Vibrating assembly and sound emitting device

Abstract

The application discloses a vibration assembly and a sound production device. The vibration assembly is applied to the sound production device. The vibration assembly comprises a voice coil, a conductive connecting piece and a conductive supporting sheet. The voice coil is formed with a hollow structure. The voice coil has an outer surface on a side away from the hollow structure. The conductive connecting piece is arranged on the outer surface. The conductive supporting sheet is a plane supporting sheet and is used for transmitting an electric signal to the voice coil. The conductive supporting sheet comprises a fixed part and an elastic arm which are connected with each other. The fixed part is connected with the voice coil through the conductive connecting piece. The elastic arm is arranged in a circumferential direction of the voice coil. The vibration assembly can effectively improve the acoustic performance of the sound production device and prolong the service life.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electro-acoustic conversion, in particular to a vibration assembly and a sound production device applying the vibration assembly. BACKGROUND

[0002] A loudspeaker is a basic sound production unit for converting an electric signal into an acoustic signal. A centering spider is a component for adjusting the vibration direction of a diaphragm, which suppresses the deflection of the diaphragm through mechanical restoring force. The performance of the centering spider has a great influence on the acoustic performance and service life of the loudspeaker.

[0003] In the related art, the centering spider is annular, and the annular centering spider is arranged in a wave structure along the radial direction. The centering spider is usually made of materials such as conex, blended fabric, and cloth, and the Kms thereof is difficult to be made very small due to the types of the above-mentioned materials. In the loudspeaker, since the Kms and the Cms are inversely related to each other, when the vibration amplitude is large, the compliance Cms of the centering spider is poor. This makes the resonance frequency F0 of the loudspeaker large. Since the F0 is an important factor affecting the acoustic performance of the loudspeaker, a larger F0 will result in poor bass sensitivity of the loudspeaker product. At the same time, the loudspeaker applying the traditional centering spider has a high total harmonic distortion THD. This reduces the acoustic performance of the loudspeaker and greatly affects the user's experience.

[0004] At the same time, the lead wire of the voice coil is guided to the external bonding pad from above the centering spider through a silk wire, and the centering spider needs to set a wire path for the silk wire during the processing process, resulting in complicated processing steps of the existing loudspeaker. SUMMARY

[0005] The main purpose of the present application is to provide a vibration assembly and a sound production device, which aims to improve the acoustic performance of the existing sound production device and prolong the service life.

[0006] To achieve the above-mentioned purpose, the present application provides a vibration assembly applied to a sound production device, which comprises:

[0007] a voice coil, the voice coil is formed with a hollow structure, and the voice coil has an outer surface on the side away from the hollow structure;

[0008] a conductive connecting piece, the conductive connecting piece is arranged on the outer surface; and

[0009] a conductive spider, the conductive spider is a planar spider for transmitting an electric signal to the voice coil, the conductive spider comprises a fixed part and a spring arm connected with each other, the fixed part is connected with the voice coil through the conductive connecting piece, and the spring arm is arranged along the circumferential direction of the voice coil.

[0010] In an embodiment, the plurality of conductive connecting pieces are arranged on the outer surface of the voice coil in a circumferential direction of the voice coil.

[0011] The plurality of conductive connecting pieces are connected to the fixing portion of each of the plurality of conductive supporting pieces.

[0012] In an embodiment, the plurality of elastic arms of the plurality of conductive supporting pieces are arranged in the same direction in the circumferential direction of the voice coil.

[0013] In an embodiment, the voice coil is arranged in a cylindrical shape.

[0014] The plurality of conductive connecting pieces and the plurality of conductive supporting pieces are each four in number, the plurality of conductive connecting pieces are arranged in a circumferential direction of the voice coil in a spaced and uniform manner, so that the angle between the line connecting the two adjacent conductive connecting pieces and the center of the voice coil is 90°; and / or, the diameter of the voice coil is 14mm-28mm.

[0015] In an embodiment, the elastic arm comprises a first arc segment, a second arc segment and a third arc segment connected in sequence, the first arc segment is connected to the fixing portion, the second arc segment extends in the circumferential direction of the voice coil from the first arc segment to the third arc segment, so that the third arc segment corresponds to and is spaced from the fixing portion of another conductive supporting piece.

[0016] In an embodiment, the centers of curvature of the first arc segment and the second arc segment are located on opposite sides of the center of curvature of the third arc segment.

[0017] And / or, the angle of the first arc segment is greater than 90°, and the angle of the second arc segment is less than 90°.

[0018] And / or, the minimum gap distance between the third arc segment and the fixing portion of the adjacent conductive supporting piece is greater than 1mm.

[0019] And / or, the conductive supporting piece further comprises a welding portion, the welding portion is connected to one end of the third arc segment away from the second arc segment.

[0020] In an embodiment, the width of the first arc segment gradually decreases from the fixing portion to the second arc segment, the width of the second arc segment gradually decreases from the first arc segment to the third arc segment, and the width of the third arc segment gradually increases from the second arc segment to the end away from the second arc segment.

[0021] or, the width of the first arc-shaped section is consistent from the fixed part to the second arc-shaped section, the width of the second arc-shaped section gradually decreases from the first arc-shaped section to the third arc-shaped section, and the width of the third arc-shaped section gradually increases from the second arc-shaped section to the third arc-shaped section away from the second arc-shaped section;

[0022] or, the width of the first arc-shaped section is consistent from the fixed part to the second arc-shaped section, the width of the second arc-shaped section gradually decreases from the first arc-shaped section to the third arc-shaped section, and the width of the third arc-shaped section gradually increases from the second arc-shaped section to the third arc-shaped section away from the second arc-shaped section;

[0023] or, the width of the first arc-shaped section, the width of the second arc-shaped section, and the width of the third arc-shaped section are the same.

[0024] In an embodiment, the width of the fixed part is 1mm-3mm;

[0025] and / or, the width of the elastic arm is 1mm-3mm;

[0026] and / or, the thickness of the conductive support sheet is 0.3mm-1mm.

[0027] In an embodiment, the conductive support sheet comprises:

[0028] an FPCB layer having a first surface and a second surface facing away from each other; and

[0029] a reinforcing layer adhered to the first surface and / or the second surface by an adhesive layer.

