CN2395489Y

CN2395489Y - Small active heavy bass voice box

Info

Publication number: CN2395489Y
Application number: CN 99215109
Authority: CN
Inventors: 林智文
Original assignee: Individual
Current assignee: Individual
Priority date: 1999-06-14
Filing date: 1999-06-14
Publication date: 2000-09-06
Anticipated expiration: 2009-06-14

Abstract

The utility model discloses a miniature and active heavy-bass voice box, which is composed of a voice box body, a phase-reversal sound reversing tube arranged in the voice box body, a woofer, an amplifier circuit, a stereo signal input socket, an input signal transfer switch and a metal plate. A miniature and active heavy-bass voice box is characterized in that the voice box body comprises a full-closed holding cavity and a semi-closed holding cavity, the inner part of the full-closed holding cavity is provided with the phase-reversal sound reversing tube and the woofer with (5 to 7) inches, the inner width of the voice box body is matched with the caliber size of the woofer with (5 to 7) inches, and the semi-closed holding cavity is provided with the amplifier circuit, the metal plate, the signal input socket and the input signal transfer switch. The utility model has the advantages of simple structure, small size and good bass replaying effect, is matched with other various small left and right-soundtrack voice boxes with different types, and forms a stereo active voice box with high fidelity. The utility model can be used on a sound and view system of a miniature household cinema and a computer multimedia, and is an ideal miniature and active heavy-bass voice box.

Description

Small-sized active super bass box

The utility model relates to a kind of super bass box, and especially a kind of small-sized active super bass box is the stereo set field.

Super bass box in the market for the bass of resetting, all used the loud speaker of larger caliber and the casing of larger volume, thereby volume is all bigger; Though supply CD-audio player on the market, the various little audio amplifier style that walkman and the playback of PC audio cards are used is a lot, and the combined acoustics that has super bass box is wherein arranged, and all is that bass can be reset usually, and the audio amplifier volume is just bigger; If volume is less, then tonequality or bass effect are just poor, and cost is higher, moreover that the volume of this class casing does not still reach is desirable small-sized.

The utility model applicant once proposed a kind of small-sized active super bass box in patent No. ZL 98 211074.X, he can form small-sized stereo reproducing system with the little audio amplifier of small-sized left and right acoustic channels, emitting clear stereo with small-sized stereo reproducing system in less space.In above-mentioned technical solution, the utility model applicant is with the different homemade conventional 4 inches woofers of many moneys, all reached the effect that bass is low to moderate 56Hz.

In the use as family movie institute, sound dynamic change amplitude is bigger, and when listening to environment when big, bass power needs bigger.Since conventional 4 inches woofers to bear power not too large, 4 inches woofer prices that power is bigger are very expensive, do not conform to the low-cost high-grade aim of this product design.

The purpose of this utility model is to avoid above-mentioned weak point of the prior art and a kind of small-sized active super bass box is provided.Through experiment, adopt homemade conventional 6.5 inches woofers after, bearing power can increase, but the size of small-sized Super Bass Loudspeaker Enclosure still be can yet be regarded as small-sized.

The purpose of this utility model can reach by following measure: a kind of small-sized active super bass box, by sound box and the paraphase sound guide tube that places in it, woofer, amplifier circuit, metallic plate, the 2 pairs of signal input sockets and input signal change over switch are formed.Sound box includes totally-enclosed cavity volume and semiclosed cavity volume, places paraphase sound guide tube and (5～7) inch woofer in totally-enclosed cavity volume, is equipped with amplifier circuit at semiclosed cavity volume, metallic plate, the 2 pairs of signal input sockets and input signal change over switch.The inner width of sound box matches with the caliber size of (5～7) inch woofer.

In above-mentioned technical solution, the outlet of paraphase sound guide tube open with boxboard that loud speaker is connected on, the arrival end of its paraphase sound guide tube stretches to the boxboard on the boxboard opposite that loud speaker is connected, and presses close to this boxboard.

Amplifier circuit includes the sound field expanded circuit, low frequency lattice network, LF power amplifier, left and right acoustic channels amplifying circuit, back surround sound treatment circuit and back surround channel amplifying circuit.The signal input socket has 2 pairs, and the sound field expanded circuit is obtained signal by the input signal change over switch from 1 pair of signal input socket wherein.The low frequency supper bass, left and right acoustic channels and back surround sound are regulated its volume by potentiometer respectively.The direct-connected knob of control footstalk of the volume control potentiometer of amplifier circuit stretches to outside the casing.In amplifier circuit, the power amplifier integrate circuit of buying easily on the market has been adopted in back level power amplification.

When the amplifier circuit of this small-sized active super bass box only includes low frequency lattice network and LF power amplifier, can cooperate with the little audio amplifier of other various dissimilar active left and right acoustic channels, to remedy the deficiency of bass

Description of drawings is as follows

The small-sized active super bass box major side views of Fig. 1 the utility model

The small-sized active super bass box of Fig. 2 the utility model top cutaway view

The circuit block diagram of the small-sized active super bass box of Fig. 3 the utility model

The utility model is described in further detail below in conjunction with drawings and Examples:

With reference to figure 1, Fig. 2; Fig. 2 is as the A-A cutaway view among Fig. 1.Casing 1 is by

boxboard

6,7, side box plate 20,21, and top boxboard 4 and under casing plate 5 are formed, and boxboard 7 is divided into totally-enclosed cavity volume 2 and semiclosed cavity volume 3 to casing 1.In totally-enclosed cavity volume 2, place paraphase sound guide tube 10 and 6.5 inches woofers 9.The caliber size of the inner width of sound box and 6.5 inches woofers matches.

