JP4821882B2 - Electronics - Google Patents

Description

  The present invention relates to an electronic device.

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

  In the antenna structure, the reception sensitivity is improved as the length of the core is longer and the radio wave reception area is larger. However, especially when incorporated in a small electronic device such as a wristwatch-type radio timepiece, there is a limit to the storage space for the antenna structure, and thus it is necessary to use a small antenna structure.

  Therefore, as a configuration for improving reception sensitivity even when the antenna structure is downsized, a configuration in which a core is formed by stacking a plurality of plate-like members such as amorphous thin films has been proposed (for example, see Patent Document 1).

JP 2008-141389 A

  However, the technique described in Patent Document 1 has a configuration in which a plurality of plate-like members constituting the core are stacked in the thickness direction of the circuit board and the timepiece module member. For this reason, when the antenna structure is disposed along a straight line formed outside the side edge of the circuit board (see FIGS. 9 and 10 of Patent Document 1), the horizontal width of each plate-like member Needed extra space. As a result, the antenna structure cannot be efficiently arranged in a limited space of a main body case of a small electronic device such as a watch case, and a wide space for housing the antenna structure must be secured. Don't be.

In this regard, for example, when an electronic device such as a wristwatch is provided with a liquid crystal panel as a display means, the liquid crystal panel can be improved so that various information such as time, date, day of the week, etc. can be displayed. It is preferable to increase the display area as much as possible.
However, if a large space is required to accommodate the antenna structure, it is necessary to reduce the size of the liquid crystal panel or the watch case itself, thereby increasing the display area and downsizing the electronic device. There is a problem that it is difficult to achieve both.

  Therefore, the present invention has been made in view of the circumstances as described above, and an electronic device that has a high reception sensitivity and can ensure both a large display area and a reduction in the size of the entire apparatus by a simple method. It is intended to provide.

In order to solve the problem, an electronic device according to claim 1 is provided.
A circuit board, a liquid crystal panel stacked on the circuit board, a module case of arranging the liquid crystal panel and the circuit board therein, in the electronic apparatus including an antenna structure,
The antenna structure is
It consists of a plurality of plate-like members laminated in a direction orthogonal to the lamination direction of the circuit board and the liquid crystal panel , the central part is linear, and both ends are along the outer peripheral surface of the module case A core bent into a shape ,
Of this core , comprising a coil wound around a linear center part ,
The first linear portion formed at one end of the side of the circuit board and the second linear portion formed at one end of the side of the liquid crystal panel are arranged to face each other, while the antenna In the structure , the linear central portion is disposed laterally to each of the first and second straight portions, and is arranged along the first and second straight portions, and the core Both end portions of the module case are arranged along the outer peripheral surface of the module case .

The invention according to claim 2 is the electronic device according to claim 1,
2. The circuit board according to claim 1, wherein the circuit board is formed in a disc shape, and a cutout portion constituting the linear portion is provided at one end of the side portion.

The invention according to claim 3 is the electronic device according to claim 1 or 2,
The antenna structure is connected to the circuit board via a lead member,
The lead member also serves as a holding member that holds the antenna structure against the circuit board.

Moreover, the invention according to claim 4 is the electronic device according to any one of claims 1 to 3,
The antenna structure includes a core case that holds the core.
The invention according to claim 5 is the electronic device according to any one of claims 1 to 4,
A module member for holding the circuit board and the liquid crystal panel is disposed at an upper position and / or a lower position in the stacking direction with the liquid crystal panel in the circuit board,
A support portion for supporting the antenna structure is provided at an outer peripheral end of the module member.

According to the present invention, the first linear portion formed at one end of the circuit board and the second linear portion formed at one end of the liquid crystal panel are arranged so as to face each other. Thus, the antenna structure having a core composed of a plurality of plate-like members stacked in a direction orthogonal to the stacking direction of the circuit board and the liquid crystal panel has a linear central portion in each of the first and second straight lines. The circuit is arranged at the lateral position of the part and along the first and second straight line parts, and the both ends of the core are bent into a shape along the outer peripheral surface of the module case. The antenna structure including the core and the coil can be compactly accommodated in the space both in the stacking direction of the substrate and the liquid crystal panel and in the direction orthogonal to the stacking direction of the circuit board and the liquid crystal panel . For this reason, there is an effect that a large display area of the liquid crystal panel laminated on the circuit board can be secured without increasing the size of the electronic device.

