Speaker and its conductive component installation method

Abstract

This invention provides a loudspeaker comprising a frame, a vibration system, and a magnetic circuit system. The vibration system includes a diaphragm, a voice coil, and a conductive component. The diaphragm includes an annular surround, a fixing portion extending from the outer periphery of the surround towards the frame, and a vibrating portion extending from the inner periphery of the surround towards the voice coil. The conductive component includes a flexible conductive sheet fixed to the vibrating portion along the diaphragm vibration direction near the voice coil, and a conductive coating attached to the diaphragm along the vibration direction near the magnetic circuit system. A voice coil lead is fixed between and electrically connected to the conductive sheet and the conductive coating. The orthographic projection of the conductive sheet onto a plane perpendicular to the vibration direction falls entirely within the range of the orthographic projection of the vibrating portion onto a plane perpendicular to the vibration direction. Compared with the prior art, this invention saves space occupied by the conductive component inside the loudspeaker, facilitates the design of larger magnetic circuit structures, and improves the loudspeaker's sound performance.

Description

Technical Field

[0001] This invention relates to an acoustic device, and more particularly to a loudspeaker and a method for arranging its conductive components. Background Technology

[0002] Speakers are widely used in consumer electronic devices such as smartphones, tablets, and headphones. Their sound performance directly affects the user's listening experience. The core of the sound production lies in the vibration of the voice coil in the magnetic circuit system by electromagnetic force, which drives the diaphragm to produce sound.

[0003] In existing loudspeakers, the voice coil is usually directly connected to a conductive component (such as a flexible circuit board). One end of the conductive component is soldered to the lead-out end of the voice coil, and the other end extends to the outside of the device to achieve electrical connection.

[0004] However, this design has obvious drawbacks: the conductive components need to be placed in the gap or surrounding area between the magnetic circuit system and the voice coil, which inevitably occupies the magnetic circuit space, resulting in a reduction in the magnetic flux density of the magnetic circuit system, weakening the electromagnetic driving force, and making it difficult to meet the demand of consumer electronics for high-fidelity sound.

[0005] Therefore, it is necessary to provide a new method for setting up the loudspeaker and its conductive components to solve the above problems. Summary of the Invention

[0006] The technical problem to be solved by the present invention is to provide a speaker with a smaller space occupied by conductive components and a method for setting the conductive components therewith.

[0007] To solve the above-mentioned technical problems, in a first aspect, the present invention provides a loudspeaker, which includes a frame, a vibration system fixed to the frame, and a magnetic circuit system for driving the vibration system to vibrate and generate sound. The vibration system includes a diaphragm fixed to the frame, a voice coil for driving the diaphragm to vibrate and generate sound, and a conductive component for providing an electrical signal to the voice coil. The diaphragm includes an annular surround portion, a fixing portion extending from the outer periphery of the surround portion toward the frame, and a vibrating portion extending from the inner periphery of the surround portion toward the voice coil.

[0008] The conductive component includes a flexible conductive sheet fixed to the vibrating part along the vibration direction of the diaphragm near the voice coil side, and a conductive coating attached to the vibrating part of the diaphragm along the vibration direction of the diaphragm near the magnetic circuit system side; the lead of the voice coil is fixed between the conductive sheet and the conductive coating and is electrically connected to the conductive coating and the conductive sheet, and the orthographic projection of the conductive sheet on the plane perpendicular to the vibration direction falls completely within the range of the orthographic projection of the vibrating part on the plane perpendicular to the vibration direction.

[0009] Preferably, the conductive component further includes a conductive element fixed to the basin frame and used for electrical connection with an external circuit, the conductive element being electrically connected to the conductive sheet and the conductive coating.

[0010] Preferably, the conductive coating extends from the vibrating part through the folded ring part to the fixing part, forming a first coating applied to the vibrating part, a second coating applied to the folded ring part, and a third coating applied to the fixing part, and the conductive sheet is applied and fixed to the side of the first coating away from the diaphragm.

[0011] Preferably, the conductive element includes a first conductive portion clamped and fixed between the third coating and the diaphragm, a second conductive portion fixed to the side of the frame away from the diaphragm along the vibration direction, and a third conductive portion connecting the first conductive portion and the second conductive portion and attached to the frame; the orthographic projection of the first conductive portion on a plane perpendicular to the vibration direction falls completely within the range of the orthographic projection of the fixing portion on a plane perpendicular to the vibration direction.

