CN210215810U - Bird nest removing mechanism - Google Patents

Abstract

The utility model provides a remove bird's nest mechanism belongs to sewing machine technical field. It has solved the current inconvenient problem of going the installation and debugging of bird's nest mechanism. This remove bird's nest mechanism, the setting is in aircraft nose department, install the eedle on the aircraft nose, it includes the line of dialling piece to remove bird's nest mechanism, mounting and drive assembly, it has the line hooking board that is used for hooking the suture to dial on the line piece, drive assembly can drive the line of dialling piece and rotate and make the line hooking board remove between eedle below and mounting, it has the line clamping board that can clip the suture to fold with the line hooking board to dial to articulate on the line piece, be provided with the elastic component that makes line clamping board and line hooking board open between line clamping board and the line hooking board, it leans on the portion to have the support that can counterbalance with the line clamping board to lean on to support to lean on the portion and order about the line clamping board. This remove bird's nest mechanism has the convenient advantage of installation and debugging.

Description

Bird nest removing mechanism

Technical Field

The utility model belongs to the technical field of sewing machine, a remove bird's nest mechanism is related to.

Background

The sewing machine is a machine for sewing materials by sewing threads, and comprises a needle rod mechanism, a thread take-up mechanism, a feeding mechanism, a thread hooking mechanism, a pressing mechanism, a winding device, a lubricating device and the like. The sewing machines can be classified into a flat sewing machine, a chain sewing machine, a overedger, a buttonhole sewing machine, a bag sealing machine and the like according to the structural mode or the sewing process mode. The thread comprises a needle thread passing through a needle hole of the machine needle and a shuttle thread led out from a shuttle peg, wherein the needle thread is also called an upper thread, and the shuttle thread is also called a bottom thread. The upper thread is led out from the thread cylinder, passes through the take-up lever after passing through the parts such as the tightener, the thread-buffering lever, the right thread hook and the like, then passes through the parts such as the left thread hook and the like and then penetrates into a needle hole of the machine needle, and the upper thread can be conveyed after the take-up lever acts. When the sewing machine starts the seam, the facial suture receives the effect of power and often can deviate from the pinhole, causes the sewing to break, and the facial suture end when at this moment need will starting the seam stays long, but when facial suture end overlength will form bird's nest structure on the sewing material, influences the pleasing to the eye of sewing material, still needs the manual work to prune after sewing the completion, both extravagant man-hour is difficult to cut clean up again, can damage current stitch seam even.

The chinese patent literature document discloses a device for removing a nest of a sewing machine, the application number: 201510349411.6, respectively; the notice number is: 104911838B ] comprising a drag hook, a thread clamping plate, a needle and a foot pressing plate, wherein the drag hook is positioned below the machine head and is connected with the machine head through a rotating shaft, the needle is provided with a needle eye for a suture to pass through, the foot pressing plate is positioned on a needle plate, the foot pressing plate is provided with a thread passing groove corresponding to the needle, the thread passing groove extends along the moving direction of the sewing material, and the bottom of the thread passing groove is provided with a thread cutter; the pivot drives the drag hook and rotates between eedle below and clamp plate around the axis of rotation under actuating mechanism's drive, and when the drag hook was located the eedle below, with the suture hook of the eye of needle below, the drag hook rotated to with clamp plate complex position when, the drag hook was cliied the suture with clamp plate. The clamping plate is fixedly connected with the machine head through a connecting plate.

Because the suture that daily sewing machine was used is all thinner, consequently foretell bird's nest removing device has higher requirement to the position of thread clamping board, and the thread clamping board can make thread clamping board and drag hook cooperation to carry the suture only in a position. If the position of the clamping plate deviates, when the draw hook rotates to the clamping plate, the gap between the draw hook and the clamping plate is too large, and the suture cannot be clamped; or the drag hook and the clamping plate are blocked in interference fit, so that the device cannot be normally used; or the position of the clamping plate is inclined, one side between the drag hook and the clamping plate is tightly clamped in an interference mode, and the gap on one side is too large, so that the device cannot be normally used. Therefore, the installation position of the clamp plate and the connection plate needs to be adjusted repeatedly in the installation and debugging stage, and the wire clamping effect between the clamp plate and the draw hook can meet the requirement. In order to make the mounting and debugging of the clamping plate convenient, the most common mode is to improve the size precision of the clamping plate, improve the size precision of the connecting plate and improve the machining precision of the fixed connecting plate on the machine head, but the machining process that high-precision equipment and precision are higher needs to be purchased to improve the precision, and the increase of production cost can be caused.