It is a front view which shows schematic structure of the radio wave wristwatch which is an example of the electronic device which concerns on this invention. FIG. 2 is a cross-sectional view of the radio wrist watch shown in FIG. 1 taken along the line II-II. It is a disassembled perspective view which shows the internal structure of the radio-controlled wristwatch shown in FIG. It is a disassembled perspective view which shows the structure of the antenna structure provided in the radio wave wristwatch shown in FIG. It is the bottom view seen from the lower side at the time of incorporating the antenna structure shown in FIG. 4 in a radio wave wristwatch. It is the top view seen from the upper side at the time of incorporating the antenna structure shown in FIG. 4 in a radio wave wristwatch. FIG. 7 is a cross-sectional view taken along line VII-VII in FIG. 5. It is the top view seen from the lower side at the time of incorporating the state which attached the antenna structure to the circuit board in the radio wave wristwatch. It is the top view seen from the upper side at the time of incorporating the state which attached the antenna structure to the circuit board in the radio wave wristwatch. It is a top view which shows the state which incorporated the antenna structure and the circuit board in the module member. It is a top view which shows the positional relationship of an antenna structure, a circuit board, and a liquid crystal panel.

  Hereinafter, preferred embodiments of an electronic apparatus according to the present invention will be specifically described with reference to the drawings. The scope of the present invention is not limited to the illustrated example.

  An embodiment of an electronic apparatus according to the present invention will be described with reference to FIGS. In the present embodiment, the case where the electronic device is a radio wave wristwatch equipped with an antenna structure will be described as an example.

  FIG. 1 is a front view showing a radio-controlled wristwatch according to the present embodiment. 2 is a cross-sectional view taken along the line II-II in FIG. 1, and FIG. 3 is an exploded perspective view showing the internal configuration of the radio-controlled wristwatch in FIG.

As shown in FIG. 3, the radio-controlled wristwatch 100 is provided with a main body case (hereinafter referred to as “watch case 1”) formed in a short column shape. The watch case 1 is formed of a metal such as stainless steel or titanium or another conductive member.
The inside of the watch case 1 has a hollow shape whose upper and lower sides are open, and this hollow portion serves as a storage portion that provides a storage space for storing various components.

Band attachment portions 12 are formed at both upper and lower ends of the watch case 1 in FIG. 1, and a watch band (not shown) is attached to each band attachment portion 12.
In addition, a plurality of operation buttons 13 for inputting various operation instructions such as a time setting instruction are provided on the outer periphery of the watch case 1.
Further, as shown in FIGS. 2 and 3, an inner frame is formed on the inner side of the watch case 1 along the inner peripheral wall so as to prevent the members inside the watch case 1 from rattling and to absorb external impacts. A member 16 is provided.

As shown in FIG. 2, on the viewing side (front side: the upper side in FIG. 2) of the watch case 1, a transparent made of glass which is a non-conductive transparent material so as to close the opening on the viewing side. A watch glass member 3 as a member is mounted via a waterproof ring 14.
A dial 18 having a frame corresponding to display by the liquid crystal panel 5 described later is provided below the watch glass member 3.
A thin-film solar cell 17 is disposed between the watch glass member 3 and the dial 18.

  Further, on the side opposite to the viewing side of the watch case 1 (the back side: the lower side in FIG. 2), as shown in FIG. 2, the back as a closing member for closing the lower opening of the watch case 1 is provided. The lid member 2 is attached via a waterproof ring 15. The back cover member 2 is formed of, for example, a metal such as stainless steel or titanium or other conductive members.

The watch case 1 is electrically connected to the circuit board 6 on which various electronic components 63 are mounted, the liquid crystal panel 5 stacked on the upper side (viewing side) of the circuit board, and the circuit board 6. An antenna structure 7 is provided.
The liquid crystal panel 5, the circuit board 6, and the antenna structure 7 are housed and held in a module case and disposed inside the watch case 1. The module case (module member) is made of, for example, a non-metallic material such as a resin, and includes a first module member 41 and a second module member 42.

