Elastic components and application devices

Abstract

The present invention discloses an elastic component and an application device, wherein the elastic component comprises a first connection portion, a second connection portion and a deformation portion located between the first connection portion and the second connection portion; the first connection portion and the second connection portion are respectively connected to different components, and the different components move relative to each other or are relatively stationary; the deformation portion extends from the first end to the central area along a first direction in a straight line and / or a curve to the central area, and then extends from the central area to the second end in a straight line and / or a curve in a direction opposite to the first direction. The elastic component of the present invention is simple and convenient to manufacture, and the manufacturing process is simplified. The elastic component will not increase the height of the application device in the vertical direction, which is conducive to the thinning of the product, and can reduce the stress concentration of the deformation portion, increase the fatigue strength, and reduce the risk of the elastic component breaking, so that when the elastic component follows the vibration unit in the vertical displacement, the elastic deformation of the deformation portion is large enough and does not affect the vibration of the voice coil.

Description

Technical Field

[0001] The present invention relates to the field of electroacoustic technology, and in particular to an elastic component and an application device. 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. It not only needs to meet the trend of thinness, but also pay more and more attention to performance optimization, while taking into account process simplification and cost control.

[0003] In existing loudspeakers, a centering support is fixedly provided on the voice coil frame to prevent the voice coil from being polarized in a non-vibration direction during vibration, and the centering support is usually in the shape of a sheet-shaped elastic wave. However, the manufacturing process of the sheet-shaped elastic wave-shaped centering support is complicated, and the sheet-shaped elastic wave-shaped centering support will increase the height of the loudspeaker along its vibration direction, increase the space occupied, and is not conducive to the thinning of the product. In the case of a large vibration displacement of the voice coil, the compliance of the sheet-shaped elastic wave-shaped centering support becomes poor and cannot provide sufficient displacement. Instead, it will form a pulling direction opposite to the displacement of the voice coil, affecting the vibration of the voice coil. In addition, the existing loudspeaker has a centering support with a bending angle, and the stress at the bending point is often large, which is prone to breakage. Summary of the invention

[0004] The main purpose of the present invention is to provide an elastic component and an application device, aiming to solve the problem in the prior art that the centering support affects the vibration of the voice coil and is easy to break.

[0005] To achieve the above object, the present invention provides an elastic component, the elastic component comprising a first connecting portion, a second connecting portion, and a deformation portion located between the first connecting portion and the second connecting portion; the first connecting portion and the second connecting portion are respectively connected to different components, the different components can move relative to each other, or the different components are relatively stationary;

[0006] The deformable portion includes a first end connected to one of the first connecting portion and the second connecting portion, and a second end connected to the other of the first connecting portion and the second connecting portion, and a central area is provided between the first end and the second end;

[0007] The deformation portion extends from the first end to the central area in a straight line and / or a curve along a first direction to the central area, and then extends from the central area to the second end in a straight line and / or a curve along a direction opposite to the first direction.

[0008] Preferably, the deformation portion has a spiral structure, and the deformation portion extends from the first end to the central area along a clockwise or counterclockwise spiral to the central area, and then extends from the central area along a counterclockwise or clockwise spiral to the second end.

[0009] Preferably, the deformation portion is in a centrally symmetrical structure along its own center point.

[0010] Preferably, the deformation portion is a square spiral-like structure, and the deformation portion extends from the first end to the central area along a straight line and a curve to the central area, and then extends from the central area to the second end along a curve and a straight line.

[0011] Preferably, the first connecting portion and the second connecting portion are respectively located on two sides of the deformation portion.

[0012] Preferably, each bend in the deformation portion forms a bending line segment, and any two adjacent bending line segments are arranged at intervals.

[0013] Preferably, the distance between any two adjacent bending line segments is at least greater than one times the cross-sectional width of the bending line segments.

[0014] Preferably, the distance from the bending midline of the bending line segment to its bending center is R, and the cross-sectional width of the bending line segment is B, wherein R≥2B.

[0015] Preferably, when the bending angle of the bending line segment is greater than or less than 90°, R≥3B; when the bending angle of the bending line segment is equal to 90°, R≥2B.

[0016] Preferably, the elastic component is formed by winding a linear structure or by stamping a sheet structure.

[0017] Preferably, the deformation portion is a planar structure, and the deformation portion, the first connecting portion and the second connecting portion are located in the same horizontal plane.

[0018] Preferably, the elastic component is an integral stamping structure; the areas of the deformation portion close to the first connecting portion and the second connecting portion form two widened areas correspondingly, the area where the deformation portion is located between the two widened areas is a non-widened area, and the cross-sectional widths of the first connecting portion, the second connecting portion and the bending line segment located in the widened area are greater than the cross-sectional width of the bending line segment in the non-widened area.

[0019] Preferably, the elastic component is formed by winding a metal wire, and the cross-sectional widths of the first connecting portion, the second connecting portion, and the bending line segment are equal.

[0020] Preferably, the gap between the first connecting portion and the bending line segment adjacent thereto, the gap between two adjacent bending line segments, and the gap between the second connecting portion and the bending line segment adjacent thereto are all greater than or equal to the thickness of the elastic component.

