JP2008298585A - Receiver and radio clock - Google Patents

Abstract

A receiving device capable of improving sufficient reception sensitivity even when the antenna structure is housed in a space surrounded by a device body case and a back cover formed of a radio wave shielding material such as metal, and the like. Provide radio clock.
Both ends 81a and 81b of an antenna structure 8 including a core 81 and a coil 82 wound around the core 81 are formed on a dial plate 11 provided close to the windshield 5. It was configured to be inserted into the insertion portion 11b, and radio waves entering from the outside were configured to enter the core 81 from both ends 81a and 81b through the windshield 5 and the dial plate 11, respectively.
[Selection] Figure 2

Description

  The present invention relates to a receiving device and a radio timepiece.

  2. Description of the Related Art Conventionally, a receiver having an antenna structure that has a core and a coil wound around the core and receives a standard radio wave including time information, and a radio-controlled timepiece and other electronic devices incorporating such a receiver are known. It has been. Such radio timepieces and other electronic devices have a function of automatically correcting the current time based on the standard radio wave received by the antenna structure.

In a receiving apparatus including such an antenna structure and a radio timepiece including the antenna structure, when a housing (for example, an outer case of the timepiece) including the antenna structure is formed of a conductive metal, the flow of radio waves (of magnetic flux) (Flow) is shielded by the housing, and there is a problem that sufficient reception sensitivity cannot be obtained.
In order to solve this problem, even when the housing containing the antenna structure is made of metal, by forming a thin thin part corresponding to the antenna on the metal back cover, 2. Description of the Related Art A radio timepiece that reduces the shielding of radio waves (magnetic flux) by a casing and improves the reception performance of standard radio waves is known (see, for example, Patent Document 1).
JP 2004-347552 A

  However, in such conventional receivers and radio timepieces, the flow of radio waves (flow of magnetic flux) is shielded by a metal back cover or other housing portion, although the antenna structure is made to correspond to the thin wall portion. This point cannot be completely eliminated. For this reason, there is a problem that it is difficult to improve sufficient reception efficiency and reception sensitivity.

  Therefore, the present invention has been made to solve the above-described problems, and can sufficiently improve reception sensitivity even when the antenna structure is housed in a conductive device body case made of metal or the like. An object of the present invention is to provide a receiving device and a radio timepiece.

In order to solve the above problems, the present invention
The invention according to claim 1 is an antenna structure including a core and a coil wound around the core;
A cylindrical conductive device main body case for housing and arranging the antenna structure,
A conductive plate member for closing one end of the cylindrical conductive device body case;
A non-conductive cover member for closing the other end of the cylindrical conductive device main body case;
A proximity member provided in proximity to the non-conductive cover member,
The receiving apparatus is characterized in that both end portions of the core are bent toward the proximity member, and the bent portion is inserted into an insertion portion formed in the proximity member.

The invention according to claim 2 includes an antenna structure including a core and a coil wound around the core;
A cylindrical conductive device main body case for housing and arranging the antenna structure,
A conductive plate member for closing one end of the cylindrical conductive device body case;
A non-conductive windshield transparent member that closes the other end of the cylindrical conductive device body case;
A dial provided in proximity to the nonconductive windshield transparent member,
The receiving device is characterized in that both end portions of the core are bent toward the dial, and the bent portions are inserted into insertion portions formed on the dial.

The invention according to claim 3 is an antenna structure including a core and a coil wound around the core;
A cylindrical conductive device main body case for housing and arranging the antenna structure,
A conductive plate member for closing one end of the cylindrical conductive device body case;
A non-conductive windshield transparent member that closes the other end of the cylindrical conductive device body case;
The dial provided in proximity to the non-conductive windshield transparent member, and a parting member provided on the outer periphery of the dial,
The receiving apparatus is characterized in that both ends of the core are bent toward the parting member, and the bent part is inserted into an insertion part formed in the parting member.

The invention according to claim 4 further includes at least two magnetic members provided on a part of the proximity member facing the non-conductive cover member,
2. The receiving device according to claim 1, wherein both end portions of the core are in magnetic contact with the at least two magnetic members via the insertion portion.

The invention according to claim 5 further includes at least two magnetic members provided on a part of the dial plate on a side facing the non-conductive transparent member for windshield,
The receiving device according to claim 2, wherein both end portions of the core are in magnetic contact with the at least two magnetic members via the insertion portion.

  The invention according to claim 6 is the receiving apparatus according to claim 5, wherein the magnetic member is a plurality of time-character members provided on an outer periphery on the dial.

The invention according to claim 7 is the receiving device according to any one of claims 1 to 6;
A band for mounting the cylindrical conductive device main body case on a part of a user's body;
It is a radio timepiece characterized by comprising.

The invention according to claim 8 is an antenna structure including a core and a coil wound around the core,
A cylindrical conductive device main body case for housing and arranging the antenna structure,
A conductive plate member for closing one end of the cylindrical conductive device body case;
A non-conductive cover member for closing the other end of the cylindrical conductive device main body case;
A proximity member provided in proximity to the non-conductive cover member,
The receiving device is characterized in that both end portions of the core are bent toward the proximity member, and the bent portion is brought into contact with a surface of the proximity member on the conductive plate member side. .