The first module member 41 is a frame-like member positioned on the viewing side of the watch case 1 and has an opening 41a (see FIG. 3) into which the liquid crystal panel 5 is fitted. The liquid crystal panel 5 is fitted on the opening 41a while being laminated on the circuit board 6, and the display area (display area 50 shown in FIG. 11) is exposed to the dial 18 side.
The second module member 42 is a dish-like member located on the back side of the watch case 1 and includes a battery storage unit (not shown).

The first module member 41 and the second module member 42 are structured to fit each other, and form a module case as a unit.
Further, the first module member 41 and the second module member 42 include an antenna support portion 411 that supports the antenna structure 7 on the outer peripheral end that is the upper side in FIG. 1 when the module case is housed in the watch case 1. 422 (see FIGS. 10 and 11) are provided.

  A liquid crystal panel 5 and a circuit board 6 are stacked inside the module case constituted by the first module member 41 and the second module member 42. The liquid crystal panel 5 and the circuit board 6 are The first module member 41 and the second module member 42 are sandwiched and held from the upper part and the lower part.

The first module member 41 and the second module member 42 are fixed by the circuit pressing member 8 with the liquid crystal panel 5 and the circuit board 6 sandwiched therebetween, and further, the radio wave wristwatch by the module pressing member 9 (see FIG. 2). It is supported from the back side of 100 and is fixed in the watch case 1.
The circuit pressing member 8 and the module pressing member 9 are not indispensable constituent elements. For example, the module case integrated by the locking means or the like without the circuit pressing member 8 and the module pressing member 9 is provided as the back cover member. 5 may be supported.

The liquid crystal panel 5 includes, for example, a liquid crystal substrate 51 in which a liquid crystal substance is sealed between two glass plates, and a pair of polarizing plates 52 provided so as to sandwich the liquid crystal substrate 51 from above and below in FIG. A backlight 53 disposed below the liquid crystal substrate 51 and the polarizing plate 52. The backlight 53 includes, for example, an EL (electro-luminescence) element. The configuration, shape, etc. of the liquid crystal panel 5 are not particularly limited.
A side portion of the liquid crystal panel 5 that faces the antenna support portions 411 and 422 when the liquid crystal panel 5 is housed in the module case is a straight portion 5a (see FIG. 3).

  In the present embodiment, the circuit board 6 is formed in a substantially disk shape as shown in FIGS. A straight part 6a (see FIG. 3) that is a notch is formed at one end of the side part of the circuit board 6 and corresponding to the antenna support parts 411 and 422 when the circuit board 6 is housed in the module case. Is formed.

The antenna structure 7 is disposed along the straight line portions 5a and 6a at positions outside the respective side ends of the straight line portion 5a of the liquid crystal panel 5 and the straight line portion 6a of the circuit board 6 (see FIG. 11).
In this way, the core 71 composed of a plurality of plate-like members 71 a laminated in the direction orthogonal to the laminating direction of the liquid crystal panel 5 and the circuit board 6 along the linear portions 5 a and 6 a of the liquid crystal panel 5 and the circuit board 6 is provided. By disposing the antenna structure 7 provided, the antenna structure 7 can be stored compactly without wasting space in the horizontal plane direction of the liquid crystal panel 5 and the circuit board 6.

A pair of locking terminals 61 for locking the lead member 77 of the antenna structure 7 is provided on one surface of the circuit board 6 on the back surface side and in the vicinity of the linear portion 6a.
In addition, a plurality of liquid crystal panel terminals 62 are provided along the straight line portion 6a in the vicinity of the straight line portion 6a on the viewing side surface of the circuit board 6.
In addition, the circuit board 6 receives, for example, a control IC such as a CPU that controls each part of the radio wave wristwatch 100 and an electric signal detected by the antenna structure 7 to amplify and demodulate the time signal included in the standard radio wave. Various electronic components 63 such as a clock circuit (not shown) that has a circuit and an oscillator and clocks the current time are mounted.

Here, the antenna structure 7 in the present embodiment will be specifically described with reference to FIGS. 4 to 7.
FIG. 4 is an exploded perspective view of the antenna structure 7. 5 is a bottom view of the antenna structure 7 as viewed from the lower side (side on which the back cover member 2 is provided) when the antenna structure 7 is incorporated in the radio-controlled wristwatch 100. FIG. 6 shows the antenna structure. FIG. 7 is a top view as seen from the upper side (the side on which the dial 18 is provided) when the body 7 is incorporated in the radio-controlled wristwatch 100. FIG. It is line sectional drawing.

