the deterioration of the antenna characteristics of the magnetic member. Therefore, when a gap of a predetermined dimension is provided between the magnetic member and the module, the antenna characteristics of the magnetic member are increased by the gap The effect of suppressing the decrease was small.

  An object of the present invention is to provide an electronic timepiece with a built-in antenna that can efficiently suppress deterioration of antenna characteristics of an antenna disposed inside a metal exterior case.

An electronic timepiece with built-in antenna of the present invention includes an exterior case having a case and a back cover, an antenna that receives external wireless information, a receiving means that processes external wireless information received by the antenna, and the antenna and the receiving means. A module disposed inside and housed in an exterior case, wherein the cylinder is made of at least a part of metal, and on a side surface of the module facing the cylinder, a side protrusion that abuts the cylinder and A side arrangement portion is formed that is separated from the body by the protrusion dimension of the side protrusion, and a side magnetic member having a higher magnetic permeability and lower conductivity than the body is formed on the side arrangement portion. The thickness of the side magnetic member in the protruding direction of the side protruding portion is set in the protruding direction of the side protruding portion. Dimensions Is also set small, the antenna is constituted by a coil wound around the magnetic core and the magnetic core, the magnetic core, the core center and both ends of the core central portion in which the coil is wound The magnetic core is formed linearly along the axial direction of the coil, and the position of the coil in the axial direction at one end of the side magnetic member is Between the position of one end of the coil along the axial direction of the coil and the position of one end of the magnetic core, the axial position of the coil at the other end of the side magnetic member is the axis of the coil Between the position of the other end portion of the coil along the direction and the position of the other end portion of the magnetic core, in a portion continuous to the core center portion at both end portions of the core, on the side surface facing the trunk side, The inclined surface is Are provided, each inclined surface with respect to the axial direction of the coil, respectively, and being inclined in a direction opposite to the other inclined surface.

The electronic timepiece with built-in antenna of the present invention includes an exterior case having a case and a back cover, an antenna that receives external wireless information, a receiving means that processes external wireless information received by the antenna, the antenna and the reception A module disposed inside and housed in an exterior case, wherein the cylinder is made of at least a part of metal, and a side surface of the module facing the cylinder protrudes from the side of the module. A side portion arranged to be separated from the portion and the body by the protruding dimension of the side protrusion is formed, and the side portion arranged in the side portion has a higher magnetic permeability and a lower conductivity than the case. Is disposed between the antenna and the cylinder closest to the antenna, and the thickness dimension of the side magnetic member in the protruding direction of the side protruding portion is the protrusion of the side protruding portion. Direction The planar shape of the inner peripheral surface of the trunk is formed in a circle, the antenna is composed of a magnetic core and a coil wound around the magnetic core, and the magnetic core is The core is formed by a core central portion around which the coil is wound and core both ends extending at both ends of the core central portion. The core both end portions are formed in a planar arc shape along the inner peripheral surface of the body. The position of the side magnetic member at one end is closer to the one end of the magnetic core than the position of the one end of the coil, and from the center of the circle drawn by the inner peripheral surface of the body, The straight line extending toward the one end is positioned closer to the coil than the position where the side of the module intersects, and the other end of the magnetic core is positioned at the other end of the side magnetic member rather than the position of the other end of the coil. And the inner circumference of the torso Is a coil side with respect to the position where the straight line extending from the center of the circle drawn toward the other end of the magnetic core intersects the side surface of the module, and is continuous to the center of the core at both ends of the core. Each of the inclined surfaces is provided with an inclined surface, and each inclined surface is inclined in a direction opposite to another inclined surface with respect to the axial direction of the coil.
In each invention of these, as the side magnetic member, the binder such as silicon rubber, those formed into a sheet by dispersing magnetic metal powder of a ferrite material or an amorphous material or the like mainly composed of Fe Available. Alternatively, a plate-like material such as a ferrite sintered material or an amorphous foil having a higher magnetic permeability and superior magnetic properties than the sheet shape can also be used.

  According to the present invention, the module is accommodated in the exterior case having the trunk, and the antenna is disposed inside the module together with the receiving means. When this antenna receives external wireless information (radio waves), magnetic flux lines are generated around the antenna. The magnetic flux lines pass through a side magnetic member arranged between the antenna and the body closest to the antenna in a side arrangement portion formed on the side surface of the module. At this time, the side magnetic member has a magnetic permeability higher than that of at least a part of the body made of metal, so that the magnetic flux lines easily pass through the inside, and the conductivity is lower than that of the body. Almost no eddy current is generated even though the inside passes through. In addition, as a structure which arrange | positions a side part magnetic member in a side part arrangement | positioning part, a side part magnetic member may be closely_contact | adhered with an adhesive etc. to a side part arrangement | positioning part, and it may affix with a double-sided tape etc., You may insert between a trunk | drum and a module and may arrange | position on the module side.

Further, the magnetic flux lines have a characteristic that the density of the magnetic flux lines decreases as the distance from the antenna increases. More than the case where the side magnetic member is arranged on the inner peripheral surface of the cylinder, for example, the side magnetic member is arranged in the side arrangement part provided by separating the protruding dimension of the side protrusion from the cylinder. The side magnetic member is arranged close to the antenna. Therefore, the side magnetic member can easily pass more magnetic flux lines.
Then, since the magnetic flux lines hardly pass through the cylinder, eddy current loss due to passing through the cylinder hardly occurs. Therefore, it is possible to efficiently suppress the deterioration of the antenna characteristics of the antenna disposed in the exterior case having a trunk made at least part of metal.

On the other hand, when the side magnetic member is arranged on the side surface of the module, if a gap is provided between the body and the side magnetic member, the positioning of the module stored in the outer case may be uneven.
According to the present invention, since the side protruding portion that contacts the cylinder is formed on the side surface of the module facing the cylinder, the module can be uniformly positioned in the exterior case by the side protruding portion.
At this time, the side portion where the side magnetic member is disposed is formed away from the body by the protruding dimension of the side protruding portion, and the thickness dimension of the side magnetic member is the protruding direction of the side protruding portion. Therefore, the module can be smoothly accommodated in the exterior case without the side magnetic member and the body coming into contact with each other, and the side magnetic member can be protected.

