CN111131982A - Centering support piece and loudspeaker with same - Google Patents
Centering support piece and loudspeaker with same Download PDFInfo
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- CN111131982A CN111131982A CN202010226422.6A CN202010226422A CN111131982A CN 111131982 A CN111131982 A CN 111131982A CN 202010226422 A CN202010226422 A CN 202010226422A CN 111131982 A CN111131982 A CN 111131982A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
- H04R9/06—Loudspeakers
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
- H04R9/02—Details
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
- H04R9/02—Details
- H04R9/025—Magnetic circuit
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- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Diaphragms For Electromechanical Transducers (AREA)
Abstract
The invention discloses a centering support piece which comprises a fixing part and a connecting cantilever, wherein the fixing part comprises a first fixing part and a second fixing part, the first fixing part is connected with the second fixing part through the connecting cantilever, the connecting cantilever comprises a root part and a cantilever body, the root part is positioned at two ends of the cantilever body and comprises a first root part and a second root part, the cantilever body is connected with the first fixing part through the first root part and is connected with the second fixing part through the second root part, the cross section of the root part comprises at least two connecting sections, each connecting section comprises two inner arc lines and two outer arc lines which are oppositely arranged, and the normal directions of the inner arc lines and the outer arc lines of the connecting sections which are close to and connected with the fixing part are oppositely arranged. Has the following advantages: the problem of because of the root and the cantilever adopt simple transition of bending lead to the root bend the department stress too big, can follow the inboard crackle of root to fatigue fracture after long-term vibration is solved.
Description
Technical Field
The invention discloses a centering support piece and a loudspeaker with the same, and belongs to the technical field of electroacoustic.
Background
The existing speaker includes: auxiliary system, magnetic circuit and vibration system, magnetic circuit are provided with the magnetic gap, and vibration system includes the vibrating diaphragm, combines centering piece and voice coil loudspeaker voice coil together with the vibrating diaphragm, and the voice coil loudspeaker voice coil sets up in the magnetic gap, and the current change that sets up in the voice coil loudspeaker voice coil in the magnetic gap makes the voice coil loudspeaker voice coil receive magnetic field force effect to produce the vibration, drives the vibrating diaphragm vibration sound production. The centering disk is one of basic components of the loudspeaker, and the function of the centering disk is mainly to ensure the correct position of the voice coil in the magnetic gap, keep the vibration system to reciprocate only along the axial direction when the voice coil is stressed, provide the elastic force when the vibration system reciprocates, and determine the resonance frequency of the loudspeaker together with the diaphragm voice coil of the vibration system.
The ultra-linear micro loudspeaker can greatly improve the space utilization rate and the vibration amplitude of the sounding device. Therefore, the sound quality, especially low-frequency sound, can be greatly improved. The ultra-linear micro-speaker needs to use the centering chip to replace the traditional lead wire to conduct the circuit, and has the effects of increasing the amplitude and suppressing the top polarization of the ball. However, when the centering chip is subjected to a reliability and durability test, the problem of high-cycle fatigue fracture failure of metal is easily caused by rolled copper in the centering chip.
The shape of the prior art centralizer can be designed into various shapes according to needs, and fig. 4-8 exemplify the shapes of several common centralizers.
The centering support piece comprises a first fixing part located on the outermost side, a second fixing part located at the middle position and a connecting cantilever of the first fixing part and the second fixing part, the first fixing part is fixedly connected with the auxiliary system, the second fixing part is connected with the voice coil, the voice coil is electrically connected with an external circuit through a conducting layer of the centering support piece, the first fixing part and the second fixing part are integrally connected through the connecting cantilever, the connecting cantilever comprises a root and a cantilever body, and the root is arranged at two ends of the cantilever body.
The existing centering branch piece is composed of an insulating base material layer and a conducting layer, the root of the centering branch piece connected with the cantilever and the joint of the cantilever body are in simple bending transition, large shear stress exists on the inner side of the root, the stress of the bending part of the root is too large, cracks can be generated from the inner side of the root until fatigue fracture can be generated after long-term vibration, and the copper layer in the centering branch piece is fractured and loses the conducting and supporting performances.
At present, in order to solve the problem of fracture of the conducting layer of the centering branch piece caused by excessive stress, for example, in the patent of patent number 201720877164.1, a semicircular notch is formed in the inner side of the arc at the joint of the root of the conducting layer and the cantilever body, when the arc root is elastically deformed, stress concentration is generated on the inner side of the arc at the root, and the conducting layer at the position is provided with an avoiding notch, so that the stress is concentrated on the insulating base material layer at the position, the stress concentration on the conducting layer is avoided, and the conducting layer at the position is prevented from generating cracks under the stress action.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a centering disk and a loudspeaker with the centering disk, aiming at the defects, and the following purposes are realized:
the problem of because of the root and cantilever adopt simple transition of bending lead to the root to bend the department stress too big, can follow the inboard crackle of root after long-term vibration and lead to fatigue fracture is solved, the stress of dispersion concentration reduces the maximum stress that the root reaches, improves the fatigue resistance of centering strut piece.
