Loudspeaker with novel magnetic circuit design

Abstract

The utility model discloses a loudspeaker with a novel magnetic circuit design, which comprises a loudspeaker body, the loudspeaker body is arranged in an up-and-down penetrating manner, the upper surface of the loudspeaker body is provided with a vibrating diaphragm, and the middle part of the upper surface of the vibrating diaphragm is provided with a dome; a plurality of voice coils are arranged on the lower surface of the vibrating diaphragm in parallel, the voice coils are symmetrically distributed with the symmetric plane of the vibrating diaphragm as the center and are arranged at equal intervals, the central axes of the voice coils are horizontally arranged, and a plurality of magnets are arranged on the lower portion of an inner cavity of the loudspeaker body. The magnets are distributed among the plurality of voice coils and on one side of the edge voice coil, and the horizontally arranged central axis of the voice coil is favorable for optimizing the linearity of the loudspeaker, so that the change of a BL value in the whole voice coil displacement range is smoother, and nonlinear distortion is reduced; the magnets are distributed between the voice coils and on one side of the edge voice coil, so that the design of a magnetic field can be optimized, the uniformity of the magnetic field can be improved, the smoothness of a BL value can be improved, distortion can be reduced, and dynamic response can be optimized.

Description

Technical Field

[0001] The utility model belongs to the technical field of loudspeakers, and in particular relates to a loudspeaker with a novel magnetic circuit design. Background Art

[0002] The BL value of a loudspeaker is the product of the magnetic field strength B of the coil magnetic gap and the length L of the voice coil wire, which reflects the electromagnetic conversion efficiency of the loudspeaker. The larger the BL value, the higher the electromagnetic conversion efficiency of the loudspeaker, which can generate a stronger magnetic field to drive the diaphragm to vibrate, thereby having better transient response and higher sensitivity. In loudspeaker design, the smoothness of the BL value (BL linearity) refers to the degree to which the BL value remains constant or changes smoothly throughout the entire voice coil displacement range. The smoothness of the BL value has an important impact on the performance of the loudspeaker, especially in terms of dynamic response, distortion control and overall sound quality. Specifically, the smoothness of the BL value refers to the change of the BL value within the range of the voice coil from the static position to the maximum displacement (i.e., full stroke). Ideally, the BL value should remain constant or fluctuate within the minimum variation range.

[0003] The magnetic circuit formed by the voice coil and magnet of a traditional speaker cannot guarantee the smoothness of the speaker's BL value. The smoothness of the speaker's BL value is largely related to the harmonic distortion level of the speaker unit. During the movement of the voice coil, the flatter the BL value change curve and the smaller the fluctuation, the lower the harmonic distortion of the speaker unit; therefore, the present application provides a speaker with a new magnetic circuit design to ensure that the BL value changes smoothly within a smaller range during the vibration of the voice coil. Utility Model Content

[0004] The utility model provides a loudspeaker with a novel magnetic circuit design, aiming to solve the problems pointed out in the above background technology.

[0005] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0006] A speaker with a novel magnetic circuit design comprises: a speaker body, the speaker body being arranged to penetrate from top to bottom, a diaphragm being arranged on the upper surface of the speaker body, and a dome being arranged in the middle of the upper surface of the diaphragm;

[0007] Several voice coils are arranged parallel to the lower surface of the diaphragm. The voice coils are symmetrically distributed with the symmetry plane of the diaphragm as the center and are arranged at equal intervals. The central axis of the voice coil is arranged horizontally. Several magnets are arranged in the lower part of the inner cavity of the speaker body. The magnets are distributed between the voice coils and on one side of the edge voice coil.

[0008] Furthermore, the length directions of the speaker body, the voice coil and the magnet are all parallel, and the distances between several magnets and adjacent voice coils are the same.

[0009] Further, the speaker body is made of magnetic conductive material.

[0010] Further, the diaphragm comprises: an arc-shaped part arranged in a ring shape, a central connecting part is arranged in the middle of the arc-shaped part, an edge connecting part is arranged at the outer edge of the arc-shaped part, the upper surface of the central connecting part is matched with the spherical top, the lower surface is matched with the voice coil, and the edge connecting part is matched with the speaker body.

[0011] Further, a positioning fillet is arranged at the joint of the arc-shaped part and the central connecting part, and the positioning fillet is arranged on the upper surface of the protruding central connecting part and matched with the side wall of the spherical top.

[0012] Further, the speaker body comprises: a first splicing part and a second splicing part, and the first splicing part and the second splicing part are buckled and connected to form the speaker body.

[0013] Further, a clamping groove for positioning the magnet is arranged on the inner wall of the speaker body.

