Loudspeaker with double fixed magnetic structure and bone conduction earphone

Abstract

The utility model discloses a kind of loudspeaker and bone conduction earphone with double magnetic structure, comprising: shell;Voice coil structure, the voice coil structure and shell are fixedly set;First vibration structure, the first vibration structure is set on shell;First magnetic structure, the first magnetic structure is set on first vibration structure;Second magnetic structure, the second magnetic structure is located at one end of first magnetic structure, and the magnetic pole of the end of first magnetic structure towards second magnetic structure and the magnetic pole of the end of second magnetic structure towards first magnetic structure are same between first magnetic structure and second magnetic structure.Using the above scheme, provide a kind of loudspeaker and bone conduction earphone with double magnetic structure by the combination of voice coil structure, first magnetic structure and second magnetic structure to improve vibration intensity.

Description

Technical Field

[0001] This utility model belongs to the field of loudspeakers, specifically relating to a loudspeaker with a dual solid magnet structure 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 typically include a housing, a diaphragm, a magnet, and a voice coil. The voice coil is fixed on the housing, and the magnet is mounted on the diaphragm. The diaphragm is connected to the housing. By transmitting an audio signal to the voice coil, the voice coil and the magnet interact to cause the diaphragm to vibrate.

[0004] Because existing bone conduction loudspeakers use only one magnet and one voice coil to vibrate, the vibration intensity is relatively small. Utility Model Content

[0005] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a loudspeaker and bone conduction headphones with a dual-magnetic structure that improves vibration intensity by combining a voice coil structure, a first solid magnet structure and a second solid magnet structure.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A loudspeaker with a dual-magnetic structure, characterized in that it comprises: a housing; a voice coil structure, wherein the voice coil structure and the housing are fixedly disposed; a first vibrating structure, wherein the first vibrating structure is disposed on the housing; a first magnetic structure, wherein the first magnetic structure is disposed on the first vibrating structure; and a second magnetic structure, wherein the second magnetic structure is located at one end of the first magnetic structure, and a levitation space is provided between the first magnetic structure and the second magnetic structure, wherein the magnetic poles of the end of the second magnetic structure facing the first magnetic structure are the same as the magnetic poles of the end of the first magnetic structure facing the second magnetic structure.

[0008] The present invention is further configured such that the second solid magnetic structure is fixedly positioned relative to the outer shell.

[0009] The present invention is further configured to include a PCB, which is fixedly mounted on the housing, and the voice coil structure and the second solid magnet structure are fixedly mounted on the PCB, wherein the voice coil structure and the PCB are electrically connected.

[0010] The present invention is further configured such that: an assembly cavity is provided through the outer shell, and a first assembly opening and a second assembly opening are formed at both ends of the assembly cavity; the first vibration structure is disposed at the first assembly opening; the PCB is disposed at the second assembly opening; and the first solid magnet structure, the second solid magnet structure and the voice coil structure are disposed in the assembly cavity.

[0011] The present invention is further configured to include a second vibration structure, wherein the second vibration structure is disposed on the outer shell, and the second solid magnetic structure is disposed on the second vibration structure.

[0012] The present invention is further configured such that the voice coil structure is arranged in a ring shape, and the opposite ends of the first and second solid magnet structures are both inserted into the inner circumference of the voice coil structure.

[0013] The present invention is further configured such that: the first vibration structure and the first solid magnetic structure are combined to form a first vibration body, and the second vibration structure and the second solid magnetic structure are combined to form a second vibration body, wherein the first vibration body and the second vibration body are arranged in a mirror image relative to the voice coil structure.

[0014] The present invention is further configured such that: an assembly cavity is provided through the outer shell, and a first assembly opening and a second assembly opening are formed at both ends of the assembly cavity; the first vibration structure is disposed at the first assembly opening, the second vibration structure is disposed at the second assembly opening, and the first solid magnet structure, the second solid magnet structure and the voice coil structure are disposed in the assembly cavity.

