CN116437272A

CN116437272A - Conductive support sheet and sounding device

Info

Publication number: CN116437272A
Application number: CN202310364851.3A
Authority: CN
Inventors: 赵国栋; 王景伟; 强寿松; 尚佳城
Original assignee: Goertek Inc
Current assignee: Goertek Inc
Priority date: 2023-03-31
Filing date: 2023-03-31
Publication date: 2023-07-14

Abstract

The invention discloses a conductive support sheet and a sound generating device, wherein the conductive support sheet is applied to the sound generating device and is used for feeding electricity to a voice coil of the sound generating device, the conductive support sheet is of a strip-shaped structure and comprises an inner conductive section, a middle conductive section and an outer conductive section which are connected, the inner conductive section is connected with the voice coil, the middle conductive section extends along the circumferential direction of the voice coil, the outer conductive section is connected with an external circuit, and the inner conductive section, the middle conductive section and the outer conductive section are positioned on the same plane. When the conductive support piece is used for the sound production device, the conductive support piece is electrically connected with the voice coil, so that the traditional elastic wave and nylon wire structure is replaced, the structure and the assembly process are effectively simplified, and the assembly efficiency is improved.

Description

Conductive support sheet and sounding device

Technical Field

The invention relates to the technical field of electroacoustic conversion, in particular to a conductive support sheet and a sound generating device using the conductive support sheet.

Background

A speaker is a basic sound generating unit that converts an electrical signal into an acoustic signal. The centering support is a component for adjusting the vibration direction of the diaphragm in the loudspeaker, and suppresses the polarization of the diaphragm by a mechanical restoring force. The performance of the centering tabs has a great influence on the acoustic performance and the service life of the loudspeaker.

In the large horn loudspeaker, the centering support piece is annular, and the annular centering support piece is arranged into a wave structure along the radial direction. Centring tabs are generally made of materials such as conex, blends, cloths, etc., limited to the above types of materials, which are difficult to make in a small Kms. In the loudspeaker, since Kms and Cms are reciprocal, when the vibration amplitude is large, the compliance Cms of the centering support is poor. This makes the resonance frequency F0 of the speaker larger. Since F0 is an important factor affecting the acoustic performance of the speaker, a larger F0 will result in poor bass sensitivity of the speaker product. Meanwhile, the loudspeaker adopting the traditional centering support piece has higher total harmonic distortion THD. Thus, the acoustic performance of the speaker is reduced, and the use feeling of the user is greatly affected.

Meanwhile, the voice coil lead wire of the loudspeaker is guided to the external conductive terminal from the upper part of the centering support piece through the nylon wire, and the centering support piece is required to be provided with a wire-following path for the wire of the nylon wire in the processing process, so that the processing steps of the existing loudspeaker are complicated.

Disclosure of Invention

The invention mainly aims to provide a conductive support sheet which is used for feeding electricity to a voice coil of a sound generating device and is of a strip-shaped structure, wherein the conductive support sheet comprises an inner conductive section, a middle conductive section and an outer conductive section which are connected, the inner conductive section is connected with the voice coil, the middle conductive section extends along the circumferential direction of the voice coil, the outer conductive section is connected with an external circuit, and the inner conductive section, the middle conductive section and the outer conductive section are positioned on the same plane.

In an embodiment, the middle conductive segment includes a first arc segment, a second arc segment and a third arc segment that are sequentially connected, the first arc segment is connected with the inner conductive segment, the third arc segment is connected with the outer conductive segment, and the second arc segment extends along the circumference of the voice coil from the first arc segment to the third arc segment.

In an embodiment, the centers of curvature of the first and second arcuate segments and the center of curvature of the third arcuate segment are located on opposite sides of the second arcuate segment;

and/or, the rotation angle of the first arc-shaped section is larger than 90 degrees, and the rotation angle of the second arc-shaped section is smaller than 90 degrees.

In an embodiment, the width of the first arcuate segment decreases gradually from the inner conductive segment to the second arcuate segment, the width of the second arcuate segment decreases gradually from the first arcuate segment to the third arcuate segment, and the width of the third arcuate segment increases gradually from the second arcuate segment to the outer conductive segment;

or the width of the first arc-shaped section is consistent from the inner conductive section 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 outer conductive section;

or the width of the first arc-shaped section is consistent from the inner conductive section to the second arc-shaped section, the width of the second arc-shaped section is gradually increased from the first arc-shaped section to the third arc-shaped section, and the width of the third arc-shaped section is gradually increased from the second arc-shaped section to the outer conductive section;

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.

In one embodiment, the width of the inner conductive segment is 1 mm-3 mm;

and/or the width of the middle conductive section is 1 mm-3 mm;

and/or the thickness of the conductive supporting sheet is 0.3 mm-1 mm.