[0030] In an embodiment, the adhesive layer is a thermosetting adhesive or an acrylic adhesive;

[0031] and / or, the material of the reinforcing layer is at least one of PI, PEN, PET, and PEI;

[0032] and / or, the thickness of the reinforcing layer is 0.1mm-0.5mm;

[0033] and / or, the thickness of the adhesive layer is 0.015mm-0.1mm.

[0034] In an embodiment, the FPCB layer comprises a substrate layer, a copper layer, and a film layer stacked in sequence, the first surface is formed on the side of the substrate layer away from the copper layer, and the second surface is formed on the side of the film layer away from the copper layer;

[0035] Or, the FPCB layer comprises a substrate layer, two copper layers and two film layers, the substrate layer is sandwiched between the two copper layers, each film layer is arranged on one side of each copper layer away from the substrate layer, and one side of the film layer away from the copper layer forms the first surface or the second surface.

[0036] In an embodiment, the conductive connecting piece comprises a first connecting part and a second connecting part arranged at an angle, the first connecting part is connected with the outer side surface, and the second connecting part is connected with the fixed part.

[0037] In an embodiment, the first connecting part and the second connecting part are arranged vertically.

[0038] And / or, the width of the second connecting part is greater than the width of the first connecting part.

[0039] And / or, the width of the first connecting part gradually decreases from one end adjacent to the second connecting part to one end away from the second connecting part.

[0040] And / or, the width of the second connecting part is the same as the width of the fixed part.

[0041] And / or, the outer side surface is provided with a pad corresponding to the conductive connecting piece, and the first connecting part is welded to the pad.

[0042] And / or, the conductive connecting piece is a metal sheet.

[0043] And / or, the thickness of the conductive connecting piece is 0.1mm-0.5mm.

[0044] In an embodiment, one end of the second connecting part away from the first connecting part is bent towards the direction away from the first connecting part to form a bracket, and the bracket is supported at one end of the elastic arm adjacent to the fixed part.

[0045] Or, one end of the second connecting part away from the first connecting part is bent towards one side of the fixed part to form a flange, and the flange and the second connecting part enclose a mounting groove, and the fixed part is accommodated and limited in the mounting groove.

[0046] Or, one end of the second connecting part away from the first connecting part is provided with a welding hole for welding the second connecting part to the fixed part.

[0047] The application further provides a sound generating device, which comprises:

[0048] A basin frame having a cavity, the basin frame being provided with a conductive terminal.

[0049] A magnetic circuit system is connected to one end of the yoke, and is provided with a magnetic gap.

[0050] The vibration assembly is connected to the other end of the yoke and is opposite and spaced from the magnetic circuit system, the voice coil of the vibration assembly is suspended in the magnetic gap, and the conductive branch of the vibration assembly is connected to the conductive terminal at the end away from the voice coil.

[0051] The vibration displacement of the voice coil is 1mm-15mm.

[0052] In an embodiment, the yoke is cylindrically arranged, and the diameter of the yoke is 40mm-75mm.

[0053] The vibration assembly of the technical scheme is applied to a sound generating device. The conductive connecting piece is arranged on the outer surface of the voice coil in the vibration assembly, the conductive branch is arranged as a planar branch, the fixed part of the conductive branch is connected to the voice coil through the conductive connecting piece, and the elastic arm is arranged along the circumference of the voice coil and is used to be connected to the external pad. Thus, the conductive branch and the conductive connecting piece are used to realize the conductive connection with the voice coil, so as to transmit the electric signal to the voice coil. Meanwhile, the planar branch can realize the centering of the voice coil and the transmission of the electric signal to the voice coil. The arrangement of the planar branch cancels the traditional elastic wave type centering branch and the connection mode of the silk thread and the voice coil, effectively simplifies the processing steps of the sound generating device, reduces the production cost, and the planar branch can obtain a smaller Kms. Compared with the prior art, the F0 of the sound generating device is made lower, so that good acoustic performance can be obtained, and the service life of the sound generating device can be effectively prolonged. BRIEF DESCRIPTION OF DRAWINGS

[0054] In order to more clearly illustrate the technical scheme in the embodiments of the present application or the prior art, the drawings needed in the following embodiment or prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0055] Figure 1 It is a structure schematic view of the vibration assembly in an embodiment of the present application.

[0056] Figure 2 It is a top view structure schematic view of the vibration assembly in an embodiment of the present application.

[0057] Figure 3 It is a partial cross-sectional view of the vibration assembly in an embodiment of the present application.

[0058] Figure 4A structural schematic diagram of the conductive connecting piece in an embodiment of the present application;

[0059] Figure 5 A structural schematic diagram of the conductive branch in an embodiment of the present application;

[0060] Figure 6 An exploded schematic diagram of the conductive branch in an embodiment of the present application;

[0061] Figure 7 An exploded schematic diagram of the conductive branch in another embodiment of the present application;

[0062] Figure 8 A cross-sectional schematic diagram of the FPCB layer in an embodiment of the present application;

[0063] Figure 9 A cross-sectional schematic diagram of the FPCB layer in another embodiment of the present application;

[0064] Figure 10 A structural schematic diagram of the sound generating device in an embodiment of the present application;

[0065] Figure 11 A cross-sectional schematic diagram of the sound generating device in an embodiment of the present application.

[0066] Brief Description of the Drawings:

[0067]

[0068]

[0069] The implementation, functional features and advantages of the present application will be further described with reference to the embodiments and the accompanying drawings. DETAILED DESCRIPTION

[0070] The technical solutions in the embodiments of the present application will be clearly and completely described with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without any creative work under the premise that the present application falls within the protection scope of the present application.

[0071] It should be noted that all the directionality indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present application are only used to explain the relative position relationship, movement condition, etc. between the components in a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directionality indications also change accordingly.

[0072] Meanwhile, "and / or" or "and / or" appearing in the whole text means that it includes three schemes, for example, "A and / or B" includes A scheme, or B scheme, or A and B are satisfied at the same time.