In order to solve the technical problems, the invention adopts the following technical scheme:
the utility model provides a centering support piece, includes the fixed part and connects the cantilever, the fixed part includes first fixed part and second fixed part, and first fixed part passes through with the second fixed part connect the cantilever to be connected, connect the cantilever and include root and cantilever body, and the root is located the both ends of cantilever body, including first root and second root, the cantilever body passes through first root and is connected with first fixed part, and the cantilever body passes through the second root to be connected with the second fixed part, the cross-section of root includes two at least linkage segments, every the linkage segment includes the interior arc line and the outer arc line of two relative settings, is close to and connects the normal direction opposite setting of the interior arc line and the outer arc line of the linkage segment of fixed part.
Further, the distance between the inner arc line and the outer arc line of the connecting section close to and connected with the fixing part is gradually narrowed along the direction extending from the ending part of the root part to the starting part of the root part.
Furthermore, the cross section of the second root comprises two connecting sections, namely a fourth connecting section and a fifth connecting section, two ends of the fifth connecting section are respectively connected with the cantilever body and one end of the fourth connecting section, and the other end of the fourth connecting section is close to and connected with the second fixing part;
the radius of curvature of the outer arc line of the fourth connecting section is smaller than that of the inner arc line thereof.
Furthermore, the inner arc line of the fifth connecting section is connected with the inner arc line of the fourth connecting section, and the normal directions of the inner arc line and the inner arc line are opposite and the connecting part of the inner arc line and the inner arc line are in tangential transition;
the outer arc line of the fifth connecting section is connected with the outer arc line of the fourth connecting section, and the normal direction is unchanged.
Furthermore, the tangent angle of the joint of the inner arc line of the fifth connecting section and the inner arc line of the fourth connecting section is 110-130 degrees.
Furthermore, the fifth connecting section is in a sector ring shape, and the radius of curvature of the sector ring shape of the fifth connecting section is smaller than that of the inner arc line of the fourth connecting section.
Further, the cross section of the first root portion comprises a first connecting section, and the first connecting section is close to and connected with the first fixing portion;
the radius of curvature of the outer arcuate line of the first link section is greater than the radius of curvature of the inner arcuate line thereof.
Furthermore, the cross section of the first root part also comprises a second connecting section, and two ends of the second connecting section are respectively connected with the first connecting section and the cantilever body;
the inner arc line of the second connecting section is connected with the inner arc line of the first connecting section, and the normal direction is unchanged;
the outer arc line of the second connecting section is connected with the outer arc line of the first connecting section, and the normal directions of the two are opposite, and the connecting part of the two is in tangent transition.
Furthermore, the tangent angle of the joint of the outer arc line of the second connecting section and the outer arc line of the first connecting section is 110-130 degrees.
Furthermore, the second connecting section is in a sector ring shape, and the radius of curvature of the sector ring shape of the second connecting section is smaller than that of the outer arc line of the first connecting section.
Further, the cross-section of the first root further comprises a third connecting section, one end of the first connecting section and one end of the third connecting section are connected to two ends of the second connecting section respectively, the other end of the third connecting section is connected with the cantilever body, and the other end of the first connecting section is connected with the first fixing portion.
Furthermore, the second connecting section and the third connecting section are in a sector ring shape, and the normal direction of the second connecting section is opposite to the normal direction of the third connecting section.
Furthermore, the inner arc line of the second connecting section is connected with the inner arc line of the third connecting section, and the normal directions of the inner arc line and the third connecting section are opposite and the connecting part is in tangential transition;
the outer arc line of the second connecting section is connected with the outer arc line of the third connecting section, and the normal directions of the two are opposite, and the connecting part of the two is in tangent transition.
Furthermore, the cutting angle of the joint of the inner arc line of the second connecting section and the inner arc line of the third connecting section is 10-20 degrees;
the cutting angle of the joint of the outer arc line of the second connecting section and the outer arc line of the third connecting section is 10-20 degrees.
Furthermore, the radius of curvature of the sector ring shape of the third connecting section is larger than that of the sector ring shape of the second connecting section, and the radius of curvature of the outer arc line of the first connecting section is larger than that of the sector ring shape of the third connecting section.
A loudspeaker comprising an auxiliary system, a magnetic circuit system and a vibration system, wherein the magnetic circuit system and the vibration system are accommodated and fixed in a containing cavity formed by the auxiliary system, the vibration system comprises a diaphragm, a centering disk and a voice coil which are combined together, the centering disk is the centering disk of any one of claims 1 to 15, a first fixing part of the centering disk is fixedly connected with the auxiliary system of the loudspeaker, and a second fixing part of the centering disk is connected with the voice coil.
By adopting the technical scheme, compared with the prior art, the invention has the following technical effects:
the variable cross section and curve transition form is adopted at the root of the centering branch piece, so that the stress concentration is relieved, the maximum stress of the centering branch piece in the vibration process is reduced, the fatigue resistance of the centering branch piece is improved, and the popularization of a large-amplitude micro loudspeaker is facilitated.
The cross-section of root includes two at least linkage segments, every the linkage segment includes two relative inner arc line and the outer arc line that sets up, is close to and connects the normal direction of the inner arc line of the linkage segment of fixed part and outer arc line is opposite to be set up, has enlarged the root and has warp the region of undertaking, reduces maximum stress value and stress concentration degree, reduces big stress distribution area, improves its antifatigue ability.
The distance between the inner arc line and the outer arc line of the connecting section close to and connected with the fixing part is gradually narrowed along the direction extending from the ending part of the root part to the starting part of the root part, the width of the ending part of the normal root part of the inner arc line and the outer arc line of the connecting section close to and connected with the fixing part is properly increased, and the root part can be prevented from being deformed too much.