In one embodiment, the conductive support sheet includes:

an FPCB layer having first and second surfaces facing away from each other; and

the reinforcing layer is adhered to the first surface and/or the second surface through an adhesive layer.

In an embodiment, the adhesive layer is a thermosetting adhesive or a damping adhesive;

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

and/or the thickness of the reinforcing layer is 0.1 mm-0.5 mm;

and/or the thickness of the adhesive layer is 0.015 mm-0.1 mm.

In an embodiment, the FPCB layer includes a substrate layer, a copper layer and a film layer that are sequentially stacked, where a side of the substrate layer facing away from the copper layer forms the first surface, and a side of the film layer facing away from the copper layer forms the second surface;

or, the FPCB layer comprises a substrate layer, two copper layers and two film coating layers, wherein the substrate layer is arranged between the two copper layers in a clamping manner, each film coating layer is arranged on one side of each copper layer, which is opposite to the substrate layer, and one side of each film coating layer, which is opposite to the copper layer, is provided with the first surface or the second surface.

In one embodiment, the modulus of the copper layer is in the range of 0.7-3e11pa, and the modulus of the coating layer and the reinforcing layer is in the range of 1000-7000Mpa.

In one embodiment, the mechanical kms of the conductive support sheet is 0.1-1N/mm;

and/or, the conductive support piece 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.

The invention also proposes a sound generating device comprising:

the basin stand is provided with a conductive terminal which is electrically connected with an external circuit;

the magnetic circuit system is connected to the basin frame and is provided with a magnetic gap;

a vibration assembly connected to the tub and opposite to the magnetic circuit, the vibration assembly comprising the voice coil and the conductive support as set forth in any one of claims 1 to 10, the voice coil being disposed in the magnetic gap, the conductive support being connected to the conductive terminal and transmitting an electrical signal to the voice coil;

wherein, the vibration displacement of the voice coil is 1 mm-15 mm.

In an embodiment, the voice coil is of a cylindrical structure, the conductive support pieces include a plurality of conductive support pieces, the conductive support pieces are arranged at intervals in the circumferential direction of the voice coil, and the conductive support pieces are located in the same plane.

When the conductive support piece of the technical scheme is applied to the sound generating device, the conductive support piece is electrically connected with the voice coil, so that the traditional elastic wave and nylon wire structure is replaced, the structure and the assembly process of the sound generating device are effectively simplified, and the assembly efficiency is improved. Meanwhile, the conductive support piece is of a plane structure, so that occupied space of the sounding device is further reduced, and the thin development of the sounding device is facilitated.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of a conductive support sheet according to an embodiment of the present invention;

FIG. 2 is an exploded view of a conductive strip according to an embodiment of the present invention;

FIG. 3 is an exploded view of a conductive clip according to another embodiment of the present invention;

FIG. 4 is a schematic cross-sectional view of an FPCB layer according to an embodiment of the invention;

fig. 5 is a schematic cross-sectional view of an FPCB layer according to another embodiment of the present invention;

FIG. 6 is a schematic diagram of a vibration assembly according to an embodiment of the present invention;

FIG. 7 is a schematic top view of a vibration assembly according to an embodiment of the present invention;

FIG. 8 is a schematic view, partially in section, of a vibration assembly according to an embodiment of the present invention;

FIG. 9 is a schematic diagram of a conductive connector according to an embodiment of the present invention;

FIG. 10 is a schematic diagram of a sound generating apparatus according to an embodiment of the present invention;

FIG. 11 is a schematic cross-sectional view of a sound generating apparatus according to an embodiment of the present invention.

Reference numerals illustrate:

reference numerals	Name of the name	Reference numerals	Name of the name
				100	Vibration assembly	323	Third arc-shaped section
1	Voice coil	33	Outer conductive segment
				11	Hollow structure	34	FPCB layer
12	Outer surface	341	Substrate layer
				13	Welded part	342	Copper layer
2	Conductive connecting piece	343	Coating layer
				21	First connecting part	35	Reinforcing layer
22	Second connecting part	36	Adhesive layer
				23	Supporting table	400	Basin stand
3	Conductive support sheet	410	Containing cavity
				31	Inner conductive section	420	Conductive terminal
32	Intermediate conductive segment	500	Magnetic circuit system
				321	A first arc-shaped section	510	Magnetic gap
322	Second arc-shaped section	600	Sounding device

The achievement of the objects, functional features and advantages of the present invention will be further described with reference to the accompanying drawings, in conjunction with the embodiments.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

It should be noted that all directional indicators (such as up, down, left, right, front, and rear … …) in the embodiments of the present invention are merely used to explain the relative positional relationship, movement, etc. between the components in a particular posture (as shown in the drawings), and if the particular posture is changed, the directional indicator is changed accordingly.