[0073] In addition, the description such as "first", "second" and the like in the present application is only for the purpose of description, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first", "second" can be explicitly or implicitly included at least one of the features. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the realization of the ordinary skilled in the art, when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, nor within the protection scope required by the present application.

[0074] The loudspeaker is a basic sound unit for converting electrical signals into acoustic signals. The centering support is a component for adjusting the vibration direction of the diaphragm, which suppresses the polarization of the diaphragm through mechanical restoring force. The performance of the centering support has a great influence on the acoustic performance and service life of the loudspeaker.

[0075] In the related art, the centering support is annular, and the annular centering support is arranged in a wave structure along the radial direction. The centering support is usually made of materials such as conex, blended fabric, cloth, etc. Due to the limitation of the above-mentioned material types, it is difficult to make the Kms very small. In the loudspeaker, since the Kms and the Cms are inversely proportional to each other, when the vibration amplitude is large, it will cause the compliance Cms of the centering support to be poor. This makes the resonance frequency F0 of the loudspeaker larger. Since F0 is an important factor affecting the acoustic performance of the loudspeaker, a larger F0 will cause the bass sensitivity of the loudspeaker product to be poor. At the same time, the loudspeaker using the traditional centering support has a high total harmonic distortion THD. This reduces the acoustic performance of the loudspeaker and greatly affects the user's experience.

[0076] In addition, since the material of the centering support is usually chemical fiber, blended fabric, etc., in a high temperature and humid environment, the hardness of the centering support increases. This causes the centering support to be prone to deformation or even rupture, and the fatigue performance of the centering support is reduced. The failure of the centering support will directly cause the failure of the loudspeaker, significantly shortening the service life of the loudspeaker.

[0077] At the same time, the voice coil lead of the loudspeaker is guided to the external pad from above the centering support through the silk wire, and the centering support needs to set a wire path for the silk wire during the processing process, which causes the processing steps of the existing loudspeaker to be complicated.

[0078] Based on the above ideas and problems, the present application provides a vibration assembly 100. It can be understood that the vibration assembly 100 is applied to a sound generating device 600, and the sound generating device 600 can be applied to terminal equipment such as a sound box, a television, a car, etc.

[0079] Please refer to the reference. Figures 1 to 7 As shown, in this embodiment of the invention, the vibration assembly 100 includes a voice coil 1, a conductive connector 2, and a conductive support 3. The voice coil 1 has a hollow structure 11 and an outer surface 12 facing away from the hollow structure 11. The conductive connector 2 is disposed on the outer surface 12. The conductive support 3 is a planar support for transmitting electrical signals to the voice coil 1. The conductive support 3 includes a fixed part 31 and a spring arm 32 connected to each other. The fixed part 31 is connected to the voice coil 1 through the conductive connector 2, and the spring arm 32 extends circumferentially along the voice coil 1.

[0080] Understandably, the voice coil 1 of the vibration assembly 100 is configured to transmit electrical signals. The voice coil 1 is a structure formed by winding a voice coil wire around a frame. In this embodiment, the voice coil 1 includes a frame and a voice coil wire disposed on the frame. The voice coil wire can be made of a metal material capable of transmitting current. Optionally, the frame of the voice coil 1 can be a circular cylinder, a square cylinder, a racetrack shape, or other cylindrical shapes, and is not limited here.

[0081] In this embodiment, the voice coil 1 may be cylindrical. The voice coil 1 has a hollow structure 11, which may be a hollow cavity, that is, the hollow structure 11 has openings at both ends, and these openings communicate with the hollow cavity. The voice coil 1 has an outer surface 12 facing away from the hollow structure 11 and an inner surface facing the hollow structure 11. The voice coil 1 also has ends located at both ends.

[0082] To facilitate the connection between the voice coil 1 and the planar conductive support 3, and to improve connection stability and conductivity, a conductive connector 2 is provided on the outer surface 12 of the voice coil 1 in this embodiment. It is understood that the conductive connector 2 can be integrally formed on the outer surface 12 of the voice coil 1, thus improving the connection stability and conductivity between the voice coil 1 and the conductive connector 2. Of course, the conductive connector 2 and the voice coil 1 can also be separate components, with the conductive connector 2 fixed to the outer surface 12 of the voice coil 1 by means of fasteners or connectors; this is not limited here.

[0083] Optionally, the outer surface 12 of the voice coil 1 is provided with a pad 13 corresponding to the conductive connector 2. The conductive connector 2 is fixedly connected to the pad 13, for example by welding, which is not limited here.

[0084] In this embodiment, by setting the conductive support 3 as a planar support, it is convenient to process and simplify the processing steps. On the other hand, the conductive support 3 can not only center the voice coil 1, thereby effectively suppressing the polarization of the diaphragm, but also facilitate the voice coil 1 to achieve conductive connection with the external circuit through the conductive support 3.

[0085] And the traditional elastic wave centering support sheet, that is, the elastic wave centering support sheet is a ring structure, is sleeved on the circumference of the voice coil, and the elastic wave centering support sheet is arranged in a wave shape in the radial direction, which not only has a complicated processing procedure, but also cannot realize electric connection with the voice coil, and needs to additionally set a silk thread to be connected with the lead wire of the voice coil, so that the silk thread is used to conduct the voice coil and the external circuit. At the same time, the silk thread is located above the elastic wave centering support sheet, and a wire arrangement structure for facilitating the wire arrangement of the silk thread needs to be arranged above the elastic wave centering support sheet, and a wire arrangement space needs to be reserved for the silk thread, so that the processing procedure of the centering support sheet is further complicated, and the structure of the sound generating device is more complicated.

[0086] Compared with the traditional elastic wave centering support sheet and the silk thread structure, the planar conductive support sheet 3 of the present application effectively simplifies the structure and the processing procedure, saves the cost, and can obtain a smaller Kms, compared with the prior art, the F0 of the sound generating device 600 is made lower, so that good acoustic performance can be obtained, and the service life of the sound generating device 600 can be effectively prolonged. At the same time, the sound generating device 600 of the present application does not need to reserve a wire arrangement space for the traditional silk thread, and the thickness of the sound generating device 600 can be reduced, which is beneficial to the thinning design of the sound generating device 600.