[0015] The present invention is further configured such that: the first vibration structure is a vibrating plate; and / or, the first and / or second magnetic structures are provided with magnetic bowls and / or magnetic conductive sheets and / or connecting blocks.

[0016] A bone conduction headphone, characterized in that it includes the above-mentioned speaker with a dual solid magnet structure.

[0017] By adopting the above technical solution, 1. In the non-working state, i.e., when the voice coil structure does not transmit audio signals, the second solid magnetic structure can generate a repulsive force on the first solid magnetic structure, so that the first solid magnetic structure is in a static equilibrium state under the combined action of the force of the first vibrating structure and other structures, its own weight, and the repulsive force of the second solid magnetic structure; 2. In the working state, i.e., when the voice coil structure transmits audio signals, the variable magnetic field generated by the voice coil structure is superimposed on the constant magnetic field generated by the second solid magnetic structure, which acts on the constant magnetic field generated by the first solid magnetic structure to realize that the first solid magnetic structure vibrates with the first vibrating structure, and due to the gap magnetic lines of force between the first and second solid magnetic structures, The magnetic field of the gap is weak but has a large gradient. Small changes in the magnetic field of the voice coil structure can cause large changes in the repulsive force, thus significantly driving the vibration of the first vibrating structure, and the vibration intensity of the first vibrating structure is significantly enhanced. 3. The setting of the levitation space ensures that the first and second solid magnetic structures are set in a non-contact manner, that is, it ensures that the vibration of the first vibrating structure will not be affected by the collision of the first and second solid magnetic structures, ensuring the effectiveness of the output. Moreover, since the first and second solid magnetic structures are set with the same pole on the opposite side, when the first solid magnetic structure moves closer to the second solid magnetic structure due to vibration, the repulsive force between the two increases significantly to prevent the first and second solid magnetic structures from colliding. Attached Figure Description

[0018] 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.

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

[0020] Figure 2 This is an exploded view of Embodiment 1 of this utility model;

[0021] Figure 3 This is a cross-sectional view of Embodiment 1 of the present utility model;

[0022] Figure 4 This is a schematic diagram of the first vibration structure in Embodiment 1 of this utility model;

[0023] Figure 5 for Figure 2 Enlarged view of A in the middle;

[0024] Figure 6 This is an assembly drawing of Embodiment 2 of the present invention;

[0025] Figure 7This is an exploded view of Embodiment 2 of this utility model;

[0026] Figure 8 This is a cross-sectional view of Embodiment 2 of the present invention.

[0027] Explanation of reference numerals in the attached figures:

[0028] 1. Outer shell;

[0029] 11. Assembly cavity; 12. Assembly insert;

[0030] 111. First assembly opening; 112. Second assembly opening; 121. Inner positioning surface;

[0031] 2. Voice coil structure;

[0032] 31. First vibration structure; 32. Second vibration structure;

[0033] 41. First solid-magnetic structure; 42. Second solid-magnetic structure;

[0034] 5. Suspended space;

[0035] 6. PCB;

[0036] 71. Magnetic bowl; 72. Magnetic conductive sheet; 73. Connecting block;

[0037] 81. Fixing part; 82. Connecting part; 83. Vibrating part;

[0038] 811. Assembly slot. Detailed Implementation

[0039] 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.

[0040] Example 1:

[0041] like Figures 1-5 As shown, this utility model discloses a loudspeaker with a dual solid magnet structure, comprising:

[0042] The outer casing 1 has an outer peripheral wall that is cylindrical with the axial direction upward. The outer casing 1 has an assembly cavity 11 inside. The assembly cavity 11 is provided to penetrate the outer casing 1 vertically to form a first assembly opening 111 at the top and a second assembly opening 112 at the bottom. The inner peripheral wall of the assembly cavity 11 is cylindrical so that the outer casing 1 is cylindrical in shape as a whole.