[0021] Preferably, damping members are provided at the gap between the bending line segment connected to the first connecting portion and the bending line segment adjacent thereto, and at the gap between the bending line segment connected to the second connecting portion and the bending line segment adjacent thereto, and the damping members connect two adjacent bending line segments.

[0022] Preferably, the elastic component is made of any one of phosphor bronze, iron, steel or alloy materials.

[0023] The present invention further provides an application device, which includes a vibration unit and the elastic component as described above, wherein the elastic component is used to balance the vibration of the vibration unit along a preset direction.

[0024] Preferably, there may be one or more vibration units, and the vibration units may be arranged in a vertical direction or a horizontal direction.

[0025] Preferably, the application device comprises an elastic component group, wherein the elastic component group comprises at least three elastic components uniformly spaced apart along the periphery of the vibration unit.

[0026] Preferably, two of the elastic components are conductive structures, and the remaining elastic components are non-conductive structures.

[0027] Preferably, there are a plurality of elastic component groups, and the plurality of elastic component groups are arranged at intervals along the height direction of the vibration unit, and all the elastic components of each elastic component group are located in the same horizontal plane.

[0028] Preferably, the application device is a sound-generating device, the sound-generating device further comprises a bracket, the vibration unit comprises 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;

[0029] 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 connection portion is connected to the drag cup, and the second connection portion is connected to the bracket;

[0030] And / or, the bracket is a housing or a yoke.

[0031] Preferably, the application device is a sound-generating device, a motor or a multifunctional vibration device.

[0032] In the technical solution of the present invention, the deformation part of the elastic component is extended in two opposite directions in straight lines and / or curves through a narrow and long structure, which can reduce the stress concentration of the deformation part, increase fatigue strength, and reduce the risk of the elastic component breaking, so that when the elastic component follows the vibration unit in the vertical displacement, the elastic deformation of the deformation part is large enough. Even when the vibration displacement of the vibration unit is large, the compliance of the elastic component is well maintained, and sufficient displacement can be provided without affecting the vibration of the vibration unit, thereby optimizing product performance. In addition, the elastic component of the present invention is formed by bending and extending in a narrow and long structure as a whole, which is simple and convenient to manufacture, simplifies the manufacturing process, has high manufacturing efficiency, and reduces manufacturing costs. In addition, the elastic component of the present invention will not increase the height of the application device in the vertical direction, occupies a small space, and is conducive to the thinning of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. 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 creative work.

[0034] Figure 1 A schematic top view of an elastic component according to an embodiment of the present invention;

[0035] Figure 2 is a schematic top view of an elastic component according to another embodiment of the present invention;

[0036] Figure 3 A schematic front view of a voice coil and an elastic component in an application device according to an embodiment of the present invention;

[0037] Figure 4 It is a three-dimensional schematic diagram of a voice coil and an elastic component in an application device according to an embodiment of the present invention;

[0038] Figure 5 It is a three-dimensional schematic diagram of a voice coil and an elastic component in an application device according to another embodiment of the present invention;

[0039] Figure 6 A schematic top view of a voice coil and an elastic component in an application device according to another embodiment of the present invention;

[0040] Figure 7 It is a cross-sectional schematic diagram of an application device according to an embodiment of the present invention.

[0041] Description of Figure Numbers:

[0042]

[0043]

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

[0045] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are 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 components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication 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 used for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to 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 invention provides an elastic component.

[0049] like Figure 1 , Figure 3 and Figure 4As shown, the elastic component 10 of this embodiment includes a first connection part 11, a second connection part 12, and a deformation part 13 located between the first connection part 11 and the second connection part 12, wherein the first connection part 11 and the second connection part 12 are respectively connected to different components, and the different components can move relative to each other, or the different components are relatively static. The deformation part 13 is located between the first connection part 11 and the second connection part 12, and the deformation part 13 includes a first end connected to one of the first connection part 11 and the second connection part 12, and a second end connected to the other of the first connection part 11 and the second connection part 12, and a central area 134 is provided between the first end and the second end; the deformation part 13 extends from the first end to the central area 134 in a straight line and / or a curve along a first direction to the central area 134, and then extends from the central area 134 in a straight line and / or a curve along a direction opposite to the first direction to the second end.

[0050] Specifically, the elastic component 10 can be a linear, narrow strip or sheet structure formed by integrally stamping a metal plate, or a linear structure formed by winding a single strand of metal wire, or a linear structure formed by winding a double strand of metal wire, etc. The above-mentioned first direction can be clockwise, and the shape of the deformation portion 13 can be a polygonal spiral structure, specifically a quadrilateral, pentagon, hexagon, etc., or a circular, elliptical structure, or a structure combining a straight line and a curved line shape. For example, each bend in the deformation portion 13 is a bending line segment 133, part of the bending line segment 133 is a straight line, and the other part is a curve, which can specifically be a shape in which a curve and a straight line are alternately connected. It should be noted that the alternation here is not limited to one-to-one alternation, and can also be an alternation of one and many, or many and many.

