WO2022047866A1

WO2022047866A1 - Coil winding apparatus and bobbin

Info

Publication number: WO2022047866A1
Application number: PCT/CN2020/117794
Authority: WO
Inventors: 朱学园; 张国建; 陈俊; 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: CN112053846A; CN112053846B

Abstract

A coil winding apparatus and a bobbin (120), the coil winding apparatus comprising a winding unit (100), a winding assistance unit (200), and a rotation unit (300); the winding unit (100) comprises a mounting member (110), a bobbin (120), and a first driver (130), one end of the mounting member (110) being provided with a mounting hole (112), the bobbin (120) passing through the mounting hole (112), and the first driver (130) being used for driving the bobbin (120) to make a reciprocating movement relative to the direction of depth of the mounting hole (112); the winding assistance unit (200) comprises a connecting member (210), engaging members (220), and a second driver (230), one side of all of the engaging members (220) being engaged to form a sleeve hole (240), an avoidance space (260) being provided between the sleeve hole (240) and the connecting member (210), the sleeve hole (240) having a sleeve fit with the bobbin (120) such that the engaging members (220) and the mounting member (110) are spaced apart to form a limiting space (250), and the second driver (230) driving the engaging members (220) to move so that the sleeve hole (240) opens or closes; and the rotation unit (300) can drive the bobbin (120) to rotate or the rotation unit (300) can drive the bobbin (120) and the engaging members (220) to rotate synchronously along the centre line of the bobbin (120).

Description

Coil winding device and winding shaft

technical field

The invention relates to the technical field of voice coil manufacturing, in particular to a coil winding device and a winding shaft.

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 manufactured, after the first coil is wound on the bobbin, other coils need to be wound on the bobbin, and finally the wound coils are tightly attached to the bobbin. Glue and fix. During this process, it is necessary to re-insert the wound coil into the bobbin or adjust the position on the bobbin, but the cooling and shrinkage of the wound coil will cause a transition fit with the bobbin, resulting in the wounded coil. When the coil is re-inserted into the bobbin or the position is adjusted on the bobbin, the structure of the coil is prone to shift, resulting in a low yield of the voice coil.

beneficial effect

Based on this, it is necessary to provide a coil winding device and a winding shaft. The bobbin can assist in the winding of the coil and the bonding and fixing of a preset number of coils, and when the coil that has been wound is re-inserted into the bobbin or the position is adjusted on the bobbin, the structure of the coil is not easy to be biased. It is beneficial to improve the yield rate of voice coil production. The coil winding device adopts the bobbin, which can reduce the structural deviation during the movement of the coil, and is beneficial to improve the yield of the voice coil.

Its technical solutions are as follows:

In one aspect, the present invention provides a bobbin, comprising a first body for connection, a second body for auxiliary winding, and a third body for auxiliary bonding, one end of the second body is fixed to the first body , the other end of the second body is fixed with the third body; wherein the cross section of the second body is similar to that of the third body, and the area of the cross section of the second body is larger than that of the third body.

When the above bobbin is used in the production of voice coils, the coil can be wound through the second body, and the wound coil can be moved on the second body; and when the coil needs to be bonded and fixed, the third body can be used to carry the load The coil that has already been made, because the cross-sectional area of the third body is smaller than the cross-section of the second body, it is convenient to insert the coil that has been made into the third body or move on the third body. The structure is not easy to be offset; at the same time, by moving the coil on the second body, the coils on the third body and the second body are closely attached to each other. Since the metal wire itself is coated with glue, the third body can be heated after heating. The coils on the body and the second body are fixed to form a voice coil. In this way, the bobbin can assist in the winding of the coil and the bonding and fixing of a preset number of coils, and the coil structure is not easy when the coil that has been wound is re-inserted into the bobbin or the position is adjusted on the bobbin. Offset occurs, which is beneficial to improve the yield of voice coil production.

The technical solution is further described below:

In one embodiment, the cross section of the second body and the cross section of the third body are both circular, and the diameter of the cross section of the second body is larger than the diameter of the cross section of the third body.

