JP2000353910A - Antenna structure for arm information apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an arm information apparatus of which antenna has a large open area without increasing the thickness or size. SOLUTION: A packing member 11c is mounted on the outer periphery of a connecting member 11a of a first antenna member 1a at an outside 10a of a case 10 exposed to outside air and second and third antenna members 1b and 1c at an inside 10b of the case 10, and a screw 11b is fixed to the connecting member 11a so that the electric connection of the first antenna member 1a at the outside 10a of the case 10 with the second and third antenna members 1b and 1c at the inside 10b of the case 10 can be realized, and simultaneously a water preventing structure between the case 10 and the connecting member 11 can be realized by the packing member 11e. Also, after the electric connection of the first antenna member 1a with the second and third antenna members 1b and 1c is operated by the screw 11b, a decorative bezel member 2 is fixed to a case body 3 by a screw 2a so that the first antenna member 1a arranged at the outside 10a of the case 10 can be covered.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an antenna structure of an arm information device for receiving or transmitting information using an antenna.

[0002]

2. Description of the Related Art As a conventional antenna structure of an arm information device, a structure in which a band portion is used as an antenna is disclosed in Japanese Patent Application Laid-Open No. 63-252002.
1 having an axis parallel to the back cover as disclosed in
A structure in which a coil-type antenna having more than one winding is disposed in a case is disclosed. FIGS. 6 and 7 are a plan view and a cross-sectional view of a wrist information device showing another embodiment of the related art.
3 shows a structure in which a z-band loop antenna is arranged in a case. FIG. 7 is a cross-sectional view in the direction of arrow A in FIG.

[0006] Reference numeral 61 denotes a loop type antenna. The antenna terminals 61 a and 61 b are connected to the R-
By being soldered to the F board 62, it is electrically connected to the RF board 62. Reference numeral 63 denotes a trimmer capacitor for fine adjustment of the antenna circuit.

Reference numeral 65 denotes a display substrate for driving the liquid crystal cell 66. The RF substrate 62 and the display substrate 65 are composed of female connectors 67a, 67b, 67c and male connectors 68a, 6c.
8b and 68c (not shown) are electrically connected to each other to form a drive circuit of the arm information device 60.

[0005] 69 is a crystal oscillator, 70 is a decoder IC,
71 is a shield plate, and 73 is a liquid crystal cell support frame. The liquid crystal cell 66 and a rubber connector (not shown) are dropped into the liquid crystal cell support frame 73, the display substrate 65 is overlaid, and the screws 7
The shield of the decoder IC 70 and the electrical connection between the display substrate 65 and the liquid crystal cell 66 are made by fixing the shield plate 71 to the liquid crystal cell support frame 73 by using 2.

Reference numeral 81 denotes a case body, on which a plastic windshield 83 with a cut-off printed on the lower surface is welded, and a decorative bezel 84 is also welded. Also, 8
Reference numeral 2 denotes a back cover, which is fixed to the case body 81 while compressing the packing 85 with a back cover set screw (not shown).
And a waterproof structure. A battery 74 is provided with a waterproof structure by fitting a battery cover (not shown) to the back cover, so that power is supplied.

The sensitivity of the loop antenna 61 in the arm information device 60 is determined by the opening 61c of the antenna 61 shown in FIG.
Is greater than the product of the width W and the height H, that is, the area (opening area) of the opening 61c, and the sensitivity increases as the opening area of the opening 61c increases. The required opening area has a relationship inversely proportional to the frequency used. From this relationship, 900M
The conventional arm information device 60 using a loop-type antenna in the Hz band is an example of a device that uses a high frequency band and does not require much sensitivity. The opening area of the antenna 61 may be small, and the antenna information device 60 may be very small. It is possible to configure, and the volume occupied in the case is small.

