CN212277291U - Self-locking type winding needle mechanism and battery cell winding device - Google Patents

Abstract

The utility model discloses a from locking-type book needle mechanism and electric core take-up device relates to electric core coiling technical field. One end of an upper outer clamping needle of the self-locking needle rolling mechanism is connected with one end of a lower inner clamping needle. One end of the lower outer clamping needle is connected with one end of the upper inner clamping needle. The upper outer clamping needle, the upper inner clamping needle, the lower inner clamping needle and the lower outer clamping needle are sequentially arranged at intervals, and one ends of the upper outer clamping needle, the upper inner clamping needle, the lower inner clamping needle and the lower outer clamping needle, which are respectively far away from the rolling needle base, are respectively an upper outer end, an upper inner end, a lower inner end and a lower outer end. The first elastic piece is respectively connected with the coiling needle base and the upper outer clamping needle, and enables the upper outer end to have the trend of moving close to the upper inner end, and the upper inner end has the trend of moving close to the lower outer end. The connector can strut upper and lower outer end and upper and lower inner and outer end for go up outer clip needle and keep away from each other with outer clip needle down, and make and go up interior clip needle and be close to each other with interior clip needle down. The self-locking type winding needle mechanism and the battery cell winding device have the characteristics of high winding efficiency and stable winding.

Description

Self-locking type winding needle mechanism and battery cell winding device

Technical Field

The utility model relates to an electricity core coiling technical field particularly, relates to a from locking-type book needle mechanism and electric core take-up device.

Background

At present, a winding machine is often used in the production process of batteries such as power lithium batteries, a winding needle on the winding machine is an important part for winding the batteries, and the quality and the production efficiency of a battery core are directly influenced by the structure and the convenient use degree of the winding needle.

However, in the winding process of the battery cell, the conventional winding needle mechanism needs a specific wrong needle mechanism to stagger the winding needle and tighten the winding needle through the wrong needle mechanism, so that the winding needle completes the actions of connecting the diaphragm, winding the battery cell and drawing out the battery cell, and the auxiliary actions are more and slower, which causes difficulty in speeding up the equipment and influences the production beat of the equipment. Secondly, current book needle mechanism staggers when rolling up the needle and tighten up and roll up the needle, the easy appearance rolls up the condition that the needle does not target in place, if: the coil needle is not staggered completely, which easily results in poor consistency of the battery cell, and even leads to the situation that the battery cell is difficult to take down and damages the battery cell when blanking.

In view of this, it is very important to develop a self-locking needle winding mechanism and a cell winding device that can solve the above technical problems.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a from locking-type book needle mechanism, it has the coiling efficiency higher, and convolutes stable characteristics.

Another object of the present invention is to provide an electric core winding method, which is also characterized by high winding efficiency and stable winding.

The utility model provides a technical scheme:

in a first aspect, an embodiment of the present invention provides a self-locking needle winding mechanism, which includes a connector, a needle winding base, a first needle winding assembly and a second needle winding assembly, where the first needle winding assembly includes an upper outer clip, a lower inner clip and a first elastic member; the second winding needle assembly comprises a lower outer clamping needle and an upper inner clamping needle; one end of the upper outer clamping needle is connected with one end of the lower inner clamping needle and is rotatably connected to the needle rolling base; one end of the lower outer clamping needle is connected with one end of the upper inner clamping needle and is rotatably connected to the needle rolling base; the upper outer clamp needles, the upper inner clamp needles, the lower inner clamp needles and the lower outer clamp needles are sequentially arranged at intervals, and one ends of the upper outer clamp needles, the upper inner clamp needles, the lower inner clamp needles and the lower outer clamp needles, which are respectively far away from the needle rolling base, are respectively an upper outer end, an upper inner end, a lower inner end and a lower outer end; the first elastic piece is respectively connected with the winding needle base and the upper outer clamping needle, and applies elastic force to the upper outer clamping needle, so that the upper outer end has a tendency to move close to the upper inner end, and the upper inner end has a tendency to move close to the lower outer end; the connector can support simultaneously hold in go up the outer end go up the inner, down the inner reaches the outer end down to strut go up the outer end with go up the inner and down the inner with the outer end down, make go up outer clamp needle with press from both sides the needle and keep away from each other down outward, in order to pass through go up outer clamp needle with press from both sides needle winding electricity core down outward, and make go up interior clamp needle with interior clamp needle is close to each other down, in order to pass through go up interior clamp needle with press from both sides the diaphragm in down.

With reference to the first aspect, in a first implementation manner of the first aspect, the self-locking needle winding mechanism further includes a linkage connection component; the upper outer clamping needle and the lower outer clamping needle are connected through a linkage connecting piece, so that when the upper outer clamping needle rotates relative to the winding needle base, the lower outer clamping needle is driven to rotate through the linkage connecting piece, the upper outer end and the upper inner end can move towards or away from each other, and the upper inner end and the lower outer end move towards or away from each other.

With reference to the first aspect and the foregoing implementation manner, in a second implementation manner of the first aspect, the linkage connecting piece is fixedly connected to the upper outer clip, a linkage sliding hole is formed in the lower outer clip, and the linkage connecting piece is slidably disposed in the linkage sliding hole, so that when the upper outer clip rotates relative to the needle winding base, the inner wall of the linkage sliding hole is abutted by the linkage connecting piece to drive the lower outer clip to rotate.

With reference to the first aspect and the foregoing implementation manner, in a third implementation manner of the first aspect, the second needle winding assembly further includes a second elastic element, where the second elastic element is connected to the needle winding base and the lower outer clip needle, respectively, and applies an elastic force to the lower outer clip needle so as to make the upper outer end and the upper inner end have a tendency to approach each other and make the upper inner end and the lower outer end have a tendency to approach each other together with the first elastic element; the first elastic piece and the second elastic piece are symmetrically arranged, the upper outer clamping needle and the lower outer clamping needle are symmetrically arranged, and the upper inner clamping needle and the lower inner clamping needle are symmetrically arranged.

