CN220935319U

CN220935319U - Loudspeaker

Info

Publication number: CN220935319U
Application number: CN202420504026.9U
Authority: CN
Inventors: 魏学东
Original assignee: Gettop Acoustic Co Ltd
Current assignee: Gettop Acoustic Co Ltd
Priority date: 2024-03-15
Filing date: 2024-03-15
Publication date: 2024-05-10
Anticipated expiration: 2034-03-15

Abstract

The utility model provides a loudspeaker, which is characterized in that: including magnetic circuit and the first vibration system and the second vibration system of setting in magnetic circuit both sides, magnetic circuit includes center magnet steel and limit magnet steel and connects the support piece of center magnet steel and limit magnet steel, support piece sets up as an organic wholely, center magnet steel and limit magnet steel are all fixed on support piece. The whole magnetic circuit is combined through the supporting piece, so that the space is saved, and the whole magnetic induction intensity of the magnetic circuit system is improved; the magnetic circuit supporting piece is connected with the central magnetic steel, so that the overall reliability of the loudspeaker is improved; the effective amplitude area is increased through the scheme of the bidirectional vibrating diaphragm, the purpose of improving the frequency response is achieved, meanwhile, the performance and the amplitude consistency of the first vibrating system and the second vibrating system are guaranteed, the distortion of the loudspeaker is reduced, the vibration of the whole loudspeaker is eliminated, and excellent acoustic performance and better user experience are provided for the loudspeaker.

Description

Loudspeaker

Technical Field

The utility model relates to the field of electronic products, in particular to a loudspeaker.

Background

Consumer electronics such as televisions, notebook computers, tablet computers, mobile phones and the like are thinner and thinner, and the new energy automobile industry has similar requirements for thinning and light weight, so that the requirements for acoustic performance are higher and higher on the premise of thinning the structure. The traditional loudspeaker products for multimedia are difficult to thin in structure because of the paper cone, the fixed core support piece, the ferrite magnet and the basin frame structure; the micro-speaker product for the mobile phone can be thinned, but the area is smaller than the electromagnetic driving force, and the acoustic performance of the speaker cannot meet the industry requirement. As shown in detail in the equation of fig. 6, SPLmax in the first equation is the maximum sound pressure level of the speaker, known as the sound level, δ is the speaker efficiency, rt is the total thermal resistance of the coil to the ambient path, and α is the thermal coefficient of the voice coil wire. From this formula, it can be seen that the higher the efficiency δ of the speaker, the greater its sound pressure level. In the second formula above, ρ is the air density, c is the air sound velocity, B is the magnetic field strength, l is the speaker voice coil line length, sd is the effective area of the speaker, re is the speaker coil resistance, and Mms is the speaker vibration system mass. From this formula, it can be seen that the efficiency of the speaker is proportional to (Bl) 2 and Sd2, i.e. the stronger the magnetic field strength, the longer the coil, the larger the effective area of the speaker, the higher the efficiency of the speaker, and finally the higher the sound pressure level thereof, which is three effective means how to effectively improve the acoustic performance of the speaker.

If the area of the micro-speaker structure for the mobile phone is simply made large, the effect of different performances of the two sides is easily caused.

The patent CN 114866925A 'sound producing device and sound producing equipment' structurally comprises three magnetic circuits of a common magnet, a center magnet and a side magnet and two voice coils with different sizes. The scheme has three problems, namely, the voice coil is in staggered design and is of an asymmetric structure, and the realization of the performance and the amplitude of two sides is very difficult; secondly, two vibration systems adopt the same inner chamber, and the vibration system of one side easily causes the influence to the vibration system of opposite side, and thirdly, the magnetic circuit combination is loaded down with trivial details, and the equipment realizes with high difficulty.

