CN107682790B - Loudspeaker - Google Patents

Loudspeaker Download PDF

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Publication number
CN107682790B
CN107682790B CN201711050806.1A CN201711050806A CN107682790B CN 107682790 B CN107682790 B CN 107682790B CN 201711050806 A CN201711050806 A CN 201711050806A CN 107682790 B CN107682790 B CN 107682790B
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CN
China
Prior art keywords
elastic
loudspeaker
anchoring
vibration
conductive layer
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CN201711050806.1A
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Chinese (zh)
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CN107682790A (en
Inventor
侯杰
李奎宝
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Shandong Gettop Acoustic Co Ltd
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Shandong Gettop Acoustic Co Ltd
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Priority to CN2017102087802 priority Critical
Priority to CN201710208780.2A priority patent/CN106937224A/en
Application filed by Shandong Gettop Acoustic Co Ltd filed Critical Shandong Gettop Acoustic Co Ltd
Publication of CN107682790A publication Critical patent/CN107682790A/en
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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04RLOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R9/00Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/06Loudspeakers
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04RLOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R9/00Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/02Details
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04RLOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R9/00Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/02Details
    • H04R9/025Magnetic circuit
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04RLOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2400/00Loudspeakers
    • H04R2400/11Aspects regarding the frame of loudspeaker transducers

Abstract

The invention discloses a loudspeaker, which comprises a vibration system, wherein the vibration system comprises an elastic plate. The loudspeaker of the invention has the advantages that the linear range is enlarged, and the linear range can be enlarged by the design of two sections of arcs of the anchoring elastomer; the flexible material has high structural strength, and the flexible material does not deform after long-time work. Distortion is reduced by more than 30%; the vibration system is uniformly stressed, no swing vibration is generated, and the swing vibration probability is reduced from 90% to below 10%; the flexible structure replaces a lead, the mechanical strength is superior to that of a voice coil wire, fatigue wire breakage caused by high-frequency pulling cannot be caused after the loudspeaker works for a long time, and the flexible structure is superior to a voice coil wire suspension scheme and an immersion metal layer scheme in a mainstream scheme; the symmetrical design of the magnetic circuit system ensures that all positions of the voice coil are uniformly stressed, and the generation of swing vibration is inhibited; the flexible structure can be matched with various mainstream membrane materials to form a loudspeaker, is not influenced by the membrane materials and the thickness, and has wide application range; the mechanical strength of the conductive layer is greater than that of the deposited or electrolyzed conductive layer.

Description

Loudspeaker
Technical Field
The invention relates to a loudspeaker, and belongs to the technical field of electronic equipment.
Background
With the rapid development of electronic industries such as wireless communication, the smart phone, as a main terminal of wireless communication, has remarkable progress in the aspects of function, appearance, reliability and the like. Meanwhile, the rapid development of smart phones also drives the continuous updating progress of the mobile phone electroacoustic industry, and people put forward new requirements on electroacoustic devices applied to mobile phones: small size, high power, high loudness, large amplitude, low distortion.
The prior art scheme is as follows: the conduction of the traditional loudspeaker voice coil depends on two wires led out from the voice coil body. In the design of conventional speaker, these two wire middle parts are unsettled in the speaker, or fix on the vibrating diaphragm surface through the flexible glue, and the lead wire endpoint need with the pad fixed connection in the basin frame, so the unsettled position of lead wire can produce relative vibration with vibration system during speaker work, easily produces the broken string because of the fatigue resistance of voice coil line is not enough after long-time work, leads to the speaker inefficacy. In addition, the lead-out shape of the lead and the glue for fixing the lead can influence the stress balance of the vibration system, so that the vibration system of the product is unevenly stressed at different positions to generate swing vibration, and further the vibration system of the loudspeaker collides with a magnetic circuit system under the high-power condition to influence the output power of the loudspeaker.
Patent No. 201510204166.X proposes a scheme of adopting a laser etching technology to corrode the surface of the diaphragm and deposit a conductive layer to replace a suspended voice coil line, two symmetrical wire grooves are etched on the surface of the silica gel diaphragm through the laser etching technology, a conductive metal layer is deposited in each wire groove through a metal deposition technology, so that the welding parts at two ends of each conductive metal layer can be respectively welded with a voice coil and a pad, and the connection between the voice coil and the pad is realized. However, due to the limitation of the thickness of the diaphragm, the strength of the conductive deposition layer is insufficient, and the fatigue cracking of the deposition layer cannot be avoided; and under the same thickness, the tensile strength of the deposited conductive layer is weaker than that of the rolled conductive material, and fatigue fracture is easily caused after long-time vibration. In addition, the scheme can only deal with corrodible membrane materials such as silica gel materials, and the application range is small.
