JP2003324302A - In-cabin radio communication apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an in-cabin radio communication apparatus which can improve the quality of radio communication with a radio communication terminal by widening the bandwidth of an antenna element built in the in-cabin radio communication apparatus, and improving the radiation efficiency and setting the directivity to the inner side of a cabin. <P>SOLUTION: The in-cabin radio communication apparatus includes a metal housing 31 provided to a dashboard, a resin-made front panel 32 which is fitted to the metal housing 31 to be positioned in the cabin, a switch substrate 35 which is provided to the resin-made front panel 32 and where a plurality of operation buttons 22a and a conductor pattern having switch elements detecting the operation buttons 22a being depressed are formed, and an antenna substrate 38 which has the antenna element 37 stored in the metal housing 31; and an opening part 47 is formed on the metal housing 31 positioned in the front of the antenna element 37 and a copper foil pattern at the part of the switch substrate 35 facing the opening part 47 is removed or an opening part 44 is formed. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle interior wireless communication device, and more particularly, to wireless communication with a wireless communication terminal such as a mobile phone which is mounted on a dashboard or the like in the vehicle interior and brought into the vehicle interior. The present invention relates to a vehicle interior wireless communication device that can be performed.

[0002]

2. Description of the Related Art As a conventional vehicle interior wireless communication device, by performing wireless communication with a wireless communication terminal such as a mobile phone brought into the vehicle interior, it is possible to operate without holding the mobile phone in hand. A so-called hands-free call system has been proposed (for example, JP 2001-103547 A).
(See Japanese Patent Publication).

In this type of vehicle interior wireless communication device,
It is necessary to install an antenna in order to communicate with a mobile phone, and an example of this type of antenna is disclosed in Japanese Patent Laid-Open No. 9-
As disclosed in Japanese Patent No. 64627, by laminating dielectric sheets having a conductive pattern and wiring via holes, a spiral conductor portion is formed, and a power supply terminal is provided on the spiral conductor portion to be surface-mounted on a dielectric substrate. An antenna that can be used has been proposed.

Further, as a vehicle interior wireless communication device provided with this type of antenna, for example, as shown in Japanese Utility Model Laid-Open No. 5-3043, 1 DIN size (50 mm × 178 mm) formed on a dashboard in the vehicle interior Or 2D
In addition to a display device and audio device that are housed and fixed in a recess of IN size (100 mm x 178 mm),
There are navigation devices and the like.

This vehicle interior wireless communication device is housed in a recess formed in a dashboard in the vehicle interior, and is fixed to the chassis of the vehicle to form a rectangular parallelepiped metal made of iron or aluminum for equalizing the GND. The housing and a front panel attached to the front surface of the metal housing are provided. The front panel includes a display device such as a liquid crystal display, operation buttons made of resin such as ABS for operation, and the display device and buttons. A switch board or the like on which a switch element or the like for detecting the pressing of is pressed is mounted.

The front panel has a CD, MD,
In some cases, the insertion opening appears when the movable front panel is opened without providing an insertion opening for inserting a DVD, a cassette tape, or the like into a deck in a metal housing. Further, the front panel may be made of a resin such as ABS or the like, and may be made of a metal such as an aluminum die-cast for strength and static electricity countermeasures.

[0007]

However, in such a conventional vehicle interior wireless communication device, the metal housing housed in the recess formed in the dashboard in the vehicle interior and the front surface of the metal housing. Since the front panel is attached to, and the display and switch board are built in this metal housing and front panel, the antenna can be mounted when the antenna is built in this metal housing and front panel. Space is limited, and the antenna is surrounded by metal, so the bandwidth of the antenna element is narrowed, and the radiation efficiency is low, so it is difficult for the directivity to face the interior of the vehicle. There is a problem that the quality of wireless communication with a wireless communication terminal such as a telephone is deteriorated.

The present invention solves the above-mentioned conventional problems by widening the bandwidth of the antenna element incorporated in the vehicle interior wireless communication device and improving the radiation efficiency to direct the directivity toward the vehicle interior. Provided is an in-vehicle wireless communication device capable of improving wireless communication quality with a wireless communication terminal.

[0009]

A vehicle interior wireless communication device according to the present invention is a metal housing mounted at an arbitrary position inside a vehicle interior, and is mounted on the metal housing so as to be located inside the vehicle interior. A resin panel, and provided on the resin panel,
The antenna includes: a switch substrate on which a conductor pattern having a plurality of operation buttons and a switch element that detects that the operation button is pressed is formed; and an antenna substrate that is housed in the metal housing and has an antenna element. A first opening is formed in the metal housing located on the front surface of the element, and a region where the conductor pattern does not exist is provided in a portion of the switch substrate facing the first opening. It is composed of those forming the opening.

With such a structure, the distance between the antenna element and the front surface of the metal housing and the switch substrate can be secured, so that the bandwidth of the antenna element can be widened.

Further, since the antenna element can be made to face the passenger compartment side through the first opening of the metal casing, the portion of the switch board where the conductor pattern is removed, or the second opening of the switch board. The radiation efficiency of the antenna element can be improved and the directivity of the antenna element can be directed toward the interior of the vehicle. As a result, the quality of wireless communication with the wireless communication terminal can be improved.

Further, the vehicle interior wireless communication device of the present invention includes a metal housing mounted at an arbitrary position inside a vehicle, and a resin panel attached to the metal housing so as to be located inside the vehicle. A switch board provided on the resin panel, wherein a conductive pattern having a plurality of operation buttons and a switch element for detecting that the operation button is pressed is formed; and an antenna board having an antenna element, The antenna substrate is provided between the metal housing and the switch substrate, and a portion of the switch substrate facing the antenna element is provided with a region where the conductor pattern does not exist or forms an opening. Composed of.

With such a structure, the antenna element is provided between the metal housing and the switch board to be positioned outside the metal housing, and the distance between the antenna element and the front surface of the metal housing and the switch board is secured. Therefore, the bandwidth of the antenna element can be widened. Further, since the antenna element can be made to face the passenger compartment side through the portion of the switch substrate where the conductor pattern is removed or through the opening of the switch substrate, it is possible to improve the radiation efficiency of the antenna element. The directivity of can be directed toward the interior of the vehicle. As a result, the quality of wireless communication with the wireless communication terminal can be improved.

Further, the vehicle interior wireless communication device of the present invention is formed by forming a parasitic element conductor pattern different from the conductor pattern on a portion of the switch substrate where the conductor pattern is removed.

With such a structure, the radiation efficiency of the antenna element can be improved by the parasitic element, and the directivity of the antenna element can be further directed toward the interior of the vehicle. As a result, the quality of wireless communication with the wireless communication terminal can be improved.

Further, the vehicle interior wireless communication device of the present invention includes a metal housing mounted at an arbitrary position inside the vehicle interior, and a resin panel attached to the metal housing so as to be located inside the vehicle interior. And a switch substrate provided on the resin panel, on which a conductor pattern having a plurality of operation buttons and a switch element for detecting depression of the operation buttons is formed, and an antenna element is provided on the switch board. It is composed of

With such a configuration, since the antenna element is provided on the switch substrate provided on the resin panel, the radiation efficiency can be improved and the directivity of the antenna element can be directed toward the interior of the vehicle. As a result, the quality of wireless communication with the wireless communication terminal can be improved.

