CN117915247A

CN117915247A - Loudspeaker

Info

Publication number: CN117915247A
Application number: CN202410316961.7A
Authority: CN
Inventors: 陶伟伟; 金鑫; 张帆
Original assignee: AAC Microtech Changzhou Co Ltd
Current assignee: AAC Microtech Changzhou Co Ltd
Priority date: 2024-03-20
Filing date: 2024-03-20
Publication date: 2024-04-19
Anticipated expiration: 2044-03-20
Also published as: CN117915247B

Abstract

The invention provides a loudspeaker, which comprises a shell with an accommodating space and a sounding monomer for dividing the accommodating space into a front cavity and a rear cavity, wherein the shell is provided with a sounding port for communicating the front cavity with the outside, the sounding monomer comprises a vibration system and a magnetic circuit system, the vibration system comprises a vibrating diaphragm, the magnetic circuit system comprises a central magnetic circuit and a side magnetic circuit, the vibrating diaphragm comprises a rubber diaphragm and a ball top part fixed on the rubber diaphragm, the rubber diaphragm comprises an inner folding ring, an outer folding ring and a rubber diaphragm main body which is connected with the inner folding ring and the outer folding ring and covers the ball top part, the inner folding ring comprises an inner fixing part fixed on the central magnetic circuit, the loudspeaker further comprises an adhesive piece for adhering the inner fixing part and the shell, the ball top part comprises a first side edge close to the sounding port and a second side edge far away from the sounding port, and the rubber diaphragm main body at the second side edge is provided with a notch part which is formed by removing at least part of rubber and is used for balancing the amplitude of the first side edge and the second side edge. The loudspeaker provided by the invention can reduce the difference of the amplitudes and improve the acoustic stability of the product.

Description

Loudspeaker

Technical Field

The invention relates to the technical field of acoustoelectric, in particular to a loudspeaker.

Background

Along with the development of science and technology, portable electronic products, such as mobile phones, palm game consoles, navigation devices or palm multimedia entertainment devices, are widely used in daily life of people, and in these mobile electronic devices, a voice playing device is an essential component in the mobile electronic devices, and the user experience when users use these mobile electronic devices is directly affected by the voice quality, so the requirements on speakers applied therein are also increasing.

The speaker of the related art includes the shell that has accommodation space and separates accommodation space into the sound production monomer of front chamber and back chamber, and one side of shell is provided with the play sound outlet that communicates with the front chamber, and when vibration system vibration sound production, the gas velocity difference of one side of keeping away from the sound outlet and one side that is close to the sound outlet is big, easily causes the amplitude difference of both sides vibrating diaphragm big, produces performance problems such as vibration unbalance and sound distortion.

Accordingly, there is a need to provide a product that solves the above-mentioned problems.

Disclosure of Invention

The invention aims to provide a loudspeaker, which is used for reducing the maximum amplitude difference, improving the acoustic stability of the loudspeaker and ensuring that the low-frequency amplitude is not affected.

In order to achieve the above object, in an embodiment of the present invention, a speaker is provided, including a housing having an accommodating space and a sound generating unit accommodated in the accommodating space and dividing the accommodating space into a front cavity and a rear cavity, the housing includes an upper housing and a lower housing covering the upper housing, the upper housing is provided with a sound outlet for communicating the front cavity and the outside, the sound generating unit includes a basin frame, a vibration system and a magnetic circuit system fixed to the basin frame, the vibration system includes a diaphragm fixed to the basin frame and a voice coil driving the diaphragm to vibrate and generate sound, the diaphragm includes a rubber film and a ball top fixed to the rubber film, the rubber film includes an inner folded ring, an outer folded ring disposed outside the inner folded ring, and a rubber film main body connected to the inner folded ring and covering the ball top, the magnetic circuit system includes a lower clamping plate, a center magnetic circuit fixed to the lower clamping plate, and a magnetic circuit surrounding a magnetic circuit side disposed to form a magnetic gap, the inner folded ring includes a second magnetic circuit and an inner folded ring fixed to the center of the second magnetic circuit, and a second magnetic circuit is disposed to the side edge of the second magnetic circuit is further bonded to the second side edge and the second side edge, and the second magnetic circuit is further bonded to the second side edge and the second side edge is opposite to the second side edge and the second side edge is formed.