With reference to the first aspect and the foregoing implementation manner, in a fourth implementation manner of the first aspect, the upper outer clip needle includes an upper outer needle and an upper outer seat that are connected to each other, the lower inner clip needle includes a lower inner needle and a lower inner seat that are connected to each other, and the upper outer seat is connected to the lower inner seat; the lower outer clamping needle comprises a lower outer needle and a lower outer seat which are connected with each other, the upper inner clamping needle comprises an upper inner needle and an upper inner seat which are connected with each other, and the lower outer seat is connected with the upper inner seat; the upper outer seat and the lower outer seat are respectively connected with the winding needle base in a rotating mode, the first elastic piece is respectively connected with the winding needle base and the upper outer needle, and the second elastic piece is respectively connected with the winding needle base and the lower outer needle; the upper outer needle, the upper inner needle, the lower inner needle and the lower outer needle are respectively arranged at the upper outer end, the upper inner end, the lower inner end and the lower outer end at the ends far away from the winding needle base.

With reference to the first aspect and the foregoing implementation manner, in a fifth implementation manner of the first aspect, a base housing having an opening is disposed on the needle winding base, the upper outer seat, the upper inner seat, the lower inner seat, and the lower outer seat are all disposed in the base housing, and the upper outer needle, the upper inner needle, the lower inner needle, and the lower outer needle all extend outward from the base housing; the self-locking needle rolling mechanism further comprises a plurality of sliding guide structures, and the sliding guide structures are arranged in gaps in front of the inner wall of the base shell and the upper outer seat, the upper inner seat, the lower inner seat and the lower outer seat respectively, so that when the upper outer seat, the upper inner seat, the lower inner seat and the lower outer seat rotate relative to the base shell, the sliding guide structures slide relative to the corresponding sliding guide structures.

With reference to the first aspect and the foregoing implementation manner, in a sixth implementation manner of the first aspect, the second needle winding assembly includes a first diaphragm pressing plate and a third elastic member that are connected to each other, and the first needle winding assembly includes a second diaphragm pressing plate and a fourth elastic member that are connected to each other; the first diaphragm pressing plate is positioned on one side of the upper inner needle close to the lower inner needle and is connected with the upper inner needle through the third elastic piece, and the second diaphragm pressing plate is positioned on one side of the lower inner needle close to the upper inner needle and is connected with the lower inner needle through the fourth elastic piece; and when the lower inner end and the upper inner end are close to each other, the first diaphragm pressing plate and the second diaphragm pressing plate can be driven by the third elastic piece and the fourth elastic piece to be close to each other respectively, so that the diaphragm is clamped by the first diaphragm pressing plate and the second diaphragm pressing plate.

With reference to the first aspect and the foregoing implementation manner, in a seventh implementation manner of the first aspect, a guide protrusion is convexly disposed on the connecting head; go up the outer end, go up the inner, down the inner reaches the outer end is respective terminal surface down all include one with the length direction who goes up the outer clip needle is the inclined plane that sets up of contained angle, the connector passes through the direction protruding with the inclined plane supports to hold and struts go up the outer end with go up the inner and down the inner with the outer end down.

With reference to the first aspect and the foregoing implementation manner, in an eighth implementation manner of the first aspect, the connecting head is further provided with a limiting protrusion, a gap is formed between the limiting protrusion and the guiding protrusion, and when the guiding protrusion opens the upper outer end and the upper inner end, and the lower inner end and the lower outer end, the upper outer end and the lower outer end are located in the gap between the limiting protrusion and the guiding protrusion.

In a second aspect, the embodiment of the present invention further provides an electric core winding device, including the self-locking type needle winding mechanism. The self-locking needle rolling mechanism comprises a connector, a needle rolling base, a first needle rolling assembly and a second needle rolling assembly, wherein the first needle rolling assembly comprises an upper outer clamping needle, a lower inner clamping needle and a first elastic piece; the second winding needle assembly comprises a lower outer clamping needle and an upper inner clamping needle; one end of the upper outer clamping needle is connected with one end of the lower inner clamping needle and is rotatably connected to the needle rolling base; one end of the lower outer clamping needle is connected with one end of the upper inner clamping needle and is rotatably connected to the needle rolling base; the upper outer clamp needles, the upper inner clamp needles, the lower inner clamp needles and the lower outer clamp needles are sequentially arranged at intervals, and one ends of the upper outer clamp needles, the upper inner clamp needles, the lower inner clamp needles and the lower outer clamp needles, which are respectively far away from the needle rolling base, are respectively an upper outer end, an upper inner end, a lower inner end and a lower outer end; the first elastic piece is respectively connected with the winding needle base and the upper outer clamping needle, and applies elastic force to the upper outer clamping needle, so that the upper outer end has a tendency to move close to the upper inner end, and the upper inner end has a tendency to move close to the lower outer end; the connector can support simultaneously hold in go up the outer end go up the inner, down the inner reaches the outer end down to strut go up the outer end with go up the inner and down the inner with the outer end down, make go up outer clamp needle with press from both sides the needle and keep away from each other down outward, in order to pass through go up outer clamp needle with press from both sides needle winding electricity core down outward, and make go up interior clamp needle with interior clamp needle is close to each other down, in order to pass through go up interior clamp needle with press from both sides the diaphragm in down.

Compared with the prior art, the embodiment of the utility model provides a from locking-type book needle mechanism includes for prior art's beneficial effect:

