CN112770242B

CN112770242B - Loudspeaker

Info

Publication number: CN112770242B
Application number: CN202011563718.3A
Authority: CN
Inventors: 宋威; 肖波; 令狐荣林; 孔晨亮; 章统
Original assignee: AAC Microtech Changzhou Co Ltd; Science and Education City Branch of AAC New Energy Development Changzhou Co Ltd
Current assignee: AAC Microtech Changzhou Co Ltd; Science and Education City Branch of AAC New Energy Development Changzhou Co Ltd
Priority date: 2020-12-25
Filing date: 2020-12-25
Publication date: 2022-03-01
Anticipated expiration: 2040-12-25
Also published as: CN112770242A

Abstract

The invention provides a loudspeaker. The loudspeaker includes basin frame, vibration system and magnetic circuit, magnetic circuit has the magnetic gap, vibration system is including encircleing magnetic circuit sets up lower skeleton and connect in the last sound membrane and the under bracing portion at skeleton upper and lower both ends down, the under bracing portion includes current conducting plate and lower vibrating diaphragm, the current conducting plate includes support arm, pad and connection the support arm with the elasticity arm of force of pad, the outer peripheral edge rigid coupling of lower vibrating diaphragm in the support arm, the internal peripheral edge rigid coupling of lower vibrating diaphragm in lower skeleton, down the skeleton include with the first connecting surface of lower vibrating diaphragm internal peripheral edge rigid coupling, the skeleton corresponds the position of pad is equipped with accepts the portion of dodging of pad, dodge the portion certainly first connecting surface is to being close to the sunken formation of the direction of going up the sound membrane. The loudspeaker provided by the invention has the advantages that the bonding pad of the conductive plate can be normally placed, and the lower vibrating diaphragm cannot be damaged.

Description

Loudspeaker

Technical Field

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

Background

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 a mobile phone are very diverse, one of which is a high-quality music function, and thus, a speaker for playing sound is widely applied to the current smart mobile devices.

The loudspeaker in the related art comprises a basin frame, a vibration system fixed on the basin frame, and a magnetic circuit system arranged in the basin frame and driving the vibration system to vibrate, wherein the magnetic circuit system is provided with a magnetic gap. The vibration system comprises a vibrating diaphragm, a voice coil for driving the vibrating diaphragm and a supporting system for supporting the voice coil. With further reference to fig. 8, the support system includes a bobbin 24 supporting the voice coil 22, a lower diaphragm 2122 'connected to the bobbin 24, and a pad 2121 connected to the lower diaphragm 2122' for providing an external power supply to the voice coil 22. The frame 24 is provided with a connecting surface 241 'for fixing the lower diaphragm 2122'. The lower diaphragm 2122 'is provided with an avoiding hole groove 2411'. The pad 2121 is provided with a pad trace 21212 ' passing through the escape hole groove 2411 ' of the lower diaphragm 2122 '. In the related art, the bonding surfaces of the pad 2121 and the inner periphery of the lower diaphragm 2122 ' are located on the connection surface 241 ' at the same height, so that the lower diaphragm 2122 ' is provided with an avoiding hole 2411 ' to match the pad trace 21212 '. Such a structure destroys the integrity of the lower diaphragm 2122', reducing the anti-sway capability of the speaker.

Therefore, there is a need to provide a new speaker to solve the above problems.

Disclosure of Invention

The invention provides a loudspeaker which can not only place a bonding pad normally but also cannot damage a lower vibrating diaphragm.

The invention provides a loudspeaker, which comprises a basin frame, a vibration system fixed on the basin frame and a magnetic circuit system arranged in the basin frame and driving the vibration system to vibrate, wherein the magnetic circuit system is provided with a magnetic gap, the vibration system comprises a lower framework arranged around the magnetic circuit system, an upper sound film and a lower supporting part connected with two ends of the lower framework, the upper sound film and the lower supporting part are both fixed on the basin frame, the lower supporting part is arranged around the magnetic circuit system, the lower supporting part comprises a current conducting plate fixed on one side of the lower framework far away from the upper sound film and a lower vibrating diaphragm fixed on one side of the current conducting plate far away from the lower framework, the current conducting plate comprises a supporting arm fixedly connected with the basin frame, a bonding pad fixed on the lower framework and an elastic arm connecting the supporting arm and the bonding pad, and the outer periphery of the lower vibrating diaphragm is fixedly connected with the supporting arm, the internal peripheral rigid coupling of lower vibrating diaphragm in lower skeleton, down the skeleton include with the first connection face of the internal peripheral rigid coupling of lower vibrating diaphragm, the skeleton corresponds down the position of pad is equipped with accepts the portion of dodging of pad, dodge the portion certainly first connection face is to being close to go up the sunken formation of sound membrane's direction.

