Conductive branch and sound production device

Abstract

The application discloses a conductive branch and a sound production device. The conductive branch is applied to the sound production device and is used for feeding the voice coil of the sound production device. The conductive branch is in a strip structure and comprises an inner conductive section, an intermediate conductive section and an outer conductive section which are connected. The inner conductive section is connected with the voice coil. The intermediate conductive section extends along the circumference of the voice coil. The outer conductive section is connected with an external circuit. The inner conductive section, the intermediate conductive section and the outer conductive section are located in the same plane. When the conductive branch is used for the sound production device, the conductive branch is electrically connected with the voice coil, and the traditional structure of the elastic wave and the silk thread is replaced, so that the structure and the assembly process are effectively simplified, and the assembly efficiency is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electro-acoustic conversion, in particular to a conductive support and a sound production device using the same. BACKGROUND

[0002] A loudspeaker is a basic sound production unit for converting electrical signals into acoustic signals. A centering support is a component for adjusting the vibration direction of a diaphragm in a loudspeaker, which suppresses the deflection 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.

[0003] In a large horn loudspeaker, 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, and cloth, and it is difficult to make the Kms very small due to the types of the above-mentioned materials. In the loudspeaker, since the Kms and the Cms are inversely proportional to each other, when the vibration amplitude is large, the compliance Cms of the centering support will be poor. This makes the resonant frequency F0 of the loudspeaker larger. Since 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 using the traditional centering support has a higher 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 of the loudspeaker is guided to the external conductive terminal 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, resulting in a complicated processing procedure of the existing loudspeaker. SUMMARY

[0005] The main purpose of the present application is to provide a conductive support for feeding power to a voice coil of a sound production device, the conductive support being in a strip structure, the conductive support comprising an inner conductive section, an intermediate conductive section and an outer conductive section connected together, the inner conductive section being connected with the voice coil, the intermediate conductive section extending along the circumference of the voice coil, the outer conductive section being connected with an external circuit, the inner conductive section, the intermediate conductive section and the outer conductive section being located in the same plane.

[0006] In an embodiment, the intermediate conductive section comprises a first arc-shaped section, a second arc-shaped section and a third arc-shaped section connected in sequence, the first arc-shaped section being connected with the inner conductive section, the third arc-shaped section being connected with the outer conductive section, the second arc-shaped section extending along the circumference of the voice coil in the direction from the first arc-shaped section to the third arc-shaped section.

[0007] In an embodiment, the centers of curvature of the first arc-shaped section and the second arc-shaped section and the center of curvature of the third arc-shaped section are located on opposite sides of the second arc-shaped section.

[0008] And / or, the first arc segment has an angle greater than 90°, and the second arc segment has an angle less than 90°.

[0009] In an embodiment, the width of the first arc segment gradually decreases from the inner conductive segment 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 outer conductive segment.

[0010] Or, the width of the first arc segment is consistent from the inner conductive segment 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 outer conductive segment.

[0011] Or, the width of the first arc segment is consistent from the inner conductive segment to the second arc segment, the width of the second arc segment first decreases and then increases 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 outer conductive segment.

[0012] Or, the width of the first arc segment, the width of the second arc segment, and the width of the third arc segment are the same.

[0013] In an embodiment, the width of the inner conductive segment is 1mm-3mm.

[0014] And / or, the width of the middle conductive segment is 1mm-3mm.

[0015] And / or, the thickness of the conductive branch is 0.3mm-1mm.

[0016] In an embodiment, the conductive branch comprises:

[0017] an FPCB layer, the FPCB layer having a first surface and a second surface facing away from each other; and

[0018] a reinforcing layer, the reinforcing layer being attached to the first surface and / or the second surface through an adhesive layer.

[0019] In an embodiment, the adhesive layer is a thermosetting adhesive or a damping adhesive.

[0020] And / or, the material of the reinforcing layer is at least one of PI, PEN, PET, and PEI.

[0021] And / or, the thickness of the reinforcing layer is 0.1mm-0.5mm.

[0022] And / or, the thickness of the adhesive layer is 0.015mm-0.1mm.

[0023] In an embodiment, the FPCB layer comprises a substrate layer, a copper layer and a film layer which are sequentially stacked, 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.

[0024] Alternatively, 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 first surface or the second surface is formed on the side of the film layer away from the copper layer.

[0025] In an embodiment, the modulus of the copper layer ranges from 0.7 to 3e11 pa, and the modulus of the film layer and the reinforcing layer ranges from 1000 to 7000 Mpa.