[0087] In the present embodiment, by setting the conductive support sheet 3 as the fixed part 31 and the elastic arm 32 connected with each other, the fixed part 31 of the conductive support sheet 3 is connected with the voice coil 1 through the conductive connecting piece 2, and the connection stability of the conductive support sheet 3 and the conductive connecting piece 2 is improved; at the same time, the elastic arm 32 is arranged to extend along the circumference of the voice coil 1, so that not only the deformation ability of the conductive support sheet 3 is improved, and the breakage of the conductive support sheet 3 is effectively avoided, but also the stress concentration problem of the conductive support sheet 3 at the fixed part 31 is dispersed.

[0088] The vibration assembly 100 of the present application is applied to the sound generating device 600, the conductive connecting piece 2 is arranged on the outer side surface 12 of the voice coil 1 in the vibration assembly 100, and the conductive support sheet 3 is set as a planar support sheet, so that the fixed part 31 of the conductive support sheet 3 is connected with the voice coil 1 through the conductive connecting piece 2, and the elastic arm 32 is arranged to extend along the circumference of the voice coil 1 and is used to be connected with the external pad, so that the conductive support sheet 3 and the conductive connecting piece 2 are used to realize electric connection with the voice coil 1, and the electric signal is transmitted to the voice coil 1; at the same time, the planar support sheet can realize centering of the voice coil 1 and transmission of the electric signal to the voice coil 1, the setting of the planar support sheet not only cancels the connection mode of the traditional elastic wave type centering support sheet and the silk thread with the voice coil, but also effectively simplifies the processing procedure of the sound generating device 600, reduces the production cost, and the planar support sheet can obtain a smaller Kms, compared with the prior art, the F0 of the sound generating device 600 is made lower, so that good acoustic performance can be obtained, and the service life of the sound generating device 600 can be effectively prolonged.

[0089] In an embodiment, the plurality of conductive connecting pieces 2 are arranged on the outer surface 12 of the voice coil 1 in a circumferential direction of the voice coil 1.

[0090] In the embodiment, as shown in Figure 1 and Figure 2 , the plurality of conductive connecting pieces 2 are arranged on the outer surface 12 of the voice coil 1 in a circumferential direction of the voice coil 1, and the fixing portion 31 of each conductive supporting piece 3 is connected to one of the conductive connecting pieces 2. In this way, the plurality of conductive supporting pieces 3 can be connected to the voice coil 1, and the plurality of conductive supporting pieces 3 can also be used to improve the centering effect of the voice coil 1, thereby effectively avoiding the deflection of the voice coil 1 during the vibration of the diaphragm.

[0091] Optionally, as shown in Figure 1 and Figure 2 , the plurality of elastic arms 32 of the plurality of conductive supporting pieces 3 extend in the same direction in the circumferential direction of the voice coil 1. It can be understood that in this way, the balance effect of the voice coil 1 is improved, and interference of the elastic arms 32 with other conductive supporting pieces 3 is also avoided.

[0092] In an embodiment, the voice coil 1 is in a cylindrical shape, and the conductive connecting pieces 2 and the conductive supporting pieces 3 each include four pieces. The four conductive connecting pieces 2 are arranged in a circumferential direction of the voice coil 1 in a spaced and uniform manner, so that the angle between the line connecting the adjacent two conductive connecting pieces 2 and the center of the voice coil 1 is 90°.

[0093] It can be understood that the four fixing portions 31 of the four conductive supporting pieces 3 are respectively connected to the four conductive connecting pieces 2, and the four elastic arms 32 of the four conductive supporting pieces 3 are arranged in a circumferential direction of the voice coil 1. In the embodiment, the elastic arms 32 are optionally arranged in an arc shape, and the arc bending direction of the elastic arms 32 is consistent with the arc bending direction of the outer surface 12 of the voice coil 1.

[0094] In the embodiment, the voice coil 1 is in a cylindrical shape, and the diameter of the voice coil 1 is optionally 14mm-28mm. It should be noted that when the sound generating device 600 is a large loudspeaker structure, the voice coil 1 is in a cylindrical structure, and the diameter of the voice coil 1 is relatively large. Optionally, the diameter of the voice coil 1 is 14mm, 16mm, 18mm, 20mm, 22mm, 25mm, 28mm, etc., which is not limited herein.

[0095] In an embodiment, the elastic arm 32 comprises a first arc segment 321, a second arc segment 322 and a third arc segment 323 connected in sequence, the first arc segment 321 is connected with the fixed part 31, the second arc segment 322 extends along the circumferential direction of the voice coil 1 from the first arc segment 321 to the third arc segment 323, so that the third arc segment 323 corresponds to and is spaced from the fixed part 31 of the other conductive branch 3.

[0096] In the embodiment, as shown in Figures 1 to 3 , Figures 5 to 7 the first arc segment 321, the second arc segment 322 and the third arc segment 323 of the elastic arm 32 are integrally formed. The first arc segment 321 of the elastic arm 32 is connected with the fixed part 31, for guiding the elastic arm 32 from the fixed part 31 to the outer side surface 12 of the voice coil 1. That is, the first arc segment 321 is guided from the fixed part 31 perpendicular to the outer side surface 12 of the voice coil 1 to be away from the outer side surface 12 and to be close to parallel with the outer side surface 12, and the first arc segment 321 is curved towards the second arc segment 322.

[0097] It can be understood that the extending direction of the second arc segment 322 is close to consistent with the circumferential direction of the outer side surface 12 of the voice coil 1. Optionally, the third arc segment 323 of one elastic arm 32 corresponds to and is spaced from the fixed part 31 and the first arc segment 321 of the other conductive branch 3. That is, the elastic arm 32 of one conductive branch 3 extends from the fixed part 31 to the fixed part 31 of the other conductive branch 3.

[0098] It should be noted that the arc length of the second arc segment 322 is greater than the arc length of the first arc segment 321, so that the stress of the first arc segment 321 and the fixed part 31 can be effectively dispersed by the second arc segment 322, and the deformation ability of the second arc segment 322 is effectively improved.