Meanwhile, the meaning of "and/or" and/or "appearing throughout the text is to include three schemes, taking" a and/or B "as an example, including a scheme, or B scheme, or a scheme that a and B satisfy simultaneously.

Furthermore, descriptions such as those referred to as "first," "second," and the like, are provided for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implying an order of magnitude of the indicated technical features in the present disclosure. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present invention.

In the related art, the centering support piece is annular, and the annular centering support piece is arranged in a wave structure along the radial direction. Centring tabs are generally made of materials such as conex, blends, cloths, etc., limited to the above types of materials, which are difficult to make in a small Kms. In the loudspeaker, since Kms and Cms are reciprocal, when the vibration amplitude is large, the compliance Cms of the centering support is poor. This makes the resonance frequency F0 of the speaker larger. Since F0 is an important factor affecting the acoustic performance of the speaker, a larger F0 will result in poor bass sensitivity of the speaker product. Meanwhile, the loudspeaker adopting the traditional centering support piece has higher total harmonic distortion THD. Thus, the acoustic performance of the speaker is reduced, and the use feeling of the user is greatly affected.

In addition, since the material of the centering plate is generally chemical fiber, blended yarn, etc., the hardness of the centering plate is increased in a high-temperature and humid environment. This results in the easy deformation or even breakage of the centering lugs, and the fatigue performance of the centering lugs is lowered. Failure of the centering support will directly lead to failure of the speaker, significantly shortening the life of the speaker.

Meanwhile, the centering support piece cannot conduct electricity, a nylon wire is additionally arranged in the sound re-emitting device, the voice coil lead wire of the loudspeaker is guided to the external conductive terminal from the upper side of the centering support piece through the nylon wire, and the centering support piece is required to set a wire following path for the wire of the nylon wire in the processing process, so that the processing steps of the existing loudspeaker are complicated.

Based on the above conception and problems, the present invention provides a conductive support sheet 3, and it can be understood that the conductive support sheet 3 is applied to a sound generating device 600, and is used for feeding power to a voice coil of the sound generating device 600, and the sound generating device 600 can be applied to terminal devices such as a sound box, a television, an automobile, and the like.

Referring to fig. 1 to 3 and fig. 6 to 10, in the embodiment of the invention, the conductive support 3 has a strip structure and includes an inner conductive segment 31, an intermediate conductive segment 32 and an outer conductive segment 33 connected to each other, wherein the inner conductive segment 31 is connected to the voice coil 1, the intermediate conductive segment 32 extends along the circumference of the voice coil 1, the outer conductive segment 33 is connected to an external circuit, and the inner conductive segment 31, the intermediate conductive segment 32 and the outer conductive segment 33 are located on the same plane.

It will be appreciated that the voice coil 1 of the sound generating apparatus 600 is configured to be able to apply an electrical signal, and the voice coil 1 is formed by winding a wire of the voice coil 1 around a bobbin. In the present embodiment, the voice coil 1 includes a bobbin and a voice coil 1 wire provided to the bobbin. The voice coil 1 wire can be made of metal material capable of passing current. Alternatively, the frame of the voice coil 1 may be a circular cylinder, a square cylinder, a racetrack cylinder, or the like, or may be a cylinder of another shape, which is not limited herein.

It will be appreciated that the inner conductive segment 31 may be connected directly to the voice coil 1 or may be connected to the voice coil 1 by other conductive connectors, which may be sheet metal or the like.

The conductive support sheet 3 not only can realize centering action on the voice coil 1, but also can realize conductive communication between the voice coil 1 and an external circuit. By arranging the conductive support sheet 3 as a planar support sheet, on one hand, the processing is convenient, the processing steps are simplified, and on the other hand, the height space occupied by the conductive support sheet 3 is reduced, so that the thin design of the sounding device 600 is convenient. Meanwhile, the conductive support sheet 3 is provided in a long strip shape, and the middle conductive section 32 extends along the circumferential direction of the voice coil 1, so that the space occupied in the width direction of the sound generating device 600 is further reduced, and the miniaturization design of the sound generating device 600 is facilitated.

The traditional damper centering support piece, namely the damper centering support piece is of an annular structure, is sleeved on the periphery of the voice coil 1, and is arranged in a wave mode in the radial direction of the damper centering support piece, so that the processing steps are complicated, the damper centering support piece cannot be electrically connected with the voice coil 1, a nylon wire and the like are required to be additionally arranged to be connected with the voice coil 1 through leads, and the voice coil 1 is conducted with an external circuit through the nylon wire. Meanwhile, the nylon yarn is located above the elastic wave centering support piece, a line-following structure which is convenient for the nylon yarn to run needs to be arranged above the elastic wave centering support piece, and a line-following space needs to be reserved for the nylon yarn, so that the processing steps of the centering support piece are complex, and the structure of the sounding device 600 is complex.