[0043] The voice coil structure 2 is made of a spirally wound wire. The voice coil structure 2 is located on the inner periphery of the assembly cavity 11, and the voice coil structure 2 and the outer shell 1 are fixedly arranged.

[0044] The first vibration structure 31 is a vibrating plate and is located at the first assembly opening 111.

[0045] The first magnetic structure 41 is made of a magnet and is disposed on the lower side of the first vibration structure 31. The first magnetic structure 41 and the first vibration structure 31 are fixedly disposed.

[0046] The second magnetic structure 42 is made of magnets and is located at the lower end of the first magnetic structure 41. The second magnetic structure 42 and the outer shell 1 are fixedly arranged. A levitation space 5 is provided between the first magnetic structure 41 and the second magnetic structure 42. The magnetic poles at the upper end of the second magnetic structure 42 and the magnetic poles at the lower end of the first magnetic structure 41 are arranged in the same way, such as N pole or S pole.

[0047] Therefore, 1. In the non-operating state, i.e., when the voice coil structure 2 does not transmit audio signals, the second solid magnetic structure 42 can generate an upward repulsive force on the first solid magnetic structure 41, so that the first solid magnetic structure 41 is in a static equilibrium state under the combined action of the force of the first vibrating structure 31 and other structures, its own weight, and the repulsive force of the second solid magnetic structure 42; 2. In the operating state, i.e., when the voice coil structure 2 transmits audio signals, the variable magnetic field generated by the voice coil structure 2 is superimposed on the constant magnetic field generated by the second solid magnetic structure 42, which acts on the constant magnetic field generated by the first solid magnetic structure 41 to realize the vibration of the first solid magnetic structure 41 with the first vibrating structure 31. And because the gap magnetic field lines of the first solid magnetic structure 41 and the second solid magnetic structure 42 diverge, the gap magnetic field... The field is weak but the gradient is large. Small changes in the magnetic field of the voice coil structure 2 can cause large changes in the repulsive force, thereby significantly driving the vibration of the first vibration structure 31, and the vibration intensity of the first vibration structure 31 is significantly enhanced. 3. The suspension space 5 is set so that the first solid magnetic structure 41 and the second solid magnetic structure 42 are set in a non-contact manner, that is, to ensure that the vibration of the first vibration structure 31 is not affected by the collision of the first solid magnetic structure 41 and the second solid magnetic structure 42, thus ensuring the effectiveness of the output. Since the first solid magnetic structure 41 and the second solid magnetic structure 42 are set with the same pole on the opposite side, that is, when the first solid magnetic structure 41 moves closer to the second solid magnetic structure 42 due to vibration, the repulsive force between the two increases significantly to prevent the first solid magnetic structure 41 and the second solid magnetic structure 42 from colliding.

[0048] In addition, it also includes PCB6, which is fixedly mounted on the housing 1 and located at the second assembly opening 112. The voice coil structure 2 and the second solid magnet structure 42 are respectively fixedly mounted on the upper side of PCB6 to achieve relative fixation of the housing 1, PCB6, voice coil structure 2 and the second solid magnet structure 42. The voice coil structure 2 and PCB6 are electrically connected so that only external circuits need to be connected to PCB6 in the future.

[0049] Specifically, the assembly cavity 11 has a step at the second assembly opening 112. The PCB6 is inserted into the assembly cavity 11 from the second assembly opening 112 and positioned by the step. The fixing method can be interference fit, snap fastener, glue bonding, etc.

[0050] Preferably, the voice coil structure 2 is arranged in a ring shape, and the second solid magnet structure 42 is disposed on the inner circumference of the voice coil structure 2, so as to make the overall structure more compact locally.

[0051] Additionally, it should be noted that the placement of the first vibration structure 31 and PCB6 at both ends of the housing 1 allows the first solid magnet structure 41, the second solid magnet structure 42, and the voice coil structure 2 to be housed within the assembly cavity 11, thus preventing interference with vibration and ensuring the effectiveness of the output.

