Anti-nest thread bonding device and sewing machine

Abstract

The utility model discloses an anti-nest thread bonding device and a sewing machine in the technical field of sewing machines. The anti-nest thread bonding device comprises an auxiliary thread trapper. The connecting end of the wire bonding plate is connected with the auxiliary wire clamping device, and the wire bonding end of the wire bonding plate and the auxiliary wire clamping device can rotate relative to each other; the wire bonding driving assembly is arranged on one side of the auxiliary wire clamping device, and the wire bonding driving assembly is provided with a wire bonding iron core shaft capable of axially moving in a reciprocating mode; the connecting rod is arranged between the wire bonding plate and the wire bonding driving assembly, one end of the connecting rod is hinged to the wire bonding iron core shaft, and the other end of the connecting rod is hinged to the wire bonding plate, so that the wire bonding end of the wire bonding plate is driven to swing through axial movement of the wire bonding iron core shaft. The thread bonding mechanism not only realizes the thread bonding action and prevents the generation of bird nests, but also has the advantage of simple structure, simultaneously avoids the problem that the hand is blocked by the operation space of the machine head, and enables the sewing machine to have a neat appearance.

Description

TECHNICAL FIELD

[0001] The utility model relates to sewing machine technical field, concretely relates to a prevent bird nest beat line device and sewing machine. BACKGROUND

[0002] When the computer flat bed sewing machine starts sewing, there will be a bird nest-like thread ball on the reverse side of the sewing material, and the factories that have certain requirements on sewing quality (middle and high-end customers) require that the thread end be cleaned after sewing, especially for clothing made of thin elastic material, the thinner the fabric, the more sensitive to bird nests.

[0003] At present, garment manufacturers mainly rely on manual trimming, and some garment manufacturers remove bird nests by adding a bird nest prevention device. The manual removal of thread ends has the problems of incomplete cleaning of many thread ends and time-consuming, and only through the layers of cleaning by the operator, inspection and post-processing, the production cost is high. The patent document with publication number CN215440948U discloses a bird nest prevention device and a sewing machine, which adds a bird nest prevention device above the needle plate to clean the bird nest, but has the problems of non-universal presser foot, hand blocking in the machine head operating space and frequent replacement of presser foot blades. The patent document with publication number CN111379090B discloses a thread beating device and a sewing machine with the same, which beats the thread between the two thread clamps to prevent the formation of bird nests, but has the problems of hand blocking in the machine head operating space and affecting the appearance of the sewing machine.

[0004] Therefore, how to solve the problem of hand blocking in the machine head operating space of the bird nest prevention device has become a technical problem that needs to be solved by those skilled in the art. SUMMARY

[0005] Therefore, the utility model aims to provide a bird nest prevention device to solve the technical problem of hand blocking in the machine head operating space of the existing bird nest prevention device.

[0006] The utility model adopts the technical scheme of: a bird nest prevention device, comprising:

[0007] An auxiliary thread clamp;

[0008] A thread beating plate, the connecting end of the thread beating plate is connected with the auxiliary thread clamp, and the thread beating end of the thread beating plate can rotate relative to the auxiliary thread clamp;

[0009] A thread beating drive assembly, the thread beating drive assembly is arranged on one side of the auxiliary thread clamp, and the thread beating drive assembly has a thread beating iron core shaft that can move axially and reciprocally;

[0010] A connecting rod is arranged between the wire punching plate and the wire punching drive assembly. One end of the connecting rod is hinged to the wire punching iron core shaft, and the other end is hinged to the wire punching plate, so as to drive the wire punching end of the wire punching plate to swing through the axial movement of the wire punching iron core shaft.