the first coiling needle assembly comprises an upper outer clamping needle, a lower inner clamping needle and a first elastic piece, the second coiling needle assembly comprises a lower outer clamping needle and an upper inner clamping needle, one end of the upper outer clamping needle is connected with one end of the lower inner clamping needle, and the end of the upper outer clamping needle connected with the lower inner clamping needle is further rotatably connected with the coiling needle base. One end of the lower outer clamping needle is connected with one end of the upper inner clamping needle, one end of the lower outer clamping needle, which is connected with the upper inner clamping needle, is rotatably connected with the needle rolling base, and the upper outer clamping needle, the upper inner clamping needle, the lower inner clamping needle and the lower outer clamping needle are sequentially arranged at intervals. The ends of the upper outer clamping needle, the upper inner clamping needle, the lower inner clamping needle and the lower outer clamping needle which are respectively far away from the coiling needle base are respectively an upper outer end, an upper inner end, a lower inner end and a lower outer end. The first elastic piece is connected with the needle winding base and the upper outer clamping needle respectively, and can apply elastic force to the upper outer clamping needle, so that the upper outer clamping needle tends to turn to the upper inner clamping needle, and the lower inner clamping needle tends to turn to the lower outer clamping needle. The connector can simultaneously abut against the upper outer end, the upper inner end, the lower inner end and the lower outer end to prop open the upper outer end, the upper inner end, the lower inner end and the lower outer end so as to enable the upper outer clamping needle and the lower outer clamping needle to be far away from each other, the overall dimensions of the first winding needle assembly and the second winding needle assembly are increased, the battery cell is wound through the upper outer clamping needle and the lower outer clamping needle, the upper inner clamping needle and the lower inner clamping needle are enabled to be close to each other so as to clamp the diaphragm through the upper inner clamping needle and the lower inner clamping needle, after the battery cell is formed by winding, the abutting against the upper outer end, the upper inner end, the lower inner end and the lower outer end can be released through the connector, the upper outer clamping needle is enabled to rotate towards the upper inner clamping needle under the action of the first elastic piece, the lower inner clamping needle rotates towards the lower outer clamping needle so as to reduce the overall dimensions of the first winding needle assembly and the second winding needle assembly, so that the first winding needle connector and the second winding needle, The upper inner end, the lower inner end and the lower outer end, and the action of releasing the upper outer end, the upper inner end, the lower inner end and the lower outer end are simpler, the situation that the first needle rolling assembly and the second needle rolling assembly are not in place is not easy to occur, and the self-locking needle rolling mechanism has higher stability.

The embodiment of the utility model provides an electricity core take-up device is the same for prior art's beneficial effect with foretell from locking-type book needle mechanism for prior art's beneficial effect, no longer gives unnecessary details here.

In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the embodiments will be briefly described below. It is appreciated that the following drawings depict only certain embodiments of the invention and are therefore not to be considered limiting of its scope. For a person skilled in the art, it is possible to derive other relevant figures from these figures without inventive effort.

Fig. 1 is the embodiment of the utility model provides a from locking-type book needle mechanism be applied to electric core take-up device's schematic structure.

Fig. 2 is a schematic perspective view of the self-locking needle winding mechanism provided in the embodiment of the present invention.

Fig. 3 is a schematic structural diagram of a side of the self-locking needle winding mechanism provided in the embodiment of the present invention.

Fig. 4 is a schematic sectional structure view of the self-locking needle winding mechanism provided in the embodiment of the present invention.

Icon: 100-cell winding device; 20-a first winding drive; 30-a second roll drive; 10-self-locking needle winding mechanism; 11-a first winding needle assembly; 112-upper external clip; 1121-upper outer seat; 1122-upper outer needle; 1123-upper outer end; 1125-upper outer sheet; 113-lower inner clip; 1131-lower inner seat; 1132 — lower inner needle; 1133-lower inner end; 115-a first elastic member; 116-a second diaphragm press; 117-a fourth elastic member; 12-a second winding needle assembly; 122-lower external clip; 1221-lower outer seat; 1225-linkage slide hole; 1226-lower outer sheet; 1222-lower outer needle; 1223-lower outer end; 123-upper inner clamping needle; 1231-upper inner seat; 1232-upper inner needle; 1233-upper inner end; 125-a second elastic member; 126-a first diaphragm press; 127-a third resilient member; 13-a connector; 131-a guide projection; 132-a limit projection; 15-a needle winding base; 151-base housing; 16-a sliding guide structure; 17-a linkage connection; a-a first direction; b-a second direction; c-a third direction; d-the fourth direction.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the drawings in the embodiments of the present invention are combined below to clearly and completely describe the technical solutions in the embodiments of the present invention. It is to be understood that the embodiments described are only some of the embodiments of the present invention, and not all of them. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures. The terms "upper", "lower", "inner", "outer", "left", "right", and the like refer to orientations or positional relationships based on those shown in the drawings, or orientations or positional relationships that are conventionally used to place the products of the present invention, or orientations or positional relationships that are conventionally understood by those skilled in the art, and are used merely to facilitate the description of the present invention and to simplify the description, but do not indicate or imply that the device or component being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present invention. The terms "first," "second," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance. The terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

It is also to be understood that, unless expressly stated or limited otherwise, the terms "disposed," "connected," and the like are intended to be open-ended, and mean "connected," i.e., fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; the connection may be direct or indirect via an intermediate medium, and may be a communication between the two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

The following describes in detail embodiments of the present invention with reference to the accompanying drawings.

Example (b):

referring to fig. 1, fig. 1 is a schematic structural diagram of a self-locking needle winding mechanism 10 applied to a battery cell winding device 100 according to an embodiment of the present invention.

The embodiment of the utility model provides a from locking-type book needle mechanism 10, this from locking-type book needle mechanism 10 is used for coiling electric core, and it has the coiling efficiency higher, and convolutes stable characteristics. The self-locking needle winding mechanism 10 can be applied to a cell winding device 100 or a cell production system, and the like.

In the embodiment of applying the self-locking winding needle mechanism 10 to the electrical core winding device 100, the electrical core winding device 100 includes the self-locking winding needle mechanism 10, so as to wind the electrical core through the self-locking winding needle mechanism 10, so as to improve the efficiency and stability of winding the electrical core, of course, the electrical core winding device 100 may further include a first winding driving member 20 and a second winding driving member 30, both the first winding driving member 20 and the second winding driving member 30 are connected to the self-locking winding needle mechanism 10, the first winding driving member is used to drive the self-locking winding needle mechanism 10 to rotate so as to wind the electrical core, and the second winding driving member 30 is used to drive the self-locking winding needle mechanism 10, so that the self-locking winding needle mechanism 10 is connected to electrical components such as a diaphragm, so as to complete the winding operation, and is convenient to be drawn out from.

Because electric core take-up device 100 has adopted the embodiment of the utility model provides a from locking-type book needle mechanism 10, so this electric core take-up device 100 also has the coiling efficiency higher, and convolutes stable characteristics.

The structural composition, the working principle and the advantageous effects of the self-locking needle winding mechanism 10 provided by the embodiment of the present invention will be described in detail below.