[0012] Preferably, the first conductive part and the second conductive part are flat and parallel to the fixing part, and the first conductive part is embedded in the fixing part on the side of the basin frame along the vibration direction.

[0013] Preferably, the voice coil leads include an input terminal and an output terminal, and the conductive sheet includes two conductive sheets, which are respectively welded and fixed to the input terminal and the output terminal to achieve electrical connection.

[0014] Preferably, the conductive element comprises two components, which are electrically connected to the input terminal and the output terminal respectively through a conductive coating.

[0015] Preferably, the conductive component further includes an insulating layer attached to the conductive coating on the side away from the diaphragm, and the orthographic projection of the insulating layer on a plane perpendicular to the vibration direction of the diaphragm does not coincide with the orthographic projections of the conductive element and the conductive sheet on a plane perpendicular to the vibration direction of the diaphragm.

[0016] Preferably, the conductive sheet is made of a flexible circuit board; the conductive coating is made of conductive silver paste or conductive colloid.

[0017] Secondly, the present invention also provides a method for setting the conductive components of a loudspeaker as described above, comprising the following steps:

[0018] A conductive coating is provided on the side of the diaphragm near the magnetic circuit system, extending from the vibrating part through the folded ring part to the fixing part, and a first coating is attached to the vibrating part, a second coating is attached to the folded ring part, and a third coating is attached to the fixing part.

[0019] The lead wire of the voice coil is soldered and fixed to the first coating using the conductive sheet, and the lead wire of the voice coil is sandwiched between the conductive sheet and the first coating.

[0020] The conductive element is bonded and fixed to the third coating to achieve electrical connection between the voice coil lead, the conductive coating, and the conductive element.

[0021] Compared with related technologies, the loudspeaker of the present invention includes a frame, a vibration system fixed to the frame, and a magnetic circuit system for driving the vibration system to vibrate and produce sound. The vibration system includes a diaphragm fixed to the frame, a voice coil for driving the diaphragm to vibrate and produce sound, and a conductive component for providing an electrical signal to the voice coil. The diaphragm includes an annular surround, a fixing portion extending from the outer periphery of the surround towards the frame, and a vibrating portion extending from the inner periphery of the surround towards the voice coil. The conductive component includes a flexible conductive sheet fixed to the vibrating portion along the vibration direction of the diaphragm near the voice coil, and a conductive coating attached to the side of the diaphragm along the vibration direction near the magnetic circuit system. The lead of the voice coil is fixed between the conductive sheet and the conductive coating and is electrically connected to the conductive coating and the conductive sheet. The orthographic projection of the conductive sheet on a plane perpendicular to the vibration direction falls completely within the range of the orthographic projection of the vibrating portion on a plane perpendicular to the vibration direction. In the above structure, by splitting the conductive structure and using different conductive components to connect the voice coil and external circuit, and using a conductive coating that is attached to the diaphragm to connect different conductive components, this design makes it easy to make the structure of the conductive components smaller, saving their space inside the speaker, thereby designing a larger magnetic circuit structure and improving the speaker's sound performance. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort, wherein:

[0023] Figure 1 This is a schematic diagram of the overall structure of the loudspeaker provided in an embodiment of the present invention;

[0024] Figure 2 An exploded view of the loudspeaker provided in an embodiment of the present invention;

[0025] Figure 3 For along Figure 1 Sectional view of line AA in the middle;

[0026] Figure 4 For along Figure 1 Sectional view of the middle BB line;

[0027] Figure 5 This is a partially exploded view of a loudspeaker provided in an embodiment of the present invention. Detailed Implementation

[0028] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0029] Example 1

[0030] Please see Figure 1-5 As shown, an embodiment of the present invention provides a loudspeaker 100, which includes a frame 1, a vibration system 2 fixed to the frame 1, and a magnetic circuit system 3 for driving the vibration system 2 to vibrate and produce sound. The vibration system 2 includes a diaphragm 21 fixed to the frame 1, a voice coil 22 for driving the diaphragm 21 to vibrate and produce sound, and a conductive component 23 for providing an electrical signal to the voice coil 22. The diaphragm 21 includes an annular folded portion 211, a fixing portion 212 extending from the outer periphery of the folded portion 211 toward the frame 1, and a vibrating portion 213 extending from the inner periphery of the folded portion 211 toward the voice coil 22.

