Dual voice coil speaker and bone conduction earphone

Abstract

The utility model discloses a kind of double voice coil loudspeaker and bone conduction earphone, comprising: shell;First voice coil and second voice coil, first voice coil and second voice coil are set on shell, the winding axis of first voice coil and the winding axis of second voice coil are collinear or parallel arrangement, the winding direction of the wire of first voice coil and the winding direction of the wire of second voice coil are opposite;Vibration structure, vibration structure is set on shell;Solid magnetic structure, solid magnetic structure is set on vibration structure, the two ends of solid magnetic structure are provided with the first magnetic end and the second magnetic end of different magnetic pole;First voice coil ring is set to the first magnetic end outer periphery, and second voice coil ring is set to the second magnetic end outer periphery.Using the above scheme, provide a kind to be by first voice coil and the magnetic field cooperation of first magnetic end outer periphery, the magnetic field cooperation of second voice coil and second magnetic end outer periphery realizes the double voice coil loudspeaker and bone conduction earphone of improvement vibration intensity.

Description

Technical Field

[0001] This utility model belongs to the field of loudspeakers, specifically relating to a dual voice coil loudspeaker and bone conduction headphones. Background Technology

[0002] Bone conduction loudspeakers work by inputting varying audio signals into the voice coil, causing the voice coil to generate electromagnetic force under the influence of a magnet's magnetic field, thus making the loudspeaker vibrate. The vibrating loudspeaker acts directly on the skull (temporal bone), and the vibration is transmitted through the bone to the cochlea (inner ear), where it is ultimately perceived by the auditory nerve.

[0003] Existing bone conduction loudspeakers can be referenced Figure 1 As shown, it typically includes a housing 91, a diaphragm 92, a magnet 93, and a voice coil 94. The voice coil is mounted on the housing, and the magnet is mounted on the diaphragm. The diaphragm and housing are connected. The voice coil is usually arranged around the outer periphery of the magnet, and to generate an effective electromagnetic force to drive the diaphragm to vibrate up and down, it is usually only arranged around one end of the magnet. Therefore, only a small portion of the magnetic field generated by the magnet interacts with the voice coil, resulting in a relatively weak vibration intensity. Utility Model Content

[0004] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a dual voice coil speaker and bone conduction headphones that improve vibration intensity by cooperating with the magnetic field around the first voice coil and the outer periphery of the first magnetic end, and cooperating with the magnetic field around the second voice coil and the outer periphery of the second magnetic end.

[0005] To achieve the above objectives, this utility model provides the following technical solution: comprising: a housing; a first voice coil and a second voice coil, the first and second voice coils being disposed on the housing, the winding axes of the first and second voice coils being collinear or parallel, and the winding direction of the conductor of the first and second voice coils being opposite; a vibration structure, the vibration structure being disposed on the housing; a solid magnetic structure, the solid magnetic structure being disposed on the vibration structure, the two ends of the solid magnetic structure being provided with a first magnetic end and a second magnetic end with different magnetic poles; the first voice coil being disposed around the outer periphery of the first magnetic end, and the second voice coil being disposed around the outer periphery of the second magnetic end.

[0006] The present invention is further configured such that: the vibration structure includes a first vibration plate and a second vibration plate, the first vibration plate and the second vibration plate are located at both ends of the solid magnetic structure, and the first vibration plate and the second vibration plate are respectively fixedly connected to the solid magnetic structure.

[0007] The present invention is further configured such that: an assembly cavity is provided inside the outer shell, and the two ends of the assembly cavity are open so that the outer shell has a cylindrical structure; the first voice coil, the second voice coil and the solid magnet structure are located inside the assembly cavity; the first vibrating plate and the second vibrating plate are respectively disposed at different openings of the assembly cavity.

[0008] The present invention is further configured such that: the vibration structure includes a third vibration plate, the third vibration plate is located at one end of the solid magnetic structure, and the third vibration plate and the solid magnetic structure are fixedly connected, and the other end of the solid magnetic structure is suspended.