The invention according to claim 9 is an antenna structure including a core and a coil wound around the core,
A cylindrical conductive device main body case for housing and arranging the antenna structure,
A conductive plate member for closing one end of the cylindrical conductive device body case;
A non-conductive windshield transparent member that closes the other end of the cylindrical conductive device body case;
A dial provided in proximity to the nonconductive windshield transparent member,
The receiving device is characterized in that both ends of the core are bent toward the dial plate, and the bent portion is brought into contact with the surface of the dial plate on the conductive plate member side. .

The invention according to claim 10 includes an antenna structure including a core and a coil wound around the core;
A cylindrical conductive device main body case for housing and arranging the antenna structure,
A conductive plate member for closing one end of the cylindrical conductive device body case;
A non-conductive windshield transparent member that closes the other end of the cylindrical conductive device body case;
The dial provided in proximity to the non-conductive windshield transparent member, and a parting member provided on the outer periphery of the dial,
The receiving apparatus is characterized in that both ends of the core are bent toward the parting member, and the bent part is brought into contact with the surface of the parting member on the side of the conductive plate member. .

The invention according to claim 11 further includes at least two magnetic members provided on a part of the proximity member facing the non-conductive cover member,
The receiving device according to claim 8, wherein both end portions of the core are arranged to face the at least two magnetic members via the non-conductive cover member.

The invention described in claim 12 further includes at least two magnetic members provided on a part of the dial plate on a side facing the non-conductive transparent member for windshield,
The receiving device according to claim 9, wherein both end portions of the core are in magnetic contact with the at least two magnetic members via the insertion portion.

  A thirteenth aspect of the present invention is the receiving device according to the twelfth aspect, wherein the magnetic member is a plurality of time character members provided on an outer periphery on the dial.

The invention according to claim 14 is the receiving device according to any one of claims 8 to 13,
A band for mounting the cylindrical conductive device main body case on a part of a user's body;
It is a radio timepiece characterized by comprising.

  According to the present invention, radio waves are transmitted to the antenna structure from the end of the core of the antenna structure that is in contact with or inserted into a proximity member such as a dial plate or parting member located on the non-conductive cover member side such as a windshield. Since it penetrates, even when the antenna structure is housed in a case formed of a material that shields radio waves, such as metal, the radio waves are not shielded by the case. For this reason, even when the case is made of metal or the like and has a high-grade appearance, the reception efficiency of radio waves by the antenna structure can be increased and sufficient reception sensitivity can be obtained.

[First Embodiment]
First, with reference to FIGS. 1 to 6, a first embodiment of a receiver and a radio-controlled timepiece including the receiver according to the present invention will be described. In this embodiment, a case where a receiving device is mounted on a wristwatch-type radio-controlled wristwatch will be described as an example.

  FIG. 1 is a front view showing a schematic configuration of a radio-controlled wristwatch provided with a receiving apparatus according to the present embodiment. 2 is a sectional view taken along line II-II in FIG. 1, FIG. 3 is a sectional view taken along line III-III in FIG. 1, and FIG. 4 is an exploded perspective view of the radio-controlled wristwatch shown in FIG. .

As shown in FIGS. 2 and 4, the radio-controlled wristwatch 100 is provided with a wristwatch case (watchcase) 1 formed in an annular short column shape. The wristwatch case 1 is a conductive device main body case formed of a metal or other conductive member such as stainless steel or titanium. The wristwatch case 1 is hollow inside and has an opening 1a at the front side end and the back side end of the radio wave wristwatch 100. , 1b.
A band attaching portion 3 to which the watch band 2 is attached is formed at both upper and lower ends in FIG. 1 of the watch case 1, that is, at a 12 o'clock side end and a 6 o'clock side end of the watch. In addition, a plurality of operation buttons 4 for inputting various operation instructions such as a time adjustment instruction are provided on the outer periphery of the wristwatch case 1.

A windshield glass 5 as a nonconductive cover member or a nonconductive transparent windshield member made of a nonconductive material closes the opening 1a at the opening 1a at the front end of the wristwatch case 1. In addition, a metal back cover 6 serving as a conductive plate member is inserted into the opening 1b at the back side end of the watch case 1 via a waterproof ring 16 so as to close the opening 1b. Attached.
The non-conductive material forming the windshield 5 is, for example, glass that is a material that does not shield the flow of radio waves.

In addition, a module case 7 made of, for example, a resin is provided inside the wristwatch case 1. The module case 7 is preferably formed of a material that does not shield radio waves.
Inside the module case 7 are provided a watch movement (not shown), a battery (not shown) for supplying power to each part of the radio-controlled wristwatch 100, an antenna structure 8, a receiving circuit (not shown), and the like. Various electronic components such as the circuit board 9 (see FIG. 3) are accommodated.
The antenna structure 8 is disposed in the module case 7 via the holding member 15. The holding member 15 is, for example, an adhesive having a cushioning property, and functions as a buffer member that prevents rattling of the antenna structure 8 and also reduces an impact applied to the antenna structure 8.

