JP2009008633A - Magneto-concentrated sheet mounting structure and radio wave wrist watch - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a magneto-concentrated sheet mounting structure capable of satisfying both for miniaturization of antenna and enhancement of receiver sensitivity, and a radio wave wrist watch. <P>SOLUTION: A pair of magneto-concentrated sheets 30, 30 converging the magnetic flux of external radio waves is deployed on the upper part of a housing 3 an antenna structure 15 equipped with core 17 is incorporated, the magneto-concentrated sheets pair 30, 30 and the both ends 17b, 17b of a core 17 are connected magnetically, the magnetic flux converged to the magneto-concentrated sheets pair 30, 30 is derived to a coil 18 via the both ends 17b, 17b of the core 17, and finally induced electromotive force is generated efficiently with the coil 18. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a magnetic flux collecting sheet mounting structure and a radio wave wristwatch.

  2. Description of the Related Art Conventionally, an electronic device such as a radio timepiece that receives a standard radio wave including time information and automatically corrects the current time is known. As an antenna for receiving a standard radio wave in a radio timepiece, an antenna structure in which a coil is wound around a core made of amorphous metal, ferrite, or the like, which is a magnetic material having a high reception sensitivity, is often used.

In order to receive standard radio waves accurately, it is desirable to use an antenna structure with high reception sensitivity. Conventionally, in order to increase the reception sensitivity of radio waves transmitted from the outside, the reception area at both ends of the core is increased. However, an antenna device has been developed in which a larger amount of magnetic flux is guided to the core and a large electromotive force is generated by a coil wound around the core (for example, see Patent Document 1).
JP 55-91237 A

  However, in particular, in the case of a small radio timepiece such as a wrist watch type radio timepiece for women, it is necessary to store various parts in a limited small internal volume, and therefore it is necessary to make the size and thickness as small as possible. is there. For this reason, there is a problem that it is difficult to ensure a sufficient reception area at both ends of the core by increasing the antenna length.

  Accordingly, the present invention has been made to solve the above-described problems, and an object thereof is to provide a magnetic current collecting sheet mounting structure and a radio wave wristwatch that can achieve both a reduction in size of an antenna and an improvement in reception sensitivity. Yes.

In order to solve such a problem, the invention described in claim 1
A housing;
An antenna structure disposed inside the housing and including a core;
A pair of magnetic flux collecting sheets disposed on the upper part of the housing,
The pair of magnetic flux collecting sheets and the both ends of the core are magnetically coupled.

The invention according to claim 2 is the magnetic flux collecting sheet mounting structure according to claim 1,
A bent portion that bends toward both ends of the core is provided at the ends of the pair of magnetic flux collecting sheets,
The bent portion is in contact with both end portions of the core, whereby the pair of magnetic flux collecting sheets and the both end portions of the core are magnetically coupled.

A third aspect of the present invention is the magnetic flux collecting sheet mounting structure according to the first aspect,
Providing extending portions extending toward the magnetic flux collecting sheet at both ends of the core,
The pair of magnetic flux collecting sheets are characterized in that they are magnetically coupled to both end portions of the core by contacting the extending portions.

The invention according to claim 4
A housing;
An antenna structure disposed inside the housing and including a core;
A pair of magnetic flux collecting sheets disposed on an upper portion of the housing;
A connection means for connecting the pair of magnetic flux collecting sheets and the antenna structure;
The connecting means is characterized in that the pair of magnetic flux collecting sheets and both ends of the core are magnetically coupled.

The invention according to claim 5 is the magnetic flux collecting sheet mounting structure according to claim 4,
The connecting means is an elastic member that presses the magnetic flux collecting sheet toward an end of the core.

The invention according to claim 6 is the magnetic flux collecting sheet mounting structure according to claim 4,
The connecting means is a thick portion that is provided at an end of the core and protrudes up to a position where it contacts the magnetic collecting sheet.

The invention according to claim 7 is the magnetic flux collecting sheet mounting structure according to claim 4,
The connecting means is a coil spring disposed between the core and the magnetic flux collecting sheet and having one end in contact with the core and the other end in contact with the magnetic flux collecting sheet.

The invention according to claim 8 is the magnetic flux collecting sheet mounting structure according to claim 4,
The connecting means is a magnetic member that is disposed between the core and the magnetic flux collecting sheet and has elasticity that has one end in contact with the core and the other end in contact with the magnetic flux collecting sheet. .

The invention according to claim 9 is the magnetic flux collecting sheet mounting structure according to claim 4,
The connection means is formed in a part of the housing, and includes a sheet guide portion that forms a sheet insertion portion with the core.
The sheet guide portion is configured to abut the magnetic flux collecting sheet against the core when the magnetic flux collecting sheet is inserted into the sheet guide portion.

The invention according to claim 10 is the magnetic flux collecting sheet mounting structure according to claim 4,
A recess for sandwiching the magnetic flux collecting sheet in a part of the core is provided,
The connection means is the recess.

The invention according to claim 11 is the magnetic flux collecting sheet mounting structure according to claim 4,
The connecting means is an adhesive member that is disposed between the core and the magnetic flux collecting sheet and adheres the core and the magnetic flux collecting sheet.

The invention according to claim 12
Magnetic flux collecting sheet mounting structure according to any one of claims 1 to 11,
A clock module;
It is characterized by having.

The invention according to claim 13 is the radio-controlled wristwatch according to claim 12,
On the upper part of the housing, a gear press plate for pressing the gears constituting the timepiece module is arranged,
The pair of magnetic flux collecting sheets is characterized in that the thickness is smaller than that of the gear presser plate.

  According to the present invention, since the antenna length of the antenna structure can be extended by the amount of the magnetic collecting sheet, the core itself cannot be enlarged as in the case where the antenna structure has to be stored in a narrow space. However, it is possible to efficiently capture radio waves and achieve an effect that the reception sensitivity can be improved while the module size is reduced.

  Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings. In the following, a case where the magnetic flux collecting sheet mounting structure according to the present invention is applied to a wristwatch-type radio timepiece will be described, but embodiments to which the present invention can be applied are not limited thereto.

[First Embodiment]
First, a first embodiment of a magnetic flux collecting sheet mounting structure according to the present invention and a radio-controlled wristwatch including the same will be described with reference to FIGS.

  FIG. 1 is a front view of a radio-controlled wristwatch 100 according to this embodiment. The radio wave wristwatch 100 includes an antenna structure 15 (see FIGS. 2 to 4) that receives a standard radio wave. The current time is obtained by amplifying and modulating the standard radio wave received by the antenna structure 15 and decoding a time code. This is a radio watch to be corrected.

  The radio-controlled wristwatch 100 according to the first embodiment includes a module housing (see FIGS. 2 to 4, hereinafter simply referred to as “housing”) 3 that houses components constituting a watch module (not shown) and a housing 3. A watch case 2 housed therein is provided.

