CN202782895U

CN202782895U - Automobile audio equipment

Info

Publication number: CN202782895U
Application number: CN 201220341175
Authority: CN
Inventors: 张建明
Original assignee: JIANGMEN AUDIOVISIO ELECTRONICS CO Ltd
Current assignee: JIANGMEN AUDIOVISIO ELECTRONICS CO Ltd
Priority date: 2012-07-13
Filing date: 2012-07-13
Publication date: 2013-03-13
Anticipated expiration: 2022-07-13

Abstract

The utility model discloses automobile audio equipment which comprises a main unit, a shell, a key panel, a power source, a receiving antenna and a loudspeaker. The main unit is arranges inside the shell of the audio equipment, main circuits of the main unit include a microprocessor circuit, an MP3 (moving picture experts group audio layer-3) decoding unit circuit, a radio circuit, a display screen circuit, a power amplifying circuit, a power management circuit, an ACC (automatic amplitude control) circuit, a key circuit, a lamplight/backlight circuit, an audio source input interface circuit and the like and are manufactured on a PCB (printed circuit board), and the MP3 decoding unit circuit, the radio circuit, the display screen circuit, the power amplifying circuit, the power management circuit, the ACC circuit, the key circuit, the lamplight/backlight circuit, the audio source input interface circuit and the like are respectively connected with the microprocessor circuit. The automobile audio equipment has the advantages that connecting wires among the circuits are reduced, the quality and the stability of the product can be effectively improved, the cost is reduced by 30% at least as compared with the original cost; and the power amplifying circuit is a radiating-free AB/D-class power amplifying module, the AB/D-class power amplifying module is low in heating, a special radiating fin can be omitted, and the AB/D-class power amplifying module has an overheating protection function, and accordingly is high in performance and reliability as compared with an A-class power amplifying module or a B-class power amplifying module.

Description

A kind of auto audio equipment

Technical field

The utility model relates to a kind of auto audio equipment.

Background technology

Auto audio equipment as the repacking in the standard fitting of automobile and later stage decoration market, has sizable volume of production and marketing at automobile and component market always.Also have numerous producers to research and develop specially and produce various auto audio equipment products, the style of product and function are more and more perfect.Yet the price of auto audio equipment is but dropping always, so that the profit margin of each manufacturer is more and more less.So each producer is all doing better product function, performance and price is done lowlyer again by every means.So just can in the market competition of fierceness, show one's talent, become best-selling product.

Because auto audio equipment is subject to the interference of other electrical equipment in the car easily, its product uses category-A or category-B power amplifier always, and the cal val of this power amplifier is large, and special radiating gill need be arranged, and the structure of product also is fixed mode; Therefore, the use cost of this power amplifier is relatively expensive.And AB/D class power amplifier, because its efficient is high, cal val is low, and overheating protection is arranged, and does not also need the special advantages such as radiating gill; Therefore, on a lot of household products and mobile digital product, be widely used.Use the auto audio equipment of AB/D class power amplifier, do not need special radiating gill, therefore the structure of pcb board has also done great improvement; Simultaneously, also can disturb the issue handling of radio station good D class power amplifier; Use the auto audio equipment of AB/D class power amplifier, its Costco Wholesale will reduce more than 30% than original use category-A or category-B power amplifier.Therefore, more can adapt to the demand in market, cost performance more has superiority.

The utility model content

The technical problems to be solved in the utility model provides a kind of low heat emission, stable high, inexpensive auto audio equipment.

For solving the problems of the technologies described above, the technical solution adopted in the utility model is: a kind of auto audio equipment comprises main frame, shell, key panel, power supply, receiving wire and loudspeaker.Main frame places casing of sound equipment inner, described host circuit comprises and all is made in microprocessor, MP3 decoding unit, radio reception circuit, read-out, power amplification circuit, power management, ACC control circuit, key circuit, light/backlight, a source of sound input interface on the PCB, and is connected with microprocessor respectively.Described power amplification circuit is the AB/D class power amplifier module of exempting to dispel the heat.

Further, described radio reception circuit is supported electronic tuning radio reception, automatic search storage radio station, and spectrum conversion and direct upper and lower radio station are selected.

Further, the sound equipment normal operation is in the 9-18V low voltage range.

