WO2022047859A1

WO2022047859A1 - Loudspeaker, voice coil, voice coil manufacturing method, and coil winding apparatus

Info

Publication number: WO2022047859A1
Application number: PCT/CN2020/117657
Authority: WO
Inventors: 吴崇灯; 陈俊; 顾月美; 黄博
Original assignee: 瑞声声学科技(深圳)有限公司; 瑞声光电科技(常州)有限公司
Priority date: 2020-09-02
Filing date: 2020-09-25
Publication date: 2022-03-10
Also published as: CN112040378B; CN112040378A

Abstract

Disclosed in the present invention are a loudspeaker, a voice coil, a voice coil manufacturing method, and a coil winding apparatus. The coil winding apparatus comprises a winding unit, a concealing unit, and a rotating unit; the winding unit comprises a mounting member, a wire winding shaft, and a first driver; a mounting hole is formed on one end of the mounting member; the wire winding shaft passes through the mounting hole; and the first driver is used for driving the wire winding shaft to reciprocatingly move with respect to a depth direction of the mounting hole; the concealing unit comprises a connection member, fitting members, and a second driver; the sides of all the fitting members are fitted with each other to form a sleeve hole; a relief space is provided between the sleeve hole and the connection member; the sleeve hole is in sleeve fit with the wire winding shaft, so that the fitting members are spaced apart from the mounting member to form a limiting space; the second driver drives the fitting members to move, so that the sleeve hole is opened or closed; the rotating unit can drive the wire winding shaft to rotate, or the rotating unit can drive the wire winding shaft and the fitting members to synchronously rotate around a center line of the wire winding shaft.

Description

Speaker, voice coil, voice coil manufacturing method and coil winding device

technical field

The present invention relates to the technical field, in particular to a loudspeaker, a voice coil, a method for making a voice coil and a coil winding device.

Background technique

A loudspeaker is a transducer device that converts an electrical signal into an acoustic signal. The voice coil is forced to move in a magnetic field in an electrified state, thereby driving the diaphragm to vibrate and generate sound.

At present, when a voice coil with at least two coils is made, after the first coil is wound, the second coil is wound above or below the first coil; and during the process of winding the second coil, The coils that have been wound will affect the coils that are newly wound later, resulting in irregular structures of the coils wound later, affecting the quality of the voice coil with at least two coils, which is not conducive to the improvement of speaker performance.

beneficial effect

Based on this, it is necessary to provide a speaker, a voice coil, a method for making a voice coil, and a coil winding device. The coil winding device can wind more than two coils, and can avoid the influence of the coils already wound on the newly wound coils later, which is beneficial to ensure the quality of the voice coil with at least two coils. The voice coil manufacturing method utilizes the coil winding device to avoid interference between coils during the winding process, which is beneficial to ensure the manufacturing quality of the voice coil having at least two coils. The voice coil is obtained by the above-mentioned manufacturing method of the voice coil, which can improve the quality and reduce the production cost. The speaker adopts the voice coil, which can reduce the production cost and improve the sound quality.

Its technical solutions are as follows:

In one aspect, the present invention provides a coil winding device, including a winding unit, a hidden unit and a rotating unit; the winding unit includes a mounting member, a winding shaft, and a first driver, one end of the mounting member is provided with a mounting hole, and the winding shaft Passing through the installation hole, and the first driver is used to drive the winding shaft to reciprocate relative to the depth direction of the installation hole; the hidden unit includes a connecting piece, at least two matching pieces, and a second driver, and all the matching pieces cooperate to form a sleeve There is an avoidance space between the sleeve hole and the connecting piece, and the sleeve hole is sleeved and matched with the winding shaft, so that the matching piece and the mounting piece are spaced to form a limit space, and the second driver drives at least one matching piece to move, so that the sleeve hole is opened or closed; the rotating unit can drive the spool to rotate, or the rotating unit can drive the spool and the fitting to rotate synchronously along the centerline of the spool.