[0011] Preferably, the auxiliary wire clamp includes a wire clamping electromagnet, a wire clamping piece, a wire clamping spring, an adjusting nut and an adjusting knob. The wire clamping electromagnet includes a base, a wire clamping cover and a wire clamping iron core shaft. The wire clamping cover is fixedly connected to one end of the base, the wire clamping iron core shaft is arranged in the base, one end of the wire clamping iron core shaft extends axially and passes through the wire clamping cover, the adjusting knob is threadedly connected to one end of the wire clamping iron core shaft, the two wire clamping pieces are face to face and can be axially moved on the wire clamping iron core shaft, the wire clamping spring and the adjusting nut are arranged between the adjusting knob and the wire clamping piece, and the adjusting nut is threadedly connected to the wire clamping iron core shaft.

[0012] Preferably, a guide slot is formed on the wire clamping iron core shaft, a limiting shaft is passed through the guide slot, and the end of the limiting shaft is fixedly connected to the wire clamping cover plate.

[0013] Preferably, a radial mounting hole is formed on the wire clamping cover plate, and the top end of the limiting shaft is inserted and fixed in the radial mounting hole.

[0014] Preferably, a wire passing plate is provided between the wire clamping cover plate and the wire clamping piece, and the top end of the wire passing plate is sleeved and installed on the wire clamping cover plate.

[0015] Preferably, the wire clamping cover plate includes a connecting section, an installation section and a limiting section fixedly connected in sequence along the axial direction, the radial dimension of the installation section is smaller than the radial dimension of the connecting section and larger than the radial dimension of the limiting section, the connecting section is fixedly connected to the base, the connecting end of the wire punching plate is sleeved on the outside of the installation section, and the wire punching plate can rotate around the axis of the wire clamping iron core shaft, and a wire passing plate is sleeved on the outside of the limiting section.

[0016] Preferably, a radial mounting hole is formed on the limiting section, a guide slot is formed on the wire clamping iron core shaft, a limiting shaft is passed through the guide slot, and the end of the limiting shaft extends axially into the radial mounting hole, so that the wire clamping iron core shaft and the wire clamping cover plate are fixedly connected in the circumferential direction.

[0017] Preferably, one end of the base extends axially to the outside of the mounting section, and an arc groove is formed at the end of the base along the circumferential direction, and the wire punching plate is located in the arc groove to limit the swing angle of the wire punching plate.

[0018] Preferably, two first threading holes are formed on the wire passing plate, and a second threading hole is formed on the other side of the plate body of the wire punching plate, and the second threading hole is located between the two first threading holes.

[0019] Preferably, an L-shaped connecting frame and a pull rod shaft are fixedly connected to one side of the plate body of the wire punching plate, one end of the pull rod shaft is connected to the plate body, the other end of the pull rod shaft is connected to the L-shaped connecting frame, and the other end of the connecting rod is sleeved on the pull rod shaft.

[0020] Preferably, the wire-punching drive assembly includes a wire-punching electromagnet, a return spring and a retaining spring. The wire-punching electromagnet includes a shell and a wire-punching iron core shaft. The wire-punching iron core shaft is installed inside the shell, and one end of the wire-punching iron core shaft extends axially and is hinged to one end of the connecting rod after passing through the shell. The retaining spring is installed on the wire-punching iron core shaft, and the return spring is installed between the retaining spring and the shell.

[0021] Another object of the present utility model is to provide a sewing machine, comprising the above-mentioned anti-bird's nest thread-punching device and a machine head, the machine head being provided with a first mounting groove and a second mounting groove, the first mounting groove and the second mounting groove being connected by a connecting channel, the auxiliary thread clamp being installed in the first mounting groove, the thread-punching drive assembly being installed in the second mounting groove, and the connecting rod being passed through the connecting channel.

