WO2021098445A1

WO2021098445A1 - Voice coil, speaker, and manufacturing method for voice coil

Info

Publication number: WO2021098445A1
Application number: PCT/CN2020/123468
Authority: WO
Inventors: 孙志军; 牛家鹏; 牟宗君
Original assignee: 歌尔股份有限公司
Priority date: 2019-11-19
Filing date: 2020-10-24
Publication date: 2021-05-27
Also published as: CN110856083A; CN110856083B

Abstract

The present invention relates to a voice coil, a speaker, and a manufacturing method for a voice coil. The voice coil comprises a voice coil body formed by winding an enameled wire, a start line terminal, and an end line terminal; the voice coil body is provided with a start line line-out position and an end line line-out position, the start line terminal is led out from the start line line-out position, and the end line terminal is led out from the end line line-out position; the start line line-out position and the end line line-out position are located at any position in the middle of the voice coil body; and the height of the voice coil body is formed as the height of the voice coil. The present invention effectively avoids the problem in conventional winding means in which a voice coil is provided with an additional layer of wire diameter height due to lines being led out at two terminals of a start line, reduces the occupation of a vibration space by winding, prevents the voice coil from rubbing against zero devices such as a frame, improves the stability and durability of the voice coil, and has an excellent acoustic effect.

Description

Voice coil, speaker and method of making voice coil

Technical field

The invention relates to the technical field of loudspeaker products, and more specifically, to a voice coil, a loudspeaker and a manufacturing method of the voice coil.

Background technique

A speaker is a device that can convert electrical signals into sound signals, and is widely used in electronic devices such as mobile phones and tablet computers. It is mainly composed of magnets, diaphragms, voice coils and other components. Among them, the voice coil is the vibration source of the speaker vibration system, which has a very important influence on the sensitivity and frequency response of the speaker.

The voice coil is usually surrounded by a stack of enameled wires, and one end is connected to the diaphragm. When the speaker is working, a changing current will flow through the enameled wire of the voice coil, and the voice coil will move in a piston-like manner under the action of the electromagnetic field, thereby driving The diaphragm reciprocates, and then pushes the surrounding air movement to emit sound waves.

The existing voice coil is generally wound from the inside to the outside. After the winding is completed, the starting line outlet position 5'must be drawn from above or below the voice coil body 7', so that there is one more starting line in the longitudinal height direction. The height of the wire diameter makes the total height of the voice coil higher, as shown in Figures 3 and 4. At present, the total height of micro speakers for many electronic products is about 2-4mm. The voice coil, magnetic circuit, diaphragm components, glue layer, etc. are closely arranged in a tiny space. The vibration space of the voice coil is about 0.4-0.8mm. However, the height of an enameled wire diameter of the speaker is 0.05mm-0.2mm, which occupies 10-20% of the vibration space, which reduces the vibration space, prone to rubbing and causing poor acoustic performance.

Summary of the invention

In order to solve the above technical problems, the present invention provides a voice coil, a speaker, and a method for manufacturing a voice coil, which can solve the problem of the initial wire exiting in the existing winding method, reduce the occupation of the vibration space by the winding, and improve the speaker's performance. Acoustic effect.

In order to achieve the above objective, the present invention provides a voice coil. The voice coil includes a voice coil body made of enameled wire, a start wire end and a terminal wire end. The voice coil body is provided with a start wire outlet position and a final wire outlet position. , The starting wire end is drawn from the starting wire outlet position, the ending wire end is drawn from the ending wire outlet position, the starting wire outlet position and the ending wire outlet position are located at any position in the middle of the voice coil body, the voice coil The height of the body is formed as the height of the voice coil.

Optionally, the starting position and the ending position of the enameled wire are located on the same plane.

Further optionally, the starting and ending positions of the enameled wire are both located at half the height of the voice coil.

Optionally, the starting position and the ending position of the enameled wire are located on different planes.

Optionally, the voice coil is provided in at least two layers, and the number of turns of the voice coils of two adjacent layers is different.

Further optionally, the number of turns of two adjacent layers of voice coils differs by one turn.

Optionally, the voice coil is wound by self-adhesive direct welding enameled wire, and the enameled wire is copper enameled wire, copper alloy enameled wire or copper clad aluminum enameled wire.

The present invention also provides a loudspeaker including a magnetic circuit system and a vibration system. The vibration system includes a diaphragm and the aforementioned voice coil. The voice coil is fixed on one side of the diaphragm, and the start line end and the end line The terminal is led out from any position in the middle of the voice coil body and connected with the peripheral circuit to feed in electrical signals.

Optionally, the vibration system is provided with at least two sets of voice coils.