The watch case 2 is made of a strong metal such as stainless steel or titanium, and is formed in an approximately annular shape in plan view opened on the upper and lower surfaces. A watch glass 4 is mounted on the viewing side of the watch case 2 so as to close the opening on the viewing side. A back cover (not shown) is attached to the back side (side facing the viewing side) so as to close the opening on the back side.
Further, a watch band 5 for attaching the radio-controlled wristwatch 100 to the user's arm is provided at both upper and lower ends of the watch case 2 in FIG. Is attached. In addition, a plurality of operation buttons f1 for inputting various operation instructions such as a time setting instruction are provided on the outer periphery of the watch case 2.

2 is a cross-sectional view taken along the line II-II of FIG. 1 with the watch glass 4, the back cover, and the watch case 2 removed.
The housing 3 accommodated in the watch case 2 is formed of, for example, resin, and the housing 3 has a hand movement mechanism (not shown) for moving a pointer 6 such as an hour hand or a second hand on the dial 7. A timepiece module (not shown) made up of various electronic components and the like for operating the device is housed.

  Between the housing 3 and the watch glass 4, a dial plate 7 formed in a substantially circular thin plate shape is arranged. The peripheral portion of the surface of the dial 7 (viewing side: upper side in FIG. 2) is a time character portion 8, and the time character portion 8 includes 12 time characters 9 at approximately equal intervals in the circumferential direction. Are provided by engraving or printing.

  As shown in FIG. 1, an opening 7a is formed at a position near 6 o'clock of the dial 7, and a liquid crystal panel 10 for displaying time and the like is disposed on the back side. Thereby, when the radio-controlled wristwatch 100 is viewed from the front, the time displayed on the liquid crystal panel 10 through the opening 7a of the dial 7 is visually recognized.

  Further, as shown in FIG. 2, a dial holding member 11 that presses the dial 7 toward the housing 3 and fixes the dial 7 is disposed on the peripheral portion of the dial 7. Further, between the dial plate 7 and the housing 3, a thin plate-like solar cell 12 having a size substantially the same as that of the dial plate 7 is disposed.

  A shaft hole 13 is formed in the central portion of the dial 7 and the solar cell 12, and a pointer shaft 14 provided in the hand movement mechanism of the timepiece module is provided in the shaft hole 13 on the back side of the dial 7 (see FIG. 2). It penetrates from the lower side toward the watch glass 4 (upper side in FIG. 2). A pointer 6 such as an hour hand or a minute hand is attached to the pointer shaft 14. The pointer 6 is moved above the dial plate 7 by the above-described hand movement mechanism. By indicating the time character 9 on the dial plate 7 by the pointer 6, the current time can be known. It is like that.

  A storage space 16 in which the antenna structure 15 is stored is formed inside the housing 3 and at a position that is arranged on the 12 o'clock side when the housing 3 is stored in the watch case 2.

The antenna structure 15 housed in the housing space 16 of the housing 3 includes a core 17 and a coil 18 wound around the core 17.
The core 17 is formed by laminating a plurality of plate-like members made of a magnetic material having a high relative permeability such as amorphous metal and a low electrical conductivity. As plate-like members, soft magnetic metal foil strips such as amorphous alloys, nanocrystalline magnetic alloys such as Fe-Cu-Nb-Si-B, Fe-Si based magnetic alloys, etc., are used with a thickness of 20 μm or less. However, it is not limited to this.
As shown in FIGS. 3 and 4, the substantially central portion of the core 17 is a narrow straight portion 17 a that is a coil winding portion around which the coil 18 is wound, and both end portions 17 b of the core 17 are As compared with the straight portion 17a, the core 17 is formed in a shape extending greatly in the width direction. Each end portion 17 b is formed such that one end edge is formed along the inner peripheral surface of the watch case 2. When the antenna structure 15 is housed in the watch case 2, the antenna structure 15 is placed in the watch case 2. Is arranged along the inner peripheral surface of the watch body so that an unnecessary gap is not generated between the watch case 2 and the antenna structure 15.

Inside the watch case 2 and below the housing 3 (on the lower side in FIG. 2), a circuit board 20 on which an IC chip having various circuits is mounted and electronic components constituting the watch module are connected. ing. The circuit board 20 is fixed to the housing 3 by a circuit pressing plate 21.
The end of the coil 18 of the antenna structure 15 is connected to the connection terminal 22 of the circuit board 20.

  As the circuit elements of the IC chip, for example, a control IC such as a CPU for controlling each part of the wristwatch 100, an electric signal detected by an antenna structure 15 described later, and time data included in the standard radio wave are amplified and demodulated. There are a receiving circuit section to be taken out, a clock circuit that has an oscillator and clocks the current time (none of which are shown).

  The configuration of the housing 3 in this embodiment will be described in detail with reference to FIGS. Here, FIG. 3 is a plan view of the upper portion of the housing 3 when the dial 7 and the solar cell 12 are removed, and FIG. 4 is a perspective view showing the main configuration of the housing 3. .

  As shown in FIGS. 2 to 4, a plurality of gears 24 constituting a hand movement mechanism are provided at substantially the center of the upper portion of the housing 3, and the gears 24 are fixed by a plate-like gear presser plate 25. Yes.

  On the upper part of the housing 3, a pair of magnetic flux collecting sheets 30 are disposed at substantially symmetrical positions with the gear presser plate 25 interposed therebetween. As shown in FIG. 2, the magnetic flux collecting sheet 30 is fixed to the upper part of the housing 3 with an adhesive 26. This adhesive 26 is preferably elastic.

In the present embodiment, the magnetic flux collecting sheet 30 is formed by laminating a plurality of amorphous sheets, and the thickness thereof is the same as or thinner than the thickness of the gear presser plate 25. For example, when the thickness of the gear pressing plate 25 is about 0.15 mm, the magnetic flux collecting sheet 30 is formed by laminating about three amorphous sheets having a thickness of 30 μm. Thus, by making the thickness of the magnetic flux collecting sheet 30 the same as or thinner than the thickness of the gear presser plate 25, the range of steps existing from the top of the housing 3 even if the magnetic flux collecting sheet 30 is provided. The thickness of the housing 3 due to the provision of the magnetic flux collecting sheet 30 does not occur.
The magnetic flux collecting sheet 30 has a shape that gradually increases in width from one end to the other end, and the end on the wide side has a shape that follows the outer periphery of the housing 3.

  Further, as shown in FIG. 3 and FIG. 4, the magnetic flux collecting sheet 30 is located at the upper portion of the housing 3 and at positions corresponding to both ends 17 b of the core 17 of the antenna structure 15 housed in the housing space 16. An insertion hole 27 for inserting the narrow end portion 30a is formed. The end 30 a of the magnetic flux collecting sheet 30 is inserted into the housing 3 through the insertion hole 27.

  In addition, the material which forms the magnetic flux collecting sheet 30 should just be a magnetic material, and is not limited to an amorphous sheet. For example, it may be integrally formed of a magnetic material such as ferrite. Further, the size, thickness, shape, and the like of the magnetic flux collecting sheet 30 and the gear presser plate 25 are not limited to those exemplified here.

  The antenna structure 15 is fixed in the storage space 16 of the housing 3 via an elastic adhesive 28. In addition, it is not an essential component that the antenna structure 15 is fixed in the storage space 16 via the adhesive 28 having elasticity, but the antenna structure 15 is simply fixed by being pressed by another member from below. It may be.

