CN211531286U

CN211531286U - Vibrating diaphragm and sound production device

Info

Publication number: CN211531286U
Application number: CN201922301501.4U
Authority: CN
Inventors: 肖波; 令狐荣林
Original assignee: AAC Technologies Pte Ltd
Current assignee: AAC Technologies Pte Ltd
Priority date: 2019-12-17
Filing date: 2019-12-17
Publication date: 2020-09-18
Anticipated expiration: 2029-12-17

Abstract

The utility model discloses a vibrating diaphragm, be in including intermediate part, encircle the book ring portion that sets up in the intermediate part outside and encircle the setting the fixed part in book ring portion outside, book ring portion is the rectangle structure, book ring portion including being on a parallel with its major axis direction set up two first sides, being on a parallel with its minor axis direction set up two second sides, connect adjacently first side with the turning portion on second side and set up in enhancement layer on the turning portion, the enhancement layer is pasted respectively and is located four the surface on turning portion, and with the turning portion forms compound fillet, the thickness on compound fillet is greater than the thickness on first side reaches the thickness on second side. Compared with the prior art, the utility model discloses a vibrating diaphragm and sound production device have promoted the anti rigidity of swaing of vibrating diaphragm.

Description

Vibrating diaphragm and sound production device

[ technical field ] A method for producing a semiconductor device

The utility model relates to an electroacoustic conversion field especially relates to an apply to vibrating diaphragm and sound production device of portable electronic product.

[ background of the invention ]

With the advent of the mobile internet age, the number of smart mobile devices is increasing. Among the mobile devices, the mobile phone is undoubtedly the most common and portable mobile terminal device. At present, the functions of mobile phones are very diverse, one of them is a high-quality music function, and therefore, a sound generating device for playing sound is widely applied to the current smart mobile devices.

The sound production device in the related art comprises a basin frame, a vibration system and a magnetic circuit system, wherein the vibration system and the magnetic circuit system are respectively fixed on the basin frame; the vibration system comprises a vibrating diaphragm fixed on the basin frame and a voice coil inserted in the magnetic gap to drive the vibrating diaphragm to vibrate and sound. The magnetic circuit system comprises a magnetic yoke connected with the basin frame, main magnetic steel and auxiliary magnetic steel, wherein the main magnetic steel and the auxiliary magnetic steel are fixed on the magnetic yoke, and the main magnetic steel and the auxiliary magnetic steel are arranged at intervals and jointly form the magnetic gap. The vibrating diaphragm comprises a vibrating part in a flat plate structure and a bending ring part, wherein the bending ring part extends from the periphery of the vibrating part and surrounds the vibrating part.

However, in the sound production device in the related art, the thicknesses of all positions of the formed diaphragms are the same, and for part of products, the structural strengths of the diaphragms with the same thickness at different positions are different, so that the requirements of rigidity and the like required by an actual product at a specific position cannot be met, and further, a vibration system swings violently, and the performance of the vibration system is poor.

Therefore, there is a need to provide a new diaphragm and a sound generating device to solve the above-mentioned problems.

[ Utility model ] content

The utility model aims at overcoming above-mentioned technical problem, provide a vibrating diaphragm and sound production device of anti rigidity of swaing.

In order to achieve the above object, the utility model provides a vibrating diaphragm, including the intermediate part, encircle the dog-ear portion that sets up in the intermediate part outside and encircle the fixed part that sets up in the dog-ear portion outside, dog-ear portion is the rectangle structure, dog-ear portion is including being on a parallel with its major axis direction two first sides that set up, being on a parallel with its minor axis direction two second sides that set up, connect adjacently first side with the corner portion on second side and set up in enhancement layer on the corner portion, the enhancement layer is pasted respectively and is located four the surface of corner portion, and with corner portion forms compound fillet, the thickness of compound fillet is greater than the thickness on first side reaches the thickness on second side.

Preferably, the thickness of the compound fillet is equal from the end connected with the first edge to the end connected with the second edge.

Preferably, the thickness of the compound fillet is increased gradually.

Preferably, the thickness of the compound fillet gradually increases or gradually decreases from the end of the compound fillet connecting the first edge to the end of the compound fillet connecting the second edge.

Preferably, the thickness of the compound fillet gradually increases or gradually decreases from the middle of the compound fillet to the two ends of the compound fillet connecting the first edge and the second edge.

