A square multi-magnetic circuit flat speaker

Abstract

The utility model discloses a square multi-magnetic circuit planar speaker, including an upper cover and a basin frame buckled with the upper cover, wherein the space where the upper cover and the basin frame are buckled is provided with an upper magnetic circuit and a lower magnetic circuit forming a square structure, wherein the upper magnetic circuit and the lower magnetic circuit both include an outer magnetic ring, a split middle magnetic block and an inner magnetic block, wherein the middle magnetic block is arranged between the outer magnetic ring and the inner magnetic block, wherein the outer magnetic ring and the inner magnetic block are flush in height, and the height of the middle magnetic block is not higher than that of the outer magnetic ring and the inner magnetic block. The utility model sets the magnetic circuit into a square shape, and designs the middle magnetic block into a split long strip structure, wherein the magnetization direction of the middle magnetic block is perpendicular to the outer magnetic ring and the inner magnetic block, thereby avoiding the problems caused by the existing circular magnetization direction, and does not require special magnetization tooling, thereby greatly reducing the magnetization cost.

Description

Technical Field

[0001] The utility model relates to the technical field of loudspeakers, in particular to a square multi-magnetic circuit planar loudspeaker. Background Art

[0002] For traditional planar speakers, the voice coil is a flat structure placed above the inner and outer magnets. Generally, in order to increase the magnetic conductivity of the inner and outer magnets, a central magnet with a horizontal magnetic field direction is added in the middle (such as Figure 1 However, for circular or square ring magnets, it is normally impossible to magnetize in the horizontal direction, and it is necessary to use a method of radiating magnetization from the center to the outside (such as Figure 2 ), and special magnetizing tooling is required. The cost of the magnet is more than 10 times that of ordinary magnets, which is expensive and increases the production cost of the manufacturer. Utility Model Content

[0003] The utility model aims to provide a square multi-magnetic path planar speaker, which can solve the problems in the prior art by changing the circular magnetizing direction into a parallel and vertical magnetizing direction.

[0004] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0005] A square multi-magnetic circuit planar speaker comprises an upper cover and a basin frame buckled with the upper cover, an upper magnetic circuit and a lower magnetic circuit forming a square structure are arranged in the space where the upper cover and the basin frame are buckled, the upper magnetic circuit and the lower magnetic circuit both comprise an outer magnetic ring, a split middle magnetic block and an inner magnetic block, the middle magnetic block is arranged between the outer magnetic ring and the inner magnetic block, the outer magnetic ring and the inner magnetic block are flush in height, and the height of the middle magnetic block is not higher than that of the outer magnetic ring and the inner magnetic block.

[0006] Furthermore, there are four middle magnetic blocks in the upper magnetic circuit and the lower magnetic circuit, which are distributed on the four sides of the inner magnetic block. One side of the middle magnetic block is in contact with the inner side of the outer magnetic ring, and the other side of the middle magnetic block is in contact with the outer edge of the inner magnetic block.

[0007] Furthermore, the outer magnetic ring is a square ring structure, the single middle magnetic block is a long strip structure, and the inner magnetic block is a square structure that matches the outer magnetic ring and has a sound hole in the middle.

[0008] Furthermore, there is a distance between two adjacent middle magnetic blocks.

[0009] Furthermore, the upper magnetic circuit is fixedly arranged on the upper cover, and the lower magnetic circuit is fixedly arranged in the basin frame.

[0010] Furthermore, it also includes a diaphragm and a voice coil, wherein the voice coil is adhered to the diaphragm, and the outer edge of the voice coil is placed between the upper cover and the basin frame.