[0051] The elastic component 10 is formed by bending and extending a narrow and long structure as a whole, wherein the deformation portion 13 can be a spiral structure, formed by the first end thereof extending to the central region 134 in a clockwise spiral to the central region 134, and then extending from the central region 134 in a counterclockwise direction to the second end. The deformation portion 13 can also be a square-shaped spiral structure, formed by the first end thereof extending to the central region 134 along a straight line and a curve to the central region 134, and then extending from the central region 134 along a curve and a straight line to the second end. The deformation portion 13 can also be other structures formed by bending and extending a narrow and long structure, and the structural shape of the deformation portion 13 can be set according to actual use requirements, and the elastic component 10 of the present invention does not limit the structure of the deformation portion 13.

[0052] like Figure 7As shown, the elastic component 10 of this embodiment is applied to an application device 100 such as a sound-generating device, a motor or a multifunctional vibration device. This embodiment is described by taking the elastic component 10 applied to a sound-generating device as an example. The sound-generating device includes an elastic component 10 and a vibration unit 40, and the elastic component 10 is used to balance the vibration of the vibration unit 40 along a preset 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 elastic component 10 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; 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, the second connecting portion 12 is connected to the bracket 70, and / or the bracket 70 is a housing or a yoke.

[0053] It can be understood that after the vibration unit 40 is connected to the electrical signal, it can vibrate in the up and down directions in the housing. Figure 3 The vibration direction of the vibration unit 40 is represented by the vertical direction or the up-down direction, and the direction perpendicular to the vibration of the vibration unit 40 is represented by the horizontal direction. Figure 4 As shown, in one embodiment, the first connection portion 11 of the elastic component 10 is connected to the voice coil 20. Specifically, the voice coil 20 includes a frame 21 and a voice coil wire 22 wound outside the frame 21. The first connection portion 11 can be connected to the frame 21 or the voice coil wire 22. The second connection portion 12 of the elastic component 10 is connected to the housing to achieve assembly between the voice coil 20, the elastic component 10 and the housing. Figure 7 As shown, in another embodiment, the first connection portion 11 is connected to the drag cup 80, and the second connection portion 12 is connected to the housing. In other embodiments, the first connection portion 11 is connected to the drag cup 80, and the second connection portion 12 is connected to the yoke, or the first connection portion 11 is connected to the voice coil 20, and the second connection portion 12 is connected to the yoke.

[0054] like Figure 7As shown, specifically, in one embodiment, the application device 100 includes a vibration unit 40, a magnetic circuit system 50, and a housing for mounting and fixing the vibration unit 40 and the magnetic circuit system 50; wherein the vibration unit 40 includes a diaphragm 60 and a voice coil 20 combined below the diaphragm 60; the magnetic circuit system 50 includes an upper magnetic conductive plate, a magnet, and a lower magnetic conductive plate, wherein the upper magnetic conductive plate and the lower magnetic conductive plate are magnetic conductive structures for correcting the magnetic lines of force generated by the magnet, 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 may be a U-shaped structure, including a bottom wall and a side wall, a magnetic gap 51 is formed between the upper magnetic conductive plate, the magnet, and the side wall of the lower magnetic conductive plate, a relatively uniform magnetic field is formed in the magnetic gap 51, and the voice coil 20 is disposed in the magnetic gap 51 having a relatively uniform magnetic field. The voice coil 20 is usually made of wound metal wire. When the voice coil 20 is connected to an electrical signal, it vibrates up and down in the magnetic field under the action of 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 the like, when the voice coil 20 vibrates up and down according to the electrical signal, it will also drive the diaphragm 60 to vibrate and generate 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 will further affect the vibration of the diaphragm 60.

[0056] In order to prevent the polarization from occurring, an elastic component 10 connecting the voice coil 20 and the bracket 70 can be provided to center the polarization of the voice coil 20, that is, to ensure that the voice coil 20 vibrates along the vibration direction in the magnetic gap 51. In one embodiment, the elastic component 10 is a centering support sheet or a planar spring.

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

[0058] In one embodiment, the bracket 70 is a housing or a yoke. Since the housing can be used to carry the sound-generating device unit, setting the bracket 70 as a housing can facilitate fixing the side of the elastic component 10 away from the vibration unit 40, thereby improving the centering support effect of the elastic component 10. Since most of the vibration unit 40 is close to the magnetic gap 51, the distance between it and the yoke is relatively close. Connecting the side of the elastic component 10 away from the vibration unit 40 to the yoke can save the setting distance of the elastic component 10 on the one hand, and facilitate improving the centering support effect of the elastic component 10. It should be noted that, as described above, the fixing method of the elastic component 10 in this embodiment includes a variety of combinations: the first connection portion 11 and the second connection portion 12 of the elastic component 10 are respectively connected to the voice coil 20 and the housing, or the first connection portion 11 and the second connection portion 12 of the elastic component 10 are respectively connected to the voice coil 20 and the yoke, or the first connection portion 11 and the second connection portion 12 of the elastic component 10 are respectively connected to the drag cup 80 and the housing, or the first connection portion 11 and the second connection portion 12 of the elastic component 10 are respectively connected to the drag cup 80 and the yoke, all of which can better ensure the centering support effect of the elastic component 10.