  In each of the above inventions, each inclined surface includes an inclined surface provided at one end of one core extending at one end of the core central portion, and the other core extended at the other end of the core central portion. The inclined surface provided in the both ends is shown.
  A magnetic flux line of radio waves passing through the antenna coil has a characteristic that it exits from the surface of both ends of one core where the coil is not wound to the outside of the magnetic core in a direction perpendicular to the surface. This magnetic flux line passes through the space around the antenna and enters the inside of the magnetic core in the direction perpendicular to this surface to the surface of both ends of the other core. At this time, the path of the magnetic flux lines changes depending on which direction the surfaces of both ends of the core are directed.

  Therefore, according to this invention, the inclined surface is formed in the side which faces the trunk | drum in the part which continues to the core center part in the core both ends where magnetic flux lines enter / exit. Each inclined surface is inclined in a direction opposite to the other inclined surface with respect to the axial direction of the coil. For this reason, compared with the case where the inclined surface is not formed and the side surfaces of both ends of the core are parallel to the axial direction of the coil, the magnetic flux lines are in a direction closer to the other inclined surface from one inclined surface. Go out and go through the space near the coil into the other sloping surface.

  Thus, the path of the magnetic flux lines connecting the inclined surfaces can be made closer to the antenna than when these inclined surfaces are not formed. Then, the amount of magnetic flux lines that pass through the space between the antenna and the module side surface increases, and a part of the magnetic flux lines that have passed through the side magnetic member when the inclined surface is not formed pass through the space. It becomes like this. When the magnetic flux lines pass through the side magnetic member, an eddy current is generated although it is slight. This eddy current is very small as compared with the case of passing through the outer case, but loss occurs. On the other hand, if even part of the magnetic flux lines pass through the space, the eddy current loss can be reduced accordingly. Therefore, it is possible to efficiently suppress the antenna characteristic deterioration of the antenna.

According to the first invention, the axial position of the coil at one end and the other end of the side magnetic member is more than the position of the one end and the other end of the coil along the axial direction of the coil. The position is on the tip side of the magnetic core. In other words, since the side magnetic member protrudes at least from both ends of the coil and is disposed up to the tip end side of the magnetic core, the magnetic flux lines coming out from one end of the magnetic core and entering the other end are connected to the side magnetic member. It is possible to efficiently pass through the inside. Therefore, it is possible to efficiently suppress the antenna characteristic deterioration of the antenna.
Further, when the side magnetic member is arranged so as to cover a range wider than the range of the magnetic core, the reception sensitivity of the antenna deteriorates because the side magnetic member inhibits reception of radio waves entering from the end face of the magnetic core. There is a worry to do. According to this invention, the axial position of the coil at the one end and the other end of the side magnetic member is on the coil side with respect to the position of the one end and the other end of the magnetic core along the axial direction of the coil. It is said that the position. Since the magnetic flux lines have the property of going out of the magnetic core in the direction perpendicular to the surfaces of both ends of the core, when the magnetic core is formed linearly along the axial direction of the coil By arranging the side magnetic member so as to cover the range of the magnetic core in the axial direction of the coil, the magnetic flux lines generated from both ends of the magnetic core can be efficiently passed through the inside of the side magnetic member. In addition, good antenna reception sensitivity can be obtained.

Furthermore, according to the second invention, the positions of the inner peripheral direction of the cylinder at the one end and the other end of the side magnetic member are the one end of the magnetic core and the other from the center of the circle drawn by the inner peripheral surface of the cylinder. The position is closer to the coil than the position where each straight line extending toward the end and the side surface of the module intersect. Since the magnetic flux lines go out of the magnetic core in a direction perpendicular to the surfaces of both ends of the core, when both ends of the core are formed in a planar arc shape, the inner circumferential direction of the cylinder By arranging the side magnetic member so as to cover the range of the magnetic core in FIG. 1, the magnetic flux lines generated from both ends of the magnetic core can be efficiently passed through the side magnetic member and a good antenna Can be obtained.

  In the electronic timepiece with built-in antenna according to the present invention, the antenna includes a magnetic core and a coil wound around the magnetic core, and the magnetic core includes a core central portion around which the coil is wound and the core. Consists of both ends of the core extending at both ends of the central portion, the position of the module in the thickness direction at the upper end of the side magnetic member is above the upper end of the magnetic core in the thickness direction of the module The position in the thickness direction of the module at the lower end of the side magnetic member is preferably lower than the lower end of the magnetic core in the thickness direction of the module.

  According to this invention, the position in the thickness direction of the module at the upper end of the side magnetic member is above the upper end of the magnetic core in the thickness direction of the module, and the module at the lower end of the side magnetic member The position in the thickness direction is below the lower end of the magnetic core in the thickness direction of the module. That is, in the thickness direction of the module, the side magnetic members are arranged so as to cover at least both ends of the magnetic core, so that the magnetic flux lines that exit from one end of the magnetic core and enter the other end It can be efficiently passed through the inside of the member. Therefore, it is possible to efficiently suppress the antenna characteristic deterioration of the antenna.

  In the electronic timepiece with built-in antenna according to the present invention, the dimension between the one end of the core at both ends of the core and the barrel is set to be larger than the dimension between the other end of the core and the barrel. Is preferred.

  According to the present invention, since the space between the coil and the cylinder closest to the coil is set large, the magnetic flux lines coming out from one end on the core center side at both ends of the core are between the coil and the cylinder. Can pass through space. Therefore, it is possible to efficiently suppress the antenna characteristic deterioration of the antenna.

  According to the electronic watch with a built-in antenna of the present invention, the antenna characteristics of the antenna disposed in the exterior case having at least a part of the case made of metal or the back cover made of at least part of the metal are reduced. There exists an effect that it can suppress efficiently.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the following description, the same constituent elements are denoted by the same reference numerals, and the description thereof is omitted or simplified.
FIG. 1 is a front view of a radio wave correction timepiece 1 as an electronic timepiece with a built-in antenna according to an embodiment of the present invention.
The radio-controlled timepiece 1 is a pointer-type timepiece (analog timepiece) provided with hands 11, 12, 13 and a dial plate 14. Inside the timepiece 1, an antenna 21 for receiving a radio wave (external wireless information) including time information is disposed.

Next, the configuration of the radio-controlled timepiece 1 will be described based on the block diagram of FIG.
The radio-controlled timepiece 1 includes a receiving unit 2 that processes received radio waves, a drive control circuit unit 3, a driving unit 4 that drives a pointer, a counter unit 6 that counts time, and a power supply unit 7 that supplies power. In addition, an external input device 8 such as a crown is provided.

  The receiving means 2 includes an antenna 21 that receives radio waves, a tuning circuit unit 22 that is configured by a capacitor and tuned to radio waves received by the antenna 21, a reception circuit unit 23 that processes information received by the antenna 21, and a reception A time data storage circuit unit 24 that stores time data processed by the circuit unit 23 is provided.