[0052] In addition, a magnetic bowl 71 is provided on the upper end of the first solid magnetic structure 41 to cover the first solid magnetic structure 41, so that the magnetic field path is constrained by the magnetic bowl 71 and the magnetic flux density of the magnetic gap is increased to achieve the function of magnetic conduction.

[0053] The magnetic bowl 71 and the first magnetic structure 41 can be connected by adhesive bonding.

[0054] In addition, a connecting block 73 is provided between the first vibration structure 31 and the magnetic bowl 71. The outer periphery of the connecting block 73 is smaller than the outer periphery of the magnetic bowl 71 and the outer periphery of the first vibration structure 31, so that the magnetic bowl 71 and the first vibration structure 31 are separated by the connecting block 73, thereby ensuring that the magnetic bowl 71 does not easily interfere with the deformation of the first vibration structure 31 when vibrating with the first solid magnetic structure 41, thus ensuring the effectiveness of the vibration.

[0055] In this embodiment, the first vibration structure 31 includes a fixing part 81, a connecting part 82, and a vibration part 83. The fixing part 81 is fixedly connected to the outer shell 1, the solid magnetic structure is fixedly connected to the vibration part 83, and the connecting part 82 fixes the fixing part 81 and the vibration part 83. When the vibration part 83 vibrates relative to the fixing part 81, the connecting part 82 deforms to adapt to the vibration. Specifically, the fixing part 81 is arranged in a ring shape, and the fixing part 81 is provided with a plurality of assembly slots 811 along the circumference. The outer shell 1 is provided with a plurality of assembly inserts 12 protruding from the first assembly opening 111. Each assembly insert 12 and the corresponding assembly slot 811 cooperate to limit the circumferential positioning of the fixing part 81. In this embodiment, two arc-shaped assembly slots 811 and assembly inserts 12 are used to achieve the fixed connection between the fixing part 81 and the outer shell 1 with an interference fit.

[0056] 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.

[0057] Preferably, the outer peripheral wall of the fixing part 81 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 81 is located on the inner periphery of the outer peripheral wall of the outer shell 1.

[0058] Preferably, there are multiple connecting parts 82. In this embodiment, three connecting parts 82 are used. Each connecting part 82 is arranged circumferentially. Each connecting part 82 extends circumferentially from one side of the connecting fixing part 81 to the side of the connecting vibrating part 83, so that the circumferentially extended connecting parts 82 can achieve a larger amplitude of the vibrating part 83 by appropriate torsion when the vibrating part 83 vibrates up and down.

[0059] Example 2:

[0060] like Figures 6-8As shown, this utility model discloses a loudspeaker with a dual solid magnet structure, comprising:

[0061] The outer casing 1 has an outer peripheral wall that is cylindrical with the axial direction upward. The outer casing 1 has an assembly cavity 11 inside. The assembly cavity 11 is provided to penetrate the outer casing 1 vertically to form a first assembly opening 111 at the top and a second assembly opening 112 at the bottom. The inner peripheral wall of the assembly cavity 11 is cylindrical so that the outer casing 1 is cylindrical in shape as a whole.

[0062] The voice coil structure 2 is made of a spirally wound wire. The voice coil structure 2 is located on the inner periphery of the assembly cavity 11, and the outer periphery of the voice coil structure 2 and the inner periphery wall of the assembly cavity 11 are fixed and bonded together by glue.

[0063] The first vibration structure 31 is a vibrating plate and is located at the first assembly opening 111.

[0064] The second vibration structure 32 is a vibrating plate and is located at the second assembly opening 112.

[0065] The first magnetic structure 41 is made of a magnet and is disposed on the lower side of the first vibration structure 31. The first magnetic structure 41 and the first vibration structure 31 are fixedly disposed.

[0066] The second magnetic structure 42 is made of a magnet. The second magnetic structure 42 is disposed on the upper side of the second vibration structure 32, and the second magnetic structure 42 and the second vibration structure 32 are fixedly disposed.