Patent No. 201320868264.X adopts FPC (flexible printed circuit board) bullet board to replace the scheme of voice coil line, and it is through setting up the soldering lug on FPC bullet board, utilizes the elasticity arm of force of FPC bullet board to realize that the voice coil loudspeaker voice coil switches on with external signal of telecommunication to soldering lug and voice coil loudspeaker voice coil lead wire synchronous oscillation, greatly reduced the risk that the voice coil loudspeaker voice coil lead wire splits or drops from the soldering lug. However, the existing scheme does not realize a larger linear range through bending in the three-dimensional direction of the FPC, namely the height direction of the product, and the FPC elastic arm is easy to generate permanent deformation after long-time work, so that the performance of the loudspeaker is abnormal; and the four elastic arms are not axially symmetrically arranged, so that the stress of each part of the vibration system is uniform, and the problem of swinging vibration cannot be solved.
Fig. 1 is a simulation diagram of the force applied to an FPC elastic board in a similar scheme of patent No. 201320868264.X, and dark areas in four elastic arms represent concentrated points of force. As can be seen from fig. 1, the stress concentration positions of the four elastic arms are not axially symmetric, so that the problem of non-uniform stress of the loudspeaker vibration system cannot be fundamentally solved.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a loudspeaker, which increases the linear range, has higher structural strength, does not deform after the flexible material works for a long time, and is designed with low distortion; the loudspeaker vibration system is uniformly stressed, no swing vibration is generated, and the high-power performance of the loudspeaker is facilitated; the mechanical strength is high, the supporting strength of a vibration system can be increased, the generation of swing vibration is inhibited, and fatigue wire breakage caused by high-frequency pulling cannot be caused after the loudspeaker works for a long time; the application range is wide, and the film is not influenced by the material and the thickness of the film.
In order to solve the technical problems, the invention adopts the following technical scheme: a loudspeaker comprising a vibration system, the vibration system comprising a sprung plate.
According to an optimized scheme, four axially symmetrical anchoring elastic bodies are designed on the elastic plate.
Further, the spring plate further comprises a spring plate body, a terminal, a first pad terminal and a second pad terminal;
the elastic plate body is connected to anchoring elastomer one end, and anchoring elastomer other end connecting terminal, be provided with first pad terminal, second pad terminal on the elastic plate body.
Further, the width of the two ends of the anchoring elastic body is greater than or equal to or less than the middle width.
Further, the anchoring elastic body is bent in a planar direction.
Furthermore, the anchoring elastic body is designed to be a section of arc in the three-dimensional direction, and the anchoring elastic body is symmetrical left and right.
Furthermore, the anchoring elastic body is designed to be a section of arc in the three-dimensional direction, the anchoring elastic body is asymmetric left and right, and the arc top deflects rightwards.
Furthermore, the anchoring elastic body is designed to be a section of arc in the three-dimensional direction, the anchoring elastic body is asymmetric left and right, and the arc top deflects leftwards.
Furthermore, the anchoring elastic body is designed as a section of arc in the three-dimensional direction, and the two ends of the section of arc are designed in different heights.
Further, the anchoring elastic body is designed to be a multi-section arc in the three-dimensional direction.
Further, the anchoring elastic body comprises two arcs or three arcs in the three-dimensional direction.
Further, the anchoring elastic body adopts a combination of planar and three-dimensional shapes.
Wherein, the plane direction refers to the direction of the anchoring elastic body on the plane parallel to the paper surface; the solid direction refers to the direction of the anchoring elastic body in the plane perpendicular to the paper.
Furthermore, the elastic plate is made of a flexible material.
Further, the springboard also comprises a conductive layer.
Furthermore, the conducting layer is made of rolled copper.
Furthermore, the loudspeaker also comprises an annular pole piece, wherein the annular pole piece is designed by hollowing the four inner corners and is used for avoiding and anchoring the elastic body.
