CN113630699B

CN113630699B - Loudspeaker

Info

Publication number: CN113630699B
Application number: CN202110706151.9A
Authority: CN
Inventors: 徐一丹; 赵峥; 李红元; 吴逸飞
Original assignee: Bestar Holding Co ltd
Current assignee: Bestar Holding Co ltd
Priority date: 2021-06-24
Filing date: 2021-06-24
Publication date: 2023-03-10
Anticipated expiration: 2041-06-24
Also published as: CN113630699A

Abstract

The invention relates to the technical field of flat loudspeakers, in particular to a loudspeaker structure, wherein a shell is provided with a cavity matched with a substrate, a vibrating diaphragm is arranged at the opening end of the shell, a magnetic return component is fixed in the cavity, and a voice coil component is positioned in the magnetic return component and fixedly connected with the vibrating diaphragm; a coil is wound on a substrate of the voice coil assembly; the magnetic return assembly comprises magnetic steels on two sides of the substrate, an upper pole piece and a lower pole piece are respectively arranged on the upper side and the lower side of each magnetic steel, and the two magnetic steels on the two sides of the substrate are respectively magnetized towards opposite directions along the vertical direction. The base plate can be arranged into various curve plate types, and the shapes of the magnetic return assembly and the shell are changed adaptively, so that the loudspeaker can be suitable for different spaces, the space is saved, and the attractive design of an application product is facilitated; the upper part and the lower part of a coil in the voice coil assembly respectively correspond to the upper pole piece and the lower pole piece, the directions of magnetic fields between the two adjacent pole pieces are opposite, and the overall stress directions of the coil are consistent by introducing reverse current into the upper part and the lower part of the coil.

Description

Loudspeaker

Technical Field

The invention relates to the technical field of flat panel speakers, in particular to a speaker.

Background

Most of the existing loudspeakers used in electronic equipment are circular, and are mainly constrained by the shape of a winding coil, so that the stress of the coil in a magnetic field needs to be ensured to be uniform, and the directivity and distortion of propagation are ensured while sound pressure is ensured. The design of the loudspeaker is influenced by the lightness and thinness of the mobile phone, the pad sound and the like, the loudspeaker is designed into a rectangle, and the sound pressure is raised by using a three-magnet/five-magnet mode, so that the cost is improved invisibly.

And no matter the design is circular or rectangular, the length and width of the product all require certain size, and certain space needs to be reserved in the product for the loudspeaker or a BOX structure is added to the loudspeaker.

In view of the above problems, the present designer is actively making research and innovation based on the practical experience and professional knowledge that is abundant for many years in engineering application of such products, in order to create a speaker, which is more practical.

Disclosure of Invention

The present invention aims to provide a loudspeaker which overcomes the drawbacks of the prior art.

In order to achieve the purpose, the invention adopts the technical scheme that: a loudspeaker, comprising: the voice coil component is positioned in the magnetic return component and fixedly connected with the vibrating diaphragm;

the voice coil assembly comprises a substrate, a first coil and a second coil, wherein the first coil and the second coil are symmetrically arranged on two sides of the substrate;

the magnetic return assembly comprises magnetic steels symmetrically arranged on two sides of the substrate, an upper pole piece and a lower pole piece are respectively arranged on the upper side and the lower side of each magnetic steel, and the two magnetic steels located on two sides of the substrate are respectively magnetized towards opposite directions along the vertical direction.

Further, the first coil and the second coil are coiled into a ring shape along the length direction of the substrate;

the first coil with the second coil all includes horizontal coil portion and vertical coil portion, just horizontal coil portion includes upper portion and lower part, just the upper portion and the lower part of horizontal coil portion respectively with go up the pole piece with the pole piece corresponds the setting down.

Further, the current direction of the upper part of the transverse coil part is opposite to the coil direction of the lower part of the transverse coil part;

the upper part of the transverse coil part is positioned between the two upper pole pieces, and the lower part of the transverse coil part is positioned between the two lower pole pieces.

Further, the substrate is arranged to be a linear plate or a curved plate along the length direction of the substrate.

Furthermore, two ends of the substrate in the length direction are at different angles and extend in a forked manner along the horizontal direction.

Furthermore, the magnetic steel, the upper pole piece and the lower pole piece are arranged in parallel with the substrate in the horizontal plane.

Furthermore, the first coil and the second coil are fixedly arranged on two sides of the substrate respectively through bonding or plastic spraying.