However, information devices that are used by users in a wide area are required to have higher sensitivity. For example, a caller charging receiver (pager) in the 300 MHz band requires about three times the aperture area of the antenna as compared with the arm information device 60, and further increases the sensitivity for a multi-area service by a conventional receiver. Since 2 dB or more is required, a further increase in the opening area is required.

[0009]

That is, in order to improve the sensitivity of the arm information device 60, it is necessary to increase the opening area of the antenna 61. To increase the opening area, it is necessary to increase the thickness of the case. However, there is a drawback that the size of the case is either increased or the size becomes unacceptable as a portable device.

Japanese Patent Application Laid-Open No. Sho 6
There is also a method of selecting a structure in which a band portion is used as an antenna in Japanese Patent Application Laid-Open No. 3-252002, but there is a drawback that a carrier cannot freely select a band. In addition, the band is a consumable item, and depending on how it is used, it may be necessary to replace it in about one year. However, the antenna must be adjusted every time the band is replaced. Since it cannot be used, a period during which it cannot be used occurs, and there is a disadvantage that the user is inconvenienced. Further, since the structure of the portion for electrically connecting the inside of the case and the band is complicated, there is a disadvantage that sufficient waterproof performance cannot be obtained.

In a structure in which one or more coil-type antennas having an axis parallel to the back cover are arranged in a case as disclosed in Japanese Patent Laid-Open No. 22593/1990, the antenna is divided into two parts and reversible. Because it is connected at the sexual connection part,
The electrical resistance of the connection has a nonnegligible level, and has the disadvantage of deteriorating the sensitivity. Furthermore, in order to increase the opening area of the antenna, the antenna is integrated with the case, such as by burying a part of the antenna in the case, so when the antenna is defective, the case is discarded. There was a drawback that only an unreproducible structure that sometimes destroys the antenna could be obtained.

An object of the present invention is to provide a highly sensitive arm information device having a waterproof structure, in which an antenna can be easily replaced without increasing the size of a case.

[0013]

The gist of the present invention to achieve the above object is to provide an arm information device for receiving or transmitting information by using an antenna. It is characterized by being arranged outside the case of the device.

Further, a waterproof structure of the case is formed by attaching a packing member to a connection member between the antenna member outside the case and the antenna member inside the case.

Further, the antenna member outside the case is covered with a decorative bezel member.

The antenna includes a first antenna member disposed outside the case, and a second antenna member electrically connected to the first antenna member and connected to one antenna feed port. And a third antenna member electrically connected to the first antenna member and connected to the other power supply port.

The antenna is an antenna having two ring shapes, and one of the ring-shaped antenna members is arranged outside the case.

[0018]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the antenna structure of the arm information device according to the present invention will be described below in detail with reference to the accompanying drawings. FIG. 2 is a plan view of the arm information device showing one embodiment of the present invention, and shows an example of the appearance of the arm information device.

Reference numeral 1 denotes an antenna of the arm information device 20. In this embodiment, a case of a ring-shaped loop antenna is shown.
A liquid crystal cell 7 is arranged inside the inner diameter of the ring of the antenna 1, and the liquid crystal cell 7 can digitally display time, received information received using the antenna 1, and the like. Reference numeral 2 denotes a decorative bezel for improving the design of the arm information device 20. The presence of the antenna 1 is obscure by covering the antenna 1 with the decorative bezel 2, which is very common for a user of the arm information device 20. It looks like a digital clock only. FIG. 2 shows the decorative bezel 2
Is cut away so that a part of the shape of the antenna 1 can be seen, so that the presence of the antenna 1 cannot be recognized on the product.

FIGS. 3 to 5 are views showing the shape and structure of the antenna 1 of the present invention shown in FIG. 2. FIG. 3 is a side view of FIG. 2 showing the shape of the antenna, and FIG. 5 is a side view of FIG. 4 showing the shape of the antenna. Also,
FIG. 1 is a cross-sectional view showing the structure of the arm information device 20 of FIG. 2, and shows a detailed cross-sectional view of FIG.