[0009] The present invention is further configured such that: an assembly cavity is provided inside the outer shell, and at least one end of the assembly cavity is open; the first voice coil, the second voice coil, and the solid magnet structure are located inside the assembly cavity; and the third vibrating plate is disposed at one opening of the assembly cavity.

[0010] The present invention is further configured such that: the vibration structure includes a fixed part, a connecting part, and a vibration part; the fixed part is fixedly connected to the outer shell; the solid magnetic structure is fixedly connected to the vibration part; the connecting part fixes the fixed part and the vibration part; and when the vibration part vibrates relative to the fixed part, the connecting part deforms to adapt to the vibration; the fixed part is arranged in a ring shape; the fixed part is provided with multiple assembly slots along the circumferential direction; and multiple assembly inserts are respectively provided at both ends of the outer shell; each assembly insert and the corresponding assembly slot cooperate to limit the circumferential movement of the fixed part.

[0011] The present invention is further configured such that: the assembly insert is provided with an inner positioning surface, the inner positioning surface and the inner peripheral wall of the assembly cavity are coplanar; and / or, the outer peripheral wall of the fixing part and the outer peripheral wall of the outer shell are coplanar, or, the outer peripheral wall of the fixing part is located on the inner periphery of the outer peripheral wall of the outer shell; and / or, the number of the connecting parts is multiple, each connecting part is circumferentially spaced, and each connecting part extends circumferentially from the side connected to the fixing part to the side connected to the vibration part.

[0012] The present invention is further configured such that: the solid magnetic structure includes a magnet, and the first magnetic end and the second magnetic end are the two ends of the magnet; or, the solid magnetic structure includes a magnet and a magnetic conductive element disposed at one end of the magnet, the first magnetic end is disposed on the magnet, and the second magnetic end is disposed on the magnetic conductive element; or, the solid magnetic structure includes a magnet and magnetic conductive elements disposed at both ends of the magnet, and the first magnetic end and the second magnetic end are disposed on different magnetic conductive elements.

[0013] The present invention is further configured such that: the first voice coil and the second voice coil are connected in series, and the audio signal passes through the first voice coil and the second voice coil in different clockwise directions; or, the first voice coil and the second voice coil are connected in parallel, and the audio signal passes through the first voice coil and the second voice coil in different clockwise directions.

[0014] The present invention is further configured to include a flexible circuit board, which is attached to the outer peripheral wall of the housing, and the first voice coil and the second voice coil are electrically connected to the flexible circuit board respectively; and / or, the housing is provided with an assembly cavity, the first voice coil and the second voice coil are disposed in the assembly cavity, the two ends of the assembly cavity are open, and the housing is provided with a wire-passing notch at at least one opening of the assembly cavity, through which the wires of the first voice coil and the second voice coil pass.

[0015] A bone conduction headphone, characterized in that it includes the aforementioned dual voice coil speaker.

[0016] By adopting the above technical solution, the same audio signal can be passed to the first voice coil and the second voice coil. Since the winding directions of the first and second voice coils are opposite, the current direction of the audio signal passing through the first voice coil and the current direction of the audio signal passing through the second voice coil are set in opposite directions. That is, the current direction of one voice coil is set clockwise and the current direction of the other voice coil is set counterclockwise. Furthermore, since the first voice coil is located around the outer periphery of the first magnetic end and the second voice coil is located around the outer periphery of the second magnetic end, the vertical electromagnetic force components generated by the first voice coil and the solid magnetic structure are in the same direction as the vertical electromagnetic force components generated by the second voice coil and the solid magnetic structure, thereby improving the vibration intensity. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model 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 this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the structure of an existing loudspeaker;

[0019] Figure 2 This is an assembly drawing of Embodiment 1 of the present utility model;

[0020] Figure 3 This is a cross-sectional view of Embodiment 1 of the present utility model;

