WO2022110462A1

WO2022110462A1 - Loudspeaker

Info

Publication number: WO2022110462A1
Application number: PCT/CN2020/140088
Authority: WO
Inventors: 宋威; 张帆; 金鑫
Original assignee: 瑞声声学科技(深圳)有限公司; 瑞声科技(新加坡)有限公司
Priority date: 2020-11-30
Filing date: 2020-12-28
Publication date: 2022-06-02
Also published as: CN213661911U

Abstract

Provided is a loudspeaker, comprising a cone frame, a vibrating system fixed to the cone frame, and a magnetic circuit system driving the vibrating system to vibrate, wherein the magnetic circuit system has a magnetic gap; the vibrating system comprises an upper sound diaphragm, a framework connected to the upper sound diaphragm, and a lower sound diaphragm elastically supporting the framework; the upper sound diaphragm comprises a dome portion, and a corrugated ring portion arranged surrounding the dome portion; the dome portion comprises a body portion, and an avoidance slot formed in such a manner that same is recessed away from two opposite sides of the body portion; an avoidance gap is formed between the avoidance slot and the corrugated ring portion; the framework comprises a main body portion, and a boss formed in such a manner that same extends from the main body portion in the direction approaching the upper sound diaphragm; and the boss is arranged in the avoidance gap. The loudspeaker provided in the present invention is conducive to improving the structural strength for vibrations, so as to reduce the deformation of the framework during a vibration process, and is conducive to improving the symmetry of the vibrating system, so as to reduce vibration swinging.

Description

speaker

technical field

The present invention relates to the field of acoustics and electricity, in particular to a loudspeaker.

Background technique

With the advent of the mobile Internet era, the number of smart mobile devices continues to rise. Among many mobile devices, mobile phones are undoubtedly the most common and portable mobile terminal devices. At present, the functions of mobile phones are extremely diverse, one of which is the high-quality music function. Therefore, speakers for playing sound are widely used in today's smart mobile devices.

Please refer to FIG. 1 , a related art speaker includes a basin frame 201 , a vibration system 202 fixed to the basin frame 201 , and a magnetic circuit system 203 disposed in the basin frame 201 and driving the vibration system 202 to vibrate. The vibration system 202 includes a frame 2021 disposed around the magnetic circuit system 203 and a ball top 2022 connected to the frame 2021 .

However, in such a structure in which the frame 2021 is in direct contact with the ball top 2022, the symmetry between the ball head and the frame is not high, so that the frame 2021 vibrates at different positions of the frame 2021 during the vibration of the speaker. Asynchronous, there is a relative displacement, which easily leads to deformation of the frame 2021, vibration and swing, and affects the acoustic performance of the speaker.

Therefore, it is necessary to provide a loudspeaker that is beneficial to improve the vibration structure, reduce the deformation of the skeleton during the vibration process, improve the symmetry of the vibration system, and reduce the vibration and swing to solve the above problems.

technical problem

In view of the above problems, the purpose of the present invention is to provide a loudspeaker that is conducive to improving the structural strength of vibration, reducing the deformation of the skeleton during vibration, improving the symmetry of the vibration system, and reducing vibration and swing.

technical solutions

In order to solve the above technical problems, embodiments of the present invention provide a loudspeaker, including a basin frame, a vibration system fixed on the basin frame, and a magnetic circuit system for driving the vibration system to vibrate, the magnetic circuit system having a magnetic gap The vibration system includes an upper sound membrane, a skeleton connecting the upper sound membrane, and a lower sound membrane elastically supporting the skeleton, and the upper sound membrane includes a top of the ball and a ring portion arranged around the top of the ball, so The top of the ball comprises a main body part and avoidance grooves recessed from two opposite sides of the main body part, an avoidance gap is formed between the avoidance groove and the folded ring part, and the frame includes a main body part and a recessed groove from the main body part. A boss extending along the direction close to the upper sound membrane, the boss is arranged in the avoidance gap.

Preferably, the body portion comprises two oppositely arranged first side walls and two second side walls connecting the two first side walls, the length of the first side walls is greater than the length of the second side walls, The escape groove is recessed from the two second sidewalls.