Disclosure of Invention

The utility model aims at the above-mentioned problem that prior art exists, provide a remove bird's nest mechanism, the technical problem of solution makes mechanism installation and debugging convenient.

The purpose of the utility model can be realized by the following technical proposal:

the utility model provides a go bird's nest mechanism, sets up in aircraft nose department, install the eedle on the aircraft nose, go bird's nest mechanism including dialling line spare, mounting and drive assembly, it has the line hooking board that is used for hooking the suture to dial on the line spare, drive assembly can drive to dial line spare and rotate and make the line hooking board remove between eedle below and mounting, its characterized in that, it has the line clamping board that can clip the suture to fold with the line hooking board to dial articulated on the line spare, be provided with the elastic component that makes line clamping board and line hooking board open between line clamping board and the line hooking board, have on the mounting and to support the portion of leaning on that can lean on with the line clamping board, support to lean on to order about the line clamping board on the line clamping board to draw close up to the.

After sewing is finished, the suture is cut off, then the driving assembly drives the thread pulling piece to rotate so that the thread hooking plate moves towards the needle, the abutting part on the fixing piece is separated from the thread clamping plate, and the thread clamping plate and the thread hooking plate are opened under the action of the elastic piece; when the thread hooking plate on the thread shifting piece is located below the needle, the thread enters between the thread hooking plate and the thread clamping plate, then the driving assembly drives the thread shifting piece to rotate reversely, the thread hooking plate of the thread shifting piece moves towards the fixing piece, and after the thread hooking plate reaches the fixing piece, the abutting part abuts against the thread clamping plate to enable the thread clamping plate to be close to the thread hooking plate until the thread clamping plate and the thread hooking plate are closed to clamp the thread. And after the seam is opened again, the seam is cut off, and redundant thread ends can be eliminated, so that the bird nest structure on the seam material is removed.

When bird's nest mechanism was removed in the equipment debugging, will dial the line piece and be connected to on the aircraft nose and with drive assembly, make the crochet hook board be located the eedle department and make and can hook the suture, connect the mounting on the aircraft nose, the position of adjusting the mounting makes to support to lean on the portion can with the clamp support to lean on can. Because the clamp articulates on dialling the line spare, as long as make clamp and hook plate fold and just can realize the clamp, and support to lean on the relation between portion and the clamp, when the position relation of debugging line spare and mounting, only need confirm to support to lean on portion and clamp to support to make the clamp can fold with the hook plate can, the position that need not adjust the mounting reaches the tip of mounting can with the degree of dialling line spare cooperation clamp, the degree of difficulty greatly reduced of installation and debugging to it is convenient to make mechanism installation and debugging.

In addition, the suture is located between the thread hooking plate and the thread clamping plate during thread hooking, so that the suture is not easy to unhook when the thread pulling piece rotates to pull the thread, the suture is not easy to unhook when the abutting portion drives the thread clamping plate to clamp the thread, and the work of the mechanism is more stable.

In the bird nest removing mechanism, the abutting part is strip-shaped, and when the abutting part abuts against the clamping plate, the abutting part and the clamping plate are arranged in a crossed manner.

The relation is supported to homoenergetic formation on each position that is banding support portion of splint like this to make things convenient for the installation and debugging of mounting position, make mechanism installation and debugging convenient.

In the bird nest removing mechanism, one side of the wire clamping plate, which is back to the wire hooking plate, is provided with a contact part abutted against the abutting part, and the contact part protrudes outwards.