[0099] In the embodiment, the conductive branch 3 further comprises a welding part 33 connected with one end of the third arc segment 323 away from the second arc segment 322. It can be understood that the conductive branch 3 can be welded with an external pad through the welding part 33, so as to realize the guiding of the current of the external circuit to the voice coil 1 through the conductive branch 3 and the conductive connecting piece 2.

[0100] Optionally, the centers of curvature of the first arc segment 321 and the second arc segment 322 and the center of curvature of the third arc segment 323 are located on opposite sides of the second arc segment 322. In this way, the conductive branch 3 can be connected with the conductive connecting piece 2 through the fixed part 31, and can be conveniently welded with the external pad through the welding part 33.

[0101] In the embodiment, the first arc-shaped section 321 has an angle greater than 90°, and the second arc-shaped section 322 has an angle less than 90°. In this way, the stress of the first arc-shaped section 321 can be effectively dispersed by the second arc-shaped section 322, and the first arc-shaped section 321 can be prevented from being broken.

[0102] Optionally, the minimum gap distance between the third arc-shaped section 323 and the fixed section 31 of the other conductive sheet 3 is greater than 1 mm. In this way, the third arc-shaped section 323 of one conductive sheet 3 can not interfere with the fixed section 31 and the first arc-shaped section 321 of the other conductive sheet 3, the limited space can be used to the maximum extent, and the fixed section 31 and the first arc-shaped section 321 of the conductive sheet 3 can be prevented from being broken due to stress concentration.

[0103] In the embodiment, the width of the fixed section 31 of the conductive sheet 3 can be 1 mm to 3 mm. Optionally, the width of the fixed section 31 is 1 mm, 1.5 mm, 2 mm, 2.5 mm, 3 mm, etc., which is not limited herein. It can be understood that by setting the width of the fixed section 31 in the range of 1 mm to 3 mm, the connection stability of the conductive sheet 3 and the conductive connecting piece 2 can be ensured, and the conductive smoothness can also be ensured.

[0104] Optionally, the width of the elastic arm 32 of the conductive sheet 3 is 1 mm to 3 mm. Optionally, the width of the elastic arm 32 is 1 mm, 1.5 mm, 2 mm, 2.5 mm, 3 mm, etc., which is not limited herein. In the embodiment, the width of the elastic arm 32 can be the same as the width of the fixed section 31, or the width of the elastic arm 32 is different from the width of the fixed section 31.

[0105] Optionally, the width of the elastic arm 32 is less than the width of the fixed section 31, so that the stress concentration of the fixed section 31 can be dispersed and reduced by the elastic arm 32, and the deformation ability of the elastic arm 32 can be improved.

[0106] In the embodiment, the first arc-shaped section 321, the second arc-shaped section 322, and the third arc-shaped section 323 of the elastic arm 32 can be equal in width, that is, the width of the first arc-shaped section 321, the width of the second arc-shaped section 322, and the width of the third arc-shaped section 323 are the same.

[0107] Of course, the first arc-shaped section 321, the second arc-shaped section 322, and the third arc-shaped section 323 of the elastic arm 32 can also be unequal in width.

[0108] In an embodiment, the width of the first arc-shaped section 321 gradually decreases from the fixed section 31 to the second arc-shaped section 322, the width of the second arc-shaped section 322 gradually decreases from the first arc-shaped section 321 to the third arc-shaped section 323, and the width of the third arc-shaped section 323 gradually increases from the second arc-shaped section 322 to the side away from the second arc-shaped section 322.

[0109] In another embodiment, the width of the first arc segment 321 is consistent from the fixed portion 31 to the second arc segment 322, the width of the second arc segment 322 gradually decreases from the first arc segment 321 to the third arc segment 323, and the width of the third arc segment 323 gradually increases from the second arc segment 322 to away from the second arc segment 322.

[0110] In another embodiment, the width of the first arc segment 321 is consistent from the fixed portion 31 to the second arc segment 322, the width of the second arc segment 322 gradually decreases from the first arc segment 321 to the third arc segment 323, and the width of the third arc segment 323 gradually increases from the second arc segment 322 to away from the second arc segment 322.

[0111] It can be understood that the fixed portion 31, the elastic arm 32 and the welding portion 33 of the conductive sheet 3 are located in the same plane, and the width of the fixed portion 31 and the width of the elastic arm 32 are both the width perpendicular to the extending direction in the plane.

[0112] Optionally, the thickness of the conductive sheet 3 is 0.3mm-1mm. The thickness of the conductive sheet 3 is 0.3mm, 0.5mm, 0.8mm, 1mm, etc. Such setting can ensure that the conductive sheet 3 has a certain hardness and ensures the centering effect of the conductive sheet 3 on the voice coil 1. It can be understood that the thickness of the conductive sheet 3 applied to a large horn loudspeaker is greater than the thickness of the conductive sheet 3 in a micro loudspeaker.

[0113] It should be noted that the hardness and centering ability of the existing planar sheet used in the micro loudspeaker cannot meet the requirements of the large horn loudspeaker, so the centering sheet in the large horn loudspeaker generally uses a spring wave. Through the improvement and verification of the material and shape of the conductive sheet 3, a better use effect can be finally achieved.

[0114] In the embodiment, in order to make the planar conductive sheet 3 meet the hardness requirement and the centering requirement, as shown in Figure 6 and Figure 7 The conductive sheet 3 includes an FPCB layer 34 and a reinforcing layer 35, wherein the FPCB layer 34 has a first surface and a second surface facing away from each other, and the reinforcing layer 35 is pasted to the first surface and / or the second surface through a glue layer 36.

[0115] As shown in Figure 6 The reinforcing layer 35 includes one layer, that is, the reinforcing layer 35 is pasted to the first surface or the second surface of the FPCB layer 34 through the glue layer 36. As shown in Figure 7 The reinforcing layer 35 includes two layers, that is, the two reinforcing layers 35 are pasted to the first surface and the second surface of the FPCB layer 34 through the glue layer 36 respectively. Optionally, the material of the reinforcing layer 35 is at least one of PI, PEN, PET and PEI.

