Double-magnetic-circuit structure of ultrathin woofer

Abstract

The utility model discloses a double magnetic circuit structure of ultrathin woofer, including shell, magnetic member, voice coil, damper and cone, the magnetic member includes first magnet and second magnet, first magnet is provided at one end portion of shell, second magnet is coaxially sleeved with first magnet inner side and is fixedly connected with first magnet, and the cone is provided with the first magnet. One end portion of the voice coil extends between the first magnet and the second magnet. The inner side and the outer side of the voice coil are respectively provided with one magnet, double magnetic circuits can be formed in the same loudspeaker space, compared with a conventional single magnet, the double-magnetic-circuit loudspeaker can generate larger magnetic field intensity when acting with the voice coil under the same condition, larger ampere force is formed to act on the voice coil, the cone is driven to generate larger amplitude, the sound loudness is improved, and the sound quality is improved. And the magnetic field can be relatively more uniform and stable through the washer, so that the fidelity of sound is improved to the greatest extent, and the sound effect quality of the loudspeaker is improved.

Description

Technical Field

[0001] This utility model relates to the field of loudspeaker technology, and in particular to the dual magnetic circuit structure of an ultra-thin woofer. Background Technology

[0002] In speaker design, the size and internal structural layout of the speaker directly affect its sound quality. With the current trend towards miniaturization and thinner designs in electronic products, the space allocated to speakers has been squeezed to the limit, but market demands for sound quality are constantly increasing, forcing manufacturers to continuously improve and optimize the internal structural layout of speakers. Utility Model Content

[0003] To address the problems existing in the prior art, this utility model provides a dual magnetic circuit structure for an ultra-thin woofer. A magnet is set on both the inner and outer sides of the voice coil, forming a dual magnetic circuit within the same speaker space. Compared to the conventional single magnet setting, the interaction with the voice coil under the same conditions can generate a larger magnetic field strength and form a larger Ampere force on the voice coil, driving the paper cone to produce a larger amplitude, improving the sound loudness. Furthermore, the washer can make the magnetic field more uniform and stable, maximizing the sound fidelity and improving the sound quality of the speaker.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0005] The ultra-thin woofer features a dual-magnetic circuit structure. The woofer includes a housing, a magnetic component, a voice coil, a spider, and a cone. The cone is located at one end of the housing, while the magnetic component, voice coil, and spider are all located inside the housing.

[0006] The magnetic component includes a first magnet and a second magnet. The first magnet is matched and installed at one end of the housing. The second magnet is coaxially sleeved inside the first magnet and is detachably fixed to the first magnet through a positioning component.

[0007] One end of the voice coil rests against the paper cone, and the other end extends between the first magnet and the second magnet;

[0008] The two ends of the spider abut against the outer wall of the voice coil and the inner wall of the housing, respectively.

[0009] As a further explanation of the above technical solution:

[0010] In the above technical solution, the housing is a centrally symmetrical box structure with one end larger than the other. The larger end is fitted with the paper cone, and the smaller end forms a countersunk groove. The first magnet is installed on the countersunk groove. The positioning member is provided at the end of the first magnet away from the countersunk groove, and the second magnet is provided on the side wall of the positioning member facing the speaker.

[0011] In the above technical solution, the inner wall of the countersunk hole groove has a stepped structure, and the first magnet is attached to the side wall with a smaller outer contour.

[0012] In the above technical solution, the side wall of the housing is a stepped structure and a first shoulder and a second shoulder are formed on its inner wall. A paper cone support is provided on the first shoulder, and the paper cone is provided on the paper cone support. The paper cone extends toward the outside of the speaker and extends to the outside of the housing. One end of the spring abuts against the second shoulder.

[0013] In the above technical solution, the paper cone support is a thin-walled ring structure, on which an outer positioning part, a buffer part and an inner positioning part are formed radially. The outer positioning part is a planar structure and is fixed to the first shoulder. The buffer part is an arc-shaped structure extending toward the inside of the speaker. The inner positioning part is a planar structure and is detachably fixed to the paper cone.

[0014] In the above technical solution, the paper cone, voice coil, spider, first magnet and second magnet are all coaxially arranged with the housing.