The contact part evagination sets up makes things convenient for the contact part to support with supporting to lean on the portion at first, makes support to support the smooth stable the going on of drive of portion to the thread-clamping plate, makes mechanism job stabilization, has also made things convenient for the installation and debugging of mechanism.

In the bird nest removing mechanism, the contact part is in a convex arch shape, the abutting part is provided with an abutting surface abutting against the contact part, and the abutting surface is an arc cylindrical surface.

The abutting part abuts against the contact part and drives the clamp plate to move close to the hook plate, and the abutting surface slides on the contact part. The contact part is protruding arch form, and the face of leaning on is the circular arc cylinder for the relative slip between the face of leaning on and the contact part is more smooth and easy, makes mechanism job stabilization, has also made things convenient for the debugging installation between splint and the mounting.

In foretell go bird's nest mechanism, the front end of thread tension plate has the wire blocking portion to the crooked of thread hooking plate, the side relative with the thread tension plate on the thread hooking plate front end has convex thread hooking portion, breaks away from when leaning on the portion back when the thread tension plate have the clearance between wire blocking portion and the thread hooking portion, and the top of wire blocking portion projects the leading flank of thread hooking portion.

The wire clamping plate and the wire hooking plate are provided with front ends for clamping wires. When the thread clamping plate and the thread hooking plate are opened, a gap is formed between the thread blocking part and the thread hooking part, the thread shifting part rotates towards the machine needle, a thread enters the space between the thread clamping plate and the thread hooking plate from the gap after passing through the front end face of the thread clamping plate, and the thread hooking part protrudes towards the thread clamping plate due to the fact that the thread blocking part is bent towards the thread hooking plate, so that the thread is not easy to drop out after entering the space between the thread clamping plate and the thread hooking plate from the gap, and the mechanism works stably. When the thread clamping plate and the thread hooking plate are opened, the top end of the thread blocking part protrudes out of the front side face of the thread hooking part, and the top end of the baffle part has a blocking effect, so that a thread smoothly enters between the thread clamping plate and the thread hooking plate from a gap, and the mechanism works stably.

In the bird nest removing mechanism, the elastic part comprises a tension spring, one end of the tension spring is connected to the rear end of the clamping plate, and the other end of the tension spring is connected to one side, back to back, of the front end of the wire hooking plate. The tension spring acts on the clamp plate and the thread hooking plate to open the front end of the clamp plate and the front end of the thread hooking plate, so that a suture can enter between the clamp plate and the thread hooking plate.

In the bird nest removing mechanism, the mounting plate is fixedly connected to the machine head, and the wire poking piece and the fixing piece are fixedly connected to the mounting plate.

The thread shifting piece and the fixing piece are fixed on the machine head through the mounting plate, the positions of the thread shifting piece and the fixing piece can be adjusted on the mounting plate, the abutting portion abuts against the thread clamping plate to enable the thread clamping plate and the thread hooking plate to be folded, then the mounting plate is connected to the machine head, and the position is adjusted to enable the thread hooking plate to hook a thread at a machine needle. The sewing machine is characterized in that the sewing machine head is provided with other mechanisms of the sewing machine, so that the installation and adjustment space is limited, the thread shifting piece and the fixing piece are not limited by the space when being fixedly adjusted with the mounting plate, and the thread shifting piece and the fixing piece are installed through the mounting plate, so that the mechanism is convenient to install and adjust only at one position of the sewing machine head.

In foretell bird nest removing mechanism, drive assembly is including fixing the electro-magnet on the mounting panel and wearing to establish the axis of rotation on the mounting panel, dial line spare fixed connection in the axis of rotation, be connected with transmission group between electro-magnet and the axis of rotation, transmission group is including articulating the driving plate one on the mounting panel, be fixed with the bolt on the telescopic link of electro-magnet, be provided with the guide way on the mounting panel, the driving groove has been seted up on the driving plate one, the bolt inserts in the guide way after passing through the driving groove.