As shown in FIG. 3, the tuning circuit unit 22 includes two capacitors 22A and 22B connected in parallel to the antenna 21, and one capacitor 22B is connected to the antenna 21 via a switch 22C. Has been.
The frequency of the radio wave received by the antenna 21 is switched by turning on or off the switch 22C according to a frequency switching control signal output from the drive control circuit unit 3. As a result, for example, in Japan, two types are output from the standard radio wave output station of Otakado and Mt. (East Japan) with a transmission frequency of 40 kHz and the standard radio wave output station of Mt. Hagane (West Japan) with a transmission frequency of 60 kHz. It is configured to be able to switch and receive a long wave standard radio wave having a frequency of.

As shown in FIG. 3, the receiving circuit unit 23 amplifies a long wave standard radio signal received by the antenna 21, and a bandpass filter that extracts only a desired frequency component from the amplified long wave standard radio signal. 232, a demodulation circuit 233 for smoothing and demodulating the long wave standard radio signal, an AGC (Automatic Gain Control) circuit 234 for controlling the gain of the amplification circuit 231 and controlling the reception level of the long wave standard radio signal to be constant, And a decoding circuit 235 that decodes and outputs the demodulated long wave standard radio wave signal.
The time data received and signal-processed by the receiving circuit unit 23 is output to and stored in the time data storage circuit unit 24 as shown in FIG.
The reception circuit unit 23 starts reception of time information based on a reception control signal output from the drive control circuit unit 3 by a preset schedule, a forced reception operation by the external input device 8, or the like.

  As shown in FIG. 2, the pulse signal from the pulse synthesis circuit 31 is input to the drive control circuit unit 3. The pulse synthesizing circuit 31 divides a reference pulse from a reference vibrator 311 such as a crystal vibrator to generate a clock pulse, and generates a pulse signal having a different pulse width and timing from the reference pulse.

  The drive control circuit unit 3 outputs a second drive pulse signal PS1 that is output once per second to drive the second hand, and an hour / minute drive pulse signal PS2 that is output once per minute to drive the hour / minute hand. 41, output to the hour / minute driving circuit 42 to control the driving of the hands. That is, each drive circuit 41, 42 drives a second motor 411, which is a stepping motor driven by a pulse signal from each circuit 41, 42, and an hour / minute motor 421, thereby being connected to each motor 411, 421. The second hand, the minute hand and the hour hand are driven. Each pointer, dial, motors 411 and 421, and drive circuits 41 and 42 constitute time display means for displaying the time. In addition, as a time display means, you may drive an hour hand, a minute hand, and a second hand with one motor.

The counter unit 6 includes a second counter circuit unit 61 that counts seconds and an hour / minute counter circuit unit 62 that counts hours and minutes.
The second counter circuit unit 61 includes a second position counter 611, a second time counter 612, and a coincidence detection circuit 613. The second position counter 611 and the second time counter 612 are both 60 counts, that is, a counter that loops in 60 seconds when a 1 Hz signal is input. The second position counter 611 counts the drive pulse signal (second drive pulse signal PS1) supplied from the drive control circuit unit 3 to the second drive circuit 41. That is, the position of the second hand indicated by the second hand is counted by counting the drive pulse signal for driving the second hand.
The second time counter 612 normally counts a 1 Hz reference pulse signal (clock pulse) output from the drive control circuit unit 3. When the time data is received by the receiving means 2, the counter value is corrected according to the second data of the time data.

Similarly, the hour / minute counter circuit unit 62 includes an hour / minute position counter 621, an hour / minute time counter 622, and a coincidence detection circuit 623. Both the hour / minute position counter 621 and the hour / minute time counter 622 are counters that loop when signals for 24 hours are input. The hour / minute position counter 621 counts the drive pulse signal (hour / minute drive pulse signal PS2) supplied from the drive control circuit unit 3 to the hour / minute drive circuit 42, and counts the position of the hour / minute hands indicated by the hour hand and minute hand. is doing.
The hour / minute time counter 622 normally counts 1 Hz pulses (clock pulses) output from the drive control circuit unit 3 (more precisely, 1 count is obtained when 1 Hz is counted 60 times). When the time data is received by the receiving means 2, the counter value is corrected according to the hour / minute data of the time data.

The coincidence detection circuits 613 and 623 detect the coincidence of the count values of the position counters 611 and 621 and the time counters 612 and 622 and output a detection signal indicating whether or not they coincide to the drive control circuit unit 3. To do.
When the mismatch signal is input from the match detection circuits 613 and 623, the drive control circuit unit 3 continues to output the drive pulse signals PS1 and PS2 until the match signal is input. For this reason, during normal hand movement, when the counter values of the time counters 612 and 622 are changed by the reference signal of 1 Hz from the drive control circuit unit 3 and do not coincide with the position counters 611 and 621, the drive pulse signals PS1 and PS2 are As each pointer is output and moved, the position counters 611 and 621 coincide with the time counters 612 and 622. By repeating this operation, normal hand movement control is performed.
When the time counters 612 and 622 are corrected with the received time data, the drive pulse signals PS1 and PS2 are continuously output until the counter values of the position counters 611 and 621 coincide with the counter values. Is fast-forwarded and corrected to the correct time.

The power supply means 7 includes a power generator 71 as a power generator configured by a self-winding generator, a solar battery (solar generator), and the like, and a high-capacity secondary power source 72 that stores power generated by the power generator 71. It is configured with. As the high capacity secondary power source 72, a secondary battery such as a lithium ion battery can be used. As the power supply means 7, a primary battery such as a silver battery may be used.
The external input device 8 as an external input means includes a crown or the like, and is used for performing a reception operation, time adjustment, and the like.

Next, the structure of the radio-controlled timepiece 1 will be described with reference to FIGS.
The radio-controlled timepiece 1 includes a casing (trunk) 91 formed in a ring shape, a cover glass 92 attached to the front surface side of the casing 91, and a back lid 93 detachably attached to the back surface side of the casing 91. I have. The casing 91 and the back cover 93 are made of a metal material such as stainless steel, brass, or titanium. The casing 91, the cover glass 92, and the back cover 93 constitute the outer case 9 in the present embodiment. A module (movement) 94 is accommodated in the exterior case 9, and the antenna 21, receiving means, and the like are disposed inside the module 94.