Furthermore, the vibration system also comprises a voice coil, a dome and an elastic diaphragm, wherein the voice coil, the elastic plate body, the dome and the elastic diaphragm are bonded together;
the elastic membrane is provided with an accommodating space;
the elastic plate comprises four axially symmetrical anchoring elastic bodies, one ends of the four axially symmetrical anchoring elastic bodies are respectively connected with the elastic plate body, and the elastic plate body is provided with a first pad terminal and a second pad terminal;
the other ends of the four axially symmetrical anchoring elastic bodies are respectively connected with a terminal, and a conductive layer is further arranged on the elastic plate and used for electrically connecting the terminal with the first pad terminal or the second pad terminal;
the voice coil comprises a first lead terminal and a second lead terminal;
the first lead terminal and the second lead terminal are respectively welded on the first pad terminal and the second pad terminal;
the elastic plate is made of a flexible material;
the loudspeaker also comprises a magnetic circuit system;
the magnetic circuit system comprises an annular pole piece, a central pole piece, magnetic steel and a magnetic cover; the annular pole pieces are axially symmetrically arranged, and the axially symmetrical annular pole pieces are injected on the basin frame;
the basin frame is provided with four wiring terminals, the four wiring terminals of the basin frame are respectively connected with the four terminals of the elastic plate in a welding manner, two wiring terminals are connected with external electric signals, and the two terminals respectively welded with the two wiring terminals are electrically connected with the first pad terminal and the second pad terminal through the conductive layer;
the magnetic circuit system is matched and bonded with the basin frame, and the vibration system is matched and bonded with the basin frame to form a complete loudspeaker.
The three-dimensional shape of the anchoring elastic body can adapt to the structural matching of the loudspeaker and adjust the performance of the loudspeaker by optimizing the shape of any arc; the number of radians of the anchoring elastic body can be increased to adapt to the structural matching of the loudspeaker and adjust the performance of the loudspeaker; the anchoring elastic body can be adapted to different height designs by adjusting the plane heights of the two sides of the anchoring elastic body. The anchoring elastic body can comprise a section of arc or a plurality of sections of arc bent in the three-dimensional direction; any one of the multiple arcs can meet the mechanical matching and performance requirements of the loudspeaker by changing the shape of the radian. Preferably, the anchoring elastic body adopts a combination of a plane shape and a three-dimensional shape, the mechanical stress state of the anchoring elastic body is further improved, the linear range of the anchoring elastic body is enlarged, and the large-amplitude and low-distortion performance of the loudspeaker is facilitated.
After the technical scheme is adopted, compared with the prior art, the invention has the following advantages:
1. the linear range of the flexible material can be enlarged by bending the flexible material, and the linear range of the current two-section arc design can be enlarged by more than 20%; and has higher structural strength, and the flexible material does not deform after working for a long time. The characteristics are beneficial to the low-distortion design of the product, and the distortion of the current test scheme is reduced by more than 30%;
2. the axial symmetrical arrangement of the anchoring elastic bodies can ensure that the loudspeaker vibration system is stressed uniformly without generating swinging vibration, thereby being beneficial to the high-power performance of the loudspeaker; the swing vibration probability of the product in the current test scheme is reduced from 90% to below 10%; fig. 16 shows the result of the amplitude test of the conventional scheme, which shows that the conventional loudspeaker generates the swaying vibration due to the uneven stress of the vibration system at the middle and low frequencies; FIG. 17 shows the result of the amplitude test of the test product according to the embodiment of the present invention, which indicates that the test sample of the present invention vibrates uniformly due to the uniform stress of the vibration system, and the vibration state is significantly better than that of the conventional embodiment;
the loudspeaker amplitude varies with the frequency of the input signal; for the five measurement points shown in fig. 15, due to the existence of the rolling vibration, the amplitudes of the five measurement points at the same frequency, especially in the low frequency band where the rolling vibration is severe, may have a large difference, that is, as shown in fig. 16; if the loudspeaker vibration system is uniformly stressed and no vibration is generated, the amplitudes of the five measurement points with the same frequency are basically the same, namely, as shown in fig. 17;
3. the flexible structure replaces a lead, the mechanical strength of the flexible structure is superior to that of a voice coil wire, fatigue wire breakage caused by high-frequency pulling can not be generated after the loudspeaker works for a long time, and the flexible structure is superior to a voice coil wire suspension scheme and an immersion metal layer scheme in a mainstream scheme;
4. the symmetrical design of the magnetic circuit system can ensure that all positions of the voice coil are uniformly stressed and can inhibit the generation of swinging vibration;
5. the flexible structure can be matched with various mainstream membrane materials to form a loudspeaker, is not influenced by the membrane materials and the thickness, and has wide application range;
6. the mechanical strength of the conductive layer is greater than that of the deposited or electrolyzed conductive layer.
The present invention will be described in detail below with reference to the accompanying drawings and examples.
