JP2010028518A - Onboard television tuner - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an onboard television tuner which is easily mounted, has simple configuration and further is freely disposed at any arbitrary position for easy operation. <P>SOLUTION: The onboard television tuner 10 includes a tuner body 11, a stay 12 and a plug 13. The tuner body 11 formed by housing a circuit board 25 in a flat box-like casing 15 outputs a television broadcast wave of a digital communication system received by an antenna 18 and tuned by an operating section 16 from a video output terminal 17. The stay 12 is formed from a rod body consisting of a flexible aluminum alloy and for the stay, a synthetic resin tubular body is inserted through a bellow-shaped stay cover 14. The plug 13 is constituted of an insulated synthetic resin approximately hollow tubular body. Then, the onboard television tuner 10 is mounted by fitting the plug 13 into a cigarette lighter socket provided inside the car. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a vehicle-mounted television tuner, and more particularly to a device that receives a digital communication television broadcast wave.

Television broadcasts using digital communication systems, which have recently started broadcasting, repeat relay, amplify, and transmit multiple times compared to conventional analog television broadcasts due to digital characteristics that are resistant to noise and radio interference similar to noise. However, there is no distortion or noise mixed in the data of the television broadcast.
Here, due to the fact that radio waves are blocked by the shadows of buildings, mountains, etc., or radio waves are irregularly reflected at such places, vehicles are likely to be disturbed during movement. For this reason, when an analog television broadcast is received by the in-vehicle audio system, the noise is severe and the video is disturbed or the broadcast is interrupted.
Therefore, if the in-vehicle audio system is changed to a digital communication system, it is possible to obtain a clear video from which noise has been removed by digitization of television broadcasting.
However, if the existing in-vehicle audio system is replaced at once with a system equipped with a tuner corresponding to the digital communication method, it is costly and burdensome.
For this reason, in order to view a digital communication system television broadcast, an in-vehicle TV tuner compatible with the digital communication system is retrofitted to an existing in-vehicle monitor.
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However, since the above-mentioned in-vehicle TV tuner is retrofitted to an existing in-vehicle audio system, it is difficult to attach the in-vehicle TV tuner in a dashboard in which the in-vehicle audio system is already installed. For this reason, the installation location is limited to the feet on the passenger seat side, the glove box, or the trunk.
And when it attaches in such a place, since the handling of the wiring of a power supply or earthing ground becomes complicated, an installation operation takes time.
Further, the in-vehicle TV tuner that is retrofitted requires operation means different from the existing audio system. For example, when a remote control is provided, the in-vehicle audio system remote control and the in-vehicle TV tuner remote control are used. May cause confusion.

  Therefore, the present invention to solve the above problems provides an in-vehicle TV tuner that can be easily attached, has a simple configuration, and can be freely arranged at any position where it can be easily operated. The purpose is to do.

  An in-vehicle TV tuner according to claim 1 is provided with an input means for receiving a received television broadcast by a digital communication system, an output means for decoding and converting the television broadcast so that it can be viewed, and a broadcast channel. A vehicle-mounted television tuner provided with a tuner main body provided with a selection means for selecting, wherein a flexible stay for supporting the tuner main body at one end is provided, and provided at the other end of the stay in the vehicle A cylindrical plug that fits into the cigarette lighter socket is formed.

  According to a second aspect of the present invention, the in-vehicle TV tuner according to the first aspect of the invention is characterized in that the stay is a bar or tube made of an aluminum alloy.

  According to a third aspect of the present invention, in the in-vehicle television tuner according to the first or second aspect of the present invention, a ground terminal is formed on each of the tuner body and the plug, and both the ground terminals are provided at both ends of the stay. The tuner main body is grounded through the stay.

  According to a fourth aspect of the present invention, there is provided the in-vehicle TV tuner according to any one of the first to third aspects, wherein a stay cover through which the stay is inserted is provided, and the tuner main body and the plug are provided on the stay cover. The electric wire which connects is inserted.

  According to a fifth aspect of the present invention, there is provided the in-vehicle television tuner according to any one of the first to fourth aspects, wherein the circuit board constituting the input means, the output means, and the selection means is a flat box casing. The tuner main body is formed, and an operation unit for operating the selection means is disposed on a side surface of the casing.

  The on-vehicle TV tuner according to claim 6 is the monitor according to any one of claims 1 to 5, wherein the video and audio output by the output means are installed in the vehicle via a wire. It is characterized in that it is output to.