  As shown in FIG. 4, the antenna structure 7 in the present embodiment includes a long core 71 and a coil 72 wound around the core 71. When radio waves are transmitted through the core 71, an induced current flows through the coil 72. Is configured to occur.

  The core 71 is formed of a plurality of plate-like members 71 a laminated in a direction orthogonal to the lamination direction of the circuit board 6 and the liquid crystal panel 5. The number of plate-like members 71a constituting the core 71 is not particularly limited. Note that the plurality of plate-like members 71a are preferably fixed to each other with an adhesive or the like so that the laminated state can be maintained.

Each plate-like member 71a has a magnetic permeability of an amorphous alloy 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) Alternatively, it is made of a magnetic material having a high relative magnetic permeability (ratio to the vacuum magnetic permeability μ0 μs = μ / μ0).
The material for forming the core 71 is not limited to an amorphous alloy, and any magnetic material that can be formed into a thin plate shape is applicable.

  As shown in FIG. 4, the central portion of the core 71 is formed in a straight line and is a winding portion around which the coil 72 is wound. Further, both end portions of the core 71 protruding from both ends of the coil 72 are bent in a shape along the outer peripheral surfaces of the first module member 41 and the second module member 42.

In the present embodiment, the antenna structure 7 includes a core case 73 (see FIG. 3) that holds the core 71.
As shown in FIG. 4, the core case 73 includes a pair of first case members 74 a and 74 b that cover both ends of the core 71, and a second case member 75 that covers the winding portion around which the coil 72 is wound. And is made of resin or the like.

  The first case members 74a and 74b are preferably integrally molded in a state where they are connected to each other by a runner (not shown), for example, using a resin or the like. In this case, the runner is cut after the first case members 74 a and 74 b are put on the core 71.

A pair of lead members 77 is placed on the first case members 74 a and 74 b on the surface which becomes the back side when the antenna structure 7 is housed in the watch case 1. Are provided with a lead receiving recess 743 and a locking projection 741 that engages with the locking hole 771 of the lead member 77.
The first case members 74a and 74b are formed with a core insertion groove 742 (see FIG. 6) into which the core 71 is inserted on the side that becomes the visual recognition side when the antenna structure 7 is housed in the watch case 1. ing.
Furthermore, an engaging portion 744 that engages with the second case member 75 is provided on the surface of the first case members 74 a and 74 b that faces the coil 72.

As shown in FIG. 5, in the present embodiment, an example is shown in which the lead member 77 is placed on the first case member 74 a side. However, depending on the pattern configuration of the circuit board 6, the first case member The lead member 77 may be placed on the 74b side.
In the present embodiment, the lead receiving recesses 743 and the locking projections 741 are formed on both the pair of first case members 74a and 74b, and on either side according to the pattern configuration of the circuit board 6 or the like. Although the lead member 77 can be connected, the lead receiving recess 743 and the locking projection 741 may be provided only in one of the pair of first case members 74a and 74b. .

  The pair of lead members 77 mounted on the first case member 74a are fitted into the lead receiving recesses 743, and the locking hole portions 771 are engaged with the locking projection portions 741 so as to be placed on the first case member 74a. Fixed. The lead member 77 may be further fixed with an adhesive or the like.

Each of the lead members 77 includes a winding connection portion 772 to which one end of the coil 72 is connected. One end of the lead member 77 is soldered to the antenna terminal 61 on the circuit board 6. Connected.
Thus, when the end of the coil 72 is connected to the winding connection 772 of the lead member 77, the antenna structure 61 is provided on the circuit board 6 via the lead member 77 (see FIG. 8) and the signal obtained by the antenna structure 7 is sent to the receiving circuit on the circuit board 6.

FIG. 8 shows the state in which the antenna structure 7 is connected to the circuit board 6 from the back side of the circuit board 6 (that is, the back cover member 2 side when the antenna structure 7 is housed in the watch case 1). FIG. 9 shows a state in which the antenna structure 7 is connected to the circuit board 6 from the front side of the circuit board 6 (that is, the viewing side when the antenna structure 7 is housed in the watch case 1). FIG.
As shown in FIG. 8, in this embodiment, the antenna structure 7 is fixed to the circuit board 6 by a lead member 77, and the lead member 77 is a holding member that holds the antenna structure 7 on the circuit board 6. Also serves as.

