CN114071330B

CN114071330B - Vibration structure of sound production device

Info

Publication number: CN114071330B
Application number: CN202010750590.5A
Authority: CN
Inventors: 杨亦春
Original assignee: Institute of Acoustics CAS
Current assignee: Institute of Acoustics CAS
Priority date: 2020-07-30
Filing date: 2020-07-30
Publication date: 2023-03-24
Anticipated expiration: 2040-07-30
Also published as: CN114071330A

Abstract

The invention discloses a vibration structure of a sound generating device, which comprises: interior elastic support piece (2), outer elastic support piece (1), Y shape vibrating diaphragm (3) and voice coil (6), interior elastic support piece (2) and outer elastic support piece (1) are coaxial and hollow cylinder of equal height, set up Y shape vibrating diaphragm (3) between interior elastic support piece (2) and outer elastic support piece (1), and the lower tip of Y shape vibrating diaphragm (3) is hollow cylindric voice coil (6), is arranged in magnetic circuit's magnetic gap. Compared with the common horizontal spring support, the effective sound-producing area of the invention is enlarged by more than 2 times under the condition of the voice coil and the support with the same specification, and the sensitivity of the manufactured loudspeaker is improved by more than 3 dB; and keep the Y-shaped vibrating diaphragm not to take place to be partial to, reduce the probability that the voice coil loudspeaker voice coil takes place to rub the circle.

Description

Vibration structure of sound production device

Technical Field

The invention relates to the technical field of acoustic electric speakers, in particular to a vibration structure of a sound production device.

Background

The sound production method of the existing electric loudspeaker mainly adopts a plane elastic wave to support an arch-shaped vibrating diaphragm for sound production, the elastic wave is supported on a horizontal plane and fixed on a supporting platform, when the deformation of the vibrating diaphragm is not counted, the sound production sensitivity is in direct proportion to the area of the vibrating diaphragm, and the fixed surface occupies the larger part of the area of the vibrating diaphragm on the water surface, so that the bottleneck problem of improving the sensitivity is solved. On the other hand, the reverse vibration of the dome top cancels part of the sound, resulting in a decrease in sensitivity.

As shown in fig. 1 (a) and 1 (b), the vibration structure of a sound generating apparatus in the prior art is a top view and a cross-sectional view of a common double-folded ring y-shaped diaphragm; the voice coil loudspeaker comprises a horizontal outwards-folded ring 7, a horizontal inwards-folded ring 8, a Y-shaped vibrating diaphragm 3, an inner supporting platform 4, an outer supporting platform 5 and a voice coil 6. For example, for a 130mm diameter voice head, a 90mm voice coil, the horizontal outward-folding rings and the horizontal inward-folding rings occupy a horizontal area of 5836 square millimeters, and the effective sound-emitting area is only 4862 square millimeters.

Disclosure of Invention

The invention aims to overcome the problems in the prior art, provides a method for reducing the horizontal area occupied by a supporting spring, enlarging the effective sound-producing area of a vibrating diaphragm and further improving the sound-producing sensitivity, and solves the problem of low sound-producing effect of the conventional vibrating diaphragm.

In order to achieve the above object, the present invention provides a vibration structure of a sound generating apparatus, the structure including: the inner elastic support part and the outer elastic support part are hollow cylinders which are coaxial and equal in height, the Y-shaped vibrating diaphragm is arranged between the inner elastic support part and the outer elastic support part, and the lower end part of the Y-shaped vibrating diaphragm is a hollow cylindrical voice coil and is located in a magnetic gap of the magnetic circuit system.

As an improvement of the structure, the relative elastic deviation amount of the inner elastic supporting part and the outer elastic supporting part is less than 10%, so that the Y-shaped vibrating diaphragm is not deviated, and the probability of coil rubbing of the voice coil is reduced.

As an improvement of the above structure, the upper inner edge of the y-shaped diaphragm is integrally connected with the inner elastic supporting member, and the upper outer edge of the y-shaped diaphragm is integrally connected with the outer elastic supporting member.

As an improvement of the structure, the inner elastic supporting piece and the outer elastic supporting piece are longitudinally multi-corrugated spring tubes.

As an improvement of the above structure, the inner elastic supporting member is fixedly connected with the lateral side of the inner supporting table, and the outer elastic supporting member is fixedly connected with the lateral side of the outer supporting table, so that the Y-shaped diaphragm is positioned on the supporting table and the gap is maintained.

As an improvement of the above structure, the inner elastic supporting member and the outer elastic supporting member are single corrugated spring tubes.