Further, in the vehicle interior wireless communication device of the present invention, the parasitic element is formed by applying a coating material having a high metal content on the surface of the resin panel located in front of the antenna element. Composed.

With such a structure, the radiation efficiency of the antenna element can be improved by the parasitic element made of the paint having a high metal content, and the directivity of the antenna element can be further directed toward the interior of the vehicle. As a result, the quality of wireless communication with the wireless communication terminal can be improved. Further, by devising the design of the parasitic element, the parasitic element and the logo can be combined.

Also, in the vehicle interior wireless communication device of the present invention, the antenna substrate is provided with a one-wavelength loop antenna as an antenna element and a transmission / reception module connected to the antenna element, and the one-wavelength loop antenna is
The transmission / reception module is connected to the antenna substrate so as to cover the transmission / reception module at a predetermined distance from the antenna substrate in parallel with the antenna substrate, and points of quarter wavelength from the feeding point of the one-wavelength loop antenna It consists of the one placed in front of.

With this structure, the space required for mounting the antenna element can be reduced.

Further, the vehicle interior wireless communication device of the present invention comprises a metal housing mounted at an arbitrary position inside the vehicle interior, and a metal panel mounted on the metal housing so as to be located inside the vehicle. A switch board provided on the metal panel and having a conductive pattern having a plurality of operation buttons and a switch element for detecting depression of the operation button; and an antenna element provided on the switch board. , An opening is formed in the portion of the metal panel located in front of the antenna element.

With such a structure, the distance between the antenna element and the front surface of the metal housing and the switch substrate can be secured, so that the bandwidth of the antenna element can be widened. Further, since the antenna element can be directed into the vehicle interior through the opening formed in the metal panel, the radiation efficiency of the antenna element can be improved and the directivity of the antenna element can be directed toward the vehicle interior. As a result, the quality of wireless communication with the wireless communication terminal can be improved.

Further, the vehicle interior wireless communication device of the present invention includes a metal housing mounted at an arbitrary position inside the vehicle interior, and a metal panel mounted to the metal housing so as to be located inside the vehicle. A switch board provided on the metal panel, the switch board having a plurality of operation buttons and a conductor pattern having a switch element for detecting depression of the operation button, and the antenna board having an antenna element. And an opening is formed in the portion of the metal panel located in front of the antenna element.

With such a configuration, the antenna element can be positioned outside the metal housing and the distance between the antenna element and the front surface of the metal housing and the switch substrate can be secured, so that the bandwidth of the antenna element can be widened. can do.
Further, since it can be directed into the vehicle interior through the opening of the metal panel, the radiation efficiency of the antenna element can be improved and the directivity of the antenna element can be directed toward the vehicle interior. As a result, the quality of wireless communication with the wireless communication terminal can be improved.

Further, the vehicle interior wireless communication device of the present invention includes a metal housing mounted at an arbitrary position inside the vehicle interior, and a metal panel mounted to the metal housing so as to be located inside the vehicle. A switch substrate provided on the metal panel and having a conductive pattern having a plurality of operation buttons and a switch element for detecting depression of the operation buttons, and an opening is formed in the metal panel In addition, a resin case is attached to the opening, an antenna element is formed by attaching a conductor to the back surface of the resin case, and the switch substrate is provided with a contact-type power supply device for exciting the antenna element. Composed of things.

With this structure, an opening is formed in the metal panel, a resin case is attached to the opening, and a conductor is attached to the back surface of the resin case to form an antenna element. Since the contact-type power supply device for exciting the antenna element is provided, the radiation efficiency of the antenna element can be further improved, and the directivity of the antenna element can be directed toward the vehicle interior.
As a result, the quality of wireless communication with the wireless communication terminal can be improved.

In the vehicle interior wireless communication device of the present invention, a resin case is attached to the opening of the metal panel so as to cover the antenna element, and the resin case also serves as one of the operation buttons. Composed of.

With such a configuration, it can be used also as a resin case operation button for achieving the directivity of the antenna, and the number of operation buttons can be increased without increasing the installation area of the operation buttons.

Further, in the vehicle interior wireless communication device of the present invention, a resin case is attached to the opening of the metal panel so as to cover the antenna element, and the surface of the resin case is coated with a paint having a high metal content. Thus, a parasitic element is formed.

With such a structure, the radiation efficiency of the antenna element can be further improved by the parasitic element, and the bandwidth of the antenna element can be widened to improve the radiation efficiency. As a result, the quality of wireless communication with the wireless communication terminal can be improved.

Further, the vehicle interior wireless communication device of the present invention includes a metal housing mounted at an arbitrary position inside the vehicle interior, and a metal panel mounted on the metal housing so as to be located inside the vehicle. A plurality of operation buttons made of resin and connected to each other by a connecting portion, and an opening formed on a metal panel so that the operation buttons can be mounted, and having an effective length of about a half wavelength and a width smaller than the execution length. And a feeding point provided in the width direction of the opening.

With this structure, the operation buttons connected by the connecting portion are mounted in the opening of the metal panel, and the opening has an effective length of about half a wavelength and a width smaller than the execution length. Since the feeding point is provided in the width direction of the opening, it is possible to further widen the bandwidth of the antenna element and further improve the radiation efficiency of the antenna element. Can be turned. As a result, the quality of wireless communication with the wireless communication terminal can be improved.

Further, the vehicle interior wireless communication device of the present invention comprises a moving means for moving the antenna substrate in at least two steps.

With this configuration, the antenna substrate can be moved in at least two steps toward the interior of the vehicle, so that the receiving position of the antenna element can be varied, the bandwidth of the antenna element can be widened, and the radiation efficiency can be improved. It can be further improved. As a result, the quality of wireless communication with the wireless communication terminal can be improved.

Further, the vehicle interior wireless communication device of the present invention comprises the received power detecting means for detecting the power received by the antenna element, and the moving means moves in accordance with the detection value detected by the received power detecting means. It consists of what you do.

With this structure, the antenna substrate can be moved toward the vehicle interior only when the wireless communication terminal is present in the vehicle interior. Therefore, when it is necessary to communicate with the wireless communication terminal, the antenna element is oriented. It is possible to improve the radiation efficiency toward the interior of the vehicle, widen the bandwidth of the antenna element, and improve the radiation efficiency.

Further, the vehicle interior wireless communication device of the present invention comprises a power-on detecting means for detecting power-on, and the moving means moves according to a detection value detected by the power-on detecting means. To be done.

With this configuration, the antenna substrate can be moved toward the vehicle interior only when power is supplied to the vehicle interior wireless communication device, so that the antenna element can be used when communication with the wireless communication terminal is required. Can be directed toward the interior of the vehicle, the bandwidth of the antenna element can be widened, and the radiation efficiency can be improved.

[0040]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. 1 to 5 are views showing a first embodiment of a vehicle interior wireless communication device according to the present invention.

First, the structure will be described. In FIG. 1 and FIG. 2, a 2DIN size recess (not shown) is formed in the dashboard 2 provided in the front of the vehicle 1
A vehicle interior wireless communication device 3 is provided in this recess, and this wireless communication terminal device 3 can communicate with a mobile phone 4 as a wireless communication terminal.

The mobile phone 4 comprises a communication network radio circuit 5, a control circuit 6, a local radio circuit 7, a voice input / output circuit 8, an operating section 9 and a liquid crystal display 10.

