Shrapnel and application device

Abstract

The application discloses a spring sheet and an application device, wherein the spring sheet is in a non-winding structure, and comprises a first connecting part, a second connecting part and a deformation part connected between the first connecting part and the second connecting part; the first connecting part and the second connecting part are connected to different parts respectively, and the different parts can relatively move in a first direction or are relatively static; and part of the structure of the deformation part forms at least two elastic supporting parts which are isolated from each other, and the rest of the structure of the deformation part is in a narrow and long structure. The spring sheet can reduce the magnetic leakage of the application device, reduce the cost of the application device, inhibit the torsion of the spring sheet in the vibration process, provide greater centering force, effectively inhibit the resonance strength of the spring sheet, and avoid the risk of breakage without obvious resonance of the spring sheet.

Description

Technical Field

[0001] This invention relates to the field of electroacoustic technology, and in particular to a spring and its application device. Background Technology

[0002] Application devices, such as loudspeakers, are important acoustic components in electronic devices, serving as transducers that convert electrical signals into sound signals. Currently, with continuous technological advancements and innovations, the structural design of traditional loudspeakers is constantly evolving, needing to meet the trend towards thinner designs while increasingly focusing on performance optimization, and simultaneously simplifying manufacturing processes and controlling costs.

[0003] To address the issues of the centering support affecting voice coil vibration and its tendency to break, the applicant proposed a planar spring, such as the elastic component and application device disclosed in application number 202010458489.2. This elastic component is a planar spring. The planar spring design not only increases fatigue strength and reduces the risk of breakage but also does not affect the vibration of the resonating unit, thus optimizing product performance. However, the planar spring design has a significant span in the circumferential direction of the voice coil. Because the planar spring uses a narrow and long winding structure, it increases the overall size of the spring. Both the U-shaped iron and the frame need to be slotted to accommodate the planar spring. The large size of the planar spring leads to the circumferential angle of the slot in a single U-shaped iron reaching 30°–45°. The total angle of all slots accounts for 33%–50% of the entire U-shaped iron circumference. This excessively large slot ratio results in magnetic leakage of 9%–15% in the U-shaped iron. High magnetic leakage leads to low magnet utilization, and to compensate for the leakage, a larger U-shaped iron is usually required, resulting in higher costs. Furthermore, the planar spring is also prone to high resonance intensity. Summary of the Invention

[0004] The main objective of this invention is to propose a spring and its application device, which aims to solve the problem that the planar spring in the prior art causes large leakage magnetic field and high resonance intensity in the application device.

[0005] To achieve the above objectives, the present invention proposes a spring sheet, which has a non-winding structure. The spring sheet includes a first connecting part, a second connecting part, and a deformable part connected between the first connecting part and the second connecting part. The first connecting part and the second connecting part are respectively connected to different components. The different components can move relative to each other along a first direction, or the different components can be relatively stationary.

[0006] The deformable portion forms at least two mutually isolated elastic supports, while the remaining structure of the deformable portion is a narrow and elongated structure.

[0007] Optionally, the deformable portion is an arc-shaped structure that protrudes along the first direction, and the deformable portion extends from the first connecting portion to the second connecting portion.

[0008] Optionally, the deformable portion includes a first deformable segment and a second deformable segment connected to each other. The end of the first deformable segment away from the second deformable segment is connected to the first connecting portion, and the end of the second deformable segment away from the first deformable segment is connected to the second connecting portion. The first deformable segment has a narrow and long structure, and the second deformable segment forms at least two elastic supports.

[0009] Optionally, the width of the first deformable segment is B1, and the sum of the widths of at least two elastic supports is B2, wherein 0.7 ≤ B2 / B1 ≤ 1.5.

[0010] Optionally, the sum of the widths of at least two elastic supports is equal to the width of the first deformed segment.

[0011] Optionally, the number of elastic supports is two, and the maximum distance between the two elastic supports is greater than the width of the first deformable segment.

[0012] Optionally, each of the elastic supports is an arc-shaped piece that protrudes in a direction away from the other elastic support.

[0013] Optionally, the two elastic supports are axially symmetrically distributed.

[0014] Optionally, the midpoint of the connection position between the two elastic supports and the first deformation segment is directly opposite to the midpoint of the connection position between the two elastic supports and the second connecting part, and the line connecting the two forms the axis of symmetry of the two elastic supports.

[0015] Optionally, the maximum distance between each of the elastic supports and the axis of symmetry is greater than the width of the elastic support.

[0016] Optionally, the length of the projection area of ​​the second deformed segment projected perpendicularly onto the reference surface is L1, and the length of the projection area of ​​the deformed part projected perpendicularly onto the reference surface is L2, wherein 0.4≤L1 / L2≤0.9, and the reference surface is a plane arranged perpendicular to the first direction.

[0017] Optionally, the length of the projection area of ​​the spring piece projected perpendicularly onto the reference surface is L, and the maximum distance between the deformed part and the reference surface is H, wherein 0.3≤H / L≤0.75, and the reference surface is a plane arranged perpendicular to the first direction.

[0018] Optionally, all the elastic supports are provided with equal width; and / or, at least two of the elastic supports have equal width.