Preferably, the central magnetic circuit includes from first center magnet steel, the central pole core of lower plate stack in proper order establishes, second center magnet steel and third center magnet steel, the internal fixation portion has a lid form structure, and has the roof, from the roof to the lateral wall that lower plate direction extends and from the lateral wall is buckled the diapire of extension being fixed in on the second center magnet steel top surface, the roof laminate in the top surface of third center magnet steel, the lateral wall laminate in the side of third center magnet steel.

Preferably, the vibration system further comprises a frame fixedly connected with the voice coil and the diaphragm, the frame comprises a flat plate portion, a first extending portion extending from the outer edge of the flat plate portion to the lower clamping plate in a bending mode, and a second extending portion extending from the inner edge of the flat plate portion to the lower clamping plate in a bending mode, the second extending portion comprises a first portion parallel to the vibration direction of the diaphragm and a second portion perpendicular to the first portion, the voice coil is fixed to the second portion and inserted into the magnetic gap, the flat plate portion serves as the top of the ball, and the rubber film body covers the flat plate portion.

Preferably, the vibration system further comprises a flexible support member and an auxiliary vibrating diaphragm, wherein the flexible support member is arranged at intervals with the vibrating diaphragm, the auxiliary vibrating diaphragm is fixed on one side, away from the vibrating diaphragm, of the flexible support member, and the flexible support member is fixed between the basin frame and the first extension portion.

Preferably, the periphery of the outer folding ring is fixed on the basin frame, and the basin frame, the rubber film and the framework are integrally formed.

Preferably, the lower clamping plate is provided with an avoidance groove for avoiding the voice coil, the side magnetic circuit comprises side magnetic steel fixed on the lower clamping plate and a side pole core attached to the side magnetic steel, and the side pole core is fixedly held on the basin frame.

Preferably, the speaker further comprises a fixing part for fixedly supporting the sounding unit, the fixing part comprises a first fixing part and a second fixing part which are clamped between the lower shell and the sounding unit, and the first fixing part and the second fixing part have different thicknesses in the direction that the upper shell points to the lower shell.

Preferably, the notch is formed by laser photoresist cleaning.

Preferably, the lower housing is further provided with a leakage hole for communicating the rear cavity with the outside.

Preferably, the second central magnetic steel and the third central magnetic steel are integrated magnetic steel.

The novel loudspeaker comprises a shell with an accommodating space and a sound production monomer accommodated in the accommodating space and dividing the accommodating space into a front cavity and a rear cavity, wherein the shell comprises an upper shell and a lower shell covered with the upper shell, the upper shell is provided with a sound production port used for communicating the front cavity and the outside, the sound production monomer comprises a basin frame, a vibration system and a magnetic circuit system, the vibration system comprises a vibrating diaphragm and a voice coil, the vibrating diaphragm is fixed on the basin frame, the voice coil is used for driving the vibrating diaphragm to vibrate and produce sound, the vibrating diaphragm comprises a rubber film and a ball top part, the rubber film comprises an inner folded ring, an outer folded ring is arranged on the outer side of the inner folded ring, and a rubber film main body which is connected with the inner folded ring and covers the ball top part, the magnetic circuit system comprises a lower clamping plate, a central magnetic circuit and a side magnetic circuit which surrounds the central magnetic circuit and is used for forming a magnetic gap, the inner folded ring comprises a vibrating diaphragm and a second side edge which is fixed on the center of the basin frame, the vibrating diaphragm comprises a second side edge and a second side edge which is provided with a second side edge which is far away from the sound production port, and a side edge which is formed by at least a second side edge which is opposite to the second side edge of the loudspeaker, and the second side edge which is provided with a side edge which is adhered to the second side edge and is provided with a side edge which is at least one side edge which is far from the side edge of the loudspeaker. In the structure, the mass of the sounding monomer on one side far away from the sound outlet is reduced by locally removing the rubber film main body covered on the top of the ball, so that the acoustic resistance of the sound outlet side and the acoustic resistance of the non-sound outlet side are balanced, the difference of the maximum amplitude is reduced, the acoustic stability of the product is improved, and the low-frequency amplitude is not influenced.

Drawings

For a clearer description of the technical solutions of the embodiments of the present invention, the drawings that are needed in the description of the embodiments will be briefly introduced below, it will be obvious that the drawings in the description below are only some embodiments of the present invention, and other drawings can be obtained according to these drawings without inventive effort for a person having ordinary skill in the art of the present invention, wherein:

Fig. 1 is a perspective view of a speaker of the present invention;

fig. 2 is an exploded view of the speaker of the present invention;

fig. 3 is a cross-sectional perspective view of the speaker of the present invention taken along line A-A of fig. 1;

FIG. 4 is an enlarged view of a portion C of FIG. 3;

Fig. 5 is a perspective view of a rubber membrane in the speaker of the present invention;

fig. 6 is a cross-sectional view of the speaker of the present invention taken along line B-B of fig. 1.