  A parting member 10 is disposed between the module case 7 and the windshield 5 along the inner periphery of the watch case 1. The parting member 10 is made of a non-conductive member such as a resin.

  In addition, a dial 11 is arranged inside the watch case 1 so as to face the back side of the windshield 5 (the lower side in FIG. 2). The peripheral portion of the dial 11 is supported between the module case 7 and the parting member 10. In the embodiment, the dial plate 11 is formed of a non-conductive member such as a resin, and is a proximity member provided in proximity to the windshield 5 as a cover member.

FIG. 5 is an exploded view showing the positional relationship between the dial plate 11 and the antenna structure 8, and FIG. 6 is a main portion showing the contact state between the dial plate 11 and the end portions 81 a and 81 b of the core 81. FIG.
As shown in FIG. 5, twelve hour letter members 11a corresponding to 1 o'clock to 12 o'clock of the timepiece are provided at substantially equal intervals on the peripheral portion of the dial 11 on the surface side (upper surface in FIG. 2). ing.
2 and 6 at positions corresponding to the hour character member 11a indicating 1 o'clock and the hour character member 11a indicating 1 o'clock. As shown in FIG. 2, through-hole-shaped insertion portions 11b that reach the back side of the time-character member 11a are formed.

  A shaft hole 12 is formed in a substantially central portion of the dial plate 11, and a pointer shaft 13 constituting a timepiece movement projects upward from below through the shaft hole 12. The timepiece movement is attached to the pointer shaft 13 and moves the hands 14 such as an hour hand and a minute hand disposed between the windshield 5 and the dial 11 above the dial 11.

The antenna structure 8 includes a core 81 and a coil 82 wound around the core 81, and is configured such that when a radio wave is transmitted through the core 81, an induced current is generated in the coil 82. The end of the coil 82 is connected to a connection terminal 9 a provided on the circuit board 9.
In the present embodiment, the receiving device 80 includes the antenna structure 8 and the dial 11 that is a proximity member.

The core 81 has a magnetic permeability of ferrite or the like (refers to a proportional constant μ when the relationship between the magnetic field or the magnetic field strength H and the magnetic flux density B is expressed by B = μ H) or relative permeability. It is made of a magnetic material having a high ratio of vacuum permeability μ0 = μs = μ / μ0. The material forming the core 81 is not limited to ferrite, and any material can be used as long as it has a property that functions sufficiently as the core 81 of the antenna, such as an amorphous alloy.
The core 81 is not limited to a single layer structure, and may be composed of a plurality of magnetic materials, for example, a laminated structure in which a plurality of amorphous foils are laminated.

As shown in FIG. 1, the entire core 81 is formed in a substantially arc shape along the inner peripheral surface of the watch case 1.
2, the core 81 has a configuration in which both end portions 81a and 81b of the core 81 are bent obliquely upward toward the side where the windshield glass 5 is provided (FIGS. 2 and 2). 3). In FIG. 3, only the shape on the end 81a side is shown). That is, as shown in FIG. 2, the core 81 includes a rod-shaped core portion 81A around which the coil 82 is wound, and a bent portion 81B that is bent obliquely upward from the rod-shaped core portion 81A toward the windshield 5 side. I have.
As shown in FIGS. 1 and 5, the antenna structure 8 is disposed at the 12 o'clock side position in the wristwatch case 1. Both end portions 81a and 81b of the core 81 in the antenna structure 8 are inserted into the insertion portion 11b of the dial 11 corresponding to the hour character member 11a indicating 1 o'clock and the hour character member 11a indicating 1 o'clock, respectively. As shown in FIGS. 2 and 6, the front end surfaces of both end portions 81a and 81b are in contact with the back surface of the hour character member 11a.

  Thus, both end portions 81a and 81b of the core 81 are directed to the dial plate 11 side. For this reason, the interlinkage magnetic field (magnetic flux) is generated from the windshield 5 side as shown by the flow of radio waves indicated by arrows in FIG. The direction of entering and the direction of exiting to the windshield 5 opposite to this direction is not the direction facing the inner peripheral surface of the watch case 1 but the direction facing the windshield 5 and the dial 11.

Next, the operation of this embodiment will be described.
When the standard radio wave is received by the receiving device 80, the magnetic field component of the radio wave is transmitted through the non-conductive windshield 5 formed of a material that does not shield the radio wave and the time character member 11a provided on the dial plate 11, respectively. Then, after entering one bent portion 81B of the antenna structure 8 from one end 81a (or 81b) of the core 81 inserted into the insertion portion 11b of the dial plate 11, and further entering the rod-shaped core portion 81A Then, it enters the other bent portion 81B of the antenna structure 8 and passes through the rod-shaped core portion 81A to the other side end portion 81b (or 81a) of the core 81. During this passage, an alternating current is induced in the coil 82 wound around the rod-shaped core portion 81A (induced current), and an alternating voltage is generated at both ends of the coil 82 accordingly. Then, this AC voltage is sent as an analog reception signal to a reception circuit (not shown).
Then, the reception circuit performs processing such as amplification, demodulation, and decoding on the analog reception signal, and acquires digital time data. The radio wave wristwatch 100 appropriately corrects the current time based on the acquired time data.