Drawings
Fig. 1 is a simulation diagram of the force of an FPC elastic plate with a similar scheme of patent No. 201320868264. X;
FIG. 2 is a simulation diagram of the spring plate force of the present invention;
FIG. 3 is an exploded view of the speaker of the present invention;
FIG. 4 is a schematic structural view of the springboard of the present invention;
FIG. 5 is a schematic structural view of an anchoring elastomer according to example 2 of the present invention;
FIG. 6 is a schematic structural view of an anchoring elastomer of example 3 of the present invention;
FIG. 7 is a schematic structural view of an anchoring elastomer of example 4 of the present invention;
FIG. 8 is a schematic structural view of an anchoring elastomer according to example 5 of the present invention;
FIG. 9 is a schematic side view of an anchoring elastomer according to example 6 of the present invention;
FIG. 10 is a schematic side view of an anchoring elastomer according to example 7 of the present invention;
FIG. 11 is a schematic side view of an anchoring elastomer according to example 8 of the present invention;
FIG. 12 is a schematic side view of an anchoring elastomer according to example 9 of the present invention;
FIG. 13 is a schematic side view of an anchoring elastomer according to example 10 of the present invention;
FIG. 14 is a schematic side view of an anchoring elastomer according to example 11 of the present invention;
FIG. 15 test point placement for speaker amplitude testing;
FIG. 16 is an example of a conventional approach loudspeaker amplitude test curve;
FIG. 17 is an example of a loudspeaker amplitude test curve according to aspects of the present invention;
in the figure, the position of the upper end of the main shaft,
1-magnetic shield, 2-elastic diaphragm, 3-dome, 4-elastic plate, 41 a-first pad terminal, 41 b-second pad terminal, 42-elastic plate body, 43-anchoring elastomer, 44-terminal, 45-conductive layer, 5-voice coil, 51 a-first lead terminal, 51 b-second lead terminal, 6-frame, 61-terminal, 7-ring pole piece, 8-center pole piece, 9-magnetic steel, 91-center magnetic steel, 92-first side magnetic steel, 93-second side magnetic steel, 94-third side magnetic steel, 95-fourth side magnetic steel.
Detailed Description
In order to more clearly understand the technical features, objects, and effects of the present invention, embodiments of the present invention will now be described with reference to the accompanying drawings.
Embodiment 1A speaker
As shown in fig. 2-4, the present invention provides a speaker
The invention provides a loudspeaker which comprises an elastic diaphragm 2, a dome 3, an elastic plate 4, a voice coil 5, a basin frame 6, axially symmetrical annular pole pieces 7, a central pole piece 8, magnetic steel 9 and a magnetic cover 1, wherein the elastic diaphragm, the dome 3, the elastic plate, the voice coil 5 and the basin frame are accommodated in an accommodating space.
The elastic plate 4 is made of a flexible material;
the voice coil 5 comprises a first lead terminal 51a and a second lead terminal 51 b;
the first lead terminal 51a and the second lead terminal 51b of the voice coil 5 are respectively welded on the two first pad terminals 41a and the second pad terminal 41b of the elastic plate 4, meanwhile, the voice coil 5, the elastic plate 4, the ball top 3 and the elastic diaphragm 2 are bonded together to form a vibration system, relative movement between the two first lead terminals 51a and the second lead terminals 51b of the voice coil 5 and the vibration system is avoided in the movement process of the vibration system, and fatigue damage caused by long-time movement is prevented.
The basin frame 6 is provided with four wiring terminals 61, the four wiring terminals 61 of the basin frame 6 are respectively connected with the four terminals 44 of the spring plate 4 in a welding manner, two wiring terminals 61 are connected with external electric signals, and the two terminals 44 respectively welded with the two wiring terminals 61 are electrically connected with the first pad terminal 41a and the second pad terminal 41b through the conductive layer 45;
the first pad terminal 41a and the second pad terminal 41b electrically connect the two first lead terminals 51a and the second lead terminals 51b of the voice coil 5.
The magnetic circuit system comprises: the magnetic shield comprises an annular pole piece 7, a central pole piece 8, magnetic steel 9 and a magnetic shield 1 which are axially symmetrical. The magnetic steel 9 comprises a central magnetic steel 91, a first side magnetic steel 92, a second side magnetic steel 93, a third side magnetic steel 94 and a fourth side magnetic steel 95; wherein the axially symmetrical annular pole pieces 7 are injection-molded on the pot frame 6. The four corners of the ring-shaped pole piece 7 are hollowed out for avoiding the anchoring elastic body 43 of the elastic plate 4.
