Application Device

Abstract

The present invention discloses an application device, comprising a plurality of spring sheets, each of which is a non-wound narrow and long structure, and each spring sheet includes a first connecting portion, a second connecting portion, and a deforming portion connected therebetween, the first connecting portion and the second connecting portion being connected to a first component and a second component respectively, and the first component and the second component can move relative to each other along a first direction or be relatively stationary; in each spring sheet, the first connecting portion, the deforming portion, and the second connecting portion are located in different planes; the plurality of spring sheets are arranged at intervals along the circumference of the first component, and in any two adjacent spring sheets, the two first connecting portions are arranged along the first direction and in opposite directions, the two deforming portions are both arc-shaped structures protruding along the first direction and in opposite directions, the two deforming portions extend along the circumference of the first component and in the same direction, and the two second connecting portions are arranged along the second direction and in the same direction. The present invention has low magnetic flux leakage, good centering ability, and good vibration consistency.

Description

Technical Field

[0001] The present invention relates to the field of electroacoustic technology, and in particular to a spring and an application device thereof. Background Art

[0002] Application devices, such as speakers, are important acoustic components in electronic devices. They are transducers that convert electrical signals into acoustic signals. With the continuous advancement and innovation of technology, the structural design of traditional speakers is also constantly seeking innovation and change. They must not only meet the trend of thinning, but also focus on optimizing performance, while also taking into account process simplification and cost control.

[0003] To address the current issue of centering arms affecting voice coil vibration and prone to breakage, the applicant has proposed a planar spring, such as the elastic component and application device disclosed in application number 202010458489.2. This planar spring design not only increases fatigue strength and reduces the risk of breakage, but also minimizes impact on the vibration of the oscillating element, optimizing product performance. However, the planar spring design has a large span in the circumferential direction of the voice coil. The narrow, long winding structure of the planar spring increases the overall dimensions of the planar spring. Both the yoke and the bracket require slots to accommodate the planar spring. The large dimensions of the planar spring result in a single yoke slot angle of 30° to 45°, with the total angle of all slots accounting for 33% to 50% of the yoke circumference. This excessive slot ratio can result in yoke magnetic flux leakage as high as 9% to 15%, resulting in low magnet utilization. Compensating for this leakage typically requires a larger yoke, leading to higher costs. Furthermore, planar springs are prone to high resonance intensity. In addition, the design of multiple planar springs in the application device often easily causes different forces at different positions of the vibration unit, resulting in inconsistent vibrations at different positions, affecting product performance. Summary of the Invention

[0004] The main purpose of the present invention is to propose a spring and an application device, aiming to solve the problem in the prior art that the planar spring causes large magnetic leakage and high resonance intensity of the application device, and to solve the problem that inconsistent vibration of the vibration unit affects product performance.

[0005] To achieve the above objectives, the present invention provides an application device, comprising a plurality of spring pieces, each of which has a non-wound, narrow and long structure, and each of which includes a first connecting portion, a second connecting portion, and a deformable portion connected between the first connecting portion and the second connecting portion, wherein the first connecting portion and the second connecting portion are respectively connected to a first component and a second component, and the first component and the second component can move relative to each other in a first direction, or the first component and the second component are relatively stationary; in each of the spring pieces, the first connecting portion, the deformable portion, and the second connecting portion are located in different planes;

[0006] Multiple spring pieces are arranged at intervals along the circumference of the first component, and in any two adjacent spring pieces, the two first connecting parts are arranged along the first direction and in opposite directions, the two deforming parts are both arc-shaped structures protruding along the first direction and the protruding directions are opposite, the two deforming parts extend along the circumference of the first component and the extension directions are consistent, the two second connecting parts are arranged along the second direction and the extension directions are consistent, and the first direction is inconsistent with the second direction.

[0007] Optionally, the application device includes two spring sheet groups, each of which includes two spring sheets; the spring sheets of the two spring sheet groups are alternately distributed along the circumference of the first component, and the four spring sheets are evenly distributed.

[0008] Optionally, the two spring pieces of the same spring piece group are rotationally symmetrical about the center of the first component.

[0009] Optionally, among any two adjacent elastic sheets, the symmetrical structure of one of the elastic sheets with respect to a reference plane is consistent with the structure of the other elastic sheet, wherein the reference plane is a plane arranged perpendicular to the first direction.

[0010] Optionally, projection areas of any two adjacent elastic sheets vertically projected onto the first component at least partially overlap.

[0011] Optionally, the deformation portion is composed of arc segments and / or straight line segments.

[0012] Optionally, the deformation portion includes at least two arc segments; on a plane arranged along the second direction, the radii of at least two arc segments are the same or the radii of at least two arc segments are different.

[0013] Optionally, the deformation portion includes three arc segments, and the radii of the three arc segments are different.

[0014] Optionally, the radii of the three arc segments increase sequentially from the first connecting portion to the second connecting portion.

[0015] Optionally, among the three arc segments, the arc segment arranged close to the first connecting portion is the first arc segment, and the arc segment arranged close to the second connecting portion is the second arc segment, the radius of the first arc segment is R1, and the radius of the second arc segment is R2, wherein 0.8≤R1 / R2≤1.3.

[0016] Optionally, both the first arc segment and the second arc segment bulge along the first direction, and the center of the first arc segment and the center of the second arc segment are located in the same plane.

[0017] Optionally, the other arc segment is a third arc segment, the third arc segment is located between the first arc segment and the second arc segment, and the first end and the second end of the third arc segment are respectively connected to the first arc segment and the second arc segment, wherein the first end of the third arc segment and the second end of the third arc segment are located in different planes.

[0018] Optionally, at least a portion of the structure in the third arc segment extends along the second direction, and a distance between the first end of the third arc segment and the second end of the third arc segment along the first direction is 0 to 2.5 mm.

[0019] Optionally, the first direction and the second direction are perpendicular to each other.

[0020] Optionally, the thickness of the spring piece is 0.1 mm to 0.5 mm; and / or the width of the spring piece is 1.5 mm to 4 mm.

[0021] Optionally, the shrapnel is made of any one of phosphor bronze, iron, steel or alloy materials.

[0022] Optionally, the application device includes a vibration unit, and the elastic piece is used to balance the vibration of the vibration unit along the first direction.