The electromagnet acts to drive the first transmission plate to act, and the first transmission plate drives the rotating shaft to rotate, so that the thread shifting piece moves back and forth between the needle and the fixing piece. The arrangement of the guide groove has a guide effect, so that the electromagnet and the transmission plate work stably, and the mechanism runs stably.

In the bird nest removing mechanism, the transmission set further comprises a second transmission plate hinged on the mounting plate, a pull rod is hinged between the first transmission plate and the second transmission plate, and a connecting rod is hinged between the second transmission plate and a swing arm on the rotating shaft.

The motion of the first transmission plate is transmitted to the rotating shaft through the pull rod and the second transmission plate, and the wire poking piece rotates. The pull rod and the second transmission plate can better avoid other mechanisms on the machine head, so that the bird nest removing mechanism is convenient to install and debug.

Compared with the prior art, the utility model has the advantages of it is following:

the thread tension plate is hinged to the thread shifting piece, the supporting part is arranged on the fixing piece, the supporting part supports against the thread tension plate to enable the thread tension plate and the thread hooking plate to be folded to clamp a thread, and the mechanism is convenient to install and debug and stable in work. The abutting part is strip-shaped, and the abutting part and the clamping plate are arranged in a cross mode when abutting against, so that the mechanism is convenient to install and debug. The supporting part is provided with a supporting surface of an arc cylindrical surface, and the back of the clamping plate is provided with a contact part in a convex arch shape, so that the mechanism is convenient to work stably and debug. The thread blocking part on the thread clamping plate is bent towards the thread hooking plate, the thread hooking part on the thread hooking plate protrudes towards the thread clamping plate, and the top end of the thread blocking part protrudes out of the thread hooking part, so that the thread hooking and shifting processes are stable, and the working stability of the mechanism is improved. The telescopic rod of the electromagnet is provided with a bolt, and the bolt is inserted into the guide groove on the mounting plate after passing through the transmission groove of the first transmission plate, so that the mechanism runs stably.

Drawings

FIG. 1 is a first perspective view of the bird nest removing mechanism;

FIG. 2 is a second perspective view of the bird nest removing mechanism;

FIG. 3 is an exploded view of the present de-nesting mechanism;

FIG. 4 is a perspective view of the bird nest removing mechanism when it is installed on a sewing machine to hook a thread;

FIG. 5 is a perspective view of the bird nest removing mechanism when installed on a sewing machine for clamping a thread;

figure 6 is an enlarged partial view of the clamp of figure 4;

FIG. 7 is a partially enlarged view of the wire clamping plate of the bird nest removing mechanism;

fig. 8 is a perspective view of the wire poking rod and the wire clamping plate in the bird nest removing mechanism when being opened.

In the figure, 1, a machine head; 2. a base; 3. a needle; 4. a presser foot; 5. sewing; 6. a wire pulling piece; 6a, a thread hooking plate; 6a1, hook thread portion; 6b, a pin shaft; 7. a wire clamping plate; 7a, a contact portion; 7b, a wire blocking part; 8. an elastic member; 9. a gap; 10. a fixing member; 10a, an abutting portion; 10b, an abutting surface; 10c, an installation part; 11. mounting a plate; 11a, a guide groove; 11b, a buffer seat; 11c, a cushion pad; 12. an electromagnet; 12a, a bolt; 13. a rotating shaft; 14. a first transmission plate; 14a, a transmission groove; 15. a second transmission plate; 16. a pull rod; 17. a connecting rod.

Detailed Description

The following are specific embodiments of the present invention and the accompanying drawings are used to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

Example one

As shown in fig. 1-8, the sewing machine includes a machine head 1 and a base 2, a needle 3 and a presser foot 4 are installed on the machine head 1 of the sewing machine, a suture 5 is penetrated on the needle 3, the presser foot 4 is a presser foot with a knife, and the structure of the presser foot 4 can refer to the bulletin number: patent document CN 206873070U. The base 2 is provided with a feeding tooth which is arranged corresponding to the presser foot 4.