Patent CN 212324356U, "a double-drive double-sided sounding speaker", structurally shares a magnetic conduction plate, and the first sounding body and the second sounding body are symmetrically arranged with the shared magnetic conduction plate as a symmetry plane. Further, the first magnetic circuit system and the second magnetic circuit system are symmetrically arranged relative to the common magnetic conduction plate, the first vibration system is arranged on the outer side of the first magnetic circuit system, and the second vibration system is arranged on the outer side of the second magnetic circuit system. However, the scheme is designed with 10 magnetic steels, and the symmetrical magnetic steels are opposite in magnetizing direction, so that the assembly is difficult and the process is complex.

Disclosure of utility model

The utility model aims to overcome the defects of the prior art and provide a loudspeaker.

The aim of the utility model is achieved by the following technical measures: a loudspeaker, characterized by: including magnetic circuit and the first vibration system and the second vibration system of setting in magnetic circuit both sides, magnetic circuit includes center magnet steel and limit magnet steel and connects the support piece of center magnet steel and limit magnet steel, support piece sets up as an organic wholely, center magnet steel and limit magnet steel are all fixed on support piece.

As a preferable scheme, the support member comprises a first installation table for installing the central magnetic steel and a second installation table for installing the side magnetic steel, wherein the first installation table is positioned at the middle position, the second installation table is positioned at the circumference of the first installation table, and the first installation table and the second installation table are positioned at the first horizontal plane.

As a preferable scheme, the adjacent second installation tables are connected through a connecting table, the first installation tables are connected with the connecting table through a cantilever, the connecting table is located on a second horizontal plane, and a drop is formed between the first horizontal plane and the second horizontal plane.

As a preferred scheme, first vibration system includes first vibrating diaphragm subassembly and first voice coil loudspeaker voice coil, and first voice coil loudspeaker voice coil bonds and is close to magnetic circuit's one side at first vibrating diaphragm subassembly, second vibration system includes second vibrating diaphragm subassembly and second voice coil loudspeaker voice coil, and the second voice coil loudspeaker voice coil bonds and is close to magnetic circuit's one side at second vibrating diaphragm subassembly.

As a preferable scheme, the cantilever part forms an avoidance groove for avoiding the first voice coil, the distance from the first voice coil to the cantilever at the bottom of the avoidance groove is larger than the vibration distance of the first voice coil, and the distance from the second voice coil to the cantilever at the bottom of the avoidance groove is larger than the vibration distance of the second voice coil.

As a preferable scheme, the distance from the first voice coil to the cantilever at the bottom of the avoidance groove is equal to the distance from the second voice coil to the cantilever at the bottom of the avoidance groove.

As a preferred solution, the support is made of magnetically conductive material.

As a preferable scheme, the thicknesses of the center magnetic steel and the side magnetic steel are the same.

As a preferable scheme, one side of the central magnetic steel far away from the support piece is fixedly provided with a central pole piece, the area of the central pole piece, which is covered by the central magnetic steel, is equal to that of the first mounting table, one side of the side magnetic steel far away from the support piece is fixedly provided with a side pole piece, and the area of the side pole piece, which is covered by the side magnetic steel, is equal to that of the second mounting table.

As a preferred scheme, the one end that first voice coil loudspeaker voice coil kept away from first vibrating diaphragm subassembly is connected with first flexible line way board, first flexible line way board is provided with a plurality ofly, is the symmetry form and distributes along first voice coil loudspeaker voice, the one end that second vibrating diaphragm subassembly was kept away from to the second voice coil loudspeaker voice coil is connected with the second flexible line way board, the second flexible line way board is provided with a plurality ofly, is the symmetry form and distributes along the second voice coil loudspeaker voice coil.