In Fig. 1, be equipped with amplifier circuit 14 and metallic plate 13 at semiclosed cavity volume 3.At totally-enclosed cavity volume 2, the outlet 12 of paraphase sound guide tube 10 open with boxboard 6 that loud speaker 9 is connected on, its arrival end 11 stretches to the boxboard 7 on boxboard 6 opposites that loud speaker 9 is connected, and presses close to this boxboard 7.The outlet 12 of paraphase sound guide tube 10 is led to outside the audio amplifier.Like this, 10,6.5 inches woofers 9 of paraphase sound guide tube and totally-enclosed cavity volume 2 can be designed to best replaying bass effect.

The actual caliber size of above-mentioned 6.5 inches woofers can be 5～7 inches.

At Fig. 1, among Fig. 2, semiclosed cavity volume 3 is equipped with amplifier circuit 14 and metallic plate 13.Metallic plate 13 is positioned in the opening part of semiclosed cavity volume 2, by screw 15 metallic plate 13 is fixed on the sound box 1.Be welded with stereo signal input socket 17 on the circuit board of amplifier circuit 14 respectively, loud speaker output interface 28, input signal change over switch 18, potentiometer 16, integrated circuit 19, indicator light and resistance, electronic components such as electric capacity.By stereo signal input socket 17, loud speaker output interface 28, input signal change over switch 18, potentiometer 16, integrated circuit 19 screw on metallic plate 13 links, and the circuit board of amplifier circuit 14 is fastened on metallic plate 13.Integrated circuit 19 also outwards dispels the heat by metallic plate 13.Mains switch and DC supply socket are fastened on the metallic plate 13 by screw.The potentiometer 16 of amplifier circuit, the footstalk of input signal change over switch 18 directly pass metallic plate 13 and stretch to outside the casing 1, and knob is fastened on the footstalk of potentiometer 16.The DC plug of power transformer, the electric wire of left and right acoustic channels audio amplifier and other signal electric wires can directly insert each socket on the metallic plate 13.On the Speaker panel 8 outside the boxboard 6 baffle cloth or wire netting are housed.

In Fig. 1, also can be with potentiometer 16, mains switch, indicator light passes via boxboard 6 by electric wire, comes Switching Power Supply and control volume by the left direction in the view 1.Here, Speaker panel 5 also can make parts by plastic cement.

Fig. 3 is a circuit block diagram, signal is by stereo signal input socket 17 inputs, through input signal change over switch 18, be input to sound field expanded

circuit

22,22 outputs of sound field expanded circuit divide transfer to left and right acoustic channels audio amplifier circuit 23 at 3 the tunnel: the one tunnel, connect to outside left and right acoustic channels audio amplifier SP1, SP2 by loud speaker output interface 28 again; One the tunnel transfers to low frequency lattice network 24, transfers to bass power amplification circuit 25 again, meets the woofer SP3 in casing then; One the tunnel transfers to back surround sound treatment circuit 26, transfers to back surround channel audio amplifier circuit 27 again, meets surround channel audio amplifier SP4 behind the outside, SP5 by loud speaker output interface 28 then.

External stereo source such as computer multi-media and SVCD are by stereo signal input socket 17 inputs.The number of stereo signal input socket also can be increased to 3 or 4 by 2, selects input socket by the input signal change over switch, thereby selects different signal source signals, and the input signal change over switch is used 2 * 3 cuttves or 2 * 4 cuttves instead.Like this, very convenient to choosing of source of sound.

Power transformer can be used as an external annex, also can be placed in totally-enclosed cavity volume 2 or the semiclosed cavity volume 3.

When the amplifier circuit of this small-sized active super bass box only includes low frequency lattice network 24 and bass power amplification circuit 25, can cooperate with the little audio amplifier of other various dissimilar active left and right acoustic channels, to remedy the deficiency of bass

Amplifier circuit also can include 6 sound channel amplifying circuits, and corresponding input socket and loud speaker output interface, to adapt to the AC-3 output of DVD; LF power amplifier is promptly arranged, connect the woofer in casing; The left and right acoustic channels amplifying circuit is arranged, about back surround channel amplifying circuit, the center channels amplifying circuit connects to outside left and right acoustic channels audio amplifier by the loud speaker output interface, about back surround channel audio amplifier and center channels audio amplifier.

The utility model compared with prior art has the following advantages: 6.5 inches woofers can bear bigger power, It is small-sized that but the size of small-sized Super Bass Loudspeaker Enclosure still be can yet be regarded as. Form active little audio amplifier and VCD by the utility model, SVCD, DVD matches, and is combined into family movie institute, and the sound dynamic change that the amplitude that can obtain is bigger is more than 20 In the room of square centimeter, effect is fine.

Claims

1. small-sized active super bass box, he is by sound box and the paraphase sound guide tube that places in it, woofer, amplifier circuit, metallic plate, signal input socket and input signal change over switch are formed, it is characterized in that being that sound box includes totally-enclosed cavity volume and semiclosed cavity volume, in totally-enclosed cavity volume, place paraphase sound guide tube and (5～7) inch woofer, the inner width of sound box matches with the caliber size of (5～7) inch woofer, be equipped with amplifier circuit at semiclosed cavity volume, metallic plate, signal input socket and input signal change over switch.

2. small-sized active super bass box according to claim 1, the outlet that it is characterized in that the paraphase sound guide tube open with boxboard that loud speaker is connected on, the arrival end of its paraphase sound guide tube stretches to the boxboard on the boxboard opposite that loud speaker is connected, and presses close to this boxboard.

3. small-sized active super bass box according to claim 1 is characterized in that the signal input socket has more than 2 pairs, selects input socket by the input signal change over switch.

4. small-sized active super bass box according to claim 1 is characterized in that amplifier circuit includes LF power amplifier at least.

5. small-sized active super bass box according to claim 1 is characterized in that being that the material of casing can be plastics, timber, paper material.