When the conductive support sheet 3 is applied to the sound generating device 600, the conventional elastic wave centering support sheet and nylon wire structure can be replaced, so that the structure and processing steps of the sound generating device 600 are effectively simplified, and the cost is saved. Meanwhile, the sounding device 600 applying the conductive support sheet 3 of the invention does not need to reserve a line-following space for the traditional nylon yarn, can reduce the thickness of the sounding device 600, and is beneficial to the thinning design of the sounding device 600.

In this embodiment, the conductive support sheet 3 is configured as the inner conductive segment 31, the middle conductive segment 32 and the outer conductive segment 33, where the inner conductive segment 32 extends along the circumferential direction of the voice coil 1, so that the deformability of the conductive support sheet 3 is improved, the conductive support sheet 3 is effectively prevented from breaking, and the problem of stress concentration at the inner conductive segment 31 is also facilitated to be dispersed in the conductive support sheet 3.

More specifically, the intermediate conductive segment 32 includes a first arc segment 321, a second arc segment 322, and a third arc segment 323 connected in this order, the first arc segment 321 being connected with the inner conductive segment 31, the third arc segment 323 being connected with the outer conductive segment 33, the second arc segment 322 extending in the circumferential direction of the voice coil 1 from the direction of the first arc segment 321 to the third arc segment 323.

In the present embodiment, the first arc-shaped section 321, the second arc-shaped section 322 and the third arc-shaped section 323 of the middle conductive section 32 are integrally formed. The first arcuate segment 321 is connected to the inner conductive segment 31 for guiding the intermediate conductive segment 32 from adjacent the outer surface 12 of the voice coil 1 to away from the outer surface 12 of the voice coil 1. That is, the first arc-shaped section 321 is led from the inner conductive section 31 perpendicular to the outer surface 12 of the voice coil 1 to be away from the outer surface 12 and is nearly parallel to the outer surface 12, and the first arc-shaped section 321 is bent toward the second arc-shaped section 322.

It will be appreciated that the direction of extension of the second arcuate segment 322 is approximately coincident with the circumferential direction of the outer surface 12 of the voice coil 1.

It should be noted that, the arc length of the second arc-shaped section 322 is greater than that of the first arc-shaped section 321, so that the stress of the first arc-shaped section 321 and the inner conductive section 31 can be dispersed by effectively using the second arc-shaped section 322, and the deformability of the second arc-shaped section 322 is effectively improved.

Alternatively, the centers of curvature of the first and second

arcuate segments

321 and 322 are located on opposite sides of the second arcuate segment 322 from the center of curvature of the third arcuate segment 323. This facilitates connection of the conductive support 3 to the voice coil 1 through the inner conductive segment 31 and connection to the outer conductive terminal by the outer conductive segment 33.

In one embodiment, the first arcuate segment 321 has a rotation angle greater than 90 ° and the second arcuate segment 322 has a rotation angle less than 90 °. The arrangement can effectively utilize the second arc-shaped section 322 to disperse the stress of the first arc-shaped section 321, so as to avoid the first arc-shaped section 321 from breaking.

In one embodiment, the width of the inner conductive segment 31 of the conductive strip 3 may be selected to be 1mm to 3mm. Alternatively, the width of the inner conductive segment 31 is 1mm, 1.5mm, 2mm, 2.5mm, 3mm, etc., without limitation. It is understood that by setting the width of the inner conductive segment 31 in the range of 1mm to 3mm, both the connection stability of the conductive branch piece 3 and the conductive smoothness can be ensured.

Alternatively, the width of the intermediate conductive segment 32 of the conductive strip 3 is 1mm to 3mm. Alternatively, the width of the intermediate conductive segments 32 is 1mm, 1.5mm, 2mm, 2.5mm, 3mm, etc., without limitation. In the present embodiment, the width of the middle conductive segment 32 may be the same as the width of the inner conductive segment 31; alternatively, the width of the middle conductive segment 32 is different from the width of the inner conductive segment 31.

Alternatively, the width of the intermediate conductive segment 32 is smaller than the width of the inner conductive segment 31, so that the intermediate conductive segment 32 can be utilized to disperse and reduce stress concentration of the inner conductive segment 31, while the deformability of the intermediate conductive segment 32 can be improved.

In the present embodiment, the first arc-shaped section 321, the second arc-shaped section 322 and the third arc-shaped section 323 of the middle conductive section 32 may be of equal width, i.e. 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.

Of course, the first arc-shaped section 321, the second arc-shaped section 322 and the third arc-shaped section 323 of the middle conductive section 32 may be different in width.