Due to the adoption of the technical scheme, compared with the prior art, the utility model has the advantages that: by arranging the first vibration system and the second vibration system which are symmetrical, the radiation area of the loudspeaker is increased, the sensitivity of the loudspeaker is improved, and double-sided sound production can be realized, so that the same-phase sound can be produced, and the opposite-phase sound can be produced; the effective amplitude area is increased through the scheme of the bidirectional vibrating diaphragm, the purpose of improving the frequency response is achieved, meanwhile, the performance and the amplitude consistency of the first vibrating system and the second vibrating system are guaranteed, the distortion of the loudspeaker is reduced, the vibration of the whole loudspeaker is eliminated, and the loudspeaker is excellent in acoustic performance and better in user experience; the whole magnetic circuit is combined through the supporting piece, so that the space is saved, and the whole magnetic induction intensity of the magnetic circuit system is improved; the magnetic circuit supporting piece is connected with the central magnetic steel, so that the overall reliability of the loudspeaker is improved; the effective amplitude area is increased through the scheme of the bidirectional vibrating diaphragm, the purpose of improving the frequency response is achieved, meanwhile, the performance and the amplitude consistency of the first vibrating system and the second vibrating system are guaranteed, the distortion of the loudspeaker is reduced, the vibration of the whole loudspeaker is eliminated, and excellent acoustic performance and better user experience are provided for the loudspeaker.

The utility model is further described below with reference to the drawings and the detailed description.

Drawings

Fig. 1 is a schematic diagram of an exploded structure of a speaker according to the present utility model.

Fig. 2 is a schematic cross-sectional view of a speaker of the present utility model.

Fig. 3 is a schematic diagram of a magnetic circuit system of a speaker according to the present utility model.

Fig. 4 is a schematic perspective view of a support member for a speaker according to the present utility model.

Fig. 5 is a schematic top view of a speaker support according to the present utility model.

Fig. 6 is a formula in the background of the utility model.

Wherein: 1-center magnetic steel; 2-side magnetic steel; 3-a support; 4-a first basin stand; 5-a second basin stand; 6-a first mounting stage; 7-a second mounting stage; 8-connecting a table; 9-cantilever; 10-connecting arms; 11-a first diaphragm assembly; 12-a first voice coil; 13-a second diaphragm assembly; 14-a second voice coil; 15-a central pole piece; 16-edge pole pieces; 17-a first flexible circuit board; 18-a second flexible circuit board.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Examples: as shown in fig. 1-5, a loudspeaker comprises a magnetic circuit system, a first vibration system and a second vibration system, wherein the first vibration system and the second vibration system are arranged on two sides of the magnetic circuit system, the magnetic circuit system comprises a center magnetic steel 1 and a side magnetic steel 2, and the center magnetic steel 1 and the side magnetic steel 2 are connected through a supporting piece 3. The support piece 3 sets up as an organic whole, and center magnet steel 1 and limit magnet steel 2 are all fixed on support piece 3, and center magnet steel 1 is connected to support piece 3, has improved the whole reliability of speaker. The support member 3 is located at one side of the center magnetic steel 1 and the side magnetic steel 2, and in this embodiment, is located at one side close to the first vibration system, and wraps and fixes the center magnetic steel 1 to support the center magnetic steel 1. The supporting piece 3 forms an integrated magnetic circuit with the center magnetic steel 1 and the side magnetic steel 2, so that the space is saved, and the overall magnetic induction intensity of the magnetic circuit system is improved.

As shown in fig. 1-2, the first vibration system and the second vibration system are symmetrically arranged with respect to the magnetic circuit system. The first vibration system is fixed through the first basin frame 4, the second vibration system is fixed through the second basin frame 5, the first basin frame 4 and the second basin frame 5 are symmetrically arranged along the vibration direction, and the structure and the size of the first vibration system and the second vibration system are the same. In this embodiment, the central magnetic steel 1 is located in the central portion, and is provided with one, rectangular arrangement, and the side magnetic steel 2 is provided with four, and four sides corresponding to the central magnetic steel 1 respectively are provided. The magnetic circuit system is shared by the first vibration system and the second vibration system, so that space is saved, the radiation area of the loudspeaker is increased, the sensitivity of the loudspeaker is improved, double-sided sound production can be realized, and in-phase sound can be generated.