[0031] The conductive component 23 includes a flexible conductive sheet 231 fixed to the vibrating part 213 along the vibration direction of the diaphragm 21 near the voice coil 22, and a conductive coating 232 attached to the diaphragm 21 along the vibration direction near the magnetic circuit system 3; the lead wire of the voice coil 22 is fixed between the conductive sheet 231 and the conductive coating 232 and is electrically connected to the conductive coating 232 and the conductive sheet 231, and the orthographic projection of the conductive sheet 231 on the plane perpendicular to the vibration direction falls completely within the range of the orthographic projection of the vibrating part 213 on the plane perpendicular to the vibration direction.

[0032] In this embodiment of the invention, the conductive coating 232 can be obtained by applying conductive silver paste, conductive colloid, etc., to the surface of the diaphragm 21. Both conductive silver paste and conductive colloid are liquid media with the characteristic of variable shape; while the conductive sheet 231 is made based on a flexible circuit board. In this embodiment of the invention, as... Figure 2 and Figure 5 As shown, the conductive sheet 231 is used to connect the voice coil 22, while the conductive coating 232 is attached to the diaphragm 21 and serves as an intermediary for conducting electrical signals between the conductive sheet 231 and the external circuit. Compared with the integrated conductive structure, the design of the multi-segment conductive component 23 makes it easier to achieve structural miniaturization and reduce the volume of the conductive structure that crosses the folded portion of the diaphragm 21, thereby saving the space occupied by the conductive structure inside the speaker 100. Furthermore, since the conductive sheet 231 is attached to the vibrating part 213, the selection of the flexible circuit board takes into account both the small size of the conductive component and the vibration stability of the diaphragm 21. The space saved can be used to design a larger magnetic circuit structure, which can improve the sound performance of the speaker 100.

[0033] Furthermore, the conductive sheet 231 is disposed at the position of the first coating 2321 on the surface of the vibrating part 213. Since the vibrating part 213 is closer to the magnetic gap, in this embodiment of the invention, the conductive sheet 231 is completely attached to the first coating 2321, and its orthogonal projection on the plane of the vibration direction of the diaphragm 21 completely falls within the range of the orthogonal projection of the vibrating part 213 on the plane of the vibration direction of the diaphragm 21. This makes the volume of the conductive sheet 231 as small as possible, thereby reducing the impact on the vibrating part 213 of the diaphragm 21 and the magnetic circuit system 3.

[0034] In this embodiment of the invention, the conductive component 23 further includes a conductive element 233 fixed to the basin frame 1 and used for electrical connection with an external circuit. The conductive element 233 is electrically connected to the conductive sheet 231 and the conductive coating 232. The conductive coating 232 extends from the vibrating part 213 through the folded ring part 211 to the fixing part 212, forming a first coating 2321 attached to the vibrating part 213, a second coating 2322 attached to the folded ring part 211, and a third coating 2323 attached to the fixing part 212. The conductive sheet 231 is attached and fixed to the side of the first coating 2321 away from the diaphragm 21.

[0035] The conductive element 233 includes a first conductive portion 2331 clamped and fixed between the third coating 2323 and the diaphragm 21, a second conductive portion 2332 fixed to the side of the basin frame 1 away from the diaphragm 21 along the vibration direction, and a third conductive portion 2333 connecting the first conductive portion 2331 and the second conductive portion 2332 and attached to the basin frame 1; the orthographic projection of the first conductive portion 2331 on a plane perpendicular to the vibration direction falls completely within the range of the orthographic projection of the fixing portion 212 on a plane perpendicular to the vibration direction.

[0036] Similarly, the conductive element 233 is completely attached to the third coating 2323, and the orthographic projection of the first conductive part 2331 on the plane perpendicular to the vibration direction falls completely within the range of the orthographic projection of the fixing part 212 on the plane perpendicular to the vibration direction of the diaphragm 21. This design is also used to achieve miniaturization of the vibration system 2.