An antenna 11 is connected to the radio communication circuit 5 and executes radio communication processing with the base station 12 based on a command from a control circuit 6 having a CPU (Central Processing Unit). An antenna 13 is connected to the local wireless circuit 7, and executes wireless communication processing with the vehicle interior wireless communication device 3 based on a command signal from the control circuit 6.

The voice input / output circuit 8 is connected to a microphone 15 for inputting a voice to be transmitted and a speaker 16 for outputting a voice to be received so that voice processing is executed. The operation unit 9 outputs an operation signal indicating a button operation to the control circuit 6
When the operation signal is input from the operation unit 9, the control circuit 6 decodes the input operation signal. Then, the control circuit 5 outputs the display command to the liquid crystal display 10 to display the display information according to the display command on the liquid crystal display 10.

On the other hand, the vehicle interior wireless communication device 3 comprises a local wireless circuit 21, an operating section 22, a control circuit 23, a deck 24, and a liquid crystal display 25.

The local radio circuit 21 has a built-in antenna substrate on which an antenna element is mounted, and executes radio communication processing with the mobile phone 4 based on a command signal from the control circuit 23. The operation unit 22 includes a plurality of operation buttons, outputs an operation signal indicating button operation to the control circuit 23,
When an operation signal is input from the operation unit 22, the reference numeral 23 decodes the input operation signal, displays the operation content on the liquid crystal display 25, and executes a hands-free process.

The deck 24 reads CDs, DVDs, cassette tapes, MDs, etc., outputs them from the speaker 26 provided on the dashboard 2, and performs signal processing for navigation.

The control circuit 23 is adapted to execute processing for audio and navigation, outputs a command signal to the deck 25, reads the above-mentioned recording medium inserted in the deck, and presently displays it on an external liquid crystal display. The position is displayed and the speaker 26 outputs voice and music relating to various instructions.

The hands-free device 27 is equipped with a microphone installed on the ceiling panel and the above-mentioned speaker 26, and executes a hands-free incoming call based on a command signal from the control circuit 23. Hands-free communication is performed with the mobile phone 4.

Next, the vehicle interior wireless communication device 3 will be described in detail with reference to FIGS. Here, in the present embodiment, the operating frequency of the antenna is 2.4 GH as an example.
A z-band will be described.

FIG. 3 (a) is a front view of the vehicle interior wireless communication device 3 as seen from the passenger compartment, FIG. 3 (b) is a sectional view taken along line AA of FIG. 3 (a), and FIG. 4 (a) is FIG. FIG. 4B is a sectional view taken along line BB in FIG.
FIG. 3B is a front view of the metal housing when the resin front panel to which the switch substrate is attached is removed from the state of FIG.

In FIG. 3 and FIG. 4, the wireless communication terminal device 3 is housed in the recess of the dashboard 2 and is fixed to the chassis of the vehicle by a rectangular parallelepiped metal casing 31 made of iron or aluminum for grounding. The metal housing 31 has an ABS on the front surface (that is, inside the vehicle interior).
A resin front panel (resin panel) 32 made of resin such as is attached.

The resin front panel 32 has a CD or a DVD.
Inserting port 33 for cassette tape, MD, etc.,
The liquid crystal display 25 and the plurality of operation buttons 22a of the operation unit 22 described above are provided.

On the back surface of the resin front panel 32, there is provided a switch board 35 on which a switch element (not shown) for detecting the depression of the operation button 22a is mounted.

Further, in the metal housing 31, the deck 24 described above is used.
A main board 36 on which the control circuit 23 is mounted is housed. In addition, a surface mount type antenna element is provided in the metal housing 31.
37 is housed, and the antenna element 37 is mounted on the antenna substrate 38. Further, on the antenna substrate 38, a surface-mount type transmission / reception module 39 in which a radio part and a baseband part connected to a power supply terminal of the antenna element 37 are integrally covered with a shield case is mounted.

As shown in FIG. 5, the antenna board 38 is provided with a connector 40. The connector 40 is connected to the connector 41 of the main board 36. The antenna board 38 and the main board 36 are connected to the connector 40, Connected by 41. In order to attach the antenna board 38 to the main board 36, the antenna board 38 is moved upward (Y direction) to connect the connector 40 to the connector 41.

Further, the switch board 35 is formed with an insertion opening 42 communicating with the insertion opening 33 and an insertion opening 43 communicating with the insertion opening 34, and an opening (second opening) 44 is provided. The opening 44 faces the antenna substrate 38.

On the front surface of the metal casing 31, an insertion port 45 communicating with the insertion port 33 and the insertion port 42 and an insertion port 46 communicating with the insertion port 34 and the insertion port 43 are formed.
An opening (first opening) 47 communicating with the opening 44 is formed, and the antenna element 37 faces the resin front panel 32 through the opening 44 and the opening 47.

In this embodiment, since the distance between the antenna element 37 and the front surface of the metal housing 31 and the pattern on the switch substrate 35 and the metal such as the switch element can be secured, the bandwidth of the antenna element 37 should be widened. You can

Since the antenna element 37 is directed into the vehicle compartment through the opening 44 formed in the switch substrate 35 and the opening 47 formed in the front surface of the metal casing 31, the radiation efficiency of the antenna element 37 is improved. By improving the directivity of the antenna element 37, the directivity of the antenna element 37 can be directed toward the vehicle interior (Z direction). As a result, the quality of wireless communication with the mobile phone 4 can be improved.

The antenna element 37 incorporated in the vehicle interior wireless communication device 3 of this embodiment is not limited to that of this embodiment, and may be, for example, a patch antenna, a loop antenna, a dipole antenna, a monopole antenna, or the like. By providing openings 44 and 47 having appropriate areas on the front surfaces of the switch board 35 and the metal housing 31, respectively, substantially the same effect can be obtained.

Further, the case where the opening 44 is provided in the switch substrate 35 has been described. However, without providing the opening 44, a conductor pattern is formed so that components are not placed on both the surface layer and the inner layer and an electric circuit is not formed. It is also possible to provide a region in which is not present.

Here, in order to provide the area where the pattern does not exist, the conductor pattern provided in advance by the etching process or the cutting operation is removed at the position facing the antenna element 37 of the switch substrate 35, or the conductor is previously removed. After the deleted conductor sheet is attached to the substrate, an etching process or the like may be performed to form a circuit on the conductor sheet.

When the switch substrate 35 has a sufficient area for mounting the antenna element 37, the antenna element 35 is placed at a position corresponding to the antenna substrate 38 of the switch substrate 35 without using the antenna substrate 38. Antenna element 37 can be formed by forming or pasting a pattern.
May be implemented.

6 to 8 are diagrams showing a second embodiment of the vehicle interior wireless communication device according to the present invention. In the present embodiment, the same components as those in the first embodiment are designated by the same reference numerals and the description thereof will be omitted. Since the basic configurations of FIGS. 1 and 2 are not changed, the drawings of FIGS. 1 and 2 are incorporated.

In FIGS. 6 to 8, the wireless communication terminal device 3 is housed in the recess of the dashboard 2 and is fixed to the chassis of the vehicle by a rectangular parallelepiped metal housing 52 made of iron or aluminum for grounding. An opening 53 is formed on the front surface of the metal housing 52.