[0021] Figure 4 This is an exploded view of Embodiment 1 of this utility model;

[0022] Figure 5 This is an assembly drawing of Embodiment 2 of the present invention;

[0023] Figure 6 This is a cross-sectional view of Embodiment 2 of the present invention;

[0024] Figure 7 This is an assembly drawing of Embodiment 3 of the present utility model;

[0025] Figure 8 This is a cross-sectional view of Embodiment 3 of the present invention;

[0026] Figure 9 This is an exploded view of Embodiment 3 of this utility model;

[0027] Figure 10 This is an assembly drawing of Embodiment 4 of the present utility model;

[0028] Figure 11 This is a cross-sectional view of Embodiment 4 of the present invention.

[0029] Explanation of reference numerals in the attached figures:

[0030] 1. Outer shell;

[0031] 11. Assemble the inner cavity; 12. Assemble the insertion part; 13. Threading notch;

[0032] 121. Inner positioning surface;

[0033] 2. First voice coil;

[0034] 3. Second voice coil;

[0035] 4. Vibrating structure;

[0036] 41. First vibrating plate; 42. Second vibrating plate; 43. Third vibrating plate; 44. Fixing part; 45. Connecting part; 46. Vibrating part;

[0037] 441. Assemble the slot;

[0038] 5. Solid magnetic structure;

[0039] 51. First magnetic end; 52. Second magnetic end; 53. Magnet; 54. Magnetic conductor;

[0040] 61. Flexible circuit board; 62. Connecting circuit board. Detailed Implementation

[0041] To enable those skilled in the art to better understand this utility model and to more clearly define the scope of protection claimed by this utility model, the present utility model is described in detail below with reference to certain specific embodiments. It should be noted that the following are only some specific embodiments of the present utility model, and the specific and direct descriptions of related structures are merely for the convenience of understanding the present utility model; the specific features do not necessarily or directly limit the scope of implementation of the present utility model. Conventional choices and substitutions made by those skilled in the art under the guidance of the present utility model should all be considered within the scope of protection claimed by this utility model.

[0042] Example 1:

[0043] like Figures 2-4 As shown, this utility model discloses a dual voice coil loudspeaker, comprising:

[0044] The outer shell 1 has an outer peripheral wall that is cylindrical with the axial direction upward. The outer shell 1 is provided with an assembly cavity 11 that extends through the outer shell 1 from top to bottom. The inner peripheral wall of the assembly cavity 11 is cylindrical, so that the outer shell 1 is cylindrical in shape as a whole.

[0045] The first voice coil 2 and the second voice coil 3 are disposed on the inner peripheral wall of the assembly cavity 11 and fixed to the outer shell 1 by means such as adhesive bonding. The winding axis of the first voice coil 2 and the winding axis of the second voice coil 3 are collinear. It should be noted that the winding axis of the voice coil is formed by winding the voice coil in a helical direction to form a columnar structure, and the center line of the columnar structure is the winding axis of the voice coil. The winding direction of the wire of the first voice coil 2 is opposite to that of the wire of the second voice coil 3. It should be noted that the winding direction of the voice coil is when viewed from the winding axis of the voice coil, and the voice coil is wound clockwise or counterclockwise.

[0046] Vibration structure 4 is mounted on the outer shell 1 and can vibrate in the up and down direction.

[0047] The solid magnetic structure 5 is located inside the assembly cavity 11, and the solid magnetic structure 5 and the vibration structure 4 are fixedly arranged so that the solid magnetic structure 5 and the vibration structure 4 vibrate up and down synchronously. The upper and lower ends of the solid magnetic structure 5 are provided with a first magnetic end 51 and a second magnetic end 52 with different magnetic poles. The first magnetic end 51 can be the N pole and the second magnetic end 52 can be the S pole.

[0048] The first voice coil 2 is located around the outer periphery of the first magnetic end 51, and the second voice coil 3 is located around the outer periphery of the second magnetic end 52.