[0019] Optionally, the first connecting portion, the deformable portion, and the second connecting portion are located on different planes, and the first connecting portion is arranged along the first direction, the second connecting portion is arranged along the second direction, and the first direction and the second direction are perpendicular to each other.

[0020] Optionally, the thickness of the spring is 0.1 mm to 0.3 mm; and / or, the width of the spring is 1 mm to 4 mm.

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

[0022] The present invention also proposes an application device, the application device comprising a vibration unit and a spring sheet as described in any of the above claims, the spring sheet being used to balance the vibration of the vibration unit along the first direction.

[0023] Optionally, the application device includes a spring group, which includes at least three springs evenly spaced circumferentially along the vibration unit.

[0024] Optionally, at least three of the spring clips have the same structure.

[0025] 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 part is connected to the voice coil, and the second connecting part is connected to the bracket;

[0026] Alternatively, the vibrating unit includes a diaphragm, a voice coil, and a cup, with the voice coil and the cup connected to the same side of the diaphragm, the first connecting part connected to the cup, and the second connecting part connected to the bracket;

[0027] And / or, the support is a shell or a magnetic yoke.

[0028] Optionally, the bracket is a housing, the magnetic yoke is located between the housing and the voice coil, and the magnetic yoke has clearance grooves for the remaining structure of the corresponding deformable part to pass through at the positions of each of the spring pieces.

[0029] Optionally, the plurality of clearance slots are distributed at intervals along the circumference of the yoke, and the sum of the circumferential angles of the plurality of clearance slots along the yoke accounts for 15% to 35% of the total circumferential angle of the yoke.

[0030] Optionally, the application device is a sound-generating device, a motor, or a multifunctional vibration device.

[0031] Compared to planar springs, the spring of the present invention has a non-winding structure, so that the spring does not have a large span in the circumferential direction of the voice coil. Correspondingly, the clearance groove opened on the magnetic yoke allows the other structures with narrow and long structures on the deformation part of the corresponding spring to pass through. The opening angle and size of the clearance groove are also smaller. Smaller openings result in less magnetic leakage, higher magnetic yoke utilization, and the size of the magnetic yoke can be reduced accordingly, resulting in lower cost.

[0032] Furthermore, the deformable portion of the spring sheet of the present invention forms at least two mutually isolated elastic supports. That is, the deformable portion is not a single piece, but rather a portion of the structure is made into at least two mutually isolated elastic supports. Understandably, these at least two elastic supports can avoid the location of the clearance groove and do not affect the groove's opening angle and size. The spring sheet also constrains the reciprocating vibration of the vibration unit according to its vibration offset state through the elastic deformation of its deformable portion, preventing the polarization of the vibration unit and making the reciprocating vibration of the vibration unit more stable, with better centering ability. Moreover, since the deformable portion can form at least two mutually isolated elastic supports, the stress in the deformable portion can be reduced, and during vibration, the spring sheet can be simultaneously suppressed by the at least two elastic supports, suppressing the torsion of the spring sheet during vibration and providing greater centering force. At the same time, the deformable portion with at least two elastic supports can effectively suppress the resonance intensity of the spring sheet, preventing significant resonance and avoiding the risk of breakage. Attached Figure Description

[0033] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0034] Figure 1 This is a three-dimensional schematic diagram of a spring sheet according to an embodiment of the present invention;

[0035] Figure 2 This is a side view of a spring sheet according to an embodiment of the present invention;

[0036] Figure 3 This is a top view of a spring clip according to an embodiment of the present invention;

[0037] Figure 4 This is a perspective view of an application device according to an embodiment of the present invention;

[0038] Figure 5 This is a cross-sectional schematic diagram of an application device according to an embodiment of the present invention;

[0039] Figure 6This is a three-dimensional schematic diagram of the voice coil, spring, and magnetic circuit system in an application device according to an embodiment of the present invention;

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

[0041] Figure 8 This is a schematic diagram illustrating the suppression of resonance intensity by the spring sheet of the present invention;

[0042] Figure 9 This is a schematic diagram of a planar spring suppressing resonance intensity, as disclosed in application number 202010458489.2.

[0043] Explanation of icon numbers:

[0044]

[0045]

[0046] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0047] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0048] It should be noted that if the embodiments of the present invention involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0049] Furthermore, if the embodiments of this invention involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. If the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0050] This invention proposes a spring clip.

[0051] like Figures 1 to 7 As shown, the spring 10 in this embodiment has a non-winding structure. The spring 10 includes 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 different components. The different components can move relative to each other in a first direction, or the different components can be relatively stationary. Part of the structure of the deformation part 13 forms at least two mutually isolated elastic supports 130, and the remaining structure of the deformation part 13 is a narrow and long structure.