In embodiments 1 to 3, the second connecting section and the third connecting section adopt a combined deformation form of bending, twisting and stretching, that is, two arc lines between two adjacent connecting sections are connected, and the normal directions of the two connected arc sections are opposite and the connection part is in tangential transition, so that the excessive deformation of the root cut-off part is avoided, the maximum stress value and the stress concentration degree are reduced, the large stress distribution area is reduced, the uniform transmission of stress is realized, and the fatigue resistance of the connecting section is improved.
The radius of curvature of the second connecting section sector ring is smaller than that of the first connecting section outer arc line or that of the fifth connecting section sector ring is smaller than that of the fourth connecting section inner arc line, so that the root stop part can be prevented from deforming excessively, stress is uniformly transmitted, and the fatigue resistance of the stress transmission device is improved.
Through finite element analysis, the maximum stress reached by the root of the optimized centering branch piece cantilever can be reduced to forty-five percent of the original structure at most, and the fatigue resistance of the optimized centering branch piece is obviously improved.
Drawings
In order to more clearly illustrate the detailed description of the invention or the technical solutions in the prior art, the drawings that are needed in the detailed description of the invention or the prior art will be briefly described below. Throughout the drawings, like elements or portions are generally identified by like reference numerals. In the drawings, elements or portions are not necessarily drawn to scale.
FIG. 1 is a schematic view of a conductive layer of a centering pad in embodiments 1-3 of the present invention;
FIG. 2 is a stress distribution diagram of a centering pad according to the prior art;
FIG. 3 is a stress distribution diagram of an optimized centering piece according to embodiment 1 of the present invention;
FIGS. 4-8 illustrate the shape of the orientation support in the background of the invention;
FIG. 9 is a schematic view of a conductive layer of a centering pad in embodiments 4-6 of the present invention;
FIG. 10 is a schematic view of a conductive layer of a centering pad in examples 7 to 9 of the present invention;
in the figure:
1-a first connection section, 2-a second connection section, 3-a third connection section, 4-a fourth connection section, 5-a fifth connection section, 6-a first fixing section, 7-a second fixing section, 8-a connection cantilever, 81-a cantilever body, 82-a first root, 83-a second root, 21-a first inner arc line, 22-a second inner arc line, 23-a third inner arc line, 11-a first outer arc line, 12-a second outer arc line, 13-a third outer arc line, 41-a fourth outer arc line, 42-a fifth outer arc line, 51-a fourth inner arc line, 52-a fifth inner arc line.
Detailed Description
Example 1
As shown in FIG. 1, a damper includes a fixing portion and a connecting arm 8, the fixing portion includes a first fixing portion 6 and a second fixing portion 7, the first fixing portion 6 is connected to the second fixing portion 7 through the connecting arm 8, the first fixing portion 6 is fixedly connected to an auxiliary system of a speaker, the second fixing portion 7 is connected to a voice coil of the speaker, the voice coil of the speaker is electrically connected to an external circuit through a conductive layer of the damper, the first fixing portion 6 and the second fixing portion 7 are integrally connected to each other through the connecting arm 8, the connecting arm 8 includes a root portion and an arm body 81, the root portion includes a first root portion 82 and a second root portion 83, the first root portion 82 and the second root portion 83 are located at two ends of the arm body 81, the arm body 81 is connected to the first fixing portion 6 through the first root portion 82, the arm body 81 is connected to the second fixing portion 7 via the second root portion 82.
One side of the first root 82 close to the first fixing portion 6 is the inner side direction of the root, and the other side of the first root 82 far from the first fixing portion 6 is the outer side direction of the root.
The cross-section of first root 82 comprises three linkage segment, is first linkage segment 1, second linkage segment 2 and third linkage segment 3 respectively, and first linkage segment 1 one end and 3 one end of third linkage segment are connected respectively at the both ends of second linkage segment 2, and cantilever body 81 is connected to the other end of third linkage segment 3, and first fixed part 6 is connected to the other end of first linkage segment 1.
The linkage segment includes relative inner arc line and the outer arc line that sets up, and inner arc line is located one side that first root 82 is close to first fixed part 6, and outer arc line is located one side that first root 82 keeps away from first fixed part 6.
The joint of the third connecting section 3 and the cantilever body 81 is the root starting position of the first root 82, and the joint of the first connecting section 1 and the first fixing part 6 is the root ending position of the first root 82.
First linkage segment 1 is the torsional deformation region, first linkage segment 1 includes first interior arc line 21 and first outer arc line 11, and first interior arc line 21 is opposite with the normal direction of first outer arc line 11, and first interior arc line 21 is buckled towards the outside direction of root, and its normal direction sets up towards the inboard direction of root, and first outer arc line 11 is buckled towards the inboard direction of root, and its normal direction sets up towards the outside direction of root.
The curvature radius of the first inner arc line 21 is smaller than that of the first outer arc line 11, so that the phenomenon that the root part cut-off part deforms too much to influence the uniform transmission of stress is avoided.
The third linkage segment 3 is the tensile deformation region, the third linkage segment 3 includes the outer arc line 13 of arc line 23 and third in the third, and the normal direction of arc line 23 and the outer arc line 13 of third in the third is the same, and the outer arc line 13 of arc line 23 and third in the third all buckles towards the inboard direction of root, and its normal direction sets up towards the outside direction of root.
The normal direction of the arc line refers to the direction of the normal line and is perpendicular to the tangential direction of the arc line.