[0059] The arrangement of the elastic component 10 of this embodiment forms a horizontal constraint on the vibration unit 40 when the vibration unit 40 vibrates vertically, which can prevent the vibration unit 40 from polarizing, and the elastic component 10 follows the displacement of the vibration unit 40 in the vertical direction. Compared with the existing sheet-shaped elastic wave-shaped centering support, the deformation part 13 of the elastic component 10 of this embodiment extends in a straight line and / or a curve in two opposite directions through a narrow and long structure, which can reduce the stress concentration of the deformation part 13, increase the fatigue strength, and reduce the risk of the elastic component 10 breaking, so that when the elastic component 10 follows the vibration unit 40 to move in the vertical direction, the elastic deformation of the deformation part 13 is large enough. Even when the vibration displacement of the vibration unit 40 is large, the compliance of the elastic component 10 is maintained well, and sufficient displacement can be provided, which does not affect the vibration of the vibration unit 40 and optimizes the product performance. In addition, the elastic component 10 of this embodiment is formed by bending and extending in a narrow and long structure as a whole, which is simple and convenient to manufacture, simplifies the manufacturing process, has high manufacturing efficiency, and reduces the manufacturing cost. Furthermore, the elastic component 10 of this embodiment will not increase the height of the application device 100 in the vertical direction, and occupies a small space, which is conducive to the thinning of the product.

[0060] like Figure 1As shown, in one embodiment, the deformation portion 13 is in a spiral structure, and the deformation portion 13 is extended from the first end to the central area 134 in a clockwise or counterclockwise spiral to the central area 134, and then extends from the central area 134 in a counterclockwise or clockwise spiral to the second end, so that the deformation portion 13 is in a spiral structure that is extended in two opposite directions respectively, and has a large elastic deformation, which can provide good compliance when the vibration displacement of the vibration unit 40 is large. The first connecting portion 11 and the second connecting portion 12 are respectively located on both sides of the deformation portion 13, and the first end and the second end of the deformation portion 13 can be connected to the first connecting portion 11 or the second connecting portion 12 at any corresponding time, that is, the first end of the deformation portion 13 is connected to the first connecting portion 11, and the second end of the deformation portion 13 is connected to the second connecting portion 12, or the first end of the deformation portion 13 is connected to the second connecting portion 12, and the second end of the deformation portion 13 is connected to the first connecting portion 11. Furthermore, the deformation portion 13 presents a central symmetrical structure along its own center point, which is easy to manufacture on the one hand, and on the other hand, the first end and the second end of the deformation portion 13 are interchangeable, which is convenient to use.

[0061] In another embodiment, the deformation part 13 is a square-shaped spiral-like structure, and the deformation part 13 extends from the first end to the central area 134 along a straight line and a curve to the central area 134, and then extends from the central area 134 along a curve and a straight line to the second end, so that the deformation part 13 is a spiral-like structure extending along a straight line and a curve in two opposite directions, and has a large elastic deformation, which can provide good compliance when the vibration unit 40 has a large vibration displacement. The first connecting part 11 and the second connecting part 12 are respectively located on both sides of the deformation part 13, and the first end and the second end of the deformation part 13 can be connected to the first connecting part 11 or the second connecting part 12 at will, that is, the first end of the deformation part 13 is connected to the first connecting part 11, and the second end of the deformation part 13 is connected to the second connecting part 12, or the first end of the deformation part 13 is connected to the second connecting part 12, and the second end of the deformation part 13 is connected to the first connecting part 11. The present invention can flexibly set the deformation part 13 to be a spiral structure or a square-shaped spiral-like structure according to actual conditions, which is simple and convenient.

[0062] In this embodiment, each bend in the deformation portion 13 is a bending line segment 133, and any two adjacent bending line segments 133 are arranged at intervals to provide sufficient elastic deformation. Furthermore, the interval between any two adjacent bending line segments 133 is at least greater than one times the cross-sectional width of the bending line segment 133, further improving the elastic deformation degree of the deformation portion 13. Figure 1 , Figure 3 and Figure 4As shown, in the elastic component 10 of this embodiment, the distance from the bending midline of the bending line segment 133 of the deformation portion 13 to its bending center is R, and the cross-sectional width of the bending line segment 133 is B, wherein R≥B. On the one hand, the stress concentration of the deformation portion 13 can be reduced, the fatigue strength can be increased, and the risk of breakage of the elastic component 10 can be reduced. On the other hand, sufficient processing space can be provided to avoid the tool scratching the wire during processing, thereby ensuring that the performance of the elastic component 10 is not affected.