When the above-mentioned coil winding device is in use, the second driver operates to make the sleeve hole open; then the first driver operates to move the winding shaft to the first preset position, and then closes the sleeve hole. One end of the metal wire is fixed on the bobbin, and the rotating unit acts to make the bobbin rotate or the bobbin and the fittings rotate synchronously along the center line of the bobbin, so that the metal wire is wound on the bobbin to form the first coil . After the first coil is obtained, the second driver operates again to open the sleeve hole, and the first driver operates to move the bobbin, so that the first coil moves out of the limiting space and is set in the avoidance space. Then close the sleeve hole, fix one end of the metal wire on the spool, and the rotating unit moves again to make the spool rotate or the spool and the fittings rotate synchronously along the center line of the spool, so that the metal wire is wound on the spool. Weave to form the second loop. In this way, in the reciprocating operation, at least two coils can be wound on the same bobbin, and the influence of the coils already wound on the newly wound coils can be avoided.

Further, on the winding shaft, after completing the winding of the preset number of coils, set all the coils in the limit space; then close the sleeve hole, so that the winding shaft moves, and the preset distance between adjacent coils is adjusted. , Since the coil itself is made of metal wire coated with glue, heating the bobbin can fix all the coils into a voice coil. In this way, utilizing the device of the present invention is advantageous in ensuring the quality of a voice coil having at least two coils.

The technical solution is further described below:

In one of the embodiments, each fitting is rotatable relative to the connecting piece; the number of fittings is in one-to-one correspondence with the number of second drivers, and one second driver drives one fitting to rotate; or the hidden unit further includes a linkage , the matching piece is rotatably arranged on the connecting piece, and the second driver drives all the matching pieces to rotate synchronously through the linking piece, so that the sleeve hole is opened or closed.

In one of the embodiments, one side of the fitting member is disposed toward the bobbin, and one side of the fitting member is provided with a concave surface for forming a sleeve hole, and the fitting member is further provided with a pressing end and a pressure bearing end arranged at intervals on both ends of the concave surface. When the concave surfaces of all the fittings are matched to form a sleeve hole, between two adjacent fittings, the pressing end of one fitting is abutted against the pressure-bearing end of the other fitting.

In one of the embodiments, the connecting member is provided with an accommodating hole for clearance fit with the bobbin, and the accommodating hole is arranged above the sleeve hole to form an escape space.

In one of the embodiments, each fitting can be automatically reset, so that one side of all fittings cooperate to form a socket.

In one of the embodiments, an elastic reset member is provided between two adjacent matching members, so that the matching member can be automatically reset; or the matching member can be elastically reset on the connecting member, so that the matching member can automatically reset.

In one embodiment, the rotating unit includes a first rotator and a second rotator, the first rotator is used to drive the spool to rotate, the second rotator is used to drive the fitting to rotate, and the first rotator and the second rotator are in phase with each other. Matching makes the bobbin and the fitting piece rotate synchronously along the center line of the bobbin.

On the other hand, the present invention also provides a method for manufacturing a voice coil, which utilizes the coil winding device in any of the above embodiments, and further includes the following steps:

Make the winding shaft move to the first preset position, and close the sleeve hole;

Fix one end of the metal wire on the bobbin, so that the metal wire is wound on the bobbin to form the first coil;

After obtaining the first coil, open the sleeve hole, move the winding shaft, and move the first coil out of the limit space;

Then, the sleeve hole is closed again, and one end of the metal wire is fixed on the bobbin, so that the metal wire is wound on the bobbin to form a second coil.

When using the above voice coil manufacturing method to make the voice coil, after the first coil is made, the first coil can be moved from the limit space to the avoidance space by using the bobbin to cooperate with the fitting, so that the first coil will not Affects the subsequent second coil made in the limited space. In this way, interference between coils in the winding process can be avoided, which is beneficial to ensure the production quality of the voice coil with at least two coils; at the same time, the yield rate in the production process of the voice coil can be improved, and the waste of materials and time can be reduced, which is conducive to reducing the The cost of making the voice coil.

The technical solution is further described below:

In one of the embodiments, after the winding of the second coil is completed, the following steps are further included:

Open the sleeve hole, move the winding shaft, and set the first coil in the limit space;

Close the sleeve hole and move the winding shaft to make the first coil and the second coil close to a preset distance;

The bobbin is then heated so that the first coil is bonded to the second coil to form a voice coil.

On the other hand, the present invention also provides a voice coil, which is obtained by using the voice coil manufacturing method in any of the above embodiments.