The curvature radius is the reciprocal of the curvature, and the curvature of the plane curve is the rotation rate of the tangent direction angle of a certain point on the curve to the arc length, and is defined by differentiation, and indicates the degree of deviation of the curve from a straight line.
First fixed part 6 is connected in extending to the one end of first interior arc line 21, and 22 one end of second interior arc line are connected in extending to the first interior arc line 21 other end, and 23 one end of third interior arc line are connected to the second interior arc line 22 other end, and the cantilever body 81 is connected in extending to the third interior arc line 23 other end.
The first inner arc line 21 and the second inner arc line 22 have the same normal direction, and form an arc line.
The junction of the second inner arc line 22 and the third inner arc line 23 is in tangential transition, and the tangent angle c of the junction of the second inner arc line 22 and the third inner arc line 23 is 15 degrees.
First outer arc line 11 one end is extended and is connected first fixed part 6, and the outer arc line 12 one end of second is extended and is connected to the 11 other end of first outer arc line, and the outer arc line 12 other end of second is extended and is connected the outer arc line 13 one end of third, and the outer arc line 13 other end of third extends and is connected with cantilever body 81.
The joint of the third outer arc line 13 and the second outer arc line 12 is in tangent transition, the tangent angle b of the joint of the third outer arc line 13 and the second outer arc line 12 is 15 degrees, the joint of the second outer arc line 12 and the first outer arc line 11 is in tangent transition, and the tangent angle a of the joint of the second outer arc line 12 and the first outer arc line 11 is 120 degrees.
The curvature radius of the first outer arc line 11, the second outer arc line 12 and the third outer arc line 13 is continuously and slowly changed, the first outer arc line 11, the second outer arc line 12 and the third outer arc line 13 are not bent obviously, generally speaking, the curvature radius of the first outer arc line 11 is larger than that of the third outer arc line 13, and the curvature radius of the third outer arc line 13 is larger than that of the second outer arc line 12.
The second inner arc line 22 and the second outer arc line 12 have the same curvature radius, and the third inner arc line 23 and the third outer arc line 13 have the same curvature radius, so that the root is prevented from being severely deformed, and stress can be uniformly transmitted.
The distance between the first inner arc line 21 and the first outer arc line 11 gradually narrows along the direction that the root end extends to the root starting position, and the connection between the first outer arc line 11 and the second outer arc line 12 is stable, namely, the connection between the first connecting section 1 and the second connecting section 2 is in smooth transition, the width of the end of the root is properly increased, and the root can be prevented from being deformed too much.
The first connecting section 1 and the third connecting section 3 enlarge the root deformation bearing area, and the second connecting section 2 slows down the deformation concentration phenomenon of the first connecting section 1 and the third connecting section 3.
The first connecting section 1 is a torsional deformation region, the second connecting section 2 is a bending-torsional deformation transition region, and the third connecting section 3 is a tensile deformation region, namely, a variable cross section and curve transition form is adopted between the first root part 82 and the cantilever body 81, the simple bending transition of the first root part 82 and the cantilever body 81 is changed into a bending-torsional stretching combined deformation form, the maximum stress value and the stress concentration degree are reduced, the large stress distribution area is reduced, the fatigue resistance of the cantilever body is improved, and the structural rigidity is reduced by adopting single-sided copper.
As shown in fig. 2 and fig. 3, finite element analysis is performed on the centering branch sheet before optimization and the centering branch sheet after optimization respectively, and comparison shows that the centering branch sheet before optimization has a high concentration of the position bearing the large stress, the position bearing the large stress is concentrated at the first bending part, the stress reached by the second bending part and the third bending part of the centering branch sheet before optimization is smaller than that reached by the first bending part, the range of the stress borne by the centering branch sheet before optimization is 6.6062Mpa-92.487 Mpa, and the maximum stress reached by the first bending part of the centering branch sheet before optimization is 92.487 Mpa; the optimized centering branch piece bears the large stress, the concentration degree is low, the position of the optimized centering branch piece bearing the large stress is not concentrated at the first optimized bending part any more, but the optimized first optimized bending part, the optimized second optimized bending part and the optimized third optimized bending part bear the large stress together, the stress bearing range of the optimized centering branch piece is 3.00-42.06 MPa, the maximum stress reached by the first optimized bending part is 42.06MPa, the maximum stress borne by the optimized centering branch piece copper layer can be reduced to 45% of that before optimization, the maximum stress value and the stress concentration degree of the optimized centering branch piece are reduced, and the anti-fatigue capability is remarkably improved.
The deformation transmitted from the body part of the centering branch piece is dispersed after passing through the three-section arc-shaped curve structure, and more areas share the deformation, so that the structural stress of the centering branch piece can be greatly reduced, and the fatigue failure risk is reduced.
The structural improvements described above for the spider are applicable to any form of spider, such as those shown in figures 4-8.
The utility model provides a speaker with centering piece, includes auxiliary system, magnetic circuit and vibration system, and magnetic circuit is provided with the magnetic gap, and vibration system includes the vibrating diaphragm, combines centering piece and voice coil loudspeaker voice coil together with the vibrating diaphragm, and the voice coil loudspeaker voice coil sets up in the magnetic gap, and the current change that sets up in the voice coil loudspeaker voice coil in the magnetic gap makes the voice coil loudspeaker voice coil receive magnetic field force effect to produce the vibration, drives the vibrating diaphragm vibration sound production. The centering support piece mainly has the functions of ensuring the correct position of the voice coil in the magnetic gap, keeping the vibration system to reciprocate only along the axial direction when the voice coil is stressed, providing the elastic force when the vibration system reciprocates, and determining the resonance frequency of the loudspeaker together with the vibration film and the voice coil of the vibration system.