The connector 54 provided on the main board 36 is connected to the connector 55 provided on the antenna board 56, and the connector 55 is located on the front surface of the metal housing 52 through the opening 53. For this reason, the antenna board 56 is attached to the metal housing 52.
And the resin front panel 32. Further, in the present embodiment, since the antenna substrate 56 is located outside the metal casing 52, no opening is formed in the portion of the metal casing 51 facing the antenna element 37.

Further, in this embodiment, the antenna substrate 56
When the is mounted on the main board 36, the antenna board 56 is moved in the lateral direction (Z direction) to connect the connector 54 to the connector 55.

In this embodiment, since the distance between the antenna element 37 and the metal on the front surface of the metal housing 52 and the switch substrate 56 and the metal such as the switch element can be secured, the bandwidth of the antenna element 37 can be widened. You can

Further, since the antenna element 37 is directed into the vehicle compartment through the opening 44 formed in the switch substrate 35, the radiation efficiency of the antenna element 37 is improved and the directivity of the antenna element 37 is directed toward the vehicle compartment. It can be turned to (Z direction). As a result, the quality of wireless communication with the mobile phone 4 can be improved.

If the lengths of the front surface of the metal housing 52 in the X direction and the Y direction are set to be equal to or more than half wavelength (about 60 mm), the front surface of the metal housing 52 can be used for vertical polarization and horizontal polarization, respectively. As a reflection plate, the gain in the vehicle interior direction can be improved. Further, in the present embodiment, since the metal housing 52 is not provided with the opening facing the antenna element 37, the metal housing 52 is different from the metal housing in the first embodiment.
The opening area provided in 52 can be reduced, and the strength of the metal housing 52 can be improved.

As a result, even in the present embodiment, the bandwidth of the antenna element 37 can be widened and the radiation efficiency can be improved to direct the directivity toward the vehicle interior.
The wireless communication quality with the mobile phone 4 can be improved.

The antenna element 37 built in the vehicle interior wireless communication device 51 is not limited to the one in this embodiment, and for example,
A patch antenna, a loop antenna, a dipole antenna, a monopole antenna, or the like may be used, and by providing the switch substrate 35 with an opening having an appropriate area, substantially the same effect can be obtained.

In the one-wavelength loop antenna or the like, by electrically connecting the GND of the antenna substrate 56 and the metal conductor, the gain in the vehicle interior direction can be further improved. Further, although the case where the opening 44 is provided in the switch substrate 35 has been described in the present embodiment, it is also possible to provide the surface layer and the inner layer in a region where the pattern and the part do not exist without providing the opening 44. If the switch substrate 35 has a sufficient area for mounting the antenna element 37, the antenna element 37 may be mounted on the switch substrate 35 without using the antenna substrate 56.

FIG. 9 is a diagram showing a third embodiment of the vehicle interior wireless communication device according to the present invention. In the present embodiment, the same components as those in the first and second embodiments are designated by the same reference numerals and the description thereof will be omitted.

The present embodiment is characterized by the switch board, and the other structures are the same as those of the first and second embodiments, so only the switch board will be described. In FIG. 9, a region 63 where no patterns and parts are present in both the surface layer and the inner layer is provided in a portion of the switch substrate 62 of the vehicle interior wireless communication device 61 facing the antenna substrate 38, and this region 63 has a copper foil. A parasitic element 64 formed of a conductor pattern made of and having an effective length smaller than a half wavelength is provided.

In the present embodiment, since the parasitic element 64 operates as a waveguide element, the directivity of the antenna can be more strongly directed toward the passenger compartment (Z direction), which is the same as in the first and second embodiments. In addition, the bandwidth of the antenna element can be widened and the radiation efficiency can be improved to direct the directivity toward the interior of the vehicle. As a result, the wireless communication quality with the mobile phone 4 can be improved.

Although the parasitic element 64 of the present embodiment has a linear shape, it is not limited to this and may have a meandering shape, and the same effect can be obtained in this case.

FIG. 10 is a diagram showing a fourth embodiment of the vehicle interior wireless communication device according to the present invention. In the present embodiment, the same components as those in the first and second embodiments are designated by the same reference numerals and the description thereof will be omitted.

The present embodiment is characterized by the resinous front panel, and other configurations are similar to those of the first and second embodiments, and therefore only the resinous front panel will be described.

In FIG. 10, a resin front panel 72 of a vehicle interior wireless communication device 71 has a meandering parasitic element 73 on the surface facing the antenna element 37 in the vehicle interior direction (Z direction).
The parasitic element 73 is obtained by applying a paint having a high metal content to the resin front panel 72, and its effective length is less than half a wavelength.

In this embodiment, since the parasitic element 73 operates as a waveguide element, the directivity of the antenna element 37 can be made stronger toward the passenger compartment. In addition, by changing the color of the paint of the parasitic element 73 applied to the entire resin front panel 72 and the color of the parasitic element 73, the brand name and product name can be marked with a cursive script or a single stroke, and It can also double as a logo.

As a result, even in the present embodiment, the bandwidth of the antenna element can be widened and the radiation efficiency can be improved to direct the directivity toward the vehicle interior, as in the first and second embodiments. Therefore, the wireless communication quality with the mobile phone 4 can be improved.

The parasitic element 73 is not limited to the meandering one as in the present embodiment, and the same effect can be obtained by using a linear one or the like.

11 to 13 are views showing a fifth embodiment of the vehicle interior wireless communication device according to the present invention. In the present embodiment, the same components as those in the first and second embodiments are designated by the same reference numerals and the description thereof will be omitted.

In FIGS. 11 and 12, a vehicle interior wireless communication device
An antenna substrate 82 provided on the back surface of the resinous front panel 32 of 81 is provided with a loop antenna (antenna element) 83 having an effective length of one wavelength. The rectangular loop surface of the loop antenna 83 has a transmitting / receiving module. The antenna substrate 82 is arranged so as to cover 84 and is disposed closer to the passenger compartment by about 10 mm.

FIG. 13 is a diagram showing the current distribution and the current peak points of the loop antenna 83. The dotted line shows the current distribution and the black circles show the current peak points. Rectangular loop antenna 83
Is the midpoint e of the side ab, and the side c facing the point e
The midpoint f of d is the peak point of the common mode current.

Since the currents on the sides bc and da are canceled out and do not contribute to radiation, the sides ab and c contribute to radiation.
There is only the current of d. The height of the transceiver module 84 is 5m
If it is about m, the side bc and the side da that do not contribute to radiation
Is arranged so as to cover the transmission / reception module so that the distance to the transmission / reception module 84 is about 5 mm, and the side ab and the side cd are arranged so as not to cover the transmission / reception module 84 so as to secure a distance of about 10 mm from the antenna substrate 82. To do.

That is, the loop antenna 83 is connected to the antenna substrate 82 so as to cover the transmission / reception module 84 at a predetermined distance from the antenna substrate 82 in parallel with the antenna substrate 82, and 4 minutes from each feeding point e of the loop antenna 83. Of 1
Wavelength points are located on the front of the transceiver module 84.

Therefore, in this embodiment, the loop antenna 83 has a portion that contributes to radiation and the transmission / reception module 84.
Since it is possible to secure a distance to a metal such as, the bandwidth of the antenna element 83 can be widened, and the radiation efficiency can be improved. Further, since the loop antenna 83 is arranged on the same mounting surface as the transmission / reception module 84 so as to cover it, the space required for mounting the loop antenna 83 can be reduced.