[0023] Optionally, the application device is a sound-generating device, the sound-generating device includes a bracket, the vibration unit includes a diaphragm and a voice coil connected to the diaphragm; the first connecting portion is connected to the voice coil, and the second connecting portion is connected to the bracket;

[0024] Alternatively, the vibration unit includes a diaphragm, a voice coil, and a drag cup, the voice coil and the drag cup are connected to the same side of the diaphragm, the first connecting portion is connected to the drag cup, the second connecting portion is connected to the bracket, and the vibration displacement of the voice coil is 1 mm to 15 mm;

[0025] And / or, the bracket is a housing or a magnetic yoke.

[0026] Optionally, the bracket is a shell, the yoke is located between the shell and the voice coil, and the yoke is provided with an avoidance groove for the corresponding deformation part to pass through at a position corresponding to each elastic piece.

[0027] Optionally, the plurality of avoidance grooves are spaced apart along the circumference of the magnetic yoke, and the sum of the circumferential angles of the plurality of avoidance grooves along the magnetic yoke accounts for 15% to 35% of the total circumferential angle of the magnetic yoke.

[0028] Optionally, the application device is a sound-generating device, a motor or a multifunctional vibration device.

[0029] Compared with the planar spring, the spring piece of the present invention has a non-wound narrow and long structure, so that the spring piece is a single-wire structure with a narrow and long size, and does not have a large span in the circumferential direction of the voice coil. Accordingly, the slot angle and size of the avoidance groove opened on the yoke to avoid the deformation part of the spring piece are also smaller. The smaller the slot, the less magnetic leakage, the higher the utilization rate of the yoke, the smaller the size of the yoke, and the lower the cost.

[0030] Furthermore, because the first connecting portion of the shrapnel of the present invention is arranged along the first direction and the deforming portion is raised along the first direction, the first connecting portion and the deforming portion are not affected by the vertical vibration of the vibration unit. Therefore, this partial structure will not be pulled by the rotational force, has good fatigue resistance, and is less likely to cause the solder joints between the shrapnel and the voice coil to break or fall off, thereby ensuring the assembly effectiveness and high reliability between the shrapnel and the voice coil. Furthermore, the deforming portion extends along the circumference of the voice coil, which can reduce the stress concentration of the deforming portion, increase fatigue strength, and reduce the risk of shrapnel breakage. Since the deforming portion is an arc-shaped structure raised along the first direction, when the shrapnel follows the displacement of the vibration unit in the first direction, even when the vibration displacement of the vibration unit is large, the deforming portion can effectively suppress the resonance intensity of the shrapnel and avoid the risk of breakage. The compliance of the shrapnel is also well maintained, which can provide sufficient displacement without affecting the vibration of the vibration unit, thereby optimizing product performance. At the same time, the spring clip also constrains the reciprocating vibration of the vibration unit based on the vibration offset state of the vibration unit through the elastic deformation of its deformable portion, preventing polarization of the vibration unit, making the reciprocating vibration of the vibration unit more stable and providing better centering capability. The second connecting portion arranged along the second direction not only facilitates connection with the bracket but also increases the contact area between the second connecting portion and the bracket solder pad. Furthermore, because the deformable portion extends circumferentially along the voice coil, it suppresses the rotational force exerted on the spring clip during vibration, improving fatigue resistance and preventing the solder pads between the spring clip and the bracket from breaking or falling off, thus ensuring effective and reliable assembly between the spring clip and the bracket.

[0031] In any two adjacent spring pieces of the application device of the present invention, the two first connecting parts are arranged in opposite directions, the two deformation parts extend in the same direction and have opposite protrusion directions, and the two second connecting parts extend in the same direction. Such an arrangement makes the elastic forces of any two adjacent spring pieces relatively symmetrical when the vibration unit vibrates, so that any two adjacent points in the vibration unit can obtain relatively symmetrical elastic forces and can offset each other, and then when the vibration unit vibrates vertically, different circumferential positions of the vibration unit obtain relatively symmetrical and mutually offset restoring forces when vibrating upward or downward, thereby achieving consistency in the vibration of the vibration unit, better compliance, and improving product performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0033] Figure 1 This is an exploded schematic diagram of an application device according to an embodiment of the present invention;

[0034] Figure 2 A schematic cross-sectional view of an application device according to an embodiment of the present invention;

[0035] Figure 3 A three-dimensional schematic diagram of a voice coil, a spring, and a magnetic circuit system in an application device according to an embodiment of the present invention;

[0036] Figure 4 A schematic cross-sectional view of an application device according to another embodiment of the present invention;

[0037] Figure 5 A three-dimensional schematic diagram of a spring in an application device according to an embodiment of the present invention;

[0038] Figure 6 A schematic side view of a spring in an application device according to an embodiment of the present invention;

[0039] Figure 7 Schematic top view of a spring in an application device according to an embodiment of the present invention;

[0040] Figure 8 A schematic diagram of the invention's spring element suppressing resonance intensity;

[0041] Figure 9 This is a schematic diagram of the planar spring suppressing resonance intensity disclosed in application number 202010458489.2.

[0042] Description of Figure Numbers:

[0043] Label name Label name 10 shrapnel 30 Shrapnel group 10a First Shrapnel 40 Vibration unit 10b Second shrapnel 50 Magnetic circuit system 11 First connecting part 51 Magnetic gap 12 Second connecting part 52 yoke 13 Deformation part 521 avoidance groove 130 Arc segment 60 diaphragm 131 First arc segment 70 bracket 132 The second arc segment 80 Drag Cup 133 The third arc segment 100 Application Device 20 voice coil

[0044] The purpose, features and advantages of the present invention will be further described with reference to the accompanying drawings and in conjunction with the embodiments. DETAILED DESCRIPTION

[0045] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0046] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications will also change accordingly.

[0047] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features specified as "first" and "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions between the various embodiments can be combined with each other, but this must be based on the fact that ordinary technicians in this field can implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0048] The present invention provides an application device 100 .

