CN2519575Y

CN2519575Y - Loudspeaker with paper box axial vibration displacement detecting device

Info

Publication number: CN2519575Y
Application number: CN 02218496
Authority: CN
Inventors: 宋建平; 吴有珍
Original assignee: Individual
Current assignee: Individual
Priority date: 2002-01-23
Filing date: 2002-01-23
Publication date: 2002-10-30
Anticipated expiration: 2012-01-23

Abstract

A loudspeaker with a detection device of paper basin axial vibration displacement is characterized in that a Hall sensor 3 and a driving component 9 are arranged; the Hall sensor is connected with a paper basin 2 through the driving component 9, which can detect the axial vibration displacement of the paper basin and inhibit the interference vibration of other directions; and the output signals of the Hall displacement sensor is in linear relations or other preset functional relations with the paper basin axial vibration displacement. The utility model is used in the closed loop servo technology that is used in loudspeaker paper basin vibration and amplifier input, can enhance the effects of the closed loop servo technology, effectively reduces a plurality of infidelity of acoustic systems and enhances the performance of acoustic systems.

Description

A kind of loud speaker with cone axial vibration displacement detector

Technical field

The utility model relates to the loud speaker in the sound system, specifically a kind of loud speaker with cone axial vibration displacement detector, the performance that is used to reduce the various distortions of sound system and improves sound system.

Background technology

Under perfect condition, the axial vibration displacement of cone is directly proportional with the input signal of amplifier, but, because cone edge and voice coil loudspeaker voice coil centering corrugated plate are presented as nonlinear return spring, because the existence of voice coil loudspeaker voice coil inductance, make loudspeaker impedance show as the function of frequency input signal, the voice coil loudspeaker voice coil electric current is the variation of reflected input signal correctly, because the resonance of loudspeaker movements system, the resonance of audio amplifier, reasons such as closed box cushioning effect, the displacement of cone vibration can not loyal reflected input signal variation and produce bigger nonlinearity erron, described error makes the harmonic distortion index of sound system, transient distortion index and frequency response index worsen.

Between diffuser vibration and amplifier input, adopt the closed loop servo technology can reduce the various distortions of sound system effectively, it is key in the described closed loop servo technology that the vibration of cone is detected, though existing multiple cone vibration detection device has certain effect, but also come with some shortcomings, for example can not the independent detection cone axial displacement in the vibration, the cost increase is more etc., has directly influenced the effect of described closed loop servo technology.

Summary of the invention

The purpose of this utility model is the problem that exists at above-mentioned prior art, a kind of loud speaker with cone axial vibration displacement detector is provided, can detect the axial vibration displacement of cone, suppress the interference vibration of other direction, linear or other the predefined functional relation of hall displacement transducer output signal and cone axial vibration displacement, the utility model can improve the effect of described closed loop servo technology, reduces the various distortions of sound system effectively and improves the performance of sound system.

The purpose of this utility model can reach by following measure:

A kind of loud speaker with cone axial vibration displacement detector, comprise loudspeaker body 1, cone 2, it is characterized in that being provided with Hall element 3, transmission component 9, Hall element 3 is connected with cone 2 by transmission component 9, transmission component 9 is fixed on the relevant position of loudspeaker body 1, transmission component 9 is by transmission levers 4, connector 5, torsion shaft 6, support 7 is formed, and transmission levers 4 one ends link to each other with connector 5, and transmission levers 4 is fixed on the torsion shaft 6, torsion shaft 6 is fixed on the support 7, when lever 4 when torsion shaft 6 is made low-angle and is rotated, lever 4, torsion shaft 6, do not have slide relative between the support 7, magnet 8 also is housed on the transmission component 9.

The purpose of this utility model can also reach by following measure:

Described hall displacement transducer 3 directly is connected with cone 2.

Described magnet 8 can be electromagnet.

Described hall displacement transducer 3 and magnet 8 can be capacitance displacement sensors.

The utility model has following advantage compared to existing technology:

1, the hall displacement transducer output signal is big, and circuit is simple, and is effective.

2, linear or other the predefined functional relation of output signal and cone axial vibration displacement.

3, output signal is only relevant with the axial vibration displacement of cone, disturbs vibration to be suppressed.

4, cost is low, good integrity, and debugging is convenient, properties of product high conformity during batch process.

Description of drawings

Fig. 1 is the utility model embodiment vertical view.