Reference numerals:

1000. A speaker;

1. a housing; 10. an accommodation space; 101. a front cavity; 102. a rear cavity; 11. an upper housing; 11a, an acoustic outlet; 12. a lower housing; 12a, leakage holes;

2. A sounding monomer; 21. a basin stand; 22. a vibration system; 23. a magnetic circuit system; 231. a lower clamping plate; 2311. an avoidance groove; 232. a central magnetic circuit; 2321. a first center magnetic steel; 2322. a central pole core; 2323 a second center magnetic steel; 2324. a third center magnetic steel; 233. a magnetic gap; 234. a side magnetic circuit; 2341. edge magnetic steel; 2342. an edge pole core;

3. A vibrating diaphragm; 31. a rubber film; 311. an inner folding ring; 3111. an inner fixing part; 3111a, top wall; 3111b, sidewalls; 3111c, bottom wall; 312. an outer fold ring; 313. a rubber film body; 3131. a notch portion; 32. a ball top; 321. a first side; 322. a second side;

4. A voice coil;

5. An adhesive member;

6. a skeleton; 61. a flat plate portion; 62. a first extension; 63. a second extension; 631 a first portion; 632. a second portion;

7. a flexible support; 8. an auxiliary vibrating diaphragm;

9. A fixing member; 91. a first fixing member; 92. and a second fixing member.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention. All other embodiments, which can be made by one of ordinary skill in the art without undue burden on the person of ordinary skill in the art based on embodiments of the present invention, are within the scope of the present invention.

As shown in fig. 1 to 6, the present invention provides a speaker 1000 including a housing 1 having an accommodating space 10 and a sounding body 2 accommodated in the accommodating space 10, the sounding body 2 dividing the accommodating space 10 into a front cavity 101 and a rear cavity 102.

As shown in fig. 1-2, the casing 1 includes an upper casing 11 and a lower casing 12 covering the upper casing 11, the upper casing 11 is provided with an acoustic outlet 11a for guiding the sound generated by the sounding unit 2 out of the loudspeaker, the lower casing 12 is provided with a leakage hole 12a communicating the rear cavity 102 with the outside, and the opening of the leakage hole 12a can prevent the diaphragm 3 from having a tympanic membrane or collapsing membrane phenomenon, and influence the acoustic performance of the product.

The sounding unit 2 includes a tub 21, a vibration system 22 and a magnetic circuit system 23 fixed to the tub 21.

The vibration system 22 includes a diaphragm 3 fixed to a frame 21 and a voice coil 4 driving the diaphragm 3 to vibrate and sound, the diaphragm 3 includes a rubber film 31 and a dome portion 32 fixed to the rubber film 31, the rubber film 31 includes an inner ring 311, an outer ring 312 provided outside the inner ring 311, and a rubber film main body 313 connecting the inner ring 311 and the outer ring 312 and covering the dome portion 32, the magnetic circuit 23 includes a lower clamp plate 231, a center magnetic circuit 232 fixed to the lower clamp plate 231, and a side magnetic circuit 234 provided around the center magnetic circuit 232 to form a magnetic gap 233, the inner ring 311 includes an inner fixing portion 3111 fixed to the center magnetic circuit 232, the speaker further includes an adhesive member 5 bonding the inner fixing portion 3111 and the upper case 11, the dome portion 32 includes a first side 321 near the sound outlet 11a and a second side 322 remote from the sound outlet 11a, the first side 321 and the second side 322 are located on opposite sides of the adhesive member 5, respectively, the rubber film main body 313 at the second side 322 is provided with a notch 31 for balancing the amplitude of the first side 321 and the second side 322 formed by removing at least part of rubber.

It should be noted that, the thickness of the rubber film 31 and the shape and size of the notch 3131 can be adjusted accordingly according to the actual situation, the shape of the notch 3131 is not limited herein, in this embodiment, the notch 3131 is formed by laser glue cleaning, and the like, and this method has the advantage that the notch can be opened dynamically according to the positions of the sound outlets, so as to improve the matching degree of applying the sound generating unit to the housing having different sound outlet positions.