It can be seen from the above analysis that the voice coil is obtained by the above-mentioned method for manufacturing the voice coil, which can improve the quality and reduce the production cost.

In another aspect, the present invention also provides a loudspeaker comprising the above-mentioned voice coil.

The loudspeaker adopts the voice coil, which can reduce the production cost, avoid the interference between the coils during the winding process, ensure the winding quality of the coils, and help improve the sound quality.

Description of drawings

1 is a schematic structural diagram of a coil winding device in an embodiment;

Fig. 2 is the partial enlarged schematic diagram of A shown in Fig. 1;

3 is a schematic view of the sleeve hole of the coil winding device shown in FIG. 1 in an open state;

Fig. 4 is the partial enlarged schematic diagram of B shown in Fig. 3;

5 is a schematic front view of the coil winding device shown in FIG. 1;

Fig. 6 is the half-section schematic diagram of A-A shown in Fig. 5;

Fig. 7 is a partial enlarged schematic diagram of C shown in Fig. 6;

8 is a schematic structural diagram of a coil winding device in another embodiment;

FIG. 9 is a schematic bottom view of the coil winding device shown in FIG. 8;

Fig. 10 is the half-section schematic diagram of B-B shown in Fig. 9;

11 is a schematic side view of the coil winding device shown in FIG. 8;

FIG. 12 is a schematic half-sectional view of C-C shown in FIG. 11 .

Description of reference numbers:

100, winding unit; 110, mounting piece; 112, mounting hole; 120, winding shaft; 130, first driver; 200, hidden unit; 210, connecting piece; 212, accommodating hole; 220, fitting piece; 221, concave surface ; 222, pressing end; 223, bearing end; 230, second driver; 240, sleeve hole; 250, limiting space; 260, avoidance space; 300, rotating unit; 400, coil.

Brief description of the drawings

In order to illustrate the technical solutions in the embodiments of the present invention more clearly, the following briefly introduces the accompanying drawings used in the description of the embodiments. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can also be obtained from these drawings without creative effort.

Embodiments of the present invention

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

Unless otherwise defined, 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 terms used herein in the description of the present invention are for the purpose of describing specific embodiments only, and are not intended to limit the present 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 FIGS. 1 to 7 , the first embodiment provides a coil 400 winding device, including a winding unit 100 , a hidden unit 200 and a rotating unit 300 ; the winding unit 100 includes a mounting member 110 , a winding shaft 120 , and The first driver 130, one end of the mounting member 110 is provided with a mounting hole 112, the spool 120 is inserted through the mounting hole 112, and the first driver 130 is used to drive the spool 120 to reciprocate relative to the depth direction of the mounting hole 112; hidden The unit 200 includes a connecting piece 210 , at least two matching pieces 220 , and a second driver 230 . All the matching pieces 220 cooperate to form a sleeve hole 240 . An escape space 260 is provided between the sleeve hole 240 and the connecting piece 210 . The spool 120 is socketed and fitted so that the fitting 220 and the mounting member 110 are spaced apart to form a limiting space 250, and the second driver 230 drives at least one fitting 220 to move, so that the sleeve hole 240 is opened or closed; the rotating unit 300 can drive the spool 120 is rotated, or the rotating unit 300 can drive the spool 120 and the fitting 220 to rotate synchronously along the centerline of the spool 120 .

When the above-mentioned coil 400 winding device is in use, the second driver 230 operates to make the sleeve hole 240 open; then the first driver 130 operates to move the bobbin 120 to the first preset position, and then closes the sleeve hole 240 . One end of the metal wire is fixed on the spool 120 , the rotating unit 300 operates to rotate the spool 120 or the spool 120 and the fitting 220 rotate synchronously along the center line of the spool 120 , so that the metal wire is on the spool 120 The first coil 400 is formed by winding. After the first coil 400 is obtained, the second driver 230 operates again to open the sleeve hole 240, and the first driver 130 operates to move the bobbin 120, so that the first coil 400 moves out of the limiting space 250, and is set in a position to avoid in space 260. Then the sleeve hole 240 is closed again, and one end of the metal wire is fixed on the spool 120. The rotating unit 300 operates again to make the spool 120 rotate or the spool 120 and the fitting 220 rotate synchronously along the center line of the spool 120, so that the The metal wire is wound on the spool 120 to form the second coil 400 . In this way, in the reciprocating operation, at least two coils 400 can be wound on the same bobbin 120 , and the influence of the coils 400 already wound on the coils 400 that are newly wound later can be avoided.