Example 2
The same contents as those in embodiment 1 have already been discussed in detail in embodiment 1, and are not described herein again, and the present embodiment is modified as follows with respect to embodiment 1:
the junction of the third outer arc line 13 and the second outer arc line 12 is in tangential transition, and the tangent angle b of the junction of the third outer arc line 13 and the second outer arc line 12 is 10 degrees.
The joint of the second outer arc line 12 and the first outer arc line 11 is in tangential transition, and the tangent angle a of the joint of the second outer arc line 12 and the first outer arc line 11 is 130 degrees.
The junction of the second inner arc line 22 and the third inner arc line 23 is also in tangential transition, and the tangent angle c of the junction is 10 degrees
The stress bearing range of the optimized centering support sheet is 3.47-43.21 Mpa, the maximum stress of the optimized centering support sheet is 43.21Mpa, the maximum stress of the copper layer of the optimized centering support sheet can be reduced to 47% of that before optimization, the maximum stress value and the stress concentration degree of the optimized centering support sheet are reduced, and the anti-fatigue capability is obviously improved.
Example 3
The same contents as those in embodiment 1 have already been discussed in detail in embodiment 1, and are not described herein again, and the present embodiment is modified as follows with respect to embodiment 1:
the junction of the third outer arc line 13 and the second outer arc line 12 is in tangential transition, and the tangent angle b of the junction of the third outer arc line 13 and the second outer arc line 12 is 20 degrees.
The joint of the second outer arc line 12 and the first outer arc line 11 is in tangential transition, and the tangent angle a of the joint of the second outer arc line 12 and the first outer arc line 11 is 110 degrees.
The junction of the second inner arc line 22 and the third inner arc line 23 is also tangent and transited, and the tangent angle c of the junction is 20 degrees.
The stress bearing range of the optimized centering support sheet is 3.82-45.73 Mpa, the maximum stress of the optimized centering support sheet is 45.73Mpa, the maximum stress of the optimized centering support sheet copper layer can be reduced to 49% before optimization, the maximum stress value and the stress concentration degree of the optimized centering support sheet are reduced, and the anti-fatigue capability is remarkably improved.
Example 4
The same contents as those in embodiment 1 have already been discussed in detail in embodiment 1, and are not described herein again, and the present embodiment is modified as follows with respect to embodiment 1:
as shown in fig. 9, the cross section of the first root 82 is composed of two connecting sections, namely a first connecting section 1 and a second connecting section 2, two ends of the second connecting section 2 are respectively connected with one end of the first connecting section 1 and the cantilever body 81, and the other end of the first connecting section 1 is connected with the first fixing portion 6.
The linkage segment includes relative inner arc line and the outer arc line that sets up, and inner arc line is located one side that first root 82 is close to first fixed part 6, and outer arc line is located one side that first root 82 keeps away from first fixed part 6.
The joint of the second connecting section 2 and the cantilever body 81 is the starting point of the first root 82, and the joint of the first connecting section 1 and the first fixing portion 6 is the ending point of the first root 82.
First linkage segment 1 is the torsional deformation region, first linkage segment 1 includes first interior arc line 21 and first outer arc line 11, and first interior arc line 21 is opposite with the normal direction of first outer arc line 11, and first interior arc line 21 is buckled towards the outside direction of root, and its normal direction sets up towards the inboard direction of root, and first outer arc line 11 is buckled towards the inboard direction of root, and its normal direction sets up towards the outside direction of root.
The curvature radius of the first inner arc line 21 is smaller than that of the first outer arc line 11, so that the phenomenon that the root part cut-off part deforms too much to influence the uniform transmission of stress is avoided.
The second connecting section 2 is in a sector ring shape, the curvature radius of the outer arc line of the first connecting section 1 is larger than that of the sector ring shape of the second connecting section 2, so that the phenomenon that the stop part of the root is deformed too much can be avoided, stress is uniformly transmitted, and the anti-fatigue capability of the connecting section is improved.
The normal direction of the arc line refers to the direction of the normal line and is perpendicular to the tangential direction of the arc line.
The curvature radius is the reciprocal of the curvature, and the curvature of the plane curve is the rotation rate of the tangent direction angle of a certain point on the curve to the arc length, and is defined by differentiation, and indicates the degree of deviation of the curve from a straight line.
First fixed part 6 is connected in the extension of the one end of first interior arc line 21, and arc line 22 one end in the extension of the first interior arc line 21 other end is connected in the second, and the extension of the second interior arc line 22 other end is connected cantilever body 81.
The first inner arc line 21 and the second inner arc line 22 have the same normal direction, and form an arc line.
First outer arc line 11 one end extends and connects first fixed part 6, and the first outer arc line 11 other end extends and connects the 12 one ends of the outer arc line of second, and the 12 other ends of the outer arc line of second extend and connect cantilever body 81.
The joint of the second outer arc line 12 and the first outer arc line 11 is in tangent transition, and the tangent angle a of the joint of the second outer arc line 12 and the first outer arc line 11 is 120 degrees.
