CN2838193Y

CN2838193Y - Onboard sound device

Info

Publication number: CN2838193Y
Application number: CN 200520107428
Authority: CN
Inventors: 王颂怡
Original assignee: Individual
Current assignee: Individual
Priority date: 2005-05-26
Filing date: 2005-05-26
Publication date: 2006-11-15
Anticipated expiration: 2015-05-26

Abstract

The utility model relates to a sound device on vehicles, which belongs to the field of sound equipment. The utility model comprises an outer housing and a circuit board in the housing, wherein a front panel of the outer housing is provided with a program display screen of which the side is provided with sequence selection keys and an inserting port for a memory chip card; the low side of the outer housing is provided with a telescopic switch key and a groove opening which is used for the access of a telescopic keyboard, and the telescopic switch key controls the telescopic keyboard which is provided with numeral keys for selecting the program; the circuit board in the housing comprises a flash memory chip circuit which is used for an MP 3 digital playing function, and also comprises a playing control part which is connected with a microprocessor part and a digital information memory chip; when converted and amplified via a digital over power, audio signals are transmitted to a loudspeaker to be sent out. With adopting the advanced MP 3 audio signal compressed format, the utility model has the advantages that the device can store 10 times or more the original music capacity, the effect of the sound quality is good, the energy consumption is saved and the device is convenient in use on vehicles.

Description

A kind of vehicle audible device

Technical field

The utility model belongs to the stereo set field, specially refers to a kind of vehicle audible device that is used on the automobile.

Back of the body amount technology

Hoot device extensively uses on all kinds of automobiles already maturely, and the major part in the equipment is to play main frame and loudspeaker, when us a slice CD is coiled and puts into the broadcast main frame, and the frequency of CD disc sample rate is 44.1MHZ, 16Bits, and data volume is 1.4Mbps; The duration that a slice CD dish is play in the driving not length will change new building, drive to travel for long distance, just feel loaded down with trivial details and inconvenient.And if adopt the Mp3 playback, it is to aim at the acoustic compression tone signal and a kind of new audio signal compression format standard that designs, corresponding data volume is 112kbps or 128kbps, be compressed into 1/12 of original data volume, that is to say a traditional CD dish, change and make the music that MP3 just can deposit capacity more than 10 times, the auditory effect of people's ear shows no sign of reduction in the use, and the energy that it consumed is few.Therefore it has the advantages that to be very suitable for portable broadcast, requires the use of a kind of vehicle audio of broadcast continuously in being suitable for driving a vehicle during no far adjustment audio disk.Because utilizing digital signal processor DSP (Digital Sing Processor) to finish, the MP3 player handles transmission and decoding mp3 file task, and in the existing technology, it is digital that automobile audio is play the most right and wrong of main frame, employed music tape, CD disc record, MD dish etc. all belong to nonnumeric formula to be play, and the MP3 player then belongs to digital broadcast.In traditional stereo set, some player carries or built-in amplifirer, and when some people want to appreciate the better music of tonequality in car, then at plug-in power amplifier of automobile inside, and the design had adopted the digital power amplifier ability that includes.The utility model vehicle audible device aims at and is applicable to automobile and designs, and provides a kind of supporting processing unit structure small and exquisite, that can play and receive digital signal in the anterior narrow space of steering position.This device can also possess other advanced functions on effect simultaneously.Development and exploitation are a kind of like this to improve the digital vehicle audible device of Multifucntional in a step with result of use, is the design people's original intention.

Summary of the invention

The utility model technical issues that need to address are, in traditional on-vehicle acoustic apparatus, majority is the messaging model that belongs to nonnumeric formula, its function singleness, and broadcast time is of short duration, is not suitable for long use apart from the motorist etc., has many weak points.In order to overcome these deficiencies, will redesign a kind of device of practicality.The purpose of this utility model just provides a kind of vehicle audible device, and this device can not only be given the fine enjoyment of music, and brings great convenience and the saving of energy for the person's of driving use.

