JP2003060415A - Antenna and electronic apparatus using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an antenna and an electronic apparatus using the same which enables the space to be saved, has no need of designing the installing position and the structure of the antenna for each model of electronic apparatus, and can be installed at an optimum position for radio wave propagation characteristics having good designability. SOLUTION: The antenna has a control knot 21, supported by a case 27 an antenna element 17 mounted on the knob 21 with its feeder 15 led out to the case 27.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an antenna device and electronic equipment using the antenna device.

[0002]

2. Description of the Related Art FIG. 4 and FIG. 5 are perspective views of a conventional antenna device incorporated in an electronic device such as an audio device mounted on a vehicle. In FIG. 4, 101 is an electronic device (main body), and the electronic device 101 is a housing 10
3, the communication device 105, the electronic device substrate 107,
An antenna device 111 connected to the communication device 105 is provided and configured. On the operation panel 109 of the housing 103,
An operation component 113 (volume) for adjusting the volume is attached. The housing 103 is made of metal. The antenna element 117 of the antenna device 111 is, for example, a chip antenna. The antenna element 117 is installed inside the housing 103.

Further, in FIG. 5, reference numeral 121 denotes an electronic device (main body), which is the antenna element 1 of the antenna device 141.
43 is, for example, a rod-shaped antenna, and is made of a metal casing 10
3 is provided on the operation panel 109.

[0004]

However, as shown in FIG. 4, the antenna element 1 which is the antenna device 111 is used.
When 17 is built into the electronic device (main body) 121, a metal or the like that affects the radio wave propagation characteristics is often used as the housing 103, so it is necessary to select a location that does not affect the radio wave propagation characteristics. There is a problem. Further, in the case of FIG. 4, as shown in FIG. 5, there is a problem that the radio wave propagation characteristics are inferior to the case where the antenna element 143 which is the antenna device 141 is provided so as to project from the housing 103.

Further, as shown in FIG. 5, the antenna device 1
41 is an antenna element 143 of the rod-shaped antenna
In the case where the antenna element 143 is provided so as to project, the radio wave propagation characteristics are better than those in the case where the main body is built in, but the antenna element 143 is used in the electronic device 10.
(1) Since it projects from the main body, the design is poor, and there is a problem that a space for the antenna element 143 must be secured in a part of the operation panel 109.

Therefore, there is a problem that the installation position and structure of the antenna device must be designed for each model of electronic equipment.

Therefore, an object of the present invention is to solve the above-mentioned problems of the prior art and to save space, and to design the installation position and structure of the antenna device for each model of electronic equipment. An object of the present invention is to provide an antenna device which is well designed and can be installed at an optimum position for radio wave propagation characteristics, and an electronic device using the antenna device.

[0008]

The invention according to claim 1 is
It is characterized in that it is provided with an antenna element arranged inside the operation knob, and means for drawing out a feeder line of the antenna element to the outside of the operation knob.

According to a second aspect of the present invention, an operating knob supported by the case is provided, an antenna element is provided on the operating knob, and a feeder line of the antenna element is led out to the case side. is there.

According to a third aspect of the present invention, an operating knob rotatably or movably supported by the case is provided, an antenna element is provided on the operating knob, and a feeder line of the antenna element is led out to the case side. It is characterized by that.

According to a fourth aspect of the present invention, there is provided an operation knob rotatably supported by the case and having a hollow inside, and a chip antenna is fixedly provided separately from the operation knob in the hollow of the operation knob. The feed line of this chip antenna is led out to the case side and fixed to the case.

According to a fifth aspect of the present invention, one end of the rod-shaped antenna is press-fitted into the hole of the operation knob, the rod-shaped antenna is rotatably supported by the case, and the first end of the other end of the rod-shaped antenna is rotatably supported.
And the second electrode of the power feed line are capacitively coupled while holding a predetermined gap, and the power feed line is led out from the case side.

According to a sixth aspect of the present invention, in an electronic device including a communication device, the antenna device according to any one of the first to fifth aspects is provided in a housing of the electronic device, and the power supply line is provided in the communication device. It is characterized by being connected.

According to a seventh aspect of the present invention, there is provided an antenna device having an antenna element arranged in the operation knob.

The invention according to claim 8 is characterized in that, in the invention according to claim 6 or 7, the electronic equipment main body is mounted on a vehicle.