  FIG. 5 is an enlarged cross-sectional view of a connection portion between the core 17 and the end 30 a of the magnetic flux collecting sheet 30. As shown in FIGS. 3 and 5, in this embodiment, the elastic member 31 that presses the end 30 a of the magnetic flux collecting sheet 30 toward the end of the core 17 is formed in the insertion hole 27 from the top to the bottom. It is supposed to be inserted. In the present embodiment, the elastic member 31 is a connection unit that magnetically couples the pair of magnetic flux collecting sheets 30 and both end portions 17 a of the core 17.

  Next, the operation of this embodiment will be described.

  The antenna structure 15 is housed in the housing space 16 of the housing 3, and the end of the coil 18 is connected to the connection terminal 22 of the circuit board 20. As a result, the receiving circuit unit on the circuit board 20 and the antenna structure 15 are connected. Further, a pair of magnetic flux collecting sheets 30 is arranged on the upper portion of the housing 3, and the end portions 30 a of the magnetic flux collecting sheets 30 are inserted into insertion holes 27 provided on the upper portion of the housing 3, and then elastically inserted into the insertion holes 27. The member 31 is inserted and the end portion 30a of the magnetic flux collecting sheet 30 is pressed downward. As a result, the end 30a of the magnetic flux collecting sheet 30 contacts the end 17b of the core 17 of the antenna structure 15, and both are magnetically coupled. When the standard radio wave is received by the magnetic flux collecting sheet 30 and the core 17, the received radio wave is sent to the receiving circuit unit on the circuit board 20 via the connection terminal 22, and time information is acquired based on the radio wave. The current time data of the radio wristwatch 100 is corrected.

  As described above, according to the present embodiment, by pressing the magnetic flux collecting sheet 30 disposed on the upper portion of the housing 3 with the elastic member 31, the core 17 of the antenna structure 15 disposed inside the housing 3 and It is made to contact and be magnetically coupled. Thereby, since the antenna length of the antenna structure 15 can be extended by the amount of the magnetic flux collecting sheet 30, the core 17 cannot be enlarged as in the case where the antenna structure 15 has to be stored in a narrow space. However, it is possible to efficiently capture radio waves and improve the receiving sensitivity while realizing a reduction in module size.

  Further, since the magnetic collecting sheet 30 is pressed and brought into contact with the core 17 by the elastic member 31 as the connecting means, the magnetic collecting sheet 30 and the core 17 can be reliably connected.

  Further, in the present embodiment, a gear presser plate 25 is disposed on the upper portion of the housing 3, and the gear presser plate 25 originally causes a step on the upper portion of the housing 3. Since the thickness of the gear presser plate 25 is smaller than that of the gear presser plate 25, the magnetic flux collecting sheet 30 can be arranged within the range of the step generated by the gear presser plate 25. For this reason, even if the magnetic flux collecting sheet 30 is arranged, the thickness of the housing 3 is not newly increased, and the receiving sensitivity can be improved while the module size is reduced.

  Needless to say, the present invention is not limited to the above-described embodiment, and can be modified as appropriate.

[Second Embodiment]
Next, a magnetic flux collecting sheet mounting structure according to the present invention and a second embodiment of a radio wave wristwatch including the same will be described with reference to FIG. The second embodiment is different from the first embodiment only in the coupling structure between the core of the antenna structure and the magnetic flux collecting sheet. Therefore, in the following, especially the parts different from the first embodiment. explain.

  In the present embodiment, the radio-controlled wristwatch (not shown) includes a watch case (not shown) and a housing 40 (see FIG. 6) as in the first embodiment. FIG. 6 is a cross-sectional view showing a connection portion between the end portion of the core 41 of the antenna structure (not shown) and the end portion 42 a of the magnetic flux collecting sheet 42 by enlarging a part of the housing 40.

  A through hole 43 is formed in the upper part of the housing 40 and corresponding to both ends of the core 41. As in the first embodiment, a pair of magnetic flux collecting sheets 42 is disposed on the upper portion of the housing 40, and one end portion 42 a of each magnetic flux collecting sheet 42 is located above the through hole 43 of the housing 40. It is like that. In the present embodiment, a magnetic member 45 disposed between the core 41 and the magnetic flux collecting sheet 42 and having one end in contact with the end of the core 41 is disposed inside the through hole 43. The magnetic member 45 is made of a magnetic material such as amorphous metal or ferrite and has a height dimension lower than the height of the through hole 43 (that is, the thickness of the upper portion of the housing 40). In the present embodiment, the elastic member 46 that presses the end 42 a of the magnetic flux collecting sheet 42 toward the magnetic member 45 is inserted into the through hole 43 from the upper side to the lower side. In the present embodiment, the elastic member 46 and the magnetic member 45 are connecting means for magnetically coupling the pair of magnetic flux collecting sheets 42 and both ends of the core 41.

  In addition, since the other structure is the same as that of what was demonstrated in 1st Embodiment, the same code | symbol is attached | subjected to the same member and the description is abbreviate | omitted.

  Next, the operation of this embodiment will be described.

  The antenna structure is stored in a predetermined storage space (not shown) in the housing 40. A magnetic member 45 is disposed inside the through hole 43. Then, a pair of magnetic flux collecting sheets 42 is disposed on the upper portion of the housing 40, and end portions 42 a of the magnetic flux collecting sheets 42 are inserted into the housing 40 through the through holes 43. Further, the elastic member 46 is inserted into the through hole 43 from the upper side to the lower side, and the magnetic flux collecting sheet 42 is pressed against the magnetic member 45. As a result, the end 42a of the magnetic flux collecting sheet 42 and the core 41 of the antenna structure are brought into contact with each other via the elastic member 46 and the magnetic member 45, and both are magnetically coupled. When a standard radio wave is received by the magnetic collecting sheet 42 and the core 41, time information is acquired based on the radio wave, and the current time data of the radio wristwatch is corrected.

  As described above, according to the present embodiment, the magnetic flux collecting sheet 42 disposed on the upper portion of the housing 40 is disposed on the core 41 of the antenna structure disposed inside the housing 40 via the elastic member 46 and the magnetic member 45. It comes into contact with the end and is magnetically coupled. Thereby, since the antenna length of the antenna structure can be extended by the amount of the magnetic collecting sheet 42, even when the core 41 cannot be enlarged as in the case where the antenna structure must be stored in a narrow space, Radio waves can be captured efficiently, and the reception sensitivity can be improved while realizing a reduction in module size.

  In addition, since the magnetic collecting sheet 42 is pressed against the magnetic member 45 by the elastic member 46 as a connecting means and brought into contact with the core 41, the magnetic collecting sheet 42 and the core 41 can be reliably connected.

  Furthermore, the reception sensitivity can be further improved by sandwiching the magnetic member 45 between the magnetic flux collecting sheet 42 and the core 41.

  In addition, it is the same as that of 1st Embodiment that this invention is not limited to the range of embodiment.