The antenna 21 includes a magnetic core 211 and a coil 212 wound around the magnetic core 211.
The magnetic core 211 is formed by, for example, punching a cobalt-based amorphous foil (for example, amorphous foil of Co 50 wt% or more) with a mold or bonding approximately 10 to 30 formed by etching, and superimposing, annealing, etc. To stabilize the magnetic characteristics. That is, the magnetic core 211 is configured by laminating planar amorphous foils in the thickness direction of the watch. Note that the magnetic core 211 is not limited to the laminated amorphous foil, and ferrite may be used. In this case, the magnetic core 211 may be formed by a mold or the like and heat-treated.

The magnetic core 211 includes a core central portion 211A around which the coil 212 is wound, and core both end portions 211B extending at both ends of the core central portion 211A.
As shown in FIG. 5, the core central portion 211A has a square cross section and a rectangular plane.
As shown in FIG. 4, the core both end portions 211 </ b> B are formed in a circular arc shape whose plane shape is substantially concentric with the inner periphery of the casing 91, and is disposed along the inner surface of the casing 91. In addition, inclined surfaces 211C and 211D are respectively provided on the side surfaces facing the casing 91 at portions that are continuous with the core center portion 211A at both core end portions 211B.
The inclined surfaces 211C and 211D are inclined with respect to the axial direction of the coil 212 in a direction opposite to the other inclined surfaces 211C and 211D, respectively. That is, the angles (angles θ1 and θ2 in FIG. 4) formed by the inclined surfaces 211C and 211D and the end surfaces 212A and 212B of the coil 212 adjacent to the inclined surfaces 211C and 211D are set to be acute angles. When the inclined surfaces 211C and 211D are set in this way, the normal lines of the inclined surfaces 211C and 211D intersect.

  The coil 212 needs an inductance value of about 10 mH when receiving a long-wave standard radio wave (40 to 77.5 kHz). For this reason, in this embodiment, the coil 212 is formed by winding a uremet wire having a diameter of about 0.1 μm for several hundred turns.

In the case of an analog electronic timepiece, the module 94 indicates a timepiece mechanism portion, has a planar circular shape, and each of the above-described components is incorporated therein. That is, the module 94 incorporates the receiving means 2 including the antenna 21, the drive control circuit unit 3, the drive unit 4, the counter unit 6, and the power supply unit 7 shown in FIG. 2.
As shown in FIG. 5, the side surface of the module 94 facing the casing 91 is provided with a side protrusion 941 that abuts the casing 91 and a distance from the casing 91 by the protrusion dimension of the side protrusion 941. A side arrangement portion 942 is formed.
When the module 94 is housed in the casing 91, the side protrusion 941 comes into contact with the inner surface of the casing 91 so that the position on the plane in the casing 91 is fixed.
In the side arrangement portion 942, a sheet-like flexible side magnetic member 95 made of a magnetic member having higher permeability and lower conductivity than the casing 91 is provided with the antenna 21 and the casing closest to the antenna 21. 91 is disposed in close contact with each other.
Here, the thickness dimension of the side magnetic member 95 in the protruding direction of the side protruding portion 941 is set to be smaller than the dimension of the side protruding portion 941 in the protruding direction. There is a gap between them.

The bottom surface of the module 94 that faces the back cover 93 has a bottom protrusion 943 that contacts the back cover 93 and a bottom placement part 944 that is provided away from the back cover 93 by the protrusion dimension of the bottom protrusion 943. Is formed.
When the module 94 is housed in the casing 91 and covered with the back cover 93, the position of the module 94 in the thickness direction in the casing 91 is fixed by the bottom protrusion 943 coming into contact with the inner surface of the back cover 93.
A sheet-like bottom magnetic member 96 made of a magnetic member having a higher magnetic permeability and lower conductivity than the back cover 93 is disposed between the antenna 21 and the back cover 93 closest to the antenna 21. It arrange | positions closely so that it may be located in.
Here, the thickness dimension of the bottom magnetic member 96 in the projecting direction of the bottom projecting part 943 is set smaller than the dimension in the projecting direction of the bottom projecting part 943, and the gap between the bottom magnetic member 96 and the back cover 93 is set. Is provided with a gap.

The position of the side magnetic member 95 at one end is closer to one core both ends 211B, which is one end of the magnetic core 211 than the position of one end of the coil 212, and the other end of the side magnetic member 95. The position in the part is set to the other core end part 211B side which is the other end part of the magnetic core 211 relative to the position of the other end part of the coil 212. That is, the side magnetic member 95 is disposed so as to cover at least both ends of the coil 212 (range A2 in FIG. 4).
On the other hand, the position at one end of the side magnetic member 95 is greater than the position at which the straight line extending from the center O1 of the circle drawn by the inner peripheral surface of the casing 91 toward the tip position of one core end 211B intersects the side surface of the module 94. The position of the side magnetic member 95 at the other end of the coil 212 is a straight line extending from the center O1 of the circle drawn by the inner peripheral surface of the casing 91 toward the tip of the other core end 211B. It is on the coil 212 side from the position intersecting the 94 side surface. That is, the side magnetic member 95 is arranged so as to cover a range smaller than a range (range A1 in FIG. 4) from one end to the other end of the magnetic core 211 in the inner peripheral direction of the casing 91.

  The position in the thickness direction of the module 94 at the upper end portion of the side magnetic member 95 is above the upper end portion of the magnetic core 211 in the thickness direction of the module 94, and the module at the lower end portion of the side magnetic member 95. The position of 94 in the thickness direction is below the lower end of the magnetic core 211 in the thickness direction of the module 94. That is, the side magnetic member 95 is disposed so as to cover at least both ends (range B in FIG. 5) of the magnetic core 211.

  The position of the coil 212 in the axial direction at one end of the bottom magnetic member 96 is the position of one end of the magnetic core 211 from the position of one end of the coil 212 along the axial direction of the coil 212. The position of the other end of the bottom magnetic member 96 in the axial direction of the coil 212 is determined from the position of the other end of the coil 212 along the axial direction of the coil 212. It is between the position of the front-end | tip of the other core both ends 211B which is an edge part. That is, the bottom magnetic member 96 is disposed so as to cover at least both ends of the coil 212, and is disposed so as to cover a range smaller than the range from one end to the other end of the magnetic core 211 (range F in FIG. 4). Has been.

  Positions in the orthogonal direction of the axis of the coil 212 at both ends of the bottom magnetic member 96 are arranged on the bottom surface of the module 94 so as to cover a wider range than the range in the width direction of the antenna 21 (range C in FIG. 4). .