At the same time, the present invention also provides a method for manufacturing a voice coil, wherein the voice coil is wound by enameled wire, and the enameled wire is provided with a start end and an end end, and the following steps are specifically adopted for winding:

A. Before the start of the winding, reserve a part of the length of the starting end, and then set the starting position of the winding of the voice coil;

B. The beginning of the winding starts from the winding start position, until the completion of the first layer of voice coil, the winding end position of the first layer of voice coil is recorded as the winding end position;

C. The start and end ends are stacked between the start position and the end position of the winding to form the voice coil body, the start end is finally led out from the start line outlet position; the end line ends finally from the end line outlet position Leading out, the start line outlet position and the end line outlet position are located at any positions in the middle of the voice coil body, and the height of the voice coil body is formed as the voice coil height, thereby completing the production of the voice coil.

The technical solution of the present invention is to set the start line outlet position and the end line outlet position at the middle position of the voice coil height, which effectively avoids the problem of the voice coil having an extra layer of wire diameter when the two ends of the start line exit in the existing winding method. The problem is to reduce the occupation of the vibration space by the winding, prevent the voice coil and the frame and other components from rubbing, the stability and durability of the voice coil are improved, and the acoustic effect is more excellent. On the contrary, if the vibration space is kept unchanged, the middle wire outlet method is more than the two ends, the voice coil coil is wound with more turns, the overall wire length of the voice coil increases, and the thickness of the magnet is eliminated due to the problem of the space occupied by the initial wire outlet. , It can be further thickened, and the interaction between the coil and the magnet is enhanced, so that the electromechanical coupling factor BL(x) of the speaker is improved. At the same time, the increase of the voice coil wire length and the increase of the thickness of the magnet will increase the overall weight of the speaker. The frequency F0 is reduced, and the low frequency performance of the speaker is improved.

Description of the drawings

In order to explain the embodiments of the present invention or the technical solutions in the prior art more clearly, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only These are some embodiments of the present invention. For those of ordinary skill in the art, without creative work, other drawings can be obtained based on the structure shown in these drawings.

Figure 1 is a schematic flow chart of a voice coil manufacturing method according to an embodiment of the application

Figure 2 is a schematic diagram of the application voice coil winding method

Fig. 3 is a cross-sectional view of a winding structure of an existing voice coil;

Figure 4 is a schematic diagram of the existing voice coil winding method

In the figure, 1-winding start position, voice coil body, 2-winding end position, 3-end wire exit position, 4-end wire end, 5-start wire exit position, 6-start wire end, 7-voice coil body 3'- End line exit position 5'-start line exit position 7'-voice coil body.

Detailed ways

In order to make the objectives, technical solutions, and effects of the present invention clearer and clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, but not to limit the present invention.

The present invention provides a voice coil, a loudspeaker, and a manufacturing method of the voice coil, as shown in Figures 1 and 2.

A voice coil. The voice coil includes a voice coil body 7, a starting wire end 6 and a terminal wire end 4 made of enameled wire. The voice coil body 7 is provided with a starting wire outlet position 5 and a final wire outlet position 3. The start line end 6 is led out from the start line exit position 5, the end line end 4 is led out from the end line exit position 3, the start line exit position 5 and the end line exit position 3 are located anywhere in the middle of the voice coil body 7 The height of the voice coil body 7 is formed as the height of the voice coil.

In one embodiment, the start line exit position 5 and the end line exit position 3 of the enameled wire are located on the same plane, and the wires can be drawn out in parallel, or they can be drawn out separately from different positions on the same plane. Preferably, the starting position 5 and the ending position 3 of the enameled wire are both located at half the height of the voice coil.

In another embodiment, the start wire outlet position 5 and the end wire outlet position 3 of the enameled wire are located on different planes, and the respective outlet positions can be reasonably arranged according to the internal structure of the speaker.

In a preferred embodiment, the voice coil is provided with at least two layers to ensure that the enameled wire can be drawn from the middle of the height of the voice coil. The number of turns of the two adjacent layers of voice coils is different, and the two adjacent layers of voice coils can be arranged in a hollow arrangement; The number of turns can be alternately set in a way that the odd-numbered layers and even-numbered layers are one turn apart, or it can gradually decrease from the inside to the outside.

In another preferred embodiment, the voice coil is wound by self-adhesive direct welding enameled wire, and the enameled wire is copper enameled wire, copper alloy enameled wire or copper clad aluminum enameled wire.

At the same time, the present invention provides a loudspeaker including a magnetic circuit system and a vibration system. The vibration system includes a diaphragm and the aforementioned voice coil. The voice coil is fixed on one side of the diaphragm. The terminal 4 is drawn from any position in the middle of the voice coil body and connected to the peripheral circuit to feed in electrical signals. In a preferred embodiment, the vibration system is provided with at least two sets of voice coils.

The present invention also provides a method for manufacturing a voice coil. The voice coil is wound by enameled wire. The enameled wire is provided with a start end 6 and an end end 4, and the following steps are specifically adopted for winding:

A. Before the winding starts, reserve a part of the length of the starting end 6 in advance, and then set the winding starting position 1 of the voice coil;

B. The starting wire end 6 is wound from the winding start position 1 until the first layer of voice coil is completed. The winding end position of the first layer of voice coil is recorded as the winding end position 2;

C. The start wire end 6 and the end wire end 4 are each reciprocally stacked between the winding start position 1 and the winding end position 2 to form the voice coil body 7, and the start wire end is finally led out from the start wire outlet position 5; the end wire end Finally, it is led out from the end line outlet position 3. The start line outlet position 5 and the end line outlet position 3 are located at any position in the middle of the voice coil body 7. The height of the voice coil body 7 is formed as the height of the voice coil, thereby completing the voice The making of the circle.