[0063] like Figure 2 As shown, in one embodiment, the deformation portion 13 is an S-shaped bending structure, and the end of the first end of the deformation portion 13 is bent in an S-shape toward the second end to form the deformation portion 13, and the direction of the S-shaped bending is consistent with the direction from the first connection portion 11 to the second connection portion 12. The elastic component 10 is bent in an S-shape as a whole, and the elastic deformation of the elastic component 10 bent in an S-shape is large, which can provide good compliance when the vibration displacement of the vibration unit 40 is large. The shape of the elastic component 10 of the present invention can be flexibly set according to actual conditions. In other embodiments, the elastic component 10 can also be bent in a serpentine shape or other shapes.

[0064] The elastic component 10 with the deformation part 13 in a spiral structure or a square spiral-like structure is referred to as the spiral elastic component 10 hereinafter, and the elastic component 10 with the deformation part 13 in an S-shaped bend is referred to as the S-shaped elastic component 10 hereinafter. Compared with the S-shaped elastic component 10, the spiral elastic component 10 can further reduce stress concentration, increase fatigue strength, and greatly reduce the risk of fracture of the elastic component 10. Specifically, it can be understood according to the following formula analysis: Formula 1: σ=Εε, where σ represents the stress in the solid, ε represents the strain, and E represents the elastic modulus or Young's modulus; Formula 2: σ=Fn / S, where σ represents the stress in the solid, Fn represents the maximum stress, and S represents the area where Fn acts; Formula 3: ε=Δl / l0, where ε represents the strain, l0 represents the original length of the elastic body, and Δl represents the elongation of the elastic body after being subjected to force. According to the conversion of Formula 1 to Formula 3, Formula 4 can be obtained: Fn / S=E·(Δl / l0). It can be seen from Formula 4 that when the same material is used, that is, the elastic modulus E is the same, when the elastic modulus E, the elongation Δl and the area S over which Fn acts are the same, the greater the original length l0 of the elastomer, the smaller the stress.

[0065] like Figure 1 It can be seen that the original length l0 of the elastic body of the spiral elastic component 10 is Figure 1 L1 represented in Figure 2 It can be seen that the original length l0 of the elastic body of the S-shaped elastic component 10 is Figure 2As shown in L2, it is obvious that L1 is greater than L2. When the elastic modulus E, elongation Δl and area S of Fn acting on the two shapes of elastic components 10 are the same, the stress of the spiral elastic component 10 is smaller than that of the S-shaped elastic component 10.

[0066] As shown in the table below, after simulation analysis of the above two shapes of springs, by comparing the stress magnitude and distribution under the same wire length, the same mechanical stiffness Kms and the same displacement, the stress of the spiral elastic component 10 is significantly reduced.

[0067] Elastic component type Total length (mm) Kms(N / mm) Displacement(mm) Maximum stress(Mpa) Spiral 50 0.6 2 780 S-Shape 50 0.6 2 390

[0068] The following is a description of the spiral elastic component 10 .

[0069] like Figure 1 As shown, the distance from the bending midline of the bending line segment 133 of the deformation portion 13 to its bending center is R, and the cross-sectional width of the bending line segment 133 is B, wherein R≥2B, further reducing stress concentration at the bending point and increasing fatigue strength, thereby further reducing the risk of breakage of the elastic component 10.

[0070] Furthermore, when the bending angle of the bending line segment 133 is greater than or less than 90°, R≥3B; when the bending angle of the bending line segment 133 is equal to 90°, R≥2B. Since the stress concentration is greater when the bending angle is greater than or less than 90° than when the bending angle is equal to 90°, R≥3B is selected when the bending angle is greater than or less than 90°, that is, the distance from the bending centerline to its bending center is further increased, which is beneficial to increase the fatigue strength of the overall structure of the elastic component 10 and reduce the risk of the elastic component 10 breaking.

[0071] The elastic component 10 of the present embodiment is wound by a linear structure, which is easy to manufacture and can provide good compliance when the voice coil 20 vibrates and displaces a large amount. After stamping, the cross-section of the elastic component 10 of the present embodiment is in a square or rectangular shape, or in other flat shapes. Furthermore, the deformation portion 13 of the elastic component 10 is a planar structure, and the deformation portion 13 and the first connecting portion 11 and the second connecting portion 12 are located in the same horizontal plane, so that the elastic component 10 is a planar structure as a whole. Compared with the existing sheet-shaped elastic component 10 with a spring wave shape, the present embodiment improves the overall flatness of the elastic component 10, further reduces the height of the application device 100 in the vertical direction, and realizes the design concept of thinning the product.