  The second case member 75 is a U-shaped member having substantially the same length as the winding portion around which the coil 72 is wound, and has a bottom surface side opening 751 extending in the longitudinal direction on the bottom surface portion. Yes. The width dimension of the bottom surface part is formed slightly larger than the thickness of the winding part, and the first case member 74a is sandwiched between the pair of side wall parts 752 erected from the bottom surface part. , 74b (ie, the viewing side when the antenna structure 7 is housed in the watch case 1) is covered with the winding portion. Both side surfaces of the second case member 75 are side surface openings 753, and the engagement portions 744 of the first case members 74a and 74b are engaged with the side surface openings 753, respectively.

Next, the operation of the radio-controlled wristwatch 100 according to this embodiment will be described.
First, when forming the radio-controlled wristwatch 100, a plurality of plate-like members 71a are stacked and fixed with an adhesive or the like, and the end portion is bent to form the core 71. Then, the first case members 74a and 74b connected to each other by the runners are put on both ends of the core 71, and then the runners of the first case members 74a and 74b are cut. Thus, by attaching the first case members 74a and 74b to the core 71 and then separating the runner, positioning is easy and convenient.

Next, the coil 71 is formed by winding the central portion of the core 71. In addition, in order to fix the wound coil 72, you may perform the process of impregnating an adhesive agent.
The lead member 77 is attached to the first case member 74 a and the winding start and winding end portions of the coil 72 are connected to the winding connection portions 772 of the pair of lead members 77, respectively.
Further, the second case member 75 is mounted on the winding portion of the coil 72 from the opposite side to the mounting direction of the first case members 74a and 74b. At this time, the engaging portions 744 of the first case members 74 a and 74 b engage with the side surface side opening portions 753 of the second case member 75, respectively. Thereby, the first case members 74a and 74b and the second case member 75 are integrated to complete the antenna structure 7 including the core case 73.

  Next, the antenna structure 7 is disposed along the straight portions 5 a and 6 a of the liquid crystal panel 5 and the circuit board 6. Then, the lead member 77 is electrically connected to the antenna terminal 61 of the circuit board 6 by soldering or the like. Then, the liquid crystal panel 5 is laminated on the circuit board 6 to which the antenna structure 7 is connected, and is sandwiched between the first module member 41 and the second module member 42, so that the first module member 41 and the second module member are sandwiched. 42 is engaged and fixed by the circuit pressing member 8 to be integrated.

FIG. 10 shows the position of the antenna structure 7 in the module case by cutting out one end of the module case integrated in this way. FIG. 11 shows the antenna structure 7 and the circuit board 6. 2 is a diagram schematically showing a positional relationship between the liquid crystal panel 5 and the liquid crystal panel 5. FIG.
As shown in FIGS. 10 and 11, the antenna structure 7 is supported by the antenna support portions 411 and 422 of the first module member 41 and the second module member 42 so as not to rattle in the module case. Yes.

Here, the difference between the case of the configuration of the present embodiment and the conventional radio-controlled wristwatch will be described.
In the conventional antenna structure, a plurality of plate-like members constituting the core are laminated in the same direction as the lamination direction of the circuit board, the watch module member, or the liquid crystal panel. Since a wide space is required for the plate width in the horizontal direction of the plate-like member, the space in the horizontal direction is limited in the display area of the liquid crystal panel.

  On the other hand, in the configuration of the present embodiment, a plurality of layers stacked in a direction perpendicular to the stacking direction of the liquid crystal panel 5 and the circuit board 6 along the straight line portions 5a and 6a of the liquid crystal panel 5 and the circuit board 6 are provided. Since the antenna structure 7 having the core 71 made of the plate-like member 71a is disposed, the space in the horizontal plane direction of the liquid crystal panel 5 and the circuit board 6 can be eliminated and the antenna structure 7 can be stored compactly. For this reason, the display area 50 of the liquid crystal panel 5 is in a range indicated by a solid line in FIG. 11, and can be widened by a range indicated by hatching (area α in FIG. 11) as compared with the conventional display area. .