[0011] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0012] Compared with the existing circular magnetizing method, the utility model sets the magnetic circuit into a square, and designs the middle magnetic block into a split long strip structure, so as to ensure that the surfaces of the middle magnetic block in contact with the outer magnetic ring and the inner magnetic block are all flat, and the magnetizing direction of the middle magnetic block is perpendicular to the outer magnetic ring and the inner magnetic block, thus avoiding the problems caused by the existing circular magnetizing direction, and does not require special magnetizing tooling, which greatly reduces the magnetizing cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the existing circular magnetic circuit structure;

[0014] Figure 2 for Figure 1 Schematic diagram of magnetization direction;

[0015] Figure 3 It is a top view assembly drawing of the square multi-magnetic circuit flat speaker of the utility model;

[0016] Figure 4 It is a bottom-up assembly diagram of the square multi-magnetic circuit flat speaker of the utility model;

[0017] Figure 5 It is an exploded schematic diagram of the square multi-magnetic circuit flat speaker of the utility model;

[0018] Figure 6 It is a cross-sectional view of the square multi-magnetic circuit flat speaker of the utility model;

[0019] Figure 7 This is a schematic diagram of the structure of the upper and lower double-layer magnetic circuit of the utility model;

[0020] Figure 8 It is a schematic diagram of vertical magnetization of the utility model;

[0021] Fig. 9 It is a schematic diagram of the magnetic direction of the outer magnetic ring, the middle magnetic block and the inner magnetic block of the utility model;

[0022] Fig.10 It is a schematic diagram for comparing the BL values ​​of the traditional magnetic circuit structure and the multi-magnetic circuit structure of the utility model.

[0023] In the figure: 1. upper cover; 2. upper magnetic circuit; 3. diaphragm; 4. voice coil; 5. lower magnetic circuit; 6. outer magnetic ring; 7. middle magnetic block; 8. inner magnetic block; 9. basin frame. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] See also Figure 3-7 This embodiment provides a square multi-magnetic circuit planar speaker, including an upper cover 1 and a basin frame 9 buckled with the upper cover 1, an upper magnetic circuit 2 and a lower magnetic circuit 5 forming a square structure are arranged in the space where the upper cover 1 and the basin frame 9 are buckled, and the upper magnetic circuit 2 and the lower magnetic circuit 5 form a double-layer structure magnetic circuit.

[0026] The upper magnetic circuit 2 and the lower magnetic circuit 5 both include an outer magnetic ring 6, a split middle magnetic block 7 and an inner magnetic block 8. The middle magnetic block 7 is arranged between the outer magnetic ring 6 and the inner magnetic block 8. The upper magnetic circuit 2 and the lower magnetic circuit 5 all have 8 middle magnetic blocks 7. The upper magnetic circuit 2 and the lower magnetic circuit 5 both have 4 middle magnetic blocks 7, which are distributed on the four sides of the inner magnetic block 8. One side of the middle magnetic block 7 is in contact with the inner side of the outer magnetic ring 6, and the other side of the middle magnetic block 7 is in contact with the outer edge of the inner magnetic block 8. The magnetic direction of the outer magnetic ring 6 and the inner magnetic block 8 is in the up and down direction (such as Fig. 9 ), the magnetism of the outer magnetic ring 6 and the inner magnetic block 8 is opposite, and the magnetic direction of the middle magnetic block 7 is horizontal (such as Figure 8 ), there is a spacing between two adjacent middle magnetic blocks 7, and this spacing is located at the corner of the outer magnetic ring 6 and the inner magnetic block 8. The outer magnetic ring 6 is a square ring structure, and the single middle magnetic block 7 is a long strip structure. The inner magnetic block 8 is a square structure adapted to the outer magnetic ring 6 and has a sound outlet in the middle. Since the four sides of the outer magnetic ring 6 and the inner magnetic block 8 are all planes and parallel to the long strip middle magnetic block 7, the magnetization direction is perpendicular to the outer magnetic ring 6 and the inner magnetic block 8, which avoids the existing circular magnetization direction (such as Figure 2 ) requires special magnetizing tooling and increases production costs.

[0027] The upper magnetic circuit 2 is fixedly arranged on the upper cover 1 , and the lower magnetic circuit 5 is fixedly arranged in the basin frame 9 .