  According to a seventh aspect of the present invention, in the in-vehicle television tuner according to any one of the first to fifth aspects, the video and audio output by the output means are output to the monitor via radio. It is characterized by doing so.

According to the vehicle-mounted television tuner according to claim 1, the vehicle-mounted television tuner is provided with a tuner main body at one end of a flexible stay, and a plug fitted into a cigarette lighter socket at the other end of the stay. And the stay, the tuner main body, and the plug are integrated into a simple structure, so that the cost can be reduced.
Then, by inserting the plug into the cigarette lighter socket, the in-vehicle TV tuner can be easily attached.
In addition, the in-vehicle TV tuner obtains power directly from a plug inserted into a cigarette lighter socket. Therefore, it is possible to omit the work of separately wiring for the power source, and the vehicle-mounted television tuner can be easily attached.
Furthermore, by providing the flexible stay, the tuner main body can be freely arranged at any position where it is easy to operate.

  According to the on-vehicle TV tuner of the second aspect, the stay is formed in a rod or tube made of an aluminum alloy. Therefore, the flexible stay is held in a shape that is bent by the viscosity of the alloy, so that the tuner main body can be freely arranged at any position where it can be easily operated.

  According to the on-vehicle TV tuner of the third aspect, the grounding side wire can be omitted by connecting the ground terminals provided on the tuner body and the plug to both ends of the stay. Therefore, the configuration of the in-vehicle TV tuner can be simplified.

  According to the on-vehicle TV tuner of the fourth aspect, the stay and the electric wire are inserted through the stay cover. Here, the stay cover connects the stay and the wire so that the bent stay and the wire hanging between the tuner body and the plug do not fall apart when the tuner is moved to a position where it can be easily operated. Can be summarized. Therefore, the appearance of the in-vehicle TV tuner can be improved.

  According to the in-vehicle TV tuner of the fifth aspect, the operation unit is disposed on the side surface of the casing. Therefore, a broadcast channel can be selected by directly operating the tuner body without using a remote controller.

  According to the on-vehicle TV tuner of the sixth aspect, the received video and audio are output via a wire. For this reason, noise from the engine room and surrounding electronic devices installed in the car does not mix with the transmission waves that make up the video or audio, so that a clear video can be displayed on the in-vehicle monitor. It can be played back by an in-vehicle audio system.

  According to the on-vehicle TV tuner of the seventh aspect, the received video and audio are output via radio. Therefore, the received video and audio can be output to the in-vehicle monitor regardless of the installation position of the in-vehicle monitor.

  Embodiments according to the present invention will be described with reference to the accompanying drawings. FIG. 1 is a perspective view showing an in-vehicle TV tuner according to the present embodiment. FIG. 2 is a cross-sectional view showing a schematic configuration of the in-vehicle television tuner according to the present embodiment.

The in-vehicle TV tuner 10 includes a tuner main body 11, a stay 12, and a plug 13.
As shown in FIG. 2, the tuner body 11 is formed by housing a circuit board 25 in a flat box-shaped casing 15.
The casing 15 is provided with an operation unit 16 on the front surface, and the operation unit 16 includes channel selection keys 16a and 16b and a search button 16c. A telescopic antenna 18 that receives a digital communication system television broadcast wave is formed on the top surface, and an external antenna that receives a digital communication system television broadcast output from the external antenna is formed on the left side surface. A terminal 19 is formed. Furthermore, a video output terminal 17 drawn from the lower surface via a cable is provided, and the video output terminal 17 includes a video output terminal 17a and audio output terminals 17b and 17c.
As shown in FIG. 2, a stay receiving portion 20 to which the stay 12 is fitted and fixed is formed on the lower surface of the casing 15.

The circuit board 25 is provided with input means and output means.
The input means receives a digital broadcast television broadcast received by the antenna 18 or a digital broadcast television broadcast received by the external antenna and input to the external antenna terminal 19. On the other hand, the output means decodes and converts the television broadcast so as to be viewable, forms a video output signal composed of a video signal and an audio signal, outputs the video signal from the video output terminal 17a of the video output terminal 17, The audio signal is output from audio output terminals 17 b and 17 c of the video output terminal 17.
The circuit board 25 is provided with a power supply terminal 26 and a ground terminal 27.
The power supply terminal 26 is supplied with a 12V on-vehicle power supply through a plug from a cigarette lighter socket. On the other hand, the ground terminal 27 is connected to the end of the stay 12 and grounds the circuit board 25 via the stay 12 and the plug 13.