[0026] In an embodiment, the mechanical kms of the conductive branch is 0.1-1 N / mm.

[0027] And / or, the conductive branch is connected with the voice coil through a conductive connecting piece, and the conductive connecting piece is arranged on the outer surface of the voice coil.

[0028] The application further provides a sound generating device, which comprises:

[0029] A yoke, wherein a conductive terminal is arranged on the yoke, and the conductive terminal is electrically connected with an external circuit.

[0030] A magnetic circuit system, wherein the magnetic circuit system is connected to the yoke, and the magnetic circuit system is provided with a magnetic gap.

[0031] A vibration assembly, wherein the vibration assembly is connected to the yoke and opposite to the magnetic circuit system, the vibration assembly comprises the voice coil and the conductive branch as claimed in any one of claims 1 to 10, the voice coil is arranged in the magnetic gap, the conductive branch is connected with the conductive terminal and transmits an electrical signal to the voice coil.

[0032] In an embodiment, the vibration displacement of the voice coil is 1 mm to 15 mm.

[0033] In an embodiment, the voice coil is in a cylindrical structure, the conductive branch comprises a plurality of conductive branches, the plurality of conductive branches are arranged at intervals in the circumferential direction of the voice coil, and the plurality of conductive branches are located in the same plane.

[0034] When the conductive branch is applied to the sound generating device, the conductive branch is electrically connected with the voice coil, replacing the traditional spring and silk thread structure, effectively simplifying the structure and assembly process of the sound generating device and improving the assembly efficiency. Meanwhile, the conductive branch is in a planar structure, further reducing the occupied space of the sound generating device, which is conducive to the development of thin sound generating devices. BRIEF DESCRIPTION OF DRAWINGS

[0035] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed in the embodiments or the prior art description will be briefly introduced. Obviously, the drawings in the following description only constitute some embodiments of the present application, and for those skilled in the art, other drawings can be obtained from the structures shown in the drawings without creative labor.

[0036] Figure 1 Structure diagram of the conductive support in an embodiment of the present application;

[0037] Figure 2 Exploded diagram of the conductive support in an embodiment of the present application;

[0038] Figure 3 Exploded diagram of the conductive support in another embodiment of the present application;

[0039] Figure 4 Sectional diagram of the FPCB layer in an embodiment of the present application;

[0040] Figure 5 Sectional diagram of the FPCB layer in another embodiment of the present application;

[0041] Figure 6 Structure diagram of the vibration assembly in an embodiment of the present application;

[0042] Figure 7 Top view structure diagram of the vibration assembly in an embodiment of the present application;

[0043] Figure 8 Part sectional diagram of the vibration assembly in an embodiment of the present application;

[0044] Figure 9 Structure diagram of the conductive connecting piece in an embodiment of the present application;

[0045] Figure 10 Structure diagram of the sound emitting device in an embodiment of the present application;

[0046] Figure 11 Sectional diagram of the sound emitting device in an embodiment of the present application.

[0047] BRIEF DESCRIPTION OF DRAWINGS

[0048] Reference Name Reference Name 100 Vibration assembly 323 Third arc-shaped segment 1 Voice coil 33 Outer conductive segment 11 Hollow structure 34 FPCB layer 12 Outer surface 341 Base material layer 13 Welding part 342 Copper layer 2 Conductive connecting piece 343 Film layer 21 First connecting part 35 Reinforcing layer 22 Second connecting part 36 Glue layer 23 Chucking table 400 Bowl stand 3 Conductive branch 410 Cavity 31 Inner conductive segment 420 Conductive terminal 32 Intermediate conductive segment 500 Magnetic circuit system 321 First arc-shaped segment 510 Magnetic gap 322 Second arc-shaped segment 600 Sound production device

[0049] The implementation, functional features and advantages of the present application will be further described with reference to the embodiments and the drawings. DETAILED DESCRIPTION

[0050] With reference to the drawings of the embodiments of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by a person of ordinary skill in the art without creative effort belong to the scope of protection of the present application.

[0051] It should be noted that all the direction indications (such as up, down, left, right, front, back, and the like) in the embodiments of the present application are only used to explain the relative position relationship, motion condition and the like between components in a certain specific posture (as shown in the drawings), and if the specific posture changes, the direction indications also change accordingly.

[0052] Meanwhile, "and / or" or "or / and" appearing throughout the specification means including three schemes, taking "A and / or B" as an example, including A scheme, or B scheme, or A and B schemes.