[Third Embodiment]
Next, referring to FIG. 7, a magnetic flux collecting sheet mounting structure according to the present invention and a radio-controlled wristwatch including the same will be described. Note that the third embodiment is different from the first embodiment and the second embodiment only in the coupling structure of the core of the antenna structure and the magnetic flux collecting sheet. A different part from embodiment and 2nd Embodiment is demonstrated.

  In this embodiment, the radio-controlled wristwatch (not shown) includes a watch case (not shown) and a housing 47 (see FIG. 7), as in the first and second embodiments. FIG. 7 is a cross-sectional view showing a connection portion between the end portion of the core 48 of the antenna structure (not shown) and the end portion 49 a of the magnetic flux collecting sheet 49 by enlarging a part of the housing 47.

  In the present embodiment, the end portion of the core 48 is a thick portion 48a formed thicker than other portions. The method for forming the thick part 48a is not particularly limited. For example, as in the first embodiment, when the core 48 is formed by laminating thin plate members such as amorphous metal, the number of plate members laminated only at the end of the core 48 is increased. The thick part 48a may be formed. For example, when the core 48 is integrally formed of ferrite or the like, it is molded so as to have a thick portion 48a. Alternatively, the thick portion may be formed separately and then coupled to the end of the core 48.

  An insertion hole 50 for inserting the thick part 48a is formed in the upper part of the housing 47 and corresponding to the thick part 48a of the core 48. As in the first and second embodiments, a pair of magnetic flux collecting sheets 49 is arranged on the upper portion of the housing 47, and one end portion 49 a of each magnetic flux collecting sheet 49 is an insertion hole of the housing 40. It is located on 50. In the present embodiment, the thick portion 48 a is raised to a position where it contacts the magnetic flux collecting sheet 49 located above the insertion hole 50, and the core 48 and the end portion 49 a of the magnetic flux collecting sheet 49 are brought into contact with each other. It functions as a connection means to be coupled to.

  In addition, since the other structure is the same as that of what was demonstrated in 1st Embodiment and 2nd Embodiment, the same code | symbol is attached | subjected to the same member and the description is abbreviate | omitted.

  Next, the operation of this embodiment will be described.

  The antenna structure is stored in a predetermined storage space (not shown) in the housing 47. At this time, the thick part 48 a at the end of the core 48 is inserted into the insertion hole 50 provided in the upper part of the housing 47. In addition, the pair of magnetic flux collecting sheets 49 is disposed on the upper portion of the housing 47 so that the end portion 49 a is positioned above the insertion hole 50. As a result, the end portions 49a of the magnetic flux collecting sheets 49 come into contact with the thick portion 48a formed at the end portion of the core 48 of the antenna structure, and both are magnetically coupled. When a standard radio wave is received by the magnetic collecting sheet 49 and the core 48, time information is acquired based on the radio wave, and current time data of the radio wristwatch is corrected.

  As described above, according to the present embodiment, the magnetic flux collecting sheet 49 disposed on the upper portion of the housing 47 is brought into contact with the end of the core 48 of the antenna structure disposed inside the housing 47 to magnetically. It is supposed to be combined. As a result, the antenna length of the antenna structure can be extended by the amount of the magnetic flux collecting sheet 49, so that even when the core 48 cannot be enlarged as in the case where the antenna structure must be stored in a narrow space, Radio waves can be captured efficiently, and the reception sensitivity can be improved while realizing a reduction in module size.

  Further, the thick part 48a formed at the end of the core 48 functions as a connecting means, and the thick part 48a and the end 49a of the magnetic flux collecting sheet 49 are brought into contact with each other, whereby the core 48 and the magnetic flux collecting sheet 49 are contacted. Are magnetically coupled, so that the receiving sensitivity can be improved without increasing the number of components.

  In the present embodiment, the case where the thick portion 48a is raised to the position where it contacts the magnetic collecting sheet 49 is taken as an example. However, as in the magnetic member shown in the second embodiment, for example, A thick portion 48a having a thickness that does not contact the sheet 49 is formed in the core 48, and the end portion 49a of the magnetic flux collecting sheet 49 is inserted into the insertion hole 50, and further pressed from above by an elastic member or the like. Good. In this case, the connection member is constituted by the thick portion 48a and the elastic member.

  Note that the present invention is not limited to the scope of the embodiment, similar to the first embodiment and the second embodiment.

[Fourth Embodiment]
Next, a magnetic flux collecting sheet mounting structure according to the present invention and a radio-controlled wristwatch including the same according to a fourth embodiment of the present invention will be described with reference to FIG. The fourth embodiment is different from the first embodiment to the third embodiment only in the coupling structure between the core of the antenna structure and the magnetic flux collecting sheet. Differences from the third embodiment to the third embodiment will be described.

  In the present embodiment, the radio-controlled wristwatch (not shown) includes a watch case (not shown) and a housing 52 (see FIG. 8) as in the first to third embodiments. FIG. 8 is a cross-sectional view showing a connection portion between the end portion of the core 53 of the antenna structure (not shown) and the end portion 54 a of the magnetic flux collecting sheet 54 by enlarging a part of the housing 52.

A through hole 55 is formed in the upper part of the housing 52 and corresponding to both ends of the core 53. As in the first to third embodiments, a pair of magnetic flux collecting sheets 54 is arranged on the upper portion of the housing 52, and one end portion 54 a of each magnetic flux collecting sheet 54 is a through hole of the housing 52. 55 is located above. In the present embodiment, the through hole 55 is disposed between the core 53 and the magnetic flux collecting sheet 54, one end thereof is in contact with the end of the core 53, and the other end is the end 54 a of the magnetic flux collecting sheet 54. The coil spring 56 which contacts is arranged. The coil spring 56 is a compression coil spring, and is in contact with the end portion 54a of each magnetic flux collecting sheet 54 at a position equal to or lower than the height of the upper surface of a gear retainer plate (not shown) disposed on the upper portion of the housing 52. It has become. The coil spring 56 is preferably a spring formed of a magnetic material.
The coil spring 56 functions as a connecting means for bringing the core 53 and the end portion 54a of the magnetic flux collecting sheet 54 into contact with each other and magnetically coupling them.

  In addition, since the other structure is the same as that of what was demonstrated in 1st Embodiment to 3rd Embodiment, the same code | symbol is attached | subjected to the same member and the description is abbreviate | omitted.

  Next, the operation of this embodiment will be described.

  The antenna structure is stored in a predetermined storage space (not shown) in the housing 52. A coil spring 56 is disposed inside the through hole 55. Then, the pair of magnetic flux collecting sheets 54 is disposed on the upper portion of the housing 52 so that the end portion 54a is positioned above the insertion hole. As a result, the end 54a of the magnetic flux collecting sheet 54 contacts one end of the coil spring 56, the other end of the coil spring 56 contacts the end of the core 53 of the antenna structure, and both are magnetically coupled. The When a standard radio wave is received by the magnetic collecting sheet 54 and the core 53, time information is acquired based on the radio wave, and current time data of the radio wristwatch is corrected.