Each of the magnetic members 95 and 96 is formed in a sheet shape by dispersing a metal magnetic powder such as a ferrite material or an amorphous material mainly composed of Fe in a binder such as silicon rubber. And each magnetic member 95,96 is affixed on each arrangement | positioning part 942,944 of the module 94 with a double-sided tape or an adhesive agent.
Here, when the strength of the casing 91 and the module 94 can be secured even if the projecting dimensions of the projecting portions 941 and 943 are set large, the magnetic members 95 and 96 are more transparent than the sheet shape. It is also possible to use a plate-like material such as a ferrite sintered material or an amorphous foil having a magnetic susceptibility and excellent magnetic properties. However, the ferrite sintered material has drawbacks such as being easily broken by impact and difficult to process a complicated shape. Therefore, a sheet-like magnetic member that is easy to bend is preferable when it is attached to the outer periphery of the module 94 as in this embodiment.
Further, in addition to the magnetic members 95 and 96 that are incorporated as a single component such as the above-described sheet shape or plate shape, the magnetic members 95 and 96 are adhered to the arrangement portions 942 and 944 of the module 94 by film formation as in vapor deposition plating. It may be of a different form.

  In the radio-controlled timepiece 1 having such a configuration, when the antenna 21 receives radio waves, magnetic flux lines 97A to 97D are emitted as shown in FIG. FIG. 6 schematically shows magnetic flux lines 97A to 97D emitted from the core both ends 211B to the casing 91 side.

Therefore, according to the present embodiment, the following effects can be achieved.
(1) Since the magnetic flux lines hardly pass through the casing 91 and the back cover 93, eddy current loss due to passing through the casing 91 and the back cover 93 hardly occurs. Therefore, it is possible to efficiently suppress the deterioration of the antenna characteristics of the antenna 21 arranged at least partially inside the exterior case 9 made of metal.
Details will be described with reference to FIG. The magnetic flux lines 97 emitted from the antenna 21 spread radially from the magnetic core 211, and the density of the magnetic flux lines 97 decreases as the distance between the magnetic flux lines 97 increases. Therefore, the density of the magnetic flux lines 97 increases as the distance from the antenna 21 increases. It is getting smaller. When the magnetic members 951 and 952 having the same cross-sectional shape are arranged at different intervals with respect to the antenna 21 with respect to such a magnetic flux line 97, the magnetic member 951 closer to the antenna 21 passes the amount of the magnetic flux line 97 that passes therethrough. Will increase.
Therefore, as shown in FIG. 5, the side portion in which the side magnetic member 95 and the bottom magnetic member 96 are provided apart from the casing 91 and the back cover 93 by the protruding dimensions of the side protruding portion 941 and the bottom protruding portion 943. For example, when the magnetic members 95 and 96 are arranged on the inner peripheral surface of the casing 91 and the inner surface of the back cover 93, the magnetic members 95 and 96 are arranged in close contact with the arrangement portion 942 and the bottom portion arrangement portion 944, respectively. The members 95 and 96 are arranged close to the antenna 21. Therefore, most of the magnetic flux lines easily pass through the magnetic members 95 and 96, and eddy current loss due to passing through the casing 91 and the back cover 93 hardly occurs. Therefore, the antenna characteristics of the antenna 21 can be effectively reduced. Can be suppressed.

(2) Since a plurality of side protrusions 941 and bottom protrusions 943 that are in contact with the casing 91 and the back cover 93 are formed on the side surface and the bottom surface of the module 94 facing the casing 91 and the back cover 93, When the module 94 is stored in the outer case 9, the module 94 can be uniformly positioned in the outer case 9.

(3) The side portion 942 on which the side magnetic member 95 is disposed is formed by separating the protruding dimension of the side protruding portion 941 from the casing 91, and the thickness dimension of the side magnetic member 95 is the side protruding portion. It is set smaller than the dimension in the protruding direction of the portion 941. In addition, the bottom portion arrangement portion 944 where the bottom portion magnetic member 96 is disposed is formed by separating the protrusion dimension of the bottom protrusion portion 943 from the back cover 93, and the thickness dimension of the bottom magnetic member 96 is the protruding direction of the bottom protrusion portion 943. It is set smaller than the dimension. Accordingly, the side magnetic member 95 and the casing 91 do not come into contact with each other, and the bottom magnetic member 96 and the back cover 93 do not come into contact with each other. Therefore, the module 94 can be smoothly accommodated in the exterior case 9. The side magnetic member 95 and the bottom magnetic member 96 can be protected.

(4) Even in the exterior case 9 in which the casing 91 and the back cover 93 are all made of metal, it is possible to efficiently suppress the deterioration of the antenna characteristics of the antenna 21 disposed inside the exterior case 9, and The appearance of the radio-controlled timepiece 1 can be improved and the product value can be increased.

(5) When the side magnetic member 95 and the bottom magnetic member 96 are arranged on the inner surface of the outer case 9, when the module 94 is housed in the outer case 9, It is necessary to align the magnetic members 95 and 96 disposed. In this respect, in the present embodiment, when the magnetic members 95 and 96 are arranged on the outer surface of the module 94, the antenna 21 in the module 94 and the magnetic members 95 and 96 can be easily aligned. Can be simplified in the positioning operation when the case is stored in the outer case 9.

(6) The side magnetic member 95 is disposed on the side surface of the module 94 so as to cover at least both ends of the coil 212, and covers a range smaller than the range from one end to the other end of the magnetic core 211. Is arranged. Further, in the thickness direction of the module, the side magnetic member 95 is disposed so as to cover at least both ends of the magnetic core 211. Therefore, the magnetic flux lines emitted from the antenna 21 toward the casing 91 can be efficiently passed through the side magnetic member 95. Therefore, it is possible to obtain good reception sensitivity of the antenna 21 and to efficiently suppress the deterioration of the antenna characteristics of the antenna 21.

(7) The bottom magnetic member 96 is disposed on the bottom surface of the module 94 so as to cover at least both ends of the coil 212 along the axial direction of the coil 212, and from one end to the other end of the magnetic core 211. It arrange | positions so that the range smaller than a range may be covered. Further, both end portions of the bottom magnetic member 96 along the direction orthogonal to the axis of the coil 212 are arranged so as to cover a range wider than the range of the antenna 21 in the width direction. Therefore, the magnetic flux lines emitted from the antenna 21 toward the back cover 93 can be efficiently passed through the bottom magnetic member 96. Therefore, it is possible to obtain good reception sensitivity of the antenna 21 and to efficiently suppress the deterioration of the antenna characteristics of the antenna 21.