[0072] In one embodiment, the elastic component 10 is stamped and formed by a sheet structure, and the elastic component 10 is an integrated stamped and formed structure, which is easy to manufacture, and the flatness and dimensional tolerance of the stamped and formed elastic component 10 are easier to control, and the product yield is high. The area of ​​the deformation part 13 close to the first connection part 11 and the second connection part 12 corresponds to forming two widening areas 131, and the area between the two widening areas 131 of the deformation part 13 is a non-widening area 132, and the cross-sectional width of the bending line segment 133 in the widening area 131 is greater than the cross-sectional width of the bending line segment 133 in the non-widening area 132. It can be understood that the displacement generated by the first connection part 11, the second connection part 12 and the area close to the first connection part 11 and the second connection part 12 on the deformation part 13 is large, the elastic deformation is large, and the stress concentration is large. In this embodiment, the area of ​​the deformation part 13 close to the first connection part 11 and the second connection part 12 is respectively set as two widened areas 131, and the area between the two widened areas 131 on the deformation part 13 is set as a non-widened area 132, and the cross-sectional width of the bending line segment 133 in the widened area 131 is widened, so that the cross-sectional width of the bending line segment 133 of the first connection part 11, the second connection part 12 and the widened area 131 is greater than the cross-sectional width of the bending line segment 133 of the non-widened area 132, which is conducive to reducing stress concentration, avoiding fracture, and ensuring the normal use of the elastic component 10. In addition, in this embodiment, the line width of the deformation part 13 is partially widened, which can change the vibration frequency of the elastic component 10 as a whole, eliminate resonance, and optimize product performance.

[0073] Specifically, in this embodiment, the line width of the first connecting portion 11, the second connecting portion 12 and the bending line segment 133 in the widened area 131 is B1, and the line width of the bending line segment 133 in the non-widened area 132 is B2, wherein B2<B1≤8B2. It can be understood that the bending centerline can be in the shape of an arc, an ellipse or any other bending shape, and the shape of the bending centerline can be adaptively adjusted according to actual needs. The present invention does not limit the shape of the bending centerline. This embodiment is explained by taking the bending centerline in the shape of an arc as an example. The bending angle represents the angle formed by the line connecting the two end points of the bending line segment 133 and the center of the bending line segment 133, and R represents the straight-line distance from the center of the bending line segment 133 to the bending centerline, that is, the radius of the bending centerline.

[0074] It can be understood that the length R1 of the bending center line of the bending line segment 133 in the widening area 131 is ≥ 2B1, and the length R2 of the bending center line of the bending line segment 133 in the non-widening area 132 is ≥ 2B2. More specifically, when the bending angle of the bending line segment 133 in the widening area 131 is greater than or less than 90°, R1 ≥ 3B1, and when the bending angle of the bending line segment 133 in the widening area 131 is equal to 90°, R1 ≥ 2B1; when the bending angle of the bending line segment 133 in the non-widening area 132 is greater than or less than 90°, R2 ≥ 3B2, and when the bending angle of the bending line segment 133 in the non-widening area 132 is equal to 90°, R2 ≥ 3B2.

[0075] In another embodiment, the elastic component 10 is wound by metal wire. Specifically, the elastic component 10 can be a linear structure wound by a single strand of metal wire or a linear structure wound by a double strand of metal wire, which is flexible and convenient to manufacture. The cross-sectional widths of the first connecting portion 11, the second connecting portion 12 and the bending line segment 133 are equal, that is, the elastic component 10 can be manufactured by winding metal wires of equal width, which is convenient to manufacture.

[0076] Regardless of whether the elastic component 10 is a sheet metal integrally stamped structure or is wound by metal wire, the gap between the first connecting portion 11 and the adjacent bending line segment 133, the gap between two adjacent bending line segments 133, and the gap between the second connecting portion 12 and the adjacent bending line segment 133 are all greater than or equal to the thickness of the elastic component 10, so as to facilitate stamping. The thickness of the elastic component 10 in this embodiment can be 0.1 mm to 0.5 mm, and the above-mentioned gaps can be set to 1.5 times the thickness of the elastic component 10.

[0077] The gap between the bending line segment 133 connected to the first connection part 11 and the adjacent bending line segment 133, and the gap between the bending line segment 133 connected to the second connection part 12 and the adjacent bending line segment 133 are both provided with a damping member 14, and the damping member 14 connects two adjacent bending line segments 133. The material of the damping member 14 includes at least one of metal material, rubber material, silicone material, glue material, and foam material; and / or, the shape of the damping member 14 is a sheet structure or a linear structure, and only needs to connect two adjacent bending line segments 133.

[0078] In one embodiment, the damping member 14 is a damping glue, and the bending line segment 133 connected to the first connecting portion 11 has a large amplitude, so the damping glue is locally coated or injected at the gap between the bending line segment 133 and the adjacent bending line segment 133, and the damping glue connects the two bending line segments 133, improves the resonant frequency of the elastic component 10, eliminates resonance, and further optimizes product performance. Similarly, the bending line segment 133 connected to the second connecting portion 12 has a large amplitude, so the damping glue is locally coated or injected at the gap between the bending line segment 133 and the adjacent bending line segment 133, and the damping glue connects the two bending line segments 133, improves the resonant frequency of the elastic component 10, eliminates resonance, and further optimizes product performance.

[0079] Existing elastic wave materials are easily affected by environmental changes, are easily deformed in high temperature and high humidity environments, their hardness changes, and their fatigue resistance is relatively poor. The elastic component 10 of the present invention 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 high temperature and high humidity environments, 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 versatility of application of the application device 100. For the convenience of connection, on the elastic component 10, the second connecting portion 12 is formed at one end away from the deformation portion 13 to form a hook portion 121, and the hook portion 121 is connected to the outer shell. Specifically, the hook portion 121 is connected to the hanging column of the outer shell.