A bird nest removing mechanism is arranged at a machine head 1 and comprises a wire pulling piece 6, a fixing piece 10 and a driving assembly, wherein the wire pulling piece 6, the fixing piece 10 and the driving assembly are all fixed on a mounting plate 11, and the mounting plate 11 is fixedly connected to the rear end face of the machine head 1. The wire shifting piece 6 is in a long strip plate shape, the lower end of the wire shifting piece 6 is bent forwards to form a wire hooking plate 6a, the wire hooking plate 6a is used for hooking the suture 5, and the upper end of the wire shifting piece 6 is connected with the driving assembly. Articulated on the plate 6a that hooks have splint 7, splint 7 is articulated through round pin axle 6b with plate 6a that hooks, and splint 7 is located plate 6 a's below, and plate 6a and splint 7 fold and to clip suture 5, still is provided with between splint 7 and the plate 6a that hooks and makes splint 7 and plate 6a open elastic component 8. The fixing member 10 is in a long strip plate shape, the fixing member 10 is located on the right side of the wire pulling member 6, the rear end of the fixing member 10 is bent upwards to form an installation portion 10c, and the installation portion 10c is fixedly connected to the installation plate 11. The front end of the fixing piece 10 is bent downwards to form a strip-shaped abutting part 10a, and the abutting part 10a can abut against the wire clamping plate 7. The driving component drives the wire pulling piece 6 to rotate so that the wire hooking plate 6a moves between the abutting part 10a of the fixing piece 10 and the lower part of the needle 3. As shown in fig. 7, the elastic member 8 is not shown, the abutting portion 10a abuts on the clamp 7 to urge the clamp 7 to draw close to the hook plate 6a, and when the abutting portion 10a abuts on the clamp 7, the abutting portion 10a crosses the clamp 7. One side of the wire clamping plate 7, which is back to the wire hooking plate 6a, is provided with a contact part 7a abutted against the abutting part 10a, the contact part 7a protrudes outwards to form a convex arch, the abutting part 10a is provided with an abutting surface 10b abutted against the contact part 7a, and the abutting surface 10b is an arc cylindrical surface. As shown in fig. 8, the front end of the clamp 7 is provided with a thread blocking portion 7b bent toward the thread hooking plate 6a, the front end of the clamp 6a is provided with a protruding thread hooking portion 6a1 on the side opposite to the clamp 7, after the clamp 7 is separated from the abutting portion 10a, the front end of the clamp 7 and the front end of the clamp 6a are opened under the action of the elastic member 8, and a gap 9 is formed between the thread blocking portion 7b and the thread hooking portion 6a 1. The distance from the top end of the thread blocking part 7b to the pin shaft 6b is larger than the distance from the top end of the thread hooking part 6a1 to the pin shaft 6b, namely, when the front end of the thread clamping plate 7 and the front end of the thread hooking part 6a are opened, the top end of the thread blocking part 7b protrudes out of the front side surface of the thread hooking part 6a 1. The elastic part 8 comprises a tension spring, one end of the tension spring is connected to the rear end of the clamping plate 7, and the other end of the tension spring is connected to one side, back to the clamping plate 7, of the front end of the line hooking plate 6 a; or the elastic part 8 comprises a torsion spring, the torsion spring is sleeved on the pin shaft 6b, one end of the torsion spring acts on the wire clamping plate 7, and the other end of the torsion spring acts on the wire hooking plate 6 a.

