Moving-iron loudspeaker and earphone

Abstract

The moving-iron loudspeaker comprises a substrate, a first voice coil, a second voice coil, a vibrating diaphragm and a moving rod, the first voice coil and the second voice coil are arranged on the substrate at an interval along a first direction, the vibrating diaphragm and the second voice coil are arranged at an interval along a second direction, the second direction intersects with the first direction, and the moving rod is arranged on the substrate. The movable rod comprises a movable part, a supporting part and a connecting part, the connecting part is connected to the vibrating diaphragm, the movable part movably penetrates through the second voice coil in the first direction, the supporting part is connected between the movable part and the connecting part, and the first voice coil and the second voice coil are used for driving the movable part to move in the first direction and driving the supporting part to move under the action of a magnetic field; and the vibrating diaphragm is driven to vibrate. According to the moving-iron loudspeaker, the moving part moves in the first direction to drive the arc-shaped part and the supporting part to deform, so that the vibrating diaphragm vibrates in the second direction, the vibration area can be adjusted according to the moving range of the moving part, the universality of the moving-iron loudspeaker is improved, and the moving-iron loudspeaker can be suitable for various earphones.

Description

Technical Field

[0001] This utility model relates to the technical field of loudspeakers, and more particularly to a moving iron loudspeaker and headphones. Background Technology

[0002] In related technologies, with the advancement of science and technology and the continuous improvement of people's living standards, electronic products are becoming increasingly popular, and consumers' demands for electronic products are also increasing. Currently, headphones are widely used in people's daily lives and work.

[0003] In the related technology of moving iron speakers, a changing current flows to the magnet, turning the magnet into an electromagnet. Through the continuous change of the current direction, the electromagnet moves back and forth in the magnetic field, causing the diaphragm to vibrate back and forth to produce sound. Therefore, moving iron speakers require a magnet to drive the diaphragm to vibrate, which takes up a lot of space. Furthermore, the amplitude and area of ​​the vibration are difficult to adjust by using a magnet to drive the diaphragm to vibrate, resulting in poor versatility. Utility Model Content

[0004] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a moving iron speaker that is applicable to various headphone devices and has strong versatility.

[0005] This utility model also proposes an earphone with the aforementioned moving iron speaker.

[0006] A moving-iron horn according to a first aspect of the present invention includes: a substrate, a first voice coil, a second voice coil, a diaphragm, and a moving rod. The first and second voice coils are spaced apart on the substrate along a first direction. The diaphragm is spaced apart from the second voice coil along a second direction, the second direction intersecting the first direction. The moving rod includes a movable part, a support part, and a connecting part. The connecting part is connected to the diaphragm. The movable part is movably inserted through the second voice coil along the first direction. The support part is connected between the movable part and the connecting part. The first and second voice coils are used to drive the movable part to move along the first direction and move the support part under the action of a magnetic field, thereby driving the diaphragm to vibrate.

[0007] The moving iron speaker according to the present invention has at least the following beneficial effects: When current passes through the first voice coil and the second voice coil, a magnetic field is generated, thereby generating different magnetic poles (south magnetic pole S and north magnetic pole N) on both sides of the first voice coil. The movable part of the moving rod in the second voice coil generates different magnetic poles (south magnetic pole S and north magnetic pole N) on both sides of the moving rod. The moving part is driven by magnetism to move in the second voice coil along the first direction. When the moving part moves along the first direction, the support part and the connecting part are deformed, thereby causing the diaphragm to vibrate in the second direction for sound production. By eliminating the method of driving the diaphragm to vibrate with a magnet, the moving iron speaker does not need to be equipped with a magnet, thereby reducing the space occupied by the moving iron speaker. The movement of the moving part in the first direction drives the deformation of the connecting part and the support part to vibrate the diaphragm in the second direction, so that the vibration area can be adjusted according to the range of motion of the moving part, which improves the versatility of the moving iron speaker and can be used for various headphones. The sound production by driving the diaphragm to vibrate with the moving rod achieves magnet-free operation, small size and low cost.

[0008] According to some embodiments of the present invention, the moving iron horn includes: two first voice coils and two second voice coils, with the two second voice coils disposed between the two first voice coils; the moving rod includes two movable parts and two supporting parts, with the two supporting parts respectively connected to the movable parts and the connecting parts.

