CN216852331U

CN216852331U - Double-magnet loudspeaker magnetic circuit structure and double-magnet loudspeaker

Info

Publication number: CN216852331U
Application number: CN202220592240.5U
Authority: CN
Inventors: 胡强
Original assignee: Suzhou Dengbao Electronic Technology Co ltd
Current assignee: Suzhou Dengbao Electronic Technology Co ltd
Priority date: 2022-03-17
Filing date: 2022-03-17
Publication date: 2022-06-28
Anticipated expiration: 2032-03-17

Abstract

The utility model relates to a two magnet speaker magnetic circuit structure, it includes two magnets, yoke and coil. The double magnets are arranged in the magnet yoke, and the coil is positioned between the inner wall of the magnet yoke and the outer walls of the double magnets. The double magnets comprise a first magnet, a second magnet and a non-magnetic washer, the first magnet and the second magnet are arranged oppositely, and the magnetism of the opposite surfaces of the first magnet and the second magnet is the same. The non-magnetic washer is stacked between the first magnet and the second magnet. The washer made of magnetic conductive material is not needed, and magnetic lines of force can be gathered in the gap of the upper and lower magnetic circuits due to the repulsion effect. The non-magnetic washer effectively reduces the self-inductance coefficient of the loudspeaker, reduces the inductive reactance of a high frequency band, and improves the high frequency response of the loudspeaker. The self-inductance coefficient of the loudspeaker cannot be increased by increasing the thickness of the washer, the thickness of the non-magnetic-conduction washer is increased under the condition of meeting the magnetic field intensity, the height of a horizontal magnetic field in a magnetic gap can be increased, the coil is ensured to be positioned in a linear magnetic field as much as possible when vibrating up and down, and the non-linear distortion is reduced.

Description

Double-magnet loudspeaker magnetic circuit structure and double-magnet loudspeaker

Technical Field

The utility model relates to a speaker technical field especially relates to a two magnet speaker magnetic structure and two magnet speaker.

Background

The alternating current is input into the coil to generate an alternating magnetic field, and the movement perpendicular to the current direction of the coil is performed under the action of the permanent magnet and the alternating magnetic field. The coil moves to drive the paper basin to vibrate forwards and backwards, and the vibration of the paper basin pushes the air to vibrate, so that people can feel sound. The larger the alternating current is, the stronger the magnetic field action is, the larger the vibration amplitude of the cone of the loudspeaker is, and the larger the corresponding sound is.

The existing loudspeaker only has one magnet, the magnetic induction field passing through the coil is not uniform and is in a divergence shape, and meanwhile, magnetic leakage can be formed in a magnetic circuit, namely, more magnetic induction field leaks to the outside of a magnetic gap and cannot pass through the coil, so that the magnetic field intensity at the position of the coil is reduced, and the sensitivity of the loudspeaker is influenced. In addition, the washer in the existing loudspeaker adopts a magnetic conductive material for gathering magnetic lines of force. The washer is made of the magnetic conductive material, so that the self-inductance coefficient of the loudspeaker is improved, the inductive reactance of a high-frequency section is improved, and the high-frequency response of the loudspeaker is reduced.

SUMMERY OF THE UTILITY MODEL

Technical problem to be solved

In view of the above-mentioned shortcomings and deficiencies of the prior art, the present invention provides a dual-magnet speaker magnetic circuit structure and a dual-magnet speaker, which solves the technical problems of poor speaker sensitivity and poor high-frequency response.

(II) technical scheme

In order to achieve the above object, the magnetic circuit structure of the dual-magnet speaker of the present invention comprises a dual magnet, a yoke and a coil;

the magnetic yoke is of a hollow structure with an opening at one end, the double magnets are arranged in the magnetic yoke, the coil is sleeved outside the double magnets, and the coil is positioned between the inner wall of the magnetic yoke and the outer walls of the double magnets;

the double magnets comprise a first magnet, a second magnet and a non-magnetic washer, the first magnet and the second magnet are arranged oppositely, and the magnetism of the opposite surfaces of the first magnet and the second magnet is the same;

the non-magnetic washer is stacked between the first magnet and the second magnet.

Optionally, the first magnet and the second magnet are parallel to each other, and the first end face of the first magnet is disposed opposite to the first end face of the second magnet.

Optionally, the first end face of the non-magnetic-conductive washer is abutted to the first end face of the first magnet, the second end face of the non-magnetic-conductive washer is abutted to the first end face of the second magnet, and the first end face and the second end face of the non-magnetic-conductive washer are a set of opposite faces.