Referring to fig. 2, fig. 3 and fig. 4, fig. 2 is a schematic perspective view of a self-locking needle winding mechanism 10 according to an embodiment of the present invention. Fig. 3 is a schematic structural diagram of a side surface of the self-locking needle winding mechanism 10 according to an embodiment of the present invention. Fig. 4 is a schematic cross-sectional structure diagram of the self-locking needle winding mechanism 10 according to an embodiment of the present invention. The self-locking needle winding mechanism 10 in fig. 3 is in a drawing-out state, and the self-locking needle winding mechanism 10 in fig. 4 is in a winding-up state. In addition, in fig. 3, the direction indicated by the arrow corresponding to a is the first direction a, the direction indicated by the arrow corresponding to B is the second direction B, the direction indicated by the arrow corresponding to C is the third direction C, and the direction indicated by the arrow corresponding to D is the fourth direction D.

The self-locking needle winding mechanism 10 comprises a connector 13, a needle winding base 15, a first needle winding assembly 11 and a second needle winding assembly 12, wherein a first winding driving member is connected with the needle winding base 15 to drive the first needle winding assembly 11 and the second needle winding assembly 12 to rotate through the needle winding base 15 so as to perform the action of winding the battery cell, a second winding driving member 30 is connected with the connector 13 so as to drive the connector 13 to be close to or far from the first needle winding assembly 11 and the second needle winding assembly 12, so that when the connector 13 is close to the first needle winding assembly 11 and the second needle winding assembly 12, the first needle winding assembly 11 and the second needle winding assembly 12 are in a winding state and are connected with a diaphragm so as to complete the winding operation, when the connector 13 is far from the first needle winding assembly 11 and the second needle winding assembly 12, the first needle winding assembly 11 and the second needle winding assembly 12 are in a withdrawing state, so that the external dimensions of the first needle winding assembly 11 and the second needle winding assembly 12 become, so as to be convenient for drawing out from the electric core of the self-locking type needle winding mechanism 10 and improve the overall efficiency of winding operation.

The first winding needle assembly 11 includes an upper outer clamping needle 112, a lower inner clamping needle 113 and a first elastic element 115, the second winding needle assembly 12 includes a lower outer clamping needle 122 and an upper inner clamping needle 123, one end of the upper outer clamping needle 112 is connected with one end of the lower inner clamping needle 113, and the end of the upper outer clamping needle 112 connected with the lower inner clamping needle 113 is further rotatably connected with the winding needle base 15.

One end of the lower outer clip 122 is connected with one end of the upper inner clip 123, one end of the lower outer clip 122 connected with the upper inner clip 123 is further rotatably connected with the needle winding base 15, the upper outer clip 112, the upper inner clip 123, the lower inner clip 113 and the lower outer clip 122 are sequentially arranged at intervals, in other words, the upper inner clip 123 is located between the upper outer clip 112 and the lower inner clip 113, the lower inner clip 113 is located between the upper inner clip 123 and the lower outer clip 122, the upper outer clip 112 is located on one side of the upper inner clip 123 far away from the lower inner clip 113, the lower outer clip 122 is located on one side of the lower inner clip 113 far away from the upper inner clip 123, and the upper outer clip 112, the upper inner clip 123, the lower inner clip 113 and the lower outer clip 122 are in a substantially parallel pair.

The ends of the upper outer clip 112, the upper inner clip 123, the lower inner clip 113 and the lower outer clip 122, which are far away from the needle winding base 15, are an upper outer end 1123, an upper inner end 1233, a lower inner end 1133 and a lower outer end 1223, respectively. The first elastic member 115 is connected to the needle winding base 15 and the upper outer clip 112, respectively, and is capable of applying an elastic force to the upper outer clip 112 such that the upper outer clip 112 has a tendency to turn toward the upper inner clip 123 and the lower inner clip 113 has a tendency to turn toward the lower outer clip 122, in other words, the elastic force applied to the upper outer clip 112 by the first elastic member 115 causes the upper outer end 1123 to have a tendency to move closer to the upper inner end 1233 while causing the upper inner end 1233 to have a tendency to move closer to the lower outer end 1223.

The connector 13 can simultaneously abut against the upper outer end 1123, the upper inner end 1233, the lower inner end 1133 and the lower outer end 1223 to spread the upper outer end 1123, the upper inner end 1233, the lower inner end 1133 and the lower outer end 1223, so that the upper outer clip 112 and the lower outer clip 122 are away from each other, the outer dimensions of the first winding needle assembly 11 and the second winding needle assembly 12 are increased, so as to wind the battery cell through the upper outer clip 112 and the lower outer clip 122, and simultaneously, the upper inner clip 123 and the lower inner clip 113 are close to each other, so as to clip the septum through the upper inner clip 123 and the lower inner clip 113, and after the battery cell is formed by winding, the connector 13 can also release the abutment against the upper outer end 1123, the upper inner end 1233, the lower inner end 1133 and the lower outer end 1223, so that the upper outer clip 112 rotates towards the upper inner clip 123 under the action of the first elastic element 115, and the lower inner clip 113 turns towards the lower outer clip 122, so as to reduce the outer dimensions of the first winding needle assembly 11 and the second winding needle assembly 12, so that the first winding needle assembly 11 and the second winding needle assembly 12 are drawn out of the battery cell, the connector 13 abuts against the upper outer end 1123, the upper inner end 1233, the lower inner end 1133 and the lower outer end 1223, and the action of releasing the upper outer end 1123, the upper inner end 1233, the lower inner end 1133 and the lower outer end 1223 is simple, and the situation that the first winding needle assembly 11 and the second winding needle assembly 12 are not in place is not easy to occur, so that the self-locking winding needle mechanism 10 has high stability.

The existing winding needle mechanism needs a specific wrong needle mechanism to stagger a winding needle and tighten the winding needle through the wrong needle mechanism in the winding process of the battery cell, the action precision requirement is high, the speed is low, and the production efficiency and stability of the battery cell are influenced.