  As described above, according to the present embodiment, the radio-controlled wristwatch 100 is a material that shields radio waves, such as the wristwatch case 1 and the back cover 6, both in order to improve design and produce a high-class feeling. For this reason, both ends of the core 81 of the antenna structure 8 have a structure in which external radio waves cannot easily enter the radio wristwatch 100 from the watch case 1 side and the back cover 6 side. 81a and 81b are inserted into the insertion portion 11b formed on the dial 11 which is a proximity member close to the windshield 5 formed of a material that does not shield radio waves. It is possible to enter the rod-shaped core portion 81A of the antenna structure 8 from both end portions 81a and 81b and generate an electromotive force in the coil 82 wound around the rod-shaped core portion 81A. Degree can be significantly improved.

In addition, the antenna structure has directivity that reacts to a magnetic field in an extension line direction (axial direction of the core and the coil) connecting the end portions of the core. That is, since the direction in which the coil and the magnetic field interlink is the maximum sensitivity direction, a metal member such as a wristwatch case or a back cover is disposed close to the axial direction of the core or the coil or in the vicinity thereof. And the magnetic field which links a coil is prevented, and the receiving sensitivity of an antenna structure falls.
In this regard, in the present embodiment, as described above, since both end portions 81a and 81b of the core 81 are inserted into the dial plate 11, the both ends 81a and 81b of the core 81 are generated in the axial direction or in the vicinity thereof. The magnetic field does not interfere with metal members such as the wristwatch case 1 and the back cover 6, and the radio wave reception sensitivity in the antenna structure 8 can be improved.

[Second Embodiment]
Next, with reference to FIG. 7, a second embodiment of a radio timepiece including a receiving device and the receiving device will be described. In the present embodiment, as in the first embodiment, a case where a receiver is mounted on a wristwatch-type radio-controlled wristwatch as an example of a radio-controlled timepiece will be described as an example. In the following, differences from the first embodiment will be described. .

FIG. 7 is a cross-sectional view of a main part of a radio-controlled wristwatch (not shown) according to the present embodiment.
As shown in FIG. 7, in this embodiment, between the module case 62 and the windshield 5 inside the watch case 1 and along the inner periphery of the watch case 1, as in the first embodiment. A parting member 63 is arranged. The parting member 63 is made of a non-conductive member such as a resin. In the present embodiment, the parting member 63 is a proximity member provided close to the windshield 5 as a cover member.

  The parting member 63 is formed with an insertion portion 63a into which end portions 66a and 66b of the core 66 described later are inserted. In addition, an insertion groove 62 a is formed in the module case 62 from the inner surface toward the insertion portion 63 a of the parting member 63.

  In addition, an antenna structure 65 including a core 66 and a coil 67 is disposed below the dial plate 60 disposed below the windshield 5.

The entire core 66 is formed in a substantially arc shape along the inner peripheral surface of the watch case 1.
Further, as shown in FIG. 7, the core 66 has a configuration in which both end portions 66 a and 66 b of the core 66 are bent obliquely upward toward the side where the windshield glass 5 is provided. That is, as shown in FIG. 7, the core 66 includes a rod-shaped core portion 66A around which the coil 67 is wound and a bent portion 66B that is bent obliquely upward from the rod-shaped core portion 66A toward the windshield 5 side. I have. Then, both end portions 66 a and 66 b of the core 66 are inserted into a recess-shaped insertion portion 63 a formed in a part of the parting member 63 via the insertion groove 62 a of the module case 62.

  In the present embodiment, a receiving device 69 is configured by a parting member 63 as a proximity member provided in the vicinity of the windshield 5 as a cover member and the antenna structure 65.

  In addition, since the other structure is the same as that of what was shown 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.
When the standard radio wave is received by the receiving device 69, the magnetic field component of the radio wave passes through the windshield 5 and the parting member 63 formed of a material that does not shield the radio wave, and is inserted into the insertion part 63a of the parting member 63. It enters the antenna structure 65 from one end 66a (or 66b) of 66 and passes to the other end 66b (or 66a) of the core 66. As a result, an alternating current is induced in the coil 67 wound around the core 66 (induced current), and an alternating voltage is generated at both ends of the coil 67 accordingly. Then, this AC voltage is sent as an analog reception signal to a reception circuit (not shown).
Then, the reception circuit performs processing such as amplification, demodulation, and decoding on the analog reception signal, and acquires digital time data. The radio wave wristwatch corrects the current time as appropriate based on the acquired time data.

As described above, according to the present embodiment, since radio waves enter the core 66 of the antenna structure 65 through the parting member 63, the wristwatch case 1 is improved in order to improve design and produce a high-class feeling. Even when the back cover 6 is made of a material that shields radio waves, such as metal, the reception sensitivity can be greatly improved.
Further, since radio waves enter the core 66 of the antenna structure 65 through the parting member 63 in this way, for example, the dial 60 is also formed of a material that shields the flow of radio waves, such as metal, and has a high-class appearance. Even in this case, the receiving sensitivity can be improved.