In the above steps, by reserving a part of the enameled wire as the start end winding, it is ensured that the start line can be drawn from the middle position of the voice coil height; the start line end 6 and the end line end 4 are in the winding start position 1 and the end line The outlet position 2 is stacked reciprocally, and the two lines can be freely selected to intersect or disjoint; and the outlet position can be arbitrarily selected from the middle part, so that the voice coil can flexibly match the arrangement of other components inside the speaker, and the structure layout is more reasonable .

The above technical solution sets the starting wire outlet position 6 and the ending wire outlet position 4 at the middle position of the voice coil height, which effectively avoids the existing winding method of the original wire winding at both ends of the wire leading to the voice coil with an extra layer of wire diameter height. The problem is to reduce the occupation of the vibration space by the winding, prevent the voice coil and the frame and other components from rubbing, the stability and durability of the voice coil are improved, and the acoustic effect is more excellent.

On the contrary, if the vibration space is kept unchanged, the middle wire outlet method is more than the two ends, the voice coil coil is wound with more turns, the overall wire length of the voice coil increases, and the thickness of the magnet is eliminated due to the problem of the space occupied by the initial wire outlet. , It can be further thickened, and the interaction between the coil and the magnet is enhanced, so that the electromechanical coupling factor BL(x) of the speaker is improved. At the same time, the increase of the voice coil wire length and the increase of the thickness of the magnet will increase the overall weight of the speaker. The frequency F0 is reduced, and the low frequency performance of the speaker is improved. In a more specific embodiment, when the voice coil is wired at both ends, the voice coil body is formed by alternately arranging 7 turns and 6 turns from the inside to the outside, and the middle outlet method is adopted, which can be used from the inside to the outside. With the structure of 8 circles and 7 circles alternately arranged, when the number of layers is 6 layers, the difference in arrangement makes BL(x) increase by 14%.

The foregoing descriptions are only optional embodiments of the present invention, and do not limit the scope of the present invention. Under the inventive concept of the present invention, equivalent structural transformations made by using the contents of the description and drawings of the present invention, or direct/indirect Applications in other related technical fields are included in the scope of patent protection of the present invention.

Claims

A voice coil, which is characterized in that it comprises a voice coil body made of enameled wire, a start wire end and a terminal wire end. The voice coil body is provided with a start wire outlet position and a final wire outlet position. The start wire end It is led out from the starting line outlet position, the end line end is led out from the end line outlet position, the starting line outlet position and the end line outlet position are located at any position in the middle of the voice coil body, and the height of the voice coil body is formed as a voice coil. Circle height.
The voice coil according to claim 1, wherein the starting position and the ending position of the enameled wire are located on the same plane.
The voice coil according to claim 2, characterized in that the starting position and the ending position of the enameled wire are both located at half the height of the voice coil.
The voice coil according to claim 1, wherein the starting position and the ending position of the enameled wire are located on different planes.
The voice coil according to claim 1, wherein the voice coil is provided with at least two layers, and the number of turns of the two adjacent layers is different.
The voice coil according to claim 5, wherein the number of turns of two adjacent layers of voice coils differs by one turn.
The voice coil according to claim 1, wherein the voice coil is wound by self-adhesive direct welding enameled wire, the enameled wire is copper enameled wire, copper alloy enameled wire or copper clad aluminum enameled wire.
A loudspeaker comprising a magnetic circuit system and a vibration system, the vibration system comprising a diaphragm and the voice coil according to any one of claims 1-7, the voice coil is fixed on one side of the diaphragm, and the start line end and The terminal wire end is drawn from any position in the middle of the voice coil body to be connected to a peripheral circuit to feed an electric signal.
The speaker according to claim 8, the vibration system is provided with at least two sets of voice coils.
A method for manufacturing a voice coil, wherein the voice coil is wound by enameled wire, and the enameled wire is provided with a start wire end and an end wire end, and the following steps are specifically adopted for winding:

A. Before the start of the winding, reserve a part of the length of the starting end, and then set the starting position of the winding of the voice coil;

B. The beginning of the winding starts from the winding start position, until the completion of the first layer of voice coil, the winding end position of the first layer of voice coil is recorded as the winding end position;

C. The start and end ends are stacked between the start position and the end position of the winding to form the voice coil body, the start end is finally led out from the start line outlet position; the end line ends finally from the end line outlet position Leading out, the start line outlet position and the end line outlet position are located at any positions in the middle of the voice coil body, and the height of the voice coil body is formed as the voice coil height, thereby completing the production of the voice coil.