As an improvement of the above structure, the joint between the y-shaped diaphragm and the inner and outer elastic supporting members is raised in an inverted U-shape.

Compared with the prior art, the invention has the advantages that:

1. the invention adopts the longitudinal spring support, compared with the common horizontal spring support, the effective sound production area of the double-tube spring Y-shaped vibrating diaphragm is enlarged by more than 2 times under the condition of the same specification of voice coils and supports, and the sensitivity of the manufactured loudspeaker is improved by more than 3 dB;

2. the double-tube spring can keep the Y-shaped vibrating diaphragm not to deflect, and the probability that the voice coil rubs the coil is reduced.

Drawings

Fig. 1 (a) is a top view of a vibration structure of a sound generating device in the prior art, which adopts a common double-folded loop Y-shaped diaphragm;

FIG. 1 (b) is a cross-sectional view of FIG. 1 (a);

fig. 2 (a) is a top view of a vibration structure of a sound generating apparatus according to embodiment 1 of the present invention, which employs a double-tube spring Y-shaped diaphragm;

FIG. 2 (b) is a cross-sectional view of FIG. 2 (a);

fig. 3 is a sectional view of the vibration structure of the sound-generating apparatus of embodiment 2 using a simplified double-tube spring Y-shaped diaphragm;

fig. 4 is a cross-sectional view of a y-shaped diaphragm whose edge is raised in the vibration structure of the sound generating apparatus according to embodiment 3.

Reference numerals

1. Outer elastic support part 2, inner elastic support part 3, Y-shaped vibrating diaphragm 4 and inner supporting platform

5. External support table 6, voice coil 7, horizontal outward-folded ring 8 and horizontal inward-folded ring

Detailed Description

The invention relates to a vibration structure of a sound generating device, which is technically characterized in that: on one hand, under the condition of the same specification of voice coil and support piece, compared with the common horizontal spring support, the effective sound production area of the invention is enlarged by more than 2 times, so that the sensitivity of the manufactured loudspeaker is improved by more than 3dB, on the other hand, the elastic support piece of the invention can keep the Y-shaped vibrating diaphragm from deviating, and reduce the probability of coil rubbing of the voice coil.

A vibration structure of a sound emitting apparatus, comprising: the outer elastic support part is a tubular spring, the inner elastic support part and the outer elastic support part are tubular springs, the elasticity of the inner elastic support part and the elasticity of the outer elastic support part are nearly equal, and the relative elastic deviation amount is less than 10%.

The outer elastic supporting piece is integrally connected with the outer edge of the Y-shaped vibrating diaphragm, the outer elastic supporting piece is laterally fixed on the outer side of the outer supporting platform through screws, the inner elastic supporting piece is integrally connected with the inner edge of the Y-shaped vibrating diaphragm, the inner elastic supporting piece is laterally fixed on the inner side of the inner supporting platform through screws, and the horizontal area occupied by the outer elastic supporting piece and the inner elastic supporting piece can be ignored.

The technical solution of the present invention is described in detail below with reference to the accompanying drawings and examples.

Example 1

As shown in fig. 2 (a) and 2 (b), embodiment 1 of the present invention provides a vibration structure of a sound emitting device, including: outer elastic support 1, interior elastic support 2, Y-shaped vibrating diaphragm 3, inner bearing platform 4, outer bearing platform 5, voice coil loudspeaker voice coil 6. The outer elastic supporting piece adopts an outer tube spring, and the inner elastic supporting piece adopts an inner tube spring which is a longitudinal multi-corrugated spring tube. The voice coil 6 is located in the magnetic gap of the magnetic circuit system.

Outer elastic support member 1 is connected with the outside integral type of Y-shaped vibrating diaphragm 3, and interior elastic support member 2 is connected with the inboard integral type of Y-shaped vibrating diaphragm 3, and outer elastic support member 1 is fixed with the screw in the lateral direction at the lateral surface of outer bearing platform 5, and outer elastic support member 2 is fixed with the screw in the lateral direction at the medial surface of inner bearing platform 4. So that the y-shaped diaphragm 3 is positioned on the support table with the gap maintained.

The diameter of the outer tube spring 1 is 125mm, the wave height of wave number 2 is 1mm, the diameter of the inner tube spring is 50mm, the wave height of wave number 3 is 0.75mm, the elasticity of the inner tube spring and the elasticity of the outer tube spring are approximately equal, the relative amount of elastic deviation is less than 10%, and deformation of the Y-shaped vibrating diaphragm 3 during vibration is avoided.