[0052] The spring 10 of this embodiment is applied in an application device 100 such as a sound-generating device, a motor, or a multifunctional vibration device. This embodiment uses the application of the spring 10 in a sound-generating device as an example for explanation. The sound-generating device includes the spring 10 and a vibration unit 40. The spring 10 is used to balance the vibration of the vibration unit 40 along a first direction. The sound-generating device also includes a support 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 spring 10 is connected to the voice coil 20, and the second connecting portion 12 is connected to the support 70. The support 70 may be a housing or a magnetic yoke 52. In another embodiment, the vibration unit 40 includes a diaphragm 60, a voice coil 20, and a cup 80. The voice coil 20 and the cup 80 are connected to the same side of the diaphragm 60. The first connecting portion 11 is connected to the cup 80, and the second connecting portion 12 is connected to the support 70. The support 70 may be a housing or a magnetic yoke 52.

[0053] Understandably, after the vibration unit 40 is connected to an electrical signal, it can vibrate in the vertical direction within the housing, wherein the vertical direction is based on... Figure 5 The direction shown is used as a reference; the vibration direction of the vibration unit 40 is represented by the vertical or up-down direction, and the direction perpendicular to the vibration of the vibration unit 40 is represented by the horizontal direction. For example... Figures 1 to 6 As shown, 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 wire wound around the frame. The first connecting portion 11 can be connected to either the frame or the voice coil wire. The second connecting portion 12 of the spring 10 is connected to the housing, realizing the assembly between the voice coil 20, the spring 10, and the housing. Figure 7 As shown, in another embodiment, the first connecting part 11 is connected to the cup holder 80, and the second connecting part 12 is connected to the outer shell. In other embodiments, the first connecting part 11 is connected to the cup holder 80, and the second connecting part 12 is connected to the yoke 52; or, the first connecting part 11 is connected to the voice coil 20, and the second connecting part 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 for 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 attached below the diaphragm 60; the magnetic circuit system 50 includes an upper magnetic guide plate, a magnet, and a lower magnetic guide plate, wherein the upper and lower magnetic guide plates are magnetically conductive structures used to correct the magnetic lines of force generated by the magnet, and the magnetic circuit system 50 forms a magnetic gap 51, in which the voice coil 20 is disposed. The lower magnetic guide plate of the present invention can be a U-shaped structure, including a bottom wall and side walls, and a magnetic gap 51 is formed between the upper magnetic guide plate, the magnet, and the side walls of the lower magnetic guide plate, forming a relatively uniform magnetic field in the magnetic gap 51, in which the voice coil 20 is disposed. 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. 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, when the voice coil 20 vibrates up and down according to the electrical signal, it will also drive 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 change during the vibration process. Furthermore, the magnetic field lines on the upper side of the magnetic gap 51 are arc-shaped. Therefore, the Ampere force on the voice coil 20 is not only in the vertical direction, but also includes Ampere forces in other directions. This causes the voice coil 20 to be prone to non-vertical polarization during the vibration process, which will further affect the vibration of the diaphragm 60.

[0056] To prevent the aforementioned polarization, a spring piece 10 connecting the voice coil 20 and the support 70 is provided to center and support the polarization of the voice coil 20, that is, to ensure that the voice coil 20 vibrates along the vibration direction within the magnetic gap 51. In one embodiment, the spring piece 10 is a centering support piece.

[0057] In one embodiment, the vibration unit 40 further includes a cup 80 disposed on the diaphragm 60, which is connected to the voice coil 20 on the same side of the diaphragm 60. When there is a magnetic gap 51, the cup 80 is located outside the magnetic gap 51. The spring piece 10 that connects the cup 80 and the support 70 can also center and support 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 support 70 is either a housing or a magnetic yoke 52. Since the housing can be used to support the individual sound-generating device, setting the support 70 as a housing facilitates the fixing of the side of the spring piece 10 away from the vibration unit 40, thus improving the centering support effect of the spring piece 10. Since most of the vibration unit 40 is close to the magnetic gap 51, and its distance from the magnetic yoke 52 is relatively short, connecting the side of the spring piece 10 away from the vibration unit 40 to the magnetic yoke 52 can save the installation distance of the spring piece 10 and improve the centering support effect of the spring piece 10. It should be noted that, as described above, the fixing method of the spring 10 in this embodiment includes a variety of combinations: the first connecting part 11 and the second connecting part 12 of the spring 10 are respectively connected to the voice coil 20 and the outer shell; or, the first connecting part 11 and the second connecting part 12 of the spring 10 are respectively connected to the voice coil 20 and the magnetic yoke 52; or, the first connecting part 11 and the second connecting part 12 of the spring 10 are respectively connected to the cup 80 and the outer shell; or, the first connecting part 11 and the second connecting part 12 of the spring 10 are respectively connected to the cup 80 and the magnetic yoke 52. All of these can better ensure the centering and support effect of the spring 10.

[0059] In this embodiment, a portion of the deformable portion 13 forms at least two mutually isolated elastic supports 130, while the remaining structure of the deformable portion 13 is a narrow and elongated structure. Specifically, the first direction is the vertical direction, which can be represented by the vertical direction or the up-down direction.

