CN2410836Y

CN2410836Y - Box structure of overweight low voice loudspeaker box

Info

Publication number: CN2410836Y
Application number: CN 00219601
Authority: CN
Inventors: 谈建波; 上官雪峰
Original assignee: XINKE ELECTRONIC GROUP CO JIANGSU PROV
Current assignee: XINKE ELECTRONIC GROUP CO JIANGSU PROV
Priority date: 2000-03-11
Filing date: 2000-03-11
Publication date: 2000-12-13
Anticipated expiration: 2010-03-11

Abstract

The utility model belongs to a member of a super-heavy bass loudspeaker. A spacer plate of the structure member is fixed in a loudspeaker body, and a front cavity body and a back cavity body are formed between the spacer plate and the loudspeaker body. A potentiometer seat and a phase reversal tube are fixed on a front plate of the loudspeaker body, the great mass of the phase reversal tube is arranged in the front cavity body, a speaker is fixed on the spacer plate and is arranged in the back cavity body, and a paper cone of the speaker is arranged by surrounding a speaker hole of the spacer plate. A plate body of the spacer plate is provided with a pressure hole which has the function of balancing. After the structure member is used for the super-heavy bass loudspeaker, the loudspeaker body has small volume and the loudspeaker has small amplitude when the lower limitation with definite frequency is output and the definite sound pressure is achieved.

Description

The box structure of sub-woofer

The utility model relates to a kind of parts of sub-woofer.

The casing of common sub-woofer has only a cavity, loud speaker be fixed in the casing and cone outside, effect is better when making the sound of playback low-frequency range, reach under the certain frequency in limited time, the volume of casing must be bigger, when output will reach certain acoustic pressure, the amplitude of loud speaker is also bigger.

The purpose of this utility model is, provides in a kind of use, and at output certain frequency lower limit, when reaching certain acoustic pressure, the box structure of the sub-woofer that the casing volume is less, the amplitude of loud speaker is also less.

The technical scheme that realizes the utility model purpose is (referring to Fig. 1 to Fig. 5): this box structure has casing (1), potentiometer seat (2), phase-reversing tube (3) and loud speaker (7), potentiometer seat (2) and phase-reversing tube (3) are fixed on the casing (1), its design feature is: this structural member also has dividing plate (4), the plate body (41) of dividing plate (4) is provided with pressure port (42) and speaker hole (43), dividing plate (4) is fixed in the casing (1), the space that is surrounded between the plate face forward of dividing plate (4) and the casing (1) forms preceding cavity (5), dividing plate (4) backwards the plate face and casing (1) between the space that surrounded form rear chamber (6); The header board (11) that phase-reversing tube (3) is fixed on casing (1) goes up and the major part of phase-reversing tube (3) is in the preceding cavity (5), loud speaker (7) be fixed on dividing plate (4) go up and be in the rear chamber (6), the cone of loud speaker (7) is provided with around speaker hole (43).

Above-mentioned phase-reversing tube (3) has 2, and the bottom of header board (11) is gone up and be positioned to the header board (11) that all is fixed on casing (1), and the axis of 2 phase-reversing tubes (3) is parallel to each other and is positioned on the same horizontal plane; The top of phase-reversing tube (3) is gone up and be positioned to the header board (11) that potentiometer seat (2) is fixed on casing (1); Pressure port (42) on the plate body (41) of dividing plate (4) is positioned at the top of plate body (41); Speaker hole (43) is positioned at the position, middle and upper part of plate body (41) and is in the below of pressure port (42).

The volume of rear chamber (6) is 1.5～3 times of preceding cavity (5) volume.

The utlity model has positive effect: this box structure adopts the quadravalence function of vocal cords bandpass filter formula to design, loud speaker, phase-reversing tube, preceding cavity mutual group become a last of the twelve Earthly Branches nurse hertz resonator system, and rear chamber then is balance loud speaker tow sides pressure differential and the cavity set.By the adjustment of the pressure port on the dividing plate, can make loud speaker when work, obtain the preferable stiffness ratio and the lower distortion factor.After this box structure was used for sub-woofer, when output reached same lower-frequency limit, volume was much smaller than common audio amplifier; Efficient is than common audio amplifier height; Under the situation of the certain acoustic pressure of output, loudspeaker unit can be in operating state with less amplitude, thereby can reduce nonlinear distortion significantly.