[0049] like Figures 1 to 7 As shown, the present invention further proposes an application device 100 including a plurality of spring pieces 10, each spring piece 10 being a non-wound narrow and long structure, and each spring piece 10 including a first connecting portion 11, a second connecting portion 12, and a deformable portion 13 connected between the first connecting portion 11 and the second connecting portion 12, the first connecting portion 11 and the second connecting portion 12 being connected to a first component and a second component respectively, the first component and the second component can move relative to each other along a first direction, or the first component and the second component are relatively stationary; in each spring piece 10, the first connecting portion 11, the deformable portion 13, and the second connecting portion 12 are located in different planes;

[0050] Multiple spring pieces 10 are arranged at intervals along the circumference of the first component, and in any two adjacent spring pieces 10, the two first connecting parts 11 are arranged along the first direction and in opposite directions, the two deformation parts 13 are both arc-shaped structures protruding along the first direction and the protruding directions are opposite, the two deformation parts 13 extend along the circumference of the first component and the extension directions are consistent, the two second connecting parts 12 are arranged along the second direction and the extension directions are consistent, and the first direction is inconsistent with the second direction.

[0051] Specifically, if Figures 1 to 7 As shown, the spring piece 10 is a non-wound narrow and long structure, including a first connecting part 11, a second connecting part 12 and a deformation part 13 connected between the first connecting part 11 and the second connecting part 12. The first connecting part 11 and the second connecting part 12 are respectively connected to the first component and the second component. The first component and the second component can move relative to each other along the first direction, or the first component and the second component are relatively stationary; the first connecting part 11, the deformation part 13 and the second connecting part 12 are located in different planes, and the first connecting part 11 is arranged along the first direction, the second connecting part 12 is arranged along the second direction, the first direction is inconsistent with the second direction, the deformation part 13 is an arc-shaped structure convex along the first direction, and the deformation part 13 extends along the circumference of the first component.

[0052] like Figures 1 to 4 As shown, the shrapnel 10 of this embodiment is applied to an application device 100 such as a sound-generating device, a motor, or a multi-functional vibration device. This embodiment is described using the shrapnel 10 applied to a sound-generating device as an example. The sound-generating device includes the shrapnel 10 and a vibration unit 40. The shrapnel 10 is used to balance the vibration of the vibration unit 40 along a first direction. The sound-generating device also includes a bracket 70. In one embodiment, the vibration unit 40 includes a diaphragm 60 and a voice coil 20 connected to the diaphragm 60. The first connecting portion 11 of the shrapnel 10 is connected to the voice coil 20, and the second connecting portion 12 is connected to the bracket 70. The bracket 70 is / are a housing or a yoke 52. In another embodiment, the vibration unit 40 includes a diaphragm 60, a voice coil 20, and a drag cup 80. The voice coil 20 and the drag cup 80 are connected to the same side of the diaphragm 60. The first connecting portion 11 is connected to the drag cup 80, and the second connecting portion 12 is connected to the bracket 70. The bracket 70 is / are a housing or a yoke 52.

[0053] It is understood that when an electrical signal is applied, the vibration unit 40 can vibrate vertically within the housing. The vibration direction of the vibration unit 40 is represented by the vertical direction or the vertical direction, and the direction perpendicular to the vibration of the vibration unit 40 is represented by the horizontal direction. In one embodiment, the first connecting portion 11 of the spring 10 is connected to the voice coil 20. Specifically, the voice coil 20 includes a frame and a voice coil 20 wire wound around the frame. The first connecting portion 11 can be connected to the frame or the voice coil 20 wire. The second connecting portion 12 of the spring 10 is connected to the housing, facilitating assembly of the voice coil 20, spring 10, and the housing. In another embodiment, the first connecting portion 11 is connected to the drag cup 80, and the second connecting portion 12 is connected to the housing. In other embodiments, the first connecting portion 11 is connected to the drag cup 80, and the second connecting portion 12 is connected to the yoke 52, or the first connecting portion 11 is connected to the voice coil 20, and the second connecting portion 12 is connected to the yoke 52.

[0054] Specifically, in one embodiment, the application device 100 includes a vibration unit 40, a magnetic circuit system 50, and a housing that secures the vibration unit 40 and the magnetic circuit system 50. The vibration unit 40 includes a diaphragm 60 and a voice coil 20 coupled to the bottom of the diaphragm 60. The magnetic circuit system 50 includes an upper magnetic conductive plate, a magnet, and a lower magnetic conductive plate. The upper and lower magnetic conductive plates are magnetic conductive structures used to correct the magnetic lines of force generated by the magnets. The magnetic circuit system 50 forms a magnetic gap 51, and the voice coil 20 is disposed in the magnetic gap 51 of the magnetic circuit system 50. The lower magnetic conductive plate of the present invention can be a U-shaped structure, including a bottom wall and side walls. The upper magnetic conductive plate, the magnet, and the side walls of the lower magnetic conductive plate form the magnetic gap 51, forming a relatively uniform magnetic field. The voice coil 20 is disposed in the magnetic gap 51 having the relatively uniform magnetic field. The voice coil 20 is typically made of wound metal wire. When an electrical signal is connected to the voice coil 20, it vibrates up and down in the magnetic field due to the Ampere force. The vibration direction of the voice coil 20 is represented by the vertical direction or the up and down direction, and the direction perpendicular to the vibration of the voice coil 20 is represented by the horizontal direction. Since the diaphragm 60 and the voice coil 20 are fixed together by bonding or other means, the up and down vibration of the voice coil 20 in response to the electrical signal also drives the diaphragm 60 to vibrate, generating sound waves.

[0055] However, since the magnetic field in the magnetic gap 51 is only relatively uniform and not absolute, the position of the voice coil 20 will also change during the vibration of the voice coil 20, and the magnetic lines of force located on the upper side of the magnetic gap 51 are arc-shaped lines. Therefore, the Ampere force exerted on the voice coil 20 is not only in the vertical direction, but also includes Ampere forces in other directions. This makes it easy for the voice coil 20 to be polarized in a non-vertical direction during the vibration process, which further affects the vibration of the diaphragm 60.

[0056] To prevent the polarization described above, a spring 10 connecting the voice coil 20 and the bracket 70 can provide centering support for the polarization of the voice coil 20, that is, ensure that the voice coil 20 vibrates along the vibration direction within the magnetic gap 51. In one embodiment, the spring 10 is a centering support.

[0057] In one embodiment, the vibration unit 40 further includes a drag cup 80 disposed on the diaphragm 60. The drag cup 80 and the voice coil 20 are connected to the same side of the diaphragm 60. When a magnetic gap 51 is present, the drag cup 80 is located outside the magnetic gap 51. The spring 10 connecting the drag cup 80 and the bracket 70 can also provide centering support for the polarization of the voice coil 20, that is, ensure that the voice coil 20 vibrates along the vibration direction within the magnetic gap 51.