Specifically, as shown in fig. 2-3, the vibration system 22 includes a diaphragm 3 fixed on the frame 21, a voice coil 4 driving the diaphragm 3 to vibrate and sound, and a frame 6 connecting the diaphragm 3 and the voice coil 4, the diaphragm 3 includes a rubber film 31 and a dome portion 32 fixed on the rubber film 31, wherein the rubber film 31 includes an inner fold ring 311, an outer fold ring 312 disposed on the outer side of the inner fold ring 311, and a rubber film main body 313 connecting the inner fold ring 311 and the outer fold ring 312 and covering the dome portion 32, the outer periphery of the outer fold ring 312 is fixed on the frame 21, and the frame 21, the rubber film 31, and the frame 6 are integrally formed.

As shown in fig. 2 and 4, the bobbin 6 includes a flat plate portion 61, a first extension portion 62 extending from an outer edge of the flat plate portion 61 to the lower clamp 231 and a second extension portion 63 extending from an inner edge of the flat plate portion 61 to the lower clamp 231, the second extension portion 63 including a first portion 631 parallel to a vibration direction of the diaphragm 3and a second portion 632 perpendicular to the first portion 631, the voice coil 4 being fixed to the second portion 632 and inserted into the magnetic gap 233, the flat plate portion 61 serving as the ball top 32, and the rubber film main body 313 covering the flat plate portion 61.

Specifically, as shown in fig. 6, the vibration system 22 further includes a flexible support member 7 disposed at intervals with the diaphragm 3, and an auxiliary diaphragm 8 fixed on one side of the flexible support member 7 away from the diaphragm 3, where the flexible support member 7 is fixed between the basin stand 21 and the first extension portion 62, and the auxiliary diaphragm 8 can improve the low-frequency performance of the product.

Specifically, as shown in fig. 2, the magnetic circuit 23 includes a lower clamping plate 231, a central magnetic circuit 232 fixed on the lower clamping plate 231, and a side magnetic circuit 234 disposed around the central magnetic circuit 232 to form a magnetic gap 233, where the lower clamping plate 231 is provided with a avoiding slot 2311 for avoiding the voice coil 4, the central magnetic circuit 232 includes a first central magnetic steel 2321, a central pole core 2322, a second central magnetic steel 2323, and a third central magnetic steel 2324 stacked in sequence from the lower clamping plate 231, and it should be noted that the second central magnetic steel 2323 and the third central magnetic steel 2324 may be split magnetic steels or integral magnetic steels, and in this embodiment, the second central magnetic steel 2323 and the third central magnetic steel 2324 are integral magnetic steels; the side magnetic circuit 234 includes a side magnetic steel 2341 fixed to the lower clamp plate 231, a side pole core 2342 attached to the side magnetic steel 2341, the side pole core 2342 being held to the frame 21, the voice coil 4 being fixed to the second portion 632 of the bobbin 6 and inserted into the magnetic gap 233; and the voice coil 4 is electrically connected with the flexible supporting piece 7, and after being electrified, the voice coil 4 interacts with the magnetic circuit system 23 to drive the vibrating diaphragm 3 to vibrate and sound.

Specifically, as shown in fig. 4, the inner fixing portion 3111 has a cover-like structure, and includes a top wall 3111a, a side wall 3111b extending from the top wall 3111a toward the lower clamping plate 231, and a bottom wall 3111c bent from the side wall 3111b and fixed on the top surface of the second center magnetic steel 2323, the top wall 3111a is attached to the top surface of the third center magnetic steel 2324, and the side wall 3111b is attached to a side surface of the third center magnetic steel 2324.

The loudspeaker 1000 further comprises a fixing part 9 for fixedly supporting the sounding monomer 2, the fixing part 9 comprises a first fixing part 91 and a second fixing part 92 which are clamped between the lower shell 12 and the sounding monomer 2, the sounding monomer 2 can be clamped and fixed by the aid of the fixing part 9, stability of the sounding monomer 2 can be guaranteed when the loudspeaker falls down, and noise is prevented; the volume of the rear cavity 102 can also be increased, improving acoustic performance; it should be noted that, the first fixing member 91 and the second fixing member 92 have different thicknesses in the direction in which the upper case 11 is directed toward the lower case 12, so as to accommodate speaker housings of different shapes and sizes, and in this embodiment, the thickness of the first fixing member 91 is greater than that of the second fixing member 92.

Compared with the related art, the present invention balances acoustic resistance of the sound outlet side and the non-sound outlet side by providing the notch 3131 for balancing the amplitude of the first side 321 and the second side 322 formed by removing at least part of rubber on the rubber film main body 313 at the second side 322 far from the sound outlet 11a, reduces the difference of the maximum amplitude, improves the acoustic stability of the product, and the low frequency amplitude is not affected.