In one of the embodiments, the free end of the third body is provided with an introduction portion, and the introduction portion is a rounded corner structure or an inverted cone angle structure.

On the other hand, the present invention provides a coil winding device, including a winding unit, a winding auxiliary unit and a rotating unit; the winding unit includes a mounting member, a winding shaft, and a first driver, and one end of the mounting member is provided with a mounting hole , the winding shaft is penetrated in 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 winding auxiliary unit is provided with a sleeve hole, and the sleeve hole is sleeved and matched with the winding shaft, so that the winding The auxiliary unit and the mounting piece are arranged at intervals to form a limiting space; the rotating unit can drive the winding shaft to rotate, or the rotating unit can drive the centerline of the winding unit and the winding auxiliary unit to rotate synchronously.

When the above-mentioned coil winding device is in use, the first driver is actuated to move the winding shaft to the first preset position. One end of the metal wire is fixed on the bobbin, and the rotating unit acts to rotate the bobbin, so that the metal wire is wound on the bobbin to form the first coil. After the first coil is obtained, the first driver acts to move the winding shaft, so that the first coil moves out of the limiting space. Then, one end of the metal wire is fixed on the bobbin, and the rotating unit operates again to make the bobbin rotate, so that the metal wire is wound on the bobbin to form a second coil. In this way, after reciprocating operation, after obtaining a preset number of coils, when the coils need to be bonded and fixed, the third body can be used to carry the coils that have already been made, because the cross-sectional area of the third body is smaller than that of the second body. The cross section is convenient to insert the coil that has already been made into the third body or move on the third body. During this process, the structure of the coil is not easy to shift; at the same time, by moving the coil on the second body, the third body is Since the metal wire itself is coated with glue, the coils on the third body and the second body can be fixed into a voice coil after heating. In this way, the coil winding device adopts the bobbin, which can reduce the structural deviation during the movement of the coil, which is beneficial to improve the yield of the voice coil.

The technical solution is further described below:

In one embodiment, the winding auxiliary unit includes a connecting piece, at least two fitting pieces, and a second driver, all the fitting pieces cooperate to form a sleeve hole, an escape space is provided between the sleeve hole and the connecting piece, and the sleeve hole is connected to the connecting piece. The bobbin is sleeved and matched, so that the fitting piece and the mounting piece are spaced apart to form a limiting space, and the second driver drives at least one fitting piece to move, so that the sleeve hole is opened or closed.

In this way, 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 close the sleeve hole. One end of the metal wire is fixed on the spool, and the rotating unit acts 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 to form the first coil. After the first coil is obtained, the second driver acts again to open the sleeve hole, and the first driver acts to move the winding shaft, so that the first coil moves out of the limit space, and is arranged in the avoidance space and is arranged on the third body superior. 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. , and finally heat all the coils and fix them 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.

In one of the embodiments, each fitting is rotatable relative to the connecting piece; the number of fittings corresponds to the number of second drivers, and one second driver drives one fitting to rotate; or the winding auxiliary unit further comprises: The linking 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.

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 sectional schematic diagram of A-A shown in Fig. 5;

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

FIG. 8 is a schematic structural diagram of the bobbin shown in FIG. 6;

9 is a schematic front view of the bobbin shown in FIG. 8;

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

FIG. 11 is a schematic bottom view of the coil winding device shown in FIG. 10;

Figure 12 is a schematic cross-sectional view of B-B shown in Figure 11;

Figure 13 is a schematic side view of the coil winding device shown in Figure 10;

FIG. 14 is a schematic cross-sectional view of C-C shown in FIG. 13 .

Description of reference numbers:

100, winding unit; 110, mounting piece; 112, mounting hole; 120, winding shaft; 122, first body; 124, second body; 126, third body; 128, introduction part; 130, first driver; 200, winding auxiliary 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, Avoiding 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 9 , the first embodiment provides a coil winding device, including a winding unit 100 , a winding auxiliary unit 200 and a rotation unit 300 .

The winding unit 100 includes a mounting member 110, a bobbin 120, and a first driver 130. One end of the mounting member 110 is provided with a mounting hole 112, and the bobbin 120 passes through the mounting hole 112. The first driver 130 is used for driving the winding. The bobbin 120 reciprocates with respect to the depth direction of the mounting hole 112 .