[0058] In one embodiment, the bracket 70 is a housing or a yoke 52. Since the housing can be used to support the sound-generating device unit, setting the bracket 70 as a housing can facilitate fixing the side of the spring 10 away from the vibration unit 40, thereby improving the centering and supporting effect of the spring 10. Since most of the vibration unit 40 is close to the magnetic gap 51 and is relatively close to the yoke 52, connecting the side of the spring 10 away from the vibration unit 40 to the yoke 52 can save the installation distance of the spring 10 and facilitate improving the centering and supporting effect of the spring 10. It should be noted that, as described above, the fixing methods of the spring clip 10 in this embodiment include multiple combinations: the first connecting portion 11 and the second connecting portion 12 of the spring clip 10 are respectively connected to the voice coil 20 and the housing, or the first connecting portion 11 and the second connecting portion 12 of the spring clip 10 are respectively connected to the voice coil 20 and the yoke 52, or the first connecting portion 11 and the second connecting portion 12 of the spring clip 10 are respectively connected to the drag cup 80 and the housing, or the first connecting portion 11 and the second connecting portion 12 of the spring clip 10 are respectively connected to the drag cup 80 and the yoke 52, all of which can better ensure the centering support effect of the spring clip 10.

[0059] In the spring piece 10 of this embodiment, the first connecting portion 11, the deformable portion 13 and the second connecting portion 12 are located in different planes, and the first connecting portion 11 is arranged along the first direction, and the second connecting portion 12 is arranged along the second direction. The first direction is inconsistent with the second direction, and the deformable portion 13 is an arc-shaped structure protruding along the first direction, and the deformable portion 13 extends along the circumference of the first component.

[0060] Specifically, the first direction is an up-down direction, expressed as a vertical direction or an up-down direction. The second direction is inconsistent with the first direction. In a preferred embodiment, the first direction and the second direction are perpendicular to each other, that is, the second direction is a horizontal direction perpendicular to the first direction. In other embodiments, the second direction may be substantially parallel to the horizontal direction. This embodiment is described by taking the second direction as a horizontal direction as an example.

[0061] In one embodiment, the bracket 70 is a housing, and the yoke 52 is positioned between the housing and the voice coil 20. The yoke 52 has escape slots 521 corresponding to the positions of the springs 10, through which the corresponding deformable portions 13 pass. The first connecting portion 11 of the spring 10 connects to the voice coil 20, the deformable portion 13 passes through the escape slots 521, and the second connecting portion 12 connects to the housing. Specifically, the yoke 52 is a U-shaped iron, with the escape slots 521 defined on its sidewalls for the corresponding deformable portions 13 to pass through.

[0062] Compared to a planar spring, the spring 10 of this embodiment has a non-wound, narrow and long structure, making the spring 10 a single-wire structure with a narrow and long size. It does not have a large span in the circumferential direction of the voice coil 20. Accordingly, the slot angle and size of the avoidance groove 521 provided on the yoke 52 for avoiding the deformation portion 13 of the spring 10 are also smaller. A smaller slot results in less magnetic leakage, a high utilization rate of the yoke 52, and a corresponding reduction in the size of the yoke 52, resulting in low cost.

[0063] In addition, the first connection portion 11, the deformable portion 13 and the second connection portion 12 of the spring 10 are located in different planes, that is, the spring 10 of this embodiment is a non-planar spring, wherein the first connection portion 11 is arranged along the first direction, that is, the first connection portion 11 is arranged along the up and down direction, the second connection portion 12 is arranged along the second direction, that is, the second connection portion 12 is arranged along the horizontal direction, and the deformable portion 13 is an arc-shaped structure protruding along the first direction, and the deformable portion 13 extends along the circumference of the voice coil 20.

[0064] As can be understood, when the spring clip 10 is assembled with the voice coil 20 or the bracket 70, the first connecting portion 11 of the spring clip 10 can contact the solder pad of the voice coil 20, and the second connecting portion 12 can contact the solder pad of the bracket 70. Solder paste is then applied, and laser welding melts the solder paste to secure the first connecting portion 11 to the solder pad of the voice coil 20, and the second connecting portion 12 to the solder pad of the bracket 70, thereby completing the assembly of the spring clip 10 with the voice coil 20 and the bracket 70. Because the first connecting portion 11 of the spring clip 10 is arranged vertically and the deformable portion 13 is vertically raised, the first connecting portion 11 and the deformable portion 13 are not affected by the vertical vibration of the vibration unit 40. Therefore, this portion of the structure is not affected by rotational forces, has good fatigue resistance, and is less likely to cause the solder joints between the spring clip 10 and the voice coil 20 to break or fall off, thereby ensuring the effective assembly between the spring clip 10 and the voice coil 20 and high reliability. Furthermore, the deformation portion 13 extends along the circumference of the voice coil 20, which can reduce stress concentration in the deformation portion 13, increase fatigue strength, and reduce the risk of fracture of the spring 10. Furthermore, because the deformation portion 13 is a vertically raised arc-shaped structure, when the spring 10 follows the vertical displacement of the vibration unit 40, even when the vibration unit 40 vibrates at a large displacement, the deformation portion 13 can effectively suppress the resonance intensity of the spring 10, avoiding the risk of fracture. The spring 10 also maintains good compliance, providing sufficient displacement without affecting the vibration of the vibration unit 40, thereby optimizing product performance. At the same time, the spring 10 also constrains the reciprocating vibration of the vibration unit 40 according to the vibration offset state of the vibration unit 40 through the elastic deformation of its deformation portion 13, preventing polarization of the vibration unit 40 and making the reciprocating vibration of the vibration unit 40 more stable and having better centering capability. The second connecting portion 12 is arranged in the horizontal direction, which is not only conducive to the connection with the bracket 70, but also increases the contact area between the second connecting portion 12 and the soldering pad of the bracket 70. Since the deformation portion 13 extends along the circumference of the voice coil 20, the rotational force exerted on the spring piece 10 during the vibration process can be suppressed, and the fatigue resistance is good. It is not easy for the soldering pad of the spring piece 10 and the bracket 70 to break or fall off, thereby ensuring the assembly effectiveness between the spring piece 10 and the bracket 70 and high reliability.