Furthermore, a limit groove is formed in one side, far away from the vibrating diaphragm, of the fixing block along the length direction of the fixing block, the top of the base plate is embedded into the limit groove and fixedly connected with the fixing block, and the top of the fixing block is bonded to the bottom surface of the vibrating diaphragm.

Furthermore, a cavity matched with the substrate is arranged in the shell, the cavity comprises a first step and a second step which are arranged along the vertical direction, and the magnetic return assembly is fixed between the first step and the second step;

the upper surface of the upper pole piece is abutted to the first step, and the lower surface of the lower pole piece is abutted to the second step.

Furthermore, a middle paste is arranged on the upper surface of the vibrating diaphragm, a layer of middle paste is arranged corresponding to the fixed block, and an annular folding ring is arranged on the vibrating diaphragm and arranged on the middle paste outer ring and is adaptive to the shape of the middle paste.

The invention has the beneficial effects that: in the invention, the substrate in the loudspeaker can be arranged into various curve board types according to the application space, and the shapes of the magnetic return assembly and the shell are adaptively changed, so that the loudspeaker is more practical, can be suitable for different spaces, saves the space and is more favorable for the attractive design of application products;

the voice coil component adopts two magnetic structures, the upper part and the lower part of the corresponding transverse coil part in the magnetic return component respectively correspond to the upper pole piece and the lower pole piece, so that the directions of magnetic fields between the two adjacent upper and lower pole pieces are opposite, the whole stress directions of the coil are consistent by introducing current in opposite directions into the upper part and the lower part of the transverse coil part, and the base plate is driven to move up and down, so that the vibrating diaphragm is pushed to vibrate up and down to pronounce.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the description of the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments described in the present invention, and it is also possible for those skilled in the art to obtain other drawings based on the drawings without creative efforts.

FIG. 1 is a schematic diagram of a speaker according to an embodiment of the present invention;

FIG. 2 is an exploded view of a speaker according to an embodiment of the present invention;

FIG. 3 is a schematic cross-sectional view of a speaker according to an embodiment of the present invention;

FIG. 4 is a schematic diagram of a voice coil assembly according to an embodiment of the present invention;

FIG. 5 is a schematic diagram of the magnetic field distribution and coil current flow of the MR element in an embodiment of the present invention;

FIG. 6 is a schematic view of another voice coil assembly according to another exemplary embodiment of the present invention;

FIG. 7 is a schematic diagram of another voice coil assembly according to another exemplary embodiment of the present invention.

Reference numerals are as follows: 1. a housing; 11. a cavity; 12. a first step; 13. a second step; 2. a magnetic return component; 21. magnetic steel; 22. feeding a pole piece; 23. a lower pole piece; 3. a voice coil assembly; 31. a substrate; 32. a first coil; 33. a second coil; 34. a fixed block; 341. a limiting groove; 35. a lateral coil part; 36. a vertical coil section; 4. vibrating diaphragm; 41. middle pasting; 42. and (5) folding the ring.

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.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

As shown in fig. 1 to 7, a speaker includes a housing 1, a magnetic loop assembly 2, a voice coil assembly 3, and a diaphragm 4, wherein the top of the housing 1 is provided with an open end, and a cavity 11 communicated with the open end is provided corresponding to the open end, the diaphragm 4 is provided at the open end of the housing 1, the magnetic loop assembly 2 is fixed in the cavity 11, and the voice coil assembly 3 is located in the magnetic loop assembly 2 and is fixedly connected with the diaphragm 4; the voice coil assembly 3 comprises a substrate 31, and a first coil 32 and a second coil 33 which are symmetrically arranged on two sides of the substrate 31, wherein the substrate 31 is arranged perpendicular to a horizontal plane and is fixed on the bottom surface of the vibrating diaphragm 4 through a fixing block 34; the magnetic return component 2 comprises magnetic steels 21 symmetrically arranged on two sides of the substrate 31, an upper pole piece 22 and a lower pole piece 23 are respectively arranged on the upper side and the lower side of the magnetic steels 21, and the two magnetic steels 21 on two sides of the substrate 31 are respectively magnetized towards opposite directions along the vertical direction.