Preferably, the thickness of the first side is equal to the thickness of the second side.

Preferably, the composite layer has a stiffness greater than a stiffness of the fillet.

Preferably, the elasticity of the reinforcing layer is greater than that of the corner portion.

Preferably, the vibrating diaphragm further comprises a dome, a through hole penetrating through the middle part is formed in the middle part of the vibrating diaphragm, and the dome is attached to the middle part and completely covers the through hole.

The utility model also provides a sounder, the utility model provides a sounder is still provided, including the basin frame, be fixed in the vibration system and the drive of basin frame respectively the magnetic circuit of vibration system vibration sound production, vibration system includes the utility model provides an above-mentioned vibrating diaphragm.

Compared with the prior art, in the vibrating diaphragm and the sound production device using the vibrating diaphragm, the reinforcing layer is respectively attached to the surfaces of the four corner parts and forms four composite fillets with the corner parts, the rigidity of the reinforcing layer is greater than that of the corner parts, and the elasticity of the reinforcing layer is greater than that of the corner parts; on one hand, the whole weight increase amplitude of the diaphragm is small, and the resonance frequency change is small; on the other hand, the rigidity of the composite fillet is high, so that the vibrating diaphragm is prevented from being broken when vibrating, the structural strength and the anti-swing rigidity of the vibrating diaphragm are improved, the acoustic performance of the vibrating diaphragm and a sound production device using the vibrating diaphragm are effectively improved, the reliability is better, and the effect of controlling the swing of a vibration system is achieved with the minimum sound diaphragm quality cost.

[ description of the drawings ]

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained without inventive work, wherein:

fig. 1 is a schematic perspective view of the sound device of the present invention;

FIG. 2 is an exploded view of the sound device according to the present invention;

fig. 3 is an exploded view of the three-dimensional structure of the diaphragm of the present invention;

fig. 4 is an exploded view of a part of the three-dimensional structure of the diaphragm of the present invention.

[ detailed description ] embodiments

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

Referring to fig. 1-2, the present invention provides a sound generating device 100, which includes a frame 10, a vibration system 20 fixed to the frame 10, and a magnetic circuit system 30 for driving the vibration system 20 to vibrate and generate sound.

Specifically, the vibration system 30 includes a diaphragm 2 and a voice coil 3 for driving the diaphragm 2 to vibrate and generate sound; the magnetic circuit system 30 comprises a magnetic yoke 4 fixed on one side of the basin frame 10 far away from the vibrating diaphragm 2, a main magnetic steel 5 fixedly arranged on the magnetic yoke 4, an auxiliary magnetic steel 6 arranged on the periphery of the main magnetic steel 5 and forming a magnetic gap with the main magnetic steel 5 at intervals, and a pole core 7 covered on the main magnetic steel 5, wherein the voice coil 3 is inserted in the magnetic gap.

Please refer to fig. 3-4, wherein fig. 3 is a schematic three-dimensional structure diagram of the diaphragm of the present invention; fig. 4 is an exploded view of a part of the three-dimensional structure of the diaphragm of the present invention. The diaphragm 2 includes an intermediate portion 21, a folded ring portion 22 disposed around the intermediate portion 21, and a fixing portion 23 disposed around the folded ring portion 22.

Specifically, the middle portion 21 is provided with a through hole 211 penetrating therethrough; the diaphragm 2 further includes a dome 24, and the dome 24 is attached to the middle portion 21 and completely covers the through hole 211.

In the present embodiment, the dome 24 is attached to the intermediate portion 21 to improve the high-frequency acoustic performance of the vibration of the diaphragm 2. It is of course also possible that said dome 3 is omitted.

The bending part 22 is bent and extended from the periphery of the middle part 21 and is disposed around the middle part 21, and is used for providing support and restoring force for the middle part 21 when vibrating, and improving the vibration strength and amplitude of the middle part 21.

Specifically, the cross section of the loop part 22 is arc-shaped, the loop part 22 is rectangular, the loop part 22 includes two first sides 221 arranged parallel to the long axis direction thereof, two second sides 222 arranged parallel to the short axis direction thereof, corner parts 2231 connecting the adjacent first sides 221 and the second sides 222, and reinforcing layers 2232 arranged on the corner parts, the reinforcing layers 2232 are respectively attached to the surfaces of the four corner parts 2231 and form a compound fillet 223 with the corner parts 2231, and the thickness of the compound fillet 223 is greater than the thickness of the first sides 221 and the thickness of the second sides 222.