According to the first aspect of the present invention, the antenna element is arranged in the operation knob, and the power feeding line of the antenna element is drawn out from the outside of the operation knob. It is possible to combine both, and space saving can be achieved.

In the invention according to claim 2 or 3, the antenna element is provided in the switch or the volume provided with the case and the operation knob, and the feeder line of this antenna element is led out to the case side. The function of the antenna and the function of the volume and the like can be provided at the same time, and the space can be saved.

According to the fourth aspect of the invention, since the chip antenna and the power feed line are fixed without rotating with the rotation of the operation knob, twisting of the power feed line can be prevented.

In a fifth aspect of the present invention, the first electrode of the rod-shaped antenna that rotates with the rotation of the operation knob and the second electrode of the power supply line are capacitively coupled with each other while holding a predetermined gap. Therefore, it is possible to prevent the power supply line from being twisted.

In the invention according to any one of claims 6 to 8, since the antenna device also has a function such as a switch and a volume, the antenna device can be provided at a position where the switch and the volume are provided in the housing. Since there is no need to separately provide a space for installing the antenna device in the housing, it is possible to save space, and it is not necessary to design the installation position and structure of the antenna device for each model of the electronic device. Since the antenna element can be projected from the housing without the antenna element being visible, the antenna element can be installed at a position having a good design and an optimum radio wave propagation characteristic.

[0021]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings.

[A] First Embodiment FIG. 1 is a perspective view showing an electronic apparatus according to a first embodiment.

In FIG. 1, reference numeral 1 denotes an electronic device (main body), and the electronic device 1 is, for example, an audio device mounted on a vehicle. The electronic device 1 is configured to include a communication device 5 and a board 7 of the electronic device 1 in a housing 3 of the electronic device 1. The operation panel 1 of the housing 3 includes an operation part 1
An antenna device 11 integrated with 3 is attached.
The operation component 13 may be, for example, a volume (rotary variable resistor) that adjusts the volume, or a rotary switch that switches on and off.
The communication device 5 is, for example, a spread spectrum communication device in a frequency band (for example, 2 GHz band) for wireless data communication. The housing 3 is made of, for example, a metal, and when the antenna device 11 is installed inside the housing 3, the radio wave propagation characteristics may be affected. Therefore, the antenna device 11 is exposed to the outside of the housing 3. So as to protrude from the operation panel 9. Then, the power supply line 15 of the antenna device 11 is connected to the communication device 5.

FIG. 2 shows a side sectional view of the antenna device 11. The antenna device 11 includes an antenna element 17, a feeder line 15, and an operation component 13. The antenna element 17 is, for example, a chip antenna used in a frequency band for wireless data communication (for example, 2 GHz to 4 GHz). The feed line 15 is a coaxial cable 19 connected to the antenna element 17, and the coaxial cable 19 is
For example, a semi-rigid cable.

The operation part 13 is, for example, a rotary switch, a volume, etc., and is provided with an operation knob 21, a rotary shaft 23, a rotary plate 25, and a case 27. The operation knob 21 is made of an insulator such as resin or rubber having a substantially cylindrical shape. A rotary shaft 23 is fixed to the operation knob 21, and a rotary plate 25 is fixed to the rotary shaft 23.
3, and the rotating plate 25 are integrally supported by the case 27 so as to be rotatable. Rotating shaft 23 and rotating plate 25
Is composed of an insulator. This rotating plate 25 has an electric wire 2
9 and 31 are joined to the joining points 29a and 31a of the rotary plate 25, respectively. Here, for example, this operation component 13
Is a rotary switch, the on / off of the joining points 29a and 31a is switched by the rotation of the rotating plate 25. When the operation component 13 is a volume, the joining point 29a is rotated by rotating the rotating plate 25. , 31
The resistance value between a is changed.

A through hole 33 for inserting the coaxial cable 19 is formed in the rotary shaft 23 and the rotary plate 25 at the axial center thereof, and a cavity for inserting a chip antenna, which is the antenna element 17, inside the operation knob 21. 35 is formed.

A chip antenna which is the antenna element 17 is arranged in the cavity 35 of the operation knob 21, and one end of the coaxial cable 19 which is the feed line 15 is inserted into the through hole 33 of the rotary shaft 23 and the rotary plate 25 so that the antenna element is provided. Connected to 17. As a result, the power supply line 15 of the antenna element 17 is pulled out to the outside of the operation knob 21.
The other side of the coaxial cable 19 that is the power supply line 15 is a case 27.
Derived from. The copper outer coating 19a of the semi-rigid cable which is the coaxial cable 19 is fixed to the case 27 of the operation component 13 and grounded.