[0009] According to some embodiments of the present invention, the moving rod includes two support portions; both ends of the connecting portion are respectively connected to the two support portions, one support portion is connected to the moving portion, and the other support portion is connected to the base plate.

[0010] According to some embodiments of the present invention, the thickness of the support portion is greater than the thickness of the connecting portion; and / or, the thickness of the movable portion is greater than the thickness of the connecting portion.

[0011] According to some embodiments of the present invention, the connecting part has an arc-shaped structure, wherein the top end of the connecting part is connected to the vibrating diaphragm.

[0012] According to some embodiments of this utility model, the movable part is a straight rod type structure.

[0013] According to some embodiments of the present invention, there is an included angle D between the two support portions, and the angle D changes as the movable portion moves.

[0014] According to some embodiments of the present invention, the first voice coil includes a first receiving groove that extends through the first voice coil along a first direction, and a magnetic conductive element is disposed in the first receiving groove, the magnetic conductive element extending along the first direction; the second voice coil includes a second receiving groove that extends through the second voice coil along the first direction, and a magnetic fluid is disposed in the second receiving groove, the movable part is inserted into the second receiving groove, and the magnetic fluid is disposed around the movable part.

[0015] According to some embodiments of the present invention, the magnetic fluid is wrapped around the outer periphery of the movable part; or, the magnetic fluid includes a first magnetic fluid and a second magnetic fluid distributed along a second direction on both sides of the movable part.

[0016] The earphone according to a second aspect of the present invention includes: a balanced armature speaker as described in any of the preceding claims; and a controller for transmitting signals to the balanced armature speaker.

[0017] The headphones according to the embodiments of the present invention have at least the following beneficial effects: the headphones using the above-mentioned moving iron horn drive the diaphragm to vibrate and produce sound by moving the rod, achieving magnet-free operation, small size, low cost, and improved user experience.

[0018] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0020] Figure 1 A schematic diagram of a portion of the internal structure of a moving iron horn provided in an embodiment of this utility model;

[0021] Figure 2 A schematic diagram of the internal structure of a moving iron horn after the diaphragm has been removed, provided as an embodiment of this utility model;

[0022] Figure 3 yes Figure 2 A cross-sectional view of the moving iron horn at point AA;

[0023] Figure 4 The present invention provides a different embodiment from the present invention. Figure 3 A cross-sectional schematic diagram of another type of moving iron horn is shown;

[0024] Figure 5 This is a schematic diagram of the moving rod in the moving iron horn provided in this embodiment of the utility model;

[0025] Figure 6 yes Figure 5A magnified structural diagram of point B in the diagram;

[0026] Figure 7 yes Figure 5 A magnified structural diagram of point C in the diagram;

[0027] Figure 8 This is a schematic diagram of the planar structure of a diaphragm in a moving iron horn provided in this embodiment of the utility model;

[0028] Figure 9 This is a schematic diagram of the planar structure of a diaphragm in a moving iron horn provided in this embodiment of the utility model;

[0029] Figure 10 This is a partial internal structure diagram of another moving iron horn provided in this embodiment of the utility model, showing the connection between the moving rod and the edge of the center of the diaphragm;

[0030] Figure 11 This is a schematic diagram of the internal structure of another moving iron horn provided in this embodiment of the present invention;

[0031] Figure 12 This is a schematic diagram of the magnetic induction of a portion of the structure of a moving iron horn after removing the diaphragm and substrate in a magnetic field, provided by an embodiment of this utility model.

[0032] Figure 13 This utility model provides a partial structure of a moving iron horn after removing the diaphragm and substrate, which differs from another aspect. Figure 12 A schematic diagram of magnetic induction in a magnetic field.