In contrast, the self-locking needle winding mechanism 10 according to the present embodiment operates substantially as follows when winding the battery cell:

before the winding operation, the second winding driving member 30 drives the connecting head 13 to move, so that the connecting head 13 abuts against the upper outer end 1123, the upper inner end 1233, the lower inner end 1133 and the lower outer end 1223 to expand the upper outer end 1123, the upper inner end 1233, the lower inner end 1133 and the lower outer end 1223, so that the upper outer clip 112 rotates in the direction, and the lower outer clip 122 rotates in the fourth direction D, so that the upper outer clip 112 and the lower outer clip 122 move away from each other, the external dimensions of the first winding needle assembly 11 and the second winding needle assembly 12 are increased, meanwhile, the upper inner clip 123 rotates in the first direction a, the lower inner clip 1132 rotates in the third direction C, so that the upper inner clip 123 and the lower inner clip 113 move close to each other, the septum is clamped by the upper inner clip 123 and the lower inner clip 113, and at this time, the self-locking type winding needle mechanism 10 is in a winding state.

And performing winding operation, wherein the first winding driving part drives the winding needle base 15 to rotate, so as to drive the first winding needle assembly 11 and the second winding needle assembly 12 to rotate through the winding needle base 15, and wind the battery cell through the upper outer clamping needle 112 and the lower outer clamping needle 122.

After the formed battery cell is wound, the second winding driving member 30 drives the connector 13 to move, so that the connector 13 releases the abutting with the upper outer end 1123, the upper inner end 1233, the lower inner end 1133 and the lower outer end 1223, the upper outer clip 112 rotates along the first direction a under the action of the elastic force of the first elastic member 115, and turns to the upper inner clip 123, and meanwhile, the lower inner clip 113 rotates along the first direction a, so as to turn to the lower outer clip 122, and the upper inner clip 123 and the lower inner clip 113 are away from each other, at this time, the first winding needle assembly 11 and the second winding needle assembly 12 have smaller overall dimensions, the self-locking winding needle winding mechanism 10 is in a drawn-out state, and the upper inner clip 123 and the lower inner clip 113 release the diaphragm, so as to take down the wound battery cell.

In this way, the self-locking needle winding mechanism 10 can realize fast state switching by the movement of the connecting head 13 and the cooperation of the first elastic member 115, and the state of the self-locking needle winding mechanism 10 is switched by abutting and releasing, so that the operation is simple and the stability is high.

With continued reference to fig. 2, 3 and 4, the upper outer clip 112 may include an upper outer needle 1122 and an upper outer seat 1121 which are connected to each other, the lower inner clip 113 may include a lower inner needle 1132 and a lower inner seat 1131 which are connected to each other, and the upper outer seat 1121 is connected to the lower inner seat 1131 to connect the lower inner needle 1132 and the upper outer needle 1122. The lower outer clip needle 122 may include an interconnected lower outer needle 1222 and lower outer hub 1221, the upper inner clip needle 123 may include an interconnected upper inner needle 1232 and upper inner hub 1231, and the lower outer hub 1221 may be connected to the upper inner hub 1231 to connect the lower outer needle 1222 and the upper inner hub 1231. The upper outer seat 1121 and the lower outer seat 1221 are respectively rotatably connected to the needle winding base 15, the first elastic element 115 is respectively connected to the needle winding base 15 and the upper outer needle 1122, and one ends of the upper outer needle 1122, the upper inner needle 1232, the lower inner needle 1132 and the lower outer needle 1222, which are respectively away from the needle winding base 15, are respectively an upper outer end 1123, an upper inner end 1233, a lower inner end 1133 and a lower outer end 1223, so that the upper outer needle 1122 and the lower inner needle 1132 are connected to the lower inner seat 1131 through the upper outer seat 1121, and the lower outer needle 1222 and the upper inner needle 1232 are connected to the upper outer seat 1231 through the lower outer seat 1221, so as to adjust the relative position relationship between the upper outer needle 1122, the upper inner needle 1232, the lower inner needle 1132 and the lower outer needle 1222, and improve the adaptability of the self-locking needle winding mechanism 10.

It should be noted that the first needle assembly 11 further includes an upper outer panel 1125, the second needle assembly 12 further includes a lower outer panel 1226, the upper outer panel 1125 is connected to the upper outer needle 1122, the lower outer panel 1226 is connected to the lower outer panel 1226, and the upper outer panel 1125 and the lower outer panel 1226 cooperate to form an elliptic cylinder, although in other embodiments, the upper outer panel 1125 and the lower outer panel 1226 cooperate to form a cylinder of other shapes.

Further, the second winding pin assembly 12 may further include a second elastic member 125, the second elastic member 125 being connected to the winding pin base 15 and the lower outer clip 122, respectively, for applying an elastic force to the lower outer clip 122, so as to make the upper outer end 1123 and the upper inner end 1233 have a tendency to approach each other and the upper inner end 1233 and the lower outer end 1223 have a tendency to approach each other in cooperation with the first elastic member 115, and the first elastic member 115 and the second elastic member 125 are symmetrically disposed, the upper outer clip 112 and the lower outer clip 122 are symmetrically disposed, and the upper inner clip 123 and the lower inner clip 113 are symmetrically disposed.

Thus, when the connector 13 is released from the upper outer end 1123, the upper inner end 1233, the lower inner end 1133 and the lower outer end 1223, the upper outer clip 112 rotates the upper outer clip 112 and the lower inner clip 113 in the first direction a under the action of the elastic force of the first elastic member 115, the lower outer clip 122 rotates the lower outer clip 122 and the upper inner clip 123 in the third direction C under the action of the elastic force of the second elastic member 125, so that the lower inner clip 113 and the lower outer clip 122 move toward each other, the upper inner clip 123 and the lower inner clip 113 move away from each other, the first winding needle assembly 11 and the second winding needle assembly 12 have symmetrical shapes after the sizes are reduced, and the upper inner clip 123 and the lower inner clip 113 symmetrically release the septum together, so that the operation is more stable and the structure is more stable. When the connector 13 abuts against the first rolling needle assembly 11 and the second rolling needle assembly 12, the lower inner needle clamp 113 and the lower outer needle clamp 122 move back to back, the upper inner needle clamp 123 and the lower inner needle clamp 113 approach each other, the shapes of the first rolling needle assembly 11 and the second rolling needle assembly 12 are symmetrical after the external dimensions become larger, and the upper inner needle clamp 123 and the lower inner needle clamp 113 symmetrically clamp the septum together, so that the winding error is smaller.