Optionally, a central axis of the coil is collinear with a central axis of the first magnet, and planes where the first end face and the second end face of the non-magnetic washer are located can vertically penetrate through the coil.

Optionally, the first magnet and the second magnet are both permanent magnets.

Optionally, a plurality of first through holes are formed in the first magnet, the second magnet and the non-magnetic-conductive washer, the first magnet, the second magnet and the plurality of first through holes in the non-magnetic-conductive washer correspond to one another one to one, and a first positioning pin is sleeved in each first through hole.

Optionally, the first magnet is provided with a plurality of second through holes, and the second magnet is provided with a plurality of third through holes;

the surface of the non-magnetic washer opposite to the first magnet is provided with a plurality of second positioning pins, the surface of the non-magnetic washer opposite to the second magnet is provided with a plurality of third positioning pins, the second positioning pins are connected with the second through holes in a one-to-one correspondence mode, and the third positioning pins are connected with the third through holes in a one-to-one correspondence mode.

Optionally, the dual-magnet speaker magnetic circuit structure further comprises a plurality of bolts;

a plurality of fourth through holes are formed in the first magnet, the second magnet and the non-magnetic-conductive washer, and the fourth through holes in the first magnet, the second magnet and the non-magnetic-conductive washer are in one-to-one correspondence;

the bolt is sleeved in the fourth through hole and connected with the magnet yoke.

Furthermore, the utility model also provides a double-magnet loudspeaker, which comprises a shell, a basin frame, a cone and the double-magnet loudspeaker magnetic circuit structure;

the double-magnet loudspeaker magnetic circuit structure is arranged in the shell, and the first end of the basin stand is connected with the shell;

the first end of the cone is connected with the coil, and the second end of the cone is connected with the second end of the cone frame.

Optionally, the dual-magnet speaker further comprises a dust cover, and the dust cover is disposed on the cone.

(III) advantageous effects

In the utility model discloses in, adopt multiple structure to fix first magnet, second magnet and non-magnetism-conductive china department together, improved the flexibility and the stability of installation. The magnetic poles of the first magnet and the second magnet are oppositely arranged, so that washers made of magnetic conductive materials are not needed, and magnetic lines of force are gathered in a gap between the first magnet and the second magnet due to the repulsive action. The washer is made of the non-magnetic material, so that the self-inductance coefficient of the loudspeaker can be effectively reduced, the inductive reactance of a high frequency band is reduced, and the high-frequency response of the loudspeaker is effectively improved. Meanwhile, due to the fact that the non-magnetic washer is adopted, the self-inductance coefficient of the loudspeaker cannot be increased due to the fact that the thickness of the washer is increased, the thickness of the non-magnetic washer can be as thick as possible under the condition that the magnetic field intensity is met, and the height of a horizontal magnetic field in a magnetic gap can be greatly improved. The improvement of the height of the horizontal magnetic field in the magnetic gap can ensure that the coil is positioned in the linear magnetic field as much as possible when vibrating up and down, thereby effectively reducing the nonlinear distortion.

Drawings

Fig. 1 is a schematic structural diagram of a magnetic circuit structure of a dual-magnet speaker according to the present invention;

fig. 2 is a schematic structural diagram of embodiment 1 of the magnetic circuit structure of the dual-magnet speaker according to the present invention;

FIG. 3 is a schematic structural diagram of embodiment 2 of the magnetic circuit structure of the dual-magnet speaker of the present invention

Fig. 4 is a schematic structural diagram of embodiment 3 of the magnetic circuit structure of the dual-magnet speaker of the present invention

Fig. 5 is a schematic structural diagram of the dual-magnet speaker of the present invention.

[ description of reference ]

1: a first magnet; 2: a second magnet; 3: a non-magnetic washer; 4: a magnetic yoke; 5: a coil; 6: a first positioning pin; 7: a second positioning pin; 8: a third positioning pin; 9: a bolt; 10: a dual magnet; 11: a housing; 12: a basin stand; 13: a paper basin; 14: a dust cover.

Detailed Description

For a better understanding of the present invention, reference will now be made in detail to the present invention, examples of which are illustrated in the accompanying drawings. In which the terms "upper", "lower", etc. are used herein with reference to the orientation of fig. 1.

While exemplary embodiments of the invention are shown in the drawings, it should be understood that the invention can be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.