Further, the front surface of the metal casing 52 and the switch substrate
The lengths of 35 in the X and Y directions are each half wavelength (about 6
Since it is set to 0 mm) or more, the front surface of the metal housing 52 and the switch substrate 35 can be operated as a reflector for each of the vertically polarized waves and the horizontally polarized waves, and the gain in the vehicle interior direction can be improved.

As a result, also in the present embodiment, the bandwidth of the antenna element 37 can be widened and the radiation efficiency can be improved so that the directivity is directed toward the passenger compartment as in the first and second embodiments. In addition to being able to aim and improve the quality of wireless communication with the mobile phone 4,
The space required for mounting the loop antenna 83 can be reduced.

The loop antenna 83 is not limited to the rectangular shape of the present embodiment, but may be, for example, a circular shape or an elliptical shape.
A meander shape or the like may be used, and substantially the same effect can be obtained by not disposing the transmission / reception module 84 between the feeding point e and a point of a half wavelength from the feeding point e and the antenna substrate 82. Further, by electrically connecting the GND of the antenna substrate 82 to the metal housing 52 and the switch substrate 35, the gain in the vehicle interior direction can be further improved.

14 to 16 are views showing a sixth embodiment of the vehicle interior wireless communication device according to the present invention. In the present embodiment, the same components as those in the first embodiment are designated by the same reference numerals and the description thereof will be omitted.

The present embodiment is an example in which a metal front panel is provided in place of the resin front panel.

In FIGS. 14 and 15, a vehicle interior wireless communication device
A metal front panel (metal panel) 92, which is a metal front panel made of aluminum die-casting or the like, is provided on the front surface of the metal housing 31 of 91. (See FIG. 14 (a)) and the position where it is pulled out forward and becomes horizontal (FIG. 14 (b)).
(See), and when it moves horizontally, the insertion slot 45,
46 is exposed.

Further, the metal front panel of the present embodiment
Since 92 does not have an insertion opening, a large-sized liquid crystal display 93 is provided correspondingly. Further, a plurality of operation buttons 94 are provided on the metal front panel 92, and a switch element 95 for detecting depression of the operation button 94 and a transmission / reception module 97 are provided on the back surface of the metal front panel 92.
A switch board 96 on which is mounted is provided.

The switch substrate 96 has an antenna element 98.
Is connected to the antenna substrate 99. The antenna substrate 99 is arranged in the vehicle interior direction (Z direction) at a predetermined distance from the switch substrate 96. Further, an opening 100 is formed on the front surface of the metal front panel 92,
The antenna element 98 extends from the opening 100 to the metal front panel 92.
It protrudes toward the passenger compartment.

Further, a resin case 101 is mounted on the front surface of the metal front panel 92 so as to cover the antenna element 98, and the resin case 101 may be made of the same material as that of the operation button 94 and the manufacturing process thereof. An opening 102 is formed on the front surface of the metal front panel 92 for mounting the operation button 94.

FIG. 16 is a perspective view of an antenna board 99 on which an antenna element 98 is mounted. The antenna board 99 is inserted into a switch board 96 and is electrically connected to a radio section of a transceiver module 97. 103, ground wire 104 and matching circuit
105 is provided.

In the present embodiment, since the antenna element 98 is projected in the vehicle interior direction through the metal front panel 92 through the opening 100, the bandwidth of the antenna element 98 can be widened and the radiation efficiency can be improved. The gain in the vehicle interior direction can be improved. Therefore, it is possible to improve the wireless communication quality with the mobile phone 4.

The antenna element 98 built in the vehicle interior wireless communication device 91 is not limited to that of this embodiment, and may be, for example, a patch antenna, a loop antenna, a dipole antenna,
A monopole antenna or the like may be used, and by arranging the antenna board 99 on which the antenna element 98 is mounted from the switch board 96 at a predetermined distance in the vehicle interior direction, substantially the same effect can be obtained.

[0103]

If the distance between the metal front panel 92 and the switch substrate 96 is small and the metal front panel 92 can be provided with a sufficient opening for an antenna element, the switch substrate 99 is not used. The antenna element 98 may be mounted on 96.

FIG. 17 is a diagram showing a seventh embodiment of the vehicle interior wireless communication device according to the present invention. In the present embodiment, the same components as those in the first embodiment are designated by the same reference numerals and the description thereof will be omitted. The present embodiment is an example in which a metal front panel is provided in place of the resin front panel.

In FIG. 17, a metal front panel (metal panel) is formed on the front surface of the metal casing 31 of the vehicle interior wireless communication device 110 by a metal front panel made of aluminum die casting or the like.
111 is provided, and this metal front panel 111 is
Similar to the sixth embodiment, it is movable between a position in contact with the front surface of the metal housing 31 and a position in which the metal housing 31 is pulled out to a horizontal state.

Further, the metal front panel of this embodiment
Since 111 does not have an insertion opening, a large-sized liquid crystal display 112 is provided correspondingly. Further, a plurality of operation buttons 113 are provided on the metal front panel 111, and the operation buttons 1 are provided on the back of the metal front panel 111.
A switch board 114 on which a switch element 114 for detecting the depression of the switch 13, a transceiver module 115, and an antenna element 116 are mounted.
7 are provided.

Further, an opening 118 is provided in the front surface of the metal front panel 111, and a resin case 119 is provided in the opening 118 so as to face the antenna element 116. In addition, the switch substrate 1 facing the resin case 119
A switch element 120 is provided in the portion 17 and the resin case 119 also serves as an operation button for operating the switch element 120.

A parasitic element 121 is coated on the surface of the resin case 119. The parasitic element 121 is made of a paint having a high metal content and is formed in a meandering shape having an effective length of less than half a wavelength. ing. The resin case 119 may be the same in material and manufacturing process as the operation button 113.

In the present embodiment, the metal front panel 11
Since the resin case 119 housed in the opening 118 of 1 also serves as a resin case for covering the antenna element 116 and an operation button, it is not necessary to provide an opening for exclusive use of the antenna in the metal front panel 111, and it is necessary for mounting the antenna element 116. The space can be reduced.

Further, since the parasitic element 121 operates as a waveguide element, the directivity of the antenna element 116 can be more strongly directed toward the passenger compartment (Z direction). In addition, the paint of the parasitic element 121, in addition to the name of the paint applied to the entire resin case 119 and the color indicating the function of the operation button by changing the color, the brand name, product name, etc. should be marked with a cursive script or a single stroke The waveguide element can double as a logo.

Also in this embodiment, the antenna element 11
In addition to being able to widen the bandwidth of 6, the radiation efficiency can be improved and the directivity can be directed to the interior of the vehicle, the wireless communication quality with the mobile phone 4 can be improved, and the antenna element The space required to implement 116 can be reduced.

The parasitic element 121 is not limited to the meandering one shown in the present embodiment, but the same effect can be obtained even if it is linear.

FIG. 18 is a diagram showing an eighth embodiment of the vehicle interior wireless communication device according to the present invention. In this embodiment, the same components as those in the seventh embodiment will be designated by the same reference numerals and the description thereof will be omitted.