[0037] The first conductive part 2331 and the second conductive part 2332 are flat and parallel to the fixing part 212. The first conductive part 2331 is embedded in the fixing part 212 on the side close to the basin frame 1 along the vibration direction.

[0038] With this design, the conductive component 233 is formed into a C-shaped structure and is fitted to the basin frame 1. This design helps to further reduce the volume of the conductive component 23 and facilitates electrical connection with the external circuit through the exposed portions of the second conductive part 2332 and the third conductive part 2333 of the basin frame.

[0039] Preferably, the lead wire of the voice coil 22 includes an inlet terminal 221 and an outlet terminal 222, and the conductive sheet 231 includes two, which are respectively welded and fixed to the inlet terminal 221 and the outlet terminal 222 to achieve electrical connection.

[0040] In embodiments of the present invention, such as Figure 2 As shown, the orthographic projections of the voice coil 22 and the diaphragm 21 on a plane perpendicular to the vibration direction of the diaphragm 21 are both rectangles. The input terminal 221 and the output terminal 222 are both located on the same short rectangular side of the voice coil 22. The two conductive sheets 231 are respectively fixedly located at the two apex corners of the vibrating part 213 near the same short rectangular side of the input terminal 221 and the output terminal 222.

[0041] like Figure 2 and Figure 4As shown, in this embodiment of the invention, two sets of conductive components 23 are arranged along the long axis of the loudspeaker 100. Since the voice coil 22 is generally designed with two lead terminals, different conductive sheets 231 are set for each lead terminal, and the size of the conductive sheets 231 is designed respectively. (Compared to the design of a whole conductive sheet 231) the volume of the conductive sheet 231 can be further reduced. The welding connection method can ensure the connection stability between the lead terminal and the conductive sheet 231.

[0042] In this embodiment of the invention, the conductive element 233 includes two components, which are electrically connected to the input terminal 221 and the output terminal 222 respectively through the conductive coating 232.

[0043] During implementation, additional conductive elements 233 can be provided as needed, and they can be distributed at the apex positions of different rectangular long sides of the fixing part 212. The conductive elements 233 are electrically connected to the conductive sheet 231 and the conductive coating 232 located on the same rectangular long side. For example,... Figure 2 and Figure 4 As shown, in this embodiment of the invention, four conductive elements 233 are designed at the four corners of the loudspeaker 100. During implementation, depending on the actual installation position of the loudspeaker 100, different conductive elements 233 on different long sides of the outer periphery of the diaphragm 21 can be connected to external circuits, and the external circuits can be electrically connected to the corresponding conductive sheets 231 through the conductive coating 232, thereby realizing the signal transmission of external signals to the voice coil 22.

[0044] Preferably, the conductive component 23 further includes an insulating layer 24 attached to the conductive coating 232 on the side away from the diaphragm, and the orthographic projection of the insulating layer 24 on a plane perpendicular to the vibration direction of the diaphragm 21 does not coincide with the orthographic projections of the conductive element 233 and the conductive sheet 231 on a plane perpendicular to the vibration direction of the diaphragm 21.

[0045] Since the conductive component 23 is located on the side of the diaphragm 21 close to the magnetic circuit system 3, in order to avoid affecting the magnetic circuit system 3, an insulating layer 24 is provided on the outer surface of the conductive coating 232 to maintain signal insulation and ensure that the speaker 100 functions normally.

[0046] Specifically, in this embodiment of the invention, the vibration system 2 further includes a dome 25 and a frame 26. The dome 25 is fixedly disposed on the side of the vibrating part 213 away from the voice coil 22, and the voice coil 22 is suspended by the frame 26 on the side of the dome 25 closer to the magnetic circuit system 3. The dome 25 structure can improve the diaphragm response speed and optimize the sound production effect; while the frame 26 can provide vibration buffer for the vibration system 2, which is beneficial to reducing distortion.