[0065] Application device 100 is a sound-generating device, a motor, or a multifunctional vibration device, and has a wide range of applications. The present invention will be described using application device 100 as a sound-generating device. Application device 100 includes a vibration unit 40 and the aforementioned spring 10. Spring 10 is used to balance the vibration of vibration unit 40 in a first direction. There may be one or more vibration units 40, and the vibration units 40 may be arranged vertically or horizontally. The application device 100 further includes a bracket 70. In one embodiment, the vibration unit 40 includes a diaphragm 60 and a voice coil 20 connected to the diaphragm 60; the first connecting portion 11 is connected to the voice coil 20, the second connecting portion 12 is connected to the bracket 70, and / or the bracket 70 is a housing or a yoke 52. Alternatively, in another embodiment, the vibration unit 40 includes a diaphragm 60, a voice coil 20, and a drag cup 80, the voice coil 20 and the drag cup 80 are connected to the same side of the diaphragm 60, the first connecting portion 11 is connected to the drag cup 80, and the second connecting portion 12 is connected to the bracket 70, and / or the bracket 70 is a housing or a yoke 52. The specific structure of the spring 10 in the application device 100 is similar to the above-mentioned embodiment. Since the present application device 100 adopts all the technical solutions of all the above-mentioned embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above-mentioned embodiments, which will not be described in detail here.

[0066] like Figures 1 to 4 As shown, the application device 100 of the present invention includes a plurality of spring pieces 10, which are arranged at intervals along the circumference of the component, and in any two adjacent spring pieces 10, the two first connecting portions 11 are arranged along the first direction and in opposite directions, the two deformation portions 13 are both arc-shaped structures protruding along the first direction and the protrusion directions are opposite, the two deformation portions 13 extend along the circumference of the first component and the extension directions are consistent, and the two second connecting portions 12 are both arranged along the second direction and the extension directions are consistent.

[0067] In one embodiment, the application device 100 includes four springs 10, which are evenly spaced along the periphery of the vibration unit 40, thereby enhancing the centering effect on the vibration unit 40. Specifically, the four springs 10 form four constraints on the voice coil 20 when the vibration unit 40 vibrates vertically, which can prevent the vibration unit 40 from polarizing, and the springs 10 follow the vibration unit 40 in the vertical displacement, thereby enhancing the centering effect on the vibration unit 40. In other embodiments, the number of springs 10 in the spring group 30 can also be three, five, six or other numbers. In a preferred embodiment, the number of springs 10 in the spring group 30 is preferably four. The number of springs 10 in the application device 100 of the present invention can be flexibly adjusted according to actual conditions, and the present invention does not limit the number of springs 10.

[0068] Moreover, in any two adjacent spring pieces 10, the two first connecting portions 11 are arranged in opposite directions, the two deforming portions 13 extend in the same direction and protrude in opposite directions, and the two second connecting portions 12 extend in the same direction, that is, in any two adjacent spring pieces 10, the first connecting portion 11 in one of the spring pieces 10 is arranged vertically downward, the deforming portion 13 protrudes upward, and when viewed from top to bottom, the deforming portion 13 extends clockwise along the circumference of the voice coil 20, and the second connecting portion 12 is arranged horizontally and extends in a clockwise direction; in the other spring piece 10, the first connecting portion 11 is arranged vertically upward, the deforming portion 13 protrudes downward, and when viewed from top to bottom, the deforming portion 13 extends clockwise along the circumference of the voice coil 20, and the second connecting portion 12 is arranged horizontally and extends in a clockwise direction. Such a setting makes the elastic forces of any two adjacent spring pieces 10 relatively symmetrical when the vibration unit 40 vibrates, so that any two adjacent points in the vibration unit 40 can obtain relatively symmetrical elastic forces and offset each other, and further makes the vibration unit 40 obtain relatively symmetrical and mutually offsetting restoring forces at different circumferential positions when vibrating upward or downward when vibrating vertically, thereby achieving consistency in the vibration of the vibration unit 40, better compliance, and improving product performance.

[0069] Furthermore, the application device 100 includes two spring leaf groups 30 , each spring leaf group 30 includes two spring leaves 10 ; the spring leaves 10 of the two spring leaf groups 30 are alternately distributed along the circumference of the component, and the four spring leaves 10 are evenly distributed at intervals. It can be understood that the springs 10 in one of the spring groups 30 are the first springs 10a, and the springs 10 in the other spring group 30 are the second springs 10b. The two first springs 10a and the two second springs 10b are alternately distributed along the circumference of the voice coil 20, that is, along the circumferential direction of the voice coil 20, the first spring 10a, the second spring 10b, the first spring 10a and the second spring 10b are distributed in sequence. The four springs 10 are evenly spaced, and any adjacent first spring 10a and second spring 10b are in opposite and symmetrical settings, so that any two adjacent points of the vibration unit 40 obtain symmetrical and mutually offset elastic forces, and the elastic forces of the springs 10 in the same group remain completely consistent, thereby improving the consistency of vibration of the vibration unit 40.

[0070] Furthermore, the two spring pieces 10 in the same spring piece group 30 are rotationally symmetrical about the center of the component. Specifically, the two spring pieces 10 in the same spring piece group 30 are rotationally symmetrical about the center of the voice coil 20. That is, when one spring piece 10 in the same spring piece group 30 rotates around the center of the voice coil 20 to the position of the other spring piece 10, it can completely overlap with the other spring piece 10, ensuring that the elastic force of the spring pieces 10 in the same group remains absolutely consistent, further improving the consistency of the vibration of the vibration unit 40.

[0071] In one embodiment, of any two adjacent spring fragments 10, the symmetrical structure of one spring fragment 10 about a reference plane is consistent with the structure of the other spring fragment 10, wherein the reference plane is a plane arranged perpendicular to a first direction. Specifically, the first direction is a vertical direction, and the reference plane is a horizontal plane perpendicular to the vertical direction. Of any two adjacent spring fragments 10, the symmetrical structure of one spring fragment 10 about the horizontal plane is consistent with the structure of the other spring fragment 10, that is, after mirroring one spring fragment 10 about the horizontal plane, the mirrored structure obtained is completely consistent with the structure of the other spring fragment 10, thereby achieving symmetrical and completely offset elastic forces at any two adjacent locations of the vibration unit 40, thereby improving the vibration consistency of the vibration unit 40.

