CN212909891U

CN212909891U - Miniature loudspeaker

Info

Publication number: CN212909891U
Application number: CN202021693040.6U
Authority: CN
Inventors: 王猛; 董海建
Original assignee: Shenzhen Sunway Acoustics Technology Co Ltd
Current assignee: Shenzhen Sunway Acoustics Technology Co Ltd
Priority date: 2020-08-13
Filing date: 2020-08-13
Publication date: 2021-04-06
Anticipated expiration: 2030-08-13

Abstract

The utility model discloses a micro loudspeaker, including basin frame, protecgulum and vibrating diaphragm, the vibrating diaphragm includes consecutive interior fixed part from inside to outside, ring folding portion and outer fixed part, and the both sides of outer fixed part bond with basin frame and vibrating diaphragm respectively, is equipped with the first concave-convex structure that the cross-section is wavy on the protecgulum, is equipped with the second concave-convex structure that the cross-section is wavy on the basin frame, and at least some centre gripping of outer fixed part is between first concave-convex structure of matched with and second concave-convex structure, and the cross-section of outer fixed part centre gripping in the region between first concave-convex structure and the second concave-convex structure is wavy. The miniature loudspeaker realizes the improvement of the waterproof effect of the miniature loudspeaker on the premise of not reducing the acoustic performance of the miniature loudspeaker, and achieves the purpose of deep waterproof of the miniature loudspeaker; simultaneously, can also avoid miniature speaker because of the bad gas leakage risk that leads to of vibrating diaphragm bonding, do benefit to the job stabilization nature who guarantees miniature speaker.

Description

Miniature loudspeaker

Technical Field

The utility model relates to an electroacoustic transducer technical field especially relates to a miniature speaker.

Background

At present, most of loudspeakers and receivers used by mobile terminals are moving-coil loudspeakers. The moving-coil speaker includes: the magnetic circuit component, the vibration component and the basin frame for accommodating and fixing the magnetic circuit component and the vibration component. The vibration component comprises a vibrating diaphragm, a ball top and a voice coil; the magnetic circuit component comprises a washer, magnetic steel and a yoke which are combined in sequence.

The development trend of the current micro loudspeaker and the current receiver is high sensitivity and large amplitude, and has higher requirements on waterproof performance, and the waterproof structure of the traditional micro loudspeaker needs the width of the glue coating of the vibrating diaphragm and the basin frame to be wide enough (about more than 0.70 mm) so as to ensure that the bonding width of the vibrating diaphragm and the basin frame can achieve the waterproof effect. And the single-side width of the frame is too wide, which can increase the volume of the micro-speaker or prevent the improvement of the acoustic performance of the micro-speaker.

SUMMERY OF THE UTILITY MODEL

The utility model discloses the technical problem that will solve is: provides a high-performance micro-speaker with good waterproof effect.

In order to solve the technical problem, the utility model discloses a technical scheme be: the utility model provides a micro loudspeaker, includes basin frame, protecgulum and vibrating diaphragm, the vibrating diaphragm includes consecutive interior fixed part, book ring portion and outer fixed part from inside to outside, the both sides of outer fixed part respectively with the basin frame reaches the vibrating diaphragm bonds, be equipped with the first concave-convex structure that the cross-section is wavy on the protecgulum, be equipped with the second concave-convex structure that the cross-section is wavy on the basin frame, at least some centre gripping of outer fixed part is between first concave-convex structure of matched with and second concave-convex structure, outer fixed part centre gripping in the cross-section in the region between first concave-convex structure and the second concave-convex structure is wavy.

Furthermore, the area of the outer fixing portion clamped between the first concave-convex structure and the second concave-convex structure is respectively bonded with the first concave-convex structure and the second concave-convex structure.

Further, the first concave-convex structure is annular as a whole, and the second concave-convex structure is annular as a whole.

Further, roll over ring portion including keeping away from the convex first book ring of protecgulum direction and being close to towards the convex second of protecgulum direction rolls over the ring, the second is rolled over around first book ring sets up and with first book ring links to each other, it is right to be equipped with on the protecgulum the second is rolled over the ring and is kept away the dead slot of keeping away of position.

Further, the front cover is annular, and the clearance groove is located at the bottom of the inner wall surface of the front cover.

Furthermore, the wall surface of the clearance groove is an arc surface.

Further, the first concave-convex structure is arranged close to the cambered surface.

Furthermore, the pot frame further comprises a magnetic circuit component, and the magnetic circuit component is fixed on the pot frame.

Furthermore, the voice coil is connected with the inner fixing part.

The beneficial effects of the utility model reside in that: the width of the combined surface of the vibrating diaphragm and the frame is increased under the condition that the unilateral width of the frame is not increased, the waterproof effect of the micro loudspeaker is improved on the premise that the acoustic performance of the micro loudspeaker is not reduced, and the purpose of deep waterproof of the micro loudspeaker is achieved; simultaneously, can also avoid miniature speaker because of the bad gas leakage risk that leads to of vibrating diaphragm bonding, do benefit to the job stabilization nature who guarantees miniature speaker.