Preferably, the body portion includes a rectangular ring-shaped first support portion and a second support portion formed by bending and extending from a periphery of the first support portion, and the boss is formed from the first support portion and the second support portion. The avoidance gap is formed by extending correspondingly, and the body part is in contact with the first support part.

Preferably, the lower sound film includes a conductive sheet and a lower diaphragm that are attached to each other, and along the vibration direction of the vibration system, two ends of the second support portion are respectively connected to the ring portion and the conductive sheet. Abut.

Preferably, the folded ring portion includes a first film body disposed around the top of the ball and a second film body formed by vertically bending and extending from the periphery of the first film body, the first film body extending away from the The pot frame is arched in the direction to form a dome, and the inner wall of the second membrane body is connected to the outside of the pot frame.

Preferably, the vibration system further includes a voice coil that is inserted into the magnetic gap and drives the upper sound membrane to vibrate and emit sound, and the body portion further includes a first support portion bent and extended from the inner side of the first support portion. Three supporting parts, the third supporting part is in contact with the voice coil and is used for supporting the voice coil.

Preferably, the magnetic circuit system includes an upper clamping plate, a lower clamping plate, a main magnetic part and a plurality of auxiliary magnetic parts located between the upper clamping plate and the lower clamping plate, the main magnetic part and a plurality of the auxiliary magnetic parts The auxiliary magnetic parts are fixed on the lower clamping plate, and a plurality of the auxiliary magnetic parts are arranged around the main magnetic part and spaced from the main magnetic part to form the magnetic gap.

Preferably, the magnetic circuit system further comprises a main pole core attached to the main magnetic part and a secondary pole core attached to the secondary magnetic part, the main pole core and the secondary pole core are respectively arranged in The main magnetic part and the auxiliary magnetic part are away from one end of the lower clamping plate.

beneficial effect

Compared with the related art, in the loudspeaker provided by the present invention, by arranging that the top of the ball includes a body portion and recessed grooves formed from two opposite sides of the body portion, the space between the avoidance groove and the ring portion is formed. An avoidance gap is formed, and at the same time, the skeleton is arranged to include a main body portion and a boss extending from the main body portion in a direction close to the upper sound membrane, and the boss is arranged in the avoidance gap, that is, through the setting The "H"-shaped top of the ball maximizes the area of the top of the ball, which is conducive to improving the structural strength of the vibrating object and reducing the deformation of the frame during the vibration process. On the other hand, the The avoidance groove is matched with the characteristic shape of the boss of the skeleton, and the boss can be used as the assembly and positioning feature of the top of the ball to improve the symmetry of the top of the ball and the skeleton, which is beneficial to improve the symmetry of the vibration system. , to reduce vibration and sway.

Description of drawings

In order to illustrate the technical solutions in the embodiments of the present invention more clearly, the following briefly introduces the accompanying drawings used in the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can also be obtained from these drawings without creative effort, among which.

FIG. 1 is a cross-sectional view of a related art speaker.

FIG. 2 is a schematic three-dimensional structure diagram of a speaker provided by the present invention.

FIG. 3 is an exploded schematic diagram of the three-dimensional structure of the speaker provided by the present invention.

FIG. 4 is an exploded schematic diagram of the three-dimensional structure of the top of the ball and the skeleton in the speaker provided by the present invention.

FIG. 5 is a cross-sectional view of the speaker shown in FIG. 2 taken along line C-C.

Embodiments of the present invention

In order to make the objectives, technical solutions and advantages of the present invention clearer, each embodiment of the present invention will be described in detail below with reference to the accompanying drawings. However, those of ordinary skill in the art can appreciate that, in the various embodiments of the present invention, many technical details are set forth for the reader to better understand the present invention. However, even without these technical details and various changes and modifications based on the following embodiments, the technical solutions claimed in the present invention can be realized.