In one embodiment, the width of the first arc-shaped section 321 decreases gradually from the inner conductive section 31 to the second arc-shaped section 322, the width of the second arc-shaped section 322 decreases gradually from the first arc-shaped section 321 to the third arc-shaped section 323, and the width of the third arc-shaped section 323 increases gradually from the second arc-shaped section 322 to away from the second arc-shaped section 322.

In another embodiment, the width of the first arc-shaped section 321 is uniform from the inner conductive 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 distance from the second arc-shaped section 322.

In yet another embodiment, the width of the first arc-shaped section 321 is uniform from the inner conductive section 31 to the second arc-shaped section 322, the width of the second arc-shaped section 322 decreases from the first arc-shaped section 321 to the third arc-shaped section 323 and increases from the second arc-shaped section 322 to the third arc-shaped section 323, and the width of the third arc-shaped section 323 increases gradually from the second arc-shaped section 322 to the second arc-shaped section 322.

It will be appreciated that the inner conductive segment 31, the middle conductive segment 32 and the outer conductive segment 33 of the conductive strip 3 lie in the same plane, and that the width of the inner conductive segment 31 and the width of the middle conductive segment 32 each refer to a width perpendicular to the extending direction thereof in that plane.

Optionally, the thickness of the conductive support sheet 3 is 0.3 mm-1 mm. The thickness of the conductive support sheet 3 is 0.3mm, 0.5mm, 0.8mm, 1mm and the like, and the arrangement can ensure that the conductive support sheet 3 has certain hardness and ensures the centering effect of the conductive support sheet 3 on the voice coil 1. It will be appreciated that the thickness of the conductive support 3 applied to the large horn speaker is greater than the thickness of the conductive support 3 in the micro speaker.

It should be noted that, the hardness and centering ability of the planar support sheet used in the micro-speaker in the prior art cannot meet the requirement of the large-horn speaker, so the centering support sheet in the large-horn speaker generally adopts elastic waves. According to the loudspeaker, the conductive support piece 3 is improved and verified in material and shape, and finally the conductive support piece 3 can be applied to a loudspeaker.

In this embodiment, in order to enable the conductive support sheet 3 to achieve the hardness requirement and the compliance requirement, as shown in fig. 2 to 5, the conductive support sheet 3 includes an FPCB layer 34 and a reinforcing layer 35, where the FPCB layer 34 has a first surface and a second surface facing away from each other, and the reinforcing layer 35 is adhered to the first surface and/or the second surface through an adhesive layer 36.

As shown in fig. 2, the reinforcing layer 35 includes a layer, that is, the reinforcing layer 35 is adhered to the first surface or the second surface of the FPCB layer 34 through a glue layer 36. As shown in fig. 3, the reinforcing layer 35 includes two layers, that is, the two reinforcing layers 35 are respectively adhered to the first surface and the second surface of the FPCB layer 34 through adhesive layers 36. Optionally, the material of the stiffening layer 35 is at least one of PI, PEN, PET, PEI.

It is understood that, when the first surface and the second surface of the FPCB layer 34 are each provided with the reinforcing layer 35, the materials of the reinforcing layers 35 on the first surface and the second surface may be the same or different. Further, in both end regions of the conductive support sheet 3, the outer shapes of the reinforcing layer 35 on the first surface and the reinforcing layer 35 on the second surface do not overlap. That is, the outer shapes of the reinforcing layer 35 of the first surface and the reinforcing layer 35 of the second surface do not coincide at the end near the inner conductive segment 31, or the outer shapes of the reinforcing layer 35 of the first surface and the reinforcing layer 35 of the second surface do not coincide at the end near the outer conductive segment 33, or the outer shapes of the reinforcing layer 35 of the first surface and the reinforcing layer 35 of the second surface do not coincide at the end near the inner conductive segment 31 and the end near the outer conductive segment 33. Therefore, the stress concentration of the conductive support sheet 3 can be avoided, and the risk that the conductive support sheet 3 breaks and fails due to the concentration and repeated stress at a certain point in the working process is effectively avoided.

Optionally, the glue layer 36 is a thermosetting glue or an acrylic glue. It will be appreciated that in the selection of the glue layer 36 that bonds the FPCB layer 34 and the stiffening layer 35, the thermosetting glue may improve the adhesion of the FPCB layer 34 to the stiffening layer 35; the acrylic adhesive has certain damping, and the resonance energy of the conductive support sheet 3 is absorbed by the acrylic adhesive, so that the resonance of the voice coil 1 is reduced; further, the reinforcing layer 35 and the FPCB layer 34 have moment, and the conductive support sheet 3 has large elongation at break and is not easily cracked. The acrylic adhesive may be acrylic adhesive, which is not limited herein.