Fig. 2 is the A-A face cutaway view of Fig. 1.

Fig. 3 is the utility model embodiment stereogram.

Fig. 4 is the B partial enlarged drawing of Fig. 3.

Fig. 5 is the another embodiment stereogram of the utility model.

Fig. 6 is the C partial enlarged drawing of Fig. 5.

Embodiment

Below in conjunction with drawings and Examples the utility model is further described:

Referring to Fig. 1, Fig. 2, Fig. 3, Fig. 4, hall displacement transducer 3 is by the transmission levers 4 in the transmission component 9, connector 5 links to each other with cone 2, transmission component 9 is fixed on the loudspeaker body 1, it is without hindrance when the installation site should make the motion of transmission component 9 motion parts, because torsion shaft 6 can only be transmitted around axle and move, therefore have only along the axial axial vibration displacement of voice coil loudspeaker voice coil in the vibration of cone 2 and be passed on the Hall element 3, the interference vibration of other direction is suppressed, transmission levers 4 and connector 5 are used good rigidly, lightweight material such as paper tube, aluminium alloys etc. are made, torsion shaft 6 can be with very thin, the material that fatigue resistance is high is made as the gold-plated tungsten wire of 0.1 millimeter, resilient material of support 7 usefulness such as phosphorus bronze sheet are made, transmission levers 4 is welded on the torsion shaft 6, and torsion shaft 6 is tightened and is welded on the support 7, makes transmission levers 4 both can rotate a low-angle around torsion shaft 6, make transmission levers 4 again, torsion shaft 6, do not have slide relative between the support 7, avoid producing noise jamming.

Fig. 5, Fig. 6 are another embodiment stereogram of the utility model and C partial enlarged drawing.

Hall displacement transducer 3 also can directly be fixed on the cone 2, and this simplified design can be omitted transmission component 9, is fit to be applied to the less or less demanding occasion of axial vibration displacement.

Hall displacement transducer 3 can use SS49/SS19 series, the SS490 series of finished product Hall integrated circuit such as Honeywell company, also can replace with capacitance displacement sensor or other transducer, and the use of transducer can be with reference to corresponding service manual.

Magnet 8 can adopt common magnet, for preventing magnet demagnetization or aging, also can adopt electromagnet, magnet 8 is installed near the hall displacement transducer 3, make scope that hall displacement transducer 3 moves with cone 2 within the effective magnetic field scope of magnet 8, for obtaining linear output, described effective magnetic field scope should be designed to linear change, also can adjust according to predefined functional relation design or according to test, for example, the variation pattern that can specially design described effective magnetic field also can form specific output signal to obtain the tonequality of mannerism to prevent that amplifier is saturated, and the design in magnetic field can be with reference to Hall element service manual and other monograph.

Described embodiment is work like this: cone is vibrated by the electromagnetic force effect, the axial vibration displacement of described vibration drives hall displacement transducer 3 by connector 5, transmission levers 4 corresponding vibration displacement takes place, because hall displacement transducer 3 is in the magnetic field of the variation that magnet 8 produces, thereby by hall displacement transducer 3 cone axial vibration displacement is transformed into output signal.

Claims

1, a kind of loud speaker with cone axial vibration displacement detector, comprise loudspeaker body (1), cone (2), it is characterized in that being provided with Hall element (3), transmission component (9), Hall element (3) is connected with cone (2) by transmission component (9), transmission component (9) is fixed on the relevant position of loudspeaker body (1), transmission component (9) is by transmission levers (4), connector (5), torsion shaft (6), support (7) is formed, transmission levers (4) one ends link to each other with connector (5), transmission levers (4) is fixed on the torsion shaft (6), torsion shaft (6) is fixed on the support (7), when lever (4) when torsion shaft (6) is made low-angle and is rotated, lever (4), torsion shaft (6), support does not have slide relative between (7), and magnet (8) also is housed on the transmission component (9).

2, according to the loud speaker of the described band cone of claim (1) axial vibration displacement detector, it is characterized in that described hall displacement transducer (3) can directly be connected with cone (2).

3, according to the loud speaker of the described band cone of claim (1) axial vibration displacement detector, it is characterized in that described magnet (8) can be electromagnet.

4, according to the loud speaker of the described band cone of claim (1) axial vibration displacement detector, it is characterized in that described hall displacement transducer (3) and magnet (8) they can be capacitance displacement sensors.