Please refer to FIG. 2 to FIG. 5 , the present invention provides a loudspeaker 100 , the loudspeaker 100 includes a basin frame 10 , and a vibration system 20 fixed to the basin frame 10 is disposed in the basin frame 10 and drives all The magnetic circuit system 30 in which the vibration system 20 vibrates is described. Wherein, the magnetic circuit system 30 has a magnetic gap 101 .

The vibration system 20 includes a skeleton 21 disposed around the magnetic circuit system 30 , an upper sound membrane 22 and a lower sound membrane 23 connected to both ends of the skeleton 21 and inserted into the magnetic gap 101 to drive the upper sound membrane 22 vibrates the voice coil 24 for sound production.

The frame 21 includes a main body portion 211 and a boss 212 extending from the main body portion 211 in a direction close to the upper acoustic membrane 22 .

Specifically, the main body portion 211 includes a rectangular ring-shaped first support portion 2111 , a second support portion 2112 formed by bending and extending from the periphery of the first support portion 2111 , and a second support portion 2112 formed from the first support portion 2111 . The inner side is bent and extended to form the third support portion 2113 .

The upper acoustic membrane 22 includes a ball top 221 and a ring portion 222 surrounding the ball top 221 .

The ball top portion 221 includes a main body portion 2211 and an escape groove 2212 recessed from two opposite sides of the main body portion 2211 . Wherein, an avoidance gap 102 is formed between the avoidance groove 2212 and the folding ring portion 222 . The boss 212 is disposed in the avoidance gap 102 . In this way, the escape groove 2212 of the ball top 221 matches the characteristic shape of the boss 212 of the frame 21 , and the boss 212 can be used as the assembly positioning feature of the ball top 221 to lift the ball top. - Symmetry of the skeleton, which is beneficial to improve the symmetry of the vibration system 20 and reduce vibration and sway.

Specifically, the body portion 2211 includes two oppositely disposed first side walls 2214 and two second side walls 2215 connecting the two first side walls. The length of the first side wall 2214 is greater than the length of the second side wall 2215 , and the escape groove 2212 is recessed from the two second side walls 2215 . Of course, this is not a limitation of the present invention, and in other embodiments, the escape grooves 2212 may also be disposed on the two first side walls 2215 . By setting the avoidance groove 2212, the area of the top of the ball is maximized, which is beneficial to improve the structural strength of the vibrating object and reduce the deformation of the frame during the vibration process.

The folded ring portion 222 includes a first film body 2221 disposed around the ball top 221 and a second film body 2222 formed by vertically bending and extending from the periphery of the first film body 2221 . The first membrane body 2221 is arched away from the basin frame 10 to form the dome 103 , and the inner wall of the second membrane body 2222 is connected to the outside of the basin frame 10 .

Specifically, the boss 212 extends from the first support portion 2111 corresponding to the avoidance gap 102 , the body portion 2211 abuts against the first support portion 2111 , and the third support portion 2113 It is in contact with the voice coil 24 and is used to support the voice coil 24 .

The lower sound membrane 23 includes a conductive sheet 231 and a lower vibration membrane 232 which are attached to each other. Along the vibration direction of the vibration system 20 , both ends of the second support portion 2112 are respectively abutted against the ring portion 222 and the conductive sheet 231 .

The conductive sheet 231 is connected to the voice coil 24 by wires, and is used for connecting an external power supply device to supply power to the voice coil 24 .

The magnetic circuit system 30 includes an upper clamping plate 31, a lower clamping plate 32, a main magnetic part 33 and a plurality of auxiliary magnetic parts 34 located between the upper clamping plate 31 and the lower clamping plate 32, which are attached to the main magnetic part. The main pole core 35 of 33 and the auxiliary pole core 36 attached to the auxiliary magnetic part 34 . Wherein, the main magnetic part 33 and a plurality of the auxiliary magnetic parts 34 are fixed on the lower clamping plate 32 , and a plurality of the auxiliary magnetic parts 34 are arranged around the main magnetic part 33 and are connected with the main magnetic part 33 are arranged at intervals to form the magnetic gap 101 .