[0022] Beneficial effects of the utility model:

[0023] The utility model adopts a built-in structure, the thread punching drive assembly is installed on one side of the auxiliary thread clamp, the thread punching plate is rotatably installed on the auxiliary thread clamp, and a connecting rod is hinged between the thread punching plate and the thread punching drive. The linear movement of the thread punching drive assembly drives the thread punching plate to swing in a circular direction through the transmission action of the connecting rod. Not only does it realize the thread punching action and prevent the formation of bird's nests, it also has the advantage of a simple structure, while avoiding the problem of the machine head operating space blocking the hands, and making the sewing machine have a neat appearance. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a first-perspective perspective schematic diagram of the bird nest prevention wire-punching device of the present invention;

[0025] Figure 2 This is a second perspective schematic diagram of the bird nest prevention wire striking device of the present invention;

[0026] Figure 3 This is an exploded structural diagram of the bird nest prevention wire striking device of the present invention;

[0027] Figure 4 It is a structural diagram of the auxiliary clamp;

[0028] Figure 5 This is the exploded structure diagram of the auxiliary clamp;

[0029] Figure 6 It is a structural diagram of the wire driving component;

[0030] Figure 7 is a perspective view of the base;

[0031] Figure 8 is a perspective view of the end plate;

[0032] Figure 9 is a perspective view of the wire striking plate;

[0033] Figure 10 is a perspective view of the sewing machine;

[0034] Figure 11 is a perspective view of the machine head.

[0035] Explanation of reference numerals in the drawings:

[0036] 100, auxiliary thread clipper;

[0037] 110, thread clamping electromagnet; 120, wire passing plate; 130, thread clamping piece; 140, thread clamping spring; 150, adjusting nut; 160, adjusting knob;

[0038] 111, base; 1111, arc-shaped slot; 1112, positioning groove; 112, thread clamping cover plate; 1121, connecting section; 1122, mounting section; 1123, limiting section; 1124, radial mounting hole; 1125, threaded hole; 1126, positioning protrusion; 113, thread clamping core shaft; 1131, guide slot hole; 114, limiting shaft;

[0039] 200, wire striking plate;

[0040] 210, plate body; 220, L-shaped connecting frame; 230, pull rod shaft; 240, second wire passing hole; 250, mounting hole;

[0041] 300, wire striking driving assembly;

[0042] 310, wire striking electromagnet; 320, return spring; 330, circlip; 340, shaft position screw; 350, mounting plate; 360, rubber sleeve;

[0043] 311, housing; 312, wire striking core shaft;

[0044] 400, connecting rod;

[0045] 500, machine head;

[0046] 510, first mounting slot; 520, second mounting slot; 530, connecting passage;

[0047] 600, electronic thread clipper;

[0048] 700, main thread clipper. DETAILED DESCRIPTION

[0049] The following is a further detailed description of the specific embodiments of the present invention in conjunction with the accompanying drawings. These embodiments are only used to illustrate the present invention, and are not intended to limit the present invention.

[0050] In the description of the present invention, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "back," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating positions or location relationships, are based on the positions or location relationships shown in the accompanying drawings and are intended solely to facilitate the description of the present invention and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0051] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0052] In addition, in the description of the present invention, unless otherwise specified, “a plurality of” means two or more.

[0053] Examples, such as Figures 1-11 As shown, a bird's nest prevention wire-punching device includes: an auxiliary wire clamp 100, a wire-punching plate 200, a wire-punching drive assembly 300 and a connecting rod 400; the connecting end of the wire-punching plate 200 is connected to the auxiliary wire clamp 100, and the wire-punching end of the wire-punching plate 200 and the auxiliary wire clamp 100 can rotate relative to each other; the wire-punching drive assembly 300 is arranged on one side of the auxiliary wire clamp 100, and the wire-punching drive assembly 300 has a wire-punching iron core shaft 312 that can move axially back and forth; the connecting rod 400 is arranged between the wire-punching plate 200 and the wire-punching drive assembly 300, and one end of the connecting rod 400 is hinged to the wire-punching iron core shaft 312, and the other end of the connecting rod 400 is hinged to the wire-punching plate 200, so that the wire-punching end of the wire-punching plate 200 is driven to swing through the axial movement of the wire-punching iron core shaft 312.