The wave height of the tube spring is designed to enable the elasticity of the inner tube spring and the elasticity of the outer tube spring to be approximately equal, so that lateral deviation can be avoided when the Y-shaped vibrating diaphragm vibrates longitudinally, and the possibility of coil rubbing is reduced.

For example, for a 130mm diameter sound head, a 90mm voice coil, the effective sound-emitting area of the ordinary flat spring Y-shaped diaphragm of FIG. 2 is 4862 square millimeters, while the effective sound-emitting area of the dual-tube spring Y-shaped diaphragm is 5836 square millimeters more, the effective sound-emitting area of the embodiment is increased to about 2.2 times than that of the ordinary flat spring Y-shaped diaphragm, and the sound-emitting sensitivity is increased by 3.4dB.

When the wave number 2 wave height 1mm of outer tube spring diameter 125mm, the wave number 3 wave height 0.75mm of inner tube spring diameter 50mm, compare with the ordinary plane spring Y shape vibrating diaphragm of the same specification, the effective vocal area of vibrating diaphragm improves more than 2 times, and the sensitivity of producing sound improves more than 3dB.

Example 2

As shown in fig. 3, embodiment 2 of the present invention provides a vibration structure of a sound emitting device, including: outer elastic support 1, interior elastic support 2, Y-shaped vibrating diaphragm 3, inner bearing platform 4, outer bearing platform 5, voice coil loudspeaker voice coil 6. The outer elastic supporting piece adopts an outer tube spring, and the inner elastic supporting piece adopts an inner tube spring which is a longitudinal single-corrugated spring tube. The voice coil 6 is located in the magnetic gap of the magnetic circuit system. In this embodiment, the multi-bellows tube spring of embodiment 1 is simplified to a double-tube spring having a single bellows in the longitudinal direction, and a certain effect can be obtained. Other connections and parameters were the same as in example 1. Also within the scope of the invention.

Example 3

As shown in fig. 4, embodiment 3 of the present invention provides a vibration structure of a sound generating apparatus, including: outer elastic support 1, interior elastic support 2, Y-shaped vibrating diaphragm 3, inner bearing platform 4, outer bearing platform 5, voice coil loudspeaker voice coil 6. The junction uplift of Y shape vibrating diaphragm and elastic support part is the shape of falling U, and voice coil 6 is located magnetic gap of magnetic circuit. In this embodiment, the tube spring of embodiment 1 is simplified, and a certain effect can be obtained by using the elasticity of the edge bulge of the diaphragm body instead of the bellows spring. Other connections and parameters were the same as in example 1. Also within the scope of the invention.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not limited. Although the present invention has been described in detail with reference to the embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted without departing from the spirit and scope of the invention as defined in the appended claims.

Claims

1. A vibrating structure of a sound-generating apparatus, characterized in that the structure comprises: the magnetic circuit system comprises an inner elastic supporting part (2), an outer elastic supporting part (1), a Y-shaped vibrating diaphragm (3) and a voice coil (6), wherein the inner elastic supporting part (2) and the outer elastic supporting part (1) are coaxial hollow cylinders with equal height, the Y-shaped vibrating diaphragm (3) is arranged between the inner elastic supporting part (2) and the outer elastic supporting part (1), and the lower end part of the Y-shaped vibrating diaphragm (3) is a hollow cylindrical voice coil (6) and is positioned in a magnetic gap of the magnetic circuit system;

the upper inner edge of the Y-shaped vibrating diaphragm (3) is integrally connected with the inner elastic supporting part (2), and the upper outer edge of the Y-shaped vibrating diaphragm (3) is integrally connected with the outer elastic supporting part (1);

the inner elastic supporting piece (2) and the outer elastic supporting piece (1) are longitudinal multi-corrugated spring tubes;

or the inner elastic supporting piece (2) and the outer elastic supporting piece (1) are single-corrugated spring tubes;

or the joint of the Y-shaped vibrating diaphragm (3) and the inner elastic supporting part (2) and the outer elastic supporting part (1) is raised to be in an inverted U shape;

the elasticity deviation relative quantity of interior elastic support piece (2) and outer elastic support piece (1) is less than 10% for the Y-shaped vibrating diaphragm does not take place to deviate from, reduces the probability that the voice coil loudspeaker voice coil takes place to rub the circle.

2. The vibrating structure of a sound-generating apparatus according to claim 1, wherein the inner elastic support (2) is fixedly connected to the inner support (4) in the lateral direction, and the outer elastic support (1) is fixedly connected to the outer support (5) in the lateral direction, so that the Y-shaped diaphragm (3) is located on the support and a gap is maintained.