The curvature radius of the first outer arc line 11 and the second outer arc line 12 is continuously and slowly changed, the first outer arc line 11 and the second outer arc line 12 are not bent obviously, and the curvature radius of the first outer arc line 11 is larger than that of the second outer arc line 12 in general.
The second inner arc line 22 has the same radius of curvature as the second outer arc line 12, preventing the root from being severely deformed, so that stress can be uniformly transmitted.
The curvature radius of the first inner arc line 21 is smaller than that of the first outer arc line 11, so that the phenomenon that the root part cut-off part deforms too much to influence the uniform transmission of stress is avoided.
The distance between the first inner arc line 21 and the first outer arc line 11 gradually narrows along the direction that the root end extends to the root starting position, and the connection between the first outer arc line 11 and the second outer arc line 12 is stable, namely, the connection between the first connecting section 1 and the second connecting section 2 is in smooth transition, the width of the end of the root is properly increased, and the root can be prevented from being deformed too much.
The first connecting section 1 enlarges the deformation bearing area of the root, and the second connecting section 2 slows down the deformation concentration phenomenon of the first connecting section 1.
The first connecting section 1 is a torsional deformation region, the second connecting section 2 is a bending-torsional deformation transition region, namely a variable cross section and curve transition form is adopted between the first root part 82 and the cantilever body 81, the simple bending transition of the first root part 82 and the cantilever body 81 is changed into a bending-torsional combined deformation form, the maximum stress value and the stress concentration degree are reduced, the large stress distribution area is reduced, the anti-fatigue capability of the large stress distribution area is improved, and the structural rigidity is reduced by adopting single-sided copper.
The stress bearing range of the optimized centering support sheet is 5.12-69.07 Mpa, the maximum stress of the optimized centering support sheet is 69.07Mpa, the maximum stress of the optimized centering support sheet copper layer can be reduced to 74% before optimization, the maximum stress value and the stress concentration degree of the optimized centering support sheet are reduced, and the anti-fatigue capability is remarkably improved.
Example 5
The same contents as those in embodiment 4 have already been discussed in detail in embodiment 4, and are not described herein again, and the embodiment is modified as follows with respect to embodiment 4:
the joint of the second outer arc line 12 and the first outer arc line 11 is in tangential transition, and the tangent angle a of the joint of the second outer arc line 12 and the first outer arc line 11 is 110 degrees.
The stress bearing range of the optimized centering support sheet is 5.54-69.82 Mpa, the maximum stress of the optimized centering support sheet is 69.82Mpa, the maximum stress of the optimized centering support sheet copper layer can be reduced to 75% of that before optimization, the maximum stress value and the stress concentration degree of the optimized centering support sheet are reduced, and the anti-fatigue capability is remarkably improved.
Example 6
The same contents as those in embodiment 4 have already been discussed in detail in embodiment 4, and are not described herein again, and the embodiment is modified as follows with respect to embodiment 4:
the joint of the second outer arc line 12 and the first outer arc line 11 is in tangential transition, and the tangent angle a of the joint of the second outer arc line 12 and the first outer arc line 11 is 130 degrees.
The stress bearing range of the optimized centering support sheet is 6.04-71.23 Mpa, the maximum stress of the optimized centering support sheet is 71.23Mpa, the maximum stress of the optimized centering support sheet copper layer can be reduced to 77% of that before optimization, the maximum stress value and the stress concentration degree of the optimized centering support sheet are reduced, and the anti-fatigue capability is obviously improved.
Example 7
The same contents as those in embodiment 1 have already been discussed in detail in embodiment 1, and are not described herein again, and the present embodiment is modified as follows with respect to embodiment 1:
as shown in fig. 10, the cross section of the second root 83 is composed of two connecting sections, namely a fourth connecting section 4 and a fifth connecting section 5, two ends of the fifth connecting section 5 are respectively connected with one end of the fourth connecting section 4 and the cantilever body 81, and the other end of the fourth connecting section 4 is connected with the first fixing portion 6.
The linkage segment includes relative inner arc line and the outer arc line that sets up, and inner arc line is located one side that first root 82 is close to first fixed part 6, and outer arc line is located one side that first root 82 keeps away from first fixed part 6.
The joint of the fifth connecting section 5 and the cantilever body 81 is the root starting position of the second root 83, and the joint of the fourth connecting section 4 and the first fixing part 6 is the root ending position of the second root 83.
One side of the first root 82 close to the first fixing portion 6 is the inner side direction of the root, and the other side of the first root 82 far from the first fixing portion 6 is the outer side direction of the root.
The curvature radius of the fourth outer arc line 41 is smaller than that of the fourth inner arc line 51, so that the phenomenon that the root part cut-off part deforms too much to influence the uniform transmission of stress is avoided.
The fifth connecting section 5 is in a sector ring shape, the curvature radius of the sector ring shape of the fifth connecting section 5 is larger than that of the sector ring shape of the fourth connecting section 4, the curvature radius of the inner arc line of the fourth connecting section 4 is larger than that of the sector ring shape of the fifth connecting section 5, so that the phenomenon that the deformation of the root part at the cut-off position is too large can be avoided, the stress is uniformly transmitted, and the anti-fatigue capability of the stress is improved.
The normal direction of the arc line refers to the direction of the normal line and is perpendicular to the tangential direction of the arc line.
The curvature radius is the reciprocal of the curvature, and the curvature of the plane curve is the rotation rate of the tangent direction angle of a certain point on the curve to the arc length, and is defined by differentiation, and indicates the degree of deviation of the curve from a straight line.