[0054] The utility model discloses adopt built-in structure, install the line driving assembly 300 at the one side of auxiliary wire clamp 100, rotatablely install the line driving assembly 300 on auxiliary wire clamp 100, and the hinge joint link 400 between line driving assembly 300 and line driving assembly 300, can drive the line driving assembly 300 through the transmission of link 400, and the linear movement of line driving assembly 300 drives line driving assembly 300 circumferential swing, not only realizes the line action, prevents the generation of bird nest, also has simple structure's advantage, avoids the problem of head operation space to block the hand simultaneously, and makes sewing machine have neat appearance.

[0055] In a specific embodiment, as shown in Figures 3-5 、 Figure 8 and Figure 9 , the relative rotation of the line driving plate 200 and the auxiliary wire clamp 100 is achieved as follows:

[0056] The auxiliary wire clamp 100 comprises a wire clamping electromagnet 110, a wire passing plate 120, wire clamping pieces 130, a wire clamping spring 140, an adjusting nut 150 and an adjusting knob 160; the wire clamping electromagnet 110 comprises a base 111, a wire clamping cover plate 112 and a wire clamping core shaft 113, the wire clamping cover plate 112 is fixedly connected to one end of the base 111, and the top end of the wire passing plate 120 is fixedly connected to the wire clamping cover plate 112; the wire clamping core shaft 113 is installed in the base 111 and can move axially reciprocatingly, and one end of the wire clamping core shaft 113 extends axially and penetrates through the wire clamping cover plate 112 and the wire passing plate 120.

[0057] The part of the wire clamping core shaft 113 extending out of the base 111 comprises a coaxially fixedly connected light shaft section and a threaded section; the adjusting knob 160 is threadedly connected to one end of the wire clamping core shaft 113, that is, the adjusting knob 160 is threadedly connected to the threaded section of the wire clamping core shaft 113; the number of the wire clamping pieces 130 is two, the two wire clamping pieces 130 are sleeved on the light shaft section of the wire clamping core shaft 113 face to face, and the two wire clamping pieces 130 can move reciprocatingly along the axial direction of the wire clamping core shaft 113; the wire clamping spring 140 and the adjusting nut 150 are arranged between the adjusting knob 160 and the wire clamping pieces 130, and the adjusting nut 150 is threadedly connected to the wire clamping core shaft 113.

[0058] The line driving plate 200 has a connecting end and a line driving end, the connecting end of the line driving plate 200 is sleeved on the wire clamping cover plate 112, and the line driving plate 200 can rotate around the axis of the wire clamping core shaft 113, so that the line driving end of the line driving plate 200 can reciprocatingly swing around the axis of the wire clamping core shaft 113.

[0059] Preferably, as shown in Figure 8 and Figure 9As shown, the wire clamping cover plate 112 includes a connecting section 1121, a mounting section 1122 and a limiting section 1123 fixedly connected in sequence along the axial direction, the radial dimension of the mounting section 1122 is smaller than that of the connecting section 1121, and the radial dimension of the mounting section 1122 is larger than that of the limiting section 1123; the connecting section 1121 is fixedly connected with the base 111, the connecting end of the wire clamping plate 200 is formed with a mounting hole 250, the wire clamping plate 200 is sleeved outside the mounting section 1122 through the mounting hole 250, and the wire clamping plate 200 can rotate; the top end of the wire passing plate 120 is formed with a through hole, the wire passing plate 120 is sleeved outside the limiting section 1123 through the through hole, and the wire passing plate 120 is fixedly connected with the mounting section 1122 (a threaded hole 1125 is formed on the end face of the mounting section 1122) through a screw.

[0060] More preferably, two first wire passing holes are formed on the wire passing plate 120, and the two first wire passing holes are arranged one above the other; a second wire passing hole 240 is formed on the other side of the plate body 210 of the wire clamping plate 200 and matches the first wire passing hole, and the second wire passing hole 240 is located between the two first wire passing holes.