Further, on the winding shaft, after completing the winding of the preset number of coils 400, all the coils 400 are set in the limiting space 250; then the sleeve hole 240 is closed, so that the winding shaft 120 is moved, and the adjacent coils 400 are adjusted. Since the coil itself is made of a metal wire coated with glue, heating the bobbin 120 can fix all the coils 400 into a voice coil. As such, utilizing the device of the present invention is advantageous in ensuring the quality of a voice coil having at least two coils 400 .

It should be noted that the "first drive 130" includes but is not limited to telescopic rods, telescopic plates, telescopic rods, pneumatic rods, hydraulic rods, linear motors and other power equipment that directly provide telescopic power, and also includes the use of rack and pinion mechanisms + motors , screw nut mechanism + motor and other devices that indirectly provide telescopic power to realize the reciprocating movement of the winding shaft 120 .

It should be noted that the "second driver 230" can be set according to the required movement mode of the fitting 220, including a robot operating arm, a telescopic device, a reciprocating moving device, a swing driving device, and the like.

Further, the "movement of the fitting member 220" includes rotation, movement, swing, etc., as long as the opening or closing of the sleeve hole 240 can be realized.

It should be noted that the rotating unit 300 includes equipment that directly provides rotating power, such as a servo motor and a rotating hydraulic cylinder, as well as other equipment that indirectly provides rotating power, such as a pneumatic rod + rack and pinion mechanism, a hydraulic rod + a crank-rocker mechanism or Crank-slider mechanism. All of the above can be implemented in the prior art, and details are not repeated here.

It should be noted that the "winding reel 120" and the "mounting member 110" can be arranged opposite to each other (as shown in Fig. 6), or they can be arranged on the same side (as shown in Fig. 10), that is, the "mounting member 110" can be arranged on the " It can be above or below the bobbin 120 ″, as long as the bobbin 120 can be inserted into the “installation hole 112 ”.

Specifically in this embodiment, as shown in FIG. 6 and FIG. 7 , the spool 120 is disposed below the mounting member 110 , the spool 120 can be moved upward and inserted into the mounting hole 112 , and the rotating unit 300 can drive the mounting member 110 to rotate, The mounting member 110 is connected with the bobbin 120 in a driving manner, and the bobbin 120 can be driven to rotate by rotating the mounting member 110, which is easy to implement.

On the basis of any of the above-mentioned embodiments, as shown in FIGS. 1 to 4 , in one embodiment, each fitting member 220 is rotatable relative to the connecting member 210 . In this way, the opening or closing of the sleeve hole 240 is realized by the rotation of the fitting member 220 .

Specifically, as shown in FIGS. 1 to 4 , in an embodiment, the number of the fittings 220 corresponds to the number of the second drivers 230 one-to-one, and one second driver 230 drives one fitting 220 to rotate. In this way, the synchronous rotation of the fitting member 220 is realized by the linkage control of the second driver 230 , and the opening or closing of the sleeve hole 240 is realized. For example, if the number of matching pieces 220 is three, the number of the second drivers 230 is also three, and one second driver 230 drives one matching piece 220 to rotate; in this way, three second drivers 230 work synchronously to achieve three The matching pieces 200 are rotated synchronously to realize the opening or closing of the sleeve holes 240 .

Or in another implementation, the hidden unit 200 further includes a linkage (not shown), the matching member 220 is rotatably disposed on the connecting member 210, and the second driver 230 drives all the matching members 220 to rotate synchronously through the linkage, so that the sleeve holes 240 on or off. In this way, the cooperation of the second driver 230 and the linkage member is used to realize the synchronous rotation of the matching member 220 , and to realize the synchronous opening or closing of the sleeve hole 240 . In this way, the linkage member is a flexible transmission member (such as a belt, a chain, etc.) and can synchronously drive all the matching members 220 to rotate, that is, the matching member 220 is provided with a matching portion that cooperates with the flexible transmission member, such as a pulley structure or a sprocket structure, and then The opening or closing of the sleeve hole 240 can be realized by using the linkage to realize the synchronous movement of all the matching parts 220 .