[0053] 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 of the indicated technical features 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 fact that a person of ordinary skill in the art can realize it, and when the combination of technical solutions contradicts each other or cannot be realized, it should be considered that the combination of technical solutions does not exist and is not within the scope of protection required by the present application.

[0054] A loudspeaker is a basic sound unit for converting an electrical signal into an acoustic signal. A 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 spider greatly affects the acoustic performance and service life of the loudspeaker.

[0055] In the related art, the spider is annular, and the annular spider is arranged in a wave structure along the radial direction. The spider is usually made of materials such as conex, blended fabric, and cloth, and is limited by the above-mentioned material types, so it is difficult to make the Kms very small. In the loudspeaker, since the Kms and the Cms are inversely related, when the vibration amplitude is large, the compliance Cms of the spider will 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 spider has a high total harmonic distortion THD. This reduces the acoustic performance of the loudspeaker and greatly affects the user's experience.

[0056] In addition, since the material of the centering sheet is usually chemical fiber, blended fabric, etc., the hardness of the centering sheet increases in a high-temperature and humid environment, which causes the centering sheet to easily deform or even break and reduces the fatigue performance of the centering sheet. The failure of the centering sheet directly causes the failure of the loudspeaker, and significantly shortens the service life of the loudspeaker.

[0057] Meanwhile, the centering sheet cannot conduct electricity, and an additional silk thread needs to be arranged in the sound production device. The lead wire of the voice coil of the loudspeaker is guided to the external conductive terminal from above the centering sheet through the silk thread. The centering sheet needs to set a wire path for the silk thread during the processing, which causes the processing steps of the existing loudspeaker to be complicated.

[0058] Based on the above ideas and problems, the present application provides a conductive sheet 3, which can be understood as being applied to a sound production device 600 for feeding the voice coil of the sound production device 600. The sound production device 600 can be applied to a terminal device such as a sound box, a television, a car, etc.

[0059] Please refer to Figures 1 to 3 , Figures 6 to 10 In the embodiment of the present application, the conductive sheet 3 is in a strip structure, which includes an inner conductive section 31, an intermediate conductive section 32 and an outer conductive section 33 connected with each other. The inner conductive section 31 is connected with the voice coil 1, the intermediate conductive section 32 extends along the circumference of the voice coil 1, and the outer conductive section 33 is connected with an external circuit. The inner conductive section 31, the intermediate conductive section 32 and the outer conductive section 33 are located in the same plane.

[0060] It can be understood that the voice coil 1 of the sound production device 600 is configured to be capable of passing an electric signal. The voice coil 1 is a structure formed by winding a voice coil 1 wire on a framework. In the embodiment, the voice coil 1 includes a framework and a voice coil 1 wire arranged on the framework. The voice coil 1 wire can be made of a metal material capable of passing an electric current. Alternatively, the framework of the voice coil 1 is a circular cylinder, a square cylinder, a racetrack type or other shapes of cylinder, which is not limited herein.

[0061] It can be understood that the inner conductive section 31 can be directly connected with the voice coil 1 or connected with the voice coil 1 through other conductive connecting pieces. The conductive connecting pieces can be metal sheets or other structures.

[0062] The conductive sheet 3 of the present application not only can realize the centering effect of the voice coil 1, but also can realize the conductive communication between the voice coil 1 and the external circuit. By setting the conductive sheet 3 as a planar sheet, on the one hand, the processing is facilitated and the processing steps are simplified, and on the other hand, the height space occupied by the conductive sheet 3 is reduced, which is convenient for the thin design of the sound production device 600. Meanwhile, the conductive sheet 3 is set as a long strip, and the intermediate conductive section 32 extends along the circumference of the voice coil 1, which further reduces the space occupied in the width direction of the sound production device 600, and is convenient for the miniaturization design of the sound production device 600.

[0063] The traditional voice coil centering support is annular, is sleeved on the periphery of the voice coil 1, and is arranged in a wave shape in the radial direction. The traditional voice coil centering support is not only complicated to process, but also cannot be electrically connected with the voice coil 1, and thus a silk wire needs to be additionally arranged to be connected with the lead wire of the voice coil 1, so as to conduct the voice coil 1 with an external circuit through the silk wire. Meanwhile, the silk wire is arranged above the voice coil centering support, and a wire arrangement structure needs to be arranged above the voice coil centering support to facilitate the wire arrangement of the silk wire, and a wire arrangement space needs to be reserved for the silk wire, so as to further complicate the processing steps of the voice coil centering support and complicate the structure of the sound generating device 600.