Preferably, the recess depth of the relief portion is greater than or equal to the thickness of the pad.

Preferably, the shape of the avoiding part is matched with that of the bonding pad, and the avoiding part corresponds to the number of the bonding pads one to one.

Preferably, the vibration system further includes a voice coil inserted into the magnetic gap and driving the upper diaphragm to vibrate and generate sound, the voice coil includes a first side portion disposed opposite to the first side portion, a second side portion disposed opposite to the second side portion, and a corner portion connecting the first side portion and the second side portion, and the avoiding portion is correspondingly disposed at the corner portion.

Preferably, the vibration system further comprises a voice coil inserted into the magnetic gap and driving the upper voice diaphragm to vibrate and sound; the first connecting surface is annular and is arranged around the magnetic circuit system, the lower framework further comprises a plurality of fixing pins which are formed by extending from the inner periphery of the first connecting surface to the direction close to the upper sound film, and the plurality of fixing pins are fixedly connected with one end of the voice coil close to the upper sound film respectively.

Preferably, the voice coil loudspeaker voice coil is fillet rectangle structure, fixed foot includes four, four fixed foot is fixed in respectively the fillet department of voice coil loudspeaker voice coil.

Preferably, the lower frame further includes a third connection surface extending from an outer peripheral edge of the first connection surface toward a direction close to the upper sound diaphragm, and a second connection surface extending from a distal end of the third connection surface toward a direction away from the magnetic circuit system; the upper sound film comprises a first film body arranged around the magnetic circuit system, a second film body arranged around the first film body and fixedly connected with the basin frame, and a dome connected with the first film body and the second film body, and the second connecting surface is connected below the dome.

Preferably, the vibration system further includes an upper frame at least partially covering the magnetic circuit system, and a periphery of the first mold body on a side close to the magnetic circuit system is connected to the upper frame.

Preferably, the magnetic circuit system comprises an upper clamp plate, a lower clamp plate, and a main magnetic portion and a plurality of auxiliary magnetic portions which are located between the upper clamp plate and the lower clamp plate, the main magnetic portion and the plurality of auxiliary magnetic portions are fixedly arranged on the lower clamp plate, the plurality of auxiliary magnetic portions surround the main magnetic portion and are arranged at intervals with the main magnetic portion to form the magnetic gap, the upper clamp plate is covered on the main magnetic portion, and the upper framework cover is arranged on one side of the upper clamp plate, which is far away from the main magnetic portion.

Preferably, the upper clamping plate includes a first portion covering the main magnetic portion, a second portion extending from the periphery of the first portion to the position close to the lower clamping plate in a bent manner and surrounding the main magnetic portion, and a third portion extending from the second portion to the position far from the main magnetic portion and covering the auxiliary magnetic portion; the second portion is provided with an opening penetrating through the second portion, and the fixing pin is fixedly connected to the voice coil through the opening.

Compared with the prior art, the loudspeaker provided by the invention has the advantages that the avoiding part is arranged on the lower framework, and the bonding pad is accommodated in the avoiding part, so that the problem that an avoiding hole groove is formed in the lower vibrating diaphragm to match with the wiring of the current conducting plate is solved, the integrity of the lower vibrating diaphragm is ensured, and the anti-swing capacity of the loudspeaker is improved.