As shown in fig. 4-5, the supporting member 3 includes a first mounting table 6 for mounting the center magnetic steel 1 and a second mounting table 7 for mounting the side magnetic steel 2, the first mounting table 6 is located at a middle position, the second mounting table 7 is provided with four, and is located at four sides of the first mounting table 6, the first mounting table 6 and the second mounting table 7 are located at the same horizontal plane, and are defined as a first horizontal plane, so that the mounting surfaces of the center magnetic steel 1 and the side magnetic steel 2 are located at the same horizontal plane, and in this embodiment, the thicknesses of the center magnetic steel 1 and the side magnetic steel 2 are the same, so that the side, away from the supporting member 3, of the center magnetic steel 1 and the side magnetic steel 2, that is, the side, close to the second vibration system is also located at the same horizontal plane, so that the influence of the whole magnetic circuit system on the first vibration system and the second vibration system is completely the same, not only can increase the effective amplitude area of the loudspeaker, but also ensure the performance and amplitude consistency of the first vibration system and the second vibration system, reduce the distortion of the loudspeaker, eliminate the vibration, give excellent acoustic performance and better user experience to the loudspeaker.

As shown in fig. 4 to 5, the adjacent second mounting tables 7 are connected by connecting tables 8, and the connecting tables 8 are located at the positions corresponding to the four corners of the first mounting table 6, in this embodiment, four connecting tables 8 are located on the same horizontal plane, and the second horizontal plane is defined. There is the drop between first horizontal plane and the second horizontal plane, namely connect the platform 8 and be located different horizontal planes with first mount table 6 and second mount table 7, connect through cantilever 9 between first mount table 6 and the connection platform 8, four connection platform 8 correspond four cantilever 9, four cantilever 9 set up respectively in the four corners department of first mount table 6 that corresponds with four connection platform 8. The second installation table 7 is connected with the connection table 8 through the connection arm 10, the second installation table 7 between the adjacent connection tables 8 is located in the formed groove, and the first connection table 8 is also located in the formed groove, so that the wrapping area of the edge magnetic steel 2 and the center magnetic steel 1 can be increased, and the stability is improved.

As shown in fig. 2-4, the first vibration system comprises a first vibration film assembly 11 and a first voice coil 12, the first vibration film assembly 11 is fixedly installed on the first basin frame 4, the first voice coil 12 is adhered to one side, close to the magnetic circuit, of the first vibration film assembly 11, the second vibration system comprises a second vibration film assembly 13 and a second voice coil 14, the second vibration film assembly 13 is fixedly installed on the second basin frame 5, and the second voice coil 14 is adhered to one side, close to the magnetic circuit, of the second vibration film assembly 13. The cantilever 9 department forms the groove of dodging of first voice coil loudspeaker voice coil 12, and the distance of first voice coil loudspeaker voice coil 12 and second voice coil loudspeaker voice coil 14 to dodging cantilever 9 of groove bottom is greater than the vibration distance of first voice coil loudspeaker voice coil 12 and second voice coil 14, guarantees that the vibration of first voice coil loudspeaker voice coil 12 and second voice coil loudspeaker voice coil 14 can not receive the influence, and in this embodiment, the distance of first voice coil loudspeaker voice coil 12 and second voice coil loudspeaker voice coil 14 to dodging cantilever 9 of groove department bottom equals. The shape of the folded ring in the first diaphragm assembly 11 and the second diaphragm assembly 13 may be concave or convex.

In this embodiment, support piece 3 sets up for integrated into one piece, and center magnet steel 1 is fixed on first mount table 6 in the bonding, and limit magnet steel 2 is fixed on second mount table 7 in the bonding, constitutes integrative magnetic circuit, has saved the space, has improved magnetic circuit's whole magnetic induction intensity simultaneously.

The support 3 is made of a magnetic conductive material, and may be SPCC or SUS416. A central pole piece 15 is fixedly arranged on one side of the central magnetic steel 1, which is far away from the supporting piece 3, and an edge pole piece 16 is fixedly arranged on one side of the edge magnetic steel 2, which is far away from the supporting piece 3. As shown in fig. 2, the area of the central pole piece 15 covering the central magnetic steel 1 is equal to that of the first mounting table 6, and the area of the side pole piece 16 covering the side magnetic steel 2 is equal to that of the second mounting table 7.