  When the circuit board 6, the liquid crystal panel 5, and the antenna structure 7 are stored in the module case, the module case is stored in the watch case 1 and fixed by the module pressing member 9 from the back side. Further, the back cover member 2 is fitted into the opening on the back side of the watch case 1 to close the opening on the back side. Thereby, the radio-controlled wristwatch 100 is completed.

When receiving a standard radio wave by the radio wave wristwatch 100, the magnetic field component of the radio wave is transmitted through the watch glass member 3, the dial 18 and the like, which are non-conductive members made of a material that does not shield the radio wave, and the antenna structure. 7 core 71 is entered. The magnetic flux that has entered the antenna structure 7 from one side of the core 71 passes to the end of the other side of the core 71. During this passage, an alternating current is induced in the coil 72 wound around the core 71 (induced current), and an alternating voltage is generated at both ends of the coil 72 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 core 71 of the antenna structure 7 is formed by laminating the plurality of plate-like members 71 a so as to overlap in the direction orthogonal to the laminating direction of the circuit board 6 and the liquid crystal panel 5. Since the coil 72 is wound around the central portion of the long core 71 in a direction perpendicular to the longitudinal direction of the core 71, the core 71 and the like can be made compact in a limited space. Can be installed.
In addition, linear portions 5a and 6a are formed at one end of the side of the circuit board 6 and the liquid crystal panel 5 laminated thereon, and the antenna structure 7 is arranged so that the one end is in contact with the linear portions 5a and 6a. Yes. For this reason, the circuit board 6 and the liquid crystal panel 5 and the antenna structure 7 can be arranged side by side without protruding from the module case. For this reason, the display area 50 of the liquid crystal panel 5 can be made wider than before, and various displays such as improved visibility and various function displays can be handled.

  In addition, since the long core 71 in which the plurality of plate-like members 71a are stacked is provided, the magnetic flux can be efficiently collected, the reception sensitivity is good, and the small radio-controlled wristwatch 100 can be realized. .

  Further, even when the core 71 in which such a plurality of plate-like members 71 a are stacked is used, the core case 73 that holds the core 71 is provided. It is possible to avoid the risk of a short circuit due to contact with the electronic component 63 or the like.

  The antenna structure 7 is connected to the circuit board 6 only by the lead member 77, and the lead member 7 also serves as a holding member for holding the antenna structure 7 on the circuit board 6. Therefore, the antenna structure is separately provided. There is no need to provide a member for fixing 7. For this reason, it is possible to reduce the number of parts and reduce the cost, and it is possible to easily assemble with fewer assembly steps.

  In addition, antenna support portions 411 and 422 that support the antenna structure 7 are provided at the outer peripheral ends of the first module member 41 and the second module member 42, and the antenna structure 7 is supported by the antenna support portions 411 and 422. Therefore, even when the antenna structure 7 is connected to the circuit board 6 only by the lead member 77, rattling of the antenna structure 7 can be suppressed and stabilized.

  Needless to say, the present invention is not limited to each of the embodiments described above, and can be modified as appropriate.

For example, in the present embodiment, the antenna structure 7 is configured such that the lead member 77 provided on the first case member 74 a also serves as a holding member, and the antenna structure 7 is held on the circuit board 6 only by the lead member 77. However, the configuration for holding the antenna structure 7 on the circuit board 6 is not limited to this.
For example, the antenna structure 7 may be held at two locations by providing a member having the same shape as the lead member on the first case member 74b side as a holding member and fixing the holding member on the circuit board 6. Good. In this case, electrical contact is prevented from occurring between the holding member provided on the first case member 74 b side and the circuit board 6. In this case, the holding member that is not used as the connection terminal may be used as the ground.

  Moreover, although the core case 73 demonstrated the example comprised from the 1st case members 74a and 74b and the 2nd case member 75 in this embodiment, the structure of the core case 73 is not limited to this. For example, the core case 73 may be configured only by the first case members 74 a and 74 b that cover the end of the core 71.