The axial symmetry of the annular pole piece 7 can realize the axial symmetry of the whole magnetic circuit, and the complete symmetry of the magnetic circuit system is favorable for reducing the distortion of the loudspeaker.
The magnetic circuit system is matched and bonded with the basin frame 6, and the vibration system is matched and bonded with the basin frame 6 to form a complete loudspeaker.
When the loudspeaker works, an external signal is connected to the two wiring terminals 61 of the basin frame 6, and the voice coil vibrates under the action of a magnetic field force after being electrified to push a vibration system to vibrate, so that the function of the loudspeaker is realized. Because the voice coil lead wire moves synchronously with the vibration system through the flexible structure, the conductive material in the flexible structure replaces the suspended voice coil wire, the generation of the suspended part of the voice coil wire is avoided, and the problem of fatigue wire breakage is fundamentally solved.
In addition, the axially symmetric anchoring elastic bodies enable the vibration system of the loudspeaker to be stressed uniformly, so that the swinging vibration is avoided, and the output power of the loudspeaker can be improved.
In order to maintain the stability of the vibration system, the elastic plate 4 is provided with four axially symmetrical anchoring elastic bodies 43;
the other ends of the four axially symmetrical anchoring elastic bodies 43 are respectively connected with a terminal 44, and a conductive layer 45 is further arranged on the elastic plate 4, wherein the conductive layer 45 is used for electrically connecting the terminal 44 with the first pad terminal 41a or the second pad terminal 41 b;
the anchoring elastic body 43 may include one or more arcs bent in a three-dimensional direction;
any one of the multiple arcs can meet the mechanical matching and performance requirements of the loudspeaker by changing the shape of the radian.
Preferably, the anchoring elastic body 43 adopts a combination of planar and three-dimensional shapes, so as to further improve the mechanical stress state of the anchoring elastic body and increase the linear range of the anchoring elastic body, which is beneficial to the large-amplitude and low-distortion performance of the loudspeaker.
The three-dimensional design of the anchoring elastic body 43 is more favorable for improving the mechanical stress state of the anchoring elastic body, increasing the linear range of the anchoring elastic body and being favorable for the large-amplitude and low-distortion performance of the loudspeaker.
The four corners of the annular pole piece 7 are hollowed out for avoiding the anchoring elastic body 43 of the flexible structure. The axial symmetry of the annular pole piece can realize the axial symmetry of the whole magnetic circuit, and the complete symmetry of the magnetic circuit system is favorable for reducing the distortion of the loudspeaker.
The four anchoring elastic bodies 43 of the elastic plate 4 are symmetrically designed, so that the stress state is axially symmetrical, and the stress of the vibration system is uniform, as shown in fig. 2, and no swinging vibration is generated. Corresponding to fig. 1, the simulation result of the structure of fig. 1 shows that the four force arms are asymmetrically stressed.
Wherein, the plane direction refers to the shape of the anchoring elastic body on the plane parallel to the paper surface; the solid direction refers to the shape of the anchoring elastomer in a plane perpendicular to the paper.
The bending treatment of the flexible conductive material can enlarge the linear range of the flexible conductive material, has higher structural strength, avoids the flexible conductive material from deforming after long-time work, and the enlarged linear range is beneficial to the low-distortion design of products. The symmetric arrangement of the flexible conductive materials can solve the problem of swinging vibration caused by uneven stress of a loudspeaker vibration system, and is favorable for high-power performance of the loudspeaker. The flexible structure replaces a lead wire, and the symmetrical design of the magnetic circuit system is beneficial to the performance of the loudspeaker.
Embodiment 2A speaker
As shown in fig. 5, the present invention also provides another speaker, which is different from embodiment 1 in that: the anchoring elastic body 43 is equally wide at both ends and in the middle. The elastic plate 4 is divided into two layers or three layers. The two-layer structure comprises a base material and a conductive layer; the three-layer structure comprises a base material, a conductive layer and a protective layer. Wherein the substrate is preferably polyimide and the conductive layer is preferably calendered copper. The conductive layer 45 is formed from rolled copper having a thickness of 5 mu to 20 mu, which is stronger than a deposited conductive layer of comparable thickness. The scheme has the advantages of simple structure, easy process realization and uniform stress on all positions of the anchoring elastomer.