(8) The path of the magnetic flux line connecting one inclined surface 211D to the other inclined surface 211C can be made a short path closer to the antenna 21 than when these inclined surfaces 211C and 211D are not formed ( Magnetic flux lines 97A in FIG. Then, the amount of magnetic flux lines that pass through the air layer between the antenna 21 and the side surface of the module 94 increases, and a part of the magnetic flux lines that have passed through the casing 91 when the inclined surfaces 211C and 211D are not formed. It passes through the side magnetic member 95. Accordingly, it is possible to efficiently suppress the antenna characteristic deterioration of the antenna 21.
That is, the magnetic flux lines exit the magnetic core 211 from the surface of one core end portion 211B toward the normal direction of the surface, pass through the space around the antenna 21, and the other core end portion 211B. There is a characteristic of entering the inside of the magnetic core 211 toward the surface in the normal direction of the surface. In the present embodiment, inclined surfaces 211C and 211D are formed on both end portions 211B of the core, respectively, and one inclined surface 211C is inclined in a direction facing the other inclined surface 211D with respect to the axial direction of the coil 212. That is, the normal lines of the inclined surfaces 211C and 211D intersect. Then, for example, compared with the case where the inclined surfaces 211C and 211D are not formed and the side surfaces of the core end portions 211B are parallel to the axial direction of the coil 212, the magnetic flux lines are transferred from one inclined surface 211D to the other. It goes out in a direction approaching the inclined surface 211C, passes through the air layer close to the coil 212, and enters the other inclined surface 211C. In this way, when the inclined surfaces 211C and 211D are not formed, a part of the magnetic flux lines that have passed through the casing 91 pass through the side magnetic member 95, and the antenna characteristics of the antenna 21 are efficiently reduced. It can be well suppressed.

(9) Since the side magnetic member 95 and the bottom magnetic member 96 are arranged on the side surface and bottom surface of the module 94, gaps are provided between the side arrangement portion 942 and the casing 91 and between the bottom arrangement portion 944 and the back cover 93, respectively. Yes. However, since the side projection 941 and the bottom projection 943 are formed on the side surface and the bottom surface of the module 94, the module 94 is uniformly positioned in the outer case 9, and has a structure that is strong against impacts such as dropping. can do.

It should be noted that the present invention is not limited to the above-described embodiments, and modifications, improvements, and the like within the scope that can achieve the object of the present invention are included in the present invention.
For example, in the above-described embodiment, the sheet-like flexible side magnetic member 95 is attached to the side arrangement portion 942 of the module 94 with a double-sided tape or an adhesive. 9, the plate-like side magnetic member 95 formed in a planar arc shape is inserted between the module 94 </ b> A and the casing 91, thereby arranging the side magnetic member 95 in the side arrangement portion 942. May be. At this time, on the side surface of the module 94A, the first and second projecting portions 945 and 946 project toward the casing 91 adjacent to the side portion of the module 94A in the circumferential direction of the module 94A. ing. By these first and second projecting portions 945 and 946, the circumferential position of the side surface of the module 94A in the side magnetic member 95 can be regulated. Alternatively, as shown in FIGS. 10 and 11, third and fourth projecting portions 947, from the side protrusions 941 toward the back cover 93, at positions sandwiching the side magnetic members 95 in the circumferential direction of the module 94 </ b> B. Each of 948 may be overhanging. The circumferential position of the side surface of the module 94B in the side magnetic member 95 can also be fixed by the third and fourth overhang portions 947 and 948.

Further, the side magnetic member 95 is arranged in a range larger than the range A2 in FIG. 4 and smaller than the range A1, but in the present invention, as shown in FIG. You may arrange | position so that it may become the longest width | variety in range A1. That is, when the planar shape of the inner peripheral surface of the casing 91 is formed in a circular shape and the core end portions 211B are formed in a planar arc shape along the inner peripheral surface of the casing 91, one end of the side magnetic member 95A. The position of the portion is a position where a straight line extending from the center O1 of the circle drawn by the inner peripheral surface of the casing 91 toward the tip position of one core end portion 211B which is one end portion of the magnetic core 211 intersects the side surface of the module 94. In addition, the position at the other end of the side magnetic member 95A may be a position where a straight line extending from the center O1 of the circle toward the tip of the other core end 211B intersects the side surface of the module 94. (Range A1 in FIG. 12).
According to such a configuration, the magnetic flux lines go out of the magnetic core 211 in a direction perpendicular to the surfaces of the core end portions 211B, so the core end portions 211B are formed in a planar arc shape. In this case, by arranging the side magnetic member 95A so as to cover the range of the magnetic core 211 in the inner peripheral direction of the casing 91, the magnetic flux lines generated from the forefront of the magnetic core 211 are also transferred to the side portion. While being able to pass through the magnetic member 95A more efficiently, it is possible to obtain good antenna reception sensitivity.

  In the embodiment, the inclined surfaces 211C and 211D are formed on the core both ends 211B. However, in the present invention, as shown in FIG. 13, the antenna 21 has inclined surfaces formed on the core both ends 211B. It may not be.

  In the present invention, as shown in FIG. 14, the antenna 21 may have a wider width in the direction perpendicular to the axis of the core both ends 211 </ b> B. Thus, when the area in the plane of the core both ends 211B is set large, the antenna 21 can easily take in the radio waves through the core both ends 211B. Therefore, the radio wave reception sensitivity of the antenna 21 can be improved. Furthermore, as shown in FIG. 15, the antenna 21 may have inclined surfaces 211 </ b> C and 211 </ b> D formed at both end portions 211 </ b> B of the core.

Moreover, in the said embodiment, although the core both ends 211B were formed in planar arc shape along the inner periphery of the casing 91, in this invention, as shown in FIG. It may be formed in a plane linear shape along the axis.
When the antenna 21 having such a shape is arranged in the module 94, the shortest distance (dimension D in FIG. 16) between the coil-side end of the core both ends 211B and the casing 91 is the tip of the core both ends 211B. And the shortest distance between the casings 91 (dimension E in FIG. 16). Then, among the magnetic flux lines 97 emitted from both ends 211B of the core, for example, the magnetic flux lines 97A to 97C pass through the casing 91 because they pass through the air layer widely provided between the antenna 21 and the side magnetic member 95. The amount of the magnetic flux lines 97 is reduced, and the effect of the side magnetic member 95 can be increased.
However, if the space between the antenna 21 and the side magnetic member 95 is wide, there is almost no configuration of the module 94 that can be arranged in the space, and the arrangement restrictions of each configuration in the module 94 become severe. Therefore, like the antenna 21 of the above-described embodiment, the core end portions 211 </ b> B are formed along the inner peripheral surface of the casing 91 so that the planar shape is formed in an arc shape that is substantially concentric with the inner periphery of the casing 91. This is preferable because the space between the antenna 21 and the side magnetic member 95 can be set small, and the degree of freedom in arrangement of each component in the module 94 is increased.