In FIG. 18, a plate-shaped resin case 131 is provided in the opening of the metal casing 111 of the vehicle interior wireless communication device 130 of this embodiment, and the resin case 131 is provided on the switch board 117. Facing the antenna element 132. The resin case 131 may also serve as the operation button similar to that of the seventh embodiment.

Further, as shown in FIG. 18C, the operation button
A meander-shaped conductor 133 is attached to the back surface of 131,
The conductor 133 has an effective length of half a wavelength. Further, a contact type power supply device 134 is provided on a portion of the switch substrate 117 facing the conductor 133, and the power supply device 134 is electrically connected to the wireless section of the transmission / reception module 115 and is substantially the same as the conductor 133. It is in contact with the central portion (the portion indicated by reference numeral 134).

In the present embodiment, the metal front panel 11
Since the meander-shaped conductor 133 integrated with the resin case 131 housed in the opening 118 of 1 can be operated as an antenna element, the space required for mounting the conductor (antenna element) 133 can be reduced. . Also, conductor 133
Can be projected inward from the switch board 117 at a predetermined distance, so that the directivity of the antenna element can be more strongly directed in the vehicle interior direction (Z direction).

As a result, the conductor 133 as an antenna element
In addition to being able to widen the bandwidth of the antenna, improve the radiation efficiency and direct the directivity toward the interior of the vehicle, and improve the wireless communication quality with the mobile phone 4, The space required for implementation can be reduced.

Although the conductor 133 is formed in a meandering shape as an antenna element, the present invention is not limited to this, and the same effect can be obtained by forming a linear shape or the like.

FIG. 19 is a diagram showing a ninth embodiment of the vehicle interior wireless communication device according to the present invention. In this embodiment, the same components as those in the seventh embodiment will be designated by the same reference numerals and the description thereof will be omitted.

In FIG. 19, a long opening 141 is formed in the metal casing 111 of the vehicle interior wireless communication device 140 of this embodiment, and the opening 141 has a length in the X direction of about half. The wavelength is formed and the length in the Y direction is formed smaller than that in the X direction. An operation button group 142 made of resin is accommodated in the opening 141, and the operation button group 142 is composed of a plurality of operation buttons 143 and a connecting portion 144 connecting the operation buttons 143. . Also,
To attach the operation button group 142 to the opening 141, house the operation button group 142 from the rear surface of the metal front panel 111,
The operation button 143 is adapted to protrude toward the passenger compartment.

A feeding point 145 is provided in the opening 141, and the feeding point 145 feeds in the short side direction (Y direction) of the opening 141. Further, in the X direction of the opening 141, it is arranged slightly in the + X direction or the −X direction from the center for impedance matching.

In this embodiment, since the opening portion 142 in which the operation button group 142 is housed can be operated as a slot antenna, the space required for mounting the antenna element can be reduced. Also metal front panel
Since the forefront of 111 can be an antenna element,
The directivity of the antenna element can be more strongly oriented in the vehicle interior direction (Z direction).

Therefore, the bandwidth of the antenna element can be widened, the radiation efficiency can be improved, and the directivity can be directed toward the passenger compartment, and the radio communication quality with the mobile phone 4 can be improved. In addition, the space required for mounting the antenna element can be reduced.

20 and 21 are views showing a tenth embodiment of a vehicle interior wireless communication device according to the present invention. In the present embodiment, the same components as those in the first embodiment are designated by the same reference numerals and the description thereof will be omitted.

In FIG. 20, a motor 151 is mounted on the main board 36 housed in the metal casing 31 of the vehicle interior wireless communication device 150, and the motor 151 drives the belt 152. This belt 152 has an antenna substrate 38
The antenna substrate 38 is moved by the belt 152 in the vehicle interior direction and in the direction away from the vehicle interior direction (Z direction). Also, antenna board
38 and the main board 36 are connected by a flexible cable 153.

A control circuit 23 having a CPU (see FIG. 2) is mounted on the main board 36.
In addition to this, a storage device such as a memory is also mounted. The transmission / reception module 39 transmits the received power value from the antenna element 37 to the control circuit 23, and the control circuit 23 transmits / receives the transmission / reception module 39.
The motor 151 is controlled according to the received power value from. In the present embodiment, the motor 151 and the belt 152 form a moving unit, and the control circuit 23 forms a received power detecting unit.

Next, the operation of the vehicle interior wireless communication device 150 will be described with reference to the flowchart of FIG.

When the antenna element 37 receives the 2.4 GHz band signal radiated from the portable telephone 4 brought into the vehicle 1, the transmitting / receiving module 39 transmits the received power value p to the control circuit 23, and the control circuit 23 stores this received power value p in a recording device such as a memory (step S1).

Then, the stored received power value p and a preset threshold value such as -70 dBm are set in the control circuit 23.
Are compared (step S2). As a result of comparison in step S2, when the received power value p is larger than −70 dBm, the control circuit 23 controls the motor 151 to move the antenna substrate 38 in the vehicle interior direction (+ Z direction), as shown in FIG.
The first state shown in is set (step S3).

On the other hand, as a result of comparison in step S2, when the received power value p is smaller than -70 dBm, the control circuit 23 controls the motor 151 to separate the antenna board 38 from the passenger compartment toward the inside of the metal housing 31. It is moved in the (-Z direction) to the second state shown in FIG. 20 (c) (step S4).

As described above, in the present embodiment, since the antenna substrate 38 can be moved toward the vehicle interior only when the mobile phone 4 to be communicated is present in the vehicle interior, the bandwidth of the antenna element 38 in the communication state is increased. , The radiation efficiency is improved, and the directivity is directed toward the interior of the vehicle, so that the quality of wireless communication with the mobile phone 4 can be improved.

In the present embodiment, the antenna element 37
Although the case where the antenna substrate 38 on which is mounted is moved has been described, the configuration may be such that only the antenna element 37 moves. Further, in the present embodiment, the programmed CPU
Although the case has been described where the antenna element 37 is moved by the control circuit 23 provided with, the user may manually move the antenna element 37 by providing only means for mechanically moving the antenna element 37.

Further, the movement of the antenna element 37 has been described in two steps, but the antenna element 37 may be moved in two or more steps so that the received power is constantly increased. Further, although the movement is made in the vehicle interior direction and the metal housing 31 inner direction (± Z direction), the movement axis is not limited to this.

Further, in this embodiment, the antenna element 37
The case where the surface of the antenna element 37 moves inside the metal casing 31 has been described, but the surface of the antenna element 37 may project from the opening 44 of the resin front panel 32. In this case, the antenna element 37 is used only during communication. The antenna element 37 can be housed when the communication device 37 is in a non-communication state by protruding 37. It goes without saying that this is effective even if the front panel is made of metal.

22 and 23 are diagrams showing an eleventh embodiment of a vehicle interior wireless communication device according to the present invention. In this embodiment, the same components as those in the tenth embodiment are designated by the same reference numerals and the description thereof will be omitted.

In FIG. 22, a main connector 161 is provided on the main board 36 of the vehicle interior wireless communication device 160 of the present embodiment, and the main connector 161 is connected to the battery of the vehicle 1, the speaker 26, or the like. There is.

The power supplied to the vehicle interior wireless communication device 160 via the main connector 161 includes a backup power supply which is always energized, and an accessory power supply which is not energized unless the ignition key is inserted and rotated. . Further, the car audio device and the car navigation device can be used by being supplied with the accessory power supply.