[0049] Therefore, by passing the same audio signal to the first voice coil 2 and the second voice coil 3, and since the winding directions of the first voice coil 2 and the second voice coil 3 are opposite, the current direction of the audio signal passing through the first voice coil 2 and the current direction of the audio signal passing through the second voice coil 3 are set in opposite directions. That is, the current direction of one voice coil is set clockwise and the current direction of the other voice coil is set counterclockwise. Furthermore, since the first voice coil 2 is arranged around the outer periphery of the first magnetic end 51 and the second voice coil 3 is arranged around the outer periphery of the second magnetic end 52, the vertical electromagnetic force component generated by the first voice coil 2 and the solid magnetic structure 5 is in the same direction as the vertical electromagnetic force component generated by the second voice coil 3 and the solid magnetic structure 5, thereby improving the vibration intensity.

[0050] In other embodiments, the first voice coil 2 and the second voice coil 3 are also appropriately offset horizontally so that the winding axis of the first voice coil 2 and the winding axis of the second voice coil 3 are set in parallel.

[0051] Specifically, the vibration structure 4 includes a first vibrating plate 41 and a second vibrating plate 42. The first vibrating plate 41 is fixedly disposed at the upper end of the outer shell 1 to partially cover the upper opening of the assembly cavity 11. The second vibrating plate 42 is fixedly disposed at the lower end of the outer shell 1 to partially cover the lower opening of the assembly cavity 11. The first vibrating plate 41 and the upper end of the solid magnetic structure 5, as well as the second vibrating plate 42 and the lower end of the solid magnetic structure 5, are respectively fixedly connected by connecting blocks so that the first vibrating plate 41, the second vibrating plate 42 and the solid magnetic structure 5 vibrate up and down synchronously.

[0052] In this embodiment, both the first vibrating plate 41 and the second vibrating plate 42 include a fixing part 44, a connecting part 45, and a vibrating part 46. The fixing part 44 is fixedly connected to the outer shell 1, and the solid magnetic structure 5 is fixedly connected to the vibrating part 46. The connecting part 45 fixes the fixing part 44 and the vibrating part 46 together. When the vibrating part 46 vibrates relative to the fixing part 44, the connecting part 45 deforms to adapt to the vibration. Specifically, the fixing part 44 is arranged in a ring shape and has multiple mounting slots 441 arranged circumferentially. Multiple mounting inserts 12 are respectively protruding from both ends of the outer shell 1. Each mounting insert 12 and the corresponding mounting slot 441 cooperate to limit the circumferential positioning of the fixing part 44. In this embodiment, two arc-shaped mounting slots 441 and mounting inserts 12 are used to achieve the fixed connection between the fixing part 44 and the outer shell 1 with an interference fit.

[0053] Preferably, the assembly insert 12 is provided with an inner positioning surface 121, and the inner positioning surface 121 and the inner peripheral wall of the assembly cavity 11 are coplanar, so as to make processing and demolding more convenient.

[0054] Preferably, the outer peripheral wall of the fixing part 44 and the outer peripheral wall of the outer shell 1 are coplanar to make the overall outer periphery of the speaker flatter. In this embodiment, the outer peripheral wall of the fixing part 44 is located on the inner periphery of the outer peripheral wall of the outer shell 1.

[0055] Preferably, there are multiple connecting parts 45. In this embodiment, three connecting parts 45 are used. Each connecting part 45 is arranged at circumferential intervals. Each connecting part 45 extends circumferentially from one side of the connecting fixing part 44 to the side of the connecting vibrating part 46, so that the circumferentially extended connecting parts 45 can achieve a larger amplitude of the vibrating part 46 by appropriate torsion when the vibrating part 46 vibrates up and down.

[0056] The solid magnetic structure 5 in this embodiment includes a magnet 53 and magnetic conductive elements 54 disposed at the upper and lower ends of the magnet 53. The first magnetic end 51 and the second magnetic end 52 are disposed on different magnetic conductive elements 54.