[0116] In the above embodiment, the modulus of the copper layer 342 ranges from 0.7 to 3e11 pa, and the modulus of the film layer 343 and the reinforcing layer 35 ranges from 1000 to 7000 Mpa. The conductive support 3 with the modulus in the range has good compliance and deformation resistance, and meets the centering requirement of the sound generating device 600.

[0117] Optionally, the mechanical stiffness Kms of the conductive support 3 ranges from 0.1 to 1 N / mm. Specifically, the mechanical stiffness Kms of the conductive support 3 can be 0.1 N / mm, 0.2 N / mm, 0.3 N / mm, 0.4 N / mm, 0.5 N / mm, 0.6 N / mm, 0.7 N / mm, 0.8 N / mm, 0.9 N / mm, 1 N / mm, etc. Within the range, the linearity of the conductive support 3 is good, which ensures that the conductive support 3 not only can provide sufficient cushioning for the voice coil 1 of the sound generating device 600, but also will not be damaged due to plastic deformation when the sound generating device 600 has a large displacement vibration.

[0118] Optionally, the adhesive layer 36 is a thermosetting adhesive or an acrylic adhesive. It can be understood that among the adhesives for bonding the FPCB layer 34 and the reinforcing layer 35, the thermosetting adhesive can improve the adhesion between the FPCB layer 34 and the reinforcing layer 35; the acrylic adhesive has a certain damping, the resonance energy of the conductive support 3 is absorbed by the acrylic adhesive, reducing the resonance of the voice coil 1; and the reinforcing layer 35 and the FPCB layer 34 have a moment, the elongation at break of the conductive support 3 is large, and the conductive support 3 is not easy to crack. The acrylic adhesive can be an acrylic adhesive layer, which is not limited herein.

[0119] In the embodiment, the thickness of the reinforcing layer 35 can be selected to be 0.1 mm to 0.5 mm. The thickness of the reinforcing layer 35 is 0.1 mm, 0.2 mm, 0.3 mm, 0.4 mm, 0.5 mm. In this way, the strength of the conductive support 3 can be ensured, the centering ability of the conductive support 3 is enhanced, and the product resonance is reduced. The thickness of the adhesive layer 36 can be selected to be 0.015 mm to 0.1 mm. Optionally, the thickness of the adhesive layer 36 is 0.015 mm, 0.03 mm, 0.05 mm, 0.08 mm, 0.1 mm, etc., which is not limited herein.

[0120] In an embodiment, as shown in Figure 8 The FPCB layer 34 includes a substrate layer 341, a copper layer 342 and a film layer 343 which are sequentially stacked, the first surface is formed on the side of the substrate layer 341 away from the copper layer 342, and the second surface is formed on the side of the film layer 343 away from the copper layer 342. It can be understood that the FPCB layer 34 has a single copper layer 342.

[0121] In another embodiment, as shown in Figure 9As shown, the FPCB layer 34 includes a substrate layer 341, two copper layers 342, and two film layers 343. The substrate layer 341 is sandwiched between the two copper layers 342. Each film layer 343 is arranged on one side of each copper layer 342 away from the substrate layer 341. The side of each film layer 343 away from the copper layer 342 forms the first surface or the second surface. It can be understood that the FPCB layer 34 has two copper layers 342.

[0122] It can be understood that, in order to reduce the product cost or improve the overall performance of the conductive support 3, the film layer 343 on one side of the FPCB layer 34 with two copper layers 342 can be removed and replaced with a reinforcing layer 35. In this way, not only can the strength of the conductive support 3 be increased, the centering ability of the conductive support 3 can be enhanced, and the product resonance can be reduced, but also the cost can be reduced. Of course, the reinforcing layer 35 can also be directly pasted on the film layer 343 on this side, which is not limited here.

[0123] In an embodiment, the conductive connecting piece 2 includes a first connecting part 21 and a second connecting part 22 arranged at an angle. The first connecting part 21 is connected with the outer surface 12, and the second connecting part 22 is connected with the fixed part 31.

[0124] In this embodiment, as shown in Figure 1 , Figure 3 and Figure 4 , by arranging the conductive connecting piece 2 as the first connecting part 21 and the second connecting part 22 arranged at an angle, the conductive connecting piece 2 is facilitated to be connected with the outer surface 12 through the first connecting part 21 to increase the contact area and improve the connection stability. The conductive connecting piece 2 of the outer surface 12 can also be guided away from the outer surface 12 through the second connecting part 22 to facilitate the connection with the conductive support 3. Alternatively, the first connecting part 21 and the second connecting part 22 are arranged vertically.

[0125] Alternatively, the width of the second connecting part 22 is greater than the width of the first connecting part 21. In this way, the connection area between the second connecting part 22 and the conductive support 3 can be effectively increased to improve the connection stability. At the same time, by reducing the width of the first connecting part 21, the vibration assembly 100 can be applied to the sound production device 600, and the magnetic circuit system 500 can be reduced to increase the magnetic flux utilization rate.

[0126] Alternatively, the width of the first connecting part 21 gradually decreases from one end adjacent to the second connecting part 22 to one end away from the second connecting part 22.

[0127] In this embodiment, the width of the second connecting part 22 is the same as the width of the fixed part 31. In order to facilitate the connection between the conductive connecting piece 2 and the outer surface 12 of the voice coil 1 and improve the connection stability, the outer surface 12 is provided with a solder pad 13 corresponding to the conductive connecting piece 2, and the first connecting part 21 is soldered to the solder pad 13.

[0128] Optionally, the conductive connecting piece 2 is a metal sheet, so as to facilitate the conductive connection between the conductive branch 3 and the voice coil 1 through the conductive connecting piece 2. In the embodiment, the thickness of the conductive connecting piece 2 can be selected as 0.1mm-0.5mm. Optionally, the thickness of the conductive connecting piece 2 is 0.1mm, 0.2mm, 0.3mm, 0.4mm, 0.5mm, etc., which is not limited herein.

[0129] In an embodiment, as shown in Figure 1 , Figure 3 and Figure 4 , the second connecting part 22 is bent to form a supporting table 23 at the end away from the first connecting part 21, the supporting table 23 is supported at the end adjacent to the fixed part 31 of the elastic arm 32. It can be understood that, by arranging the supporting table 23, the contact area between the conductive connecting piece 2 and the conductive branch 3 is increased, so as to improve the connection stability.