Drawing of the present utility model is described as follows:

Fig. 1 is a kind of outline drawing of the present utility model.

Fig. 2 is Fig. 1 front view.

Fig. 3 is the A-A cross-sectional schematic of Fig. 2.

Fig. 4 is the B-B cross-sectional schematic of Fig. 2.

Fig. 5 is the C-C cross-sectional schematic of Fig. 2.

The utility model will be further described below in conjunction with drawings and Examples.

Embodiment 1,

See Fig. 1 to Fig. 5, this box structure has casing (1), potentiometer seat (2), phase-reversing tube (3), dividing plate (4) and loud speaker (7).Casing (1) has header board (11), tetrad plate (12), back plate (13) and back board mount (14).After being fixedly connected sequentially, the left plate of casing (1), top board, right plate and low plate then constitute tetrad plate (12).Header board (11) and back board mount (14) are separately fixed on the tetrad plate (12), and back plate (13) is fixed on the back board mount (14), thereby constitute casing (1).The plate body (41) of dividing plate (4) is provided with pressure port (42) and speaker hole (43); Pressure port (42) is positioned at the top of plate body (41), and speaker hole (43) is positioned at the position, middle and upper part of plate body (41) and is in the below of pressure port (42).Dividing plate (4) is fixed in the casing (1), and the space that is surrounded between the plate face forward of dividing plate (4) and the casing (1) forms preceding cavity (5), dividing plate (4) backwards the plate face and casing (1) between the space that surrounded form rear chamber (6); The volume of rear chamber (6) is 2 times of preceding cavity (5) volume approximately.Phase-reversing tube (3) has 2, and the bottom of header board (11) is gone up and be positioned to the header board (11) that all is fixed on casing (1), and the axis of 2 phase-reversing tubes (3) is parallel to each other and is positioned on the same horizontal plane, and the major part of phase-reversing tube (3) is in the preceding cavity (5); The top of phase-reversing tube (3) is gone up and be positioned to the header board (11) that potentiometer seat (2) is fixed on casing (1); Loud speaker (7) be fixed on dividing plate (4) go up and be in the rear chamber (6), the cone of loud speaker (7) is provided with around speaker hole (43).

Claims

1, a kind of box structure of sub-woofer, has casing (1), potentiometer seat (2), phase-reversing tube (3) and loud speaker (7), potentiometer seat (2) and phase-reversing tube (3) are fixed on the casing (1), it is characterized in that: this structural member also has dividing plate (4), the plate body (41) of dividing plate (4) is provided with pressure port (42) and speaker hole (43), dividing plate (4) is fixed in the casing (1), the space that is surrounded between the plate face forward of dividing plate (4) and the casing (1) forms preceding cavity (5), dividing plate (4) backwards the plate face and casing (1) between the space that surrounded form rear chamber (6); The header board (11) that phase-reversing tube (3) is fixed on casing (1) goes up and the major part of phase-reversing tube (3) is in the preceding cavity (5), loud speaker (7) be fixed on dividing plate (4) go up and be in the rear chamber (6), the cone of loud speaker (7) is provided with around speaker hole (43).

2, the box structure of sub-woofer according to claim 1, it is characterized in that: phase-reversing tube (3) has 2, the bottom of header board (11) is gone up and be positioned to the header board (11) that all is fixed on casing (1), and the axis of 2 phase-reversing tubes (3) is parallel to each other and is positioned on the same horizontal plane; The top of phase-reversing tube (3) is gone up and be positioned to the header board (11) that potentiometer seat (2) is fixed on casing (1); Pressure port (42) on the plate body (41) of dividing plate (4) is positioned at the top of plate body (41), and speaker hole (43) is positioned at the position, middle and upper part of plate body (41) and is in the below of pressure port (42).

3, the box structure of sub-woofer according to claim 2 is characterized in that: the volume of rear chamber (6) is 1.5～3 times of preceding cavity (5) volume.