[0033] Reference numerals: substrate 100; recess 101; first voice coil 110; first receiving groove 111; magnetic conductor 112; second voice coil 120; second receiving groove 121; magnetic fluid 122; first magnetic fluid 123; second magnetic fluid 124; diaphragm 130; center portion 131; folded ring portion 132; fixed portion 133; moving rod 140; movable portion 141; support portion 142; connecting portion 143; first direction 150; second direction 160. Detailed Implementation

[0034] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0035] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0036] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0037] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0038] In the description of this utility model, the terms "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0039] See Figure 1 , Figure 2 , Figure 5As shown, a first aspect of this utility model provides a moving iron horn, which includes a substrate 100, a first voice coil 110, a second voice coil 120, a diaphragm 130, and a moving rod 140. The first voice coil 110 and the second voice coil 120 are spaced apart on the substrate 100 along a first direction 150. The diaphragm 130 is spaced apart from the second voice coil 120 along a second direction 160, and the second direction 160 intersects the first direction 150. The movable rod 140 includes a movable part 141, a support part 142, and a connecting part 143. The connecting part 143 is connected to the diaphragm 130. The movable part 141 is movably inserted into the second voice coil 120 along a first direction 150. The support part 142 is connected between the movable part 141 and the connecting part 143. The first voice coil 110 and the second voice coil 120 are used to drive the movable part 141 to move along the first direction 150 under the action of a magnetic field and drive the support part 142 to move, so as to drive the diaphragm 130 to vibrate.

[0040] Please see Figure 12 As shown, the direction of the current through the first voice coil 110 and the second voice coil 120 is controlled to control the magnetic poles on both sides of the first voice coil 110 and the second voice coil 120 in the first direction 150. For example, the side of the first voice coil 110 near the second voice coil 120 can be the south magnetic pole S, and the side of the second voice coil 120 near the first voice coil 110 can be the south magnetic pole S. The movable part 141 is affected by the magnetic field and forms a south magnetic pole S on the side of the movable part 141 near the first voice coil 110. Under the action of the magnetic force, the movable part 141 is driven to move, thereby driving the connecting part 143 to move away from the substrate 100 along the second direction 160, thereby driving the diaphragm 130 to move in the second direction 160.

[0041] Alternatively, please see Figure 13 As shown, by changing the direction of the current flowing in the first voice coil 110 and the second voice coil 120, the magnetic poles on both sides of the first voice coil 110 and the second voice coil 120 in the first direction 150 are changed. The side of the first voice coil 110 closer to the second voice coil 120 can be the south magnetic pole S, and the side of the second voice coil 120 closer to the first voice coil 110 can be the north magnetic pole N. The movable part 141 is affected by the magnetic field and forms the north magnetic pole N on the side of the movable part 141 closer to the first voice coil 110. Under the action of the magnetic force, the movable part 141 is driven to move, thereby driving the connecting part 143 to move along the second direction 160 towards the substrate 100, thereby driving the diaphragm 130 to vibrate in the second direction 160. By setting the first voice coil 110 and the second voice coil 120 instead of the magnet driving the diaphragm 130 to vibrate in the second direction 160, the space occupied by the magnet is reduced, thereby reducing the size of the moving iron speaker.

[0042] In some embodiments, the first direction 150 may intersect the second direction 160 perpendicularly, and the diaphragm 130 may be arranged parallel to the substrate 100 so that the moving rod 140 can drive the diaphragm 130 to vibrate in the second direction for sound generation. Alternatively, the first direction 150 may not intersect the second direction 160 perpendicularly, and the diaphragm 130 may be arranged at an angle relative to the substrate 100, which can be applied to headphones with a special structure.

[0043] When current passes through the first voice coil 110 and the second voice coil 120, a magnetic field is generated, causing different magnetic poles (south magnetic pole S and north magnetic pole N) to be generated on both sides of the first voice coil 110. The movable part 141 of the moving rod 140 generates different magnetic poles (south magnetic pole S and north magnetic pole N) on both sides of the moving rod 140 in the second voice coil 120 through magnetic drive. When the movable part 141 moves in the first direction 150, it causes the support part 142 to move, which in turn drives the connecting part 143 to move. The diaphragm 130 vibrates in the second direction 160 to produce sound. In some smaller headphones, the vibrating area of ​​the diaphragm 130 is small. This can be addressed by reducing the range of motion of the movable part 141, thereby reducing the vibration amplitude of the diaphragm 130 driven by the connecting part 143. In some larger headphones, the vibrating area of ​​the diaphragm 130 is large. This can be addressed by increasing the range of motion of the movable part 141, thereby increasing the vibration amplitude of the diaphragm 130 driven by the connecting part 143. This allows the moving iron speaker to be suitable for various types of headphones. By using the moving rod 140 to drive the diaphragm 130 to vibrate and produce sound, magnet-free operation is achieved, resulting in a small size and low cost.