Further, as shown in FIG. 16, when the core both end portions 211B are formed in a plane linear shape, the distance from the end surface 211E to the casing 91 in the normal direction of the end surface 211E of the core both end portions 211B is smaller than that in the above embodiment. Become.
Here, when the antenna 21 receives a radio wave, the radio wave enters from the end face 211E and passes through the coil 212. However, if the distance from the end face 211E to the casing 91 is small, the casing 91 inhibits reception of the radio wave and There is a concern that reception sensitivity will deteriorate.
Accordingly, as shown in FIG. 16, the core end portions 211 </ b> B have a planar shape that is the same as that of the inner periphery of the casing 91, as in the antenna 21 of the embodiment, rather than the core end portions 211 </ b> B being formed in a plane linear shape. The distance between the end surface 211E and the casing 91 in the normal direction of the end surfaces 211E of the core end portions 211B is set larger when the arcs are formed in a substantially concentric arc shape and are arranged along the inner peripheral surface of the casing 91, The casing 91 can be prevented from obstructing the reception of radio waves, and the reception sensitivity of the antenna can be improved.

Further, if the side magnetic member 95 is disposed on the side surface of the module 94 in the normal direction of the end surface 211E of the core both end portions 211B, the side magnetic member 95 inhibits reception of radio waves, and the reception sensitivity of the antenna deteriorates. There is a worry to do.
Therefore, as shown in FIG. 16, the core end portions 211B are substantially concentric with the inner periphery of the casing 91 in a planar shape as in the above-described embodiment, rather than the core end portions 211B being formed in a plane linear shape. Formed on the inner peripheral surface of the casing 91, the position where the normal line of the end surface 211 </ b> E of the core both ends 211 </ b> B intersects with the end of the side magnetic member 95 on the side surface of the module 94. The interval increases. Therefore, the side magnetic member 95 can be prevented from obstructing reception of radio waves, and the reception sensitivity of the antenna can be improved.

Moreover, in the said embodiment, the casing 91 was ring shape and the module 94 was formed in planar circle shape. However, in this invention, as shown in FIG. 17, even if the casing 91A is formed in planar angle shape, Good. A planar rectangular module 94C is housed in the casing 91A, and the antenna 21 is disposed along the inner side surface of one of the casings 91A in the module 94C. A side magnetic member 95B is arranged on the side arrangement portion 942 of the module 94C so as to be positioned between the antenna 21 and the casing 91 closest to the antenna 21.
The position in the axial direction of the coil 212 at one end of the side magnetic member 95B is the tip position of one core end 211B, which is one end of the magnetic core 211 along the axial direction of the coil 212. The position in the axial direction of the coil 212 at the other end of the magnetic member 95B is the tip position of the other core end 211B, which is the other end of the magnetic core 211. (Range A3 in FIG. 17).
Here, the arrangement range of the side magnetic member 95B is such that the position of the coil 212 in the axial direction at one end of the side magnetic member 95B starts from the position of one end of the coil 212 along the axial direction of the coil 212. The position in the axial direction of the coil 212 at the other end of the side magnetic member 95B is magnetic from the position of the other end of the coil 212 along the axial direction of the coil 212. It may be between the position of the other end part of the body core 211. That is, the side magnetic member 95B may be arranged in a range larger than the range A4 and smaller than the range A3.

  In the embodiment, the bottom magnetic member 96 is disposed so as to cover a range smaller than the range from one end to the other end of the magnetic core 211. However, in the present invention, the bottom magnetic member 96 is a magnetic body. You may arrange | position so that the range wider than the range from the one end of the core 211 to the other end may be covered. That is, when the bottom magnetic member 96 does not interfere with reception of radio waves (when radio waves enter the antenna 21 in the outer case 9 from the cover glass 92 side), the bottom magnetic member 96 is attached to the bottom arrangement portion 944 of the module 94. By sticking, the antenna characteristic degradation of the antenna 21 can be suppressed. Since the magnetic flux lines for resonance are mainly formed from the antenna 21 to the back cover 93 side, the bottom arrangement portion 944 between the metal back cover 93 and the antenna 21 is as much as possible of the bottom magnetic member 96. It is better to be covered with.

  In the present invention, the position of each end of the side magnetic member 95 is about −10% to + 10% of the circumferential length of the side magnetic member 95 with respect to the upper and lower limits of each specified range. The deviation is acceptable. Furthermore, a deviation of about −5 to + 5% is more preferable.

Further, the present invention is not limited to the analog radio wave correction timepiece 1 and may be applied to a digital radio wave correction timepiece 1A. As shown in FIG. 18, the digital radio-controlled timepiece 1 </ b> A includes an antenna 21, a receiving circuit unit 23, a time data storage circuit unit 24, a drive control circuit unit 3, a pulse synthesis circuit 31, and a battery 73 that is a power supply unit 7. And an external input device 8 such as crown. Further, a time counter 630 is provided in the drive control circuit unit 3, and the time data of the time counter 630 is configured to be displayed on the liquid crystal panel 430 as time display means via the drive circuit 43 of the liquid crystal panel. Yes.
Note that the value of the time counter 630 changes according to the pulse signal from the pulse synthesizing circuit 31, and when the time data received by the receiving circuit unit 23 and stored in the time data storage circuit unit 24 is determined to be correct. The time data is updated.
Here, in the case of the digital radio-controlled timepiece 1A, the antenna 21, the receiving circuit unit 23, the time data storage circuit unit 24, the drive control circuit unit 3, the pulse synthesis circuit 31, the battery 73, the liquid crystal panel 430, and the like are made of synthetic resin. A module that is integrally disposed in the made housing is housed in an exterior case.

  Also in such a digital radio wave correction watch 1A, side protrusions and side placement portions are formed on the side of the module, bottom protrusions and bottom placement portions are formed on the bottom surface of the module, The partial magnetic member and the bottom magnetic member may be attached. If it does so, the fall of an antenna characteristic can be suppressed like the said embodiment. Further, in the case of a digital timepiece, it can be constituted by a liquid crystal panel 430, a circuit board, a battery 73, etc., and has a smaller number of parts than an analog timepiece.