[0064] The conductive support 3 of the present application can replace the traditional voice coil centering support and silk wire structure when applied to the sound generating device 600, effectively simplifying the structure and processing steps of the sound generating device 600 and saving costs. Meanwhile, the sound generating device 600 using the conductive support 3 of the present application does not need to reserve a wire arrangement space for the traditional silk wire, and can reduce the thickness of the sound generating device 600, which is beneficial to the thinning design of the sound generating device 600.

[0065] In the present embodiment, the conductive support 3 is arranged as the connected inner conductive section 31, intermediate conductive section 32 and outer conductive section 33, and the intermediate conductive section 32 is arranged to extend along the circumference of the voice coil 1. In this way, the deformation ability of the conductive support 3 is improved, the fracture of the conductive support 3 is effectively avoided, and the stress concentration problem of the conductive support 3 at the inner conductive section 31 is also dispersed.

[0066] More specifically, the intermediate conductive section 32 includes the sequentially connected first arc-shaped section 321, second arc-shaped section 322 and third arc-shaped section 323, the first arc-shaped section 321 is connected with the inner conductive section 31, the third arc-shaped section 323 is connected with the outer conductive section 33, and the second arc-shaped section 322 extends along the circumference of the voice coil 1 from the direction of the first arc-shaped section 321 to the third arc-shaped section 323.

[0067] In the present embodiment, the first arc-shaped section 321, second arc-shaped section 322 and third arc-shaped section 323 of the intermediate conductive section 32 are integrally formed. The first arc-shaped section 321 is connected with the inner conductive section 31, and is used to guide the intermediate conductive section 32 from the outer surface 12 adjacent to the voice coil 1 to the outer surface 12 away from the voice coil 1. That is, the first arc-shaped section 321 is guided from the inner conductive section 31 perpendicular to the outer surface 12 of the voice coil 1 to the outer surface 12 away from the outer surface 12, and is close to parallel with the outer surface 12, and the first arc-shaped section 321 is curved towards the second arc-shaped section 322.

[0068] It can be understood that the extension direction of the second arc-shaped section 322 is close to consistent with the circumferential direction of the outer surface 12 of the voice coil 1.

[0069] 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 inner conductive segment 31 can be effectively dispersed by the second arc segment 322, and the deformation ability of the second arc segment 322 is effectively improved.

[0070] Optionally, the curvature centers of the first arc segment 321 and the second arc segment 322 and the curvature center 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 conveniently connected to the voice coil 1 through the inner conductive segment 31, and conveniently connected to the external conductive terminal through the outer conductive segment 33.

[0071] In an embodiment, the turning angle of the first arc segment 321 is greater than 90°, and the turning angle of the second arc segment 322 is less than 90°. In this way, the stress of the first arc segment 321 can be effectively dispersed by the second arc segment 322, and the first arc segment 321 is prevented from being broken.

[0072] In an embodiment, the width of the inner conductive segment 31 of the conductive branch 3 can be selected to be 1mm-3mm. Optionally, the width of the inner conductive segment 31 is 1mm, 1.5mm, 2mm, 2.5mm, 3mm, etc., which is not limited herein. It can be understood that by setting the width of the inner conductive segment 31 in the range of 1mm-3mm, the connection stability of the conductive branch 3 can be ensured, and the conductive smoothness can also be ensured.

[0073] Optionally, the width of the intermediate conductive segment 32 of the conductive branch 3 is 1mm-3mm. Optionally, the width of the intermediate conductive segment 32 is 1mm, 1.5mm, 2mm, 2.5mm, 3mm, etc., which is not limited herein. In the present embodiment, the width of the intermediate conductive segment 32 can be the same as the width of the inner conductive segment 31; or, the width of the intermediate conductive segment 32 is different from the width of the inner conductive segment 31.

[0074] Optionally, the width of the intermediate conductive segment 32 is less than the width of the inner conductive segment 31, so that the stress concentration of the inner conductive segment 31 can be dispersed and reduced by the intermediate conductive segment 32, and the deformation ability of the intermediate conductive segment 32 can be improved.

[0075] In the present embodiment, the first arc segment 321, the second arc segment 322 and the third arc segment 323 of the intermediate conductive segment 32 can be equal in width, that is, the width of the first arc segment 321, the width of the second arc segment 322 and the width of the third arc segment 323 are the same.

[0076] Of course, the first arc segment 321, the second arc segment 322 and the third arc segment 323 of the intermediate conductive segment 32 can also be unequal in width.

[0077] In one embodiment, the width of the first arc segment 321 gradually decreases from the inner conductive segment 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 a distance away from the second arc segment 322.