The stay 12 is made of a flexible aluminum alloy rod. The aluminum alloy can be held in a bent shape. Therefore, by bending the stay 12, the tuner main body 11 can be freely arranged at an arbitrary position where it can be easily operated. The stay 12 is not limited to a rod body, and may be formed from a tube.
The stay 12 is inserted through a stay cover 14 made of synthetic resin.
The stay cover 14 is formed in a bellows-like cylinder. The cylindrical body is not limited to the bellows shape, and for example, a flexible rubber tube or the like may be used.

  Also, a ground terminal 27 provided on the tuner body is connected to one end of the stay 12 by a screw 36, and a ground terminal 32 of a plug described later is connected to the other end of the stay 12 by a screw 36. Thus, the stay 12 constitutes a part of a ground circuit that grounds the circuit board 25.

The plug 13 is made of a substantially hollow cylindrical body made of synthetic resin having insulating properties.
As shown in FIG. 2, a stay receiving portion 34 to which the stay 12 is fitted and fixed is formed in the upper surface opening of the plug 12.
An electrode 33a urged by a spring protrudes from the opening on the lower surface of the plug 12, and an electrode 33b made of a conductive plate spring protrudes from the side surface.
When the plug 13 is fitted to the cigarette lighter socket, the electrode 33a contacts the heating wire portion of the cigarette lighter socket, and a 12V or 24V on-vehicle power supply is input. On the other hand, when the electrode 33b is fitted, the electrode 33b contacts the inner wall of the cigarette lighter socket and is grounded to the vehicle body via the inner wall.

As shown in FIG. 2, a power terminal 30, a fuse 31, and a ground terminal 32 are accommodated in the hollow portion of the plug 13.
The power terminal 30 is provided at one end of the fuse 31, and the power terminal 26 of the tuner body is connected by an electric wire 35. The other end of the fuse 31 is connected to the electrode 33a.

  On the other hand, the ground terminal 32 is provided at the upper end of the electrode 33 b and is connected to the stay 12 by a screw 36. Thus, the circuit board 25 is grounded from the ground terminal 27 of the tuner body 11 to the vehicle body via the stay 12, the ground terminal 32 of the plug 13, and the electrode 33b.

The in-vehicle television tuner 10 having the above configuration is used as follows.
The on-vehicle TV tuner 10 is attached by fitting the plug 13 to a cigarette lighter socket provided in the vehicle.
The in-vehicle television tuner 10 attached receives the television broadcast by the digital communication system with the antenna 18, and the received television broadcast is input to the input means of the circuit board 25. Then, it is decoded and converted so as to be viewable by the output means and output as a video output signal.
The video output terminal 17 is connected to an external input of an existing in-vehicle audio system having an in-vehicle monitor, and a desired broadcast channel is selected and determined by the channel selection keys 16a and 16b or the search button 16c of the operation unit 16.
Thereby, the television broadcast by a digital communication system can be viewed on the vehicle-mounted monitor.

  According to the present embodiment, the in-vehicle TV tuner 10 is attached to the cigarette lighter socket and driven by the in-vehicle power source. Therefore, the wiring work to the drive power supply of the existing in-vehicle audio system can be omitted, and the in-vehicle TV tuner 10 can be easily attached. And when it attaches in that way, the tuner main body 11 can be made still so that it may operate easily in the arbitrary positions before a dashboard.

  In addition, by connecting the video output terminal 18 to an external input terminal of an in-vehicle audio system having an in-vehicle monitor, a clear image free from noise of a television broadcast by a digital communication method can be displayed on the in-vehicle monitor. It is possible to output a clear voice without any in-vehicle audio system.

  Furthermore, since the channel selection keys 16a and 16b or the search button 16c of the operation unit 16 are directly operated without providing a remote controller, malfunctions can be reduced and channel selection can be performed easily. it can.

  Here, in this embodiment, a television broadcast by a digital communication system is received by the antenna 18. However, when it is desired to receive with stable communication quality, a separate external diversity antenna is provided on the vehicle body, and a television broadcast by the digital communication method received by the external diversity antenna is input from the external antenna input terminal 20 to the input means of the circuit board 25. Can be entered.

An in-vehicle TV tuner according to a second embodiment will be described with reference to FIG.
The in-vehicle TV tuner 10A according to the present embodiment includes a tuner main body 11A, a stay 12, and a plug 13. Here, the stay 12 and the plug 13 are configured in the same manner as in the first embodiment. Therefore, explanation is omitted.