As shown in fig. 1, the present invention provides a dual-magnet speaker magnetic circuit structure, which includes a dual magnet 10, a yoke 4 and a coil 5. The yoke 4 has a hollow structure with one open end, and is preferably a hollow cylinder with one open end. The double magnets 10 are arranged in the magnet yoke 4, the coil 5 is sleeved outside the double magnets 10, and the coil 5 is suspended between the inner wall of the magnet yoke 4 and the outer wall of the double magnets 10. The double magnets 10 comprise a first magnet 1, a second magnet 2 and a non-magnetic washer 3, the non-magnetic washer 3 is of a non-magnetic structure, the first magnet 1 and the second magnet 2 are preferably permanent magnets, the first magnet 1 and the second magnet 2 are oppositely arranged, the opposite surfaces of the first magnet 1 and the second magnet 2 are identical in magnetism, and the non-magnetic washer 3 is overlapped between the first magnet 1 and the second magnet 2. Magnetic lines of force of the first magnet 1 and the second magnet 2 are gathered at the non-magnetic washer 3, and because the opposite surfaces of the first magnet 1 and the second magnet 2 have the same magnetism and are mutually repelled, the magnetic lines of force penetrate out from the side surface of the non-magnetic washer 3 and enter the side wall of the magnetic yoke 4 made of magnetic conductive material, and a magnetic gap with the horizontally distributed magnetic lines of force is formed. When an alternating current passes through the coil 5, the coil 5 vibrates up and down relative to the magnetic field under the action of the horizontal magnetic field. In the utility model discloses in, adopt multiple structure with first magnet 1, second magnet 2 and non-magnetism-conductive china department 3 fixed together, improved the flexibility and the stability of installation. The magnetic poles of the first magnet 1 and the second magnet 2 are oppositely arranged, so that the washer made of magnetic conductive material is not needed, and magnetic lines of force are gathered in the gap between the first magnet 1 and the second magnet 2 due to the repulsion action. The washer is made of the non-magnetic material, so that the self-inductance coefficient of the loudspeaker can be effectively reduced, the inductive reactance of a high frequency band is reduced, and the high-frequency response of the loudspeaker is effectively improved. Meanwhile, due to the fact that the non-magnetic-conductive washer 3 is adopted, the self-inductance coefficient of the loudspeaker cannot be increased due to the fact that the thickness of the washer is increased, the thickness of the non-magnetic-conductive washer 3 can be as thick as possible under the condition that the magnetic field intensity is met, and the height of a horizontal magnetic field in a magnetic gap can be greatly improved. The improvement of the height of the horizontal magnetic field in the magnetic gap can ensure that the coil 5 is positioned in the linear magnetic field as much as possible when vibrating up and down, thereby effectively reducing the nonlinear distortion.

Referring to fig. 1, the first magnet 1 and the second magnet 2 are preferably cylindrical structures, and the first magnet 1 and the second magnet 2 are parallel to each other, so that the magnetic lines of force gathered at the magnetic gap are kept horizontal, wherein the first end surface of the first magnet 1 is opposite to the first end surface of the second magnet 2. The non-magnetic washer 3 is also of a cylindrical structure, the non-magnetic washer 3 is overlapped between the first magnet 1 and the second magnet 2, so that the first end face of the non-magnetic washer 3 is abutted to the first end face of the first magnet 1, the second end face of the non-magnetic washer 3 is abutted to the first end face of the second magnet 2, and the first end face and the second end face of the non-magnetic washer 3 are a group of opposite faces.

Referring to fig. 1, the coil 5 is preferably a ring-shaped coil, and the coil 5 is sleeved outside the double magnet 10 formed by the first magnet 1, the second magnet 2 and the non-magnetic washer 3. The central axis of the coil 5 is collinear with the central axis of the first magnet 1, and the planes where the first end surface and the second end surface of the non-magnetic washer 3 are located can vertically penetrate through the coil 5. Preferably, the horizontal symmetrical plane of the non-magnetic washer 3 and the horizontal symmetrical plane of the coil 5 are coplanar, so that the coil 5 is ensured to be positioned in a linear magnetic field as much as possible when vibrating up and down, and the nonlinear distortion is effectively reduced.

In embodiment 1, as shown in fig. 2, a plurality of first through holes are formed in each of the first magnet 1, the second magnet 2 and the non-magnetic washer 3, and a plurality of first through holes penetrating through the first magnet 1, the second magnet 2 and the non-magnetic washer 3 are formed in the double magnet 10; the positions of the first through holes on the first magnet 1, the second magnet 2 and the non-magnetic washer 3 are in one-to-one correspondence, and a first positioning pin 6 is sleeved in each first through hole. Avoid because of first magnet 1 and second magnet 2 repel each other, in the installation, the phenomenon that horizontal rotation misplaces appears when first magnet 1 and second magnet pressfitting are connected on non-magnetic conduction china department 3 to the stability of two magnet 10 structures has been improved.

