CN210298061U

CN210298061U - Moving coil loudspeaker capable of improving distortion

Info

Publication number: CN210298061U
Application number: CN201921223889.4U
Authority: CN
Inventors: 闫峻; 韩天凌
Original assignee: Ningbo Tonwel Audio Co ltd
Current assignee: Ningbo Tonwel Audio Co ltd
Priority date: 2019-07-31
Filing date: 2019-07-31
Publication date: 2020-04-10
Anticipated expiration: 2029-07-31

Abstract

The utility model relates to a can improve moving coil speaker of distortion, including T iron, magnet steel, splint, the magnet steel is installed on T iron through splint, is equipped with the clearance that supplies the voice coil loudspeaker voice coil activity from top to bottom between splint and T iron, is equipped with the magnetic conduction chamber between magnet steel and T iron, installs a closed part of high conductivity, low magnetic permeability in the magnetic conduction chamber, and closed part is located magnet steel inner wall side, and fixes on the base of T iron; the utility model has the advantages that: the short circuit ring with high conductivity and low magnetic permeability is arranged in the magnetic conduction cavity, and the eddy current is compensated by the short circuit ring, so that an inductance-displacement curve is symmetrical, and the inductance of the voice coil moving towards the magnetic circuit is reduced to reduce even harmonic distortion.

Description

Moving coil loudspeaker capable of improving distortion

Technical Field

The utility model belongs to the technical field of the speaker, especially, relate to a can improve moving coil speaker of distortion.

Background

The magnetic circuit (external magnetic type) of the current common moving coil loudspeaker is of a T iron, magnetic steel and clamping plate structure, when a voice coil moves towards the inner side of the magnetic circuit, due to the pole core effect of the T iron, the inductive reactance of the voice coil is increased but not reduced, an eddy current effect can be generated, the inductance-displacement curve of the voice coil is asymmetric, and even harmonic distortion can be generated due to the asymmetry.

Disclosure of Invention

An object of the utility model is to overcome the not enough of prior art existence, and provide a can improve the moving coil speaker of distortion, compensate the vortex, reduce the inductance value of voice coil loudspeaker voice coil when moving in to the magnetic circuit in order to reduce the distortion.

The utility model aims at accomplishing through following technical scheme, this kind of movable coil speaker that can improve distortion includes T iron, magnet steel, splint, the magnet steel passes through splint to be installed on the T iron, splint with be equipped with the clearance that supplies the voice coil loudspeaker voice coil activity from top to bottom between the T iron, the magnet steel with be equipped with between the T iron and lead the magnetism chamber, the closed part of a high conductivity, low magnetic permeability is installed to the magnetism intracavity, closed part is located the magnet steel inner wall side, and fix on the base of T iron.

Preferably, a groove for installing the closing part is arranged on the base of the T iron, and the groove width of the groove is wider than 1-2 MM of the width of the closing part.

Preferably, the bottom of the closing part is embedded in the groove and fixed by glue.

Preferably, the closing member has a ring shape, and the groove corresponding thereto has a ring shape.

Preferably, the height of the closing component is smaller than or equal to the height of the magnetic steel.

Preferably, the distance between the top of the closing part and the clamping plate is 2 to 3 MM.

Preferably, the closing member is a short circuit ring in the shape of a ring.

The utility model has the advantages that: the short circuit ring with high conductivity and low magnetic permeability is arranged in the magnetic conduction cavity, and the eddy current is compensated by the short circuit ring, so that an inductance-displacement curve is symmetrical, and the inductance of the voice coil moving towards the magnetic circuit is reduced to reduce even harmonic distortion.

Drawings

Fig. 1 is a schematic view of the front view cross-sectional structure of the present invention.

Fig. 2 is a schematic diagram of the displacement-inductance curve with the short-circuiting ring of the voice coil moving from outside to inside according to the present invention.

Fig. 3 is a schematic diagram of the displacement-inductance curve without the short-circuit loop of the voice coil moving from outside to inside according to the present invention.

The reference numbers in the drawings are respectively: 1. t iron; 2. magnetic steel; 3. a splint; 4. a voice coil; 5. a magnetic conducting cavity; 6. A closing member; 11. a groove; 12. and (4) heat dissipation holes.