Reference numeral 3 denotes a case body of the arm information device 20, and a plastic windshield 6 having a cut-off printed on its lower surface is hermetically welded to the case body 3. Reference numeral 4 denotes a back cover, which is fixed to the case body 3 while compressing the packing 21 with the back cover set screws 4a and 4b. The case 10 is constituted by the case body 3 and the back cover 4, and has a waterproof structure. Is formed. Reference numeral 24 denotes a battery. When the battery cover 5 is fitted into the back cover 4, the packing 22 is compressed to form a waterproof structure between the battery cover 5 and the back cover 4 and to supply power to the battery 24. It has become.

The antenna 1 is a case 1 exposed to the outside air.
1st antenna member 1a arranged outside 10a
And a second antenna member 1b electrically connected to the first antenna member 1a and connected to one antenna feed port 9a, and further electrically connected to the first antenna member 1a. A third antenna member 1c connected to the other power supply port, and a first antenna member 1a.
And the second antenna member 1b and the first antenna member 1a
And the third antenna member 1c. In this embodiment,
As shown in the drawing, a case where two of the first antenna member 1a and the third antenna member 1c have a ring shape is shown, and the third antenna member 1c is further provided at two places as shown in FIG. It has a structure in which it is connected to the first antenna member 1a via a split bent portion.

Outside 10a of case 10 exposed to outside air
Connection member 11a between the first antenna member 1a and the second and third antenna members 1b and 1c on the inner side 10b of the case 10.
Is provided with a packing member 11c on its outer periphery, and a screw 11b is fixed to the connection member 11a, so that a first antenna member 1a on the outside 10a of the case 10 is provided.
And the second antenna member 1b and the third antenna member 1c on the inner side 10b of the case 10 are electrically connected. At the same time, the packing member 11c provides a waterproof structure between the case 10 and the connection member 11a. Make up. In addition,
Since the surfaces of the first antenna member 1a and the connecting member 11a of the present embodiment are exposed to the outside air, they pass the corrosion resistance test.
A special gold plating of 0 μ or more is applied to ensure the reliability of corrosion resistance.

The decorative bezel member 2 is formed by using a screw 11b to secure the first antenna member 1a on the outside 10a of the case 10 and the second and third antenna members 1b and 1 on the inside 10b of the case.
c after the electrical connection of c is made,
The first antenna member 1a disposed on the case body 3 is fixed to the case body 3 by screws 2a so as to cover the first antenna member 1a. Thus, the decorative bezel member 2 plays a role of hiding the antenna member 1a and improving the design of the arm information device. However, the decorative bezel member 2 only conceals the antenna member 1a, and has a structure in which water can enter the surface of the first antenna member 1a. The reliability of corrosion resistance is secured.

The opening area of the antenna 1 configured as described above is the product of the width W and the height H shown in FIG.
A larger opening area can be obtained than when the height H 'is obtained in the conventional structure in which the antenna 1 is housed at 0.

Reference numeral 8 denotes a display substrate for driving the liquid crystal cell 7, and reference numeral 18 denotes a liquid crystal cell support frame. Liquid crystal cell support frame 18
Then, the liquid crystal cell 8 and the rubber connector 19 are dropped, the display substrate 8 is overlapped, and the display substrate 8 is fixed to the liquid crystal cell support frame 18 using screws (not shown), so that the liquid crystal cell 7 and the display substrate 8 are separated. Electrically connected.

Reference numeral 9 denotes an RF board on which a decoder IC 13 is mounted and which performs signal processing for transmission and reception. A vibration motor 12, a PLL-IC 15,
A trimmer capacitor 16, a shield plate 17, and the like are mounted. A second antenna member 1b and a third antenna member 1c on the inner side 10b of the case 10 are electrically connected to the power supply port 9a of the RF board 9 and the other power supply port (not shown) by using solder 24. It is connected.