Embodiment 3A speaker
As shown in fig. 6, the present invention also provides another speaker, which is different from the above-mentioned embodiment in that: the anchoring elastic body 43 has a width greater at both ends than at the middle. The elastic plate 4 is divided into two layers or three layers. The two-layer structure comprises a base material and a conductive layer; the three-layer structure comprises a base material, a conductive layer and a protective layer. Wherein the substrate is preferably polyimide and the conductive layer is preferably calendered copper. The conductive layer 45 is formed from rolled copper having a thickness of 5 mu to 20 mu, which is stronger than a deposited conductive layer of comparable thickness. The design can reduce the stress on the middle part of the anchoring elastic body during vibration deformation, so that the middle position of the anchoring elastic body deforms greatly, the structural design and the performance of the loudspeaker are improved, and the anchoring elastic body can be preferentially applied when the vibration spaces at the two ends of the anchoring elastic body 43 are limited.
Embodiment 4A speaker
As shown in fig. 7, the present invention also provides another speaker, which is different from the above-mentioned embodiment in that: the anchoring elastic body 43 has a width smaller at both ends than at the middle. The elastic plate 4 is divided into two layers or three layers. The two-layer structure comprises a base material and a conductive layer; the three-layer structure comprises a base material, a conductive layer and a protective layer. Wherein the substrate is preferably polyimide and the conductive layer is preferably calendered copper. The conductive layer 45 is formed from rolled copper having a thickness of 5 mu to 20 mu, which is stronger than a deposited conductive layer of comparable thickness. This design can increase the stress applied to the middle portion of the anchoring elastic body 43 during vibration deformation, and can reduce the deformation of the middle portion of the anchoring elastic body, and this scheme can be adopted when the vibration space is limited at the center position of the anchoring elastic body.
Example 5A speaker
As shown in fig. 8, the present invention also provides another speaker, which is different from the above-mentioned embodiment in that: the anchoring elastic body 43 is in a plane with a certain bending shape, and the elastic plate 4 is divided into two layers or three layers. The two-layer structure comprises a base material and a conductive layer; the three-layer structure comprises a base material, a conductive layer and a protective layer. Wherein the substrate is preferably polyimide and the conductive layer is preferably calendered copper. The conductive layer 45 is formed from rolled copper having a thickness of 5 mu to 20 mu, which is stronger than a deposited conductive layer of comparable thickness. The design can maximally improve the length of the anchoring elastic body 43, is beneficial to increasing the linear range of the anchoring elastic body 43 and is beneficial to optimizing the acoustic performance of the loudspeaker.
Embodiment 6A speaker
As shown in fig. 9, the present invention also provides another speaker, which is different from the above-mentioned embodiment in that: the anchoring elastic body 43 is designed as a segment of arc, and the anchoring elastic body 43 comprises a segment of standard arc in the three-dimensional direction. The anchoring elastic body 43 is bilaterally symmetrical. The elastic plate 4 is divided into two layers or three layers. The two-layer structure comprises a base material and a conductive layer; the three-layer structure comprises a base material, a conductive layer and a protective layer. Wherein the substrate is preferably polyimide and the conductive layer is preferably calendered copper. The conductive layer 45 is formed from rolled copper having a thickness of 5 mu to 20 mu, which is stronger than a deposited conductive layer of comparable thickness.
Example 7A speaker
As shown in fig. 10, the present invention also provides another speaker, which is different from the above-mentioned embodiment in that: the anchoring elastic body 43 is designed as a segment of an arc, and the anchoring elastic body 43 comprises a segment of an arc in the three-dimensional direction. The anchoring elastic body 43 is asymmetric left and right. The arc top is deflected to the right. The elastic plate 4 is divided into two layers or three layers. The two-layer structure comprises a base material and a conductive layer; the three-layer structure comprises a base material, a conductive layer and a protective layer. Wherein the substrate is preferably polyimide and the conductive layer is preferably calendered copper. The conductive layer 45 is formed from rolled copper having a thickness of 5 mu to 20 mu, which is stronger than a deposited conductive layer of comparable thickness. Is beneficial to avoiding the position of the mechanical structure, can improve the stress state of the anchoring elastic body 43 and is beneficial to improving the acoustic performance of the loudspeaker.