Drawings

Fig. 1 is a cross-sectional view of a micro-speaker according to a first embodiment of the present invention;

FIG. 2 is an enlarged view of detail A in FIG. 1;

fig. 3 is a schematic structural view of a frame in a micro speaker according to a first embodiment of the present invention;

fig. 4 is a schematic structural diagram of a front cover in a micro-speaker according to a first embodiment of the present invention.

Description of reference numerals:

1. a basin stand; 11. a second relief structure;

2. a front cover; 21. a first relief structure; 22. an empty avoiding groove; 23. a cambered surface;

3. vibrating diaphragm; 31. an inner fixing portion; 32. a folded ring part; 321. a first fold ring; 322. a second fold ring; 33. an outer fixing portion;

4. a voice coil;

5. a magnetic circuit assembly; 51. a magnetic gap.

Detailed Description

In order to explain the technical content, the objects and the effects of the present invention in detail, the following description is made with reference to the accompanying drawings in combination with the embodiments.

Referring to fig. 1 to 4, a micro speaker includes a frame 1, a front cover 2 and a diaphragm 3, the diaphragm 3 includes an inner fixing portion 31, a corrugated portion 32 and an outer fixing portion 33 sequentially connected from inside to outside, two sides of the outer fixing portion 33 are respectively bonded to the frame 1 and the diaphragm 3, the front cover 2 is provided with a first concave-convex structure 21 having a wavy cross section, the frame 1 is provided with a second concave-convex structure 11 having a wavy cross section, at least a part of the outer fixing portion 33 is clamped between the first concave-convex structure 21 and the second concave-convex structure 11, and the outer fixing portion 33 is clamped between the first concave-convex structure 21 and the second concave-convex structure 11.

From the above description, the beneficial effects of the present invention are: the width of the combined surface of the vibrating diaphragm 3 and the frame 1 is increased under the condition that the single-side width of the frame 1 is not increased, the waterproof effect of the micro loudspeaker is improved on the premise that the acoustic performance of the micro loudspeaker is not reduced, and the purpose of deep waterproof of the micro loudspeaker is achieved; simultaneously, can also avoid miniature speaker because of the bad gas leakage risk that leads to of 3 bonds of vibrating diaphragm, do benefit to the job stabilization nature who guarantees miniature speaker.

Further, the region where the outer fixing portion 33 is sandwiched between the first concave-convex structure 21 and the second concave-convex structure 11 is bonded to the first concave-convex structure 21 and the second concave-convex structure 11, respectively.

As can be seen from the above description, the wavy region of the outer fixing portion 33 can be formed by injection molding, or by extrusion molding with the first and second concave-convex structures, and during the extrusion molding, the front cover 2 and the basin frame 1 need to be subjected to pressure maintaining operation to form the wavy region on the outer fixing portion 33.

Further, the first concave-convex structure 21 is annular as a whole, and the second concave-convex structure 11 is annular as a whole.

Further, the ring folding portion 32 includes a first folding ring 321 protruding towards a direction away from the front cover 2 and a second folding ring 322 protruding towards a direction close to the front cover 2, the second folding ring 322 surrounds the first folding ring 321 and is connected to the first folding ring 321, and the front cover 2 is provided with a clearance groove 22 for avoiding the second folding ring 322.

As is apparent from the above description, the corrugated rim portion 32 can be deformed by a large amount, so that the micro-speaker can realize vibration of a larger amplitude, thereby further improving the acoustic performance of the micro-speaker. The arrangement of the clearance groove 22 can prevent the folded ring part 32 from interfering with the front cover 2 in the deformation process, and is favorable for ensuring the working stability of the micro-speaker.

Further, the front cover 2 is annular, and the clearance groove 22 is located at the bottom of the inner wall surface of the front cover 2.

Further, the wall surface of the clearance groove 22 is an arc surface 23.

As can be seen from the above description, the wall surface of the clearance groove 22 is the arc surface 23, which can effectively improve the stress concentration of the front cover 2, thereby improving the structural strength of the front cover 2, further ensuring the structural stability of the micro-speaker, and making the micro-speaker durable.

Further, the first concave-convex structure 21 is disposed near the arc surface 23.

Further, the magnetic basin comprises a magnetic circuit component 5, wherein the magnetic circuit component 5 is fixed on the basin frame 1.

Further, a voice coil 4 connected to the inner fixing portion 31 is further included.