[0060] In one embodiment, the support 70 is a housing, and the magnetic yoke 52 is located between the housing and the voice coil 20. The magnetic yoke 52 has clearance grooves 521 at the positions of each spring piece 10, allowing the remaining structures of the corresponding deformable portion 13 to pass through. Specifically, the remaining structures of the deformable portion 13 with a narrow and elongated shape pass through the corresponding clearance grooves 521. The first connecting portion 11 of the spring piece 10 is connected to the voice coil 20, the remaining structures of the deformable portion 13 with a narrow and elongated shape pass through the corresponding clearance grooves 521, and the second connecting portion 12 is connected to the housing. Specifically, the magnetic yoke 52 is a U-shaped iron, and clearance grooves 521 are provided on the sidewall of the magnetic yoke 52 for the remaining structures of the corresponding deformable portion 13 with a narrow and elongated shape to pass through.

[0061] Compared to planar springs, the spring piece 10 in this embodiment has a non-winding structure, so that the spring piece 10 does not have a large span in the circumferential direction of the voice coil 20. Correspondingly, the clearance groove 521 opened on the magnetic yoke 52 allows the other structures with narrow and long structures on the deformation part 13 of the corresponding spring piece 10 to pass through. The opening angle and size of the clearance groove 521 are also smaller. Smaller openings result in less magnetic leakage, higher utilization of the magnetic yoke 52, and the size of the magnetic yoke 52 can be reduced accordingly, resulting in lower cost.

[0062] Furthermore, a portion of the deformable portion 13 forms at least two mutually isolated elastic supports 130. That is, the deformable portion 13 is not a single piece, but rather a portion of its structure is formed into at least two mutually isolated elastic supports 130. Understandably, these at least two elastic supports 130 can avoid the position of the clearance groove 521, without affecting the slotting angle and size of the clearance groove 521. The spring piece 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 deformable portion 13, preventing the polarization of the vibration unit 40 and making the reciprocating vibration of the vibration unit 40 more stable, with better centering ability. Moreover, since a portion of the deformable portion 13 can form at least two mutually isolated elastic supports 130, the stress in the deformable portion 13 can be reduced, and during vibration, the spring piece 10 can be simultaneously suppressed by the at least two elastic supports 130, suppressing the torsion of the spring piece 10 during vibration and providing greater centering force. Meanwhile, the deformation portion 13 with at least two elastic supports 130 can effectively suppress the resonance intensity of the spring piece 10, and the spring piece 10 does not have obvious resonance, thus avoiding the risk of breakage.

[0063] Furthermore, the deformable portion 13 is an arc-shaped structure protruding along the first direction, and the deformable portion 13 extends from the first connecting portion 11 to the second connecting portion 12. The first connecting portion 11, the deformable portion 13, and the second connecting portion 12 are located on different planes, that is, the spring 10 in this embodiment is a non-planar spring, and the first connecting portion 11 is arranged along the first direction, that is, the first connecting portion 11 is arranged along the vertical direction, and the second connecting portion 12 is arranged along the second direction. 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 can be substantially parallel to the horizontal direction. This embodiment is described with the second direction being horizontal as an example, and the second connecting portion 12 is arranged horizontally.

[0064] Understandably, when the spring 10 is assembled with the voice coil 20 or the bracket 70, the first connecting part 11 of the spring 10 can contact the pad of the voice coil 20, and the second connecting part 12 can contact the pad of the bracket 70. Solder paste is applied, and laser welding melts the solder paste to fix the first connecting part 11 to the pad of the voice coil 20 and the second connecting part 12 to the pad of the bracket 70, thus realizing the assembly of the spring 10 with the voice coil 20 and the bracket 70. Since the first connecting part 11 of the spring 10 is arranged vertically and the deformation part 13 protrudes vertically, the first connecting part 11 and the deformation part 13 are not affected by the vertical vibration of the vibration unit 40. Therefore, this part of the structure is not subjected to rotational force, has good fatigue resistance, and is less likely to experience solder joint breakage or detachment of the pads of the spring 10 and the voice coil 20, ensuring the effectiveness and high reliability of the assembly between the spring 10 and the voice coil 20. Furthermore, the deformation portion 13 extends from the first connecting portion 11 to the second connecting portion 12, which reduces stress concentration in the deformation portion 13, increases fatigue strength, and reduces the risk of breakage of the spring piece 10. Moreover, since the deformation portion 13 is a vertically convex arc-shaped structure, even when the vibration unit 40 moves vertically with the spring piece 10, the deformation portion 13 can effectively suppress the resonance intensity of the spring piece 10, avoiding the risk of breakage, and the compliance of the spring piece 10 remains good, providing sufficient displacement without affecting the vibration of the vibration unit 40, thus optimizing product performance.

[0065] In one embodiment, the deformable portion 13 includes a first deformable segment 131 and a second deformable segment 132 connected to each other. The end of the first deformable segment 131 away from the second deformable segment 132 is connected to the first connecting portion 11, and the end of the second deformable segment 132 away from the first deformable segment 131 is connected to the second connecting portion 12. The first deformable segment 131 has a narrow and long structure, and the second deformable segment 132 forms at least two elastic supports 130.