[0078] In another embodiment, the width of the first arc segment 321 is consistent from the inner conductive segment 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 a distance away from the second arc segment 322.

[0079] In another embodiment, the width of the first arc segment 321 is consistent from the inner conductive segment 31 to the second arc segment 322, the width of the second arc segment 322 first decreases and then increases 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.

[0080] It is understandable that the inner conductive segment 31, the middle conductive segment 32 and the outer conductive segment 33 of the conductive support 3 are located in the same plane, and the width of the inner conductive segment 31 and the width of the middle conductive segment 32 both refer to the width in the plane perpendicular to their extension direction.

[0081] Optionally, the thickness of the conductive support piece 3 is 0.3mm to 1mm. The thickness of the conductive support piece 3 can be 0.3mm, 0.5mm, 0.8mm, 1mm, etc. This setting ensures that the conductive support piece 3 has a certain degree of rigidity, ensuring its centering effect on the voice coil 1. Understandably, the thickness of the conductive support piece 3 used in large loudspeakers is greater than that used in miniature loudspeakers.

[0082] It should be noted that the rigidity and centering ability of existing planar supports used in miniature loudspeakers do not meet the requirements of large loudspeakers. Therefore, spiders are generally used as centering supports in large loudspeakers. This application improves and verifies the material and shape of the conductive support 3, ultimately enabling the conductive support 3 to be applied to large loudspeakers.

[0083] In this embodiment, in order for the conductive support sheet 3 to meet the requirements for hardness and compliance, such as Figures 2 to 5 As shown, the conductive support 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 that are opposite to each other, and the reinforcing layer 35 is attached to the first surface and / or the second surface by an adhesive layer 36.

[0084] like Figure 2As shown, the reinforcing layer 35 includes one layer, that is, the reinforcing layer 35 is attached to the first surface or the second surface of the FPCB layer 34 through the adhesive layer 36. Figure 3 As shown, the reinforcing layer 35 includes two layers, that is, the two reinforcing layers 35 are respectively attached to the first surface and the second surface of the FPCB layer 34 through the adhesive layer 36. Optionally, the material of the reinforcing layer 35 is at least one of PI, PEN, PET, and PEI.

[0085] It can be understood that when the first surface and the second surface of the FPCB layer 34 are both provided with the reinforcing layer 35, the materials of the reinforcing layers 35 on the first surface and the second surface can be the same or different. Further, in the two end regions of the conductive branch 3, the reinforcing layer 35 on the first surface and the reinforcing layer 35 on the second surface do not coincide in shape. That is, the reinforcing layer 35 on the first surface and the reinforcing layer 35 on the second surface do not coincide in shape at one end close to the inner conductive section 31, or the reinforcing layer 35 on the first surface and the reinforcing layer 35 on the second surface do not coincide in shape at one end close to the outer conductive section 33, or the reinforcing layer 35 on the first surface and the reinforcing layer 35 on the second surface do not coincide in shape at one end close to the inner conductive section 31 and one end close to the outer conductive section 33. In this way, the stress concentration of the conductive branch 3 can be avoided, and the risk of fracture failure of the conductive branch 3 caused by concentrated and repeated stress at a certain point during operation can be effectively avoided.

[0086] 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 bonding force between the FPCB layer 34 and the reinforcing layer 35; the acrylic adhesive has a certain damping, and the resonance energy of the conductive branch 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 branch 3 is large, and the conductive branch 3 is not easy to crack. The acrylic adhesive can be an acrylic adhesive, which is not limited here.

[0087] In this embodiment, the loss factor of the adhesive layer 36 is 0-1.5, and the loss factor of the adhesive layer 36 is in the range of 0-1.5, which can improve the damping performance of the adhesive layer 36, and further improve the performance of the conductive branch 3, reduce the resonance of the sound generating device 600, and improve the acoustic performance of the sound generating device 600.

[0088] Optionally, the loss factor of the adhesive layer 36 can be 0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, 1.0, 1.1, 1.2, 1.3, 1.4, 1.5, which is not limited here.

[0089] Further, the thickness of the adhesive layer 36 can be selected as 0.015mm-0.1mm. Optionally, the thickness of the adhesive layer 36 can be 0.015mm, 0.03mm, 0.05mm, 0.08mm, 0.1mm, etc. The storage modulus of the adhesive layer 36 is 0-2Mpa, so that the conductive support 3 has better compliance, improves the deformation resistance of the conductive support 3, and improves the centering performance.