As a preferred embodiment of the present invention, further, the first coil 32 and the second coil 33 are both coiled in a ring shape along the length direction of the substrate 31; as shown in fig. 4, each of the first coil 32 and the second coil 33 includes a horizontal coil portion 35 and a vertical coil portion 36, and the horizontal coil portion 35 includes an upper portion and a lower portion, and the upper portion and the lower portion of the horizontal coil portion 35 are disposed corresponding to the upper pole piece 22 and the lower pole piece 23, respectively. And the direction of current flow in the upper portion of the lateral coil portion 35 is opposite to the direction of current flow in the lower portion of the lateral coil portion 35; the upper part of the transverse coil part 35 is positioned between the two upper pole pieces 22, and the lower part of the transverse coil part 35 is positioned between the two lower pole pieces 23.

In the specific implementation process, as shown in fig. 2, the housing 1 of the speaker may be made of a plastic material and configured to have an appearance adapted to the shape of the substrate 31, and the cavity 11 of the speaker is also configured to have a shape adapted to the substrate 31 and configured to fix the gyromagnetic component 2 and mount the substrate 31, the substrate 31 is bonded to the bottom surface of the diaphragm 4 through the fixing block 34, and can drive the substrate 31 and drive the diaphragm 4 to vibrate together by the magnetic field after the coil is powered on, the fixing block 34 is made of an aluminum material and is provided with a limiting groove 341 for clamping the substrate 31, and the diaphragm 4 is made of a composite film PEEK or a single-film PEI material and is bonded to the opening end of the housing 1. The voice coil assembly 3 adopts two magnetic structures, the upper part and the lower part of the corresponding transverse coil part 35 in the magnetic return assembly 2 respectively correspond to the upper pole piece 22 and the lower pole piece 23, so that the magnetic field directions between the two adjacent upper and lower pole pieces 23 are opposite, the whole stress directions of the coil are consistent by passing currents in opposite directions in the upper part and the lower part of the transverse coil part 35, as shown in fig. 5, the coil drives the substrate 31 to move up and down under the driving of the magnetic field, and further the vibrating diaphragm 4 is pushed to vibrate up and down to pronounce.

In the above embodiment, the magnetic steel 21, the upper pole piece 22, and the lower pole piece 23 are preferably arranged parallel to the substrate 31 in the horizontal plane. Because the magnetic steel 21, the upper pole piece 22 and the lower pole piece 23 are all provided with two groups and symmetrically arranged on two sides of the substrate 31, the distances between the magnetic return assemblies 2 on two sides and the substrate 31 are always kept consistent. When the current flows through the coil on the substrate 31, the magnetic force received by the first coil 32 and the second coil 33 is stabilized.

Further, the first coil 32 and the second coil 33 are fixedly disposed on both sides of the substrate 31 by bonding or injection molding, respectively. Make voice coil loudspeaker voice coil subassembly 3's structure more firm, the coil sets up with base plate 31 is integrative, and the magnetic field force transmission that makes the coil receive is more accurate firm.

As a preferred embodiment, a limit groove 341 is formed along the length direction of the fixing block 34 on the side away from the diaphragm 4, the top of the substrate 31 is embedded into the limit groove 341 and is fixedly connected with the fixing block 34, and the top of the fixing block 34 is adhered to the bottom surface of the diaphragm 4. In the present invention, the substrate 31 is formed as a curved plate along the length direction thereof, and the stopper groove 341 is formed as a curve with respect to the substrate 31, so that the connection between the portion of the substrate 31 inserted into the stopper groove 341 and the fixing block 34 is more stable, and the engagement between the substrate 31 and the fixing block is more stable than the engagement between the straight plate and the straight groove.

Further, the cavity 11 is adapted to the substrate 31, the cavity 11 includes a first step 12 and a second step 13 arranged along a vertical direction, and the gyromagnetic component 2 is fixed between the first step 12 and the second step 13; the upper surface of the upper pole piece 22 abuts against the first step 12, and the lower surface of the lower pole piece 23 abuts against the second step 13. The gyromagnetic assembly 2 is clamped and fixed by the first step 12 and the second step 13 which are arranged at the upper part and the lower part in the cavity 11, so that the magnetic field formed by the gyromagnetic assembly 2 is more stable.

In the invention, a middle paste 41 is arranged on the upper surface of the diaphragm 4, a layer of the middle paste 41 is arranged corresponding to the fixed block 34, and an annular folded ring 42 is arranged on the diaphragm 4, wherein the folded ring 42 is arranged on the outer ring of the middle paste 41 and is adaptive to the shape of the middle paste 41. The middle paste 41 is made of carbon fiber or aluminum. The edge 42 is provided around the center sticker 41 with the substrate 31 as the center, and can damp the vibration of the diaphragm 4 and improve the resonance frequency.