In this embodiment, the dissipation factor of the adhesive layer 36 is 0-1.5, and the dissipation factor of the adhesive layer 36 is in the range of 0-1.5, so that the damping performance of the adhesive layer 36 can be improved, the performance of the conductive support sheet 3 can be further improved, the resonance of the sound generating device 600 can be reduced, and the acoustic performance of the sound generating device 600 can be improved.

Alternatively, the dissipation factor of the glue layer 36 may 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, without limitation herein.

Further, the thickness of the glue layer 36 may be selected to be 0.015mm to 0.1mm. Alternatively, the thickness of the glue layer 36 is 0.015mm, 0.03mm, 0.05mm, 0.08mm, 0.1mm, etc., without limitation. The die storage energy of the adhesive layer 36 is 0-2Mpa, so that the conductive support sheet 3 has better compliance, the deformation resistance of the conductive support sheet 3 is improved, and the centering performance of the conductive support sheet is improved.

In the present embodiment, the thickness of the stiffening layer 35 may be selected to be 0.1mm to 0.5mm. The thickness of the stiffening layer 35 is 0.1mm, 0.2mm, 0.3mm, 0.4mm, 0.5mm. So that the strength of the conductive support sheet 3 can be ensured, and the centering capability of the conductive support sheet 3 is enhanced. The thickness of the glue layer 36 may be selected to be 0.015mm to 0.1mm. Alternatively, the thickness of the glue layer 36 is 0.015mm, 0.03mm, 0.05mm, 0.08mm, 0.1mm, etc. This reduces product resonance.

In one embodiment, as shown in fig. 2, the FPCB layer 34 includes a substrate layer 341, a copper layer 342 and a film layer 343 sequentially stacked, wherein a first surface is formed on a side of the substrate layer 341 facing away from the copper layer 342, and a second surface is formed on a side of the film layer 343 facing away from the copper layer 342. It is understood that the FPCB layer 34 has a single copper layer 342.

In another embodiment, as shown in fig. 3, the FPCB layer 34 includes a substrate layer 341, two copper layers 342 and two coating layers 343, the substrate layer 341 is sandwiched between the two copper layers 342, each coating layer 343 is disposed on a side of each copper layer 342 facing away from the substrate layer 341, and a side of the coating layer 343 facing away from the copper layer 342 forms a first surface or a second surface. It is understood that the FPCB layer 34 has a double copper layer 342.

It will be appreciated that in order to reduce the cost of the product or to improve the overall performance of the conductive support sheet 3. For the FPCB layer 34 having the double copper layer 342, one side of the capping layer 343 may be optionally removed and replaced with the stiffening layer 35. By the arrangement, the strength of the conductive support sheet 3 can be increased, the centering capability of the conductive support sheet 3 is enhanced, the resonance of a product is reduced, and the cost can be reduced. Needless to say, the reinforcing layer 35 may be directly attached to the side coating layer 343, and is not limited thereto.

In the above embodiment, the modulus of the copper layer 342 ranges from 0.7 to 3e11pa, and the modulus of the coating layer 343 and the reinforcing layer 35 ranges from 1000 to 7000Mpa. The conductive support sheet 3 within the modulus range has good compliance and deformation resistance, and meets the centering requirement of the sound generating device 600.

In one embodiment, the conductive support has a mechanical kms of 0.1-1N/mm. Specifically, the mechanical stiffness Kms of the conductive sheet 3 may be 0.1N/mm, 0.2N/mm, 0.3N/mm, 0.4N/mm, 0.5N/mm, 0.6N/mm, 0.7N/mm, 0.8N/mm, 0.9N/mm, 1N/mm, etc. In this range, the linearity of the conductive support piece 3 is good, so that it is ensured that the conductive support piece 3 not only can provide enough buffering for the voice coil 1 of the sound generating device 600, but also can not generate plastic deformation to cause damage when the sound generating device 600 vibrates with larger displacement.

In the present embodiment, the voice coil 1 may be selected to be cylindrical. The voice coil 1 has a hollow structure 11, and the hollow structure 11 may be a hollow cavity, that is, both ends of the hollow structure 11 have openings, which 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 towards the hollow structure 11. The voice coil 1 also has end portions at both ends.

In order to facilitate connection of the voice coil 1 with the planar conductive support 3 and improve connection stability and conductive smoothness, in this embodiment, the outer surface 12 of the voice coil 1 is provided with a conductive connection member 2. It will be appreciated that the conductive connecting member 2 may be integrally formed on the outer surface 12 of the voice coil 1, so as to improve the connection stability and conductive smoothness between the voice coil 1 and the conductive connecting member 2. Of course, the conductive connector 2 and the voice coil 1 may be separately provided, and the conductive connector 2 may be fixed to the outer surface 12 of the voice coil 1 by welding or bonding, and the present invention is not limited thereto.