[0066] Understandably, the second deformation segment 132 is part of the structure of the aforementioned deformation part 13, and the first deformation segment 131 is the remaining structure of the aforementioned narrow and elongated deformation part 13. This arrangement results in a narrow and elongated structure on the deformation part 13 near the voice coil 20, allowing it to pass through the corresponding clearance groove 521, resulting in less magnetic leakage. Meanwhile, the section farther from the voice coil 20 forms at least two elastic supports 130, achieving better centering capability and effectively suppressing the resonance intensity of the spring 10. The structural design is reasonable and ingenious.

[0067] In one embodiment, the width of the first deformable segment 131 is B1, and the sum of the widths of at least two elastic supports 130 is B2, wherein 0.7 ≤ B2 / B1 ≤ 1.5, making the width of the first deformable segment 131 and the solid width of the second deformable segment 132 relatively close, preventing uneven stress distribution and making the deformable part 13 less prone to fracture. Furthermore, the sum of the widths of at least two elastic supports 130 is equal to the width of the first deformable segment 131, thereby making the width of the first deformable segment 131 and the solid width of the second deformable segment 132 equal, which facilitates uniform stress distribution and protects the deformable part 13 from fracture. It should be noted that the ratio of B2 to B1 can be flexibly set according to actual conditions. In one embodiment, B2 / B1 = 0.85; in another embodiment, B2 / B1 = 1; and in yet another embodiment, B2 / B1 = 1.15.

[0068] In a preferred embodiment, there are two elastic supports 130, and the maximum distance between the two elastic supports 130 is greater than the width of the first deformable segment 131. For example... Figure 1 , Figure 3 , Figure 4 , Figure 6 As shown, since the two elastic supports 130 are isolated from each other, there is a gap between the two elastic supports 130. The maximum distance between the two elastic supports 130, that is, the maximum gap, is greater than the width of the first deformation segment 131. This makes the two elastic supports 130 have sufficient gap, resulting in better torsional resistance, reduced stress in the deformation segment 13, better centering ability, and ability to suppress resonance.

[0069] In one embodiment, each elastic support 130 is an arc-shaped piece and protrudes in a direction away from the other elastic support 130. That is, both elastic supports 130 protrude in opposite directions. From the first connecting part 11 to the second connecting part 12, the gap between the two elastic supports 130 increases from small to large and decreases from large to small at the maximum point, which is conducive to the uniform distribution of stress and effectively suppresses resonance, while providing better centering ability.

[0070] Furthermore, the two elastic supports 130 are axially symmetrically distributed, which further improves the uniformity and symmetry of stress distribution, effectively suppresses resonance, and provides better centering capability.

[0071] In one embodiment, the midpoint of the connection position between the two elastic supports 130 and the first deformable segment 131 is directly opposite to the midpoint of the connection position between the two elastic supports 130 and the second connecting portion 12, and the line connecting the two forms the axis of symmetry of the two elastic supports 130. Figure 3As shown, the double-dotted line represents the axis of symmetry. The midpoint between the connection points of the two elastic supports 130 and the first deformation segment 131 is point O, and the midpoint between the connection points of the two elastic supports 130 and the second connecting part 12 is point P. It can be understood that point O is the starting point of the second deformation segment 132, and point P is the midpoint of the second deformation segment 132. Point O and point P are set opposite each other, that is, the starting point and the ending point of the second deformation segment 132 are set opposite each other, and the line connecting the starting point and the ending point forms the axis of symmetry of the two elastic supports 130. The structural design is reasonable and achieves uniformity and symmetry of stress distribution.

[0072] Furthermore, the maximum distance between each elastic support 130 and the axis of symmetry is greater than the width of the elastic support 130, and the maximum distance between two elastic supports 130 is greater than the sum of the widths of the two elastic supports 130. This makes the maximum gap greater than the solid width of the second deformation segment 132, thereby ensuring sufficient gap between the two elastic supports 130, resulting in better torsional resistance, reduced stress in the deformation segment 13, better centering ability, and the ability to suppress resonance.

[0073] In one embodiment, the length of the projection area of ​​the second deformed segment 132 perpendicularly projected onto the reference plane is L1, and the length of the projection area of ​​the deformed part 13 perpendicularly projected onto the reference plane is L2, wherein 0.4 ≤ L1 / L2 ≤ 0.9, and the reference plane is a plane arranged perpendicular to the first direction, that is, the reference plane is a horizontal plane, such as... Figure 2 As shown, the reference plane is Figure 2 The C-reference plane is represented by the dashed line. The length of the projection area of ​​the second deformation segment 132 projected perpendicularly onto the reference plane is L1, that is, the projection length of the second deformation segment 132 is L1. The length of the projection area of ​​the deformation part 13 projected perpendicularly onto the reference plane is L2, that is, the projection length of the deformation part 13 is L2. In a preferred embodiment, 0.4≤L1 / L2≤0.9, so that the second deformation segment 132 occupies a sufficient length on the deformation part 13, thereby achieving sufficient length on the deformation part 13 to form at least two elastic supports 130, that is, achieving sufficient length on the deformation part 13 for bifurcation, so as to effectively reduce the stress of the deformation part 13, achieve better centering ability and suppress resonance.