One end of the fourth outer arc line 41 is connected to the second fixing portion 7 in an extending manner, the other end of the fourth outer arc line 41 is connected to one end of the fifth outer arc line 42 in an extending manner, and the other end of the fifth outer arc line 42 is connected to the cantilever body 81 in an extending manner.
The fourth outer arc line 41 and the fifth outer arc line 42 have the same normal direction, and form an arc line.
The second fixed part 7 is connected in the extension of arc line 51 one end in the fourth, and the arc line 52 one end in the fifth is connected in the extension of the arc line 51 other end in the fourth, and the cantilever body 81 is connected in the extension of the arc line 52 other end in the fifth.
The junction of the fifth inner arc line 52 and the fourth inner arc line 51 is in tangential transition, and the tangent angle d of the junction of the fifth inner arc line 52 and the fourth inner arc line 51 is 120 degrees.
The curvature radius of the fourth inner arc line 51 and the fifth inner arc line 52 is continuously and slowly changed, the fourth inner arc line 51 and the fifth inner arc line 52 are not bent obviously, and the curvature radius of the fourth inner arc line 51 is larger than that of the fifth inner arc line 52 in general.
The fifth outer arc line 42 has the same radius of curvature as the fifth inner arc line 52, preventing the root from being severely deformed, so that stress can be uniformly transferred.
The distance between the fourth outer arc line 41 and the fourth inner arc line 51 gradually narrows along the direction from the root ending part to the root starting part, until the connection between the fourth inner arc line 51 and the fifth inner arc line 52 is stable, namely, the connection between the fourth connecting section 4 and the fifth connecting section 5 is in smooth transition, the width of the ending part of the root is properly increased, and the root can be prevented from being deformed too much.
The fourth connecting section 4 enlarges the deformation bearing area of the root part, and the fifth connecting section 5 slows down the deformation concentration phenomenon of the fourth connecting section 4.
The fourth connecting section 4 is a torsional deformation region, the fifth connecting section 5 is a bending-torsional deformation transition region, namely, a variable cross section and curve transition form is adopted between the second root part 83 and the cantilever body 81, the simple bending transition of the second root part 83 and the cantilever body 81 is changed into a bending-torsional combined deformation form, the maximum stress value and the stress concentration degree are reduced, the large stress distribution area is reduced, the anti-fatigue capability of the cantilever is improved, and the structural rigidity is reduced by adopting single-sided copper.
The stress bearing range of the optimized centering support sheet is 4.97-67.81 Mpa, the maximum stress of the optimized centering support sheet is 67.81Mpa, the maximum stress of the optimized centering support sheet copper layer can be reduced to 73% before optimization, the maximum stress value and the stress concentration degree of the optimized centering support sheet are reduced, and the anti-fatigue capability is remarkably improved.
Example 8
The same contents as those in embodiment 7 have already been discussed in detail in embodiment 7, and are not described herein again, and this embodiment is modified as follows with respect to embodiment 7:
the junction of the fourth inner arc line 51 and the fifth inner arc line 52 is in tangential transition, and the tangent angle d of the junction of the fourth inner arc line 51 and the fifth inner arc line 52 is 110 degrees.
The stress bearing range of the optimized centering support sheet is 5.12-69.33 Mpa, the maximum stress of the optimized centering support sheet is 69.33Mpa, the maximum stress of the copper layer of the optimized centering support sheet can be reduced to 75% of that before optimization, the maximum stress value and the stress concentration degree of the optimized centering support sheet are reduced, and the anti-fatigue capability is obviously improved.
Example 9
The same contents as those in embodiment 7 have already been discussed in detail in embodiment 7, and are not described herein again, and this embodiment is modified as follows with respect to embodiment 7:
the junction of the fourth inner arc line 51 and the fifth inner arc line 52 is in tangential transition, and the tangent angle d of the junction of the fourth inner arc line 51 and the fifth inner arc line 52 is 130 degrees.
The stress bearing range of the optimized centering support sheet is 5.25-70.32 Mpa, the maximum stress of the optimized centering support sheet is 70.32Mpa, the maximum stress of the optimized centering support sheet copper layer can be reduced to 76% of that before optimization, the maximum stress value and the stress concentration degree of the optimized centering support sheet are reduced, and the anti-fatigue capability is remarkably improved.
The description of the present invention has been presented for purposes of illustration and description, and is not intended to be exhaustive or limited to the invention in the form disclosed. Many modifications and variations will be apparent to practitioners skilled in this art. The embodiment was chosen and described in order to best explain the principles of the invention and the practical application, and to enable others of ordinary skill in the art to understand the invention for various embodiments with various modifications as are suited to the particular use contemplated.
Claims (16)
1. The utility model provides a centering support piece, includes fixed part and connection cantilever (8), the fixed part includes first fixed part (6) and second fixed part (7), and first fixed part (6) are connected through connecting cantilever (8) with second fixed part (7), and connection cantilever (8) include root and cantilever body (81), and the root is located the both ends of cantilever body (81), including first root (82) and second root (83), and cantilever body (81) are connected with first fixed part through first root (82), and cantilever body (81) are connected with the second fixed part through second root (82), its characterized in that: the cross-section of root includes two at least linkage segments, every the linkage segment includes two relative inner arc line and outer arc line that set up, is close to and connects the normal direction of the inner arc line and the outer arc line of the linkage segment of fixed part sets up in opposite directions.