[0014] Compared with the prior art, the utility model has the following technical effects:

[0015] 1. The speaker with novel magnetic circuit design has the parallel arrangement and the symmetrical distribution of the voice coil, which helps to maintain the uniform magnetic field distribution in the whole voice coil displacement range.

[0016] 2. The speaker with novel magnetic circuit design has the magnetic iron distributed between the voice coils and on one side of the edge voice coil, which can optimize the magnetic field design and improve the uniformity of the magnetic field. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 is the overall schematic view of the speaker with novel magnetic circuit design.

[0018] Figure 2It is the internal structure schematic view of a novel loudspeaker with a novel magnetic circuit design.

[0019] Figure 3 It is the width direction sectional view of the novel loudspeaker with a novel magnetic circuit design.

[0020] Figure 4 It is the diaphragm structure schematic view of the novel loudspeaker with a novel magnetic circuit design.

[0021] Figure 5 It is the length direction sectional view of the novel loudspeaker with a novel magnetic circuit design.

[0022] Figure 6 It is the magnetizing direction schematic view of the novel loudspeaker with a novel magnetic circuit design.

[0023] Figure 7 It is the magnetic circuit schematic view of a traditional loudspeaker.

[0024] Figure 8 It is the magnetic circuit schematic view of the novel loudspeaker with a novel magnetic circuit design.

[0025] Figure 9 It is the BL smoothness comparison schematic view of the novel loudspeaker with a novel magnetic circuit design and a traditional loudspeaker.

[0026] In the drawing:

[0027] 1, loudspeaker body; 101, first splicing part; 102, second splicing part;

[0028] 2, diaphragm; 201, arc-shaped part; 202, central connecting part; 203, edge connecting part; 204, positioning fillet;

[0029] 3, ball top; 4, voice coil; 5, magnet. Specific implementation

[0030] In order to make the purpose, technical scheme and advantages of the utility model more clear, the following will combine the specific embodiment of the present application, and refer to the drawings, and the technical scheme of the utility model is clearly and completely described.

[0031] As Figures 1-3 shown, a novel loudspeaker with a novel magnetic circuit design, comprising: loudspeaker body 1, the loudspeaker body 1 is arranged in and out, the upper surface of the loudspeaker body 1 is provided with diaphragm 2, the upper surface of the diaphragm 2 is provided with ball top 3 in the middle part;

[0032] The lower surface of the diaphragm 2 is provided with a plurality of voice coils 4, which are symmetrically distributed with respect to the symmetry plane of the diaphragm 2 and are equidistantly spaced, and the central axes of the voice coils 4 are horizontally arranged. The inner cavity of the loudspeaker body 1 is provided with a plurality of magnets 5, which are arranged between the plurality of voice coils 4 and on one side of the edge voice coil 4.

[0033] In the conventional loudspeaker, the central axis of the voice coil is vertically arranged, and the magnet is arranged in the middle of the voice coil. The magnetic circuit formed by the above structure has a large difference at different positions. As shown in Figure 7 When the voice coil moves, the BL value changes greatly, which easily leads to the inconsistency of the driving force of the loudspeaker at different voice coil displacement positions, thereby generating nonlinear distortion. This distortion makes the sound unnatural, especially in the large volume and rapidly changing audio frequency band. As shown in Figure 8 The present application helps to maintain uniform magnetic field distribution within the entire voice coil 4 displacement range by symmetrically and equidistantly arranging the plurality of voice coils 4 on the diaphragm 2 and equidistantly arranging the magnets 5 between the voice coils 4. This uniformity can reduce the variation amplitude of the BL value with the displacement of the voice coil 4, thereby improving the smoothness of the BL value. The symmetrically distributed voice coil 4 design can reduce the BL value fluctuation caused by voice coil deviation or inclination. The symmetric design helps to maintain stable electromagnetic driving force at different voice coil displacement positions, thereby maintaining the smoothness of the BL value. The horizontally arranged central axis of the voice coil helps to optimize the linearity of the loudspeaker, so that the BL value changes more smoothly within the entire voice coil displacement range, reducing nonlinear distortion. As shown in Figure 9 The BL value curve of the loudspeaker with the novel magnetic circuit design of the present application is smoother compared with the conventional loudspeaker.

[0034] As shown in Figures 2-4 The length directions of the loudspeaker body 1, the voice coil 4 and the magnet 5 are parallel, and the distances between the plurality of magnets 5 and the adjacent voice coils 4 are the same.

[0035] In a specific embodiment, the loudspeaker body 1 is made of a magnetic conductive material. The loudspeaker body 1 is also made of a magnetic conductive material, which helps to form a uniform magnetic circuit.