[0057] In other embodiments, the solid magnetic structure 5 includes a magnet 53, with a first magnetic end 51 and a second magnetic end 52 being the two ends of the magnet 53.

[0058] In other embodiments, the solid magnetic structure 5 includes a magnet 53 and a magnetic conductor 54 disposed at either the upper or lower end of the magnet 53, with a first magnetic end 51 disposed on the magnet 53 and a second magnetic end 52 disposed on the magnetic conductor 54.

[0059] The first voice coil 2 and the second voice coil 3 can be connected in series, and each of the first voice coil 2 and the second voice coil 3 extends a conductor to connect to an external circuit to input an audio signal. The audio signal passes through the first voice coil 2 and the second voice coil 3 in sequence, and passes through the first voice coil 2 and the second voice coil 3 in different clockwise directions.

[0060] In this process, a continuous wire can be wound in one direction (clockwise or counterclockwise) to form a first voice coil 2. After the first voice coil 2 is wound, it can be wound in the other direction (clockwise or counterclockwise) to form a second voice coil 3, so as to realize the series connection of the first voice coil 2 and the second voice coil 3.

[0061] Alternatively, the first voice coil 2 and the second voice coil 3 can be formed by winding different wires in different clockwise and counterclockwise directions, and then the first voice coil 2 and the second voice coil 3 can be connected in series by spot welding.

[0062] The first voice coil 2 and the second voice coil 3 can each extend two wires. The two wires of the first voice coil 2 are connected to the two wires of the second voice coil 3 respectively, so as to form a parallel configuration of the first voice coil 2 and the second voice coil 3. The two combined wires formed by the connection are connected to the external circuit to input audio signals through the circuit. The audio signals pass through the first voice coil 2 and the second voice coil 3 synchronously, and pass through the first voice coil 2 and the second voice coil 3 in different clockwise directions.

[0063] Example 2:

[0064] like Figures 5-6As shown, a dual voice coil loudspeaker has the same main structure as Embodiment 1, except that it also includes a flexible circuit board 61. The flexible circuit board 61 is disposed on the outer periphery of the housing 1 and is attached to the outer peripheral wall of the housing 1 by means of adhesive or other methods. Two conductive wires extending from the first voice coil 2 and the second voice coil 3 are respectively soldered to the flexible circuit board 61 to achieve series or parallel connection of the first voice coil 2 and the second voice coil 3. Furthermore, the positive and negative terminals of the flexible circuit board 61 are connected to external circuitry. The flexible circuit board 61 allows the first voice coil 2 and the second voice coil 3 to be connected to the circuit first, and subsequent assembly of the loudspeaker only requires connecting the positive and negative terminals of the flexible circuit board 61 externally, making subsequent assembly more convenient. The flexibility of the flexible circuit board 61 allows it to effectively adapt to the curved outer periphery of the housing 1, resulting in a smaller overall loudspeaker size.

[0065] In addition, the two ends of the housing 1 are respectively provided with wire notches 13. At least one wire of the first voice coil 2 passes through the wire notch 13 at one end of the housing 1, and at least one wire of the second voice coil 3 passes through the wire notch 13 at the other end of the housing 1, so that the wires pass through the wire notches 13 without being compressed and thus preventing the wires from being broken.

[0066] Specifically, two wire-passing notches 13 are provided at both ends of the outer casing 1 so that the two conductors of the first voice coil 2 and the two conductors of the second voice coil 3 can pass through different wire-passing notches 13.

[0067] Example 3:

[0068] like Figures 7-9 As shown, a dual voice coil loudspeaker has the same main structure as in Embodiment 1 or Embodiment 2, except that the vibration structure 4 includes a third vibrating plate 43. The third vibrating plate 43 is fixedly disposed on the upper end of the outer shell 1 to partially cover the upper opening of the assembly cavity 11, and the third vibrating plate 43 and the upper end of the solid magnetic structure 5 are fixedly connected by a connecting block so that the third vibrating plate 43 and the solid magnetic structure 5 vibrate up and down synchronously.

