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Driving system of loudspeaker

A driving system and loudspeaker technology, applied in the direction of sensors, electrical components, etc., to achieve the effect of improving high-frequency playback, reducing asymmetry, and reducing nonlinearity

Inactive Publication Date: 2008-05-07
张百良
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to propose a drive system for a loudspeaker that adopts a magnetic circuit without a magnetic gap or a magnetic circuit with a large magnetic gap, which can greatly reduce the risk of "scratching rings", so as to avoid the use of a fixed core strut and solve the problem of existing loudspeakers due to Problems caused by fixed core support

Method used

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  • Driving system of loudspeaker
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  • Driving system of loudspeaker

Examples

Experimental program
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Effect test

Embodiment 1

[0027] The present embodiment is a cone loudspeaker, and the structure of its drive system is as follows: Figure 6 shown.

[0028] The loudspeaker is equipped with a 35mm diameter voice coil 6 on a 170mm diameter cone 7. The upper magnet 2, the magnetic pole plate 1, the lower magnet 3 and the iron plate 4 form a magnetic circuit without a magnetic gap. The upper and lower magnets The magnetic poles with the same name are respectively combined with the upper and lower sides of the magnetic pole plate. The bottom is an iron flat plate 4, and the voice coil 6 is set on the side surface of the magnetic pole plate 1. The diameter of the magnetic pole plate 1 is 33.5mm, and the distance between the magnetic pole plate 1 and the inner wall of the voice coil 6 0.75mm, the last magnetic steel 2 is φ (diameter) 30 × 3mm, the lower magnetic steel 3 is φ30 × 15mm, and the iron flat plate 4 below is φ80 × 5mm.

[0029] The magnetic circuit composition principle of the speaker drive syst...

Embodiment 2

[0031] This embodiment is a multi-drive system of a flat panel speaker, such as Figure 7 shown. This system has a square vibrating plate 8, and this vibrating plate is 100 * 100 * 10mm foam plate, is equipped with 4 φ 25mm voice coils 6 at the nodal line position of described vibrating plate, namely the four side center positions of square plate, Each voice coil is equipped with a non-magnetic gap magnetic circuit composed of upper magnetic steel 2, magnetic pole plate 1, lower magnetic steel 3 and iron plate 4. Among them, the magnetic pole plate 1 is φ24mm×4mm, and the inner wall of the voice coil and The average distance between the magnetic pole plates 1 is 0.5mm, and the total thickness of the vibrating plate 8 plus the magnetic circuit is only 25mm, which is much smaller than the traditional design, under the condition that the vertical amplitude is guaranteed to be 8mm. The ferrous plates 4 in the four magnetic circuits are merged into one.

Embodiment 3

[0033] This embodiment is a single voice coil drive system for a flat panel speaker, as shown in FIG. 10 . The system has a square vibrating plate 8, which adopts a φ50mm thick 10mm foam board, and a φ35mm voice coil 6 with a wall thickness of 0.3mm is installed on its pitch circle. The magnetic circuit with a large magnetic gap is located below it, and the magnetic steel 2 is placed on the magnetic circuit. , magnetic pole plate 1, lower magnetic steel 3 and U-shaped iron bowl 5 constitute, the magnetic pole plate 1 diameter is φ 33.5mm, and the inner circle of U-shaped iron bowl 5 is φ 37.5mm. The distance between the inner wall of the voice coil 6 and the magnetic pole plate 1 is 0.75 mm, and the average distance between the outer wall of the voice coil 6 and the inner wall of the U-shaped iron bowl 5 is 1 mm. Such a large distance can effectively avoid "ring rubbing", so there is no need to Fixed core mechanism.

[0034] The magnetic circuit composition principle of the spe...

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Abstract

The present invention provides the driving system of a speaker, which comprises a vibration film or a vibration plate, a voice coil and a magnetic circuit. The present invention is characterized in that the magnetic circuit consists of a piece of magnetic plate and two pieces of steel magnets; the same magnetic poles of the two steel magnets are respectively coupled with the upper face and the lower face of the magnetic plate; so a radial magnetic field is gathered near the side face of the magnetic plate. The voice coil is covered and arranged around the periphery of the side face of the magnetic plate. With the technical proposal of the present invention, a non-magnet clearance magnetic circuit is formed; or the driving system of the speaker of a large-magnet clearance magnetic circuit is formed; the moving space of the voice coil is enlarged; core-fixing branch parcels or other similar core-fixing mechanisms are saved; the relatively beneficial technical effects are produced: the high frequency replaying is improved; the nonlinear is reduced; and the problem that a multi-driving speaker is difficult to arrange is solved.

Description

technical field [0001] The invention relates to a driving system of a loudspeaker without a fixed-core support piece or other additional center-fixing mechanisms. Background technique [0002] The composition of the traditional dynamic loudspeaker is as follows figure 1 As shown, the vibrating membrane installed on the bracket - the cone (also known as the drum paper, including the elastic suspension edge of its outer edge), is connected with the voice coil under the cone, and the lower part of the voice coil is wound by wire. Coil, the coil is located in the magnetic gap formed by the magnetic circuit system. When the speaker is working, the audio current fed by the external power amplifier flows through the voice coil, and the current interacts with the radial magnetic field in the magnetic gap to generate an electromagnetic vibration of up and down The acting driving force drives the cone to vibrate up and down to make sound. [0003] In order to obtain a stronger magne...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04R9/02H04R9/06
Inventor 张百良
Owner 张百良
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