[0015] In the above technical solution, the end of the first magnet near the paper cone can also be detachably fixed with an annular baffle, the outer wall of the annular baffle abutting against the housing, and the end of the second magnet facing the paper cone can also be detachably fixed with a washer, the washer and the annular baffle being coaxially arranged and respectively located on the inner and outer sides of the voice coil.

[0016] Compared with the prior art, the beneficial effects of this utility model are as follows: by setting the magnetic components as two independent first magnets and second magnets and placing them on the outside and inside of the voice coil respectively, a dual magnetic circuit can be formed in the same speaker space. Compared with the conventional single magnet setting, the interaction with the voice coil under the same conditions can generate a larger magnetic field strength, thereby forming a larger Ampere force acting on the voice coil, driving the paper cone to produce a larger amplitude and improving the sound loudness. By setting the positioning component and the annular baffle, the first magnet can be stably fixed on the housing. The washer has the functions of fixing the second magnet and guiding the magnet, making the magnetic field acting on the voice coil more uniform and stable, maximizing the sound fidelity and improving the sound quality of the speaker. Attached Figure Description

[0017] Figure 1 This is a cross-sectional structural diagram of this embodiment;

[0018] Figure 2 This is a cross-sectional view of the shell in this embodiment;

[0019] Figure 3 This is a cross-sectional view of the paper basin support in this embodiment.

[0020] In the diagram: 10. Housing; 11. Countersunk groove; 12. First shoulder; 13. Second shoulder; 20. Magnetic component; 21. First magnet; 22. Second magnet; 30. Voice coil; 40. Spider; 50. Cone; 60. Positioning component; 70. Cone support; 71. Outer positioning part; 72. Buffer part; 73. Inner positioning part; 80. Annular baffle; 90. Washer; 1. Shoulder; 2. Outer positioning part; 3. Buffer part; 4. Inner positioning part. Detailed Implementation

[0021] The present invention will now be described in further detail with reference to the accompanying drawings.

[0022] The embodiments described with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application. In the description of this application, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as limiting this application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "several" or "more than" means two or more, unless otherwise explicitly specified. In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances. In this application, unless otherwise expressly specified and limited, "above" or "below" a second feature can include direct contact between the first and second features, or it can include contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of a second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" of a second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0023] like Figure 1 As shown, the ultra-thin woofer has a dual magnetic circuit structure. The woofer includes a housing 10, a magnetic element 20, a voice coil 30, a spider 40, and a paper cone 50. The paper cone 50 is located at one end of the housing 10, and the magnetic element 20, voice coil 30, and spider 40 are all located inside the housing.

[0024] The magnetic component 20 includes a first magnet 21 and a second magnet 22. The first magnet 21 is matched and installed at one end of the housing 10, and the second magnet 22 is coaxially sleeved inside the first magnet 21 and is detachably fixed to the first magnet 21 through the positioning component 60.

[0025] One end of the voice coil 30 rests against the paper cone 50, and the other end extends between the first magnet 21 and the second magnet 22;

[0026] The two ends of the spider 40 abut against the outer wall of the voice coil 30 and the inner wall of the housing 10, respectively.

[0027] This invention sets the magnetic component 20 as two independent first magnets 21 and second magnets 22 and places them on the outside and inside of the voice coil 30 respectively. This can form a dual magnetic circuit in the same speaker space. Compared with the conventional single magnet setting, the magnetic field strength generated by the interaction with the voice coil 30 under the same conditions can generate a larger Ampere force on the voice coil 30, thereby driving the paper cone 50 to generate a larger amplitude and improve the sound loudness.

[0028] like Figure 1-2 As shown, the housing 10 is a box structure that is centrally symmetrical and larger at one end than at the other. A paper cone 50 is fitted into the larger end, and a countersunk hole groove 11 is formed at the smaller end. A first magnet 21 is installed on the countersunk hole groove 11. A positioning member 60 is set at the end of the first magnet 21 away from the countersunk hole groove 11. A second magnet 22 is provided on the side wall of the positioning member 60 facing the speaker.

[0029] In this embodiment, the inner wall of the countersunk hole groove 11 is a stepped structure, the first magnet 21 is attached to the side wall with a smaller outer contour, the side wall of the housing 10 is a stepped structure and a first shoulder 12 and a second shoulder 13 are formed on its inner wall, a paper cone support 70 is provided on the first shoulder 12, a paper cone 50 is provided on the paper cone support 70, the paper cone 50 extends toward the outside of the speaker and extends to the outside of the housing 10, and one end of the spider 40 abuts against the second shoulder 13.