[0074] In one embodiment, the length of the projection area of ​​the spring piece 10 projected perpendicularly onto the reference surface is L, and the maximum distance between the deformable part 13 and the reference surface is H, wherein 0.3 ≤ H / L ≤ 0.75, and the reference surface is a plane arranged perpendicular to the first direction. It can be understood that the length of the projection area of ​​the spring piece 10 projected perpendicularly onto the reference surface is L, that is, the projection length of the spring piece 10 is L, indicating the lateral span of the spring piece 10. The maximum distance between the deformable part 13 and the reference surface is H, that is, the height difference between the highest point of the deformable part 13 in the vertical direction and the reference surface is H, indicating the vertical span of the spring piece 10. 0.3 ≤ H / L ≤ 0.75 indicates that the aspect ratio of the spring piece 10 is in the range of 0.3 to 0.75, and the lateral extension length of the spring piece 10 is greater than its height, indicating a reasonable structural design. In a preferred embodiment, H / L = 0.4, or H / L = 0.5, or H / L = 0.6.

[0075] In one embodiment, each elastic support 130 is provided with an equal width, and the stress distribution on the same elastic support 130 is uniform. And / or, at least two elastic supports 130 have equal widths, thereby achieving uniform stress distribution between at least two elastic supports 130.

[0076] In one embodiment, the thickness of the spring piece 10 is 0.1 mm to 0.3 mm; and / or, the width of the spring piece 10 is 1 mm to 4 mm. In a preferred embodiment, the spring piece 10 is designed with equal thickness and width, which facilitates manufacturing. It is understood that since the spring piece 10 is designed with bifurcations at at least two elastic supports 130, the width of the spring piece 10 at the corresponding two elastic supports 130 refers to the sum of the widths of all elastic supports 130. The thickness and width of the spring piece 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 spring piece 10 can be selected as 0.1 mm, 0.15 mm, or 0.2 mm, meaning it can be made from standard sheet metal. When Kms = 0.10 N / mm, the thickness of the spring 10 can be 0.1 mm and the width can be 2.0 mm; when Kms = 0.43 N / mm, the thickness of the spring 10 can be 0.15 mm and the width can be 2.6 mm; when Kms = 1.18 N / mm, the thickness of the spring 10 can be 0.2 mm and the width can be 3 mm.

[0077] In one embodiment, the spring 10 is made of any one of phosphor bronze, iron, steel or alloy materials, which 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, enabling the application device 100 to work in harsh environments, optimizing product performance and improving the application device 100's versatility.

[0078] Compared with the planar spring disclosed in application number 202010458489.2, the spring piece 10 of the present invention not only has less magnetic leakage, but also better centering ability and can effectively suppress the resonance intensity of the spring piece 10. Furthermore, the spring piece 10 has a smaller cross-sectional area and lower mass, effectively reducing the vibration mass of the vibration unit 40 and improving sensitivity. Table 1 below compares the centering ability and mass between the spring piece 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 leakage between the spring piece 10 of the present invention and the planar spring disclosed in application number 202010458489.2 under the same K value. In both Table 1 and Table 2, a spring piece 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 used in the planar spring disclosed in application number 202010458489.2.

[0079] Figure 8 This is a schematic diagram of how the spring piece 10 of the present invention suppresses resonance intensity. Figure 9 The diagram below illustrates the suppression of resonance intensity by a planar spring, as disclosed in application number 202010458489.2. Figure 8 and Figure 9 The comparison shows 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.

[0080] List 1:

[0081]

[0082] List 2:

[0083]

[0084] This invention also proposes an application device 100, which can be a sound-generating device, a motor, or a multifunctional vibration device, with a wide range of applications. This invention will be described using the application device 100 as a sound-generating device. The application device 100 includes a vibration unit 40 and the aforementioned spring 10, the spring 10 being used to balance the vibration of the vibration unit 40 along a first direction. There can be one or more vibration units 40, which can be arranged vertically or horizontally. The application device 100 further includes a support 70. In one embodiment, the vibration unit 40 includes a diaphragm 60 and a voice coil 20 connected to the diaphragm 60; a first connecting part 11 is connected to the voice coil 20, and a second connecting part 12 is connected to the support 70, and / or, the support 70 is a shell or a magnetic yoke 52; or, in another embodiment, the vibration unit 40 includes a diaphragm 60, a voice coil 20, and a cup 80, with the voice coil 20 and the cup 80 connected to the same side of the diaphragm 60, the first connecting part 11 connected to the cup 80, and the second connecting part 12 connected to the support 70, and / or, the support 70 is a shell or a magnetic yoke 52. The specific structure of the spring piece 10 in the application device 100 is as described in the above embodiments. Since the application device 100 adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, and will not be described in detail here.