Numeral 14 denotes a rubber connector containing a gold-plated metal thin wire. The module 30 of the arm information device 20 is completed by fixing the circuit support base 23 and the liquid crystal cell support frame 18 using screws (not shown). Display substrate 8 and RF
The board 9 is electrically connected by a rubber connector 14.

The soldering between the second antenna member 1b and the third antenna member 1c on the inner side 10b of the case and the power supply port 9a of the RF board 9 and the other power supply port (not shown) are performed by soldering the module 30. In this state, after being stored in the case body 3, the back cover 4 is fixed, and the first 10a of the outer side 10a of the case 10 is fixed using the screws 11b.
Is electrically connected to the second and third antenna members 1b and 1c on the inside 10b of the case. Further, the decorative bezel member 2 is fixed to the case body 3 by the screw 2a.
And the arm information device 20 is thus configured.

In this embodiment, an example is shown in which the antenna is arranged outside the case body. However, depending on the design, the antenna may be arranged outside the back cover.

[0031]

As described above, according to the present invention,
Since the antenna can be arranged outside the case, the opening area of the antenna can be increased without increasing the thickness and size of the arm information device, and the sensitivity of the antenna can be increased.

In addition, since the packing member is attached to the connection member and the portion exposed to the outside air is plated with extra thick gold of 10 μ or more, even though the antenna is arranged outside the case, it is corroded. It is possible to construct a highly reliable, waterproof, arm-type information device.

Further, by covering the antenna member with the decorative bezel member, it is possible to provide an arm information device having a design which is not much different from that of the conventional arm information device despite the increased sensitivity of the antenna. .

Further, by dividing the antenna into three antenna members and connecting members, it is easy to assemble and disassemble. Even if the case is defective, the antenna can be reassembled and used. It is also possible to replace only one part, and even if a defect occurs, the replacement cost can be kept very low.

Further, since two ring-shaped antenna members are used, the liquid crystal cell can be arranged at the center of the module, and the display surface can be enlarged.
Further, since the battery lid is also brought to the center of the arm information device, it is possible to provide a well-balanced arm information device having excellent design.

[Brief description of the drawings]

1 is a detailed sectional view of FIG. 3;

FIG. 2 is a plan view of the arm information device showing one embodiment of the present invention.

FIG. 3 is a side view of FIG. 1 showing a shape of an antenna.

FIG. 4 is a rear view of FIG. 2;

FIG. 5 is a side view of FIG. 4 showing the shape of the antenna.

FIG. 6 is a plan view of a wrist information device in which a conventional loop antenna is disposed in a case.

7 is a cross-sectional view in the direction of arrow A in FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Antenna 1a 1st antenna member 1b 2nd antenna member 1c 3rd antenna member 2 Decorative bezel member 3 Case trunk 4 Back cover 10 Case 11a Connection member 11c Packing member 20 Arm information device

Claims (5)

[Claims] 1. An arm information device for receiving or transmitting information using an antenna, wherein a part of an antenna member constituting the antenna is arranged outside a case exposed to outside air of the arm information device. Antenna structure of information equipment. 2. The antenna for an arm information device according to claim 1, wherein a packing member is attached to a connection member between the antenna member outside the case and the antenna member inside the case to form a waterproof structure for the case. Construction. 3. The antenna structure for an arm information device according to claim 1, wherein the antenna member outside the case is covered with a decorative bezel member. 4. The antenna according to claim 1, further comprising: a first antenna member disposed outside the case, a second antenna electrically connected to the first antenna member, and a second antenna connected to one antenna feed port.
2. The antenna structure for an arm information device according to claim 1, further comprising an antenna member, and a third antenna member electrically connected to the first antenna member and connected to the other power supply port. . 5. The wrist information device according to claim 1, wherein the antenna is an antenna having two ring shapes, and one of the ring-shaped antenna members is arranged outside the case. Antenna structure.