[0072] In one embodiment, the projection areas of any two adjacent spring pieces 10 projected vertically onto the component at least partially overlap, that is, in the circumferential direction of the vibration unit 40, the second connecting portion 12 of one spring piece 10 can extend to at least be opposite to the first connecting portion 11 of the other spring piece 10, so that the extension length of the spring piece 10 is sufficient, thereby increasing the compliance of the spring piece 10.

[0073] In one embodiment, the deformable portion 13 of each spring 10 is composed of an arcuate segment 130 and / or a straight segment, resulting in a simple structure and ease of manufacture. Furthermore, the deformable portion 13 composed of an arcuate segment 130 and / or a straight segment has sufficient elastic deformation, providing good compliance when the vibration unit 40 vibrates.

[0074] Specifically, in one embodiment, the deformation portion 13 includes at least two arc segments 130, and on a plane set along the second direction, the radii of at least two arc segments 130 are the same or at least partially different. The provision of at least two arc segments 130 facilitates the circumferential extension of the deformation portion 13 along the voice coil 20, which can suppress the rotational force exerted on the shrapnel 10 during the vibration process. The radii of at least two arc segments 130 can be flexibly set according to actual needs. In one embodiment, on a plane set along the second direction, that is, on a plane set along the horizontal direction, that is, on a horizontal plane in a top-down perspective, the radii of at least two arc segments 130 are the same, which is convenient for manufacturing. Figures 5 to 7 As shown, in another embodiment, on the horizontal plane, the radii of at least two arc segments 130 are at least partially different, so as to achieve uniform stress distribution by flexible design according to different positions of the at least two arc segments 130 relative to the vibration unit 40 and different forces.

[0075] like Figures 5 to 7As shown, in one embodiment, the deformable portion 13 includes three arcuate segments 130. The radii of the three arcuate segments 130 are all different on a plane extending along the second direction. In this embodiment, the deformable portion 13 is divided into three arcuate segments 130 based on the length and distribution of the spring 10, and in combination with its assembly with the voice coil 20 and bracket 70. The three arcuate segments 130 are distributed sequentially from the voice coil 20 toward the bracket 70. The two outermost arcuate segments 130 are connected to the first connecting portion 11 and the second connecting portion 12, respectively. Furthermore, the radii of the three arcuate segments 130 are all different on a horizontal plane to achieve uniform stress distribution.

[0076] Furthermore, the radii of the three arc segments 130 increase successively from the first connection portion 11 to the second connection portion 12, that is, the closer to the bracket 70, the larger the radius of the arc segment 130, and the smaller the curvature, and the curvature becomes more and more gentle as it moves away from the voice coil 20, which is not only conducive to achieving uniform stress distribution, but also, the arc segment 130 close to the voice coil 20 has a greater curvature, which can better suppress the rotational force exerted on the shrapnel 10 during the vibration process, the arc segment 130 close to the bracket 70 has a small curvature, which is convenient for smooth connection with the second connection portion 12 set along the second direction, avoiding stress concentration, and the arc segment 130 located in the middle position plays the role of smooth transition, and the two ends are smoothly connected to the two arc segments 130 located on both sides thereof, avoiding stress concentration.

[0077] In one embodiment, among the three arc segments 130, the arc segment 130 disposed near the first connecting portion 11 is the first arc segment 131, and the arc segment 130 disposed near the second connecting portion 12 is the second arc segment 132. To reduce resonance, the radii of the first arc segment 131 and the second arc segment 132 are set to be within a similar range. Preferably, the radius of the first arc segment 131 is R1, and the radius of the second arc segment 132 is R2, where 0.8 ≤ R1 / R2 ≤ 1.3, specifically, R1 / R2 = 0.85, or R1 / R2 = 0.95, or R1 / R2 = 1.05, or R1 / R2 = 1.2. More preferably, 0.9 ≤ R1 / R2 ≤ 1.2.

[0078] In one embodiment, the first arc segment 131 and the second arc segment 132 both bulge in a first direction, that is, they both bulge vertically. In one embodiment, the first arc segment 131 and the second arc segment 132 both bulge upward, aligning with the vibration direction of the vibration unit 40. This not only protects the first arc segment 131 and the second arc segment 132 from vertical vibration, improving fatigue resistance, but also effectively suppresses the resonance intensity of the spring 10, avoiding the risk of breakage. Furthermore, the centers of the first arc segment 131 and the second arc segment 132 are coplanar, facilitating fabrication while ensuring a smooth transition between the first connecting portion 11 and the second connecting portion 12.

[0079] In a preferred embodiment, the radius of the first arc segment 131 should be close to or greater than the maximum displacement of the vibration unit 40 to reduce the stress on the spring clip 10 under large displacements of the vibration unit 40. Furthermore, the radius of the first arc segment 131 is relatively close to the radius of the second arc segment 132, thereby improving the symmetry of the spring clip 10 and optimizing its compliance. Preferably, the ratio of the radius of the first arc segment 131 to the radius of the second arc segment 132 should not exceed 1.2.

[0080] Another arc segment 130 is a third arc segment 133, which is located between the first arc segment 131 and the second arc segment 132, and the first end and the second end of the third arc segment 133 are connected to the first arc segment 131 and the second arc segment 132 respectively, wherein the first end of the third arc segment 133 and the second end of the third arc segment 133 are located in different planes. Figures 5 to 7 As shown, among the three arc segments 130, the arc segment 130 located in the middle position is the third arc segment 133, and the first end of the second arc segment 132 and the second end of the third arc segment 133 are located in different planes, and there is a height difference between the two to accommodate the changes in the vertical direction between the first connecting portion 11 and the second connecting portion 12.

[0081] Furthermore, at least a portion of the third arc segment 133 extends along the second direction, and the distance between the first end of the third arc segment 133 and the second end of the third arc segment 133 along the first direction is 0 to 2.5 mm. Figures 5 to 7As shown, at least a portion of the structure of the third arc segment 133 extends horizontally. It is understood that the third arc segment 133 also extends circumferentially of the vibration unit 40. Preferably, the vertical distance between the first end of the third arc segment 133 and the second end of the third arc segment 133 is 0 to 2.5 mm, and the height difference between the two ends of the third arc segment 133 is 0 to 2.5 mm. Specifically, the height difference between the two ends of the third arc segment 133 is 0.5 mm, or 1 mm, or 1.5 mm. More preferably, the height difference between the two ends of the third arc segment 133 is 0 to 1.2 mm to better accommodate changes in the height direction of the first connecting portion 11 and the second connecting portion 12.