  As described above, according to the present embodiment, the magnetic flux collecting sheet 54 disposed on the upper portion of the housing 52 is brought into contact with the end portion of the core 53 of the antenna structure disposed inside the housing 52 to magnetically. It is supposed to be combined. Thereby, since the antenna length of the antenna structure can be extended by the amount of the magnetic flux collecting sheet 54, even when the core 53 cannot be enlarged as in the case where the antenna structure must be stored in a narrow space, Radio waves can be captured efficiently, and the reception sensitivity can be improved while realizing a reduction in module size.

  Further, since the magnetic flux collecting sheet 54 and the core 53 are connected via the coil spring 56, a stable connection can be achieved with an easy configuration without deforming the magnetic flux collecting sheet 54.

  Note that the present invention is not limited to the scope of the embodiments, as in the first to third embodiments.

[Fifth Embodiment]
Next, a magnetic flux collecting sheet mounting structure according to the present invention and a fifth embodiment of a radio wave wristwatch including the same will be described with reference to FIG. The fifth embodiment is different from the first embodiment to the fourth embodiment only in the coupling structure between the core of the antenna structure and the magnetic flux collecting sheet. Differences from the embodiment to the fourth embodiment will be described.

  In the present embodiment, the radio-controlled wristwatch (not shown) includes a watch case (not shown) and a housing 58 (see FIG. 9) as in the first to fourth embodiments. FIG. 9 is a cross-sectional view showing a connection portion between the end portion of the core 59 of the antenna structure (not shown) and the end portion 60 a of the magnetic flux collecting sheet 60 by enlarging a part of the housing 58.

A through hole 61 is formed in the upper part of the housing 58 and corresponding to both ends of the core 59. As in the first to fourth embodiments, a pair of magnetic flux collecting sheets 60 is arranged on the upper portion of the housing 58, and one end portion 60 a of each magnetic flux collecting sheet 60 is a through hole of the housing 58. 61 is located above. In the present embodiment, the through hole 61 is disposed between the core 59 and the magnetic flux collecting sheet 60, one end thereof is in contact with the end of the core 59, and the other end is the end 60 a of the magnetic flux collecting sheet 60. The elastic member 62 which contacts with is arrange | positioned. The elastic member 62 is formed in a height dimension substantially equal to the height of the through hole 61 (that is, the thickness of the upper portion of the housing 58).
The elastic member 62 functions as connecting means for bringing the core 59 and the end portion 60a of the magnetic flux collecting sheet 60 into contact with each other and magnetically coupling them.

  In addition, since the other structure is the same as that of what was demonstrated in 1st Embodiment-4th Embodiment, the same code | symbol is attached | subjected to the same member and the description is abbreviate | omitted.

  Next, the operation of this embodiment will be described.

  The antenna structure is stored in a predetermined storage space (not shown) in the housing 58. Further, the elastic member 62 is disposed inside the through hole 61. Then, the pair of magnetic flux collecting sheets 60 is arranged on the upper portion of the housing 58 so that the end portion 60 a is positioned on the through hole 61. As a result, the end 60a of the magnetic flux collecting sheet 60 contacts one end of the elastic member 62, the other end of the elastic member 62 contacts the end of the core 59 of the antenna structure, and both are magnetically coupled. The When a standard radio wave is received by the magnetic collecting sheet 60 and the core 59, time information is acquired based on the radio wave, and the current time data of the radio wristwatch is corrected.

  As described above, according to the present embodiment, the magnetic flux collecting sheet 60 disposed on the upper portion of the housing 58 is brought into contact with the end portion of the core 59 of the antenna structure disposed inside the housing 58 to magnetically. It is supposed to be combined. Thereby, since the antenna length of the antenna structure can be extended by the amount of the magnetic flux collecting sheet 60, even when the core 59 cannot be enlarged as in the case where the antenna structure must be stored in a narrow space, Radio waves can be captured efficiently, and the reception sensitivity can be improved while realizing a reduction in module size.

  In addition, since the magnetic current collecting sheet 60 and the core 59 are connected via the elastic member 62, the magnetic current collecting sheet 60 can be contacted in a wide contact area with an easy configuration, so that the magnetic current collecting sheet 60 is more stable without being deformed. Connection is possible.

  Note that the present invention is not limited to the scope of the embodiment, similar to the first to fourth embodiments.

[Sixth Embodiment]
Next, with reference to FIG. 10, a magnetic flux collecting sheet mounting structure according to the present invention and a sixth embodiment of a radio wave wristwatch including the same will be described. The sixth embodiment is different from the first embodiment to the fifth embodiment only in the coupling structure of the antenna structure core and the magnetic flux collecting sheet. Differences from the fifth embodiment to the fifth embodiment will be described.

  In the present embodiment, the radio-controlled wristwatch (not shown) includes a watch case (not shown) and a housing 65 (see FIG. 10) as in the first to fifth embodiments. FIG. 10 is a cross-sectional view showing a connection portion between the end portion of the core 66 of the antenna structure (not shown) and the end portion 67 a of the magnetic flux collecting sheet 67 by enlarging a part of the housing 65.

Insertion holes 68 are formed in the upper part of the housing 65 and corresponding to both ends of the core 66. In the upper part of the housing 65, as in the first to fifth embodiments,
A pair of magnetic flux collecting sheets 67 is arranged, and one end 67 a of each magnetic flux collecting sheet 67 is inserted into the insertion hole 68 of the housing 65. In addition, a sheet insertion part 69 is formed between the core 65 and a part of the housing 65 in the vicinity of the insertion hole 68, and one end of the magnetic flux collecting sheet 67 inserted into the insertion hole 68. A sheet guide portion 65 a that guides 67 a to the sheet insertion portion 69 is provided. The sheet guide portion 65 a is integrally formed in the housing 65.
In the present embodiment, the connecting means includes the sheet guide portion 65a, and one end portion 67a of the magnetic flux collecting sheet 67 is guided by the sheet guide portion 65a and inserted into the sheet insertion portion 69, and the sheet guide portion When 65a regulates the lifting of the end portion 67a, the core 66 and the end portion 67a of the magnetic flux collecting sheet 67 come into contact with each other and are magnetically coupled.

  In addition, since the other structure is the same as that of what was demonstrated in 1st Embodiment to 5th Embodiment, the same code | symbol is attached | subjected to the same member and the description is abbreviate | omitted.

  Next, the operation of this embodiment will be described.

  The antenna structure is stored in a predetermined storage space (not shown) in the housing 65. Further, the end portion 67 a of the magnetic flux collecting sheet 67 is inserted into the insertion hole 68. The end portion 67a of the magnetic flux collecting sheet 67 inserted into the housing 65 from the insertion hole 68 is guided by the sheet guide portion 65a and inserted into the sheet insertion portion 69, and the end portion 67a of the magnetic flux collecting sheet 67 is inserted by the sheet guide portion 65a. Is restricted, the core 66 and the end portion 67a of the magnetic flux collecting sheet 67 come into contact with each other and are magnetically coupled. When a standard radio wave is received by the magnetic collecting sheet 67 and the core 66, time information is acquired based on the radio wave, and the current time data of the radio wristwatch is corrected.