Detailed Description

The present invention will be described in detail with reference to the accompanying drawings: as shown in the attached drawing 1, the utility model discloses a T iron 1, magnet steel 2, splint 3, magnet steel 2 installs on T iron 1 through splint 3, be equipped with the clearance that supplies voice coil loudspeaker voice coil 4 activity from top to bottom between splint 3 and T iron 1, be equipped with between magnet steel 2 and the T iron 1 and lead magnetic cavity 5, install a high conductivity in the magnetic cavity 5, the closed part 6 of low magnetic permeability, closed part 6 is located magnet steel 2 inner wall side, and fix on T iron 1's base, and can not interfere the motion of interfering voice coil loudspeaker voice coil 4.

In order to facilitate the installation of the closing component 6, a groove 11 for installing the closing component is arranged on the base of the T iron 1, the bottom of the closing component 6 is embedded in the groove 11 and is fixed by glue, the width of the groove 11 is wider than 1-2 MM of the width of the closing component 6, the width of the closing component 6 is in the range of 1.5-2.5 MM, and therefore the width of the groove 11 is in the range of 2.5-4.5 MM; therefore, the closed part 6 is convenient to glue and install, and meanwhile, glue is prevented from flowing to the heat dissipation holes 12 formed in the base of the T iron 1.

In order to form-fit the closing part 6 to the integrated moving coil loudspeaker, the closing part 6 has a ring shape and the corresponding recess 11 has a ring shape.

The height of the closing component 6 is less than or equal to that of the magnetic steel 2, and the bottom of the magnetic steel 2 is embedded into the groove of the T iron 1, and the distance between the top of the closing component 6 and the clamping plate 3 is 2-3 MM, so that the height of the closing component 6 is most suitable and the achieved performance is also optimal.

The closing member 6 is a ring-shaped short circuit ring, and the material used is copper or aluminum or other material having the same effect.

When the voice coil 4 moves outwards (coil out), the inductance of the voice coil 4 is continuously reduced due to the distance from the pole core (acting as an iron core) of the T iron 1; when the voice coil 4 moves inwards (coil in), which is equivalent to inserting an iron core (equivalent to converting from hollow inductance to iron core inductance), if there is no short-circuit ring, the electric conductor (T iron pole core) around the voice coil 4 will generate induced electromotive force and induced current (eddy current effect), so that the magnetic conductance thereof is increased, and the inductance of the voice coil 4 will increase (as shown in fig. 3); however, when the short-circuit ring (functioning as a secondary Coil) is added, the eddy current effect of the T-iron pole core is reduced due to the high conductivity and the low relative permeability of the short-circuit ring, which causes the internal environment (permeability) of the magnetic circuit to approach or reach the environment when Coil out is reached, so that the inductance of the voice Coil 4 is reduced instead (as shown in fig. 2), thereby making the inductance-displacement curve symmetrical and reducing the distortion.

The present invention is not limited to the above embodiments, and any change is made on the shape or material composition, and all the structural designs provided by the present invention are all the deformation of the present invention, which should be considered within the protection scope of the present invention.

Claims

1. The utility model provides a can improve moving coil speaker of distortion, includes T iron (1), magnet steel (2), splint (3), magnet steel (2) are installed through splint (3) on T iron (1), its characterized in that: splint (3) with be equipped with the clearance that supplies voice coil loudspeaker voice coil (4) to move about from top to bottom between T iron (1), magnet steel (2) with be equipped with between T iron (1) and lead magnetism chamber (5), it installs a closed part (6) of high conductivity, low magnetic permeability in magnetism chamber (5) to lead, closed part (6) are located magnet steel (2) inner wall side, and fix on the base of T iron (1).

2. A distortion-improving moving coil speaker as set forth in claim 1, wherein: a groove (11) for installing a closing part is formed in the base of the T iron (1), and the width of the groove (11) is wider than 1-2 MM of the width of the closing part (6).

3. A distortion-improving moving coil speaker as set forth in claim 2, wherein: the bottom of the closing part (6) is embedded in the groove (11) and fixed by glue.

4. A distortion-improving moving coil speaker as set forth in claim 2, wherein: the closing part (6) is ring-shaped, and the corresponding groove (11) is ring-shaped.

5. A distortion-improving moving coil speaker as set forth in claim 1, wherein: the height of the closing component (6) is less than or equal to that of the magnetic steel (2).

6. A distortion-improving moving coil speaker as claimed in claim 5, wherein: the distance between the top of the closing part (6) and the clamping plate (3) is 2-3 MM.

7. A distortion-improving moving coil speaker as set forth in claim 1, wherein: the closing part (6) is a short-circuit ring in the shape of a ring.