[0036] As shown in Figure 4As shown, the diaphragm 2 comprises: an annularly arranged arc-shaped part 201, a central connecting part 202 is arranged in the middle of the arc-shaped part 201, an edge connecting part 203 is arranged at the outer edge of the arc-shaped part 201, the upper surface of the central connecting part 202 is matched with the dome 3, the lower surface is matched with the voice coil 4, and the edge connecting part 203 is matched with the speaker body 1. Through the arrangement of the arc-shaped part 201, the rigidity and lightweight of the diaphragm 2 can be improved, the sound diffusion characteristics can be optimized, the high frequency and low frequency response can be improved, the acoustic efficiency can be improved, and the vibration transmission can be reduced, and the performance and sound quality of the loudspeaker can be significantly improved.

[0037] As shown in the drawings, Figure 4 As shown, the intersection of the arc-shaped part 201 and the central connecting part 202 is provided with a positioning fillet 204, the upper surface of the protruding central connecting part 202 is provided with the positioning fillet 204, and the positioning fillet 204 is matched with the side wall of the dome 3. Through the arrangement of the positioning fillet 204, the material stress concentration can be effectively reduced, especially at the intersection of the arc-shaped part 201 and the central connecting part 202, the service life of the diaphragm 2 can be effectively improved; and the protruding design of the positioning fillet 204 can simplify the assembly process of the diaphragm 2 and the dome 3. The protruding fillet can be used as a positioning reference during assembly, ensuring accurate matching of the diaphragm 2 and the dome 3.

[0038] As shown in the drawings, Figure 2 As shown, the speaker body 1 comprises: a first splicing part 101 and a second splicing part 102, and the first splicing part 101 and the second splicing part 102 are buckled to form the speaker body 1.

[0039] As shown in the drawings, Figures 4-5 As shown, the inner wall of the speaker body 1 is provided with a clamping groove for positioning the magnet 5. Through the arrangement of the clamping groove on the inner wall of the speaker body 1, the accurate position of the magnet 5 on the inner wall of the speaker body 1 can be ensured, and the accurate position of the magnet 5 is crucial for the overall performance of the loudspeaker, especially in the interaction between the magnetic force and the voice coil, and accurate positioning helps to maintain the performance stability of the loudspeaker in long-term use.

[0040] The above is only a preferred embodiment of the present application, and it should be pointed out that for ordinary skilled persons in the art, without departing from the creative concept of the present application, a number of modifications and improvements can be made, which all belong to the protection scope of the present application.

Claims

1. A loudspeaker with a new magnetic circuit design, characterized in that: include: A loudspeaker body (1), the loudspeaker body (1) is arranged to penetrate from top to bottom, a diaphragm (2) is arranged on the upper surface of the loudspeaker body (1), and a dome (3) is arranged in the middle of the upper surface of the diaphragm (2); A plurality of voice coils (4) are arranged in parallel on the lower surface of the diaphragm (2), and the plurality of voice coils (4) are symmetrically distributed with the symmetry plane of the diaphragm (2) as the center and are arranged at equal intervals. The central axis of the voice coil (4) is arranged horizontally. A plurality of magnets (5) are arranged at the lower part of the inner cavity of the speaker body (1), and the magnets (5) are distributed between the plurality of voice coils (4) and on one side of the edge voice coil (4).

2. The loudspeaker with a novel magnetic circuit design according to claim 1, characterized in that: The length directions of the loudspeaker body (1), the voice coil (4) and the magnet (5) are all parallel, and the spacings between a plurality of the magnets (5) and adjacent voice coils (4) are the same.

3. The loudspeaker with a novel magnetic circuit design according to claim 2, characterized in that: The loudspeaker body (1) is made of magnetic conductive material.

4. The loudspeaker with a novel magnetic circuit design according to claim 3, characterized in that: The diaphragm (2) comprises: an annularly arranged arc portion (201); a central connecting portion (202) is provided in the middle of the arc portion (201); an edge connecting portion (203) is provided on the outer edge of the arc portion (201); the upper surface of the central connecting portion (202) cooperates with the dome (3); the lower surface cooperates with the voice coil (4); and the edge connecting portion (203) cooperates with the speaker body (1).

5. The loudspeaker with a novel magnetic circuit design according to claim 4, characterized in that: A positioning fillet (204) is provided at the intersection of the arc portion (201) and the central connecting portion (202), and the positioning fillet (204) is provided on the upper surface of the protruding central connecting portion (202), and the positioning fillet (204) cooperates with the side wall of the spherical top (3).

6. The loudspeaker with a novel magnetic circuit design according to claim 5, characterized in that: The loudspeaker body (1) comprises a first splicing portion (101) and a second splicing portion (102), wherein the first splicing portion (101) and the second splicing portion (102) are snap-connected to form the loudspeaker body (1).

7. The loudspeaker with a novel magnetic circuit design according to claim 6, characterized in that: A slot for positioning the magnet (5) is provided on the inner wall of the speaker body (1).

Images