In addition, the best configuration, method and the like for carrying out the present invention have been disclosed above, but the present invention is not limited to this. That is, the invention has been illustrated and described with particular reference to certain specific embodiments, but without departing from the spirit and scope of the invention, Various modifications can be made by those skilled in the art in terms of material, quantity, and other detailed configurations.
Therefore, the description limited to the shape, material, etc. disclosed above is an example for easy understanding of the present invention, and does not limit the present invention. The description by the name of the member which remove | excluded the limitation of one part or all of such is included in this invention.

The front view of one Embodiment of this invention. The block diagram which shows the structure of the control system of one Embodiment. The block diagram which shows the structure of the receiving circuit part of embodiment same as the above. Sectional drawing seen from the front which shows the structure of embodiment same as the above. Sectional drawing seen from the side which shows the structure of embodiment same as the above. Sectional drawing seen from the front which shows the antenna periphery of embodiment same as the above. The conceptual diagram seen from the side surface which demonstrates reception of the electromagnetic wave by an antenna. Sectional drawing seen from the front which shows the modification of the module which concerns on this invention. Sectional drawing seen from the side which shows a modification same as the above. Sectional drawing seen from the front which shows the other modification of the module which concerns on this invention. Sectional drawing seen from the side which shows a modification same as the above. Sectional drawing seen from the front which shows the modification of the side part magnetic member which concerns on this invention. Sectional drawing seen from the front which shows the modification of the antenna which concerns on this invention. Sectional drawing seen from the front which shows the other modification of the antenna which concerns on this invention. Sectional drawing seen from the front which shows the other modification of the antenna which concerns on this invention. Sectional drawing seen from the front which shows the other modification of the antenna which concerns on this invention. Sectional drawing seen from the front which shows the modification which concerns on this invention. The block diagram which shows the structure of the digital timepiece which is the other modification of this invention. The conceptual diagram explaining reception of the electromagnetic wave by an antenna. The conceptual diagram explaining the reception of the electromagnetic wave by the antenna which has a magnetic member with respect to FIG.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1,1A ... Radio wave correction timepiece (electronic timepiece with built-in antenna), 2 ... Receiving means, 9 ... Exterior case, 21 ... Antenna, 91 ... Casing (trunk), 93 ... Back cover, 94 ... Module, 95 ... Side magnetism 96, bottom magnetic member, 211 ... magnetic core, 211A ... core central part, 211B ... core both ends, 211C, 211D ... inclined surface, 212 ... coil, 941 ... side protrusion, 942 ... side arrangement part , 943... Bottom protrusion, 944.

Claims (4)

An exterior case having a trunk and a back cover, an antenna for receiving external wireless information, a receiving means for processing external wireless information received by the antenna, and the antenna and the receiving means are disposed inside and stored in the exterior case Module,
The barrel is at least partially made of metal,
On the side of the module facing the cylinder, there are formed a side protrusion that contacts the cylinder and a side arrangement part that is provided away from the cylinder by the protruding dimension of the side protrusion,
In the side arrangement portion, a side magnetic member having a higher magnetic permeability and lower conductivity than the cylinder is arranged so as to be positioned between the antenna and the cylinder closest to the antenna.
The thickness dimension of the side magnetic member in the protruding direction of the side protruding portion is set smaller than the dimension of the protruding direction of the side protruding portion ,
The antenna includes a magnetic core and a coil wound around the magnetic core,
The magnetic core is composed of a core central part around which the coil is wound and core both ends extending at both ends of the core central part.
The magnetic core is formed linearly along the axial direction of the coil,
The position of the coil in the axial direction at one end of the side magnetic member is between the position of one end of the coil along the axial direction of the coil and the position of one end of the magnetic core.
The axial position of the coil at the other end of the side magnetic member is between the position of the other end of the coil along the axial direction of the coil and the position of the other end of the magnetic core.
In the part continuous to the core central part at both ends of the core, the side face facing the trunk side is provided with an inclined surface,
Each inclined surface is inclined in a direction facing each other inclined surface with respect to the axial direction of the coil . An exterior case having a trunk and a back cover, an antenna for receiving external wireless information, a receiving means for processing external wireless information received by the antenna, and the antenna and the receiving means are disposed inside and stored in the exterior case Module,
The barrel is at least partially made of metal,
On the side of the module facing the cylinder, there are formed a side protrusion that contacts the cylinder and a side arrangement part that is provided away from the cylinder by the protruding dimension of the side protrusion,
In the side arrangement portion, a side magnetic member having a higher magnetic permeability and lower conductivity than the cylinder is arranged so as to be positioned between the antenna and the cylinder closest to the antenna.
The thickness dimension of the side magnetic member in the protruding direction of the side protruding portion is set smaller than the dimension of the protruding direction of the side protruding portion,
The planar shape of the inner peripheral surface of the trunk is formed in a circular shape,
The antenna includes a magnetic core and a coil wound around the magnetic core,
The magnetic core is composed of a core central part around which the coil is wound and core both ends extending at both ends of the core central part.
The core both ends are formed in a planar arc shape along the inner peripheral surface of the trunk,
The position of the side magnetic member at one end is closer to one end of the magnetic core than the position of the one end of the coil, and one end of the magnetic core from the center of the circle drawn by the inner peripheral surface of the body The straight line extending toward the part is on the coil side rather than the position where the side of the module intersects,
The position of the side magnetic member at the other end is closer to the other end of the magnetic core than the position of the other end of the coil, and the magnetic body from the center of the circle drawn by the inner peripheral surface of the body The straight line extending toward the other end of the core is on the coil side from the position where it intersects the module side surface ,
In the part continuous to the core central part at both ends of the core, the side face facing the trunk side is provided with an inclined surface,
Each inclined surface is inclined in a direction facing each other inclined surface with respect to the axial direction of the coil . In the electronic timepiece with a built-in antenna according to claim 1 or 2,
The antenna includes a magnetic core and a coil wound around the magnetic core,
The magnetic core is composed of a core central part around which the coil is wound and core both ends extending at both ends of the core central part.
The position in the thickness direction of the module at the upper end portion of the side magnetic member is above the upper end portion of the magnetic core in the thickness direction of the module,
The position in the thickness direction of the module at the lower end portion of the side magnetic member is set lower than the lower end portion of the magnetic core in the thickness direction of the module. In the electronic timepiece with a built-in antenna according to any one of claims 1 to 3,
An electronic timepiece with a built-in antenna, characterized in that a dimension between one end of the core at both ends of the core and a case is set larger than a dimension between the other end of the both ends of the core and a case.

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