Embodiment 8A speaker
As shown in fig. 11, the present invention also provides another speaker, which is different from the above-mentioned embodiment in that: the anchoring elastic body 43 is designed as a segment of an arc, and the anchoring elastic body 43 comprises a segment of an arc in the three-dimensional direction. The anchoring elastic body 43 is asymmetric left and right. The arc top is skewed to the left. The elastic plate 4 is divided into two layers or three layers. The two-layer structure comprises a base material and a conductive layer; the three-layer structure comprises a base material, a conductive layer and a protective layer. Wherein the substrate is preferably polyimide and the conductive layer is preferably calendered copper. The conductive layer 45 is formed from rolled copper having a thickness of 5 mu to 20 mu, which is stronger than a deposited conductive layer of comparable thickness. Is beneficial to avoiding the position of the mechanical structure, can improve the stress state of the anchoring elastic body 43 and is beneficial to improving the acoustic performance of the loudspeaker.
Embodiment 9A speaker
As shown in fig. 12, the present invention also provides another speaker, which is different from the above-mentioned embodiment in that: the anchoring elastic body 43 is designed in a way that two ends of a segment of arc are not equal in height, and the anchoring elastic body 43 comprises a segment of arc in the three-dimensional direction. The equal height design of the two ends of the anchoring elastic body 43 cannot satisfy all mechanical structural schemes for matching with other parts of the loudspeaker. The elastic plate 4 is divided into two layers or three layers. The two-layer structure comprises a base material and a conductive layer; the three-layer structure comprises a base material, a conductive layer and a protective layer. Wherein the substrate is preferably polyimide and the conductive layer is preferably calendered copper. The conductive layer 45 is formed from rolled copper having a thickness of 5 mu to 20 mu, which is stronger than a deposited conductive layer of comparable thickness. Such a solution is maximally compatible with the dimensioning of other components of the loudspeaker.
EXAMPLE 10A speaker
As shown in fig. 13, the present invention also provides another speaker, which is different from the above-mentioned embodiment in that: the anchoring elastic body 43 is designed as a multi-segment arc, and the anchoring elastic body 43 includes two segments of arcs in the three-dimensional direction. The effective length of the anchoring elastic body 43 is increased, the linear range of the anchoring elastic body 43 is increased, and the acoustic performance of the loudspeaker is improved. The elastic plate 4 is divided into two layers or three layers. The two-layer structure comprises a base material and a conductive layer; the three-layer structure comprises a base material, a conductive layer and a protective layer. Wherein the substrate is preferably polyimide and the conductive layer is preferably calendered copper. The conductive layer 45 is formed from rolled copper having a thickness of 5 mu to 20 mu, which is stronger than a deposited conductive layer of comparable thickness.
EXAMPLE 11A speaker
As shown in fig. 14, the present invention also provides another speaker, which is different from the above-mentioned embodiment in that: the anchoring elastic body 43 is designed as a multi-segment arc, and the anchoring elastic body 43 includes three segments of arcs in the three-dimensional direction. The effective length of the anchoring elastic body 43 is increased, the linear range of the anchoring elastic body 43 is increased, and the acoustic performance of the loudspeaker is improved. The elastic plate 4 is divided into two layers or three layers. The two-layer structure comprises a base material and a conductive layer; the three-layer structure comprises a base material, a conductive layer and a protective layer. Wherein the substrate is preferably polyimide and the conductive layer is preferably calendered copper. The conductive layer 45 is formed from rolled copper having a thickness of 5 mu to 20 mu, which is stronger than a deposited conductive layer of comparable thickness.
According to the loudspeaker provided by the invention, the linear range of the flexible material can be enlarged by bending the flexible material, and the linear range can be enlarged by more than 20% by the existing two-section arc design; the flexible material has high structural strength, and the flexible material does not deform after long-time working, so that the low-distortion design of the product is facilitated, and the distortion of the current test scheme is reduced by more than 30%; the axial symmetrical arrangement of the anchoring elastic bodies can ensure that the loudspeaker vibration system is stressed uniformly without generating swinging vibration, thereby being beneficial to the high-power performance of the loudspeaker; the swing vibration probability of the product in the current test scheme is reduced from 90% to below 10%; the flexible structure replaces a lead, the mechanical strength of the flexible structure is superior to that of a voice coil wire, fatigue wire breakage caused by high-frequency pulling can not be generated after the loudspeaker works for a long time, and the flexible structure is superior to a voice coil wire suspension scheme and an immersion metal layer scheme in a mainstream scheme; the symmetrical design of the magnetic circuit system can ensure that all positions of the voice coil are uniformly stressed and can inhibit the generation of swinging vibration; the flexible structure can be matched with various mainstream membrane materials to form a loudspeaker, is not influenced by the membrane materials and the thickness, and has wide application range; the mechanical strength of the conductive layer is greater than that of the deposited or electrolyzed conductive layer.
