198 results about "Bird nest" patented technology

This invention provides a single-action anti-bird nest thread-cutting mechanism and its control method. The single-action anti-bird nest thread-cutting mechanism includes a fixed blade, a rotatable movable blade, a thread-cutting drive source, and a thread-cutting drive assembly. The fixed blade has a fixed blade edge. The thread-cutting drive source is connected to the movable blade via the thread-cutting drive assembly, driving the movable blade to rotate towards or away from the fixed blade. The movable blade has a starting thread hook groove and a separating thread hook groove. The starting thread hook groove allows the sewing machine needle to pass through. The movable blade has a moving blade edge on its surface facing the fixed blade. The starting thread hook groove and the separating thread hook groove are distributed on the same side of the moving blade edge. This application uses the same thread-cutting drive source and the same set of movable and fixed blades to achieve the purpose of preventing bird nests during the starting thread cutting and automatic thread cutting after sewing, effectively avoiding thread breakage during the starting thread and achieving a stable effect of normal starting thread without bird nest clumps.

The invention provides a power transmission line foreign matter detection method in a complex environment based on MEF-YOLOv8, and relates to the technical field of power transmission line intelligent detection.The method comprises the steps that firstly, a foreign matter image data set comprising bird nests, garbage, kite and balloons is constructed, the data set is expanded and enhanced through the Mosaic-9 data enhancement technology, and the foreign matter image data set is obtained; a LabelImg tool is adopted to carry out detection frame labeling on the data set, and the generalization ability of the model is improved; secondly, an efficient multi-scale attention (EMA) module is integrated into a C2f structure of a YOLOv8 backbone network, and pixel-level enhancement of multi-scale foreign matter features is achieved through feature grouping, parallel sub-network processing and cross-space learning; then, a Focal-EIOU loss function is integrated into the YOLOv8 model, and the training process is optimized through EIOU loss item calculation, a Focal weight adjustment mechanism and hyper-parameter lambda fusion; and finally, training and testing the improved YOLOv8 model, and outputting a detection result. According to the method, the detection precision and robustness of the foreign matters of the power transmission line in a complex environment are remarkably improved.

The utility model discloses a bird nest type rotary storage device which comprises a backboard lifting device, a backboard lifting device a and a disc storage device, the backboard lifting device and the backboard lifting device a are the same in structure, the two sides of the backboard lifting device and the backboard lifting device a are respectively provided with a front face and a back face, and the backboard lifting device and the backboard lifting device a are inserted into the disc storage device formed by stacking multiple layers of disc plates at intervals. And bracket supporting tables and double rows of bracket supporting tables are alternately arranged on the circumference of the disc plate. When the front / back surfaces of the lifting plates are opposite, double rows / single supporting tables are respectively accommodated, single and double rows of sample box access areas are formed, and the space utilization rate and the access efficiency are improved. And the backboard is bent to form an isosceles mounting opening and a limiting structure, and is matched with a wire slot for storing the disc and a storage opening to realize quick disassembly and assembly, so that the maintenance cost is reduced. Through modular design and structural optimization, the problems that the storage disk is inconvenient to disassemble, insufficient in space and the like are solved, and the storage disk has the advantages of being flexible to disassemble and assemble, low in cost, high in storage efficiency and the like.

A substation portal frame bird nest removing device is carried by an unmanned aerial vehicle platform and comprises an executing mechanism fixedly connected to the bottom of the unmanned aerial vehicle platform through a rigid connecting frame, the executing mechanism comprises a main shell, the bottom of the main shell is open, and a memory alloy driving ring is contained in the main shell; the memory alloy driving ring is restored and popped out of the main shell through deformation of the electric heating driving assembly; the memory alloy driving ring comprises at least four sections of memory alloy arc sheets, and the four sections of memory alloy arc sheets are hinged end to end through hinges to form a deformable annular structure; a flexible wrapping bag is fixed to the inner wall of the main shell in a sealed mode, and the edge of a bag opening of the flexible wrapping bag and the outer edge of the memory alloy driving ring are sewn and fixed through a high-temperature line. The memory alloy driving ring is further provided with a hot feeding cutting system. A negative pressure adsorption system is arranged outside the main shell and used for enabling the flexible package bag to be adsorbed to the outer edge of the bird nest, and the bird nest can be efficiently pulled out while the safety of the birds is guaranteed.

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.

1. The name of the design product: bird nest (toilet). 2. The use of the design product: for pet bird toilet. 3. The design points of the design product: in shape. 4. The picture or photo that best shows the design points: perspective view.