In this embodiment, the first elastic member 115 is connected to the lower outer needle 1222, and the second elastic member 125 is connected to the lower outer needle 1222. In the embodiment, the first elastic element 115 and the second elastic element 125 are coil springs in an elastically compressed and deformed state, but in other embodiments, other elastic elements may be used, such as elastic rubber, elastic air bags, elastic metal sheets, and the like.

Further, the needle winding base 15 may be provided with a base housing 151 having an opening, the upper outer seat 1121, the upper inner seat 1231, the lower inner seat 1131, and the lower outer seat 1221 are disposed in the base housing 151, and the upper outer needle 1122, the upper inner needle 1232, the lower inner needle 1132, and the lower outer needle 1222 are all extended outward from the base housing 151. The self-locking needle winding mechanism 10 may further include a plurality of sliding guide structures 16, the plurality of sliding guide structures 16 are respectively disposed in the inner wall of the base housing 151 and the gaps in front of the upper outer seat 1121, the upper inner seat 1231, the lower inner seat 1131, and the lower outer seat 1221, so as to slide relative to the corresponding sliding guide structures 16 when the upper outer seat 1121, the upper inner seat 1231, the lower inner seat 1131, and the lower outer seat 1221 rotate relative to the base housing 151, so as to avoid direct friction between the upper outer seat 1121, the upper inner seat 1231, the lower inner seat 1131, and the lower outer seat 1221 and the base housing 151 when moving relative to the base housing 151, and in addition, the sliding guide structures 16 are further configured to limit the upper outer seat 1121, the upper inner seat 1231, the lower inner seat 1131, and the lower outer seat 1221 from moving along the respective rotation axis directions, so as to further improve the winding stability of the needle winding mechanism 10.

In the present embodiment, the slide guide structure 16 is a structure of a laminated slide sheet and a slide plate, and balls are provided between the slide sheet and the slide plate to reduce the sliding resistance of the slide sheet and the slide plate, but in other embodiments, the slide guide structure 16 may be a slide member such as a bull's eye bearing or a flat thrust bearing.

Further, the self-locking needle winding mechanism 10 may further include a linkage connector 17, the upper outer gripper needle 112 and the lower outer gripper needle 122 are connected by the linkage connector 17, so that when the upper outer gripper needle 112 rotates relative to the needle winding base 15, the lower outer gripper needle 122 is driven to rotate by the linkage connector 17, so that the upper outer end 1123 and the upper inner end 1233 can move towards or away from each other, and the upper inner end 1233 and the lower outer end 1223 can move towards or away from each other. In other words, the upper outer gripper 112 and the lower outer gripper 122 rotate synchronously with the linkage connection 17, further improving the winding stability of the self-locking needle winding mechanism 10.

Further, the linkage connecting piece 17 is fixedly connected to the upper outer clip 112, a linkage sliding hole 1225 can be formed in the lower outer clip 122, and the linkage connecting piece 17 is slidably disposed in the linkage sliding hole 1225, so that when the upper outer clip 112 rotates relative to the needle winding base 15, the linkage connecting piece 17 abuts against the inner wall of the linkage sliding hole 1225 to drive the lower outer clip 122 to rotate, and therefore the effect that the upper outer clip 112 and the lower outer clip 122 rotate synchronously is achieved.

In this embodiment, the linkage connection member 17 is fixedly connected to the upper outer seat 1121, and is slidably connected to the linkage sliding hole 1225 of the lower outer seat 1221. In addition, in other embodiments, the linkage connection member 17 may also be other types of linkage members, for example, cooperating linkage teeth are provided on both the upper outer seat 1121 and the lower outer seat 1221 to realize linkage of the upper outer seat 1121 and the lower outer seat 1221, and the embodiment is not limited to a specific linkage form.

Further, the second rolling needle assembly 12 may further include a first septum presser 126 and a third elastic member 127 which are connected to each other, the first rolling needle assembly 11 may further include a second septum presser 116 and a fourth elastic member 117 which are connected to each other, the first septum presser 126 is located on a side of the upper inner needle 1232 close to the lower inner needle 1132 and is connected to the upper inner needle 1232 through the third elastic member 127, and the second septum presser 116 is located on a side of the lower inner needle 1132 close to the upper inner needle 1232 and is connected to the lower inner needle 1132 through the fourth elastic member 117.

Thus, when the lower inner end 1133 and the upper inner end 1233 are close to each other, the first diaphragm pressing plate 126 and the second diaphragm pressing plate 116 can be driven by the third elastic element 127 and the fourth elastic element 117 to be close to each other, so that the diaphragm is clamped by the first diaphragm pressing plate 126 and the second diaphragm pressing plate 116, the diaphragm is pressed more sufficiently, and the winding stability of the self-locking needle winding mechanism 10 is further improved.

Furthermore, the connector 13 may be provided with a guide protrusion 131 in a protruding manner, and each end surface of the upper outer end 1123, the upper inner end 1233, the lower inner end 1133, and the lower outer end 1223 includes a slope forming an included angle with the length direction of the upper outer clip 112, and the connector 13 supports the upper outer end 1123, the upper inner end 1233, the lower inner end 1133, and the lower outer end 1223 through the respective slopes of the guide protrusion 131 and the upper outer end 1123, the upper inner end 1233, the lower inner end 1133, and the lower outer end 1223, so as to improve the stability of the supporting action.

Furthermore, a limiting protrusion 132 may be further convexly disposed on the connecting head 13, a gap is provided between the limiting protrusion 132 and the guiding protrusion 131, and when the guiding protrusion 131 expands the upper outer end 1123, the upper inner end 1233, the lower inner end 1133, and the lower outer end 1223, the upper outer end 1123 and the lower outer end 1223 are located in the gap between the limiting protrusion 132 and the guiding protrusion 131 to limit the relative positions of the upper outer end 1123 and the lower outer end 1223, so that the outer dimensions of the upper outer needle 1122 and the lower outer needle 1222 are stable when in a winding state, and the winding stability of the self-locking needle winding mechanism 10 is further improved.

In addition, the guide protrusion 131 and the limiting protrusion 132 may be both annular, and the guide protrusion 131 is located in the limiting protrusion 132, so that when the connector 13 abuts against the upper outer end 1123, the upper inner end 1233, the lower inner end 1133, and the lower outer end 1223, at any angle, the upper outer end 1123, the upper inner end 1233, the lower inner end 1133, and the lower outer end 1223 can be spread by the connector 13, and the annular guide protrusion 131 can also limit the positions of the upper inner end 1233 and the lower inner end 1133, so as to further improve the winding stability of the self-locking needle winding mechanism 10.