While the invention has been described with respect to the above embodiments, it should be noted that modifications can be made by those skilled in the art without departing from the inventive concept, and these are all within the scope of the invention.

Claims

1. The utility model provides a speaker, including having accommodation space's shell and accept in accommodation space just will the sound production monomer in front chamber and back chamber is separated into to the accommodation space, the shell includes the upper casing and closes the lower casing of upper casing, the upper casing is equipped with and is used for the intercommunication front chamber and external play sound opening, sound production monomer includes basin frame and is fixed in vibration system and the magnetic circuit of basin frame, vibration system including be fixed in vibrating diaphragm and the drive of basin frame the voice coil loudspeaker voice coil of vibrating the vibrating diaphragm, the vibrating diaphragm include the rubber membrane with be fixed in the ball top of rubber membrane, the rubber membrane include the infolding ring and connect infolding ring with the infolding ring and cover the rubber membrane main part at ball top, magnetic circuit includes the lower splint, is fixed in the center magnetic circuit of lower splint and encircle the magnetic circuit sets up in order to form the limit magnetic circuit of magnetic gap, the infolding ring is including being fixed in the center magnetic circuit inner portion vibrating diaphragm and drive the voice coil loudspeaker vibration sound production's voice coil loudspeaker, the rubber membrane includes the rubber membrane and is fixed in the ball top of rubber membrane outside infolding ring outside and connection just cover the infolding ring with the rubber membrane and the rubber membrane main part of ball top, the side is located in the second side and the side is located the second side is kept away from the side and is located the side of the second side and is kept away from the side, and is equipped with the side and is located the second side and is close to the side and is located the side and the side of the side is respectively.

2. A loudspeaker according to claim 1, wherein: the center magnetic circuit includes from first center magnet steel, the center pole core that the lower plate was established in proper order, second center magnet steel and third center magnet steel, the internal fixation portion has a lid form structure, and has the roof, from the roof to the lateral wall that the lower plate direction extends and from the lateral wall bending extension be fixed in diapire on the second center magnet steel top surface, the roof laminating in the top surface of third center magnet steel, the lateral wall laminating in the side of third center magnet steel.

3. A loudspeaker according to claim 1, wherein: the vibration system further comprises a framework fixedly connected with the voice coil and the vibrating diaphragm, the framework comprises a flat plate part, a first extending part and a second extending part, the first extending part is bent and extended from the outer edge of the flat plate part to the lower clamping plate, the second extending part is bent and extended from the inner edge of the flat plate part to the lower clamping plate, the second extending part comprises a first part parallel to the vibrating direction of the vibrating diaphragm and a second part perpendicular to the first part, the voice coil is fixed on the second part and inserted into the magnetic gap, the flat plate part serves as the top of the ball, and the rubber film body is covered on the flat plate part.

4. A loudspeaker according to claim 3, wherein: the vibration system further comprises a flexible supporting piece and an auxiliary vibrating diaphragm, wherein the flexible supporting piece is arranged at intervals with the vibrating diaphragm, the auxiliary vibrating diaphragm is fixed on one side, away from the vibrating diaphragm, of the flexible supporting piece, and the flexible supporting piece is fixed between the basin stand and the first extending part.

5. A loudspeaker according to claim 3, wherein: the periphery of the outward folding ring is fixed on the basin frame, and the basin frame, the rubber film and the framework are integrally formed.

6. A loudspeaker according to claim 1, wherein: the lower clamping plate is provided with an avoidance groove for avoiding the voice coil, the side magnetic circuit comprises side magnetic steel fixed on the lower clamping plate and a side pole core attached to the side magnetic steel, and the side pole core is fixedly held on the basin frame.

7. A loudspeaker according to claim 1, wherein: the loudspeaker further comprises a fixing part for fixedly supporting the sounding monomer, the fixing part comprises a first fixing part and a second fixing part which are clamped between the lower shell and the sounding monomer, and the first fixing part and the second fixing part are in different thicknesses in the direction that the upper shell points to the lower shell.

8. A loudspeaker according to claim 1, wherein: the notch is formed by laser photoresist cleaning.

9. A loudspeaker according to claim 1, wherein: the lower shell is also provided with a leakage hole which is communicated with the rear cavity and the outside.

10. A loudspeaker according to claim 2, wherein: the second center magnetic steel and the third center magnetic steel are integrated magnetic steel.