The foregoing is illustrative of the best mode of the invention and details not described herein are within the common general knowledge of a person of ordinary skill in the art. The scope of the present invention is defined by the appended claims, and any equivalent modifications based on the technical teaching of the present invention are also within the scope of the present invention.

Claims (9)

1. A loudspeaker comprising a vibration system, characterized in that: the vibration system comprises a springboard (4);
four axially symmetrical anchoring elastic bodies (43) are designed on the elastic plate (4);
the anchoring elastic body (43) adopts the combination of shapes of a plane and a three-dimensional direction;
the width of the two ends of the anchoring elastic body (43) is greater than or less than the middle width;
the anchoring elastic body (43) is designed to be at least one arc in the three-dimensional direction;
when the anchoring elastic body (43) is designed to be a section of arc in the three-dimensional direction, the anchoring elastic body (43) is designed to be the section of arc with two ends of unequal height;
the anchoring elastic body (43) is asymmetric left and right, and the arc top deflects leftwards or rightwards.
2. A loudspeaker according to claim 1, wherein: the spring plate (4) further comprises a spring plate body (42), a terminal (44), a first pad terminal (41 a) and a second pad terminal (41 b);
the elastic plate is characterized in that one end of the anchoring elastic body (43) is connected with the elastic plate body (42), the other end of the anchoring elastic body (43) is connected with the terminal (44), and the elastic plate body (42) is provided with a first pad terminal (41 a) and a second pad terminal (41 b).
3. A loudspeaker according to claim 1, wherein: the anchoring elastic body (43) is bent in a planar direction.
4. A loudspeaker according to claim 1, wherein: the anchoring elastic body (43) comprises two arcs or three arcs in the three-dimensional direction.
5. A loudspeaker according to claim 1, wherein: the elastic plate (4) is made of flexible materials.
6. A loudspeaker according to claim 1, wherein: the springboard (4) further comprises a conductive layer (45).
7. A loudspeaker according to claim 6, wherein: the conductive layer (45) is made of rolled copper.
8. A loudspeaker according to claim 1, wherein: the loudspeaker further comprises an annular pole piece (7), wherein the annular pole piece (7) is designed to be hollowed at four inner corners and used for avoiding and anchoring the elastic body (43).
9. A loudspeaker according to claim 1, wherein: the vibration system further comprises a voice coil (5), a dome (3) and an elastic diaphragm (2), wherein the voice coil (5), the elastic plate body (42), the dome (3) and the elastic diaphragm (2) are bonded together;
the elastic membrane (2) is provided with an accommodating space;
the elastic plate (4) comprises four axially symmetrical anchoring elastic bodies (43), one ends of the four axially symmetrical anchoring elastic bodies (43) are respectively connected with an elastic plate body (42), and a first pad terminal (41 a) and a second pad terminal (41 b) are arranged on the elastic plate body (42);
the other ends of the four axially symmetrical anchoring elastic bodies (43) are respectively connected with a terminal (44), a conductive layer (45) is further arranged on the elastic plate (4), and the conductive layer (45) is used for electrically connecting the terminal (44) with the first pad terminal (41 a) or the second pad terminal (41 b);
the voice coil (5) comprises a first lead terminal (51 a) and a second lead terminal (51 b);
the first lead terminal (51 a) and the second lead terminal (51 b) are soldered on the first pad terminal (41 a) and the second pad terminal (41 b), respectively;
the elastic plate (4) is made of a flexible material;
the loudspeaker also comprises a magnetic circuit system;
the magnetic circuit system comprises an annular pole piece (7), a central pole piece (8), magnetic steel (9) and a magnetic cover (1); the annular pole pieces (7) are axially symmetrically arranged, and the axially symmetric annular pole pieces (7) are injected on the basin frame (6);
the basin frame (6) is provided with four wiring terminals (61), the four wiring terminals (61) of the basin frame (6) are respectively connected with the four terminals (44) of the elastic plate (4) in a welding manner, two wiring terminals (61) are connected with an external electric signal, and the two terminals (44) respectively welded with the two wiring terminals (61) are electrically connected with a first pad terminal (41 a) and a second pad terminal (41 b) through a conductive layer (45);
the magnetic circuit system is matched and bonded with the basin frame (6), and the vibration system is matched and bonded with the basin frame (6) to form a complete loudspeaker.
CN201711050806.1A 2017-03-31 2017-10-31 Loudspeaker Active CN107682790B (en)

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CN207369296U (en) 2018-05-15

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