The embodiment of the utility model provides a from locking-type book needle mechanism 10's theory of operation is:

the first winding needle assembly 11 includes an upper outer clip 112, a lower inner clip 113 and a first elastic element 115, the second winding needle assembly 12 includes a lower outer clip 122 and an upper inner clip 123, one end of the upper outer clip 112 is connected with one end of the lower inner clip 113, and the end of the upper outer clip 112 connected with the lower inner clip 113 is further rotatably connected with the winding needle base 15. One end of the lower outer clip 122 is connected with one end of the upper inner clip 123, one end of the lower outer clip 122 connected with the upper inner clip 123 is further rotatably connected with the needle winding base 15, the upper outer clip 112, the upper inner clip 123, the lower inner clip 113 and the lower outer clip 122 are sequentially arranged at intervals, in other words, the upper inner clip 123 is located between the upper outer clip 112 and the lower inner clip 113, the lower inner clip 113 is located between the upper inner clip 123 and the lower outer clip 122, the upper outer clip 112 is located on one side of the upper inner clip 123 far away from the lower inner clip 113, the lower outer clip 122 is located on one side of the lower inner clip 113 far away from the upper inner clip 123, and the upper outer clip 112, the upper inner clip 123, the lower inner clip 113 and the lower outer clip 122 are in a substantially parallel pair. The ends of the upper outer clip 112, the upper inner clip 123, the lower inner clip 113 and the lower outer clip 122, which are far away from the needle winding base 15, are an upper outer end 1123, an upper inner end 1233, a lower inner end 1133 and a lower outer end 1223, respectively. The first elastic member 115 is connected to the needle winding base 15 and the upper outer clip 112, respectively, and is capable of applying an elastic force to the upper outer clip 112 such that the upper outer clip 112 has a tendency to turn toward the upper inner clip 123 and the lower inner clip 113 has a tendency to turn toward the lower outer clip 122, in other words, the elastic force applied to the upper outer clip 112 by the first elastic member 115 causes the upper outer end 1123 to have a tendency to move closer to the upper inner end 1233 while causing the upper inner end 1233 to have a tendency to move closer to the lower outer end 1223. The connector 13 can simultaneously abut against the upper outer end 1123, the upper inner end 1233, the lower inner end 1133 and the lower outer end 1223 to spread the upper outer end 1123, the upper inner end 1233, the lower inner end 1133 and the lower outer end 1223, so that the upper outer clip 112 and the lower outer clip 122 are away from each other, the outer dimensions of the first winding needle assembly 11 and the second winding needle assembly 12 are increased, so as to wind the battery cell through the upper outer clip 112 and the lower outer clip 122, and simultaneously, the upper inner clip 123 and the lower inner clip 113 are close to each other, so as to clip the septum through the upper inner clip 123 and the lower inner clip 113, and after the battery cell is formed by winding, the connector 13 can also release the abutment against the upper outer end 1123, the upper inner end 1233, the lower inner end 1133 and the lower outer end 1223, so that the upper outer clip 112 rotates towards the upper inner clip 123 under the action of the first elastic element 115, and the lower inner clip 113 turns towards the lower outer clip 122, so as to reduce the outer dimensions of the first winding needle assembly 11 and the second winding needle assembly 12, so that the first winding needle assembly 11 and the second winding needle assembly 12 are drawn out of the battery cell, the connector 13 abuts against the upper outer end 1123, the upper inner end 1233, the lower inner end 1133 and the lower outer end 1223, and the action of releasing the upper outer end 1123, the upper inner end 1233, the lower inner end 1133 and the lower outer end 1223 is simple, and the situation that the first winding needle assembly 11 and the second winding needle assembly 12 are not in place is not easy to occur, so that the self-locking winding needle mechanism 10 has high stability.

In summary, the following steps:

the embodiment of the utility model provides a from locking-type book needle mechanism 10, it has the coiling efficiency higher, and convolutes stable characteristics.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and it will be apparent to those skilled in the art that the features in the above embodiments may be combined with each other without conflict, and various modifications and variations of the present invention are possible. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention. The present embodiments are to be considered as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims (10)

1. A self-locking needle rolling mechanism is characterized by comprising a connecting head (13), a needle rolling base (15), a first needle rolling assembly (11) and a second needle rolling assembly (12), wherein the first needle rolling assembly (11) comprises an upper outer clamping needle (112), a lower inner clamping needle (113) and a first elastic piece (115); the second winding needle assembly (12) comprises a lower outer clamping needle (122) and an upper inner clamping needle (123);

one end of the upper outer clamping needle (112) is connected with one end of the lower inner clamping needle (113) and is rotatably connected with the needle rolling base (15); one end of the lower outer clamping needle (122) is connected with one end of the upper inner clamping needle (123) and is rotatably connected with the needle rolling base (15); the upper outer clamping needle (112), the upper inner clamping needle (123), the lower inner clamping needle (113) and the lower outer clamping needle (122) are sequentially arranged at intervals, and one end of each needle far away from the needle rolling base (15) is an upper outer end (1123), an upper inner end (1233), a lower inner end (1133) and a lower outer end (1223);

the first elastic piece (115) is respectively connected with the coiling needle base (15) and the upper outer clamping needle (112) and applies elastic force to the upper outer clamping needle (112) so that the upper outer end (1123) has a tendency to move close to the upper inner end (1233) and the upper inner end (1233) has a tendency to move close to the lower outer end (1223);

the connector (13) can simultaneously abut against the upper outer end (1123), the upper inner end (1233), the lower inner end (1133) and the lower outer end (1223) to open the upper outer end (1123), the upper inner end (1233), the lower inner end (1133) and the lower outer end (1223), so that the upper outer clamping needle (112) and the lower outer clamping needle (122) are far away from each other to wind the battery cell through the upper outer clamping needle (112) and the lower outer clamping needle (122), and the upper inner clamping needle (123) and the lower inner clamping needle (113) are close to each other to clamp the diaphragm through the upper inner clamping needle (123) and the lower inner clamping needle (113).