The winding auxiliary unit 200 is provided with a sleeve hole 240 , and the sleeve hole 240 is sleeved and matched with the winding shaft 120 , and the winding auxiliary unit 200 is spaced from the mounting member 110 to form a limiting space 250 .

The rotating unit 300 can drive the spool 120 to rotate, or the rotating unit 300 can drive the spool 120 and the fitting 220 to rotate synchronously along the center line of the spool 120 .

Wherein, as shown in FIGS. 6 to 9 , the bobbin 120 includes a first body 122 for connection, a second body 124 for auxiliary winding, and a third body 126 for auxiliary bonding. The second body 124 One end of the second body 124 is fixed to the first body 126, and the other end of the second body 124 is fixed to the third body 126; wherein, the cross-section of the second body 124 is similar to that of the third body 126, and the cross-section of the second body 124 The area is larger than the cross section of the third body 126 .

When the above-mentioned coil winding device is in use, the first driver 130 is actuated, so that the winding shaft 120 is moved to the first preset position. One end of the metal wire is fixed on the bobbin 120 , and the rotating unit 300 operates to rotate the bobbin 120 , so that the metal wire is wound on the bobbin 120 to form the first coil 400 . After the first coil 400 is obtained, the first driver 130 operates to move the bobbin 120 so that the first coil 400 moves out of the limiting space. Then, one end of the metal wire is fixed on the spool 120 , and the rotating unit 300 operates again to rotate the spool 120 , so that the metal wire is wound on the spool 120 to form the second coil 400 . In this way, after the reciprocating operation, after obtaining the preset number of coils 400, when the coils 400 need to be bonded and fixed, the third body 126 can be used to carry the coils 400 that have already been produced, because the cross-sectional area of the third body 126 is smaller than The cross section of the second body 124 is convenient for the coil 300 that has been fabricated to be inserted into the third body 126 or moved on the third body 126. During this process, the structure of the coil 400 is not easily displaced; The coils on the second body 124 (not cooled) make the third body 126 and the coil 400 on the second body 124 close to each other. Since the metal wire itself is coated with glue, the third body 126 and the third body 126 can be heated after heating. The coil 400 on the second body 124 is fixed as a voice coil. In this way, the coil winding device adopts the bobbin 120, which can reduce the structural deviation during the movement of the coil 400, which is beneficial to improve the yield of the voice coil.

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 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 cross-section of the second body and the cross-section of the third body can be polygonal, elliptical, circular, or the like.

As shown in FIG. 8 and FIG. 9 , in this embodiment, the cross section of the second body and the cross section of the third body are both circular, and the diameter of the cross section of the second body is larger than the cross section of the third body diameter of. In this way, it is convenient to obtain a circular coil.

On the basis of any of the above embodiments, as shown in FIGS. 8 and 9 , in one embodiment, the free end of the third body is provided with an introduction portion 128 , and the introduction portion 128 has a rounded corner structure or a reversed tapered corner structure. In this way, it is convenient to use the introduction part to introduce the coil that has been made into the third body, and to connect with the voice coil pick-and-place manipulator.

On the basis of any of the above-mentioned embodiments, as shown in FIG. 1 to FIG. 7 , in one embodiment, the winding auxiliary unit 200 includes a connecting member 210 , at least two matching members 220 , and a second driver 230 , all matching members 220 The sleeve hole 240 is formed in cooperation with the sleeve hole 240 and the connecting piece 210 is provided with an escape space 260. The sleeve hole 240 is sleeved and matched with the bobbin 120, so that the matching piece 220 and the mounting piece 110 are spaced apart to form a limiting space 250. Two drivers 230 drive 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 to rotate, or the rotating unit 300 can drive the spool 120 and the fitting 220 to synchronize along the center line of the spool 120 rotate.