The application discloses a kind of specific frequency electromagnetic wave interference target navigation's expelling system and method, belong to navigation countermeasure technical field.The present application obtains nest coordinate set, obtains the stress threshold of the bird class to which each nest belongs;Calculate the noise influence range from inside to outside, form nest area influence range set;Record the model of target unmanned aerial vehicle and target coordinate;The target coordinate at the present time is matched with nest area influence range set in space, and the output judgment result is output;When target is in nest area influence range, output frequency is normal interference frequency;When target is in nest area influence range, whether the bird is in nest, whether environmental noise value is greater than stress threshold is judged, and sub-scene judgment and interference execution are carried out;In the process of navigation interference, screening is separated from boundary point, and predetermined trajectory is generated;Based on predetermined trajectory, target is interfered with navigation, and when the current coordinate of target is separated from bird breeding area, navigation interference is terminated.

1. The name of the design product: silicone mold (bird nest house clock pendulum assembly 1). 2. The use of the design product: silicone mold for making clock pendulum assembly. 3. The design features of the design product: in shape. 4. The picture or photo that best indicates the design features: perspective view 1.

The invention discloses a converter station filter bird damage cleaning tool, and relates to the field of electric power safety tools, the converter station filter bird damage cleaning tool comprises an injection pipe, a telescopic pipe, a negative pressure medicament bottle and a high pressure fan, the telescopic pipe is vertically arranged, the upper end of the telescopic pipe is communicated with the injection pipe, and the telescopic pipe and the injection pipe are vertically arranged; an insulating handheld part is arranged at the lower end of the telescopic pipe, an outlet of the negative-pressure medicament bottle is communicated with the telescopic pipe, the high-pressure fan is communicated with the lower side of the telescopic pipe through an air hose, and the communicating position of the negative-pressure medicament bottle and the telescopic pipe is higher than the communicating position of the air hose and the telescopic pipe. According to the invention, the bird nest can be quickly processed.

The utility model discloses a telescopic pavilion imitating a bird nest structure, which comprises a plurality of mutually connected modules, and each module comprises a fixed unit and a movable unit; each unit comprises two bamboo columns and a plurality of bamboo beams, the two units share one bamboo column, a plurality of through holes are formed in the shared bamboo column, one end of the fixed end bamboo beam is inserted into the fixed end bamboo column to be fixed, and the other end of the fixed end bamboo beam penetrates through the through hole of the shared bamboo column; one end of the movable end bamboo beam is inserted into the movable end bamboo column to be fixed, and the other end is inserted into a hollow part in the fixed end bamboo beam and can move back and forth in the fixed end bamboo beam; in the same module, the lengths of the bamboo beams on different layers are different and are set according to requirements; a limiting structure is arranged between the fixed end bamboo beam and the movable end bamboo beam, so that the two bamboo beams are prevented from being separated; when adjacent modules are combined, the fixing unit of the first module is fixedly connected with the moving unit of the second module. Through the nested telescopic and lightweight design, the pavilion is easy to disassemble, assemble and move, and is convenient to use in different occasions.

The invention discloses a bird nest type hydrogenation protective agent for a coal-to-oil system as well as a preparation method and application of the bird nest type hydrogenation protective agent, and belongs to the technical field of catalyst protection. The preparation method of the protective agent comprises the following steps: kneading pseudo-boehmite, a binder and a special molecular sieve, then adding an acid solution, polyvinyl alcohol and glycerol, and carrying out wet kneading to obtain mud; after wet kneading is finished, sequentially carrying out vacuum pugging, aging, extrusion molding by adopting a bird nest type mold, pelletizing and roasting to obtain a protective agent carrier; and loading an active metal component on the obtained protective agent carrier, and sintering to obtain the protective agent. According to the protective agent, the pseudo-boehmite with high crystallinity and high pore volume and the special molecular sieve are cooperatively used, and through shaping and roasting crystal transformation, the protective agent has the advantages of high radial strength, high water absorption capacity, high polar oxide adsorption capacity and high deoxidization capacity, and oxygen-containing compounds in coal-to-oil heavy oil can be effectively removed; the service life of the main catalyst is prolonged.

The present application relates to the technical field of rare and endangered pheasant protection and breeding, and discloses a method for effectively improving the hatching rate of wild yellow-bellied pheasant, which comprises the following steps: 1, moderately supplementing with interchanging wood; 2, making bionic artificial bird nests; 3, selecting nesting trees; 4, putting the bionic artificial bird nests; 5, installing infrared cameras; 6, thinning and pruning the connection between the nesting trees and surrounding trees; 7, installing monitoring equipment; 8, installing anti-snake plastic film; 9, making snake catching cages; and 10, putting the snake catching cages in the late hatching period. The present application has the beneficial effect of effectively improving the hatching rate of wild yellow-bellied pheasant and providing strong guarantee for the population development and growth of the wild yellow-bellied pheasant.