  In the present embodiment, a configuration in which the insertion groove 62a is formed in the module case 62 is shown as an example. Instead of the insertion groove 62a, a notch is formed in a part of the inside of the module case 62. It is good also as a structure which arrange | positions the core 66 along this notch part, and inserts the edge parts 66a and 66b in the insertion part 63a.

  In addition, the shape of the insertion portion 63 a of the parting member 63 is not limited to the illustrated example, and may be, for example, a shallow concave part or a through hole that penetrates to the upper surface of the parting member 63.

  For example, as shown in FIG. 8, the parting member 71 may not be provided with an insertion portion, and both ends 73 a and 73 b of the core 73 may be in contact with the lower surface of the parting member 71. Also in this case, the receiving device 75 is configured by the close-out member 71 as a proximity member provided in the vicinity of the windshield 5 as a cover member, and the antenna structure 72 including the core 73 and the coil 74. .

  The present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the scope of the technical idea and object of the present invention.

For example, in the present embodiment, the case where the cover member is the windshield 5 made of glass has been described. However, the material forming the cover member may be any material that does not shield the flow of radio waves, and is not limited to glass. For example, the windshield glass may be formed of a transparent resin or the like.
Moreover, a cover member is not limited to a windshield, For example, a back cover may be sufficient. In this case, the back cover is formed of a material that does not block the flow of radio waves, and the antenna structure is arranged so that both end portions of the core are in contact with adjacent members that are close to the back cover.
For example, when the receiving device is mounted on an electronic device other than a radio timepiece such as a cellular phone, a cover member formed of a material that does not shield the flow of radio waves is used as a part of a lid of a case (housing). Also good. In this case, the cover member may be formed of a non-transparent material such as an opaque resin that is a material that does not shield the flow of radio waves.

  In the present embodiment, the watch case 1 and the back cover 6 are separated from each other. However, the watch case and the back cover may be integrated into a one-piece structure.

  Further, in the present embodiment, the dial plate 11 is described as an example having a single layer structure formed of resin or the like, but the dial plate 11 is not limited to a single layer structure, and includes a plurality of layers. A laminated structure may be used. Moreover, the material which comprises the dial 11 is not limited to resin, For example, glass may be sufficient. Alternatively, the dial plate 11 may be formed of a transparent material such as transparent glass or resin (plastic), and a solar panel (not shown) may be provided on the back side of the dial plate 11 so as to overlap the dial plate 11. Good. In this case, the solar panel is formed of a flexible substrate made of a material that does not shield the flow of radio waves (for example, polyimide).

Further, the shape of the antenna structure 8 is not limited to that shown in the present embodiment.
For example, in the present embodiment, the case where the planar shape of the antenna structure 8 is substantially arc-shaped has been described as an example. However, the antenna structure having a shape extending substantially linearly from one end 81a to the other end 81b of the core 81. It may be the body. Moreover, the antenna structure of the shape where the intermediate part of the core 81 is formed in circular arc shape, and both ends are linear may be sufficient.
Further, the angle, the shape, and the like at which both end portions 81a and 81b of the core 81 of the antenna structure 8 are bent toward the dial plate 11 are not limited to the illustrated example of the present embodiment.

  Further, in the present embodiment, the example in which the antenna structure 8 is arranged in the 12 o'clock direction of the radio-controlled wristwatch 100 has been described. However, the position and orientation of the antenna structure 8 are not limited thereto.

Further, in the present embodiment, both end portions 81a and 81b of the core 81 are respectively connected to the hour character member 11a indicating 1 o'clock of the dial 11 and the insertion portion 11b formed at positions corresponding to the hour character member 11a indicating 11:00. Although the case where it inserts was demonstrated as an example, the position of the insertion part 11b in which the both ends 81a and 81b of the core 81 are inserted is not limited to this.
For example, the insertion portion 11b into which both end portions 81a and 81b of the core 81 are inserted may be provided at an arbitrary position that does not correspond to the position at which the time character member 11a is provided. For example, an insertion portion 11 b that penetrates the dial plate 11 may be provided so that both end portions 81 a and 81 b of the core 81 inserted into the insertion portion 11 b protrude from the surface of the dial plate 11.
Moreover, in this embodiment, although the case where the insertion part 11b has reached the back surface of the time character member 11a was taken as an example, for example, as shown in FIG. It does not reach the back surface, and is formed to a depth of about half the thickness of the dial 20, and the end portions 81 a and 81 b of the core 81 may be inserted therein.
Further, for example, as shown in FIG. 9B, the insertion portion is not formed in the dial plate 25, and the end portions 81 a and 81 b of the core 81 are simply the back surface of the dial plate 25 and correspond to the time character member 21. You may comprise so that a position may be contacted. Even in this case, more radio waves enter the magnetic flux of the radio waves collected on the time-shaped member 21 formed of a magnetic member from the end portions 81a and 81b of the core 81, and an induced current is efficiently generated by the coil. it can.
Note that the end portions 81a and 81b of the core 81 may be provided so as to be in contact with the portion on the back surface of the dial plate 25 where the time character member 21 is not provided. In this case, the freedom degree of arrangement | positioning of an antenna structure improves. Even in this case, the receiving sensitivity of the antenna structure can be improved by bringing the end portions 81a and 81b of the core 81 into contact with a proximity member (dial plate 25) close to the non-conductive member.