[0044] In some embodiments, a recessed groove 101 extending along a first direction 150 may be provided on the substrate 100, and the first voice coil 110 and the second voice coil 120 may be disposed in the recessed groove 101 to improve the stability of the first voice coil 110, the second voice coil 120 and the moving rod 140 assembled on the substrate 100.

[0045] In some embodiments, the movable part 141 can be a straight rod type structure to facilitate movement of the movable part 141 within the second voice coil 120. Alternatively, the movable part 141 can also be a curved rod type structure to increase the force-bearing area of ​​the movable part 141 when it moves within the second voice coil 120, thereby reducing the pressure received by the movable part 141 and thus improving its service life.

[0046] In one specific embodiment, the moving iron horn includes two first voice coils 110 and two second voice coils 120, with the two second voice coils 120 disposed between the two first voice coils 110. The moving rod 140 includes two movable parts 141 and two support parts 142. The two ends of the connecting part 143 are respectively connected to one support part 142. Each movable part 141 passes through one of the second voice coils 120, and the two support parts 142 are respectively connected to one movable part 141. When current passes through the two first voice coils 110 and the two second voice coils 120, induced magnetic fields are formed. By setting the two first voice coils 110 and the two second voice coils 120, the two movable parts 141 are moved, stabilizing the connecting part 143 on the central axis of the two movable parts, causing the diaphragm 130 to vibrate, thus reducing damage to the diaphragm 130 during vibration.

[0047] The first voice coil 110 may include a first receiving groove 111 extending through the first voice coil 110 along a first direction 150. A magnetic conductor 112 is disposed in the first receiving groove 111. The magnetic conductor 112 extends along the first direction 150, so that when the first voice coil 110 is energized, the two ends of the magnetic conductor 112 form different magnetic poles (south magnetic pole S and north magnetic pole N) in the induced magnetic field. The second voice coil 120 includes a second receiving groove 121 extending through the second voice coil 120 along the first direction 150. A magnetic fluid 122 is disposed in the second receiving groove 121. A movable part 141 is inserted into the second receiving groove 121. The magnetic fluid 122 is disposed around the movable part 141. The two ends of the movable part 141 form different magnetic poles (south magnetic pole S and north magnetic pole N) in the magnetic field, so that the movable part 141 moves towards or away from the magnetic conductor 112 under the action of magnetism. The movable part 141 is supported in the second receiving groove 121 by magnetic fluid 122, so that the movable part 141 moves along the first direction 150 when it moves.

[0048] When the movable part 141 and the magnetic conductor 112 repel each other under the influence of magnetism, the two movable parts 141 move closer to each other along the first direction 150. The two support parts 142 deform as the movable parts 141 move, causing the included angle D between the two support parts 142 to decrease. The connecting part 143 moves away from the movable part 141 along the second direction 160, thereby pushing the diaphragm 130 to deform. When the movable part 141 and the magnetic conductor 112 attract each other under the influence of magnetism, the two movable parts 141 move further away from each other along the first direction 150. As the movable part 141 moves, the two support parts 142 deform, increasing the included angle D between them. The connecting part 143 moves along the second direction 160 toward the movable part 141, thereby causing the diaphragm 130 to deform. By changing the current, the magnetic field is affected, thus changing the magnetic poles (south magnetic pole S and north magnetic pole N) generated at both ends of the movable part 141. This causes the movable part 141 to reciprocate in the first direction 150, thereby causing the diaphragm 130 to vibrate continuously in the second direction 160 for sound generation.