[0090] In the embodiment, the thickness of the reinforcing layer 35 can be selected as 0.1mm-0.5mm. The thickness of the reinforcing layer 35 can be 0.1mm, 0.2mm, 0.3mm, 0.4mm, 0.5mm. In this way, the strength of the conductive support 3 can be guaranteed, and the centering ability of the conductive support 3 can be enhanced. The thickness of the adhesive layer 36 can be selected as 0.015mm-0.1mm. Optionally, the thickness of the adhesive layer 36 can be 0.015mm, 0.03mm, 0.05mm, 0.08mm, 0.1mm, etc. In this way, the product resonance can be reduced.

[0091] In an embodiment, as shown in Figure 2 , 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.

[0092] In another embodiment, as shown in Figure 3 , 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 the side of each copper layer 342 away from the substrate layer 341, and the first surface or 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 double copper layer 342.

[0093] It can be understood that, in order to reduce the cost of the product or improve the overall performance of the conductive support 3, for the FPCB layer 34 with a double copper layer 342, the film layer 343 on one side can be removed and replaced with a reinforcing layer 35. In this way, the strength of the conductive support 3 can be increased, the centering ability of the conductive support 3 can be enhanced, the product resonance can be reduced, and 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 herein.

[0094] In the above embodiments, the modulus of the copper layer 342 ranges from 0.7 to 3e11pa, and the modulus of the film layer 343 and the reinforcing layer 35 ranges from 1000 to 7000Mpa. The conductive support 3 within this modulus range has good compliance and deformation resistance, which meets the centering requirements of the sound generating device 600.

[0095] In an embodiment, the mechanical stiffness Kms of the conductive support piece is 0.1-1 N / mm. Specifically, the mechanical stiffness Kms of the conductive support piece 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 this range, the linearity of the conductive support piece 3 is better, which ensures that the conductive support piece 3 not only can provide sufficient cushioning for the voice coil 1 of the sound production device 600, but also will not be damaged by plastic deformation when the sound production device 600 has a large displacement vibration.

[0096] In the present embodiment, the voice coil 1 can be cylindrical. The voice coil 1 has a hollow structure 11, which can be a hollow cavity, i.e., the two ends of the hollow structure 11 have openings that 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 end portions at the two ends.

[0097] In order to facilitate the connection of the voice coil 1 and the planar conductive support piece 3, improve the connection stability and conductive smoothness, in the present embodiment, the outer surface 12 of the voice coil 1 is provided with a conductive connecting piece 2. It can be understood that the conductive connecting piece 2 can be integrally formed on the outer surface 12 of the voice coil 1, so as to improve the connection stability and conductive smoothness of the voice coil 1 and the conductive connecting piece 2. Of course, the conductive connecting piece 2 and the voice coil 1 can also be separately arranged, and the conductive connecting piece 2 is fixed to the outer surface 12 of the voice coil 1 by welding or bonding, which is not limited herein.

[0098] Optionally, the outer surface 12 of the voice coil 1 is provided with a welding portion 13 corresponding to the conductive connecting piece 2, and the conductive connecting piece 2 is fixedly connected with the welding portion 13.

[0099] In an embodiment, the conductive connecting piece 2 includes a first connecting portion 21 and a second connecting portion 22 arranged at an angle, the first connecting portion 21 is connected with the outer surface 12, and the second connecting portion 22 is connected with the inner conductive segment 31.

[0100] In the present embodiment, as shown in Figures 6 to 11 The conductive connecting piece 2 is arranged as a first connecting portion 21 and a second connecting portion 22 arranged at an angle, so as to facilitate the connection of the conductive connecting piece 2 with the outer surface 12 through the first connecting portion 21 to increase the contact area and improve the connection stability, and the conductive connecting piece 2 of the outer surface 12 can be guided away from the outer surface 12 through the second connecting portion 22 to facilitate the connection with the conductive support piece 3. Optionally, the first connecting portion 21 and the second connecting portion 22 are arranged vertically.

[0101] Optionally, the width of the second connecting portion 22 is greater than the width of the first connecting portion 21. In this way, the connecting area of the second connecting portion 22 and the conductive branch 3 can be effectively increased, so as to improve the connection stability. Meanwhile, the width of the first connecting portion 21 is reduced, so that the vibration conductive branch 3 can be applied to the sound production device 600, the avoiding space of the magnetic circuit system 500 can be reduced, and thus the magnetic flux utilization rate is increased.

[0102] Optionally, the width of the first connecting portion 21 gradually decreases from the end adjacent to the second connecting portion 22 to the end away from the second connecting portion 22.