Preferably, as an alternative embodiment, the thickness of the compound fillet 223 may be increased uniformly, and according to the actual performance of the diaphragm 2 in an application test, the thickness of the reinforcing layer 2232 may be further increased at any weak position, so that the thickness of the compound fillet 223 increases gradually, and the improvement of the sound-emitting effect of the diaphragm by the reinforcing layer 2232 is further improved, as another alternative embodiment, the thickness of the compound fillet 223 gradually increases or decreases from the end thereof connected with the first edge 221 to the end thereof connected with the second edge 222; the thickness of the compound fillet 223 gradually increases or gradually decreases from the middle of the compound fillet 223 to the two ends of the compound fillet 223 connecting the first edge 221 and the second edge 222.

The thickness of the first side 221 and the second side 222 may be the same or different, but are both smaller than the thickness of the compound fillet 223. In this embodiment, the thickness of the first side 221 is equal to the thickness of the second side 222.

In the present embodiment, the reinforcement layers 2232 are respectively attached to the surfaces of the four corner portions 2231, and form the four compound fillets 223 with the corner portions 2231, the rigidity of the reinforcement layers 2232 is greater than that of the corner portions 2231, and the elasticity of the reinforcement layers 2232 is greater than that of the corner portions 2231; on one hand, the whole weight increase amplitude of the diaphragm 2 is small, and the resonance frequency change is small; on the other hand, the rigidity of the compound fillet 223 is larger, so that the vibration diaphragm 2 is prevented from being broken when vibrating, the structural strength and the anti-swing rigidity of the vibration diaphragm 2 are improved, the acoustic performance of the vibration diaphragm 2 and a sound production device using the vibration diaphragm 2 is effectively improved, the reliability is better, and the effect of controlling the swing of the vibration system is achieved with the minimum sound film quality cost.

The above only is the embodiment of the present invention, not limiting the scope of the present invention, all the equivalent structures or equivalent processes of the present invention are used in the specification and the attached drawings, or directly or indirectly applied to other related technical fields, and the same principle is included in the protection scope of the present invention.

Claims

1. A vibrating diaphragm comprises a middle part, a bending ring part and a fixing part, wherein the bending ring part is arranged on the outer side of the middle part in a surrounding mode, the fixing part is arranged on the outer side of the bending ring part in a surrounding mode, the bending ring part is of a rectangular structure and comprises two first sides, two second sides, corner parts and reinforcing layers, the two first sides are arranged in a direction parallel to the long axis direction of the bending ring part, the two second sides are arranged in a direction parallel to the short axis direction of the bending ring part, the corner parts are used for connecting the adjacent first sides and the adjacent second sides, the reinforcing layers are arranged on the corner parts, the reinforcing layers are attached to the surfaces of the four corner parts respectively and form a composite fillet with the corner parts, and the thickness of the.

2. The diaphragm of claim 1, wherein the thickness of the compound fillet is equal from the end connected to the first side to the end connected to the second side.

3. The diaphragm of claim 1, wherein the thickness of the compound fillet increases gradually.

4. The diaphragm of claim 3, wherein the thickness of the compound fillet gradually increases or decreases from the end thereof connected to the first side to the end thereof connected to the second side.

5. The diaphragm of claim 3, wherein the thickness of the compound fillet gradually increases or gradually decreases from the middle of the compound fillet to the two ends of the compound fillet connecting the first edge and the second edge, respectively.

6. The diaphragm of claim 1, wherein the thickness of the first side is equal to the thickness of the second side.

7. The diaphragm of claim 1 wherein the stiffening layer has a stiffness greater than a stiffness of the corner portion.

8. The diaphragm of claim 7 wherein the reinforcement layer has a greater elasticity than the corner portions.

9. The diaphragm of claim 1, further comprising a dome, wherein a through hole penetrating through the middle portion is formed in the middle portion of the diaphragm, and the dome is attached to the middle portion and completely covers the through hole.

10. A sound-producing device comprising a frame, a vibration system fixed to the frame, and a magnetic circuit system for driving the vibration system to vibrate and produce sound, wherein the vibration system comprises a diaphragm according to any one of claims 1 to 9.