[0061] In a specific embodiment, as shown in Figure 4 、 Figure 5 、 Figure 7 and Figure 8 , the auxiliary wire clamping device 100 includes a wire clamping electromagnet 110, a wire clamping sheet 130, a wire clamping spring 140, an adjusting nut 150 and an adjusting knob 160; the wire clamping electromagnet 110 includes a base 111, a wire clamping cover plate 112 and a wire clamping core shaft 113, the wire clamping cover plate 112 is fixedly connected with one end of the base 111, the wire clamping core shaft 113 is installed in the base 111 and can axially reciprocate, one end of the wire clamping core shaft 113 axially extends and penetrates the wire clamping cover plate 112, and the wire clamping core shaft 113 integrally forms a light shaft section and a threaded section (not shown in the figure) after penetrating the wire clamping cover plate 112.

[0062] The adjusting knob 160 is threadedly connected with one end of the wire clamping core shaft 113, that is, the adjusting knob 160 is threadedly connected on the threaded section of the wire clamping core shaft 113; the number of the wire clamping sheets 130 is two, the two wire clamping sheets 130 are sleeved on the light shaft section of the wire clamping core shaft 113 face to face, and the two wire clamping sheets 130 can reciprocate along the axial direction of the wire clamping core shaft 113; the wire clamping spring 140 and the adjusting nut 150 are arranged between the adjusting knob 160 and the wire clamping sheet 130, and the adjusting nut 150 is threadedly connected with the wire clamping core shaft 113.

[0063] As shown in Figure 8As shown, the wire clamping cover plate 112 is stepped as a whole and includes a connecting section 1121, a mounting section 1122 and a limiting section 1123 fixedly connected in sequence along the axial direction. The radial dimension of the mounting section 1122 is smaller than the radial dimension of the connecting section 1121, and the radial dimension of the mounting section 1122 is larger than the radial dimension of the limiting section 1123.

[0064] The connecting section 1121 is fixedly connected to one end of the base 111, and a radial mounting hole 1124 is formed on the limiting section 1123, and a guide slot 1131 is formed on the wire clamping core shaft 113. The limiting shaft 114 is passed through the guide slot 1131, and the slot length of the guide slot 1131 is greater than the radial dimension of the limiting shaft 114, and the slot width of the guide slot 1131 is equal to the radial dimension of the limiting shaft 114. The slot length direction of the guide slot 1131 is parallel to the axial direction of the wire clamping core shaft 113, and the end of the limiting shaft 114 extends axially into the radial mounting hole 1124, so that the wire clamping core shaft 113 is fixedly connected to the wire clamping cover plate 112 in the circumferential direction, thereby guiding the axial movement of the wire clamping core shaft 113.

[0065] Preferably, Figure 4 and Figure 7 As shown, one end of the base 111 is open, and the open end of the base 111 extends axially to the outside of the mounting section 1122. The connecting end of the wire-punching plate 200 can be rotatably mounted on the mounting section 1122. That is, the base 111 is located on the outside of the connecting end of the wire-punching plate 200, and the end of the base 111 is formed with an arcuate groove 1111 along the circumferential direction to cooperate with the wire-punching plate 200. The wire-punching plate 200 is located in the arcuate groove 1111 to limit the swing angle of the wire-punching plate 200 through the cooperation between the wire-punching plate 200 and the stopper of the base 111.

[0066] At the same time, a positioning protrusion 1126 is fixedly connected to the connecting section 1121 of the wire clamping cover 112, and a positioning groove 1112 is formed at the open end of the base 111. The positioning protrusion 1126 is inserted into the positioning groove 1112, and the wire clamping cover 112 is fixedly connected to the base 111.

[0067] It should be noted that, in this embodiment, the base 111 is an integrated structure consisting of a housing and a static iron core; and the wire clamping iron core shaft 113 is an integrated structure consisting of a moving iron core and a shaft body.

[0068] In a specific embodiment, if Figures 1-3 、 Figure 6 and Figure 9 As shown, the articulation of the connecting rod 400 with the wire plate 200 and the wire driving assembly 300 is achieved as follows:

[0069] An L-shaped connecting frame 220 is fixedly connected to one side of the plate body 210, and one end of the L-shaped connecting frame 220 is fixedly connected to the plate body 210.

[0070] The wire driving assembly 300 comprises a wire electromagnet 310, a reset spring 320 and a snap spring 330.