[0047] The magnetic circuit system 3 includes a lower clamping plate 31 fixedly disposed on the frame 1, a main magnet 32 ​​fixedly disposed on the lower clamping plate 31, two sets of auxiliary magnets 33 arranged around the main magnet 32 ​​and forming a magnetic gap together with the main magnet 32, and an upper clamping plate 34 covering the main magnet 32 ​​and the auxiliary magnets 33 on the side away from the lower clamping plate 31, and the voice coil 22 is inserted into the magnetic gap.

[0048] The loudspeaker 100 also includes a breathable insulating component 4. A vent hole 311 is provided through the lower clamping plate 31 along the vibration direction of the diaphragm 21. The breathable insulating component 4 is fixedly disposed on the lower clamping plate 31 and covers the vent hole 311. The breathable insulating component 4 facilitates gas exchange in the loudspeaker 100 and provides moisture protection.

[0049] In addition, such as Figure 2 As shown, the loudspeaker 100 also includes a top cover 5, which is fixedly mounted on the frame 1 and together with the vibration system 2 and the frame 1, forms the front cavity of the loudspeaker 100.

[0050] Example 2

[0051] Regarding the design of the conductive component proposed in the above embodiments, this embodiment of the invention also provides a method for setting the conductive component 23 of the speaker 100 as described in the above embodiments, the method comprising the following steps:

[0052] A conductive coating 232 is provided on the side of the diaphragm 21 near the magnetic circuit system 3, extending from the vibrating part 213 through the folded ring part 211 to the fixing part 212, and a first coating 2321 is attached to the vibrating part 213, a second coating 2322 is attached to the folded ring part 211, and a third coating 2323 is attached to the fixing part 212.

[0053] The lead wire of the voice coil 22 is soldered and fixed to the first coating 2321 using the conductive sheet 231, and the lead wire of the voice coil 22 is sandwiched between the conductive sheet 231 and the first coating 2321.

[0054] The conductive element 233 is attached and fixed to the third coating 2323 to achieve electrical connection between the lead wire of the voice coil 22, the conductive coating 232, and the conductive element 233.

[0055] In this embodiment of the invention, a multi-medium conductive component 23 is used. The conductive coating 232 is obtained by coating a liquid conductive material onto the surface of the diaphragm 21. The conductive sheet 231 and the conductive element 233 are both solid conductive materials. During the installation of the conductive component 23, due to the small size of the conductive sheet 231, a welding method is required to ensure the stability of its connection with the voice coil terminal. After the conductive coating 232 is formed (after the liquid material has dried and stabilized), the conductive sheet 231 and the conductive element 233 are attached to the corresponding positions of the conductive coating 232 (i.e., the first coating 2321 and the third coating 2323), thereby achieving the installation of the conductive component 23.

[0056] For other structures proposed in Embodiment 1 of the present invention, depending on the conductive coating material, the conductive component setting method may further include the following steps:

[0057] After the conductive sheet 231 and the conductive component 233 are attached to the conductive coating 232, an insulating layer 24 is attached to the exposed surface of the conductive coating 232.

[0058] Compared with related technologies, the loudspeaker of the present invention includes a frame, a vibration system fixed to the frame, and a magnetic circuit system for driving the vibration system to vibrate and produce sound. The vibration system includes a diaphragm fixed to the frame, a voice coil for driving the diaphragm to vibrate and produce sound, and a conductive component for providing an electrical signal to the voice coil. The diaphragm includes an annular surround, a fixing portion extending from the outer periphery of the surround towards the frame, and a vibrating portion extending from the inner periphery of the surround towards the voice coil. The conductive component includes a flexible conductive sheet fixed to the vibrating portion along the vibration direction of the diaphragm near the voice coil, and a conductive coating attached to the side of the diaphragm along the vibration direction near the magnetic circuit system. The lead of the voice coil is fixed between the conductive sheet and the conductive coating and is electrically connected to the conductive coating and the conductive sheet. The orthographic projection of the conductive sheet on a plane perpendicular to the vibration direction falls completely within the range of the orthographic projection of the vibrating portion on a plane perpendicular to the vibration direction. In the above structure, by splitting the conductive structure and using different conductive components to connect the voice coil and external circuit, and using a conductive coating that is attached to the diaphragm to connect different conductive components, this design makes it easy to make the structure of the conductive components smaller, saving their space inside the speaker, thereby designing a larger magnetic circuit structure and improving the speaker's sound performance.