[0103] In the embodiment, the width of the second connecting portion 22 is the same as the width of the inner conductive segment 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 welding portion 13 corresponding to the conductive connecting piece 2, and the first connecting portion 21 is welded to the welding portion 13.

[0104] Optionally, the conductive connecting piece 2 is a metal sheet, so that the conductive branch 3 can be conductively connected to the voice coil 1 through the conductive connecting piece 2. In the embodiment, the thickness of the conductive connecting piece 2 can be 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.

[0105] In an embodiment, as shown in Figures 6 to 10 the end of the second connecting portion 22 away from the first connecting portion 21 is bent to form a support 23 facing away from the first connecting portion 21, and the support 23 is supported on the intermediate conductive segment 32 adjacent to the end of the inner conductive segment 31. It can be understood that, by arranging the support 23, the contact area of the conductive connecting piece 2 and the conductive branch 3 is increased, so as to improve the connection stability.

[0106] In another embodiment, the end of the second connecting portion 22 away from the first connecting portion 21 is bent to form a flange facing the inner conductive segment 31, and the flange and the second connecting portion 22 enclose a mounting groove, and the inner conductive segment 31 is accommodated and limited in the mounting groove. In this way, the connection stability of the conductive connecting piece 2 and the conductive branch 3 can be improved.

[0107] In yet another embodiment, the end of the second connecting portion 22 away from the first connecting portion 21 is provided with a welding hole for welding the second connecting portion 22 to the inner conductive segment 31. In this way, the connection stability of the conductive connecting piece 2 and the conductive branch 3 can be further improved.

[0108] As shown in Figure 10 and Figure 11As shown, the present application also proposes a sound generating device 600, which comprises the basket 400, the magnetic circuit system 500 and the vibration assembly 100. The vibration assembly 100 adopts the conductive branch 3 described above, and the specific structure of the conductive branch 3 refers 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.

[0109] In the embodiment, as shown in Figure 10 and Figure 11 The basket 400 has a cavity 410. The basket 400 is provided with a conductive terminal 420 connected with an external circuit. The magnetic circuit system 500 is connected to one end of the basket 400 and is provided with a magnetic gap 510. The vibration assembly 100 is connected to the other end of the basket 400 and is opposite to the magnetic circuit system 500. The voice coil 1 of the vibration assembly 100 is suspended in the magnetic gap 510. The end of the conductive branch 3 away from the voice coil 1 is connected with the conductive terminal 420 to transmit the electric signal to the voice coil 1 through the conductive branch 3. The vibration displacement of the voice coil 1 is 1mm-15mm.

[0110] It should be noted that in a micro loudspeaker, the vibration displacement of the voice coil 1 is less than 1mm. In a large loudspeaker, the vibration displacement of the voice coil 1 is greater than 1mm. In the embodiment, the vibration displacement of the voice coil 1 can be selected as 1mm-15mm, i.e., the sound generating device 600 is a large loudspeaker. Alternatively, the vibration displacement of the voice coil 1 is 1mm, 2mm, 3mm, 4mm, 5mm, 6mm, 7mm, 8mm, 9mm, 10mm, 11mm, 12mm, 13mm, 14mm, 15mm, 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 the abnormal current received by the voice coil 1 or other abnormal situations of the sound generating device 600.

[0111] In an embodiment, the voice coil 1 is in a cylindrical shape, and the diameter of the voice coil 1 can be selected as 14mm-28mm. It should be noted that when the sound generating device 600 is a large loudspeaker, the voice coil 1 is in a cylindrical structure, and the diameter range of the voice coil 1 is relatively large. Alternatively, the diameter of the voice coil 1 is 14mm, 16mm, 18mm, 20mm, 22mm, 25mm, 28mm, etc., which is not limited herein.

[0112] In the embodiment, the plurality of conductive branches 3 are arranged along the circumference of the voice coil 1 at intervals, and the plurality of conductive branches 3 are located in the same plane. Specifically, the plurality of conductive branches 3 are distributed at equal intervals along the circumference of the voice coil 1, and the plurality of intermediate conductive segments 32 of the plurality of conductive branches 3 are arranged to extend in the same direction along the circumference of the voice coil 1. It can be understood that such arrangement not only improves the centering effect of the conductive branches 3 on the voice coil 1, but also helps to avoid interference of the intermediate conductive segments 32 on the adjacent conductive branches 3. At the same time, the plurality of conductive branches 3 are arranged in the same plane, which further reduces the space occupied by the plurality of conductive branches 3 in the height direction, and is conducive to the development of thin type of the sound production device 600.