Drawings

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

fig. 1 is a schematic structural diagram of a main body of a speaker provided by the present invention;

FIG. 2 is an exploded view of the loudspeaker of FIG. 1;

FIG. 3 is a schematic view of the assembly structure of the lower diaphragm, the conductive plate, the lower frame and the voice coil;

FIG. 4 is a schematic structural view of the lower frame;

FIG. 5 is a schematic structural view of the upper splint;

FIG. 6 is a schematic cross-sectional view taken along line A-A of FIG. 1;

FIG. 7 is a schematic cross-sectional view taken along line B-B of FIG. 1;

fig. 8 is a schematic structural view of a related art in which an avoiding hole groove is formed in a lower diaphragm.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1 to 7, fig. 1 is a schematic structural diagram of a speaker according to the present invention, and fig. 2 is an exploded schematic structural diagram of the speaker shown in fig. 1; FIG. 3 is a schematic view of the assembly structure of the lower diaphragm, the conductive plate, the lower frame and the voice coil; FIG. 4 is a schematic structural view of the lower frame; FIG. 5 is a schematic structural view of the upper splint; FIG. 6 is a schematic cross-sectional view taken along line A-A of FIG. 1; fig. 7 is a schematic sectional view taken along line B-B in fig. 1. The invention provides a loudspeaker 100, which comprises a basin frame 1, a vibration system 2 fixed on the basin frame 1 and a magnetic circuit system 3 arranged in the basin frame 1 and driving the vibration system 2 to vibrate, wherein the magnetic circuit system 3 is provided with a magnetic gap 3C.

The vibration system 2 includes an upper diaphragm 211 and a lower support 212 arranged at an interval, a voice coil 22 inserted into the magnetic gap 3C and driving the upper diaphragm 211 to vibrate and generate sound, an upper bobbin 23, and a lower bobbin 24 arranged around the magnetic circuit system 3. The upper sound film 211 and the lower support part 212 are fixed on the frame 1.

The upper sound membrane 211 comprises a first membrane 2111 arranged around the magnetic circuit system 3, a second membrane 2112 arranged around the first membrane 2111 and fixedly connected with the frame 1, and a dome 2113 connecting the first membrane 2111 and the second membrane 2112, wherein the periphery of the first membrane 2111 close to one side of the magnetic circuit system 3 is enclosed to form a cut-in hole 21111, the upper framework 23 is positioned in the cut-in hole 21111, and the periphery of the first membrane 2111 close to one side of the magnetic circuit system 3 is connected to the outer side of the upper framework 23. Wherein, the upper framework 23 at least partially covers the magnetic circuit system 3.

The lower frame 24 includes the first connecting surface 241 annularly surrounding the magnetic circuit system 3, a third connecting surface 243 extending from the outer periphery of the first connecting surface 241 toward the upper sound diaphragm 211, a second connecting surface 242 extending from the end of the third connecting surface 243 toward the direction away from the magnetic circuit system 3, and a plurality of fixing legs 244 extending from the inner periphery of the first connecting surface 241 toward the upper sound diaphragm 211.

The upper sound film 211 and the lower support portion 212 are connected to the upper and lower ends of the lower frame 24, respectively. Specifically, the first connection surface 241 and the second connection surface 242 are parallel and spaced from each other, the second connection surface 242 is connected below the ball top 2113, and the first connection surface 241 is connected above the lower support portion 212. The fixing pins 244 are respectively fixed to one end of the voice coil 22 close to the upper diaphragm 211. As shown in fig. 3, the voice coil 22 has a round rectangular structure, and four fixing legs 244 are provided, and four fixing legs are fixed at the round corners of the voice coil 22 in a one-to-one correspondence.

More specifically, the lower support portion 212 is disposed around the magnetic circuit system 3. The lower support portion 212 includes a conductive plate 2121 fixed to a side of the lower frame 212 far from the upper diaphragm 211, and a lower diaphragm 2122 fixed to a side of the conductive plate 2121 far from the lower frame 212. The conductive plate 2121 comprises a supporting arm 21211 fixedly connected to the basin frame 1, a pad 21212 fixed to the lower frame 24, and a resilient arm 21213 connecting the supporting arm 21211 and the pad 21212. The outer periphery of the lower vibrating diaphragm 2122 is fixedly connected to the supporting arm 21211, and the inner periphery of the lower vibrating diaphragm 2122 is fixedly connected to the lower portion of the first connecting surface 241. In this embodiment, a fixing plate 2123 is further fixedly disposed on a side of the lower diaphragm 2122 away from the lower frame 212.