The purpose of this utility model realizes by the following technical solutions, a kind of vehicle audible device comprises it is characterized in that the circuit board of an outer cage and casing inside, a program display is housed on the outer cage front panel, and there are sequence selection key and storage core card insert opening in this screen side; Bottom is provided with the groove cave and the flexible on ﹠ off switch of coming in and going out for the keyboard of stretching, contract, the described keyboard of stretching, contract that is furnished with the channel selection numerical key of this on ﹠ off switch control; On the circuit board of described casing inside, contain the flash chip circuit that is useful on MP3 digital broadcast function, also include the transmit control module part in this circuit board, it is connecting the microprocessor module part, be connected to digital information storage flash chip module by this microprocessor module, and be connected to the special audio dsp chip by decoder, digital signal by this chip output is changed and amplification module through signal driver module and digital power, delivers to loudspeaker output.The described keyboard of stretching, contract, it controls its two kinds of location statuss of stretching, contract by the keyboard switch that the machine shell panel below is provided with.Under the state that keyboard is stretched out, can see the channel selection button of set 0～9 bit digital in card left side, the right side is provided with one for detecting the depression that fingerprint is used, and it links to each other with microprocessor in the chip circuit by the infrared sensor that is located in the casing.This device just can be connected feeder line after fingerprint examination is qualified, otherwise promptly realizes this device self-locking.

The beneficial effects of the utility model are, this device adopts advanced MP3 audio signal compression form and uses digital power amplifier, not only can deposit 10 times of original music capacity even higher, and phoneme, acoustical quality are good, energy efficient, the utmost point are convenient to vehicle-mounted use.

Description of drawings

Fig. 1 is this device appearance schematic diagram;

Fig. 2 installs the annexation block diagram of inner contained each several part for this;

Fig. 3 is that flexible keyboard launches schematic diagram on the front panel of this device;

Fig. 4 a～4b is a device internal circuit layout.

Embodiment

With reference to Fig. 1, represent this device appearance schematic diagram, the outer cage of vehicle audible device is 1 among the figure, electronic circuit board 3 is equipped with in this casing inside, the middle part of casing front panel 2 is a program display screen 2.1, the panel upper right side is provided with a flash chip and inserts mouth 2.2, the MP3 chip of typing music is this device of mouth insertion from then on just, there is program sequence options button 2.3 the socket below, its underpart is provided with a flexible keyboard on ﹠ off switch 2.4, it controls an indentation from groove cave 2.5, the keyboard that stretches out also is provided with infrared receiving aperture 2.7 and mains switch 2.8 in the bottom of machine shell panel 2.With reference to Fig. 2, be annexation block diagram between each module on this device internal circuit board, include the transmit control module part among this figure, it is connecting the microprocessor module part, be connected to digital information storage flash chip module by this microprocessor module, and be connected to the special audio dsp chip by decoder, through signal driver module and digital power conversion and amplification module, deliver to loudspeaker output by the digital signal of this chip output.With reference to Fig. 3, can see flexible card 2.6, be provided with the ten key 2.61 of radio station adjustment frequency in this keyboard disk left side, the card right side also is provided with one for detecting the depression 2.62 that fingerprint is used, through the fingerprint authentication person of meeting, and can energized, with reference to Fig. 4 a-Fig. 4 b, represent that this installs the circuit theory diagrams of inner used circuit board 3, Fig. 4 a is the normal MP3 playback circuit figure that uses in the prior art, and Fig. 4 b is normal digital power conversion and the amplifying circuit that uses in the prior art.This circuit can improve the intensity and the tonequality of used audio signal.

Claims

1. vehicle audible device comprises the circuit board of an outer cage and casing inside it is characterized in that a program display is housed, and there are sequence selection key and storage core card insert opening in this screen side on the outer cage front panel; Bottom is provided with the groove cave and the flexible on ﹠ off switch of coming in and going out for the keyboard of stretching, contract, the described keyboard of stretching, contract that is furnished with the channel selection numerical key of this on ﹠ off switch control; On the circuit board of described casing inside, contain the flash chip circuit that is useful on MP3 digital broadcast function, also include the transmit control module part in this circuit board, it is connecting the microprocessor module part, be connected to digital information storage flash chip module by this microprocessor module, and be connected to the special audio dsp chip by decoder, digital signal by this chip output is changed and amplification module through signal driver module and digital power, delivers to loudspeaker output.

2. vehicle audible device according to claim 1 is characterized in that, the described keyboard of stretching, contract, and it controls its two kinds of location statuss of stretching, contract by the on ﹠ off switch that the machine shell panel below is provided with.

3. vehicle audible device according to claim 1, it is characterized in that, under the state that keyboard is stretched out, can see the channel selection case of set 0～9 bit digital in card left side, the right side is provided with one for detecting the depression that fingerprint is used, and it links to each other with microprocessor in the chip circuit by the infrared sensor that is located in the casing.