[0085] like Figures 4 to 7 As shown, the application device 100 in this embodiment includes a spring sheet group 30, which includes at least three spring sheets 10 evenly spaced along the circumference of the vibrating unit 40. In one embodiment, the number of spring sheets 10 is three, and the three spring sheets 10 are evenly spaced along the outer periphery of the vibrating unit 40, which enhances the centering effect of the vibrating unit 40. Specifically, when the vibrating unit 40 vibrates vertically, the at least three spring sheets 10 form at least three constraints on the voice coil 20, which can prevent the vibrating unit 40 from being polarized, and the spring sheets 10 follow the vertical displacement of the vibrating unit 40, thus enhancing the centering effect of the vibrating unit 40. In other embodiments, the number of spring sheets 10 in the spring sheet group 30 can also be four, five, six, or other numbers. In a preferred embodiment, the number of spring sheets 10 in the spring sheet group 30 is preferably three or four. The number of spring sheets 10 in the application device 100 of the present invention can be flexibly adjusted according to the actual situation, and the present invention does not limit the number of spring sheets 10.

[0086] In a preferred embodiment, at least three spring pieces 10 have the same structure, and the protrusion direction of the deformation part 13 in at least three spring pieces 10 is consistent. This not only facilitates manufacturing and assembly, but also ensures the consistency of the centering effect of multiple spring pieces 10 on the vibration unit 40, thereby improving the product performance of the application device 100.

[0087] In one embodiment, the bracket 70 is a housing, and the magnetic yoke 52 is located between the housing and the voice coil 20. The magnetic yoke 52 has clearance grooves 521 at the positions of each spring piece 10 for the other structures of the corresponding deformation part 13 to pass through.

[0088] Multiple clearance slots 521 are distributed at intervals along the circumference of the yoke 52, and the sum of the circumferential angles of the multiple clearance slots 521 along the yoke 52 accounts for 15% to 35% of the total circumferential angle of the yoke 52. Understandably, the number of clearance slots 521 corresponds to the number of spring pieces 10 and is set in a one-to-one manner. The total circumferential angle of the yoke 52 is 360°, and the sum of the circumferential angles of the multiple clearance slots 521 along the yoke 52 accounts for 15% to 35% of the total circumferential angle of the yoke 52, that is, the sum of the circumferential angles of the multiple clearance slots 521 along the yoke 52 is 54° to 126°. In one embodiment, there are four spring pieces 10, and the magnetic yoke 52 has four clearance slots 521. The sum of the circumferential angles of the four clearance slots 521 along the magnetic yoke 52 accounts for about 32% of the total circumferential angle of the magnetic yoke 52, that is, the sum of the circumferential angles of the four clearance slots 521 along the magnetic yoke 52 is about 115.2°. The sum of the circumferential angles of the four spring pieces 10 along the magnetic yoke 52 accounts for about 11% of the total circumferential angle of the magnetic yoke 52, that is, the sum of the circumferential angles of the four spring pieces 10 along the magnetic yoke 52 is about 39.6°. The angle of each clearance slot 521 is greater than the angle of the corresponding spring piece 10, so that the size of the clearance slot 521 is greater than the width of the corresponding spring piece 10. The spring piece 10 has sufficient clearance space in the clearance slot 521 to avoid affecting the vibration of the spring piece 10, and thus will not affect the vibration of the vibration unit 40.

[0089] The size of the spring 10 of this invention can be flexibly adjusted according to the power of the application device 100 and the vibration displacement of its voice coil 20. A spring 10 with a thickness greater than 0.1mm and less than or equal to 0.25mm can be applied to large loudspeakers with a voice coil 20 vibration displacement of 1mm to 15mm, and is even more suitable for large loudspeakers with a voice coil 20 vibration displacement of 3mm to 7mm. The width of the spring 10 can be adjusted according to the K value. It should be noted that in miniature loudspeakers, the vibration displacement of the voice coil 20 is less than 1mm. In large loudspeakers, the vibration displacement of the voice coil 20 is greater than 1mm. In this embodiment, the vibration displacement of the voice coil 20 can be selected as 1mm to 15mm, that is, the application device 100 is a large loudspeaker. Optionally, the vibration displacement of the voice coil 20 can be 1mm, 2mm, 3mm, 4mm, 5mm, 6mm, 7mm, 8mm, 9mm, 10mm, 11mm, 12mm, 13mm, 14mm, 15mm, etc., and is not limited here. The vibration displacement of the voice coil 20 refers to the stable displacement during the normal operation of the application device 100, excluding the situation where the voice coil 20 receives an abnormal current or other abnormal conditions occur in the application device 100, which causes a sudden change in the displacement of the voice coil 20.

[0090] In one embodiment, the voice coil 20 has a diameter of 14mm to 28mm, and the outer shell has a circular cone structure with a large end diameter of 40mm to 75mm. This design is reasonable, easy to manufacture, and better meets practical needs, making it widely applicable. Furthermore, to ensure that the spring 10 does not experience fatigue fracture, the ratio of the length of the projection area of ​​the spring 10 on the horizontal plane to the displacement of the vibrating unit 40 should be greater than 3.5, making it suitable for use in ultra-thin loudspeakers.

[0091] The above are merely preferred embodiments of the present invention and do not limit the scope of the patent. Any equivalent structural transformations made using the contents of the specification and drawings of the present invention under the inventive concept of the present invention, or direct / indirect applications in other related technical fields, are included within the scope of patent protection of the present invention.