  As described above, according to the present embodiment, the magnetic flux collecting sheet 67 disposed on the upper portion of the housing 58 is brought into contact with the end of the core 66 of the antenna structure disposed inside the housing 65 to magnetically. It is supposed to be combined. Thereby, since the antenna length of the antenna structure can be extended by the amount of the magnetic collecting sheet 67, even when the core 66 cannot be enlarged as in the case where the antenna structure must be stored in a narrow space, Radio waves can be captured efficiently, and the reception sensitivity can be improved while realizing a reduction in module size.

  In the present embodiment, since the sheet guiding portion 65a constituting the connecting means is integrally formed in the housing 65, the receiving sensitivity can be improved without increasing the number of parts.

  Note that the present invention is not limited to the scope of the embodiments, as in the first to fifth embodiments.

[Seventh Embodiment]
Next, referring to FIG. 11, a seventh embodiment of a magnetic flux collecting sheet mounting structure and a radio wave wristwatch including the same according to the present invention will be described. The seventh embodiment is different from the first embodiment to the sixth embodiment only in the coupling structure of the antenna structure core and the magnetic flux collecting sheet. Differences from the sixth embodiment to the sixth embodiment will be described.

  In the present embodiment, the radio-controlled wristwatch (not shown) includes a watch case (not shown) and a housing 71 (see FIG. 11) as in the first to sixth embodiments. FIG. 11 is a cross-sectional view showing a connection portion between an end portion of the core 72 of the antenna structure (not shown) and an end portion 73 a of the magnetic flux collecting sheet 73 by enlarging a part of the housing 71.

  Insertion holes 74 are formed in the upper part of the housing 71 and corresponding to both ends of the core 72. As in the first to sixth embodiments, a pair of magnetic flux collecting sheets 73 is arranged on the upper portion of the housing 71, and one end 73 a of each magnetic flux collecting sheet 73 is an insertion hole of the housing 71. 74 is inserted. In the present embodiment, a recess 75 that sandwiches the end 73 a of the magnetic flux collecting sheet 73 is provided in a part (one end) of the core 72. An end 73a of the magnetic flux collecting sheet 73 inserted into the housing 71 from the insertion hole 74 is sandwiched between the concave portions 75. In the present embodiment, the concave portion 75 is formed by the core 72 and the magnetic flux collecting sheet 73. It functions as a connection means for bringing the end portion 73a into contact with and magnetically coupling.

  In addition, since the other structure is the same as that of what was demonstrated in 6th Embodiment from 1st Embodiment, the same code | symbol is attached | subjected to the same member and the description is abbreviate | omitted.

  Next, the operation of this embodiment will be described.

  The antenna structure is stored in a predetermined storage space (not shown) in the housing 71. Further, the end 73 a of the magnetic flux collecting sheet 73 is inserted into the insertion hole 74. The end portion 73 a of the magnetic flux collecting sheet 73 inserted into the housing 71 from the insertion hole 74 is sandwiched between the concave portions 75 formed in a part of the core 72, thereby the end portion 73 a of the core 72 and the magnetic flux collecting sheet 73. And are magnetically coupled. When a standard radio wave is received by the magnetic collecting sheet 73 and the core 72, time information is acquired based on the radio wave, and the current time data of the radio wristwatch is corrected.

  As described above, according to the present embodiment, the magnetic flux collecting sheet 73 disposed on the upper portion of the housing 71 is brought into contact with the end portion of the core 72 of the antenna structure disposed inside the housing 71 to magnetically. It is supposed to be combined. Thereby, since the antenna length of the antenna structure can be extended by the amount of the magnetic flux collecting sheet 73, even when the core 72 cannot be enlarged as in the case where the antenna structure must be stored in a narrow space, Radio waves can be captured efficiently, and the reception sensitivity can be improved while realizing a reduction in module size.

  Further, in this embodiment, since the concave portion 75 formed in a part of the core 72 functions as a connection means, the magnetic flux collecting sheet 73 can be reliably brought into contact with the core 72, and reception sensitivity is increased without increasing the number of components. Can be improved.

  It should be noted that the present invention is not limited to the scope of the embodiment, as in the first to sixth embodiments.

[Eighth Embodiment]
Next, an eighth embodiment of a magnetic flux collecting sheet mounting structure and a radio wave wristwatch including the same according to the present invention will be described with reference to FIG. In the eighth embodiment, only the coupling structure between the core of the antenna structure and the magnetic flux collecting sheet is different from the first embodiment to the seventh embodiment. Differences from the seventh embodiment to the seventh embodiment will be described.

  In the present embodiment, the radio-controlled wristwatch (not shown) includes a watch case (not shown) and a housing 77 (see FIG. 12) as in the first to seventh embodiments. FIG. 12 is a cross-sectional view showing a connection portion between the end of the core 78 of the antenna structure (not shown) and the end 79 a of the magnetic flux collecting sheet 79 by enlarging a part of the housing 77.

  Insertion holes 80 are formed in the upper part of the housing 77 and corresponding to both ends of the core 78. As in the first to seventh embodiments, a pair of magnetic flux collecting sheets 79 is arranged on the upper portion of the housing 77, and one end 79 a of each magnetic flux collecting sheet 79 is an insertion hole of the housing 77. 80 to be inserted. In the present embodiment, an adhesive member 81 that bonds the one end 79 a of the magnetic flux collecting sheet 79 to the core 78 is provided at a position corresponding to the insertion hole 80 above the end of the core 78. . The adhesive member 81 is preferably a double-sided adhesive tape containing, for example, a magnetic material, but is not particularly limited as long as it can adhere the end 79a of the magnetic flux collecting sheet 79 to the core 78. In the present embodiment, the end 79a of the magnetic flux collecting sheet 79 comes into contact with the core 78 via the adhesive member 81 and is magnetically coupled, and the adhesive member 81 functions as a connecting means.

  In addition, since the other structure is the same as that of what was demonstrated in 7th Embodiment from 1st Embodiment, the same code | symbol is attached | subjected to the same member and the description is abbreviate | omitted.

  Next, the operation of this embodiment will be described.

  The antenna structure is stored in a predetermined storage space (not shown) in the housing 77. Further, the end 79 a of the magnetic flux collecting sheet 79 is inserted into the insertion hole 80. The end 79a of the magnetic flux collecting sheet 79 inserted into the housing 77 through the insertion hole 80 is bonded to the core 72 via the adhesive member 81, whereby the core 78 and the end 79a of the magnetic flux collecting sheet 79 are in contact with each other. And magnetically coupled. When a standard radio wave is received by the magnetic collecting sheet 79 and the core 78, time information is acquired based on the radio wave, and the current time data of the radio wristwatch is corrected.

  As described above, according to this embodiment, the magnetic flux collecting sheet 79 disposed on the upper portion of the housing 77 is brought into contact with the end portion of the core 78 of the antenna structure disposed inside the housing 77 to magnetically. It is supposed to be combined. Thereby, since the antenna length of the antenna structure can be extended by the amount of the magnetic collecting sheet 79, even when the core 78 cannot be enlarged as in the case where the antenna structure must be stored in a narrow space, Radio waves can be captured efficiently, and the reception sensitivity can be improved while realizing a reduction in module size.