Preferably, the lower frame 24 is provided with a relief portion 2411 for accommodating the pad 21212 at a position corresponding to the pad 21212, and the relief portion 2411 is formed to be recessed from the first connection surface 241 in a direction approaching the upper sound film 211. Preferably, the depth of the recess of the avoiding portion 2411 is greater than or equal to the thickness of the pad 21212, the shape of the avoiding portion 2411 is matched with the shape of the pad 21212, and the number of the avoiding portions 2411 and the number of the pads 21212 are in one-to-one correspondence.

The voice coil 22 includes a first side portion 22A disposed opposite to each other, a second side portion 22B disposed opposite to each other, a corner portion 22C (that is, four corner portions 22C are disposed) connecting the first side portion 22A and the second side portion 22B adjacent to each other, and a voice coil wire 221, the avoiding portion 2411 is correspondingly disposed at the corner portion 22C, and the voice coil wire 221 and the pad 21212 are spot-welded.

The magnetic circuit system 3 comprises an upper clamping plate 31, a lower clamping plate 32, and a main magnetic part 33 and a plurality of auxiliary magnetic parts 34 which are positioned between the upper clamping plate 31 and the lower clamping plate 32, wherein the main magnetic part 33 and the plurality of auxiliary magnetic parts 34 are fixedly arranged on the lower clamping plate 32. The plurality of sub magnetic portions 34 are disposed around the main magnetic portion 33 and spaced apart from the main magnetic portion 33 to form the magnetic gap 3C.

The lower end of the upper clamp plate 31 is fixedly arranged on the main magnetic part 33 and the auxiliary magnetic part 34, and the upper framework 23 is arranged on one side of the upper clamp plate 31 far away from the main magnetic part 33 in a covering manner.

The upper clamp 31 includes a first portion 311 covering the main magnetic portion 33, a second portion 313 bent and extended from the periphery of the first portion 311 to be close to the lower clamp 32 and surrounding the main magnetic portion 33, and a third portion 315 extended from the second portion 313 to be far from the main magnetic portion 33 and covering the auxiliary magnetic portion 34; the second portion 313 has an opening 317 formed therethrough, and the fixing leg 244 is fixed to the voice coil 22 through the opening 317.

In this embodiment, four of the sub-magnetic portions 34 are provided, namely, two first sub-magnets 341 spaced apart along the short axis side of the main magnetic portion 33 and two second sub-magnets 342 spaced apart along the long axis side of the main magnetic portion 33, and in other embodiments, a plurality of the sub-magnetic portions 34 may be replaced with sub-magnetic portions having a ring-shaped configuration.

The main magnetic portion 33 includes a first magnet 331 and a second magnet 333 disposed at an interval, and a main pole core 332 interposed between the first magnet 331 and the second magnet 333.

The upper clamping plate 31, the lower clamping plate 32, the main magnetic part 33 and the auxiliary magnetic part 34 are all made of magnetic conductive materials. The magnetic flux in the magnetic gap 3C can be effectively increased by the magnetic conduction action of the upper plate 31, the lower plate 32, the main magnetic portion 33, and the sub magnetic portion 34, and thus the sensitivity of the speaker 100 can be improved. In this embodiment, the first magnet 331, the second magnet 332, the first sub-magnet 341, and the second sub-magnet 342 are all magnetic steel. It is to be understood that the first magnet 331, the second magnet 332, the first sub-magnet 341, and the second sub-magnet 342 may be natural magnets.

Compared with the related art, in the speaker provided by the invention, the avoiding portion 2411 is arranged on the lower framework 24, and the pad 21212 is accommodated in the avoiding portion 2411, so that the problem that an avoiding hole slot is formed in the lower vibrating diaphragm 2122 to match with the routing of the conductive plate 2121 is avoided, the integrity of the lower vibrating diaphragm 2122 is ensured, and the anti-swing capability of the speaker 100 is improved.