[0069] In this embodiment, the third vibrating plate 43 has the same structure as the first vibrating plate 41 and the second vibrating plate 42 in the first embodiment. This will not be repeated here.

[0070] In this embodiment, only the third vibrating plate 43 is connected to the upper side of the solid magnetic structure 5. Therefore, during the vibration process, the vibration of the third vibrating plate 43 is only subjected to a single force, making the conversion of audio signals into vibration signals more accurate. In the first embodiment, two vibrating plates are used. When the first vibrating plate 41 and the second vibrating plate 42 vibrate upwards, the solid magnetic structure 5 pushes the first vibrating plate 41 upwards and pulls the second vibrating plate 42 upwards. The two are subjected to different forces, which can easily lead to vibration deviation and inaccurate pitch. This makes production and correction more difficult.

[0071] Example 4:

[0072] like Figures 10-11 As shown, a dual voice coil loudspeaker has the same main structure as Embodiment 3, except that it also includes a connecting circuit board 62. The connecting circuit board 62 is fixedly disposed at the lower end of the housing 1, and the first voice coil 2 and the second voice coil 3 are directly electrically connected to the connecting circuit board 62, and are connected to the external circuit through the positive and negative terminals of the connecting circuit board 62.

[0073] The connecting circuit board 62 is arranged in a ring shape so that the vertical vibration of the solid magnetic structure 5 does not interfere with the connecting circuit board 62.

[0074] In addition, the two ends of the housing 1 are respectively provided with wire notches 13. At least one wire of the first voice coil 2 passes through the wire notch 13 at one end of the housing 1, and at least one wire of the second voice coil 3 passes through the wire notch 13 at the other end of the housing 1, so that the wires pass through the wire notches 13 without being compressed and thus preventing the wires from being broken.

[0075] Specifically, two wire-passing notches 13 are provided at both ends of the outer casing 1 so that the two conductors of the first voice coil 2 and the two conductors of the second voice coil 3 can pass through different wire-passing notches 13.

[0076] Example 5:

[0077] This utility model discloses a bone conduction headphone, including a dual voice coil speaker according to any one of Embodiments 1 to 4.

[0078] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A dual voice coil loudspeaker, characterized in that, include: Outer shell (1); The first voice coil (2) and the second voice coil (3) are disposed on the outer shell (1). The winding axis of the first voice coil (2) and the winding axis of the second voice coil (3) are collinear or parallel. The winding direction of the wire of the first voice coil (2) is opposite to the winding direction of the wire of the second voice coil (3). Vibration structure (4), the vibration structure (4) is disposed on the outer shell (1); A solid magnetic structure (5) is disposed on a vibration structure (4), and the two ends of the solid magnetic structure (5) are provided with a first magnetic end (51) and a second magnetic end (52) with different magnetic poles; The first voice coil (2) is arranged around the outer periphery of the first magnetic end (51), and the second voice coil (3) is arranged around the outer periphery of the second magnetic end (52).

2. The dual voice coil loudspeaker according to claim 1, characterized in that: The vibration structure (4) includes a first vibration plate (41) and a second vibration plate (42). The first vibration plate (41) and the second vibration plate (42) are located at both ends of the solid magnetic structure (5), and the first vibration plate (41) and the second vibration plate (42) are fixedly connected to the solid magnetic structure (5) respectively.

3. The dual voice coil loudspeaker according to claim 2, characterized in that: The outer shell (1) is provided with an assembly cavity (11), and the two ends of the assembly cavity (11) are open so that the outer shell (1) has a cylindrical structure; The first voice coil (2), the second voice coil (3), and the solid magnet structure (5) are located inside the assembly cavity (11); The first vibrating plate (41) and the second vibrating plate (42) are respectively disposed at different openings of the assembly cavity (11).