[0030] like Figure 3 As shown, the paper cone support 70 is a thin-walled ring structure, on which an outer positioning part 71, a buffer part 72 and an inner positioning part 73 are formed radially. The outer positioning part 71 is a planar structure and is fixed to the first shoulder 12. The buffer part 72 is an arc-shaped structure extending toward the inside of the speaker. The inner positioning part 73 is a planar structure and is detachably fixed to the paper cone 50.

[0031] In the above technical solution, the paper cone 50, voice coil 30, spider 40, first magnet 21 and second magnet 22 are all coaxially arranged with the housing 10.

[0032] like Figure 1As shown, the end of the first magnet 21 near the cone 50 is also detachably fixed with an annular baffle 80, the outer wall of the annular baffle 80 abuts against the housing 10, and the end of the second magnet 22 facing the cone 50 is also detachably fixed with a washer 90. The washer 90 and the annular baffle 80 are coaxially arranged and respectively located on the inner and outer sides of the voice coil 30.

[0033] Understandably, the positioning component 60 and the annular baffle 80 work together to stably fix the first magnet 21 onto the housing 10. The washer 90 serves to both fix the second magnet 22 and guide the magnetism, which can make the magnetic field acting on the voice coil 30 relatively uniform and stable, thereby maximizing the fidelity of the sound and improving the sound quality of the speaker.

[0034] The above does not limit the technical scope of this utility model. Any modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of this utility model shall still fall within the technical scope of this utility model.

Claims

1. A dual-magnetic circuit structure for an ultra-thin woofer, the woofer comprising a housing, a magnetic component, a voice coil, a spider, and a cone, the cone being disposed at one end of the housing, and the magnetic component, voice coil, and spider all being disposed on the inner side of the housing; characterized in that: The magnetic component includes a first magnet and a second magnet. The first magnet is matched and installed at one end of the housing. The second magnet is coaxially sleeved inside the first magnet and is detachably fixed to the first magnet through a positioning component. One end of the voice coil rests against the paper cone, and the other end extends between the first magnet and the second magnet; The two ends of the spider abut against the outer wall of the voice coil and the inner wall of the housing, respectively.

2. The dual magnetic circuit structure of the ultra-thin woofer according to claim 1, characterized in that, The housing is a centrally symmetrical box structure with one end larger than the other. The larger end is fitted with the paper cone, and the smaller end forms a countersunk groove. The first magnet is installed on the countersunk groove. The positioning member is located at the end of the first magnet away from the countersunk groove. The second magnet is located on the side wall of the positioning member facing the speaker.

3. The dual magnetic circuit structure of the ultra-thin woofer according to claim 2, characterized in that, The inner wall of the countersunk hole groove has a stepped structure, and the first magnet is attached to the side wall with a smaller outer contour on the countersunk hole groove.

4. The dual magnetic circuit structure of the ultra-thin woofer according to claim 1, characterized in that, The sidewall of the housing has a stepped structure and a first shoulder and a second shoulder are formed on its inner wall. A paper cone support is provided on the first shoulder, and the paper cone is provided on the paper cone support. The paper cone extends outward toward the outside of the speaker and extends to the outside of the housing. One end of the spring abuts against the second shoulder.

5. The dual magnetic circuit structure of the ultra-thin woofer according to claim 4, characterized in that, The paper cone support is a thin-walled ring structure with an outer positioning part, a buffer part and an inner positioning part formed radially on it. The outer positioning part is a planar structure and is fixed to the first shoulder. The buffer part is an arc-shaped structure extending toward the inside of the speaker. The inner positioning part is a planar structure and is detachably fixed to the paper cone.

6. The dual magnetic circuit structure of the ultra-thin woofer according to any one of claims 1-5, characterized in that, The cone, voice coil, spring, first magnet, and second magnet are all coaxially arranged with the housing.

7. The dual magnetic circuit structure of the ultra-thin woofer according to claim 6, characterized in that, The first magnet is also detachably fixed with an annular baffle near the end of the paper cone. The outer wall of the annular baffle abuts against the housing. The second magnet is also detachably fixed with a washer towards the end of the paper cone. The washer and the annular baffle are coaxially arranged and respectively located inside and outside the voice coil.

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