Alternatively, the outer surface 12 of the voice coil 1 is provided with a soldering portion 13 corresponding to the conductive connecting member 2, and the conductive connecting member 2 is fixedly connected with the soldering portion 13.

In one embodiment, the conductive connecting member 2 includes a first connecting portion 21 and a second connecting portion 22 disposed at an angle, the first connecting portion 21 being connected to the outer surface 12, and the second connecting portion 22 being connected to the inner conductive segment 31.

In this embodiment, as shown in fig. 6 to 11, the conductive connecting piece 2 is disposed as the first connecting portion 21 and the second connecting portion 22 disposed at an included angle, so that the conductive connecting piece 2 is conveniently connected with the outer surface 12 through the first connecting portion 21, so as to increase the contact area, 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, so as to be conveniently connected with the conductive supporting piece 3. Alternatively, the first connection portion 21 and the second connection portion 22 are disposed vertically.

Alternatively, the width of the second connection portion 22 is larger than the width of the first connection portion 21. The arrangement can effectively enlarge the connection area of the second connection part 22 and the conductive support sheet 3 so as to improve the connection stability. Meanwhile, the width of the first connecting portion 21 is reduced, so that the vibration conducting strip 3 can be applied to the sound generating device 600, the avoidance space of the magnetic circuit system 500 can be reduced, and the magnetic flux utilization rate is increased.

Alternatively, the width of the first connection portion 21 gradually decreases from an end adjacent to the second connection portion 22 to an end distant from the second connection portion 22.

In the present embodiment, the width of the second connection portion 22 is the same as the width of the inner conductive segment 31. In order to facilitate connection of the conductive connecting member 2 to the outer surface 12 of the voice coil 1 and to improve connection stability, the outer surface 12 is provided with a soldering portion 13 corresponding to the conductive connecting member 2, and the first connecting portion 21 is soldered to the soldering portion 13.

Optionally, the conductive connecting piece 2 is a metal sheet, so that the conductive supporting piece 3 is convenient to realize conductive connection with the voice coil 1 through the conductive connecting piece 2. In this embodiment, the thickness of the conductive connector 2 may be selected to be 0.1mm to 0.5mm. Alternatively, the thickness of the conductive connection member 2 is 0.1mm, 0.2mm, 0.3mm, 0.4mm, 0.5mm, etc., without limitation.

In an embodiment, as shown in fig. 6 to 10, an end of the second connecting portion 22 away from the first connecting portion 21 is bent towards a direction away from the first connecting portion 21 to form a supporting platform 23, and the supporting platform 23 is supported on an end of the middle conductive segment 32 adjacent to the inner conductive segment 31. It can be appreciated that by providing the supporting stand 23, the contact area between the conductive connecting member 2 and the conductive supporting sheet 3 is increased, so as to improve the connection stability.

In another embodiment, an end of the second connecting portion 22 away from the first connecting portion 21 is bent toward the side of the inner conductive segment 31 to form a flange, and the flange and the second connecting portion 22 enclose to form a mounting groove, in which the inner conductive segment 31 is accommodated and limited. The arrangement can improve the connection stability of the conductive connecting piece 2 and the conductive supporting piece 3.

In a further embodiment, the end of the second connection portion 22 remote from the first connection portion 21 is provided with a soldering hole for soldering the second connection portion 22 to the inner conductive segment 31. The arrangement can further enhance the connection stability of the conductive connecting piece 2 and the conductive supporting piece 3.

As shown in fig. 10 and 11, the present invention further provides a sound generating device 600, where the sound generating device 600 includes a basin frame 400, a magnetic circuit system 500, and a vibration assembly 100, the vibration assembly 100 adopts the conductive support sheet 3, and the specific structure of the conductive support sheet 3 refers to the foregoing embodiment, and since the sound generating device 600 adopts all the technical solutions of all the foregoing embodiments, at least all the beneficial effects brought by the technical solutions of the foregoing embodiments are provided.

In this embodiment, as shown in fig. 10 and 11, the frame 400 has a cavity 410, the frame 400 is provided with a conductive terminal 420, the conductive terminal 420 is connected with an external circuit, the magnetic circuit 500 is connected to one end of the frame 400, the magnetic circuit 500 is provided with a magnetic gap 510, the vibration assembly 100 is connected to the other end of the frame 400 and opposite to the magnetic circuit 500, the voice coil 1 of the vibration assembly 100 is suspended in the magnetic gap 510, and one end of the conductive support 3, which is far away from the voice coil 1, is connected with the conductive terminal 420 so as to transmit an electrical signal to the voice coil 1 through the conductive support 3; wherein, the vibration displacement of the voice coil 1 is 1 mm-15 mm.