The control circuit 23 detects the accessory power supply voltage supplied through the main connector 161, and controls the motor 151 in accordance with the accessory power supply voltage value. There is.

Next, the operation of the vehicle interior wireless communication device 160 will be described with reference to the flowchart of FIG.

First, the control circuit 23 stores the accessory power supply voltage value Vacc supplied through the main connector 161 in a recording device such as a memory (step S11). Then
Accessory power supply voltage value Vac stored in step S11
The control circuit 23 compares c with a preset threshold value such as 10 V (step S12).

As a result of the comparison in step S12, when the accessory power supply voltage value Vacc is larger than 10 V, the control circuit 23 controls the motor 151 to move the antenna substrate 38 in the vehicle interior direction (+ Z direction) and then in FIG. The first state shown in b) is set (step S13).

On the other hand, as a result of comparison in step S12, if the accessory power supply voltage value Vacc is smaller than 10 V,
The control circuit 23 controls the motor 151 to move the antenna substrate 38 inward (in the −Z direction) of the metal housing 31 to the second state shown in FIG. 22C (step S14).

As described above, in the present embodiment, the antenna board 38 can be moved in the vehicle interior direction (Z direction) only when the accessory power supply is supplied to the vehicle interior wireless communication device 160, so that the antenna element 37 By widening the bandwidth, improving the radiation efficiency, and directing the directivity toward the interior of the vehicle, the quality of wireless communication with the mobile phone 4 can be improved.

In the present embodiment, the antenna element 37
Although the case where the antenna substrate 38 on which is mounted is moved has been described, the configuration may be such that only the antenna element 37 moves. Further, in the present embodiment, the programmed CPU
Although the case has been described in which the antenna element 37 is moved by the control circuit 23 provided with, the user may manually move the antenna element 37 by providing only means for mechanically moving the antenna element 37.

Although the movement of the antenna element 37 has been described in two steps, it may be in two or more steps. Further, although the movement is made in the vehicle interior direction and the metal housing 31 inner direction (± Z direction), the movement axis is not limited to this. Further, in the present embodiment, the case where the surface of the antenna element 37 moves inside the metal housing 31 has been described, but the surface of the antenna element 37 may project from the opening of the resin front panel 32. In this case, the antenna projects only when the accessory power is supplied, and the antenna element 37 can be stored when the accessory power is not supplied. It goes without saying that this is effective even if the front panel is made of metal.

[0147]

According to the present invention, the band width of the antenna element incorporated in the vehicle interior wireless communication device is widened, and the radiation efficiency is improved so that the directivity is directed toward the vehicle interior and the wireless communication terminal is provided. It is possible to provide an in-vehicle wireless communication device capable of improving the wireless communication quality between terminals.

[Brief description of drawings]

FIG. 1 is a diagram showing a vehicle interior wireless communication device according to a first embodiment of the present invention (a) an external schematic diagram of a vehicle equipped with the vehicle interior wireless communication device (b) an external schematic diagram of a mobile phone

FIG. 2 is a block diagram of a vehicle interior wireless communication device and a mobile phone according to the first embodiment of the present invention.

3A and 3B are diagrams showing a vehicle interior wireless communication device according to the first embodiment of the present invention, FIG. 3A is a front view of the vehicle interior wireless communication device seen from the vehicle interior, and FIG. 3B is a view A- in FIG. Section A

FIG. 4 is a view showing the vehicle interior wireless communication device according to the first embodiment of the present invention (a), a sectional view taken along the line BB in FIG. 3 (b), and (b) a resin front from the state of FIG. 3 (a). Front view of metal housing with panel removed

FIG. 5 is a diagram showing an antenna substrate of the vehicle interior wireless communication device according to the first embodiment of the present invention.

6A and 6B are views showing a vehicle interior wireless communication device according to a second embodiment of the present invention, FIG. 6A is a front view of the vehicle interior wireless communication device seen from the vehicle interior, and FIG. 6B is a view A- in FIG. Section A

FIG. 7 is a view showing a vehicle interior wireless communication device according to a second embodiment of the present invention (a) a cross-sectional view taken along the line BB of FIG. 6 (b) (b) a resin front from the state of FIG. 6 (a). Front view of metal housing with panel removed

FIG. 8 is a diagram showing an antenna substrate of a vehicle interior wireless communication device according to a second embodiment of the present invention.

FIG. 9 is a cross-sectional view of a switch board of a vehicle interior wireless communication device according to a third embodiment of the present invention.

FIG. 10 is a front view of the vehicle interior wireless communication device according to the fourth embodiment of the present invention.

FIG. 11 is a diagram showing a vehicle interior wireless communication device according to a fifth embodiment of the present invention (a) is a front view of the vehicle interior wireless communication device seen from the vehicle interior, and (b) is an A- in FIG. Section A

FIG. 12 is a view showing a vehicle interior wireless communication device according to a fifth embodiment of the present invention (a) is a cross-sectional view taken along the line BB of FIG. 11 (b) (b) is a resin front from the state of FIG. 11 (a). Front view of metal housing with panel removed

FIG. 13 is a diagram showing a current distribution and a peak point of the current of a loop antenna incorporated in the vehicle interior wireless communication device according to the fifth embodiment of the present invention.

FIG. 14 is a diagram showing a vehicle interior wireless communication device according to a sixth embodiment of the present invention (a) is a perspective view of the vehicle interior wireless communication device when the metal front panel is closed (b) shows a metal front panel opened Perspective view of the vehicle interior wireless communication device

FIG. 15 is a diagram showing a vehicle interior wireless communication device according to a sixth embodiment of the present invention (a) is a front view of the vehicle interior wireless communication device (b) is a sectional view taken along line AA of FIG.

FIG. 16 is a perspective view of an antenna board of a vehicle interior wireless communication device according to a sixth embodiment of the present invention.

FIG. 17 is a diagram showing a vehicle interior wireless communication device according to a seventh embodiment of the present invention (a) is a front view of the vehicle interior wireless communication device (b) is a sectional view taken along line AA of FIG. 17 (a).

FIG. 18 is a diagram showing a vehicle interior wireless communication device according to an eighth embodiment of the present invention (a) is a front view of the vehicle interior wireless communication device (b) is a sectional view taken along line AA of FIG. 18 (a); Rear view of resin case

FIG. 19 is a diagram showing a vehicle interior wireless communication device according to a ninth embodiment of the present invention (a) is a front view of the vehicle interior wireless communication device without the operation button group attached (b) has an operation button group attached thereto Front view of vehicle interior wireless communication device (c) External view of operation buttons

FIG. 20 is a diagram showing a vehicle interior wireless communication device according to a tenth embodiment of the present invention (a) is a front view of the vehicle interior wireless communication device seen from the vehicle interior, and (b) is an antenna substrate in a first state. A sectional view taken along the line A-A of FIG. 9A at a certain time, and FIG. 9C is a sectional view taken along the line AA of the same diagram when the antenna substrate is in the second state.

FIG. 21 is a flowchart showing movement control of antenna elements of the vehicle interior wireless communication device according to the tenth embodiment of the present invention.

FIG. 22 is a diagram showing a vehicle interior wireless communication device according to an eleventh embodiment of the present invention (a) is a front view of the vehicle interior wireless communication device seen from the vehicle interior, and (b) is an antenna substrate in a first state. A sectional view taken along the line A-A of FIG. 9A at a certain time, and FIG. 9C is a sectional view taken along the line AA of the same diagram when the antenna substrate is in the second state.