Of course, as shown in FIGS. 8 to 12 , in other embodiments, the fitting member 220 can be swingably disposed on the connecting member 210 . In this way, the opening or closing of the sleeve hole 240 is realized by the swinging of the fitting member 220 .

Specifically, as shown in FIGS. 10 and 12 , in one embodiment, one end of the fitting 220 is drivingly connected to the second driver 230 , and the other end of the fitting 220 is matched with the other end of the other fitting 220 to form a sleeve hole 240 . In this way, one end of the fitting 220 can be driven to swing by the second driver 230 , that is, the other end of the fitting 220 can also be swung to realize the opening or closing of the sleeve hole 240 .

At this time, the second driver 230 includes, but is not limited to, telescopic rods, telescopic plates, telescopic rods, pneumatic rods, hydraulic rods, linear motors, and other power equipment that directly provides telescopic power, and also includes a rack-and-pinion mechanism + motor, screw nut, etc. The mechanism + motor etc. indirectly provide telescopic power to realize the reciprocating swing of the fitting 220 .

Equivalently, the number of fittings 220 corresponds to the number of second drivers 230 one-to-one, and one second driver 230 drives one fitting 220 to swing, or the second driver 230 drives the fitting 220 to swing synchronously through the linkage.

On the basis of any of the above embodiments, as shown in FIG. 4 , in one embodiment, one side of the fitting 220 is disposed toward the bobbin 120 , and one side of the fitting 220 is provided with a concave surface 221 for forming the sleeve hole 240 , the fitting 220 is also provided with a pressing end 222 and a pressure-bearing end 223 arranged at both ends of the concave surface 221 at intervals; , the pressing end 222 of one of the fittings 220 abuts against the pressure-bearing end 223 of the other fitting 220 . In this way, the sleeve hole 240 is formed by the cooperation of the concave surface 221, which is convenient for close cooperation with the bobbin 120; at the same time, the limit structure is formed by the cooperation of the pressing end 222 and the pressure bearing end 223 of the other fitting 200, and the mechanical limit is directly used. To avoid over-rotation of the fitting 200, the repositioning of the sleeve hole 240 is unreliable or the repositioning of the sleeve hole 240 is too small to squeeze the spool 120 and damage the outer surface of the spool 120, so that the cooperation between the fittings 200 is more reliable. .

The specific implementation of the “avoidance space 260 ” can be various, for example, the connecting member 210 and the fitting member 220 are spaced apart to form the avoidance space 260 (as shown in FIG. 2 , FIG. 4 , and FIG. 5 ). Or on the basis of any of the above-mentioned embodiments, as shown in FIG. 10 , in one embodiment, the connecting member 210 is provided with an accommodating hole 212 for clearance fit with the bobbin 120 , and the accommodating hole 212 is arranged above the sleeve hole 240 to form a space for avoidance. Space 260.

On the basis of any of the above embodiments, as shown in FIG. 10 and FIG. 12 , in one embodiment, each fitting 220 can be automatically reset, so that one side of all fittings 220 cooperates to form a sleeve 240 . In this way, the second driver 230 only needs to provide the power to open the sleeve hole 240, so as to avoid the second driver 230 being powered on all the time and wasting electricity costs.

It should be noted that the "automatic reset" of "each fitting 220 can be reset automatically" can be implemented by any existing technology that meets the usage requirements, such as elastic reset or gravity automatic reset or magnetic automatic reset.

Specifically in this embodiment, an elastic reset member is provided between two adjacent matching members 220, so that the matching member 220 can be automatically reset; or the matching member 220 can be elastically reset on the connecting member 210, so that the matching member 220 can automatically reset reset. In this way, the automatic reset of the fitting 220 is realized by using the elastic automatic reset technology. During this process, an elastic restoring force can be set between the fitting 220 and the fitting 220, and an elastic reset can also be set between the fitting 220 and the connecting piece 210. force.