[0130] In another embodiment, the end of the second connecting part 22 away from the first connecting part 21 is bent to form a flange towards the side of the fixed part 31, the flange and the second connecting part 22 enclose to form a mounting groove, and the fixed part 31 is accommodated and limited in the mounting groove. Such arrangement can improve the connection stability between the conductive connecting piece 2 and the conductive branch 3.

[0131] In yet another embodiment, the end of the second connecting part 22 away from the first connecting part 21 is provided with a welding hole for welding connection between the second connecting part 22 and the fixed part 31. Such arrangement can further enhance the connection stability between the conductive connecting piece 2 and the conductive branch 3.

[0132] As shown in Figure 10 and Figure 11 , the present application further provides a sound generating device 600, which comprises the yoke 400, the magnetic circuit system 500 and the vibration assembly 100 described above. The specific structure of the vibration assembly 100 is referred to the foregoing embodiments. Since the sound generating device 600 adopts all the technical solutions of the foregoing embodiments, it at least has all the beneficial effects brought by the technical solutions of the foregoing embodiments, which will not be described herein.

[0133] In the embodiment, as shown in Figure 10 and Figure 11 , the yoke 400 has a cavity 410, the yoke 400 is provided with a conductive terminal 420, the magnetic circuit system 500 is connected to one end of the yoke 400, the magnetic circuit system 500 is provided with a magnetic gap 510, the vibration assembly 100 is connected to the other end of the yoke 400 and is opposite and spaced from the magnetic circuit system 500, the voice coil 1 of the vibration assembly 100 is suspended in the magnetic gap 510, and the end of the conductive branch 3 of the vibration assembly 100 away from the voice coil 1 is connected to the conductive terminal 420; wherein the vibration displacement of the voice coil 1 is 1mm-15mm.

[0134] It should be noted that in the micro speaker, the vibration displacement of the voice coil 1 is less than 1 mm. In the large horn speaker, the vibration displacement of the voice coil 1 is greater than 1 mm. In the present embodiment, the vibration displacement of the voice coil 1 can be selected to be 1 mm to 15 mm, that is, the sound generating device 600 is a large horn speaker. Alternatively, the vibration displacement of the voice coil 1 is 1 mm, 2 mm, 3 mm, 4 mm, 5 mm, 6 mm, 7 mm, 8 mm, 9 mm, 10 mm, 11 mm, 12 mm, 13 mm, 14 mm, 15 mm, etc., which is not limited herein. The vibration displacement of the voice coil 1 refers to the stable displacement in the normal working process of the sound generating device 600, and does not include the displacement mutation of the voice coil 1 caused by abnormal current received by the voice coil 1 or other abnormal conditions of the sound generating device 600.

[0135] In the present embodiment, the vibration assembly 100 further comprises a diaphragm, which is connected to the end of the basket 400 away from the magnetic circuit system 500 and is opposite and spaced from the magnetic circuit system 500. One end of the voice coil 1 is connected to the diaphragm, and the other end of the voice coil 1 is suspended in the magnetic gap 510. It can be understood that the current from the external circuit is introduced into the voice coil 1 through the conductive branch 3 and the conductive connecting piece 2, and the voice coil 1 converts the electric energy into mechanical motion cutting the magnetic induction lines in the magnetic field formed by the magnetic circuit system 500, thereby driving the diaphragm to vibrate and generate sound, so as to convert the mechanical vibration into a sound signal.

[0136] It can be understood that the magnetic circuit system 500 comprises a U-shaped iron and a center magnetic circuit part, the U-shaped iron is provided with a mounting groove, the center magnetic circuit part is provided in the mounting groove and is spaced from the side wall of the mounting groove to form the magnetic gap 510. Alternatively, the center magnetic circuit part comprises at least one center magnet and a center dust shield which are stacked.

[0137] Alternatively, the basket 400 can be a cylindrical structure with one end open and the other end closed, or a cylindrical structure with both ends open, which is not limited herein. In the present embodiment, the basket 400 can be selected to be a cylindrical structure with one end open, and the end of the basket 400 away from the opening is a closed end, the closed end is provided with a mounting hole communicating with the cavity 410, the U-shaped iron of the magnetic circuit system 500 is arranged at the mounting hole and is connected and fixed with the basket 400 by welding or bonding. The diaphragm cover is arranged at the opening of the basket 400.

[0138] Alternatively, the basket 400 is provided in a cylindrical shape, and the diameter of the diaphragm is 40 mm to 75 mm. The diameter of the diaphragm is 40 mm, 45 mm, 50 mm, 55 mm, 60 mm, 65 mm, 70 mm, 75 mm, etc., which is not limited herein.

[0139] The above merely describes optional embodiments of the present application, and does not limit the patent scope of the present application, and any equivalent structural transformation made under the concept of the present application, or direct / indirect application in other related technical fields using the content of the present application specification and drawings are included in the patent protection scope of the present application.

Claims

1. A vibration assembly applied to a sound production device, characterized in that, The vibration assembly comprises: a voice coil formed with a hollow structure, the voice coil having an outer surface on a side away from the hollow structure; a conductive connecting piece provided on the outer surface; and a conductive branch piece in the form of a planar branch piece for transmitting an electrical signal to the voice coil, the conductive branch piece comprising a fixed portion and an elastic arm connected in sequence, the fixed portion being connected to the voice coil through the conductive connecting piece, and the elastic arm being arranged along a circumferential direction of the voice coil. The elastic arm comprises a first arc-shaped segment, a second arc-shaped segment and a third arc-shaped segment connected in sequence, the first arc-shaped segment being connected to the fixed portion, the second arc-shaped segment extending along the circumferential direction of the voice coil from the first arc-shaped segment to the third arc-shaped segment, the third arc-shaped segment being opposite to and spaced apart from the fixed portion of another conductive branch piece, the centers of curvature of the first arc-shaped segment and the second arc-shaped segment being located on opposite sides of the center of curvature of the third arc-shaped segment, the first arc-shaped segment having an angle greater than 90°, and the second arc-shaped segment having an angle less than 90°.