The tuner main body 11 </ b> A is formed by housing a circuit board 25 </ b> A in a flat box-shaped casing 15.
As in the first embodiment, the casing 15 is provided with an operation unit including selection keys 16a and 16b and a search button 17, an antenna 19, and an external antenna input terminal 20.

The circuit board 25A is provided with input means as in the first embodiment.
Here, the output means of the circuit board 25A is provided with a wireless output function.
The wireless output function converts a video output signal composed of a video signal and an audio signal formed by decoding and converting received television broadcast so as to be viewable, and outputs the radio wave in a frequency band of the UHF band. The converted UHF wave is output from the transmission antenna 40 provided on the circuit board 25 </ b> A in the casing 15.

The mounting method of the in-vehicle TV tuner having the above configuration and the receiving method of the television broadcast are the same as in the first embodiment. Therefore, explanation is omitted.
Here, the video output signal output from the output means of the circuit board 25A is transmitted from the transmitting antenna in the UHF band. Since the radio waves in the UHF band are used for television broadcasting by the conventional analog communication system, they can be received by the television antenna of the existing in-vehicle audio system, and the television broadcasting by the digital communication system is displayed on the in-vehicle monitor. be able to.

  According to the in-vehicle TV tuner according to the present embodiment, it is possible to view a digital communication television broadcast on an existing in-vehicle TV regardless of the installation location of the in-vehicle monitor. Further, even if the in-vehicle monitor or the in-vehicle audio system does not have an external input terminal, it is possible to input a television broadcast by a digital communication system through a conventional television antenna.

As described above, according to the in-vehicle TV tuners according to the first embodiment and the second embodiment, the tuner main body and the plug are fixed to the both ends of the stay, respectively. Can be suppressed.
Further, by inserting the plug into a cigarette lighter socket in the vehicle, a power source can be easily secured and can be easily attached.

It is a perspective view which shows the vehicle-mounted television tuner which concerns on 1st Example. It is a schematic sectional drawing which shows schematic structure of the vehicle-mounted television tuner which concerns on 1st Example. It is a perspective view which shows the vehicle-mounted television tuner which concerns on 2nd Example.

Explanation of symbols

10, 10A: In-vehicle TV tuner, 11, 11A: Tuner body, 12: Stay, 13 ... Plug, 14 ... Stay cover, 15 ... Casing,
DESCRIPTION OF SYMBOLS 16 ... Operation part, 16a, 16b ... Channel selection key, 16c ... Search button, 17 ... Video output terminal, 17a ... Video output terminal, 17b, 17c ... Audio | voice output terminal, 18 ... Antenna, 19 ... External antenna input terminal, 20 ... Tuner side stay receiver,
25, 25A ... circuit board, 26 ... tuner main body side power terminal, 27 ... tuner main body side ground terminal,
30 ... Plug side power supply terminal, 31 ... Fuse, 32 ... Plug side ground terminal, 33a, 33b ... Electrode, 34 ... Plug side stay receiving part,
35 ... Electric wire, 36 ... Screw,
40: Transmitting antenna.

Claims (7)

A tuner main body provided with input means for inputting a received television broadcast by a digital communication system, output means for decoding and converting the television broadcast so that it can be viewed, and selection means for selecting a broadcast channel An in-vehicle TV tuner,
A flexible stay that supports the tuner body at one end is provided,
A vehicle-mounted television tuner characterized in that a cylindrical plug that fits into a cigarette lighter socket provided in the vehicle is formed at the other end of the stay.   The in-vehicle TV tuner according to claim 1, wherein the stay is a bar or a tube made of an aluminum alloy.   The grounding terminal is formed in each of the tuner body and the plug, the grounding terminals are joined to both ends of the stay, and the tuner body is grounded through the stay. Item 3. A vehicle-mounted television tuner according to Item 2.   The in-vehicle television according to any one of claims 1 to 3, wherein a stay cover for inserting the stay is provided, and an electric wire for connecting the tuner body and the plug is inserted into the stay cover. tuner.   The circuit board constituting the input means, the output means and the selection means is housed in a flat box-shaped casing to form the tuner body, and an operation portion for operating the selection means is disposed on the side of the casing. The in-vehicle TV tuner according to any one of claims 1 to 4, wherein the in-vehicle TV tuner is characterized.   6. The in-vehicle television according to claim 1, wherein the video and audio output by the output means are output to a monitor installed in the vehicle via a wire. tuner.   6. The in-vehicle TV tuner according to claim 1, wherein the video and audio output by the output means are output to the monitor via radio.

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