On the basis of any of the above embodiments, in one embodiment, the rotating unit 300 includes a first rotator (not shown) and a second rotator (not shown), the first rotator is used to drive the spool 120 to rotate, The second rotator is used to drive the matching piece 220 to rotate, and the first rotator cooperates with the second rotator, so that the spool 120 and the matching piece 220 rotate synchronously along the center line of the spool 120 . In this way, the synchronous rotation of the bobbin 120 and the fitting 220 is realized by the linkage control of the first rotator and the second rotator, so as to realize the winding of the metal wire, so as to obtain the corresponding coil 400 . At the same time, the spool 120 and the fitting member 220 rotate synchronously, which is beneficial to reduce the direct wear of the two, and helps to improve the service life of the spool 120 .

In the second embodiment, a method for manufacturing a voice coil is also provided, which utilizes the coil winding device in any of the above-mentioned embodiments, and further includes the following steps:

On the basis of the above embodiment, in one embodiment, after the winding of the second coil is completed, the following steps are further included:

In this way, after the winding of the second coil is completed, the device of the present invention can also realize the adjustment of the distance between the first coil and the second coil, so as to facilitate heating and fixing into a voice coil. In this process, since the coil itself is made of metal wire coated with glue, there is no need to apply glue again; and the coil can be bonded and fixed into a voice coil without transferring the coil, which can avoid the coil being transferred during the transfer process. Structural deviation occurs, which is conducive to ensuring the quality of the voice coil.

It should be noted that the "preset distance" can be adjusted according to the performance requirements of the voice coil, which belongs to the prior art and will not be repeated here.

In the third embodiment, a voice coil is also provided, which is obtained by using the voice coil manufacturing method in any of the above-mentioned embodiments.

Embodiment 4 also provides a speaker, including the above voice coil.

It should be noted that, equivalently, "a certain body" and "a certain part" can be a part of the corresponding "component", that is, "a certain body", "a certain part" and the "other parts of the component" are integrally formed; or An independent component that can be separated from "other parts of the component", that is, "a body" and "a part" can be manufactured independently, and then combined with the "other parts of the component" to form a whole. The expression of the above-mentioned "some body" and "a certain part" in the present invention is only one of the embodiments, for the convenience of reading, rather than limiting the scope of protection of the present invention, as long as the above features are included and the functions are the same, it should be understood as Equivalent technical solutions of the present invention.

It should be noted that, equivalently, the components included in the "unit", "component", "mechanism" and "device" of the present invention can also be combined flexibly, and modular production can be carried out according to actual needs to facilitate modularization. assembled. The division of the above-mentioned components in the present invention is only one of the embodiments, for the convenience of reading, rather than limiting the scope of protection of the present invention, as long as the above-mentioned components are included and have the same function, it should be understood as an equivalent technical solution of the present invention.

In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", " Back, Left, Right, Vertical, Horizontal, Top, Bottom, Inner, Outer, Clockwise, Counterclockwise, Axial , "radial", "circumferential" and other indicated orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying the indicated device or Elements must have a particular orientation, be constructed and operate in a particular orientation and are therefore not to be construed as limitations of the invention.

In addition, the terms "first" and "second" are only used for descriptive purposes, and should not be construed as indicating or implying relative importance or implying the number of indicated technical features. Thus, a feature delimited with "first", "second" may expressly or implicitly include at least one of that feature. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise expressly and specifically defined.

In the present invention, unless otherwise expressly specified and limited, the terms "installed", "connected", "connected", "fixed" and other terms should be understood in a broad sense, for example, it may be a fixed connection or a detachable connection , or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between the two elements, unless otherwise specified limit. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

In the present invention, unless otherwise expressly specified and limited, a first feature "on" or "under" a second feature may be in direct contact between the first and second features, or the first and second features indirectly through an intermediary touch. Also, the first feature being "above", "over" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is level higher than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature has a lower level than the second feature.

It should be noted that when an element is referred to as being "fixed on", "disposed on", "fixed on" or "mounted on" another element, it can be directly on the other element or an intervening element 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. Further, when one element is considered to be a "fixed transmission connection" to another element, the two can be fixed in a detachable connection, or can be fixed in a non-detachable connection, as long as power transmission can be achieved, such as socket connection, snap connection. , integral molding fixing, welding, etc., can be realized in the prior art, and will not be redundant here. When a component and another component are perpendicular or approximately perpendicular to each other, it means that the ideal state of the two is vertical, but due to the influence of manufacturing and assembly, there may be a certain vertical error. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for the purpose of illustration only and do not represent the only embodiment.