2. The vibration assembly of claim 1, wherein, The conductive connecting piece comprises a plurality of conductive connecting pieces, the plurality of conductive connecting pieces being spaced apart on the outer surface and being distributed along the circumferential direction of the voice coil. The conductive branch piece comprises a plurality of conductive branch pieces, the fixed portion of each conductive branch piece being connected to a conductive connecting piece.

3. The vibration assembly of claim 2, wherein, The plurality of elastic arms of the plurality of conductive branch pieces are arranged along the same direction of the circumferential direction of the voice coil.

4. The vibration assembly of claim 2, wherein, The voice coil is arranged in a cylindrical shape. The conductive connecting piece and the conductive branch piece each comprise four conductive connecting pieces and four conductive branch pieces, the four conductive connecting pieces being spaced apart and uniformly distributed along the circumferential direction of the voice coil, such that the angle between the line connecting the two adjacent conductive connecting pieces and the center of the voice coil is 90°, and / or the diameter of the voice coil is 14 mm to 28 mm.

5. The vibration assembly of claim 2, wherein, The minimum gap distance between the third arc-shaped segment and the fixed portion of the adjacent conductive branch piece is greater than 1 mm. The conductive branch piece further comprises a welding portion connected to one end of the third arc-shaped segment away from the second arc-shaped segment.

6. The vibration assembly of claim 2, wherein, The width of the first arc-shaped segment gradually decreases from the fixed portion to the second arc-shaped segment, the width of the second arc-shaped segment gradually decreases from the first arc-shaped segment to the third arc-shaped segment, and the width of the third arc-shaped segment gradually increases from the second arc-shaped segment to the end away from the second arc-shaped segment. Alternatively, the width of the first arc-shaped segment is consistent from the fixed portion to the second arc-shaped segment, the width of the second arc-shaped segment gradually decreases from the first arc-shaped segment to the third arc-shaped segment, and the width of the third arc-shaped segment gradually increases from the second arc-shaped segment to the end away from the second arc-shaped segment. Alternatively, the width of the first arc-shaped segment is consistent from the fixed portion to the second arc-shaped segment, the width of the second arc-shaped segment first decreases and then increases from the first arc-shaped segment to the third arc-shaped segment, and the width of the third arc-shaped segment gradually increases from the second arc-shaped segment to the end away from the second arc-shaped segment. Alternatively, the width of the first arc-shaped segment, the width of the second arc-shaped segment and the width of the third arc-shaped segment are the same.

7. The vibration assembly of claim 1, wherein, The width of the fixed portion is 1 mm to 3 mm. And / or, the width of the elastic arm is 1mm-3mm; And / or, the thickness of the conductive branch is 0.3mm-1mm.

8. The vibration assembly of claim 1, wherein, The conductive branch comprises: An FPCB layer having a first surface and a second surface facing away from each other; and A reinforcing layer adhered to the first surface and / or the second surface by a glue layer.

9. The vibration assembly of claim 8, wherein, The glue layer is a thermosetting glue or an acrylic glue; And / or, the material of the reinforcing layer is at least one of PI, PEN, PET, and PEI; And / or, the thickness of the reinforcing layer is 0.1mm-0.5mm; And / or, the thickness of the glue layer is 0.015mm-0.1mm.

10. The vibration assembly of claim 8, wherein, The FPCB layer comprises a substrate layer, a copper layer, and a film layer stacked in sequence, the first surface is formed on the side of the substrate layer away from the copper layer, and the second surface is formed on the side of the film layer away from the copper layer. Or, the FPCB layer comprises a substrate layer, two copper layers, and two film layers, the substrate layer is sandwiched between the two copper layers, each film layer is arranged on the side of each copper layer away from the substrate layer, and the side of the film layer away from the copper layer forms the first surface or the second surface.

11. The vibration assembly of any one of claims 1 to 10, wherein, The conductive connecting piece comprises a first connecting part and a second connecting part arranged at an angle, the first connecting part is connected with the outer surface, and the second connecting part is connected with the fixed part.

12. The vibration assembly of claim 11, wherein, The first connecting part and the second connecting part are arranged vertically; And / or, the width of the second connecting part is greater than that of the first connecting part; And / or, the width of the first connecting part gradually decreases from one end adjacent to the second connecting part to the other end away from the second connecting part; And / or, the width of the second connecting part is the same as that of the fixed part; And / or, the outer surface is provided with a solder pad corresponding to the conductive connecting piece, and the first connecting part is welded to the solder pad; And / or, the conductive connecting piece is a metal sheet; And / or, the thickness of the conductive connecting piece is 0.1mm-0.5mm.

13. The vibration assembly of claim 11, wherein, The other end of the second connecting part away from the first connecting part is bent towards the direction away from the first connecting part to form a bracket, and the bracket is supported on one end of the elastic arm adjacent to the fixed part; Or, the other end of the second connecting part away from the first connecting part is bent towards the side of the fixed part to form a flange, and the flange and the second connecting part enclose a mounting groove, and the fixed part is accommodated and limited in the mounting groove; Or, the other end of the second connecting part away from the first connecting part is provided with a welding hole for welding the second connecting part to the fixed part.

14. A sound producing device, characterized by The sound generating device comprises: A yoke having a cavity, the yoke being provided with a conductive terminal; A magnetic circuit system connected to one end of the yoke, the magnetic circuit system being provided with a magnetic gap; and A diaphragm connected to the other end of the yoke, the diaphragm being provided with a voice coil, the voice coil being connected to the conductive terminal. The vibrating assembly of any one of claims 1-10, wherein a diaphragm of the vibrating assembly is connected to another end of the yoke, opposite and spaced from the magnetic circuit system, a voice coil of the vibrating assembly is suspended within the magnetic gap, and a conductive tab of the vibrating assembly is connected to the conductive terminal distal from an end of the voice coil. The vibrating displacement of the voice coil is 1 mm-15 mm.

15. The sound production device of claim 14, wherein, The yoke is cylindrically shaped, and the diaphragm has a diameter of 40 mm-75 mm.

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