  Further, the dial may be formed of the same magnetic material as that of the core, and the core of the antenna structure may be brought into contact with the dial. In this case, as shown in FIG. 10 and FIG. 11 (a), the dial is composed of a left dial 30a and a right dial 30b. Insertion portions 35 that reach the back side of the hour character 31 are formed at positions corresponding to the hour character 31 shown and the hour character 31 showing 11:00. Then, both end portions 34 a and 34 b of the core 34 of the antenna structure 32 are inserted into the insertion portion 35. As a result, more radio waves enter from both end portions 34 a and 34 b of the core 34, and an induced current can be efficiently generated by the coil 33.

  Furthermore, as shown in FIG. 11 (b), the dial 40 is composed of two upper and lower layers, for example, the first layer 42 provided on the side (upper side) facing the windshield (not shown) is formed of a magnetic member, The second layer 41 provided on the lower side may be formed of a non-conductive member such as a resin. In this case, as shown in FIG. 11B, the first layer is composed of a left first layer 42a and a right first layer 42b, and a time character 43 is provided on the surface of each first layer 42a, 42b. In addition, in this time character 43, through holes 44 reaching the back side of the time character 43 are respectively formed in the portions of the second layer 41 corresponding to the time character 43 indicating 1 o'clock and the time character 43 indicating 11 o'clock. Form. Then, both end portions 46 a and 46 b of the core 46 of the antenna structure 45 are respectively inserted into the through holes 44. As a result, more radio waves enter from both end portions 46 a and 46 b of the core 46, and an induced current can be efficiently generated by the coil 47.

Furthermore, the dial plate and the time character member arranged on the dial plate are not limited to those shown in FIGS. Here, a description will be given of a modification of the dial and the hour letter member disposed on the dial.
FIG. 12 is a cross-sectional view of a main part of a radio-controlled wristwatch (not shown) showing a modification of the dial and the timepiece member, and FIG. 13A is an exploded perspective view showing an example of the dial shown in FIG. 13 (b) is an enlarged view of the time character member shown in FIG. 13 (a), and FIG. 13 (c) is a diagram showing the contact state between the dial and the time character member and the end of the core. It is an expanded sectional view of a part.

  As shown in FIG. 12, in this modification, the radio-controlled wristwatch includes a dial 51 as a proximity member provided in the vicinity of the windshield 5 as a cover member, and an antenna structure 55. A receiving device 50 is provided.

  As shown in FIG. 13A, in this modification, the dial 51 includes a dial main body 52 and a time character member 53 disposed on the dial main body 52. A shaft hole 52b is provided in a substantially central portion of the dial main body 52, and a through hole 52a for fixing the hour clock member 53 at a position corresponding to 1 o'clock to 12 o'clock of the timepiece on the peripheral portion of the dial main body 52. Are formed in 12 pairs at approximately equal intervals.

  The time character member 53 is a magnetic member formed of a magnetic material having high magnetic permeability or relative magnetic permeability such as ferrite and amorphous. As shown in FIGS. 13A and 13B, the time character member 53 has two legs 54 and 54 on the side attached to the dial main body 52. The legs 54, 54 are formed to have a length substantially equal to the thickness of the dial main body 52, and the hour character member 53 has the legs 54, 54 in the through holes 52a as shown in FIG. It is fixed on the dial main body 52 by being inserted.

  As shown in FIG. 12, in this modified example, an antenna structure 55 is provided on the back side of the dial 51 (the lower surface in FIG. 13A). The antenna structure 55 is arranged such that, for example, both end portions 56 a and 56 b of the core 56 are located at positions corresponding to the positions where the time character members 53 are arranged. As shown in FIGS. 13B and 13C, the tips of the end portions 56a and 56b of the core 56 are inserted into the through holes 52 and exposed to the back surface side of the dial 51, respectively. The end portions of the leg portions 54 and 54 are brought into contact with each other.

  Thus, according to the present embodiment, both end portions 56a and 56b of the core 56 of the antenna structure 55 come into contact with the dial 51, which is a proximity member close to the windshield 5 formed of a material that does not shield radio waves. Are inserted into through holes 52a formed in the dial 51. For this reason, for example, in order to improve the design of a radio-controlled wristwatch and produce a high-class feeling, even when the wristwatch case and the back cover are formed of a material that shields radio waves, such as metal, the radio waves are transmitted at both ends 56a of the core 56. , 56b can enter the antenna structure 55, and reception sensitivity can be improved.

  In the present embodiment, both end portions 56a and 56b of the core 56 are brought into contact with the time character member 53 formed of a magnetic member, so that radio waves can easily enter the core 56, and the antenna structure The reception sensitivity of the radio wave in the body 55 can be improved.