[0071] Preferably, the wire electromagnet 310 is fixedly connected to the head 500 through the mounting plate 350.

[0072] The wire driving assembly 300 is fixedly connected to the head 500 through the mounting plate 350.

[0073] Preferably, the wire electromagnet 310 is fixedly connected to the head 500 through the mounting plate 350.

[0074] For example, as shown in Figure 10 and Figure 11 A sewing machine comprises a bird nest preventing wire device and a head 500.

[0075] The working process of the sewing machine is as follows:

[0076] The thread clamping method is as follows: the thread clamping electromagnet 110 is energized and attracted, the thread clamping iron core shaft 113 is pulled back, and the adjusting nut 150 drives the two thread clamping pieces 130 to move axially and clamp the upper thread; under normal sewing conditions, the thread clamping electromagnet 110 is not energized, and the thread clamping spring 140 is compressed by adjusting the knob 160 to adjust the tension of the two thread clamping pieces 130 on the upper thread.

[0077] Wire-strike method: the wire-strike electromagnet 310 is energized and attracted, and the wire-strike core shaft 312 is pulled back, and the wire-strike plate 200 is driven to swing and strike the wire through the connecting rod 400 and the pull rod shaft 230.

[0078] When the sewing machine starts to sew the first stitch, the electronic thread tensioner 600 brings the thread under the needle plate.

[0079] After the second stitch, the thread take-up rod moves downward to form a relatively loose upper thread, the auxiliary thread clamp 100 is attracted to clamp the upper thread, the main thread clamp 700 works to loosen the thread, and then the thread punching electromagnet 310 moves to drive the thread punching plate 200 to swing.

[0080] When the thread take-up rod is rising to take up the thread, the main thread clamp 700 stops loosening the thread, and the thread punching electromagnet 310 and the auxiliary thread clamp 100 remain until the thread take-up rod completes the thread taking up. The thread take-up rod will pull back the excess thread at the needle, thereby solving the bird's nest problem on the fabric.

[0081] After maintaining one stitch length, the punching electromagnet 310 is powered off, and the punching core shaft 312 drives the connecting rod to reset under the action of the reset spring 320, while the auxiliary thread clamp 100 is released and sewing is carried out normally.

[0082] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and replacements can be made without departing from the technical principles of the present invention. These improvements and replacements should also be regarded as the scope of protection of the present invention.

Claims

1. A bird nest prevention wire striking device, characterized in that: include: Auxiliary thread clamp (100); A wire punching plate (200), wherein a connection end of the wire punching plate (200) is connected to an auxiliary wire clamp (100), and the wire punching end of the wire punching plate (200) and the auxiliary wire clamp (100) are capable of relative rotation; A wire-bonding drive assembly (300), the wire-bonding drive assembly (300) being arranged on one side of the auxiliary wire clamp (100), and the wire-bonding drive assembly (300) having a wire-bonding iron core shaft (312) capable of axial reciprocating movement; A connecting rod (400) is provided between the wire-punching plate (200) and the wire-punching drive assembly (300), one end of the connecting rod (400) is hinged to the wire-punching iron core shaft (312), and the other end is hinged to the wire-punching plate (200), so that the wire-punching end of the wire-punching plate (200) is driven to swing by the axial movement of the wire-punching iron core shaft (312).

2. The bird nest prevention wire striking device according to claim 1, characterized in that: The auxiliary wire clamp (100) comprises a wire clamping electromagnet (110), a wire clamping piece (130), a wire clamping spring (140), an adjusting nut (150) and an adjusting knob (160); the wire clamping electromagnet (110) comprises a base (111), a wire clamping cover plate (112) and a wire clamping core shaft (113); the wire clamping cover plate (112) is fixedly connected to one end of the base (111); the wire clamping core shaft (113) is arranged in the base (111); the wire clamping core shaft One end of the (113) extends axially and passes through the wire clamping cover plate (112), the adjusting knob (160) is threadedly connected to one end of the wire clamping iron core shaft (113), the two wire clamping pieces (130) are face to face and can be axially moved on the wire clamping iron core shaft (113), the wire clamping spring (140) and the adjusting nut (150) are arranged between the adjusting knob (160) and the wire clamping piece (130), and the adjusting nut (150) is threadedly connected to the wire clamping iron core shaft (113).