As a result, the chip antenna which is the antenna element 17 and the coaxial cable 19 which is the feeder 15 are
Since the operation knob 21, the rotary shaft 23, and the rotary plate 25 are fixed separately, they do not rotate with the rotation of the operation knob 21, the rotary shaft 23, and the rotary plate 25. Is the cavity 35 of the operation knob 21.
The coaxial cable 19 is prevented from twisting without coming into contact with the wall surface of the coaxial cable 19.

Further, the chip antenna which is the antenna element 17 can be inserted into the cavity 35 of the operation knob 21 without making the operation knob 21 large enough to deteriorate the design, and is not visible in appearance.

The above antenna device 11 is provided with the operation knob 21.
The antenna chip, which is the antenna element 17, is protruded from the housing 3 by being attached to the operation panel 9 so as to be exposed to the outside of the housing 3.

According to the first embodiment, the operating component 13
The operation knob 21 is provided with a chip antenna which is the antenna element 17, and the antenna device 11 can be integrated with the operation component 13, and can have both the function of the switch and the volume and the function of the antenna, thus saving space. Can be planned.

Since the antenna device 11 also has a function as an operation part 13 such as a switch and a volume, when the antenna device 11 is provided in the electronic device 1, the position where the operation part 13 of the display panel 9 of the housing 3 is provided. Since the antenna device 11 can be provided in the housing 3, it is not necessary to separately provide a space for providing the antenna device 11 in the operation panel 9 of the housing 3, and the space can be saved.
It is not necessary to design the installation position and structure of the antenna device 11 for each model of electronic equipment. In addition, since the antenna element 17 is provided so as to project from the operation panel 9, the metal housing 3
Antenna element 1 in appearance without being shielded by
Since the antenna element 17 can be projectingly provided on the operation panel 9 of the housing 3 without seeing the antenna 7, the design can be improved and the antenna element 17 can be installed at the optimum position of the radio wave propagation characteristic.

The chip antenna which is the antenna element 17 and the coaxial cable 19 which is the feeder line 15 are provided with the operation knob 21.
Since it is fixed without rotating in accordance with the rotation, the twisting of the coaxial cable 19 which is the power supply line 15 due to the rotation of the operation knob 21 can be prevented.

It goes without saying that the same effect can be obtained in the electronic device 1 mounted on the vehicle.

[B] Second Embodiment FIG. 3 is a side sectional view showing a second embodiment of the antenna device according to the present invention. In the second embodiment, the same parts as those in the first embodiment are designated by the same reference numerals and the description thereof will be omitted.

The antenna device 41 of the second embodiment
Is an antenna element 43 and an insulator 4 as shown in FIG.
5, the metal body 47, the power supply line 15, and the operation component 49. Here, the antenna device 41 integrated with the operation component 49 is attached to the electronic device 1 (FIG. 1) as in the first embodiment.

The antenna element 43 is a rod type antenna which also serves as a rotating shaft. One end of the rod-shaped antenna that is the antenna element 43 has an operation knob 51 of the operation component 49.
Is press-fitted into the hole 53, and the other end is connected to the first electrode 55 and fixed to the rotary plate 25. Operation knob 51
Is made of a substantially cylindrical insulator such as resin or rubber. A metal body 47 grounded via an insulator 45 is wound around the other end of the antenna element 43, and the metal body 47 is fixed to the case 27. As a result, the antenna element 43 is rotatably supported by the case 27.

If the portion of the antenna element 43 having the length L on the side where the metal body 47 is not wound is a quarter wavelength, a sleeve antenna is formed, but the invention is not limited to this. If the length L of the antenna element 43 on the side where the metal body 47 is not wound is ¼ wavelength, for example, in the case of a frequency band for wireless data communication (for example, 2 GHz to 4 GHz), ¼
The wavelength, that is, the length L is about 2 to 3 cm. Therefore, the antenna element 43 is not visible in appearance even if the operation knob 51 is not made large enough to deteriorate the design.

A second electrode 57 is connected to the power supply line 15. The power supply line 15 is fixed to the case 27. The first electrode 55 and the second electrode 57 are disc-shaped and have substantially the same shape, and the first electrode 55 and the second electrode 57 are the same.
Planes facing each other are formed substantially parallel to each other, and the first electrode 55 and the second electrode 57 are capacitively coupled while holding a predetermined gap.

