Voice coil and sound emitting device to which the voice coil is applied

Abstract

The present invention provides a voice coil and a sound generating device to which the voice coil is applied. [Solution] The voice coil includes a coil body, the coil body includes at least two subcoil bodies pasted together in order, each subcoil body has one incoming end and one outgoing end, each subcoil body has only one current path from the incoming end to the outgoing end, the current path of each subcoil body flows in the same direction, all the incoming ends are welded together to form an incoming area located on the surface of the coil body, and all the outgoing ends are welded together to form an outgoing area located on the surface of the coil body. The voice coil of the present invention and the sound generating device to which the voice coil is applied can select a conductor with a lighter mass and a higher resistance, and have a lighter vibration mass and a better mid-frequency.

Description

Technical Field

[0001] The present invention relates to the field of electroacoustic conversion, and more particularly to a voice coil and a sound emitting device to which the voice coil is applied.

Background Art

[0002] A sound emitting device in related art includes a magnetic circuit system and a vibration system. The vibration system includes a diaphragm and a voice coil that drives the diaphragm to vibrate and produce sound. The voice coil is formed by winding a single wire.

[0003] The driving force F of the voice coil is F = BLI, where B is the electromagnetic induction intensity of the magnetic circuit system, L is the total length of the wire of the voice coil, and I is the current flowing through the wire of the voice coil. When B and L are constant, in order to improve the driving force of the voice coil, it is necessary to improve I. When the voltage across the voice coil is constant, that is, in order to reduce the resistance of the wire of the voice coil, it is necessary to replace the wire of the voice coil with a thicker one, which results in an increase in the weight of the voice coil. The increase in the vibration mass affects the mid-frequency performance.

[0004] Therefore, it is necessary to provide a new voice coil and a sound emitting device to which the voice coil is applied to solve the above technical problems.

Summary of the Invention

Problems to be Solved by the Invention

[0005] The object of the present invention is to solve the above technical problems and provide a voice coil that can select a wire with a lighter mass and a greater resistance, has a lighter vibration mass, and has a better mid-frequency, and a sound emitting device to which the voice coil is applied.

Means for Solving the Problems

[0006] To achieve the above object, the present invention provides a voice coil, which is applied to a sound emitting device. The voice coil includes a coil body portion, and the coil body portion includes at least two sub-coil bodies that are sequentially bonded together. Each sub-coil body is provided with one lead-in end and one lead-out end. Each sub-coil body forms only one current path from the lead-in end to the lead-out end, and the flowing direction of the current path of each sub-coil body is the same. All the lead-in ends are welded together to form a lead-in region located on the surface of the coil body portion, and all the lead-out ends are welded together to form a lead-out region located on the surface of the coil body portion.

[0007] Preferably, the coil body portion is formed by vertically stacking between the sub-coil bodies.

[0008] Preferably, the coil body portion is formed by fitting and embedding inside and outside between the sub-coil bodies.

[0009] Preferably, each sub-coil body is wound independently, and the winding material of at least one sub-coil body is different from the winding materials of other sub-coil bodies.

[0010] Preferably, the voice coil further includes one lead-in wire and one lead-out wire connected to the coil body portion. The lead-in wire is connected to the lead-in region, and the lead-out wire is connected to the lead-out region.

[0011] The present invention further provides a sound emitting device including the voice coil described in any one of the above.

[0012] Preferably, it further includes a flexible circuit board. The flexible circuit board includes a mounting and fixing end and a free end extending from the mounting and fixing end. The free end is fixed to the voice coil, and the free end has two pads. One pad is connected to the lead-in region, and the other pad is connected to the lead-out region.

[0013] Preferably, it further includes a conductive connection member, the conductive connection member has two pads, the incoming wire is connected to one pad, and the outgoing wire is connected to the other pad.