[0080] The present invention further provides an application device 100, which is a sound-generating device, a motor or a multifunctional vibration device, and has a wide range of applications. The present invention is described by taking the application device 100 as a sound-generating device, and the application device 100 includes a vibration unit 40 and the elastic component 10, and the elastic component 10 is used to balance the vibration of the vibration unit 40 along a preset direction. There may be one or more vibration units 40, and the vibration units 40 may be arranged in a vertical direction or a horizontal direction. 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 connection portion 11 is connected to the voice coil 20, the second connection portion 12 is connected to the bracket 70, and / or the bracket 70 is a housing or a yoke; or, 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 connection portion 11 is connected to the drag cup 80, the second connection portion 12 is connected to the bracket 70, and / or the bracket 70 is a housing or a yoke. The specific structure of the elastic component 10 in the application device 100 refers to the above embodiment. Since the application device 100 adopts all the technical solutions of all the above embodiments, it at least has all the beneficial effects brought by the technical solutions of the above embodiments, which will not be repeated here.

[0081] like Figures 3 to 6 As shown, in the application device 100 of this embodiment, the number of elastic components 10 is at least three, and at least three elastic components 10 are evenly spaced along the periphery of the voice coil 20. In one embodiment, the number of elastic components 10 is three, and the three elastic components 10 are evenly spaced along the periphery of the vibration unit 40, which enhances the centering effect of the vibration unit 40. Specifically, when the vibration unit 40 vibrates vertically, at least three elastic components 10 form at least three constraints on the voice coil 20 in the horizontal direction, which can prevent the vibration unit 40 from polarizing, and the elastic component 10 moves in the vertical direction following the vibration unit 40, which enhances the centering effect of the vibration unit 40. In other embodiments, the number of elastic components 10 can also be four, five, six or other numbers. The number of elastic components 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 elastic components 10.

[0082] The application device 100 may include at least one elastic component group 30, and one elastic component group 30 includes at least three elastic components 10 located in the same horizontal plane. In the same elastic component group 30, the line width or material of the three elastic components 10 may be the same or different. For example, due to different material properties, among the three elastic components 10, if one of the elastic components 10 is made of phosphor bronze, its line width may be set to 0.4 mm, if another elastic component 10 is made of beryllium copper, its line width may be set to 0.3 mm, and if another elastic component 10 is made of 316 steel, its line width may be set to 0.2 mm.

[0083] In addition, among the three elastic components 10 of the same elastic component group 30, two of the elastic components 10 are of a conductive structure, and the remaining elastic components 10 are of a non-conductive structure. The elastic component 10 of the conductive structure has a conductive function, and can transmit an electrical signal to the vibration unit 40 of the application device 100. Specifically, the elastic component 10 is electrically connected to the wiring part of the voice coil 20 in the vibration unit 40 through its first connection part 11, and the second connection part 12 is connected to an external power source, so as to transmit the electrical signal between the voice coil 20 and the outside through the elastic component 10; in addition, the elastic component 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 part 13, so that the vibration unit 40 is stabilized in a preset central area, and the polarization of the vibration unit 40 is prevented, so that the reciprocating vibration of the vibration unit 40 is more stable. Therefore, the elastic component 10 has both the functions of conductivity and centering, realizing the integration of these two functions. Only two elastic components 10 of the present invention need to be arranged in the application device 100 to simultaneously realize the conduction function of the internal and external circuits and the centering function of the vibration of the vibration unit 40. This not only saves space in the cavity of the application device 100, further facilitates the thinning of the product, but also effectively simplifies the assembly process of the application device 100.

[0084] The application device 100 may include multiple elastic component groups 30, such as two or three elastic component groups 30, and the multiple elastic component groups 30 are arranged at intervals along the height direction of the skeleton 21, and all elastic components 10 of each elastic component group 30 are located in the same horizontal plane. Take two elastic component groups 30 as an example for explanation, the two elastic component groups 30 are arranged at intervals along the vertical direction of the vibration unit 40, each elastic component group 30 includes four elastic components 10, and the four elastic components 10 are located in the same horizontal plane, and the eight elastic components 10 of the two elastic component groups 30 are arranged in a staggered manner in the vertical direction, which not only enhances the centering effect on the vibration unit 40, but also has good symmetry and flatness of the mechanical stiffness Kms, meeting the large displacement fatigue requirements. Compared with one elastic component group 30, multiple elastic component groups 30, on the one hand, enhance the centering effect on the vibration unit 40, and on the other hand, reduce stress concentration, and can reduce the line width of the elastic component 10 accordingly, making it easier to manufacture.

[0085] In the application device 100 of the present invention, the number and arrangement of the elastic component groups 30, as well as the shape, structure, line width, material and properties of each elastic component group 30 can be flexibly set according to actual needs, with good compatibility and a wide range of applications.