3. The bird nest prevention wire striking device according to claim 2, characterized in that: A guide slot (1131) is formed on the wire clamping iron core shaft (113), a limiting shaft (114) is passed through the guide slot (1131), and an end of the limiting shaft (114) is fixedly connected to the wire clamping cover plate (112).

4. The bird nest prevention wire striking device according to claim 3, characterized in that: A radial mounting hole (1124) is formed on the wire clamping cover plate (112), and the top end of the limiting shaft (114) is inserted and fixed in the radial mounting hole (1124).

5. The bird nest prevention wire striking device according to claim 2, characterized in that: A wire passing plate (120) is provided between the wire clamping cover plate (112) and the wire clamping piece (130), and the top end of the wire passing plate (120) is sleeved and mounted on the wire clamping cover plate (112).

6. A bird nest prevention wire striking device according to any one of claims 2 to 5, characterized in that: The wire clamping cover plate (112) comprises a connecting section (1121), a mounting section (1122) and a limiting section (1123) which are fixedly connected in sequence along the axial direction. The radial dimension of the mounting section (1122) is smaller than the radial dimension of the connecting section (1121) and larger than the radial dimension of the limiting section (1123). The connecting section (1121) is fixedly connected to the base (111). The connecting end of the wire punching plate (200) is sleeved on the outside of the mounting section (1122). The wire punching plate (200) is capable of rotating around the axis of the wire clamping iron core shaft (113). A wire passing plate (120) is sleeved on the outside of the limiting section (1123).

7. The bird nest prevention wire striking device according to claim 6, characterized in that: One end of the base (111) extends axially to the outside of the mounting section (1122), and an arcuate groove (1111) is formed at the end of the base (111) along the circumferential direction. The wire punching plate (200) is located in the arcuate groove (1111) to limit the swing angle of the wire punching plate (200).

8. The bird nest prevention wire striking device according to claim 6, characterized in that: Two first threading holes are formed on the wire passing plate (120), and a second threading hole (240) is formed on the other side of the plate body (210) of the wire punching plate (200), and the second threading hole (240) is located between the two first threading holes.

9. The bird nest prevention wire striking device according to claim 1, characterized in that: An L-shaped connecting frame (220) and a pull rod shaft (230) are fixedly connected to one side of the plate body (210) of the wire punching plate (200), one end of the pull rod shaft (230) is connected to the plate body (210), and the other end of the pull rod shaft (230) is connected to the L-shaped connecting frame (220), and the other end of the connecting rod (400) is sleeved on the pull rod shaft (230).

10. The bird nest prevention wire striking device according to claim 1, characterized in that: The wire-punching drive assembly (300) comprises a wire-punching electromagnet (310), a return spring (320) and a retaining spring (330). The wire-punching electromagnet (310) comprises a housing (311) and a wire-punching core shaft (312). The wire-punching core shaft (312) is mounted inside the housing (311), and one end of the wire-punching core shaft (312) extends axially and is hinged to one end of a connecting rod (400) after passing through the housing (311). The retaining spring (330) is mounted on the wire-punching core shaft (312), and the return spring (320) is mounted between the retaining spring (330) and the housing (311).

11. A sewing machine comprising the anti-bird nest threading device according to any one of claims 1 to 10, characterized in that: The sewing machine further comprises a machine head (500), wherein the machine head (500) is provided with a first mounting groove (510) and a second mounting groove (520), wherein the first mounting groove (510) and the second mounting groove (520) are connected via a connecting channel (530), the auxiliary thread clamp (100) is installed in the first mounting groove (510), the thread driving assembly (300) is installed in the second mounting groove (520), and the connecting rod (400) is passed through the connecting channel (530).

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