Claims

1. A spring clip, characterized in that, The spring sheet has a non-winding structure. The spring sheet includes a first connecting part, a second connecting part, and a deformable part connected between the first connecting part and the second connecting part. The first connecting part and the second connecting part are respectively connected to different components. The different components can move relative to each other along a first direction, or the different components can be relatively stationary. The deformable portion forms at least two mutually isolated elastic supports, while the remaining structure of the deformable portion is a narrow and elongated structure. The deformable portion is an arc-shaped structure that protrudes along the first direction, and the deformable portion extends from the first connecting portion to the second connecting portion.

2. The spring clip as described in claim 1, characterized in that, The deformable portion includes a first deformable segment and a second deformable segment connected to each other. The end of the first deformable segment away from the second deformable segment is connected to the first connecting portion, and the end of the second deformable segment away from the first deformable segment is connected to the second connecting portion. The first deformable segment has a narrow and long structure, and the second deformable segment forms at least two elastic supports.

3. The spring clip as described in claim 2, characterized in that, The width of the first deformable segment is B1, and the sum of the widths of the at least two elastic supports is B2, wherein 0.7 ≤ B2 / B1 ≤ 1.

5.

4. The spring clip as described in claim 3, characterized in that, The sum of the widths of at least two elastic supports is equal to the width of the first deformation segment.

5. The spring clip as described in claim 2, characterized in that, The number of elastic supports is two, and the maximum distance between the two elastic supports is greater than the width of the first deformation segment.

6. The spring clip as described in claim 5, characterized in that, Each of the elastic supports is an arc-shaped piece that protrudes in a direction away from the other elastic support.

7. The spring clip as described in claim 5, characterized in that, The two elastic supports are axially symmetrically distributed.

8. The spring clip as described in claim 7, characterized in that, The midpoint of the connection position between the two elastic supports and the first deformation segment is directly opposite to the midpoint of the connection position between the two elastic supports and the second connecting part, and the line connecting the two forms the axis of symmetry of the two elastic supports.

9. The spring clip as described in claim 8, characterized in that, The maximum distance between each of the elastic supports and the axis of symmetry is greater than the width of the elastic support.

10. The spring clip as described in claim 2, characterized in that, The length of the projection area of ​​the second deformed segment projected perpendicularly onto the reference surface is L1, and the length of the projection area of ​​the deformed part projected perpendicularly onto the reference surface is L2, wherein 0.4≤L1 / L2≤0.9, and the reference surface is a plane set perpendicular to the first direction.

11. The spring clip as described in claim 1, characterized in that, The length of the projection area of ​​the spring piece perpendicularly projected onto the reference surface is L, and the maximum distance between the deformed part and the reference surface is H, where 0.3≤H / L≤0.75, the reference surface is a plane set perpendicular to the first direction, and H represents the span of the spring piece along the first direction.

12. The spring clip as claimed in any one of claims 1 to 11, characterized in that, Each of the elastic supports is provided with an equal width; and / or, at least two of the elastic supports have the same width.

13. The spring clip as described in any one of claims 1 to 11, characterized in that, The first connecting portion, the deformable portion, and the second connecting portion are located on different planes, and the first connecting portion is arranged along the first direction, the second connecting portion is arranged along the second direction, and the first direction and the second direction are perpendicular to each other.

14. The spring clip as claimed in any one of claims 1 to 11, characterized in that, The thickness of the spring piece is 0.1mm to 0.3mm; and / or the width of the spring piece is 1mm to 4mm.

15. The spring clip as claimed in any one of claims 1 to 11, characterized in that, The shrapnel is made of any one of phosphor bronze, iron, steel, or alloy.

16. An application device, characterized in that, The application device includes a vibration unit and a spring sheet as described in any one of claims 1 to 15, the spring sheet being used to balance the vibration of the vibration unit along the first direction.

17. The application device as described in claim 16, characterized in that, The application device includes a spring sheet assembly, which includes at least three spring sheets evenly spaced circumferentially along the vibration unit.

18. The application device as described in claim 17, characterized in that, At least three of the aforementioned spring clips have the same structure.

19. The application device as described in claim 16, characterized in that, The application device is a sound-generating device, which includes a support frame and a vibration unit including a diaphragm and a voice coil connected to the diaphragm; the first connecting part is connected to the voice coil, and the second connecting part is connected to the support frame; Alternatively, the vibrating unit includes a diaphragm, a voice coil, and a cup, with the voice coil and the cup connected to the same side of the diaphragm, the first connecting part connected to the cup, and the second connecting part connected to the bracket; And / or, the support is a shell or a magnetic yoke.

20. The application device as described in claim 19, characterized in that, The bracket is a shell, the magnetic yoke is located between the shell and the voice coil, and the magnetic yoke has clearance grooves for the remaining structure of the corresponding deformable part to pass through at the positions of each of the spring pieces.

21. The application device as described in claim 20, characterized in that, The plurality of clearance slots are distributed at intervals along the circumference of the yoke, and the sum of the circumferential angles of the plurality of clearance slots along the yoke accounts for 15% to 35% of the total circumferential angle of the yoke.

22. The application device as described in claim 16, characterized in that, The application device is a sound-generating device, a motor, or a multi-functional vibration device.

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