Specifically, the main pole core 35 and the secondary pole core 36 are respectively disposed at one end of the main magnetic part 33 and the auxiliary magnetic part 34 away from the lower clamping plate 31 .

In the loudspeaker provided by the present invention, by arranging that the ball top includes a body portion and avoidance grooves recessed from two opposite sides of the body portion, an avoidance gap is formed between the avoidance groove and the folded ring portion, and at the same time, Setting the frame includes a main body and a boss extending from the main body in a direction close to the upper sound membrane. The boss is arranged in the avoidance gap, that is, by arranging the "H"-shaped alley. The top of the ball can maximize the area of the top of the ball, which is beneficial to improve the structural strength of the vibrating object and reduce the deformation of the frame during the vibration process. The bosses of the skeleton have matching features and shapes, and the bosses can be used as assembling and positioning features of the ball top to improve the spherical top-skeleton symmetry, which is beneficial to improve the symmetry of the vibration system and reduce vibration and sway.

Those of ordinary skill in the art can understand that the above-mentioned embodiments are specific embodiments for realizing the present invention, and in practical applications, various changes can be made in form and details without departing from the spirit and the spirit of the present invention. scope.

Claims

A loudspeaker includes a basin frame, a vibration system fixed on the basin frame, and a magnetic circuit system for driving the vibration system to vibrate, the magnetic circuit system having a magnetic gap, the vibration system comprising an upper sound membrane, a connecting The skeleton of the upper sound membrane and the lower sound membrane elastically supporting the skeleton are characterized in that the upper sound membrane includes a dome top and a ring part arranged around the dome top, and the dome top includes a body part and a self-contained part. Two opposite sides of the body part are recessed to form avoidance grooves, and an avoidance gap is formed between the avoidance groove and the folding ring part, and the frame includes a main body part and a direction from the main body part close to the upper sound membrane The boss is formed by extension, and the boss is arranged in the avoidance gap.
The loudspeaker according to claim 1, wherein the main body comprises two oppositely arranged first side walls and two second side walls connecting the two first side walls, and the length of the first side walls is Greater than the length of the second sidewalls, the escape groove is formed from two of the second sidewalls concavely.
The loudspeaker according to claim 2, wherein the main body portion comprises a rectangular ring-shaped first support portion and a second support portion formed by bending and extending from a peripheral edge of the first support portion, the convex The stage is formed to extend from the first support portion corresponding to the avoidance gap, and the body portion is in abutment with the first support portion.
The loudspeaker according to claim 3, wherein the lower sound membrane comprises a conductive sheet and a lower vibration membrane that are attached to each other, and along the vibration direction of the vibration system, two ends of the second support portion are respectively connected to The folded ring portion and the conductive sheet are in abutment.
The loudspeaker according to claim 4, wherein the ring portion comprises a first membrane body disposed around the top of the ball and a second membrane body formed by vertically bending and extending from the periphery of the first membrane body , the first membrane body is arched away from the basin frame to form a dome, and the inner wall of the second membrane body is connected to the outside of the basin frame.
The loudspeaker according to claim 3, wherein the vibration system further comprises a voice coil inserted into the magnetic gap and driving the upper sound membrane to vibrate and produce sound, and the main body part further comprises a self-supporting part from the first support. The inner side of the part is bent and extended to form a third support part, the third support part is in contact with the voice coil and is used for supporting the voice coil.
The loudspeaker according to claim 6, wherein the magnetic circuit system comprises an upper clamping plate, a lower clamping plate, a main magnetic part and a plurality of auxiliary magnetic parts located between the upper clamping plate and the lower clamping plate, the The main magnetic part and a plurality of the auxiliary magnetic parts are fixed on the lower clamping plate, and the plurality of auxiliary magnetic parts are arranged around the main magnetic part and spaced from the main magnetic part to form the magnetic gap.
The loudspeaker according to claim 7, wherein the magnetic circuit system further comprises a main pole core attached to the main magnetic part and a secondary pole core attached to the auxiliary magnetic part, the main pole core The core and the secondary pole core are respectively disposed at one end of the main magnetic part and the secondary magnetic part away from the lower clamping plate.