[0049] Or, see Figure 11As shown, the movable rod 140 includes two support portions 142, and the two ends of the connecting portion 143 are respectively connected to the two support portions 142. One support portion 142 is connected to the movable portion 141, and the other support portion 142 is connected to the substrate 100. A movable portion 141 is disposed within the second receiving cavity of the second voice coil 120. When current passes through the first voice coil 110 and the second voice coil 120, a magnetic field is generated. The first voice coil 110 includes a first receiving groove 111 extending along a first direction 150. A magnetic conductor 112 is disposed within the first receiving groove 111. The magnetic conductor 112 extends along the first direction 150, so that when the first voice coil 110 is energized, the two ends of the magnetic conductor 112 form different magnetic poles (south magnetic pole S and north magnetic pole N) within the induced magnetic field. The second voice coil 120 includes a magnetic conductor 112 extending along the first direction 150. 50 passes through the second receiving groove 121 of the second voice coil 120. Magnetic fluid 122 is disposed in the second receiving groove 121. Movable part 141 is inserted into the second receiving groove 121. Magnetic fluid 122 is disposed around movable part 141. The two ends of movable part 141 form different magnetic poles (south magnetic pole S and north magnetic pole N) in the magnetic field, thereby causing movable part 141 to move toward or away from magnetic conductor 112 in the first direction 150 within the second voice coil 120. There is an included angle D between the two support parts 142. The angle D changes as movable part 141 moves. When the movable part 141 reciprocates, as it moves closer to the magnetic conductor 112, the included angle D between the two support parts 142 increases. This causes the end of the support part 142 used to connect to the connecting part 143 to move the connecting part 143 closer to the substrate 100. The connecting part 143, carrying the diaphragm 130, moves closer to the movable part 141. When the movable part 141 moves away from the magnetic conductor 112, the included angle D between the two support parts 142 decreases. This causes the end of the support part 142 used to connect to the connecting part 143 to move the connecting part 143 away from the substrate 100. The connecting part 143, carrying the diaphragm 130, moves away from the movable part 141. Thus, when the movable part 141 reciprocates under the influence of magnetism, the support part 142 moves or deforms, causing the connecting part 143 to drive the diaphragm 130 to vibrate continuously for sound generation. One of the support parts 142 is connected to the substrate 100, and the other support part 142 is connected to the movable part 141. The movable part 141 moves under the action of magnetism, driving the diaphragm 130 to vibrate. This method is less costly than the solution where the two movable ends move in the two second voice coils 120 respectively.

[0050] Alternatively, one support portion 142 can be connected to the movable portion 141, and another support portion 142 can be rotatably connected to the substrate 100. A movable portion 141 is disposed within the second receiving cavity of the second voice coil 120. When current passes through the first voice coil 110 and the second voice coil 120, a magnetic field is generated. The first voice coil 110 includes a first receiving groove 111 extending along a first direction 150. A magnetic conductive element 112 is disposed within the first receiving groove 111, extending along the first direction 150, such that when the first voice coil 110 is energized, the two ends of the magnetic conductive element 112 form different magnetic poles (south magnetic pole S and north magnetic pole N) within the induced magnetic field. The second voice coil 120 includes a second receiving groove 121 extending through the second voice coil 120 along a first direction 150. A magnetic fluid 122 is disposed within the second receiving groove 121. A movable part 141 is inserted into the second receiving groove 121. The magnetic fluid 122 is disposed around the movable part 141. The two ends of the movable part 141 form different magnetic poles (south magnetic pole S and north magnetic pole N) in a magnetic field. This causes the movable part 141 to move within the second voice coil 120 along the first direction 150 toward or away from the magnetic conductor 112. When the movable part 141 reciprocates, the angle D between the two support parts 142 changes with the movement of the movable part 141. When the movable part 141 moves closer to the magnetic conductor 112, the angle D between the two support parts 142 increases, and the connecting part 143, carrying the diaphragm 130, moves toward the movable part 141. When the movable part 141 moves away from the magnetic conductor 112, the angle D between the two support parts 142 increases. As the included angle D between the support portions 142 decreases, the connecting portion 143 moves the diaphragm 130 away from the movable portion 141. This causes the movable portion 141 to reciprocate under the influence of magnetism, and the support portion 142 deforms, causing the connecting portion 143 to drive the diaphragm 130 to vibrate continuously for sound generation. The support portion 142 is rotatably connected to the substrate 100 through one of the support portions 142. Compared to the support portion 142 being connected to the substrate 100 through one of the support portions 142, the damage to the support portion 142 is less when it deforms.