Advantages of the Invention

[0014] The voice coil of the present invention and the sound emitting device to which the voice coil is applied, the coil body part of the voice coil includes at least two sub-coil bodies that are sequentially bonded together, and each sub-coil body is provided with one incoming wire end and one outgoing wire end. Each sub-coil body forms only one current path from the incoming wire end to the outgoing wire end, and the flow direction of the current path of each sub-coil body is the same. All the incoming wire ends are welded together to form an incoming wire region located on the surface of the coil body part, and all the outgoing wire ends are welded together to form an outgoing wire region located on the surface of the coil body part. Compared with the related art, when B, L, and the voltage at both ends of the voice coil are constant, the voltage at both ends of each sub-coil body conducted by the incoming wire region and the outgoing wire region is the same as that of the prior art. The resistance is reduced due to the reduction of the assigned wire length. In order to obtain the same driving force as the prior art, conversely, the resistance of the sub-coil body can be increased, so that a wire with a lighter mass and a greater resistance can be selected, the vibration mass is lighter, and the intermediate frequency is better.

Brief Description of the Drawings

[0015] To more clearly explain the technical solutions in the embodiments of the present invention, the drawings required for the description of the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention, and those skilled in the art can obtain other drawings based on these drawings without creative labor.

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Embodiments for Carrying out the Invention

[0016] Hereinafter, with reference to the drawings in the embodiments of the present invention, the technical solution means in the embodiments of the present invention will be clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained on the premise that those skilled in the art do not perform creative labor shall fall within the protection scope of the present invention.

[0017] As shown in FIGS. 1 to 2, the present invention provides a voice coil 100. The voice coil 100 includes a coil main body portion 11. The coil main body portion 11 includes at least two sub-coil main bodies 111 that are sequentially bonded together. Each sub-coil main body 111 is provided with one lead-in end 121 and one lead-out end 131. Only one current path from the lead-in end 121 to the lead-out end 131 is formed in each sub-coil main body 111, and the flow direction of the current path of each sub-coil main body 111 is the same. All the lead-in ends 121 are welded together to form a lead-in region 12 located on the surface of the coil main body portion 11, and all the lead-out ends 131 are welded together to form a lead-out region 13 located on the surface of the coil main body portion 11. In this embodiment, the sub-coil main bodies 111 are stacked vertically on each other to form the coil main body portion 11.

[0018] In other embodiments, as an option, like the voice coil 100' shown in FIG. 3, the sub-coil body 111' can also be formed into the coil body portion 11' by being installed with one inside the other. Similarly, an incoming wire region 12' and an outgoing wire region 13' are formed on the surface of the coil body portion 11'.

[0019] Also, as an option, each sub-coil body 111 / 111' is wound independently, and the winding material of at least one sub-coil body 111 / 111' is different from that of the other sub-coil body 111 / 111'. The coil body portion 11 / 11' formed in this way has different outer shapes, for example, has irregular structures such as steps and concave grooves formed thereon, so that it can adapt to different application environments.

[0020] As shown in FIG. 4, the present invention further provides a sounding device 200. The sounding device 200 includes a voice coil 100 / 100' and a magnetic circuit system 201, and the voice coil 100 / 100' is inserted into the magnetic gap 202 of the magnetic circuit system 201. The sounding device 200 further includes a flexible circuit board 203, and the flexible circuit board 203 includes a mounting fixed end 204 and a free end 205 extending from the mounting fixed end 204. The free end 205 is fixed to the voice coil 100 / 100'. The free end 205 has two pads, one pad 206 is connected to the incoming wire region, and the other pad 207 is connected to the outgoing wire region. The mounting fixed end 204 may be fixed to a fixed position of the sounding device 200, and the flexible circuit board 203 serves a dual function of conducting electricity to the voice coil 100 / 100' and providing auxiliary support.

[0021] As shown in FIG. 5, the present invention further provides another voice coil 300. The voice coil 300 further includes one incoming wire 32 and one outgoing wire 33 connected to the coil body portion 31 based on the aforementioned voice coil 100 / 100'. The incoming wire 32 is connected to the incoming wire region 34, and the outgoing wire 33 is connected to the outgoing wire region 35.