The driving assembly comprises an electromagnet 12 fixed on the mounting plate 11 and a rotating shaft 13 penetrating through the mounting plate 11, the wire shifting piece 6 is fixedly connected on the rotating shaft 13, and a transmission group is connected between the electromagnet 12 and the rotating shaft 13. The transmission group comprises a first transmission plate 14 and a second transmission plate 15 which are hinged to the mounting plate 11, a bolt 12a is fixed on a telescopic rod of the electromagnet 12, a guide groove 11a is formed in the mounting plate 11, a transmission groove 14a is formed in the first transmission plate 14, and the bolt 12a is inserted into the guide groove 11a after passing through the transmission groove 14 a. A pull rod 16 is hinged between the first transmission plate 14 and the second transmission plate 15, and a connecting rod 17 is hinged between the second transmission plate 15 and a swing arm on the rotating shaft 13. Electromagnet 12 sets up in the upper end of mounting panel 11, and electromagnet 12's telescopic link stretches out from electromagnet 12's casing lower extreme, and the below that lies in electromagnet 12 telescopic link on the mounting panel 11 is provided with buffer seat 11b, is provided with blotter 11c on the buffer seat 11b, and blotter 11c is made by silica gel or rubber, and blotter 11c has the cushioning effect when electromagnet 12's telescopic link stretches out. For the sake of simplicity, the extension rod of the electromagnet 12 may be directly hinged to the pull rod 16.

After sewing is finished, the thread 5 is cut off, then the electromagnet 12 acts to drive the thread pulling piece 6 to rotate so that the thread hooking plate 6a moves towards the lower part of the machine needle 3, the abutting part 10a on the fixing piece 10 is separated from the thread clamping plate 7, the thread hooking plate 6a and the thread clamping plate 7 are opened under the action of the tension spring, when the thread hooking plate 6a is positioned below the machine needle 3, the thread 5 enters between the thread hooking plate 6a and the thread clamping plate 7 through the gap 9 between the thread blocking part 7b and the thread hooking part 6a1, then the electromagnet 12 acts reversely to drive the thread pulling piece 6 to rotate reversely, the thread hooking plate 6a moves towards the abutting part 10a of the fixing piece 10, after the thread hooking plate 6a reaches the abutting part 10a of the fixing piece 10, the abutting part 10a abuts against the thread clamping plate 7 so that the thread clamping plate 7 abuts against the thread hooking plate 6a until the thread clamping plate 7 and the thread hooking plate. After the seam is opened again, the sewing thread 5 moves along with the sewing material along with the feeding action of the feeding teeth on the sewing material, and the sewing thread 5 is cut off by contacting with the blade on the presser foot 4 with the blade, namely, the redundant thread end on the sewing material is removed, so that the bird nest structure on the sewing material can be removed. After sewing is once more ended, the thread hooking plate 6a and the thread clamping plate 7 rotate to the machine needle 3, the thread clamping plate 7 is separated from the abutting part 10a of the fixing part 10, the thread clamping plate 7 and the thread hooking plate 6a are opened under the action of the tension spring, and redundant thread heads fall off from between the thread hooking plate 6a and the thread clamping plate 7.

When the bird's nest mechanism is removed in the equipment debugging, install transmission group and axis of rotation 13 on mounting panel 11 earlier, then will dial line spare 6 and be connected to axis of rotation 13 on, then be connected to mounting panel 11 with mounting 10 on, it makes to lean on portion 10a to lean on with splint 7 and drives about splint 7 and plate 6a and fold to adjust the position of mounting 10 on mounting panel 11, again with electro-magnet 12 fixed connection on mounting panel 11, make electro-magnet 12's telescopic link and driving plate 14 be connected, then with mounting panel 11 fixed connection on aircraft nose 1, suture 5 can enter into between plate 6a and the splint 7 when adjusting the position of mounting panel 11 and making plate 6a be located the eedle 3 below. Because the splint 7 articulates on the crochet hook 6a, and support to support for supporting the relation between portion 10a and the splint 7, in the in-process of debugging mounting 10 and the position relation of dialling line piece 6, only need confirm support portion 10a and splint 7 support to make the splint 7 can fold with the crochet hook 6a can, the position that need not adjust mounting 10 reaches the tip of mounting 10 can with the degree of dialling the 6 cooperation trapping of line piece, the degree of difficulty greatly reduced of installation and debugging, thereby make the mechanism installation and debugging convenient. In addition, during the crocheting, the suture 5 is positioned between the thread hooking plate 6a and the thread clamping plate 7, so that the suture 5 is not easy to unhook when the thread pulling piece 6 rotates to pull the thread, and the unhooking of the suture 5 is not easy to cause when the abutting part 10a drives the thread clamping plate 7 to clamp the thread, so that the mechanism works more stably.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.