[0051] For one specific implementation method, please refer to Figure 6 , Figure 7As shown, the thickness H2 of the support portion 142 is greater than the thickness H1 of the connecting portion 143, and / or the thickness H3 of the movable portion 141 is greater than the thickness H1 of the connecting portion 143. The connecting portion 143 is connected to both support portions 142. When the movable portion 141 moves, causing the support portion 142 to deform, the connecting portion 143 deforms under the deformation of the two support portions 142. The relatively smaller thickness H1 of the connecting portion 143 facilitates deformation and reduces damage to the connecting portion 143 itself during deformation. The deformation of the support portion 142 occurs at the connection points between the support portion 142 and the movable portion 141, and between the support portion 142 and the connecting portion 143. The relatively larger thickness H2 of the support portion 142 improves its rigidity, making it less prone to bending. The relatively larger thickness H3 of the movable portion 141 improves its structural strength, thereby increasing the service life of the moving rod 140.

[0052] In one specific implementation, the connecting part 143 has an arc-shaped structure, with its top end connected to the vibrating diaphragm 130. Both ends of the connecting part 143 are connected to two support parts 142 respectively. The arc-shaped structure of the connecting part 143 enhances its elastic deformation capability. When the movable part 141 moves, causing the two connecting parts 143 to deform, the connecting part 143 deforms along with the two support parts 142. When the movable part 141 moves closer to the magnetic conductor 112, the included angle D between the two support parts 142 increases, and both ends of the connecting part 143 deform outwards. When the movable part 141 moves away from the magnetic conductor 112, the included angle D between the two support parts 142 decreases, and both ends of the connecting part 143 deform inwards. By improving the elastic deformation capability of the connecting part 143, its service life is increased. Because the connecting part 143 has an arc-shaped structure, and its top is connected to the diaphragm 130, the damage caused by the connecting part 143 to the diaphragm 130 when it drives the diaphragm 130 to vibrate is reduced, thus improving the service life of the diaphragm 130. Compared with a flat plate structure, the arc-shaped structure of the connecting part 143 is more adaptable to changes in the included angle D and can reduce the damage caused to the connecting part 143 itself when deformation occurs. Compared with a structure with sharp corners, the arc-shaped structure of the connecting part 143 can reduce the contact damage caused by the connecting part 143 to the diaphragm 130 when it drives the diaphragm 130 to vibrate.

[0053] Please see Figure 3 As shown, in one specific embodiment, magnetic fluid 122 is wrapped around the outer periphery of the movable part 141. Magnetic fluid 122 is injected into the second voice coil 120 to support the movable part 141 within the second voice coil 120, so that the movable part 141 can move stably within the second voice coil 120 along the first direction 150.

[0054] Alternatively, please see Figure 4 As shown, the magnetic fluid 122 includes a first magnetic fluid 123 and a second magnetic fluid 124 distributed along the second direction 160 on both sides of the movable part 141. The movable part 141 divides the second cavity into two parts along the second direction 160 within the second voice coil 120, and the first magnetic fluid 123 and the second magnetic fluid 124 are respectively poured into the cavity. The first magnetic fluid 123 and the second magnetic fluid 124 support the movable part 141 on both sides along the second direction 160, so that the movable part 141 moves stably within the second voice coil 120 along the first direction 150.

[0055] Please see Figure 8 , Figure 9 As shown, in one specific embodiment, the diaphragm 130 includes a central portion 131, a folded ring portion 132, and a fixing portion 133. The central portion 131 is used to connect to the moving rod 140. The folded ring portion 132 is located on the outer periphery of the central portion 131, and the fixing portion 133 is located on the outer periphery of the folded ring portion 132. The fixing portion 133 is used to fix the diaphragm 130 on the outer periphery of the diaphragm 130. The connecting portion 143 of the moving rod 140 is connected to the center position of the folded ring portion 132. When the moving portion 141 moves within the second voice coil 120, it deforms the supporting portion 142, thereby driving the connecting portion 143 to move the central portion 131 in the second direction 160, so as to make the diaphragm 130 vibrate. The diaphragm 130 can be configured as a circular diaphragm 130, a strip diaphragm 130, or other structures to suit different headphone structures.

[0056] Alternatively, please see Figure 10 As shown, the connecting part 143 of the moving rod 140 is connected to the center part 131 near the edge. When the moving part 141 moves within the second voice coil 120, it deforms the support part 142, thereby driving the connecting part 143 to move the center part 131 in the second direction 160, so as to make the diaphragm 130 vibrate.