In the micro-speaker, the vibration displacement of the voice coil 1 is less than 1mm. In a large horn speaker, the vibration displacement of the voice coil 1 is greater than 1mm. In this embodiment, the vibration displacement of the voice coil 1 may be selected to be 1mm to 15mm, that is, the sound generating apparatus 600 is a large horn speaker. 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, or the like, without limitation. The vibration displacement of the voice coil 1 refers to stable displacement during normal operation of the voice coil device 600, and does not include a case where the displacement of the voice coil 1 is suddenly changed when the voice coil 1 receives an abnormal current or other abnormal conditions occur in the voice coil device 600.

In one embodiment, the voice coil 1 is arranged in a cylindrical shape, and the diameter of the voice coil 1 can be selected to be 14 mm-28 mm. When the sound generating apparatus 600 has a large horn structure, the voice coil 1 has 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., without limitation.

In this embodiment, the conductive support pieces 3 include a plurality of conductive support pieces 3 arranged at intervals along the circumferential direction of the voice coil 1, and the plurality of conductive support pieces 3 are located in the same plane. Specifically, the plurality of conductive support pieces 3 are equally spaced apart in the circumferential direction of the voice coil 1, and the plurality of intermediate conductive segments 32 of the plurality of conductive support pieces 3 extend in the same direction in the circumferential direction of the voice coil 1. It will be appreciated that such an arrangement not only improves the centering effect of the conductive support 3 on the voice coil 1, but also helps to avoid interference of the intermediate conductive segments 32 with adjacent conductive support 3. Meanwhile, the plurality of conductive support pieces 3 are arranged in the same plane, so that the space occupied by the plurality of conductive support pieces 3 in the height direction is further reduced, and the thinning development of the sound generating device 600 is facilitated.

The foregoing description is only of the optional embodiments of the present invention, and is not intended to limit the scope of the invention, and all equivalent structural modifications made by the present description and accompanying drawings or direct/indirect application in other related technical fields are included in the scope of the present invention.

Claims

1. The conductive support sheet is used for feeding electricity to a voice coil of the sounding device and is of a strip-shaped structure, and comprises an inner conductive section, a middle conductive section and an outer conductive section which are connected, wherein the inner conductive section is connected with the voice coil, the middle conductive section extends along the circumferential direction of the voice coil, the outer conductive section is connected with an external circuit, and the inner conductive section, the middle conductive section and the outer conductive section are located on the same plane.

2. The conductive clip of claim 1, wherein the intermediate conductive segment comprises a first arcuate segment, a second arcuate segment, and a third arcuate segment connected in sequence, the first arcuate segment being connected to the inner conductive segment, the third arcuate segment being connected to the outer conductive segment, the second arcuate segment extending in a direction from the first arcuate segment to the third arcuate segment along a circumference of the voice coil.

3. The conductive clip of claim 2, wherein centers of curvature of the first and second arcuate segments and the third arcuate segment are on opposite sides of the second arcuate segment;

4. The conductive clip of claim 2, wherein the width of the first arcuate segment decreases gradually from the inner conductive segment to the second arcuate segment, the width of the second arcuate segment decreases gradually from the first arcuate segment to the third arcuate segment, and the width of the third arcuate segment increases gradually from the second arcuate segment to the outer conductive segment;

5. The conductive clip of claim 1, wherein the inner conductive segment has a width of 1mm to 3mm;

and/or the width of the middle conductive section is 1 mm-3 mm;

and/or the thickness of the conductive supporting sheet is 0.3 mm-1 mm.

6. The conductive clip of claim 1, wherein the conductive clip comprises:

an FPCB layer having first and second surfaces facing away from each other; and

7. The conductive sheet of claim 6, wherein the glue layer is a thermoset glue or a damping glue;

and/or the thickness of the reinforcing layer is 0.1 mm-0.5 mm;

and/or the thickness of the adhesive layer is 0.015 mm-0.1 mm.

8. The conductive support sheet according to claim 6, wherein the FPCB layer comprises a base material layer, a copper layer and a film layer which are sequentially stacked, the base material layer forms the first surface on a side facing away from the copper layer, and the film layer forms the second surface on a side facing away from the copper layer;

9. The conductive sheet according to claim 8, wherein the modulus of the copper layer is in the range of 0.7-3e11pa, and the modulus of the coating layer and the reinforcing layer is in the range of 1000-7000Mpa.

10. The conductive sheet according to any one of claims 1 to 9, wherein the conductive sheet has a mechanical kms of 0.1-1N/mm;

11. A sound emitting device, the sound emitting device comprising:

wherein, the vibration displacement of the voice coil is 1 mm-15 mm.

12. The sound generating apparatus of claim 11, wherein the voice coil is of a cylindrical structure, the conductive support pieces comprise a plurality of conductive support pieces, the plurality of conductive support pieces are arranged at intervals in the circumferential direction of the voice coil, and the plurality of conductive support pieces are located in the same plane.