[0086] 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 changes made using the contents of the present invention's specification and drawings, or directly / indirectly applied in other related technical fields, are included in the patent protection scope of the present invention.

Claims

1. An elastic component, characterized in that: The elastic component includes a first connecting portion, a second connecting portion, and a deformation portion located between the first connecting portion and the second connecting portion; the first connecting portion and the second connecting portion are respectively connected to different components, and the different components move relative to each other, or the different components are relatively stationary; The deformable portion includes a first end connected to one of the first connecting portion and the second connecting portion, and a second end connected to the other of the first connecting portion and the second connecting portion, and a central area is provided between the first end and the second end; The deformation portion extends from the first end to the central area along a first direction in a straight line and / or a curve to the central area, and then extends from the central area along a direction opposite to the first direction in a straight line and / or a curve to the second end; The elastic component is formed by winding a linear structure or by stamping a sheet structure, and a gap is formed, and a damping member connected to the elastic component is arranged in the gap.

2. The elastic member according to claim 1, characterized in that The deformation portion is in a spiral structure, and the deformation portion is formed by extending from the first end to the central area along a clockwise or counterclockwise spiral to the central area, and then extending from the central area along a counterclockwise or clockwise spiral to the second end.

3. The elastic member according to claim 2, characterized in that The deformation portion is centrally symmetrical along its own center point.

4. The elastic member according to claim 1, wherein: The deformation portion is a square spiral-like structure, and the deformation portion extends from the first end to the central area along a straight line and a curve to the central area, and then extends from the central area to the second end along a curve and a straight line.

5. The elastic member according to claim 1, wherein: The first connection portion and the second connection portion are respectively located on two sides of the deformation portion.

6. The elastic member according to any one of claims 1 to 5, characterized in that Each bending in the deformation portion forms a bending line segment, and any two adjacent bending line segments are arranged at intervals.

7. The elastic member according to claim 6, characterized in that The distance between any two adjacent bending line segments is at least greater than one times the cross-sectional width of the bending line segments.

8. The elastic member according to claim 6, characterized in that: The distance from the bending midline of the bending line segment to its bending center is R, and the cross-sectional width of the bending line segment is B, wherein R≥2B.

9. The elastic member according to claim 8, characterized in that When the bending angle of the bending line segment is greater than or less than 90°, R≥3B; when the bending angle of the bending line segment is equal to 90°, R≥2B.

10. The elastic member according to claim 6, characterized in that: The deformation portion is a planar structure, and the deformation portion, the first connection portion and the second connection portion are located in the same horizontal plane.

11. The elastic member according to claim 6, characterized in that: The elastic component is an integral stamping structure; the areas of the deformation portion close to the first connecting portion and the second connecting portion form two widened areas correspondingly, the area of ​​the deformation portion located between the two widened areas is a non-widened area, and the cross-sectional widths of the first connecting portion, the second connecting portion and the bending line segment located in the widened area are greater than the cross-sectional width of the bending line segment in the non-widened area.

12. The elastic member according to claim 6, characterized in that: The elastic component is formed by winding a metal wire, and the cross-sectional widths of the first connecting portion, the second connecting portion, and the bending line segment are equal.

13. The elastic member according to claim 6, characterized in that: The gap between the first connecting portion and the bending line segment adjacent thereto, the gap between two adjacent bending line segments, and the gap between the second connecting portion and the bending line segment adjacent thereto are all greater than or equal to the thickness of the elastic component.

14. The elastic member according to claim 13, wherein: The damping member is provided at the gap between the bending line segment connected to the first connection part and the bending line segment adjacent thereto, and at the gap between the bending line segment connected to the second connection part and the bending line segment adjacent thereto, and the damping member connects two adjacent bending line segments.

15. The elastic member according to any one of claims 1 to 5, characterized in that: The elastic component is made of any one of phosphor bronze, iron, steel or alloy materials.

16. An application device, characterized in that: The application device comprises a vibration unit and the elastic component according to any one of claims 1 to 15, wherein the elastic component is used to balance the vibration of the vibration unit along a preset direction.

17. The application device according to claim 16, characterized in that: There are one or more vibration units, and the vibration units are arranged in a vertical direction or a horizontal direction.

18. The application device according to claim 16, characterized in that: The application device includes an elastic component group, and the elastic component group includes at least three elastic components uniformly spaced along the periphery of the vibration unit.

19. The application device according to claim 18, characterized in that: Two of the elastic components are conductive structures, and the remaining elastic components are non-conductive structures.

20. The application device according to claim 18, characterized in that There are multiple elastic component groups, and the multiple elastic component groups are arranged at intervals along the height direction of the vibration unit. All the elastic components of each elastic component group are located in the same horizontal plane.

21. The application device according to claim 16, characterized in that: The application device is a sound-generating device, the sound-generating device comprises a bracket, the vibration unit comprises 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; 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 connection portion is connected to the drag cup, and the second connection portion is connected to the bracket; And / or, the bracket is a housing or a yoke.

22. The application device according to claim 16, characterized in that: The application device is a sound-generating device, a motor or a multifunctional vibration device.

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