In embodiment 2, as shown in fig. 3, the first magnet 1 is provided with a plurality of second through holes, and the second magnet 2 is provided with a plurality of third through holes. A plurality of second positioning pins 7 are arranged on the surface of the non-magnetic washer 3 opposite to the first magnet 1, and a plurality of third positioning pins 8 are arranged on the surface of the non-magnetic washer 3 opposite to the second magnet 2. The positions of the second positioning pins 7 correspond to the positions of the second through holes one by one, and the second positioning pins 7 are inserted into the second through holes, so that the first magnet 1 is stably connected with the non-magnetic-conductive washer 3, and the phenomenon of rotation dislocation cannot occur. The positions of the third positioning pins 8 and the third through holes correspond to each other one by one, so that the second magnet 2 is stably connected with the non-magnetic-conductive washer 3, and the phenomenon of rotation dislocation cannot occur. The non-magnetic washer 3, the second positioning pin 7 and the third positioning pin 8 can be integrally formed by injection molding, or integrally formed by welding non-magnetic metal materials such as copper and aluminum or by powder metallurgy, so that the strength of the second positioning pin 7 and the third positioning pin 8 is improved.

In embodiment 3, as shown in fig. 3, the double magnets 10 of the magnetic circuit structure of the double-magnet speaker are fixed by a plurality of bolts 9 and fixed to the bottom plate of the yoke 4 by the bolts 9. The same as the embodiment 1, a plurality of fourth through holes penetrating through the first magnet 1, the second magnet 2 and the non-magnetic washer 3 are formed in the double magnets 10, the hole positions of the fourth through holes in the first magnet 1, the second magnet 2 and the non-magnetic washer 3 are all in one-to-one correspondence, the bolts 9 penetrate through the fourth through holes and then are connected with the magnet yoke 4, a fifth through hole can also be formed in the bottom plate of the magnet yoke 4, and the screw rod penetrates through the fourth through hole and the fifth through hole and then is in threaded connection with the nut, so that the disassembly is convenient. The screw rod is in the same place first magnet 1, non-magnetic washer 3, second magnet 2 and yoke 4 fixed connection, and the effect of location has still been played in the setting of a plurality of bolts 9, avoids first magnet 1 and second magnet 2 to take place the phenomenon of rotation dislocation.

Further, the utility model also provides a two magnet speaker, as shown in fig. 5, two magnet speaker include casing 11, basin frame 12, cone 13 and as above record two magnet speaker magnetic circuit structure. Wherein, two magnet speaker magnetic circuit structure set up in casing 11, and the first end and the casing 11 of basin frame 12 are connected, and the first end and the coil 5 of cone 13 are connected, and the second end of cone 13 is connected with the second end of basin frame 12. The double-magnet loudspeaker further comprises a dust cover 14, and the dust cover 14 is arranged on the cone 13 to prevent sundries from entering the magnetic circuit structure of the double-magnet loudspeaker.

In the utility model discloses in, adopt multiple structure with first magnet 1, second magnet 2 and non-magnetism-conductive china department 3 fixed together, improved the flexibility and the stability of installation. The magnetic poles of the first magnet 1 and the second magnet 2 are oppositely arranged, so that the washer made of magnetic conductive material is not needed, and magnetic lines of force are gathered in the gap between the first magnet 1 and the second magnet 2 due to the repulsion action. The washer is made of the non-magnetic material, so that the self-inductance coefficient of the loudspeaker can be effectively reduced, the inductive reactance of a high frequency band is reduced, and the high-frequency response of the loudspeaker is effectively improved. Meanwhile, due to the fact that the non-magnetic-conductive washer 3 is adopted, the self-inductance coefficient of the loudspeaker cannot be increased due to the fact that the thickness of the washer is increased, the thickness of the non-magnetic-conductive washer 3 can be as thick as possible under the condition that the magnetic field intensity is met, and the height of a horizontal magnetic field in a magnetic gap can be greatly improved. The improvement of the height of the horizontal magnetic field in the magnetic gap can ensure that the coil 5 is positioned in the linear magnetic field as much as possible when vibrating up and down, thereby effectively reducing the nonlinear distortion.

In the description of the present invention, it is to be understood that the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium; either as communication within the two elements or as an interactive relationship of the two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present application, unless otherwise expressly stated or limited, a first feature may be "on" or "under" a second feature, and the first and second features may be in direct contact, or the first and second features may be in indirect contact via an intermediate. Also, a first feature "on," "above," and "over" a second feature may be directly or obliquely above the second feature, or simply mean that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the second feature, or may simply mean that the first feature is at a lower level than the second feature.