The first electrode 55 rotates with the rotation of the operation knob 51, but the second electrode 57 is fixed to the power supply line 15, and the first electrode 55 and the second electrode 57 are
A predetermined gap is held and capacitively coupled so that power can be supplied to the rotation of the first electrode 55. Therefore, the operation knob 5
The rotation of 1 does not twist the power supply line 15.

Therefore, also in the second embodiment, the same effect as that of the first embodiment can be obtained, and in particular,
The first electrode 55 of the rod-shaped antenna, which is the rotating antenna element 43, and the second electrode 5 of the fixed power supply line 15.
Since 7 and 7 are capacitively coupled while holding a predetermined gap,
Twisting of the power supply line 15 can be prevented. Further, the first electrode 55 and the second electrode 57 are disk-shaped and have substantially the same shape, and the opposing planes of the first electrode 55 and the second electrode 57 are formed substantially parallel to each other. One electrode 55
Since the second electrode 57 and the second electrode 57 are capacitively coupled while holding a predetermined gap, the rotation of the first electrode 55 does not affect the radio wave propagation characteristics.

In the above-described first and second embodiments, the operation parts 13 and 49 are switches and volume controls, and the operation knobs 21 and 51 are rotatable, but a push button switch (not shown) is used. The operation knob such as) may be pushable, slidable, or the like, and may be in any other operation form.

Although the present invention has been described based on the above embodiment, the present invention is not limited to this.

[0044]

According to the present invention, it is possible to save space, and it is not necessary to design the installation position and structure of the antenna device for each model of electronic equipment, and the design is good and the radio wave propagation characteristics are optimized. It can be installed in any position.

[Brief description of drawings]

FIG. 1 is a perspective view showing a first embodiment of an electronic device according to the present invention.

FIG. 2 is a side sectional view showing the first embodiment of the antenna device according to the present invention.

FIG. 3 is a side sectional view showing a second embodiment of an antenna device according to the present invention.

FIG. 4 is a perspective view showing an example of a conventional electronic device.

FIG. 5 is a perspective view showing an example of a conventional electronic device.

[Explanation of symbols]

1 Electronic device (main unit) 3 housing 5 Communication device 11,41 Antenna device 15 power lines 17,43 Antenna element 19 coaxial cable 21, 51 control knob 27 cases 35 cavities 53 holes 55 First electrode 57 Second electrode

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁷ Identification code FI theme code (reference) H04B 1/08 H04B 1/08 N H04N 5/64 551 H04N 5/64 551G F term (reference) 3D020 BA13 BB01 BC10 BD07 5J046 AA07 AA12 AB06 AB13 MA03 MA11 SA01 SA03 5J047 AA07 AA12 AB06 AB13 EF05 5K016 AA08 BA01 CA03 CA07

Claims (8)

[Claims] 1. An antenna device, comprising: an antenna element arranged in an operation knob; and a means for drawing a power feed line of the antenna element to the outside of the operation knob. 2. An antenna device comprising an operation knob supported by a case, an antenna element provided on the operation knob, and a feeder line of the antenna element being led out to the case side. 3. An antenna characterized in that a case is provided with an operation knob rotatably or pushably supported, an antenna element is provided on the operation knob, and a feeder line of the antenna element is led out to the case side. apparatus. 4. An operation knob, which is rotatably supported by a case and has a cavity inside, is provided with a chip antenna fixedly provided separately from the operation knob in the cavity of the operation knob. An antenna device in which an electric wire is led out to the case side and fixed to the case. 5. One end of a rod-shaped antenna is press-fitted into a hole of an operation knob, the rod-shaped antenna is rotatably supported by a case, and the first electrode at the other end of the rod-shaped antenna and a first feed line are provided. An antenna device, wherein the second electrode and the second electrode are capacitively coupled while holding a predetermined gap, and the feeder line is led out from the case side. 6. An electronic device equipped with a communication device, wherein the antenna device according to claim 1 is provided in a housing of the electronic device, and the power supply line is connected to the communication device. Electronic equipment to do. 7. An electronic device comprising an antenna device having an antenna element arranged in an operation knob. 8. The electronic device according to claim 6, wherein the electronic device main body is mounted on a vehicle.