  In this embodiment, since the core 78 and the magnetic flux collecting sheet 79 are brought into contact with each other by the adhesive member 81, the magnetic flux collecting sheet 79 can be reliably brought into contact with the core 78 by a simple method, and the receiving sensitivity is improved. be able to.

  Note that the present invention is not limited to the scope of the embodiments, as in the first to seventh embodiments.

[Ninth Embodiment]
Next, a ninth embodiment of a magnetic flux collecting sheet mounting structure according to the present invention and a radio wave wristwatch including the same will be described with reference to FIG. The ninth embodiment is different from the first embodiment to the eighth embodiment only in the coupling structure between the core of the antenna structure and the magnetic flux collecting sheet. Differences from the eighth embodiment to the eighth embodiment will be described.

  In the present embodiment, the radio-controlled wristwatch (not shown) includes a watch case (not shown) and a housing 85 (see FIG. 13), as in the first to eighth embodiments. FIG. 13 is a cross-sectional view showing a connection portion between an end portion of the core 86 of the antenna structure (not shown) and an end portion 87a of the magnetic flux collecting sheet 87 by enlarging a part of the housing 85.

  An insertion hole 88 is formed in the upper part of the housing 85 and corresponding to both ends of the core 86. A pair of magnetic flux collecting sheets 87 is arranged on the upper portion of the housing 85 as in the first to eighth embodiments. In the present embodiment, the magnetic flux collecting sheet 87 is a sheet having a spring property, and one end portion of each magnetic flux collecting sheet 87 is a bent portion 87 a that bends toward each end portion of the core 86. . The bent portion 87a of each magnetic flux collecting sheet 87 is inserted into the housing 85 through the insertion hole 88 of the housing 85, and the magnetic flux collecting sheet 87 is brought into contact with the core 86 by the urging force of itself. It is configured. Thereby, the magnetic flux collecting sheet 87 and the core 86 are magnetically coupled.

  In addition, since the other structure is the same as that of what was demonstrated in 8th Embodiment from 1st Embodiment, the same code | symbol is attached | subjected to the same member and the description is abbreviate | omitted.

  Next, the operation of this embodiment will be described.

  The antenna structure is stored in a predetermined storage space (not shown) in the housing 85. Further, the bent portion 87 a of the magnetic flux collecting sheet 87 is inserted into the insertion hole 88. The tip of the bent portion 87a of the magnetic flux collecting sheet 87 inserted into the housing 85 through the insertion hole 88 comes into contact with the core 72 and is magnetically coupled. When a standard radio wave is received by the magnetic current collecting sheet 87 and the core 86, time information is acquired based on the radio wave, and the current time data of the radio wristwatch is corrected.

  As described above, according to the present embodiment, the magnetic flux collecting sheet 87 disposed on the upper portion of the housing 85 is brought into contact with the end portion of the core 86 of the antenna structure disposed inside the housing 85 to magnetically. It is supposed to be combined. Thereby, since the antenna length of the antenna structure can be extended by the amount of the magnetic collecting sheet 87, even when the core 86 cannot be enlarged as in the case where the antenna structure must be stored in a narrow space, Radio waves can be captured efficiently, and the reception sensitivity can be improved while realizing a reduction in module size.

  In this embodiment, since the bent portion 87a of the magnetic flux collecting sheet 87 is brought into contact with the core 86 and magnetically coupled, the reception sensitivity can be improved without increasing the number of components.

  Note that the present invention is not limited to the scope of the embodiments, as in the first to eighth embodiments.

[Tenth embodiment]
Next, a magnetic flux collecting sheet mounting structure according to the present invention and a radio-controlled wristwatch including the same according to a tenth embodiment will be described with reference to FIG. Note that the tenth embodiment differs from the first embodiment to the ninth embodiment only in the coupling structure of the antenna structure core and the magnetic flux collecting sheet. Differences from the ninth embodiment to the ninth embodiment will be described.

  In this embodiment, the radio-controlled wristwatch (not shown) includes a watch case (not shown) and a housing 90 (see FIG. 14), as in the first to ninth embodiments. FIG. 14 is a cross-sectional view showing a connection portion between the end portion of the core 91 and the end portion of the magnetic flux collecting sheet 92 of the antenna structure (not shown) by enlarging a part of the housing 90.

Insertion holes 93 are formed in the upper portion of the housing 90 and corresponding to both end portions of the core 91. A pair of magnetic flux collecting sheets 92 is arranged on the upper portion of the housing 90 as in the first to ninth embodiments. In addition, extending portions 91 a extending toward the magnetic flux collecting sheet 92 are provided at both ends of the core 91, and the extending portion 91 a is inserted into the insertion hole 93 and contacts one end portion of the magnetic flux collecting sheet 92. Is configured to do. Thereby, the magnetic flux collecting sheet 92 and the core 91 are magnetically coupled.
The method of forming the extending portion 91a is not particularly limited. For example, when the core 91 is formed by laminating thin plate members such as amorphous metals, one or several of them are collected. You may comprise so that it may extend toward the magnetic sheet 92. For example, when the core 91 is integrally formed of ferrite or the like, the core 91 is molded so as to have an extending portion 91a.

  In addition, since the other structure is the same as that of what was demonstrated in 1st Embodiment to 9th Embodiment, the same code | symbol is attached | subjected to the same member and the description is abbreviate | omitted.

  Next, the operation of this embodiment will be described.

  The antenna structure is stored in a predetermined storage space (not shown) in the housing 90. Further, the extending portion 91 a of the core 91 is inserted into the insertion hole 93. The extending portion 91a inserted from the insertion hole 93 comes into contact with the magnetic flux collecting sheet 92 and is magnetically coupled. When a standard radio wave is received by the magnetic collecting sheet 92 and the core 91, time information is acquired based on the radio wave, and the current time data of the radio wristwatch is corrected.

  As described above, according to the present embodiment, the magnetic flux collecting sheet 92 disposed on the upper portion of the housing 90 is brought into contact with the end of the core 91 of the antenna structure disposed inside the housing 90 to magnetically. It is supposed to be combined. Thereby, since the antenna length of the antenna structure can be extended by the amount of the magnetic collecting sheet 92, even when the core 91 cannot be enlarged as in the case where the antenna structure must be stored in a narrow space, Radio waves can be captured efficiently, and the reception sensitivity can be improved while realizing a reduction in module size.

  In the present embodiment, the extending portion 91a of the core 91 is brought into contact with and magnetically coupled with the magnetism collecting sheet 92, so that the receiving sensitivity can be improved without increasing the number of components.

  Note that the present invention is not limited to the scope of the embodiments, as in the first to ninth embodiments.

  In each of the above embodiments, the insertion hole or the through hole is provided in the housing so that the core of the antenna structure and the magnetic flux collecting sheet can be brought into contact with each other. For example, a part of the upper part of the housing may be cut away.