2. The self-locking needle winding mechanism according to claim 1, wherein the self-locking needle winding mechanism (10) further comprises a linkage connector (17);

the upper outer clamping needle (112) and the lower outer clamping needle (122) are connected through a linkage connecting piece (17), so that when the upper outer clamping needle (112) rotates relative to the needle winding base (15), the lower outer clamping needle (122) is driven to rotate through the linkage connecting piece (17), the upper outer end (1123) and the upper inner end (1233) can move towards or away from each other, and the upper inner end (1233) and the lower outer end (1223) can move towards or away from each other.

3. The self-locking needle rolling mechanism according to claim 2, wherein the linkage connecting piece (17) is fixedly connected to the upper outer clamping needle (112), a linkage sliding hole (1225) is formed in the lower outer clamping needle (122), and the linkage connecting piece (17) is slidably disposed in the linkage sliding hole (1225) so that when the upper outer clamping needle (112) rotates relative to the needle rolling base (15), the linkage connecting piece (17) abuts against the inner wall of the linkage sliding hole (1225) to drive the lower outer clamping needle (122) to rotate.

4. The self-locking needle rolling mechanism according to claim 1, wherein the second needle rolling assembly (12) further comprises a second elastic member (125), the second elastic member (125) is connected with the needle rolling base (15) and the lower outer clip needle (122) respectively, and applies elastic force to the lower outer clip needle (122) to make the upper outer end (1123) and the upper inner end (1233) have a tendency to approach each other and the upper inner end (1233) and the lower outer end (1223) have a tendency to approach each other together with the first elastic member (115);

the first elastic piece (115) and the second elastic piece (125) are symmetrically arranged, the upper outer clamping needle (112) and the lower outer clamping needle (122) are symmetrically arranged, and the upper inner clamping needle (123) and the lower inner clamping needle (113) are symmetrically arranged.

5. The self-locking needle rolling mechanism according to claim 4, wherein the upper outer clip needle (112) comprises an upper outer needle (1122) and an upper outer seat (1121) which are connected with each other, the lower inner clip needle (113) comprises a lower inner needle (1132) and a lower inner seat (1131) which are connected with each other, and the upper outer seat (1121) is connected with the lower inner seat (1131); the lower outer clip needle (122) comprises a lower outer needle (1222) and a lower outer seat (1221) which are connected with each other, the upper inner clip needle (123) comprises an upper inner needle (1232) and an upper inner seat (1231) which are connected with each other, and the lower outer seat (1221) is connected with the upper inner seat (1231);

the upper outer seat (1121) and the lower outer seat (1221) are respectively connected to the needle winding base (15) in a rotating manner, the first elastic piece (115) is respectively connected with the needle winding base (15) and the upper outer needle (1122), and the second elastic piece (125) is respectively connected with the needle winding base (15) and the lower outer needle (1222); the upper outer needle (1122), the upper inner needle (1232), the lower inner needle (1132) and the lower outer needle (1222) are respectively the upper outer end (1123), the upper inner end (1233), the lower inner end (1133) and the lower outer end (1223) at the end away from the needle rolling base (15).

6. The self-locking needle rolling mechanism according to claim 5, wherein a base housing (151) having an opening is provided on the needle rolling base (15), the upper outer seat (1121), the upper inner seat (1231), the lower inner seat (1131) and the lower outer seat (1221) are all disposed in the base housing (151), and the upper outer needle (1122), the upper inner needle (1232), the lower inner needle (1132) and the lower outer needle (1222) all extend outward from the base housing (151);

the self-locking needle rolling mechanism (10) further comprises a plurality of sliding guide structures (16), wherein the sliding guide structures (16) are respectively arranged in gaps in front of the inner wall of the base shell (151) and the upper outer seat (1121), the upper inner seat (1231), the lower inner seat (1131) and the lower outer seat (1221) so as to slide relative to the corresponding sliding guide structures (16) when the upper outer seat (1121), the upper inner seat (1231), the lower inner seat (1131) and the lower outer seat (1221) rotate relative to the base shell (151).

7. The self-locking needle rolling mechanism according to claim 5, wherein the second needle rolling assembly (12) comprises a first septum pressing plate (126) and a third elastic member (127) which are connected with each other, and the first needle rolling assembly (11) comprises a second septum pressing plate (116) and a fourth elastic member (117) which are connected with each other;

the first diaphragm pressing plate (126) is positioned at one side of the upper inner needle (1232) close to the lower inner needle (1132) and is connected with the upper inner needle (1232) through the third elastic piece (127), and the second diaphragm pressing plate (116) is positioned at one side of the lower inner needle (1132) close to the upper inner needle (1232) and is connected with the lower inner needle (1132) through the fourth elastic piece (117);

and when the lower inner end (1133) and the upper inner end (1233) are close to each other, the first diaphragm pressing plate (126) and the second diaphragm pressing plate (116) can be driven by the third elastic piece (127) and the fourth elastic piece (117) to be close to each other respectively, so that the diaphragm is clamped by the first diaphragm pressing plate (126) and the second diaphragm pressing plate (116).

8. The self-locking needle rolling mechanism according to any one of claims 1-7, characterized in that the connecting head (13) is provided with a guide projection (131) in a protruding manner;

the end faces of the upper outer end (1123), the upper inner end (1233), the lower inner end (1133) and the lower outer end (1223) respectively comprise an inclined plane which forms an included angle with the length direction of the upper outer clip (112), and the connector (13) is abutted against the inclined plane through the guide protrusion (131) to prop open the upper outer end (1123), the upper inner end (1233), the lower inner end (1133) and the lower outer end (1223).

9. The self-locking needle rolling mechanism according to claim 8, wherein a limiting protrusion (132) is further protruded from the connecting head (13), a gap is formed between the limiting protrusion (132) and the guiding protrusion (131), and when the guiding protrusion (131) props open the upper outer end (1123) and the upper inner end (1233) and the lower inner end (1133) and the lower outer end (1223), the upper outer end (1123) and the lower outer end (1223) are located in the gap between the limiting protrusion (132) and the guiding protrusion (131).

10. A cell winding device, characterized by comprising the self-locking winding needle mechanism (10) according to any one of claims 1 to 9.

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