4. The dual voice coil loudspeaker according to claim 1, characterized in that: The vibration structure (4) includes a third vibrating plate (43), which is located at one end of the solid magnetic structure (5) and is fixedly connected to the solid magnetic structure (5). The other end of the solid magnetic structure (5) is suspended.

5. The dual voice coil loudspeaker according to claim 4, characterized in that: The outer shell (1) is provided with an assembly cavity (11), and at least one end of the assembly cavity (11) is open; The first voice coil (2), the second voice coil (3), and the solid magnet structure (5) are located inside the assembly cavity (11); The third vibrating plate (43) is disposed at an opening in the assembly cavity (11).

6. The dual voice coil loudspeaker according to any one of claims 1-5, characterized in that: The vibration structure (4) includes a fixed part (44), a connecting part (45) and a vibration part (46). The fixed part (44) is fixedly connected to the outer shell (1), the solid magnetic structure (5) is fixedly connected to the vibration part (46), the connecting part (45) fixes the fixed part (44) and the vibration part (46) together, and when the vibration part (46) vibrates relative to the fixed part (44), the connecting part (45) deforms to adapt to the vibration. The fixing part (44) is arranged in a ring shape, and the fixing part (44) is provided with a plurality of assembly slots (441) along the circumferential direction. The two ends of the outer shell (1) are respectively provided with a plurality of assembly inserts (12), and each assembly insert (12) and the corresponding assembly slot (441) cooperate to limit the fixing part (44) in the circumferential direction.

7. The dual voice coil loudspeaker according to claim 6, characterized in that: The assembly insert (12) is provided with an inner positioning surface (121), and the inner positioning surface (121) and the inner peripheral wall of the assembly cavity (11) are coplanar; and / or, The outer peripheral wall of the fixing part (44) and the outer peripheral wall of the outer shell (1) are coplanar, or the outer peripheral wall of the fixing part (44) is located on the inner periphery of the outer peripheral wall of the outer shell (1); and / or, The number of connecting parts (45) is multiple, and each connecting part (45) is arranged at circumferential intervals. Each connecting part (45) extends circumferentially from one side of the connecting fixing part (44) to one side of the connecting vibration part (46).

8. The dual voice coil loudspeaker according to claim 1, characterized in that: The solid magnetic structure (5) includes a magnet (53), wherein the first magnetic end (51) and the second magnetic end (52) are the two ends of the magnet (53); or, The solid magnetic structure (5) includes a magnet (53) and a magnetic conductor (54) disposed at one end of the magnet (53), wherein the first magnetic end (51) is disposed on the magnet (53) and the second magnetic end (52) is disposed on the magnetic conductor (54); or, The solid magnetic structure (5) includes a magnet (53) and magnetic conductors (54) disposed at both ends of the magnet (53), wherein the first magnetic end (51) and the second magnetic end (52) are disposed on different magnetic conductors (54).

9. The dual voice coil loudspeaker according to claim 1, characterized in that: The first voice coil (2) and the second voice coil (3) are connected in series, and the audio signal passes through the first voice coil (2) and the second voice coil (3) in different clockwise directions; or, the first voice coil (2) and the second voice coil (3) are connected in parallel, and the audio signal passes through the first voice coil (2) and the second voice coil (3) in different clockwise directions.

10. The dual voice coil loudspeaker according to claim 1, characterized in that: It also includes a flexible circuit board (61) that is attached to the outer peripheral wall of the housing (1), and the first voice coil (2) and the second voice coil (3) are electrically connected to the flexible circuit board (61); and / or, The outer shell (1) is provided with an assembly cavity (11), the first voice coil (2) and the second voice coil (3) are disposed in the assembly cavity (11), the two ends of the assembly cavity (11) are open, and the outer shell (1) is provided with a wire notch (13) at at least one opening of the assembly cavity (11), through which the wires of the first voice coil (2) and the second voice coil (3) pass out.

11. A bone conduction headphone, characterized in that: Includes the dual voice coil loudspeaker as described in any one of claims 1-10.

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