2. A centring disk as claimed in claim 1, wherein: the distance between the inner arc line and the outer arc line of the connecting section close to and connected with the fixing part is gradually narrowed along the direction extending from the ending part of the root part to the starting part of the root part.
3. A centring disk as claimed in claim 1, wherein: the cross section of the second root (83) comprises two connecting sections which are a fourth connecting section (4) and a fifth connecting section (5), two ends of the fifth connecting section (5) are connected with the cantilever body (81) and one end of the fourth connecting section (4) respectively, and the other end of the fourth connecting section (4) is close to and connected with the second fixing part (7);
the curvature radius of the outer arc line of the fourth connecting section (4) is smaller than that of the inner arc line thereof.
4. A centring disk as claimed in claim 3, wherein: the inner arc line of the fifth connecting section (5) is connected with the inner arc line of the fourth connecting section (4), and the normal directions of the inner arc line and the inner arc line are opposite to each other, and the connection part of the inner arc line and the inner arc line is in tangential transition;
the outer arc line of the fifth connecting section (5) is connected with the outer arc line of the fourth connecting section (4) and the normal direction is unchanged.
5. A centring disk as claimed in claim 4, wherein: the tangent angle of the joint of the inner arc line of the fifth connecting section (5) and the inner arc line of the fourth connecting section (4) is 110-130 degrees.
6. A centring disk as claimed in claim 3, wherein: the fifth connecting section (5) is in a sector ring shape, and the radius of curvature of the sector ring shape of the fifth connecting section (5) is smaller than that of the inner arc line of the fourth connecting section (4).
7. A centring disk as claimed in claim 1, wherein: the cross section of the first root (82) comprises a first connecting section (1), the first connecting section (1) is close to and connected with the first fixing part (6);
the radius of curvature of the outer arc line of the first connecting section (1) is larger than that of the inner arc line thereof.
8. A centring disk as claimed in claim 7, wherein: the cross section of the first root (82) further comprises a second connecting section (2), and two ends of the second connecting section (2) are respectively connected with the first connecting section (1) and the cantilever body (81);
the inner arc line of the second connecting section (2) is connected with the inner arc line of the first connecting section (1) and the normal direction is unchanged;
the outer arc line of the second connecting section (2) is connected with the outer arc line of the first connecting section (1), and the normal directions of the two are opposite and the connecting position of the two is in tangent transition.
9. A centring disk as claimed in claim 8, wherein: the cutting angle of the joint of the outer arc line of the second connecting section (2) and the outer arc line of the first connecting section (1) is 110-130 degrees.
10. A centring disk as claimed in claim 8, wherein: the second connecting section (2) is in a sector ring shape, and the curvature radius of the sector ring shape of the second connecting section (2) is smaller than that of the outer arc line of the first connecting section (1).
11. A centring disk as claimed in claim 9, wherein: the cross-section of first root (82) still includes third linkage segment (3), and first linkage segment (1) one end and third linkage segment (3) one end are connected respectively to the both ends of second linkage segment (2), and cantilever body (81) are connected to the other end of third linkage segment (3), and first fixed part (6) are connected to the other end of first linkage segment (1).
12. A centring disk as claimed in claim 11, wherein: the second connecting section (2) and the third connecting section (3) are in a fan-shaped ring shape, and the normal direction of the second connecting section (2) is opposite to the normal direction of the third connecting section (3).
13. A centring disk as claimed in claim 11, wherein: the inner arc line of the second connecting section (2) is connected with the inner arc line of the third connecting section (3), and the normal directions of the two are opposite and the connecting part is in tangential transition;
the outer arc line of the second connecting section (2) is connected with the outer arc line of the third connecting section (3), and the normal directions of the two are opposite to each other, and the connecting part of the two is in tangent transition.
14. A centring disk as claimed in claim 13, wherein: the tangent angle of the joint of the inner arc line of the second connecting section (2) and the inner arc line of the third connecting section (3) is 10-20 degrees;
the cutting angle of the joint of the outer arc line of the second connecting section (2) and the outer arc line of the third connecting section (3) is 10-20 degrees.
15. A centring disk as claimed in claim 12, wherein: the radius of curvature of the sector ring shape of the third connecting section (3) is larger than that of the sector ring shape of the second connecting section (2), and the radius of curvature of the outer arc line of the first connecting section (1) is larger than that of the sector ring shape of the third connecting section (3).
16. A loudspeaker, characterized by: the loudspeaker comprises an auxiliary system, a magnetic circuit system and a vibration system, wherein the magnetic circuit system and the vibration system are accommodated and fixed in an accommodating cavity formed by the auxiliary system, the vibration system comprises a vibrating diaphragm, a centering disk and a voice coil which are combined together, the centering disk is the centering disk of any one of claims 1-15, a first fixing part (6) of the centering disk is fixedly connected with the auxiliary system of the loudspeaker, and a second fixing part (7) of the centering disk is connected with the voice coil.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010226422.6A CN111131982B (en) | 2020-03-27 | 2020-03-27 | Centering support piece and loudspeaker with same |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010226422.6A CN111131982B (en) | 2020-03-27 | 2020-03-27 | Centering support piece and loudspeaker with same |
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| CN111131982A true CN111131982A (en) | 2020-05-08 |
| CN111131982B CN111131982B (en) | 2020-08-11 |
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| CN111131982B (en) | 2020-08-11 |
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