[0067] A levitation space 5 is provided between the first solid magnetic structure 41 and the second solid magnetic structure 42. The magnetic poles at the upward end of the second solid magnetic structure 42 and the magnetic poles at the downward end of the first solid magnetic structure 41 are arranged in the same way, such as N pole or S pole.

[0068] Therefore, 1. In the working state, that is, when the voice coil structure 2 transmits an audio signal, the variable magnetic field generated by the voice coil structure 2 acts on the first solid magnetic structure 41 and the second solid magnetic structure 42 respectively, causing the first vibration structure 31 and the second vibration structure 32 to vibrate. Since the magnetic poles at the opposite ends of the first solid magnetic structure 41 and the second solid magnetic structure 42 are the same, that is, the driving direction of the force exerted by the voice coil structure 2 on the first solid magnetic structure 41 and the driving direction of the force exerted on the second solid magnetic structure 42 are the same, so that the first vibration structure 31 and the second vibration structure 32 vibrating in the same direction are maximized. The vibration intensity is enhanced; 2. The suspension space 5 is set so that the first solid magnetic structure 41 and the second solid magnetic structure 42 are set in a non-contact manner, that is, to ensure that the vibration of the first vibration structure 31 is not affected by the collision of the first solid magnetic structure 41 and the second solid magnetic structure 42, thus ensuring the effectiveness of the output. Since the first solid magnetic structure 41 and the second solid magnetic structure 42 are set in the same pole on the opposite side, when the first solid magnetic structure 41 moves closer to the second solid magnetic structure 42 due to vibration, the repulsive force between the two is greatly increased to prevent the first solid magnetic structure 41 and the second solid magnetic structure 42 from colliding.

[0069] Specifically, the voice coil structure 2 is arranged in a ring shape, and the opposite ends of the first magnetized structure 41 and the second magnetized structure 42 are partially inserted into the inner circumference of the voice coil structure 2, making the overall structure more compact.

[0070] Preferably, the first vibrating structure 31 and the first solid magnetic structure 41 are combined to form a first vibrating body, and the second vibrating structure 32 and the second solid magnetic structure 42 are combined to form a second vibrating body. The first vibrating body and the second vibrating body are arranged in a mirror image relative to the voice coil structure 2.

[0071] Therefore, 1. Static magnetic self-balancing: Opposite magnetic poles of the same polarity generate symmetrical repulsive forces on the vibration system, resulting in zero net force and zero static offset. 2. Thrust multiplication and efficient drive: Symmetrical drive with dual magnetic circuits improves power capacity and sensitivity. 3. Leakage magnetic self-shielding: The reversed magnetic fields of the external magnetic poles cancel each other out in the far field, reducing electromagnetic interference. 4. Optimized vibration transmission: Symmetrical coupling of the skull with dual transmission plates forms a force couple, resulting in high transmission efficiency and uniform distribution.

[0072] In addition, it should be noted that, due to the arrangement of the first vibration structure 31 and the second vibration structure 32 at both ends of the outer shell 1, the first solid magnet structure 41, the second solid magnet structure 42, and the voice coil structure 2 are all built into the assembly cavity 11, so that the vibration is not easily interfered with and the effectiveness of the output is guaranteed.

[0073] In addition, magnetic conductive sheets 72 are provided at the upper end of the first magnetic solid structure 41 and the lower end of the second magnetic solid structure 42, so that a low magnetic resistance magnetic circuit is formed under the action of the magnetic conductive sheets 72, guiding and constraining the magnetic lines of force and increasing the magnetic flux density of the magnetic gap.

[0074] The magnetic conductive sheet 72 and the first magnetic solid structure 41 or the second magnetic solid structure 42 can be connected by adhesive bonding.

[0075] In addition, a connecting block 73 is provided between the first vibration structure 31 and the magnetic bowl 71.