[0022] As shown in FIG. 6, the present invention further provides a sound emitting device 400, and the sound emitting device 400 includes a voice coil 300. The sound emitting device 400 further includes a conductive connection member 401, the conductive connection member 401 has two pads, the input wire 32 is connected to one pad 402, and the output wire 33 is connected to the other pad 403. The conductive connection member 401 serves a dual function of energizing conduction and auxiliary support for the voice coil 300, similar to the flexible circuit board of the aforementioned sound emitting device 200. The difference is that the pads in the conductive connection member 401 are connected to the input wire 32 and the output wire 33.

[0023] As shown in FIG. 7, the present invention further provides a sound emitting device 500, and the sound emitting device 500 includes a voice coil 300. The sound emitting device 500 further includes a conductive connection member 501, the conductive connection member 501 has two pads, the input wire 32 is connected to one pad 502, and the output wire 33 is connected to the other pad 503. The conductive connection member 501 may be a circuit board or a conductive terminal fixed at a fixed position of the sound emitting device 500, and the conductive connection member 501 provides only an energizing conduction function for the voice coil 300.

[0024] The coil body part of the voice coil of the present invention includes at least two sub-coil bodies sequentially bonded together. Each sub-coil body is provided with one incoming wire end and one outgoing wire end. Only one current path from the incoming wire end to the outgoing wire end is formed in each sub-coil body, and the flowing direction of the current path of each sub-coil body is the same. All the incoming wire ends are welded together to form an incoming wire region located on the surface of the coil body part, and all the outgoing wire ends are welded together to form an outgoing wire region located on the surface of the coil body part. Compared with the related art, when B, L, and the voltage at both ends of the voice coil are constant, the voltage at both ends of each sub-coil body conducted by the incoming wire region and the outgoing wire region is the same as that of the prior art. The resistance becomes smaller due to the reduction of the assigned wire length. In order to obtain the same driving force as the prior art, conversely, the resistance of the sub-coil body may be increased, so that a wire with a lighter mass and a larger resistance can be selected, the vibration mass is lighter, and the intermediate frequency is better.

[0025] What has been described above is only the embodiments of the present invention. It should be pointed out here that those skilled in the art can further improve it without departing from the creative concept of the present invention, and all of these belong to the protection scope of the present invention.

Claims

1. A voice coil applied to a sound generating device, comprising a coil main body, the coil main body including at least two sub-coil main bodies laminated together in sequence, each sub-coil main body being provided with one lead-in end and one lead-out end, each sub-coil main body forming only one current path from the lead-in end to the lead-out end, and the flow directions of the current paths of each sub-coil main body being the same, all the lead-in ends being welded together to form a lead-in region located on the surface of the coil main body, and all the lead-out ends being welded together to form a lead-out region located on the surface of the coil main body, each sub-coil main body being wound independently, and the winding wire material of at least one sub-coil main body being different from that of other sub-coil main bodies, the lead-in end and the lead-out end of each sub-coil main body being formed as a part of the surface of the sub-coil main body where the lead-in end and the lead-out end are located, and the lead-in region and the lead-out region being formed as a part of the surface of the coil main body where the lead-in region and the lead-out region are located. A voice coil characterized by this.

2. The voice coil according to claim 1, wherein the sub-coil main bodies are laminated on top of each other to form the coil main body.

3. The voice coil according to claim 1, wherein the sub-coil main bodies are installed by being fitted inside and outside each other to form the coil main body.

4. The voice coil according to any one of claims 1 to 3, further comprising one lead-in wire and one lead-out wire connected to the coil main body, the lead-in wire being connected to the lead-in region, and the lead-out wire being connected to the lead-out region.

5. A sound generating device comprising the voice coil according to any one of claims 1 to 3.

6. Further comprising a flexible circuit board, the flexible circuit board including a mounting and fixing end and a free end extending from the mounting and fixing end, the free end being fixed to the voice coil, and the free end having two pads, one pad being connected to the lead-in region and the other pad being connected to the lead-out region. The sound generating device according to claim 5, characterized by this.

7. A sound generating device comprising the voice coil according to claim 4.

8. The sound emitting device according to claim 7, further comprising a conductive connection member, wherein the conductive connection member has two pads, the incoming wire is connected to one pad, and the outgoing wire is connected to the other pad.

Images