Moreover, in this embodiment, although the module case (module member) shall be comprised from the 1st module member 41 and the 2nd module member 42, the structure of a module member is not limited to this. For example, you may be comprised only from the member holding the circuit board 6 and the liquid crystal panel 5 from the back surface side (the back cover member 2 side).
Moreover, although the antenna support parts 411 and 422 are provided in both the first module member 41 and the second module member 42, the antenna support parts 411 and 422 are provided in only one of them. It is good.

  Moreover, in this embodiment, after laminating | stacking the several plate-shaped member 71a, the both ends are bent by the shape which follows the shape of the outer periphery of the 1st module member 41 and the 2nd module member 42, and antenna structure Although the core 71 of the body 7 is configured, the configuration of the core 71 is not limited to that illustrated here. For example, a core may be formed by laminating a plurality of plate members bent in advance.

  Further, in the present embodiment, the case where the watch case 1 is formed in a circular shape is taken as an example, but the shape of the watch case 1 is not limited to this, and may be, for example, a quadrangle or a polygon. It is preferable that the antenna structure 7 has a shape along these shapes so that the storage space inside the watch case 1 can be secured as wide as possible.

In the present embodiment, the case where the circuit board 6 has a substantially disk shape has been described as an example. However, the shape of the circuit board 6 is not limited to that shown in the present embodiment. When the shape of the circuit board 6 is a quadrangular shape or the like, one end of any one of the side portions may be used as a straight portion, and it is not necessary to provide a notch portion.
Further, the shape of the liquid crystal panel 5 and the layout of the dial 18 are not limited to the illustrated example.
In addition, the solar cell 17 is not an essential component and may be configured without this.

  Moreover, as a synthetic resin which forms the 1st module member 41, the 2nd module member 42, etc., you may use an epoxy resin, ABS resin etc., for example, points, such as heat resistance, dimensional stability, and intensity | strength among these. Phenol resin, epoxy resin and the like are preferable.

  Further, in the present embodiment, the case where the electronic device to which the antenna structure is applied is a radio wave watch, but the electronic device to which the antenna structure can be applied is not limited to this, and the antenna structure is not limited to this. Any configuration that receives radio waves may be used. For example, the antenna structure may be applied to a stationary radio timepiece, a small radio, a portable terminal, or the like.

  Of course, the present invention is not limited to the above embodiment.

1 Watch case (body case)
DESCRIPTION OF SYMBOLS 3 Watch glass member 5 Liquid crystal panel 5a Linear part 6 Circuit board 6a Linear part 7 Antenna structure 18 Dial 41 First module member 42 Second module member 62 Antenna mounting part 63 Magnetic member mounting part 65 Magnetic member 66 Magnetic flux collecting member mounting Part 67 Magnetic collecting member 71 Core 72 Coil 73 Core case 74a, b First case member 75 Second case member 77 Lead member 100 Radio wave watch (electronic device)

Claims (5)

A circuit board, a liquid crystal panel stacked on the circuit board, a module case of arranging the liquid crystal panel and the circuit board therein, in the electronic apparatus including an antenna structure,
The antenna structure is
It consists of a plurality of plate-like members laminated in a direction orthogonal to the lamination direction of the circuit board and the liquid crystal panel , the central part is linear, and both ends are along the outer peripheral surface of the module case A core bent into a shape ,
Of this core , comprising a coil wound around a linear center part ,
The first linear portion formed at one end of the side of the circuit board and the second linear portion formed at one end of the side of the liquid crystal panel are arranged to face each other, while the antenna In the structure , the linear central portion is disposed laterally to each of the first and second straight portions, and is arranged along the first and second straight portions, and the core Both ends of the electronic device are arranged along the outer peripheral surface of the module case .   The electronic device according to claim 1, wherein the circuit board is formed in a disk shape, and a notch portion that forms the linear portion is provided at one end of the side portion. The antenna structure is connected to the circuit board via a lead member,
The electronic device according to claim 1, wherein the lead member also serves as a holding member that holds the antenna structure against the circuit board.   The electronic device according to any one of claims 1 to 3, wherein the antenna structure includes a core case that holds the core. A module member for holding the circuit board and the liquid crystal panel is disposed at an upper position and / or a lower position in the stacking direction with the liquid crystal panel in the circuit board,
5. The electronic apparatus according to claim 1, wherein a support portion that supports the antenna structure is provided at an outer peripheral end of the module member.

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