[0082] In one embodiment, the thickness of the shrapnel 10 is 0.1 mm to 0.5 mm; and / or, the width of the shrapnel 10 is 1.5 mm to 4 mm. In a preferred embodiment, the shrapnel 10 is designed to be of equal thickness and width for ease of manufacture. The thickness and width of the shrapnel 10 can be flexibly set according to the K value (Kms, stiffness coefficient) of the application device 100. In one embodiment, the thickness of the shrapnel 10 can be selected from 0.15 mm, 0.3 mm or 0.45 mm, that is, it can be made of standard sheet material. The width of the shrapnel 10 can be selected from 2 mm, 2.5 mm, 3 mm or 3.5 mm. When Kms=0.04N / mm, the thickness of the spring piece 10 can be selected as 0.15mm and the width can be selected as 2.5mm; when Kms=0.4N / mm, the thickness of the spring piece 10 can be selected as 0.3mm and the width can be selected as 2.5mm; when Kms=1.6N / mm, the thickness of the spring piece 10 can be selected as 0.45mm and the width can be selected as 3mm.

[0083] In one embodiment, the spring 10 is made of any one of phosphor bronze, iron, steel or alloy materials, is not easily affected by environmental changes, is not easily deformed in a high temperature and high humidity environment, and its hardness does not change. It has good fatigue resistance, so that the application device 100 can work in harsh environments, optimize product performance, and improve the wide application of the application device 100.

[0084] Compared with the planar spring disclosed in application number 202010458489.2, the spring clip 10 of the present invention not only has less magnetic flux leakage, but also has better centering ability, and can effectively suppress the resonance intensity of the spring clip 10. The following Table 1 compares the centering ability between the spring clip 10 of the present invention and the planar spring disclosed in application number 202010458489.2 under the same K value; Table 2 compares the magnetic flux leakage between the spring clip 10 of the present invention and the planar spring disclosed in application number 202010458489.2 under the same K value. In both List 1 and List 2, a spring clip 10 with a thickness of 0.3 mm and a width of 2.6 mm is used for comparison with a planar spring with a diameter of 0.6 mm in the planar spring disclosed in application number 202010458489.2.

[0085] Figure 8 Schematic diagram of the spring 10 of the present invention suppressing the resonance intensity, Figure 9 Schematic diagram of the plane spring suppressing resonance intensity disclosed in application number 202010458489.2, from Figure 8 and Figure 9 From the comparison, it can be seen that the spring 10 of the present invention can more effectively suppress the resonance intensity of the spring 10 compared with the planar spring disclosed in application number 202010458489.2.

[0086] List 1:

[0087]

[0088] List 2:

[0089]

[0090] In one embodiment, the bracket 70 is a housing, and the yoke 52 is positioned between the housing and the voice coil 20. The yoke 52 has escape slots 521 corresponding to the positions of the springs 10, through which the corresponding deformable portions 13 pass. The first connecting portion 11 of the spring 10 connects to the voice coil 20, the deformable portion 13 passes through the escape slots 521, and the second connecting portion 12 connects to the housing. Specifically, the yoke 52 is a U-shaped iron, with the escape slots 521 defined on its sidewalls for the corresponding deformable portions 13 to pass through.

[0091] The plurality of avoidance slots 521 are spaced apart along the circumference of the yoke 52, and the total circumferential angle of the plurality of avoidance slots 521 along the yoke 52 accounts for 15% to 35% of the total circumferential angle of the yoke 52. It can be understood that the number of avoidance slots 521 is consistent with the number of springs 10 and is provided in a one-to-one correspondence. The total circumferential angle of the yoke 52 is 360°, and the total circumferential angle of the plurality of avoidance slots 521 along the yoke 52 accounts for 15% to 35% of the total circumferential angle of the yoke 52. That is, the total circumferential angle of the plurality of avoidance slots 521 along the yoke 52 is 54° to 126°. In one embodiment, the number of spring clips 10 is four, and the yoke 52 is provided with four avoidance grooves 521. The sum of the circumferential angles of the four avoidance grooves 521 along the yoke 52 accounts for about 32% of the total circumferential angle of the yoke 52, that is, the sum of the circumferential angles of the four avoidance grooves 521 along the yoke 52 is about 115.2°, and the sum of the circumferential angles of the four spring clips 10 along the yoke 52 accounts for about 11% of the total circumferential angle of the yoke 52, that is, the sum of the circumferential angles of the four spring clips 10 along the yoke 52 is about 39.6°. The angle of each avoidance groove 521 is greater than the angle of the corresponding spring clip 10, so that the size of the avoidance groove 521 is greater than the width of the corresponding spring clip 10. The spring clip 10 has sufficient avoidance space in the avoidance groove 521 to avoid affecting the vibration of the spring clip 10, and thus will not affect the vibration of the vibration unit 40.

[0092] The size of the shrapnel 10 in the application device 100 of the present invention can be flexibly adjusted according to the power of the application device 100 and the vibration displacement of its voice coil 20. A shrapnel 10 with a thickness greater than 0.25 mm and less than or equal to 0.4 mm can be applied to a large speaker with a vibration displacement of the voice coil 20 of 1 mm to 15 mm, and is further suitable for a large speaker with a vibration displacement of the voice coil 20 of 3 mm to 7 mm. The width of the shrapnel 10 can be adjusted according to the K value. It should be noted that in a micro speaker, the vibration displacement of the voice coil 20 is less than 1 mm. In a large speaker, the vibration displacement of the voice coil 20 is greater than 1 mm. In this embodiment, the vibration displacement of the voice coil 20 can be selected to be 1 mm to 15 mm, that is, the application device 100 is a large speaker. Optionally, the vibration displacement of the voice coil 20 is 1 mm, 2 mm, 3 mm, 4 mm, 5 mm, 6 mm, 7 mm, 8 mm, 9 mm, 10 mm, 11 mm, 12 mm, 13 mm, 14 mm, 15 mm, etc., without limitation herein. The vibration displacement of the voice coil 20 refers to the stable displacement during normal operation of the application device 100, and does not include sudden changes in the displacement of the voice coil 20 caused by abnormal current received by the voice coil 20 or other abnormal conditions occurring in the application device 100.