FIG. 23 is a flowchart showing movement control of antenna elements of the vehicle interior wireless communication device according to the eleventh embodiment of the present invention.

[Explanation of symbols]

3, 61, 71, 81, 110, 130, 140, 150, 160 In-vehicle wireless communication device 4 Mobile phone 22a, 143 Operation button 26 Control circuit (reception power detection means, power-on detection means) 31, 52 Metal casing 32, 72 Resin front panel (resin panel) 35 Switch board 37, 116, 132 Antenna element 38, 56, 82, 99, 117 Antenna board 39 Transmitter / receiver module 44 Opening (second opening) 47 Opening (first 1 Opening part) 53 Opening part 64, 73, 121 Parasitic element 83 Loop antenna (antenna element) 84 Transmission / reception module 92, 111 Metal front panel (metal panel) 94, 113 Operation buttons 95, 114, 120 Switch element 100, 118 , 141 Openings 101, 119, 131 Resin case 133 Conductor 134 Power feeding device 144 Connection portion 151 Motor (moving means) 152 Belt (moving means)

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁷ Identification code FI theme code (reference) H01Q 7/00 H01Q 7/00 (72) Inventor Junichi Sakai 4-3 Tsunashima East, Kohoku Ward, Yokohama City, Kanagawa Prefecture No. 1 In Matsushita Communication Industry Co., Ltd. (72) Inventor Koichi Asaka No. 3-4 Tsunashimahigashi, Kohoku Ward, Yokohama City, Kanagawa Prefecture Matsushita Communication Industry Co., Ltd. (72) Inventor Masami Makino Tsunashima, Kohoku Ward, Yokohama City, Kanagawa Prefecture Higashi 4-chome 3-1-1 Matsushita Communication Industrial Co., Ltd. F term (reference) 5J046 AA01 AA02 AA04 AA07 AA12 AA13 AB11 AB13 PA06 PA07 RA03 5J047 AA01 AA02 AA04 AA07 AA12 AA13 AB11 AB13 EA01 EA06

Claims (15)

[Claims] 1. A metal housing mounted at an arbitrary position inside a vehicle compartment, a resin panel attached to the metal housing so as to be located inside the vehicle, and provided on the resin panel, A plurality of operation buttons and a switch board formed with a conductor pattern having a switch element for detecting that the operation button is pressed; and an antenna board housed in the metal housing and having an antenna element, wherein the antenna The first metal housing is located on the front surface of the device.
A vehicle interior radio characterized by forming an opening and providing a region where the conductor pattern does not exist in the portion of the switch substrate facing the first opening or forming a second opening. Communication device. 2. A metal casing mounted at an arbitrary position inside a vehicle, a resin panel attached to the metal casing so as to be located inside the vehicle, and a resin panel provided on the resin panel, A switch board on which a conductor pattern having a plurality of operation buttons and a switch element for detecting that the operation button is pressed is formed; and an antenna board having an antenna element, wherein the antenna board is the metal housing and the An in-vehicle wireless communication device, characterized in that it is provided between switch substrates, and a region where the conductor pattern does not exist is provided or an opening is formed in a portion of the switch substrate facing the antenna element. 3. The vehicle interior wireless communication device according to claim 1, wherein a parasitic element conductor pattern different from the conductor pattern is formed on a portion of the switch substrate where the conductor pattern is removed. . 4. A metal housing mounted at an arbitrary position inside a vehicle compartment, a resin panel attached to the metal housing so as to be located inside the vehicle, and provided on the resin panel, A vehicle interior wireless communication, comprising: a switch substrate on which a conductor pattern having a plurality of operation buttons and a switch element for detecting depression of the operation button is formed; and an antenna element provided on the switch substrate. apparatus. 5. The parasitic element is formed by applying a coating material having a high metal content on the surface of the resin panel located in front of the antenna element. The in-vehicle wireless communication device according to any one of claims. 6. An antenna substrate is used as an antenna element.
The antenna includes a wavelength loop antenna and a transmission / reception module connected to the antenna element. The one-wavelength loop antenna covers the transmission / reception module at a predetermined distance from the antenna substrate in parallel with the antenna substrate. Connected to the board, and each one-quarter from the feeding point of the one-wavelength loop antenna
The in-vehicle wireless communication device according to any one of claims 1 to 5, wherein a wavelength point is arranged on the front surface of the transmission / reception module. 7. A metal housing mounted at an arbitrary position inside a vehicle compartment, a metal panel attached to the metal housing so as to be located inside the vehicle, and a plurality of metal panels provided on the metal panel. An operating button and a switch substrate on which a conductor pattern having a switch element for detecting that the operating button is pressed is formed; and an antenna element provided on the switch substrate, the antenna being provided on the front surface of the antenna element. An in-vehicle wireless communication device characterized in that an opening is formed in a portion of a metal panel. 8. A metal housing attached to an arbitrary position inside a vehicle compartment, a metal panel attached to the metal housing so as to be located inside the vehicle, and a plurality of metal panels provided on the metal panel. An operating button and a switch substrate on which a conductor pattern having a switch element for detecting that the operating button is pressed is formed, and an antenna substrate having an antenna element is provided between the switch substrate and the metal panel, An in-vehicle wireless communication device, wherein an opening is formed in a portion of the metal panel located in front of the antenna element. 9. A metal housing mounted at an arbitrary position inside a vehicle interior, a metal panel attached to the metal housing so as to be located inside the vehicle, and a plurality of metal panels provided on the metal panel. An operating button and a switch substrate on which a conductor pattern having a switch element that detects that the operating button is pressed is formed, and an opening is formed in the metal panel, and a resin case is attached to the opening. An in-vehicle wireless communication device, wherein an antenna element is formed by attaching a conductor to the back surface of the resin case, and a contact type power feeding device for exciting the antenna element is provided on the switch substrate. 10. The resin case is attached to the opening of the metal panel so as to cover the antenna element, and the resin case also serves as one of the operation buttons. 9. The vehicle interior wireless communication device according to any one of 9 above. 11. A parasitic element is formed by mounting a resin case on the opening of the metal panel so as to cover the antenna element, and applying a paint having a high metal content to the surface of the resin case. The vehicle interior wireless communication device according to claim 7, wherein the wireless communication device is a vehicle interior wireless communication device. 12. A metal housing attached to an arbitrary position inside a vehicle compartment, a metal panel attached to the metal housing so as to be located inside the vehicle, and connected by a connecting portion,
A plurality of operation buttons made of resin, an opening formed on a metal panel so that the operation buttons can be attached, and having an effective length of about half a wavelength and a width smaller than the execution length, and a width of the opening. And a power supply point provided in the direction. 13. The vehicle interior wireless communication device according to claim 1, further comprising a moving unit that moves the antenna substrate in at least two steps. 14. The reception device according to claim 13, further comprising a reception power detection unit that detects power received by the antenna element, and the moving unit moves according to a detection value detected by the reception power detection unit. Vehicle interior wireless communication device. 15. The vehicle interior radio according to claim 13, further comprising power-on detection means for detecting power-on, and the moving means moves in accordance with a detection value detected by the power-on detection means. Communication device.