The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims

1. A loudspeaker comprises a frame, a vibration system fixed on the frame and a magnetic circuit system arranged in the frame and driving the vibration system to vibrate, wherein the magnetic circuit system has a magnetic gap, and is characterized in that the vibration system comprises a lower framework surrounding the magnetic circuit system and an upper sound film and a lower supporting part connected with two ends of the lower framework, the upper sound film and the lower supporting part are fixed on the frame, the lower supporting part surrounds the magnetic circuit system, the lower supporting part comprises a current conducting plate fixed on one side of the lower framework far away from the upper sound film and a lower vibrating plate fixed on one side of the current conducting plate far away from the lower framework, the current conducting plate comprises a supporting arm fixedly connected with the frame, a bonding pad fixed on the lower framework and an elastic arm connecting the supporting arm and the bonding pad, the outer periphery of the lower vibrating plate is fixedly connected with the supporting arm, the internal peripheral rigid coupling of lower vibrating diaphragm in lower skeleton, down the skeleton include with the first connection face of the internal peripheral rigid coupling of lower vibrating diaphragm, the skeleton corresponds down the position of pad is equipped with accepts the portion of dodging of pad, dodge the portion certainly first connection face is to being close to go up the sunken formation of sound membrane's direction.

2. The speaker of claim 1, wherein a recess depth of the escape is greater than or equal to a thickness of the land.

3. The speaker of claim 1, wherein the shape of the evading portion matches the shape of the land and the evading portions correspond one-to-one to the number of the lands.

4. The loudspeaker of claim 1, wherein said vibration system further comprises a voice coil inserted into said magnetic gap and driving said upper diaphragm to vibrate and generate sound, said voice coil including a first side portion disposed opposite to each other, a second side portion disposed opposite to each other, and a corner portion connecting adjacent said first side portion and said second side portion, said bypass portion being correspondingly disposed at said corner portion.

5. The loudspeaker of claim 1, wherein said vibration system further comprises a voice coil inserted into said magnetic gap and driving said upper diaphragm to vibrate and emit sound; the first connecting surface is annular and is arranged around the magnetic circuit system, the lower framework further comprises a plurality of fixing pins which are formed by extending from the inner periphery of the first connecting surface to the direction close to the upper sound film, and the plurality of fixing pins are fixedly connected with one end of the voice coil close to the upper sound film respectively.

6. The speaker of claim 5, wherein the voice coil is a rounded rectangle, and the four fixing legs are fixed at the rounded corners of the voice coil.

7. The loudspeaker of claim 5, wherein the lower frame further comprises a third connecting surface extending from the outer periphery of the first connecting surface toward the upper diaphragm, and a second connecting surface extending from the end of the third connecting surface toward the magnetic circuit system; the upper sound film comprises a first film body arranged around the magnetic circuit system, a second film body arranged around the first film body and fixedly connected with the basin frame, and a dome connected with the first film body and the second film body, and the second connecting surface is connected below the dome.

8. The loudspeaker according to claim 7, wherein the vibration system further comprises an upper frame at least partially covering the magnetic circuit system, and the first membrane body is attached to the upper frame near a periphery of one side of the magnetic circuit system.

9. The loudspeaker of claim 8, wherein the magnetic circuit system comprises an upper clamp plate, a lower clamp plate, and a main magnetic portion and a plurality of auxiliary magnetic portions located between the upper clamp plate and the lower clamp plate, the main magnetic portion and the plurality of auxiliary magnetic portions are fixedly disposed on the lower clamp plate, the plurality of auxiliary magnetic portions are disposed around the main magnetic portion and spaced from the main magnetic portion to form the magnetic gap, the upper clamp plate is covered on the main magnetic portion, and the upper frame is covered on a side of the upper clamp plate away from the main magnetic portion.

10. The speaker of claim 9, wherein the upper plate includes a first portion covering the main magnetic portion, a second portion extending from a periphery of the first portion to be bent toward the lower plate and surrounding the main magnetic portion, and a third portion extending from the second portion to be away from the main magnetic portion and covering the secondary magnetic portion; the second portion is provided with an opening penetrating through the second portion, and the fixing pin is fixedly connected to the voice coil through the opening.