Example one

Referring to fig. 1 to 4, a first embodiment of the present invention is: referring to fig. 1 and 2, a micro-speaker includes a frame 1, a front cover 2, a diaphragm 3, a voice coil 4 and a magnetic circuit assembly 5, the magnetic circuit assembly 5 is fixed on the frame 1, the magnetic circuit assembly 5 is provided with a magnetic gap 51 for accommodating the voice coil 4, the diaphragm 3 comprises an inner fixing portion 31, a corrugated portion 32 and an outer fixing portion 33 which are connected in sequence from inside to outside, the inner fixing part 31 is connected with the voice coil 4, two sides of the outer fixing part 33 are respectively bonded with the frame 1 and the diaphragm 3, the front cover 2 is provided with a first concave-convex structure 21 with a wavy cross section, the basin frame 1 is provided with a second concave-convex structure 11 with a wavy cross section, at least a portion of the outer fixing portion 33 is clamped between the first concave-convex structure 21 and the second concave-convex structure 11, the cross section of the region where the outer fixing portion 33 is sandwiched between the first concave-convex structure 21 and the second concave-convex structure 11 is wavy.

The region where the outer fixing portion 33 is sandwiched between the first concave-convex structure 21 and the second concave-convex structure 11 is bonded to the first concave-convex structure 21 and the second concave-convex structure 11, respectively.

Specifically, as shown in fig. 4, the first concave-convex structure 21 is annular as a whole; as shown in fig. 3, the second concave-convex structure 11 is annular as a whole.

As shown in fig. 2 and 4, optionally, the ring folding portion 32 includes a first folding ring 321 protruding in a direction away from the front cover 2 and a second folding ring 322 protruding in a direction close to the front cover 2, the second folding ring 322 is disposed around the first folding ring 321 and connected to the first folding ring 321, the first folding ring 321 is connected to the inner fixing portion 31, the second folding ring 322 is connected to the outer fixing portion 33, a width of an opening of the first folding ring 321 is greater than a width of an opening of the second folding ring 322, a protruding height of the first folding ring 321 is greater than a protruding height of the second folding ring 322, and the front cover 2 is provided with a clearance groove 22 for avoiding the second folding ring 322.

In this embodiment, the front cover 2 is annular, and the clearance groove 22 is located at the bottom of the inner wall surface of the front cover 2. Preferably, the wall surface of the clearance groove 22 is an arc surface 23, and the first concave-convex structure 21 is disposed near the arc surface 23.

To sum up, the micro speaker provided by the utility model increases the width of the bonding surface of the vibrating diaphragm and the frame without increasing the single-side width of the frame, and realizes the improvement of the waterproof effect of the micro speaker without reducing the acoustic performance of the micro speaker, thereby achieving the purpose of deep waterproof of the micro speaker; meanwhile, the air leakage risk of the micro loudspeaker caused by poor bonding of the vibrating diaphragm can be avoided, and the working stability of the micro loudspeaker is favorably ensured; the structure stability is good, and the service life is long.

The above mentioned is only the embodiment of the present invention, and not the limitation of the patent scope of the present invention, all the equivalent transformations made by the contents of the specification and the drawings, or the direct or indirect application in the related technical field, are included in the patent protection scope of the present invention.

Claims

1. The utility model provides a micro loudspeaker, includes basin frame, protecgulum and vibrating diaphragm, the vibrating diaphragm includes interior fixed part, book ring portion and the outer fixed part that links to each other in proper order from inside to outside, the both sides of outer fixed part respectively with the basin frame reaches the vibrating diaphragm bonds its characterized in that: be equipped with on the protecgulum that the cross-section is wavy first concave-convex structure, be equipped with the second concave-convex structure that the cross-section is wavy on the basin frame, at least partly centre gripping of outer fixed part is between first concave-convex structure of matched with and second concave-convex structure, outer fixed part centre gripping in the cross-section in the region between first concave-convex structure and the second concave-convex structure is wavy.

2. The micro-speaker of claim 1, wherein: the outer fixing portion is clamped between the first concave-convex structure and the second concave-convex structure, and the area of the outer fixing portion is bonded with the first concave-convex structure and the second concave-convex structure respectively.

3. The micro-speaker of claim 1, wherein: the first concave-convex structure is annular as a whole, and the second concave-convex structure is annular as a whole.

4. The micro-speaker of claim 1, wherein: roll over ring portion and include towards keeping away from the convex first book ring of protecgulum orientation and towards being close to the convex second of protecgulum orientation rolls over the ring, the second is rolled over the ring and is surrounded first book ring sets up and with first book ring links to each other, it is right to be equipped with on the protecgulum be used for the second is rolled over the ring and is kept away the dead slot of keeping away of position.

5. The micro-speaker of claim 4, wherein: the front cover is annular, and the clearance groove is located at the bottom of the inner wall surface of the front cover.

6. The micro-speaker of claim 4, wherein: the wall surface of the clearance groove is a cambered surface.

7. The micro-speaker of claim 6, wherein: the first concave-convex structure is arranged close to the cambered surface.

8. The micro-speaker of claim 1, wherein: the magnetic circuit component is fixed on the basin frame.

9. The micro-speaker of claim 1, wherein: and the voice coil is connected with the inner fixing part.