As another preferred embodiment of the present invention, in the present invention, the substrate 31 is provided as a linear plate or a curved plate along its length direction. Alternatively, the substrate 31 may be branched and extended in the horizontal direction at different angles at both ends in the longitudinal direction. As shown in fig. 6 and 7, in fig. 6, two parts are formed by extending the substrate 31 at one end of the substrate 31 in a bifurcated manner, the two parts of the bifurcated manner are the same as the body of the substrate 31, are both perpendicular to the horizontal plane and are arranged as linear plates along the horizontal direction, and in the specific implementation process, the two parts can be arranged as curved plates, or the length of the substrate 31 in the horizontal direction is increased, so that the loudspeaker can adapt to various different application spaces by changing the shape and structure of the loudspeaker, and the space is saved, which is more beneficial to the aesthetic design of the application product.

It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. A loudspeaker, comprising: the voice coil loudspeaker comprises a shell (1), a magnetic return component (2), a voice coil component (3) and a vibrating diaphragm (4), wherein the top of the shell (1) is provided with an open end, a cavity (11) communicated with the open end is arranged corresponding to the open end, the vibrating diaphragm (4) is arranged at the open end of the shell (1), the magnetic return component (2) is fixed in the cavity (11), and the voice coil component (3) is positioned in the magnetic return component (2) and fixedly connected with the vibrating diaphragm (4);

the voice coil assembly (3) comprises a substrate (31), and a first coil (32) and a second coil (33) which are symmetrically arranged on two sides of the substrate (31), wherein the first coil (32) and the second coil (33) are respectively fixedly arranged on two sides of the substrate (31) through bonding or plastic spraying, and the substrate (31) is arranged vertical to a horizontal plane and is fixed on the bottom surface of the vibrating diaphragm (4) through a fixing block (34);

magnetism returns subassembly (2) including the symmetry sets up magnet steel (21) of base plate (31) both sides upper and lower both sides of magnet steel (21) are provided with pole piece (22) and lower pole piece (23) respectively, are located two of base plate (31) both sides magnet steel (21) are followed vertical direction respectively and are magnetized towards opposite direction.

2. A loudspeaker according to claim 1, wherein the first coil (32) and the second coil (33) are each coiled in a loop along the length of the substrate (31);

first coil (32) with second coil (33) all includes horizontal coil portion (35) and vertical coil portion (36), just horizontal coil portion (35) includes upper portion and lower part, just the upper portion and the lower part of horizontal coil portion (35) respectively with go up pole piece (22) with lower pole piece (23) correspond the setting.

3. A loudspeaker according to claim 2, wherein the direction of current flow in the upper part of the lateral coil portion (35) is opposite to the direction of the coil in the lower part of the lateral coil portion (35);

the upper part of the transverse coil part (35) is positioned between the two upper pole pieces (22), and the lower part of the transverse coil part (35) is positioned between the two lower pole pieces (23).

4. A loudspeaker according to claim 3, wherein the substrate (31) is arranged as a rectilinear or curvilinear panel along its length.

5. A loudspeaker according to claim 3, wherein the two ends of the substrate (31) in the longitudinal direction are divergently arranged at different angles in the horizontal direction.

6. A loudspeaker according to any one of claims 4 and 5, wherein the magnetic steel (21), the upper pole piece (22) and the lower pole piece (23) are all arranged parallel to the substrate (31) in a horizontal plane.

7. A loudspeaker according to claim 6, wherein a limit groove (341) is formed in the length direction of the fixing block (34) on the side away from the diaphragm (4), the top of the substrate (31) is embedded in the limit groove (341) and fixedly connected with the fixing block (34), and the top of the fixing block (34) is adhered to the bottom surface of the diaphragm (4).

8. A loudspeaker according to claim 6, wherein the cavity (11) is adapted to the substrate (31), the cavity (11) comprising a first step (12) and a second step (13) arranged in a vertical direction, the gyromagnetic component (2) being fixed between the first step (12) and the second step (13);

the upper surface of the upper pole piece (22) is abutted against the first step (12), and the lower surface of the lower pole piece (23) is abutted against the second step (13).

9. A loudspeaker according to claim 6, characterized in that a middle paste (41) is arranged on the upper surface of the diaphragm (4), a layer of the middle paste (41) is arranged corresponding to the fixing block (34), an annular corrugated rim (42) is arranged on the diaphragm (4), and the corrugated rim (42) is arranged on the outer ring of the middle paste (41) and is adapted to the shape of the middle paste (41).