[0059] The above description is merely an embodiment of the present invention. It should be noted that those skilled in the art can make improvements without departing from the inventive concept of the present invention, but these improvements all fall within the protection scope of the present invention.

Claims

1. A loudspeaker comprising a frame, a vibration system fixed to the frame, and a magnetic circuit system for driving the vibration system to vibrate and generate sound, the vibration system comprising a diaphragm fixed to the frame, a voice coil for driving the diaphragm to vibrate and generate sound, and a conductive component for providing an electrical signal to the voice coil; the diaphragm comprising an annular surround portion, a fixing portion extending from the outer periphery of the surround portion toward the frame, and a vibrating portion extending from the inner periphery of the surround portion toward the voice coil; characterized in that... The conductive component includes a flexible conductive sheet fixed to the vibrating part near the voice coil along the vibration direction of the diaphragm, and a conductive coating attached to the diaphragm near the magnetic circuit system along the vibration direction. The lead of the voice coil is fixed between the conductive sheet and the conductive coating and is electrically connected to the conductive coating and the conductive sheet. The vibrating part forms a through hole extending along the vibration direction. The vibrating system also includes a dome, which is fixed to the side of the vibrating part away from the voice coil and covers the through hole. The orthographic projection of the conductive sheet on a plane perpendicular to the vibration direction falls completely within the range of the orthographic projection of the vibrating part on a plane perpendicular to the vibration direction. The conductive sheet is made of a flexible circuit board. The conductive coating is made of conductive silver paste or conductive colloid.

2. The loudspeaker according to claim 1, characterized in that, The conductive component further includes a conductive element fixed to the basin frame and used for electrical connection with an external circuit, the conductive element being electrically connected to the conductive sheet and the conductive coating.

3. The loudspeaker according to claim 2, characterized in that, The conductive coating extends from the vibrating part through the folded ring part to the fixing part, forming a first coating applied to the vibrating part, a second coating applied to the folded ring part, and a third coating applied to the fixing part. The conductive sheet is applied and fixed to the side of the first coating away from the diaphragm.

4. The loudspeaker according to claim 3, characterized in that, The conductive element includes a first conductive portion clamped and fixed between the third coating and the diaphragm, a second conductive portion fixed to the side of the frame away from the diaphragm along the vibration direction, and a third conductive portion connecting the first conductive portion and the second conductive portion and attached to the frame; the orthographic projection of the first conductive portion on a plane perpendicular to the vibration direction falls completely within the range of the orthographic projection of the fixed portion on a plane perpendicular to the vibration direction.

5. The loudspeaker according to claim 4, characterized in that, The first conductive part and the second conductive part are flat and parallel to the fixing part. The first conductive part is embedded in the fixing part on the side of the basin frame along the vibration direction.

6. The loudspeaker according to claim 4, characterized in that, The voice coil leads include an input terminal and an output terminal. The conductive sheet includes two conductive sheets, which are respectively welded and fixed to the input terminal and the output terminal to achieve electrical connection.

7. The loudspeaker according to claim 6, characterized in that, The conductive component includes two components, which are electrically connected to the input terminal and the output terminal respectively through a conductive coating.

8. The loudspeaker according to claim 3, characterized in that, The conductive component further includes an insulating layer attached to the conductive coating on the side away from the diaphragm, and the orthographic projection of the insulating layer on a plane perpendicular to the vibration direction of the diaphragm does not coincide with the orthographic projections of the conductive element and the conductive sheet on a plane perpendicular to the vibration direction of the diaphragm.

9. A method for setting a conductive component in a loudspeaker as described in any one of claims 3-8, characterized in that, Includes the following steps: A conductive coating is provided on the side of the diaphragm near the magnetic circuit system, extending from the vibrating part through the folded ring part to the fixing part, and a first coating is attached to the vibrating part, a second coating is attached to the folded ring part, and a third coating is attached to the fixing part. The lead wire of the voice coil is soldered and fixed to the first coating using the conductive sheet, and the lead wire of the voice coil is sandwiched between the conductive sheet and the first coating. The conductive element is bonded and fixed to the third coating to achieve electrical connection between the voice coil lead, the conductive coating, and the conductive element.

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