The beneficial effects of the utility model: the power amplification circuit of sound equipment adopts AB/D class power amplifier module, because AB/D class power amplifier cal val is little, can exempt special radiating gill, and AB/D class power amplifier has overheating protection, the power amplifier of its performance and reliability ratio category-A or category-B is more reliable; Structure is relatively simpler, only just can make a machine with a pcb board; Reduced the connection wire between the circuit, more can improve the quality of products and stability, made Costco Wholesale than original reduction more than 30%.

Description of drawings

Below in conjunction with accompanying drawing the specific embodiment of the present utility model is described further.

Fig. 1 is the functional block diagram of the utility model auto audio equipment;

Fig. 2 is the key panel planar view of this experiment novel automobile acoustic;

Fig. 3 is the host microprocessors circuit diagram of this experiment novel automobile acoustic;

Fig. 4 is the key panel circuit diagram of this experiment novel automobile acoustic;

Fig. 5 is the external loudspeaker circuit diagram of this experiment novel automobile acoustic;

Fig. 6 is power management and the rectifying circuit figure of this experiment novel automobile acoustic;

Fig. 7 and Fig. 8 are two kinds of power amplification circuit figure of this experiment novel automobile acoustic.

The specific embodiment

Fig. 1 is a kind of auto audio equipment, comprises main frame 1, shell 2, key panel 3, power supply 4, receiving wire 5 and loudspeaker 6.Main frame 1 places casing of sound equipment 2 inside, host circuit comprises that the main circuits such as microprocessor 7, MP3 decoding unit 8, radio reception circuit 9, read-out 10, power amplification circuit 11, power management 12, ACC control circuit 13, key circuit 14, light/backlight 15, source of sound input interface 16 all are made on the PCB, and be connected with microprocessor 7 respectively, this structure has reduced the connection wire between the circuit, more can improve the quality of products and stability, make Costco Wholesale than original reduction more than 30%.Source of sound input interface 16, radio reception module by wherein are transported to MP3 decoding unit 8 with the sound signal that receives, and output to power amplification circuit 11 by microprocessor 7 controls again and carry out outputing to after audio frequency is processed loudspeaker 6 and play.The power amplification circuit 11 AB/D class power amplifier module for exempting to dispel the heat because AB/D class power amplifier cal val is little, can be exempted special radiating gill, and AB/D class power amplifier has overheating protection, and the power amplifier of its performance and reliability ratio category-A or category-B is more reliable.Sound equipment comprises panel membrane keyboard and two kinds of operation modes of infrared remote control, works in the 9-18V low voltage range horsepower output: two sound channel 2*7W.

Fig. 2 is a kind of key panel planar view of auto audio equipment, key panel 3 comprises that volume+17, volume-18, power supply 4, a upper song 19, next song 20, SD interface 21, mode button 22, display button 23, band selection/automatic channel search button 24, audio arrange button 25, USB interface 26, volume knob 27.Sound equipment is supported SD card/USB/AUX interface, and the MP3 music format is play, upper and lower selected songs function, and electronic tuning radio reception, automatic search storage radio station, spectrum conversion and direct upper and lower radio station are selected; Audio arranges button 25 and realizes that working mode change, pause function, EQ audio arrange function; Display button 23 comprises time showing, frequency demonstration, song demonstration and backlight function; Volume adjusting comprises knob volume and button regulatory function.

The above only is preferential embodiment of the present utility model, and the utility model is not limited to above-mentioned embodiment, as long as realize that with basic identical means the technical scheme of the utility model purpose all belongs within the protection domain of the present utility model.

Claims

1. auto audio equipment, comprise main frame (1), shell (2), key panel (3), power supply (4), receiving wire (5) and loudspeaker (6), main frame (1) places casing of sound equipment (2) inside, it is characterized in that: described host circuit comprises and all is made in a microprocessor (7) on the PCB, MP3 decoding unit (8), radio reception circuit (9), read-out (10), power amplification circuit (11), power management (12), ACC control circuit (13), key circuit (14), light/backlight (15), source of sound input interface (16), and be connected with microprocessor (7) respectively; The AB/D class power amplifier module of described power amplification circuit (11) for exempting to dispel the heat.

2. a kind of auto audio equipment according to claim 1 is characterized in that: the radio reception of described radio reception circuit (9) support electronic tuning, automatic search storage radio station, spectrum conversion and direct upper and lower radio station selection.

3. a kind of auto audio equipment according to claim 1, it is characterized in that: described sound equipment operating voltage is 9-18V.