  Further, in each of the above embodiments, a gear presser plate that presses the gear is arranged on the upper part of the housing, and the magnetic flux collecting sheet is formed to be equal to or thinner than the thickness of the gear presser plate, so that Although the existing space is used as an arrangement space for the magnetic collecting sheet and the increase in the thickness of the housing due to the arrangement of the magnetic collecting sheet is eliminated, the method for eliminating the increase in the thickness of the housing is not limited to this. For example, a space for arranging the magnetic flux collecting sheet may be ensured by partially cutting the upper portion of the housing.

  Examples of the synthetic resin forming the housing include epoxy resin, phenol resin, melamine resin, urea resin, unsaturated polyester resin, polyimide resin, furan resin, polybutadiene resin, ionomer resin, EEA resin, AAS resin (ASA). Resin), AS resin, ACS resin, ethylene vinyl acetate copolymer, ethylene vinyl alcohol copolymer resin, ABS resin, vinyl chloride resin, chlorinated polyethylene resin, cellulose acetate resin, fluorine resin, polyacetal resin, polyamide resin 6,66, Polyamide resin 11,12, polyarylate resin, thermoplastic polyurethane elastomer, liquid crystal polymer, polyether ether ketone, polysulfone resin, polyether sulfone resin, high density polyethylene, low density polyethylene, linear low density polyethylene, polyethylene tele Tartrate, polycarbonate resin, polystyrene resin, polyphenylene ether resin, polyphenylene sulfide resin, polybutadiene resin, polypropylene resin, polypropylene resin, methacrylic resin, methylpentene polymer, etc. may be used, and among these, heat resistance and dimensional stability From the viewpoint of strength and the like, phenol resin, epoxy resin and the like are preferable.

  In the above embodiment, the radio wave wristwatch 100 is illustrated as the electronic device. However, the present invention is not limited to this, and any electronic device may be used as long as the radio wave is received by the antenna structure 15. For example, a fixed radio timepiece or a small radio may be used.

It is a front view which shows the radio wave wristwatch illustrated as a suitable example of the electronic device of Embodiment 1 to which this invention is applied. It is the II-II sectional view taken on the line of the radio-controlled wristwatch of FIG. It is a top view which shows the magnetic flux collection sheet attachment structure with which the radio-controlled wristwatch of FIG. 1 is equipped. It is the perspective view which showed typically the magnetic flux collection sheet attachment structure with which the radio-wave wristwatch of FIG. 1 is equipped. It is sectional drawing which showed the connection part of the core of the antenna structure in 1st Embodiment, and a magnetic flux collecting sheet. It is sectional drawing which showed the connection part of the core of the antenna structure in 2nd Embodiment, and a magnetic flux collecting sheet. It is sectional drawing which showed the connection part of the core of the antenna structure in 3rd Embodiment, and a magnetic flux collecting sheet. It is sectional drawing which showed the connection part of the core of the antenna structure in 4th Embodiment, and a magnetic flux collecting sheet. It is sectional drawing which showed the connection part of the core of the antenna structure in 5th Embodiment, and a magnetic flux collecting sheet. It is sectional drawing which showed the connection part of the core of the antenna structure in 6th Embodiment, and a magnetic flux collecting sheet. It is sectional drawing which showed the connection part of the core of the antenna structure in 7th Embodiment, and a magnetic flux collecting sheet. It is sectional drawing which showed the connection part of the core of the antenna structure in 8th Embodiment, and the magnetic flux collecting sheet. It is sectional drawing which showed the connection part of the core of the antenna structure in 9th Embodiment, and a magnetic flux collecting sheet. It is sectional drawing which showed the connection part of the core of the antenna structure in 10th Embodiment, and a magnetic flux collecting sheet.

Explanation of symbols

2 watch case 3 housing 7 dial 12 solar panel 15 antenna structure 16 storage space 17 core 18 coil 20 circuit board 24 gear 25 gear presser plate 27 insertion hole 30 magnetic flux collecting sheet 31 elastic member 100 radio wave watch

Claims (13)

A housing;
An antenna structure disposed inside the housing and including a core;
A pair of magnetic flux collecting sheets disposed on the upper part of the housing,
The magnetism collecting sheet mounting structure, wherein the pair of magnetism collecting sheets and both ends of the core are magnetically coupled. A bent portion that bends toward both ends of the core is provided at the ends of the pair of magnetic flux collecting sheets,
2. The magnetic flux collecting sheet mounting according to claim 1, wherein the bent portion is in contact with both end portions of the core, whereby the pair of magnetic flux collecting sheets and the both end portions of the core are magnetically coupled. Construction. Providing extending portions extending toward the magnetic flux collecting sheet at both ends of the core,
The magnetic flux collecting sheet mounting structure according to claim 1, wherein the pair of magnetic flux collecting sheets are magnetically coupled to both ends of the core by contacting the extending portion. A housing;
An antenna structure disposed inside the housing and including a core;
A pair of magnetic flux collecting sheets disposed on an upper portion of the housing;
A connection means for connecting the pair of magnetic flux collecting sheets and the antenna structure;
The magnetic flux collecting sheet mounting structure, wherein the pair of magnetic flux collecting sheets and both ends of the core are magnetically coupled by the connecting means.   The magnetic flux collecting sheet mounting structure according to claim 4, wherein the connecting means is an elastic member that presses the magnetic flux collecting sheet toward an end of the core.   5. The magnetic flux collecting sheet mounting structure according to claim 4, wherein the connection means is a thick portion provided at an end portion of the core and protruding up to a position where the connection means comes into contact with the magnetic flux collecting sheet.   5. The connection means is a coil spring that is disposed between the core and the magnetic flux collecting sheet and has one end in contact with the core and the other end in contact with the magnetic flux collecting sheet. 2. Magnetic flux collecting sheet mounting structure described in 1.   The connecting means is a magnetism collecting member that is disposed between the core and the magnetism collecting sheet, and has elasticity that has one end in contact with the core and the other end in contact with the magnetism collecting sheet. The magnetic flux collecting sheet mounting structure according to claim 4. The connection means is formed in a part of the housing, and includes a sheet guide portion that forms a sheet insertion portion with the core.
5. The magnetic flux collecting sheet mounting according to claim 4, wherein the magnetic flux collecting sheet abuts against the core when the magnetic flux collecting sheet is inserted into the sheet guiding portion. Construction. A recess for sandwiching the magnetic flux collecting sheet in a part of the core is provided,
The magnetism collecting sheet mounting structure according to claim 4, wherein the connecting means is a recess.   5. The magnetic flux collecting sheet mounting structure according to claim 4, wherein the connecting means is an adhesive member that is disposed between the core and the magnetic flux collecting sheet and adheres the core and the magnetic flux collecting sheet. . Magnetic flux collecting sheet mounting structure according to any one of claims 1 to 11,
A clock module;
A radio-controlled wristwatch characterized by comprising: On the upper part of the housing, a gear press plate for pressing the gears constituting the timepiece module is arranged,
The radio-controlled wristwatch according to claim 12, wherein the pair of magnetic flux collecting sheets is formed to have a thickness smaller than that of the gear presser plate.

Images