[0028] The square multi-magnetic circuit planar speaker also includes a diaphragm 3 and a voice coil 4. The voice coil 4 is pasted on the diaphragm 3. The outer edge of the voice coil 4 is placed between the upper cover 1 and the basin frame 9. The voice coil 4 is located between the upper magnetic circuit 2 and the lower magnetic circuit 5. There is a gap between the voice coil 4 and the upper magnetic circuit 2 above and the lower magnetic circuit 5 below. Since the voice coil 4 is in the middle of the two magnetic circuits, there is a double-sided magnetic field. The middle magnetic block 7 guides the unused magnetic field of the magnetic circuit through the horizontal magnetic field. The voice coil 4 is vibrated by the internal and external magnetic fields, so that the magnetic field on the side of the voice coil 4 facing the upper magnetic circuit 2 or the lower magnetic circuit 5 is strengthened, so that the sensitivity of the speaker will also be improved.

[0029] Since the magnetism of the middle magnetic block 7 needs to be horizontal, if it is made into a ring structure (such as Figure 1 and Figure 2 ), it is necessary to radiate magnetization from the inside to the outside, so the cost of the magnet will be more than 10 times the current one. Therefore, the middle magnetic block 7 is designed as a long strip structure, which can meet the requirements of the conventional magnetization direction. It is only necessary to place it in the horizontal direction during assembly, so that the cost of the magnet is lower. The height of the outer magnetic ring 6 and the inner magnetic block 8 is flush, and the height of the middle magnetic block 7 is not higher than that of the outer magnetic ring 6 and the inner magnetic block 8.

[0030] like Fig.10 As shown, this is a comparison of the BL values ​​of the traditional magnetic circuit structure and the square multi-magnetic circuit structure of the utility model. Fig.10 It can be seen that curve 1 is the square multi-magnetic circuit structure of the utility model, and curve 2 is the traditional magnetic circuit structure. The BL value of the square multi-magnetic circuit structure is more than 50% greater.

[0031] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0032] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A square multi-magnetic circuit planar speaker, comprising an upper cover (1) and a basin frame (9) buckled with the upper cover (1), characterized in that: An upper magnetic circuit (2) and a lower magnetic circuit (5) forming a square structure are arranged in the space where the upper cover (1) and the basin frame (9) are buckled together. The upper magnetic circuit (2) and the lower magnetic circuit (5) both include an outer magnetic ring (6), a split middle magnetic block (7) and an inner magnetic block (8). The middle magnetic block (7) is arranged between the outer magnetic ring (6) and the inner magnetic block (8). The outer magnetic ring (6) and the inner magnetic block (8) are flush with each other in height. The height of the middle magnetic block (7) is not higher than that of the outer magnetic ring (6) and the inner magnetic block (8).

2. The square multi-magnetic circuit planar speaker according to claim 1, characterized in that: The middle magnetic blocks (7) in the upper magnetic circuit (2) and the lower magnetic circuit (5) each have four blocks, which are distributed on the four sides of the inner magnetic block (8). One side of the middle magnetic block (7) is in contact with the inner side of the outer magnetic ring (6), and the other side of the middle magnetic block (7) is in contact with the outer edge of the inner magnetic block (8).

3. The square multi-magnetic circuit planar speaker according to claim 1, characterized in that: The outer magnetic ring (6) is a square ring structure, the single middle magnetic block (7) is a long strip structure, and the inner magnetic block (8) is a square structure that matches the outer magnetic ring (6) and has a sound outlet hole in the middle.

4. The square multi-magnetic circuit planar speaker according to claim 3, characterized in that: There is a distance between two adjacent middle magnetic blocks (7).

5. The square multi-magnetic circuit planar speaker according to claim 1, characterized in that: The upper magnetic circuit (2) is fixedly arranged on the upper cover (1), and the lower magnetic circuit (5) is fixedly arranged in the basin frame (9).

6. The square multi-magnetic circuit planar speaker according to claim 1, characterized in that: It also includes a diaphragm (3) and a voice coil (4), wherein the voice coil (4) is adhered to the diaphragm (3), and the outer edge of the voice coil (4) is placed between the upper cover (1) and the basin frame (9).

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