  In the present embodiment, the time character member 53 is fixed to the dial plate body 52 by the two rod-shaped legs 54 and 54, but the time character member 53 is fixed to the dial plate body 52. The shape of the leg part to perform is not limited to this. For example, it is good also as a structure which provides one rectangular leg part.

  In the present embodiment, the dial main body 52 is provided with a through hole 52a so that the leg portions 54, 54 of the hour character member 53 penetrate the dial main body 52. The method of fixing to the main body 52 is not limited to this.

  Moreover, the part which contacts the both ends 56a and 56b of the core 56 is not limited to the position illustrated here. Both end portions 56a and 56b of the core 56 may be brought into contact with the back surface of the dial 51 at a position different from the position where the time character member 53 is provided.

  Further, the magnetic member that contacts the both end portions 56a and 56b of the core 56 is not limited to the hour character member 53. For example, a decorative member made of a magnetic member is provided on the dial, and both end portions 56a of the core 56 are provided thereon. , 56b may be brought into contact with each other.

  Furthermore, in the present embodiment, the case where the entire watch case 1 is formed of a metal such as stainless steel or titanium has been described as an example, but the material forming the watch case 1 is not limited to this. For example, the watch case may be configured by attaching a metal cover such as stainless steel or titanium to the surface of a plastic case. Furthermore, the watch case may be made of a non-conductive material such as a synthetic resin or ceramic, and may be made of a metal layer formed by applying a surface treatment such as metallic coating to these plastics. .

  Further, the wireless information received by the receiving device 80 is not limited to the long wave standard radio wave including time information. For example, even when receiving time information, a weak radio wave of 300 MHz band, a specific low power radio of 400 MHz band, Bluetooth (Bluetooth) of 2.4 GHz band, or the like may be used as the radio signal. Since these radio signals have high frequencies, in the case of a receiving device that receives them, the number of turns of the coil can be reduced, and the antenna structure can be reduced in size and weight.

Further, the wireless information received by the receiving device 80 is not limited to time information. For example, an IC card function may be built in the watch 1 and used to transmit and receive information such as train commuter passes and various prepaid IC cards. For example, an IC chip and an antenna may be incorporated in the exterior case so that information can be exchanged by placing a wristwatch close to a ticket gate using a smart card, an entrance / exit management machine, various billing machines, or the like. In this case, it is not necessary to insert and remove the IC card separately, and it is only necessary to bring the hand with the watch close to it, so that the operability can be greatly improved.
Therefore, the antenna built in the outer case of the present invention may be used exclusively for reception as in the case of receiving standard radio waves, or for transmitting and receiving information like a tag using a non-contact IC. These may be used, or may be used exclusively for transmission, and these may be appropriately selected according to the type of electronic timepiece to which the present invention is applied, that is, the electronic device with a built-in antenna.

  In addition, the antenna structure is not limited to the loop antenna, and other structures such as a derivative antenna may be used, which can be appropriately selected according to the type of wireless information to be transmitted or received.

In the present embodiment, the case where the receiving device 80 is mounted on the radio wristwatch 100 has been described as an example. However, the receiving device of the present invention can be applied to other than the radio wristwatch, for example, a travel watch, an alarm clock. It can be widely applied to various types of clocks such as table clocks and wall clocks. Further, in the present embodiment, the case where the radio-controlled wristwatch 100 is an analog type timepiece having the hands 14 is taken as an example. However, the radio-type wristwatch is not limited to this, and a digital type including a liquid crystal panel, an analog type And digital type may be combined.
Furthermore, the receiving device of the present invention may be mounted on a device other than a watch. For example, the receiving apparatus of the present invention can be mounted on a mobile phone, a portable terminal such as a PDA, and other various electronic devices.

  In addition, it is needless to say that the present invention is not limited to the above embodiment and can be modified as appropriate.

It is a front view which shows schematic structure of the electronic wristwatch carrying the receiver which concerns on the 1st Embodiment of this invention. It is the II-II sectional view taken on the line of FIG. It is the III-III sectional view taken on the line of FIG. It is a disassembled perspective view of the radio-controlled wristwatch shown in FIG. It is a disassembled perspective view which shows the positional relationship of the dial plate and time member shown in FIG. 1, and an antenna structure. It is the expanded sectional view of the principal part which showed the contact state of the dial plate and the edge part of a core. It is principal part sectional drawing of the electronic wristwatch which mounts the receiver concerning the 2nd Embodiment of this invention. FIG. 8 is a cross-sectional view of a main part showing a modification of the receiving device shown in FIG. 7. (A) And (b) is the expanded sectional view of the principal part which showed the modification of the contact state of a dial plate and the edge part of a core. It is the front view of the electronic wristwatch which showed the modification of the dial plate in the electronic wristwatch shown in FIG. (A) is principal part sectional drawing of the receiver mounted in the radio wave wristwatch shown in FIG. 10, (b) is principal part sectional drawing which shows the modification of (a). It is sectional drawing which shows the principal part structure of the electronic wristwatch which showed the modification of the electronic wristwatch shown in FIG. (A) is a disassembled perspective view which shows the other modification of the dial plate which comprises the electronic wristwatch shown in FIG. 12, (b) demonstrates the contact with the time character member and core which were shown to (a). (C) is a principal part expanded sectional view which expanded the contact part of the time-character member shown in (a), a dial plate, and a core.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Watch case 5 Windshield 6 Back cover 7 Module case 8 Antenna structure 9 Circuit board 10 Closing member 11 Dial 11b Insertion part 30a Left dial 30b Right dial 53 Time-of-day member 62 Module case 62a Inserting groove 63 Closing member 63a Insertion unit 80 Receiver 81 Core 81a, 81b Both ends 82 Coil 100 Radio wave watch