[0057] According to a second aspect embodiment of the present invention, the earphone includes a balanced armature speaker and a controller as described in any of the preceding claims. The controller is used to transmit signals to the balanced armature speaker. The balanced armature speaker moves along a first direction 150 within a second voice coil 120 via a movable part 141 of a moving rod 140, driving a connecting part 143 of the moving rod 140 to vibrate a diaphragm 130 in a second direction 160. This design is applicable to various types of earphones and has strong versatility. Earphones using the above-mentioned balanced armature speaker produce sound by vibrating the diaphragm 130 via the moving rod 140, achieving magnet-free operation, small size, low cost, and improved user experience. The earphones include Bluetooth earphones, running earphones, bone conduction earphones, clip-on Bluetooth earphones, over-ear earphones, smart earphones, etc.

[0058] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention. Furthermore, the embodiments of the present invention and the features thereof can be combined with each other unless otherwise specified.

Claims

1. A moving iron horn, characterized in that, include: substrate(100); The first voice coil (110) and the second voice coil (120) are disposed at intervals on the substrate (100) along the first direction (150); A diaphragm (130) is spaced apart from the second voice coil (120) along a second direction (160), and the second direction (160) intersects the first direction (150); The moving rod (140) includes a movable part (141), a support part (142) and a connecting part (143). The connecting part (143) is connected to the diaphragm (130). The movable part (141) is movably inserted into the second voice coil (120) along a first direction (150). The support part (142) is connected between the movable part (141) and the connecting part (143). The first voice coil (110) and the second voice coil (120) are used to drive the movable part (141) to move along the first direction (150) under the action of the magnetic field and drive the support part (142) to move, so as to drive the diaphragm (130) to vibrate.

2. The moving iron horn according to claim 1, characterized in that, The moving iron horn includes: Two first voice coils (110) and two second voice coils (120), the two second voice coils (120) being disposed between the two first voice coils (110); The moving rod (140) includes two movable parts (141) and two support parts (142). The two ends of the connecting part (143) are respectively connected to one of the support parts (142). Each movable part (141) is respectively inserted through a second voice coil (120). The two support parts (142) are respectively connected to one movable part (141).

3. The moving iron horn according to claim 1, characterized in that, The moving rod (140) includes two of the support portions (142). The two ends of the connecting part (143) are respectively connected to a support part (142), one of the support parts (142) is connected to the movable part (141), and the other support part (142) is connected to the substrate (100).

4. The moving iron horn according to claim 2, characterized in that, The thickness of the support portion (142) is greater than the thickness of the connecting portion (143); and / or, The thickness of the movable part (141) is greater than the thickness of the connecting part (143).

5. The moving iron horn according to claim 2, characterized in that, The connecting part (143) has an arc-shaped structure, wherein the top end of the connecting part (143) is connected to the vibrating diaphragm (130).

6. The moving iron horn according to claim 1, characterized in that, The movable part (141) is a straight rod type structure.

7. The moving iron horn according to claim 2, characterized in that, There is an included angle D between the two support parts (142), and the angle of the included angle D changes as the movable part (141) moves.

8. The moving iron horn according to claim 1, characterized in that, The first voice coil (110) includes a first receiving groove (111) that extends through the first voice coil (110) along a first direction (150), and a magnetic conductor (112) is disposed in the first receiving groove (111), the magnetic conductor (112) extending along the first direction (150); The second voice coil (120) includes a second receiving groove (121) that extends through the second voice coil (120) along a first direction (150). A magnetic fluid (122) is disposed in the second receiving groove (121). The movable part (141) is inserted into the second receiving groove (121), and the magnetic fluid (122) is disposed around the movable part (141).

9. The moving iron horn according to claim 8, characterized in that, The magnetic fluid (122) wraps around the outer periphery of the movable part (141); or, The magnetic fluid (122) includes a first magnetic fluid (123) and a second magnetic fluid (124) distributed along the second direction (160) on both sides of the active part (141).

10. Headphones, characterized in that, include: The moving iron horn as described in any of the preceding claims; A controller is used to transmit signals to the moving iron horn.

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