[0093] In one embodiment, when the application device 100 is a large speaker, the voice coil 20 has a cylindrical structure and a relatively large diameter range, and the diameter of the voice coil 20 can be selected from 14 mm to 28 mm. Optionally, the diameter of the voice coil 20 is 14 mm, 16 mm, 18 mm, 20 mm, 22 mm, 25 mm, 28 mm, etc. The diameter of the diaphragm 60 is 40 mm to 75 mm, that is, the diameter of the circle formed by the highest point of the diaphragm 60 can be 40 mm, 45 mm, 50 mm, 55 mm, 60 mm, 65 mm, 70 mm, 75 mm, etc. The spring 10 of the present invention provides better support and centering for the voice coil 20 within this range.

[0094] The above are only preferred embodiments of the present invention and are not intended to limit the patent scope of the present invention. All equivalent structural transformations made using the contents of the present invention's description and drawings, or direct / indirect applications in other related technical fields, within the scope of the present invention are included in the patent protection scope of the present invention.

Claims

1. An application device, characterized in that: The application device includes a plurality of spring pieces, each of which is a non-wound narrow and long structure, and each of which includes a first connecting portion, a second connecting portion, and a deformable portion connected between the first connecting portion and the second connecting portion, the first connecting portion and the second connecting portion being connected to a first component and a second component, respectively, and the first component and the second component can move relative to each other in a first direction, or the first component and the second component are relatively stationary; in each of the spring pieces, the first connecting portion, the deformable portion, and the second connecting portion are located in different planes; The plurality of spring pieces are arranged at intervals along the circumference of the first component, and in any two adjacent spring pieces, the two first connecting portions are arranged along the first direction and in opposite directions, the two deformable portions are arc-shaped structures protruding along the first direction and in opposite directions, the two deformable portions extend along the circumference of the first component and in the same extending direction, the two second connecting portions are arranged along the second direction and in the same extending direction, and the first direction is inconsistent with the second direction; The projection areas of any two adjacent elastic sheets vertically projected onto the first component at least partially overlap.

2. The application device according to claim 1, wherein The application device includes two spring sheet groups, each of which includes two spring sheets. The spring sheets of the two spring sheet groups are alternately distributed along the circumference of the first component, and the four spring sheets are evenly distributed.

3. The application device according to claim 2, characterized in that The two spring pieces of the same spring piece group are rotationally symmetrical about the center of the first component.

4. The application device according to claim 2, wherein: Among any two adjacent elastic pieces, the symmetrical structure of one of the elastic pieces with respect to a reference plane is consistent with the structure of the other elastic piece, wherein the reference plane is a plane arranged perpendicular to the first direction.

5. The application device according to claim 1, wherein: The deformation portion is composed of arc segments and / or straight line segments.

6. The application device according to claim 5, characterized in that The deformation portion includes at least two arc segments; on a plane arranged along the second direction, the radii of at least two arc segments are the same or the radii of at least two arc segments are different.

7. The application device according to claim 6, characterized in that The deformation portion includes three arc segments, and the radii of the three arc segments are different.

8. The application device according to claim 7, characterized in that The radii of the three arc segments increase sequentially from the first connecting portion to the second connecting portion.

9. The application device according to claim 7, characterized in that Among the three arc segments, the arc segment arranged close to the first connecting portion is the first arc segment, and the arc segment arranged close to the second connecting portion is the second arc segment. The radius of the first arc segment is R1, and the radius of the second arc segment is R2, wherein 0.8≤R1 / R2≤1.

3.

10. The application device according to claim 9, characterized in that The first arc segment and the second arc segment both bulge along the first direction, and the center of the first arc segment and the center of the second arc segment are located in the same plane.

11. The application device according to claim 9, characterized in that The other arc segment is a third arc segment, which is located between the first arc segment and the second arc segment, and the first end and the second end of the third arc segment are respectively connected to the first arc segment and the second arc segment, wherein the first end of the third arc segment and the second end of the third arc segment are located in different planes.

12. The application device according to claim 11, characterized in that At least a portion of the structure in the third arc segment extends along the second direction, and a distance between the first end of the third arc segment and the second end of the third arc segment along the first direction is 0-2.5 mm.

13. The application device according to any one of claims 1 to 12, characterized in that in, The first direction and the second direction are perpendicular to each other.

14. The application device according to any one of claims 1 to 12, characterized in that The thickness of the spring piece is 0.1 mm to 0.5 mm; and / or the width of the spring piece is 1.5 mm to 4 mm.

15. The application device according to any one of claims 1 to 12, characterized in that The shrapnel is made of any one of phosphor bronze, iron, steel or alloy materials.

16. The application device according to any one of claims 1 to 12, characterized in that The application device includes a vibration unit, and the elastic piece is used to balance the vibration of the vibration unit along the first direction.

17. The application device according to claim 16, characterized in that The application device is a sound-generating device, the sound-generating device includes a bracket, the vibration unit includes a diaphragm and a voice coil connected to the diaphragm; the first connecting portion is connected to the voice coil, the second connecting portion is connected to the bracket, and the vibration displacement of the voice coil is 1 mm to 15 mm; Alternatively, the vibration unit includes a diaphragm, a voice coil, and a drag cup, the voice coil and the drag cup are connected to the same side of the diaphragm, the first connecting portion is connected to the drag cup, and the second connecting portion is connected to the bracket; And / or, the bracket is a housing or a magnetic yoke.

18. The application device according to claim 17, wherein: The bracket is a shell, the yoke is located between the shell and the voice coil, and the yoke is provided with an avoidance groove corresponding to each of the elastic sheets for the corresponding deformation portion to pass through.

19. The application device according to claim 18, characterized in that The plurality of avoidance grooves are distributed at intervals along the circumferential direction of the magnetic yoke, and the sum of the circumferential angles of the plurality of avoidance grooves along the magnetic yoke accounts for 15% to 35% of the total circumferential angle of the magnetic yoke.

20. The application device according to any one of claims 1 to 12, characterized in that The application device is a sound-generating device, a motor or a multifunctional vibration device.

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