Claims (14)

An antenna structure including a core and a coil wound around the core;
A cylindrical conductive device main body case for housing and arranging the antenna structure,
A conductive plate member for closing one end of the cylindrical conductive device body case;
A non-conductive cover member for closing the other end of the cylindrical conductive device main body case;
A proximity member provided in proximity to the non-conductive cover member,
A receiving apparatus, wherein both ends of the core are bent toward the proximity member, and the bent portion is inserted into an insertion portion formed in the proximity member. An antenna structure including a core and a coil wound around the core;
A cylindrical conductive device main body case for housing and arranging the antenna structure,
A conductive plate member for closing one end of the cylindrical conductive device body case;
A non-conductive windshield transparent member that closes the other end of the cylindrical conductive device body case;
A dial provided in proximity to the nonconductive windshield transparent member,
A receiving apparatus, wherein both ends of the core are bent toward the dial, and the bent portions are inserted into insertion portions formed on the dial. An antenna structure including a core and a coil wound around the core;
A cylindrical conductive device main body case for housing and arranging the antenna structure,
A conductive plate member for closing one end of the cylindrical conductive device body case;
A non-conductive windshield transparent member that closes the other end of the cylindrical conductive device body case;
The dial provided in proximity to the non-conductive windshield transparent member, and a parting member provided on the outer periphery of the dial,
A receiving apparatus, wherein both ends of the core are bent toward the parting member, and the bent part is inserted into an insertion part formed in the parting member. Further comprising at least two magnetic members provided on a portion of the proximity member facing the non-conductive cover member;
The receiving apparatus according to claim 1, wherein both end portions of the core are in magnetic contact with the at least two magnetic members via the insertion portion. The dial further includes at least two magnetic members provided on a part of the dial plate facing the non-conductive transparent windshield member;
The receiving apparatus according to claim 2, wherein both end portions of the core are in magnetic contact with the at least two magnetic members via the insertion portion.   The receiving apparatus according to claim 5, wherein the magnetic member is a plurality of time character members provided on an outer periphery on the dial. The receiving device according to any one of claims 1 to 6,
A band for mounting the cylindrical conductive device main body case on a part of a user's body;
A radio-controlled timepiece characterized by comprising: An antenna structure including a core and a coil wound around the core;
A cylindrical conductive device main body case for housing and arranging the antenna structure,
A conductive plate member for closing one end of the cylindrical conductive device body case;
A non-conductive cover member for closing the other end of the cylindrical conductive device main body case;
A proximity member provided in proximity to the non-conductive cover member,
A receiving apparatus, wherein both ends of the core are bent toward the proximity member, and the bent portion is brought into contact with a surface of the proximity member on the conductive plate member side. An antenna structure including a core and a coil wound around the core;
A cylindrical conductive device main body case for housing and arranging the antenna structure,
A conductive plate member for closing one end of the cylindrical conductive device body case;
A non-conductive windshield transparent member that closes the other end of the cylindrical conductive device body case;
A dial provided in proximity to the nonconductive windshield transparent member,
A receiving apparatus, wherein both ends of the core are bent toward the dial plate, and the bent portions are brought into contact with a surface of the dial plate on the conductive plate member side. An antenna structure including a core and a coil wound around the core;
A cylindrical conductive device main body case for housing and arranging the antenna structure,
A conductive plate member for closing one end of the cylindrical conductive device body case;
A non-conductive windshield transparent member that closes the other end of the cylindrical conductive device body case;
The dial provided in proximity to the non-conductive windshield transparent member, and a parting member provided on the outer periphery of the dial,
A receiving apparatus, wherein both ends of the core are bent toward the parting member, and the bent part is brought into contact with a surface of the parting member on the side of the conductive plate member. Further comprising at least two magnetic members provided on a portion of the proximity member facing the non-conductive cover member;
The receiving device according to claim 8, wherein both end portions of the core are arranged to face the at least two magnetic members via the non-conductive cover member. The dial further includes at least two magnetic members provided on a part of the dial plate facing the non-conductive transparent windshield member;
The receiving device according to claim 9, wherein both end portions of the core are in magnetic contact with the at least two magnetic members via the insertion portion.   The receiving device according to claim 12, wherein the magnetic member is a plurality of time-character members provided on an outer periphery of the dial. A receiving device according to any one of claims 8 to 13,
A band for mounting the cylindrical conductive device main body case on a part of a user's body;
A radio-controlled timepiece characterized by comprising:

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