Claims (9)

1. The utility model provides a go bird's nest mechanism, sets up in aircraft nose (1) department, install eedle (3) on aircraft nose (1), go bird's nest mechanism includes wire-dialing piece (6), mounting (10) and drive assembly, wire-dialing piece (6) are last to have line hooking plate (6a) that is used for hooking suture (5), drive assembly can drive wire-dialing piece (6) and rotate and make line hooking plate (6a) move between eedle (3) below and mounting (10), its characterized in that, articulated on wire-dialing piece (6) have with line hooking plate (6a) fold can with suture (5) clip board (7) of cliping, be provided with between line clipping plate (7) and line hooking plate (6a) and make mounting (7) and line hooking plate (6a) open elastic component (8), have on line-dialing piece (10) can with the line clipping plate (7) butt against by portion (10a), the abutting part (10a) abuts against the thread clamping plate (7) to drive the thread clamping plate (7) to be close to the thread hooking plate (6 a).

2. The de-nesting mechanism according to claim 1, characterized in that said abutment (10a) is strip-shaped, said abutment (10a) being arranged crosswise to the clamps (7) when the abutment (10a) abuts against the clamps (7).

3. The de-nesting mechanism according to claim 2, characterized in that the side of the thread clamp (7) facing away from the thread hooking plate (6a) has a contact portion (7a) against which an abutment portion (10a) abuts, said contact portion (7a) projecting outwards.

4. The bird nest removing mechanism according to claim 3, wherein the contact portion (7a) is in a convex arch shape, the abutting portion (10a) is provided with an abutting surface (10b) abutting against the contact portion (7a), and the abutting surface (10b) is a circular cylindrical surface.

5. The bird nest removing mechanism according to any one of claims 1 to 4, wherein the front end of the wire clamping plate (7) is provided with a wire blocking part (7b) bent toward the wire hooking plate (6a), the side surface of the front end of the wire hooking plate (6a) opposite to the wire clamping plate (7) is provided with a protruded wire hooking part (6a1), a gap (9) is formed between the wire blocking part (7b) and the wire hooking part (6a1) after the wire clamping plate (7) is separated from the abutting part (10a), and the top end of the wire blocking part (7b) protrudes from the front side surface of the wire hooking part (6a 1).

6. The bird nest removing mechanism according to claim 5, wherein the elastic member (8) comprises a tension spring, one end of which is connected to the rear end of the clamp plate (7), and the other end of which is connected to the side of the front end of the hook plate (6a) opposite to the clamp plate (7).

7. The bird nest removing mechanism according to any one of claims 1 to 4, wherein a mounting plate (11) is fixedly connected to the handpiece (1), and the wire poking member (6) and the fixing member (10) are fixedly connected to the mounting plate (11).

8. The bird nest removing mechanism according to claim 7, wherein the driving assembly comprises an electromagnet (12) fixed on the mounting plate (11) and a rotating shaft (13) penetrating through the mounting plate (11), the wire pulling member (6) is fixedly connected to the rotating shaft (13), a transmission set is connected between the electromagnet (12) and the rotating shaft (13), the transmission set comprises a first transmission plate (14) hinged on the mounting plate (11), a bolt (12a) is fixed on a telescopic rod of the electromagnet (12), a guide groove (11a) is formed in the mounting plate (11), a transmission groove (14a) is formed in the first transmission plate (14), and the bolt (12a) is inserted into the guide groove (11a) after passing through the transmission groove (14 a).

9. The bird nest removing mechanism according to claim 8, wherein the transmission set further comprises a second transmission plate (15) hinged on the mounting plate (11), a pull rod (16) is hinged between the first transmission plate (14) and the second transmission plate (15), and a connecting rod (17) is hinged between the second transmission plate (15) and a swing arm on the rotating shaft (13).

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