[0076] In this embodiment, the specific structures of the first vibration structure 31 and the second vibration structure 32 are the same as those of the first vibration structure 31 in Embodiment 1. In this embodiment, the first assembly opening 111 and the second assembly opening 112 are provided with the assembly insert 12 as described in Embodiment 1 for the first vibration structure 31 and the second vibration structure 32 to be assembled.

[0077] Example 3:

[0078] A bone conduction headphone, including the speaker described in Embodiment 1 or Embodiment 2.

[0079] 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 loudspeaker with a double fixed magnetic structure, characterized in that, include: Outer shell (1); The voice coil structure (2) and the outer shell (1) are fixedly arranged; The first vibration structure (31) is disposed on the outer shell (1); A first solid magnetic structure (41) is disposed on a first vibration structure (31); The second solid magnetic structure (42) is located at one end of the first solid magnetic structure (41), and a levitation space (5) is provided between the first solid magnetic structure (41) and the second solid magnetic structure (42). The magnetic poles of the end of the second solid magnetic structure (42) facing the first solid magnetic structure (41) are the same as the magnetic poles of the end of the first solid magnetic structure (41) facing the second solid magnetic structure (42).

2. The loudspeaker with a dual solid magnet structure according to claim 1, characterized in that: The second solid magnetic structure (42) is fixed relative to the outer shell (1).

3. The loudspeaker with a dual solid magnet structure according to claim 2, characterized in that: It also includes a PCB (6), which is fixedly disposed on the housing (1), and the voice coil structure (2) and the second solid magnet structure (42) are fixedly disposed on the PCB (6), and the voice coil structure (2) and the PCB (6) are electrically connected.

4. The loudspeaker with a dual solid magnet structure according to claim 3, characterized in that: An assembly cavity (11) is provided through the outer shell (1), and a first assembly opening (111) and a second assembly opening (112) are formed at both ends of the assembly cavity (11). The first vibration structure (31) is disposed at the first assembly opening (111), the PCB (6) is disposed at the second assembly opening (112), and the first solid magnet structure (41), the second solid magnet structure (42) and the voice coil structure (2) are disposed in the assembly cavity (11).

5. The loudspeaker with a dual solid magnet structure according to claim 1, characterized in that: It also includes a second vibration structure (32), which is disposed on the outer shell (1), and the second solid magnetic structure (42) is disposed on the second vibration structure (32).

6. The loudspeaker with a dual solid magnet structure according to claim 5, characterized in that: The voice coil structure (2) is arranged in a ring shape, and the opposite ends of the first solid magnet structure (41) and the second solid magnet structure (42) are both inserted into the inner circumference of the voice coil structure (2).

7. The loudspeaker with a dual solid magnet structure according to claim 6, characterized in that: The first vibration structure (31) and the first solid magnetic structure (41) are combined to form a first vibrating body, and the second vibration structure (32) and the second solid magnetic structure (42) are combined to form a second vibrating body. The first vibrating body and the second vibrating body are arranged in a mirror image relative to the voice coil structure (2).

8. The loudspeaker with a dual solid magnet structure according to claim 5, characterized in that: An assembly cavity (11) is provided through the outer shell (1), and a first assembly opening (111) and a second assembly opening (112) are formed at both ends of the assembly cavity (11). The first vibration structure (31) is disposed at the first assembly opening (111), the second vibration structure (32) is disposed at the second assembly opening (112), and the first solid magnet structure (41), the second solid magnet structure (42) and the voice coil structure (2) are disposed in the assembly cavity (11).

9. The loudspeaker with a dual solid magnet structure according to claim 1, characterized in that: The first vibrating structure (31) employs a vibrating plate; and / or, The first magnetic structure (41) and / or the second magnetic structure (42) are provided with a magnetic bowl (71) and / or a magnetic conductive sheet (72) and / or a connecting block (73).

10. A bone conduction headphone, characterized in that: The loudspeaker with a dual solid magnet structure as described in any one of claims 1-9.

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