When the above coil winding device is in use, the second driver 230 operates to keep the sleeve hole 240 in an open state; 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, and 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 wound on the spool 120. A first coil 400 is formed. After the first coil 400 is obtained, the second driver 230 moves again to open the sleeve hole 240 , and the first driver 130 moves to move the bobbin 120 , so that the first coil 400 moves out of the limiting space 250 and is disposed in the avoidance space 260 , and is disposed on the third body 126 . 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. The preset distance between, and finally heating to fix all the coils 400 into one 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 "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 "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 two fittings rotate synchronously to realize the opening or closing of the sleeve hole 240 .

Or in another implementation, the winding auxiliary unit 200 further includes a linkage member (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 member, so that the The sleeve hole 240 is open or closed. 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. 10 to 14 , 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. 12 and 14 , in one embodiment, one end of the fitting 220 is drivingly connected with 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, and the mechanical limit is directly used to It is avoided that the resetting of the sleeve hole 240 is unreliable or the repositioning of the sleeve hole 240 is too small due to the over-rotation of the fittings, which squeezes the spool 120 and damages the outer surface of the spool 120, so that the fitting between the fittings 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 matching piece 220 rotate synchronously, which is beneficial to reduce the wear between the two, and is beneficial to improve the service life of the spool 120 .

It should be noted that "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; "Other parts" of a separate component, that is, "a body" and "a part" can be manufactured independently, and then combined with "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 the components included in the "unit", "component", "mechanism" and "device" of the present invention can also be combined flexibly, which can be modularized according to actual needs, so as to facilitate modular assembly. 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 bobbin is characterized in that it comprises a first body for connection, a second body for auxiliary winding and a third body for auxiliary bonding, one end of the second body is connected with the first body The body is fixed, and the other end of the second body is fixed to the third body; wherein, the cross-section of the second body is similar to the cross-section of the third body, and the cross-section of the second body is The area is larger than the cross section of the third body.
The bobbin according to claim 1, wherein the cross-section of the second body and the cross-section of the third body are both circular, and the diameter of the cross-section of the second body is larger than the diameter of the cross-section of the second body The diameter of the cross-section of the third body.
The bobbin according to claim 1 or 2, wherein the free end of the third body is provided with an introduction part, and the introduction part is a rounded corner structure or a reversed cone angle structure.
A coil winding device, characterized in that it includes:

A winding unit, the winding unit comprising the bobbin according to any one of claims 1 to 3, the winding unit further comprising a mounting member and a first driver, one end of the mounting member is provided with a mounting hole, so The bobbin is passed through the installation hole, and the first driver is connected to the first body for driving the bobbin to reciprocate relative to the depth direction of the installation hole;

A winding auxiliary unit, the winding auxiliary unit is provided with a sleeve hole, and the sleeve hole is sleeved and fitted with the winding shaft, so that the winding auxiliary unit and the mounting member are arranged at intervals to form a limiting space; and

A rotating unit, the rotating unit can drive the winding shaft to rotate, or the rotating unit can drive the winding unit and the winding auxiliary unit to rotate synchronously around the center line of the winding shaft.
The coil winding device according to claim 4, wherein the winding auxiliary unit comprises a connecting piece, at least two fitting pieces, and a second driver, and all the fitting pieces cooperate to form the sleeve hole, There is an escape space between the sleeve hole and the connecting piece, and the sleeve hole is sleeved and fitted with the bobbin, so that the matching piece and the mounting piece are spaced to form a limit space, and the second A driver drives at least one of the fittings to move, so that the sleeve holes are opened or closed.
The coil winding device according to claim 5, 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 winding auxiliary unit further includes a linking piece, the matching piece is rotatably arranged on the connecting piece, and the second driver is driven by the linking piece All the fittings rotate synchronously so that the sockets are opened or closed.
The coil winding device according to claim 6, wherein 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 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 5, wherein the fittings are swingably arranged on the connecting pieces; the number of the fittings corresponds to the number of the second drivers one-to-one, and one The second driver drives a fitting to swing; or the winding auxiliary unit further includes a linkage, and the second driver drives all the fittings to swing synchronously through the linkage, so that the sleeve hole is opened or closed.
The coil winding device according to claim 5, 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 any one of claims 5 to 9, wherein each of the fittings can be automatically reset, so that one side of all the fittings cooperate to form the sleeve hole.