In the description herein, the description of the terms "one embodiment," "some embodiments," "an embodiment," "an example," "a specific example" or "some examples" or the like, means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

While embodiments of the present invention have been shown and described, it is to be understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that modifications, alterations, substitutions and variations may be made to the above embodiments by those of ordinary skill in the art without departing from the scope of the present invention.

Claims

1. A double-magnet loudspeaker magnetic circuit structure is characterized in that the double-magnet loudspeaker magnetic circuit structure comprises a double magnet (10), a magnet yoke (4) and a coil (5);

the magnetic yoke (4) is of a hollow structure with an opening at one end, the double magnets (10) are arranged in the magnetic yoke (4), the coil (5) is sleeved outside the double magnets (10), and the coil (5) is positioned between the inner wall of the magnetic yoke (4) and the outer wall of the double magnets (10);

the double magnets (10) comprise a first magnet (1), a second magnet (2) and a non-magnetic washer (3), the first magnet (1) and the second magnet (2) are oppositely arranged, and the magnetism of the opposite surfaces of the first magnet (1) and the second magnet (2) is the same;

the non-magnetic washer (3) is superposed between the first magnet (1) and the second magnet (2).

2. The dual magnet speaker magnetic circuit structure of claim 1 wherein the first magnet (1) and the second magnet (2) are parallel to each other, and a first end face of the first magnet (1) is disposed opposite a first end face of the second magnet (2).

3. The dual-magnet speaker magnetic circuit structure of claim 2, wherein a first end surface of the non-magnetic conductive washer (3) abuts a first end surface of the first magnet (1), a second end surface of the non-magnetic conductive washer (3) abuts a first end surface of the second magnet (2), and the first end surface and the second end surface of the non-magnetic conductive washer (3) are a set of opposing surfaces.

4. A dual-magnet loudspeaker magnetic circuit structure as claimed in claim 3, wherein the central axis of the coil (5) is collinear with the central axis of the first magnet (1), and the planes of the first and second end faces of the non-magnetic washer (3) can both pass through the coil (5) perpendicularly.

5. A dual magnet loudspeaker magnetic circuit structure as claimed in any of claims 1-4, wherein the first magnet (1) and the second magnet (2) are both permanent magnets.

6. A dual-magnet loudspeaker magnetic circuit structure according to any of claims 1-4, wherein the first magnet (1), the second magnet (2) and the non-magnetic conductive washer (3) are all provided with a plurality of first through holes, the first magnet (1), the second magnet (2) and the non-magnetic conductive washer (3) are provided with a plurality of first through holes in a one-to-one correspondence, and each first through hole is internally sleeved with a first positioning pin (6).

7. The dual-magnet speaker magnetic circuit structure according to any of claims 1-4, wherein the first magnet (1) has a plurality of second through holes, and the second magnet (2) has a plurality of third through holes;

the non-magnetic washer (3) is provided with a plurality of second locating pins (7) on the face opposite to the first magnet (1), the non-magnetic washer (3) is provided with a plurality of third locating pins (8) on the face opposite to the second magnet (2), the second locating pins (7) are connected with the second through holes in a one-to-one correspondence mode, and the third locating pins (8) are connected with the third through holes in a one-to-one correspondence mode.

8. A dual-magnet loudspeaker magnetic circuit structure according to any of claims 1-4, wherein the dual-magnet loudspeaker magnetic circuit structure further comprises a plurality of bolts (9);

a plurality of fourth through holes are formed in the first magnet (1), the second magnet (2) and the non-magnetic-conductive washer (3), and the fourth through holes in the first magnet (1), the second magnet (2) and the non-magnetic-conductive washer (3) correspond to one another;

the bolt (9) is sleeved in the fourth through hole, and the bolt (9) is connected with the magnet yoke (4).

9. A dual-magnet loudspeaker, characterized in that it comprises a housing (11), a frame (12), a cone (13) and a dual-magnet loudspeaker magnetic circuit structure according to any of claims 1-8;

the double-magnet loudspeaker magnetic circuit structure is arranged in the shell (11), and the first end of the basin frame (12) is connected with the shell (11);

the first end of the cone (13) is connected with the coil (5), and the second end of the cone (13) is connected with the second end of the basin frame (12).

10. The dual magnet speaker of claim 9, further comprising a dust cover (14), said dust cover (14) being disposed on said cone (13).