The technical features of the above embodiments can be combined arbitrarily. In order to make the description simple, all possible combinations of the technical features in the above embodiments are not described. However, as long as there is no contradiction in the combination of these technical features It is considered to be the range described in this specification.

The above examples only represent several embodiments of the present invention, and the descriptions thereof are specific and detailed, but should not be construed as a limitation on the scope of the invention patent. It should be pointed out that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can also be made, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention should be subject to the appended claims.

Claims

A coil winding device, characterized in that it includes:

A winding unit, the winding unit includes a mounting piece, a winding shaft, and a first driver, one end of the mounting piece is provided with a mounting hole, the winding shaft is penetrated in the mounting hole, and the first The driver is used to drive the bobbin to reciprocate relative to the depth direction of the installation hole;

A hidden unit, the hidden unit includes a connecting piece, at least two matching pieces, and a second driver, all the matching pieces cooperate to form a sleeve hole, and an escape space is provided between the sleeve hole and the connecting piece, so The sleeve hole is sleeved and matched with the bobbin, so that the matching piece and the mounting piece are spaced to form a limit space, and the second driver drives at least one of the matching pieces to move, so that the sleeve hole is opened or closed; and

A rotating unit, the rotating unit can drive the bobbin to rotate, or the rotating unit can drive the winding unit and the hidden unit to rotate synchronously around the center line of the bobbin.
The coil winding device according to claim 1, wherein each of the fittings is rotatable relative to the connecting member; the number of the fittings corresponds to the number of the second drivers one-to-one, and One of the second drivers drives a matching piece to rotate; or the hidden unit further includes a linking piece, the matching piece is rotatably arranged on the connecting piece, and the second driver drives all the matching pieces through the linking piece The parts rotate synchronously so that the sleeve holes are opened or closed.
The coil winding device according to claim 2, wherein one side of the matching member is disposed toward the bobbin, and one side of the matching member is provided with a concave surface for forming the sleeve hole, so The fittings are also provided with a pressing end and a pressure-bearing end that are arranged at intervals on both ends of the concave surface; when the concave surfaces of all the fittings are matched to form the sleeve holes, the gap between the two adjacent fittings is , the pressing end of one of the fittings abuts against the pressure-bearing end of the other fitting.
The coil winding device according to claim 1, wherein the connecting member is provided with an accommodating hole for clearance fit with the bobbin, and the accommodating hole is provided above the sleeve hole to form the avoidance space .
The coil winding device according to claim 1, wherein each of the fittings can be automatically reset, so that one side of all the fittings cooperates to form the sleeve hole.
The coil winding device according to claim 5, wherein an elastic reset member is arranged between two adjacent matching members, so that the matching member can be automatically reset; or the matching member can be elastically reset and set on the connecting piece, so that the fitting piece can be automatically reset.
The coil winding device according to any one of claims 1 to 6, wherein the rotating unit comprises a first rotator and a second rotator, and the first rotator is used to drive the winding shaft to rotate, The second rotator is used to drive the matching piece to rotate, and the first rotator is matched with the second rotator, so that the winding shaft and the matching piece rotate synchronously along the center line of the winding shaft .
A method for making a voice coil, characterized in that the coil winding device according to any one of claims 1 to 7 is adopted, further comprising the steps of:

Make the winding shaft move to the first preset position, and close the sleeve hole;

One end of the metal wire is fixed on the bobbin, so that the metal wire is wound on the bobbin to form a first coil;

After the first coil is obtained, the sleeve hole is opened, the winding shaft moves, and the first coil is moved out of the limiting space;

Then, the sleeve hole is closed again, and one end of the metal wire is fixed on the bobbin, so that the metal wire is wound on the bobbin to form a second coil.
The voice coil manufacturing method according to claim 8, characterized in that, after completing the winding of the second coil, the method further comprises the following steps:

Open the sleeve hole, move the winding shaft, and set the first coil in the limiting space;

Close the sleeve hole and move the winding shaft to make the first coil and the second coil close to a preset distance;

The bobbin is then heated so that the first coil and the second coil are bonded and fixed to form a voice coil.
A voice coil is characterized in that, it is obtained by adopting the method for manufacturing a voice coil according to claim 8 or 9.
A loudspeaker is characterized by comprising the voice coil as claimed in claim 10 .