[0113] The above description is only optional embodiments of the present application, and does not limit the patent scope of the present application. Any equivalent structural transformation, direct / indirect application in other related technical fields based on the concept of the present application, and the contents of the present application specification and drawings are included in the patent protection scope of the present application.

Claims

1. A conductive support sheet, characterized in that, The conductive support is used to feed power to the voice coil of the sound-generating device. The conductive support has a strip-shaped structure and includes an inner conductive section, a middle conductive section, and an outer conductive section connected to each other. The inner conductive section is connected to the voice coil, the middle conductive section extends circumferentially along the voice coil, and the outer conductive section is connected to an external circuit. The inner conductive section, the middle conductive section, and the outer conductive section are located in the same plane. The intermediate conductive segment includes a first arc segment, a second arc segment, and a third arc segment connected in sequence. The first arc segment is connected to the inner conductive segment, and the third arc segment is connected to the outer conductive segment. The second arc segment extends circumferentially along the voice coil from the first arc segment to the third arc segment. The curvature centers of the first arc segment and the second arc segment and the curvature center of the third arc segment are located on opposite sides of the second arc segment. The rotation angle of the first arc segment is greater than 90°, and the rotation angle of the second arc segment is less than 90°.

2. The conductive support sheet according to claim 1, characterized in that, The width of the first arc segment gradually decreases from the inner conductive segment 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 outer conductive segment. Alternatively, the width of the first arc segment is consistent from the inner conductive segment 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 outer conductive segment; Alternatively, the width of the first arc segment is consistent from the inner conductive segment to the second arc segment, the width of the second arc segment decreases first and then increases 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 outer conductive segment; Alternatively, the widths of the first arc segment, the second arc segment, and the third arc segment may be the same.

3. The conductive support sheet according to claim 1, characterized in that, The width of the inner conductive section is 1mm to 3mm; And / or, the width of the intermediate conductive segment is 1mm to 3mm; And / or, the thickness of the conductive support sheet is 0.3mm to 1mm.

4. The conductive support sheet according to claim 1, characterized in that, The conductive support includes: An FPCB layer, the FPCB layer having a first surface and a second surface that are opposite to each other; and A reinforcing layer is attached to the first surface and / or the second surface by an adhesive layer.

5. The conductive support sheet according to claim 4, characterized in that, The adhesive layer is a thermosetting adhesive or a damping adhesive; And / or, the reinforcing layer is made of at least one of PI, PEN, PET, and PEI; And / or, the thickness of the reinforcing layer is 0.1 mm to 0.5 mm; And / or, the thickness of the adhesive layer is 0.015mm to 0.1mm.

6. The conductive support sheet according to claim 4, characterized in that, The FPCB layer includes a substrate layer, a copper layer and a film layer stacked sequentially. The side of the substrate layer facing away from the copper layer forms the first surface, and the side of the film layer facing away from the copper layer forms the second surface. Alternatively, the FPCB layer includes a substrate layer, two copper layers and two coating layers, with the substrate layer sandwiched between the two copper layers, and each coating layer disposed on the side of each copper layer facing away from the substrate layer, the side of the coating layer facing away from the copper layer forming the first surface or the second surface.

7. The conductive support sheet according to claim 6, characterized in that, The modulus of the copper layer ranges from 0.7 to 3e11 Pa, and the modulus of the coating layer and the reinforcing layer ranges from 1000 to 7000 MPa.

8. The conductive support sheet according to any one of claims 1 to 7, characterized in that, The mechanical strength of the conductive support sheet is 0.1-1 N / mm. And / or, the conductive support is connected to the voice coil via a conductive connector, the conductive connector being disposed on the outer surface of the voice coil.

9. A sound-generating device, characterized in that, The sound-generating device includes: A basin stand, wherein the basin stand is provided with conductive terminals, and the conductive terminals are electrically connected to an external circuit; A magnetic circuit system, the magnetic circuit system being connected to the basin frame, the magnetic circuit system being provided with a magnetic gap; A vibration assembly is connected to the frame and opposite to the magnetic circuit system. The vibration assembly includes the voice coil and a conductive support plate as described in any one of claims 1 to 8. The voice coil is disposed within the magnetic gap. The conductive support plate is connected to the conductive terminal and transmits an electrical signal to the voice coil. The vibration displacement of the voice coil is 1mm to 15mm.

10. The sound-generating device as claimed in claim 9, characterized in that, The voice coil has a cylindrical structure, and the conductive support includes multiple conductive supports spaced apart around the circumference of the voice coil, and the multiple conductive supports are located in the same plane.

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