One end of the first voice coil 12 far away from the first vibrating diaphragm assembly 11 is connected with a first flexible circuit board 17, in this embodiment, the first flexible circuit board 17 is provided with four, is symmetrically distributed along the first voice coil 12, and can effectively prevent the first voice coil 12 from deflecting in the vibration process. The end of the second voice coil 14 away from the second diaphragm assembly 13 is connected with a second flexible circuit board 18, and in this embodiment, four second flexible circuit boards 18 are symmetrically distributed along the second voice coil 14. The first flexible wiring board 17 and the second flexible wiring board 18 can further maintain the stability of the entire system.

Claims

1. A loudspeaker, characterized by: including magnetic circuit and the first vibration system and the second vibration system of setting in magnetic circuit both sides, first vibration system and second vibration system are the symmetry setting for magnetic circuit, magnetic circuit includes center magnet steel and limit magnet steel and connects the support piece of center magnet steel and limit magnet steel, support piece sets up as an organic wholely, center magnet steel and limit magnet steel are all fixed on support piece.

2. A loudspeaker according to claim 1, wherein: the support piece comprises a first installation table for installing the center magnetic steel and a second installation table for installing the edge magnetic steel, wherein the first installation table is located at the middle position, the second installation table is located in the circumferential direction of the first installation table, and the first installation table and the second installation table are located in the first horizontal plane.

3. A loudspeaker according to claim 2, wherein: the adjacent second installation tables are connected through a connecting table, the first installation tables are connected with the connecting table through cantilevers, the connecting table is located on a second horizontal plane, and a fall is arranged between the first horizontal plane and the second horizontal plane.

4. A loudspeaker according to claim 3, wherein: the first vibration system comprises a first vibrating diaphragm assembly and a first voice coil, the first voice coil is adhered to one side, close to the magnetic circuit, of the first vibrating diaphragm assembly, the second vibration system comprises a second vibrating diaphragm assembly and a second voice coil, and the second voice coil is adhered to one side, close to the magnetic circuit, of the second vibrating diaphragm assembly.

5. A loudspeaker according to claim 4, wherein: the cantilever is located to form the avoidance groove of dodging first voice coil, the first voice coil loudspeaker voice coil is greater than the vibration distance of first voice coil loudspeaker voice coil to the cantilever of dodging the groove bottom, the second voice coil loudspeaker voice coil is greater than the vibration distance of second voice coil loudspeaker voice coil to the cantilever of dodging the groove bottom.

6. A loudspeaker according to claim 5, wherein: the distance from the first voice coil to the cantilever at the bottom of the avoidance groove is equal to the distance from the second voice coil to the cantilever at the bottom of the avoidance groove.

7. A loudspeaker according to any one of claims 1 to 6, wherein: the support piece is made of magnetic conductive materials.

8. A loudspeaker according to any one of claims 1 to 6, wherein: the thickness of the center magnetic steel is the same as that of the side magnetic steel.

9. A loudspeaker according to any one of claims 1 to 6, wherein: the side of the center magnetic steel, which is far away from the support piece, is fixedly provided with a center pole piece, the area of the center pole piece, which is covered by the first mounting table, is equal to that of the center magnetic steel, the side of the side magnetic steel, which is far away from the support piece, is fixedly provided with a side pole piece, and the area of the side pole piece, which is covered by the side magnetic steel, is equal to that of the second mounting table.

10. A loudspeaker according to any one of claims 4 to 6, wherein: the one end that first voice coil loudspeaker voice coil kept away from first vibrating diaphragm subassembly is connected with first flexible line way board, first flexible line way board is provided with a plurality ofly, is the symmetry form and distributes along first voice coil loudspeaker voice coil, the one end that second voice coil loudspeaker voice coil kept away from second vibrating diaphragm subassembly is connected with the second flexible line way board, the second flexible line way board is provided with a plurality ofly, is the symmetry form and distributes along the second voice coil loudspeaker voice coil.