This utility model discloses a bird-repelling device based on a wide-area ultrasonic wave-based environment that deters birds, belonging to the field of environmental bird-repelling technology. It includes a main body box and ultrasonic modules. Two sets of ultrasonic modules are fixedly installed inside the main body box. A bird-repelling component is installed on the top of the main body box, and a fixing component is installed on the back of the main body box. This utility model utilizes the designed bird-repelling component, which, when blown by wind, rotates a push plate, causing the ribbons to flutter and reducing the likelihood of birds nesting in the area. Furthermore, the reflections from different surfaces create a multi-directional, more chaotic glare effect, enhancing the bird-repelling effect. Combined with the internal connecting ropes and connecting plates that generate knocking sounds to drive away birds, the staggered frequency ranges of the sounds produced by each connecting plate can cover as many sound frequencies as possible, creating an irregular sound effect. The combined use of multiple bird-repelling methods greatly improves the bird-repelling effect.

The utility model discloses a bird -nest type nursing pillow for newborn, relate to nursing pillow technical field, including the enclosure part, the lower part of enclosure part is provided the wrapping part, the inside of enclosure part is sewed and has the pillow, the inside of enclosure part and wrapping part all is provided with the filling material, the extension assembly is set in the connecting place of enclosure part and wrapping part. The utility model has the beneficial effect that: when nursing the newborn, utilize the extension assembly between the enclosure part and the wrapping part, can realize multi -gear adjustment, can accurate adaptation newborn of different growth stage, effectively prolongs the use cycle, and the pillow of integrated sewing and the inwardly inclined arc enclosure part jointly act, not only reliable fixation newborn body position, ensure that the air passage is unobstructed, still can effectively avoid the problem that bird -nest is easy to deform, significantly reduce the nursing burden, and the whole fabric all adopts multilayer composite fabric and high resilience filling material, has good anti -seepage and durability.

1. Name of this design product: Visual Bird Nest (Fixed Model). 2. Purpose of this design: Bird nests for birds to roost in. 3. The key design feature of this product is its shape. 4. The image or photograph that best illustrates the design's key points: 3D rendering 2.

The invention provides an anti-nest thread trimming device and method and a sewing machine, and relates to the technical field of sewing machines, the anti-nest thread trimming device comprises a machine needle and a driving cutter, the driving cutter is arranged below a sewing material, and the machine needle is movably arranged between the upper portion and the lower portion of the sewing material; the driving cutter is provided with a thread passing hole, a first cutting edge and a first thread clamping part; the driving cutter is provided with a first position for the machine needle to penetrate through the thread passing hole to conduct first needle sewing and a second position for the machine needle and the driving cutter to be staggered to conduct follow-up sewing. The auxiliary moving cutter is provided with a second cutting edge; after first needle sewing is completed, the machine needle moves to the side, away from the thread passing hole, of the sewing material, and the first thread clamping part and the side, provided with the second blade, of the auxiliary movable cutter clamp the upper thread; after at least second needle sewing is completed, the auxiliary moving cutter moves to the position where the second cutting edge is in butt joint with the first cutting edge so as to cut off the upper thread. By means of the technical scheme, the problem that nest-shaped thread ends are likely to be generated in the thread trimming process of a sewing machine in the prior art can be effectively solved.

1. The name of the design product: bird nest (with tray can pull out iron mesh). 2. The use of the design product: bird nest for birds to live. 3. The design points of the design product: in shape. 4. The picture or photo that best indicates the design points: perspective drawing.

The invention provides a transmission tower occupation bird repelling device based on an unmanned aerial vehicle platform, and relates to the technical field of electric power overhaul. The device comprises an unmanned aerial vehicle, a filling subassembly and a mounting hanger. The filling subassembly comprises a housing, a driving motor, a speed reducer and two parallel driving racks are arranged in the housing, and the driving racks penetrate through the housing and can slide in a reciprocating mode relative to the housing. A driving gear and a driven gear which are meshed with each other are arranged between the two driving racks, the driving gear is meshed with one driving rack, the driven gear is meshed with the other driving rack, and the driving gear is connected with the power output end of the speed reducer. A glue barrel seat used for bearing a glue barrel is arranged on one side of the housing, and a push disc used for pushing a glue barrel piston is arranged at the end of the driving rack. And the pushing disc is used for filling the fillers in the glue barrel into the bird nest, so that the space in the bird nest is occupied, and the bird nest loses the use function. The device not only can achieve a bird repelling effect, but also is low in operation difficulty and high in working efficiency.

The utility model discloses a synthetic electric field intensity detection and early warning device, relates to the technical field of electric field detection, and aims to solve the problems that a conventional electric field intensity detection and early warning device is mounted on a stand column, birds are easy to nest on the detection device when the device is used outdoors, and related power supply equipment is required to supply power to the detection device. According to the scheme, the device comprises a stand column, an electric field detection probe is installed at the top of the stand column, an instrument box is arranged on one side of the stand column, a lifting plate is arranged at the top of the instrument box, a lifting motor is installed at the bottom of the lifting plate, a telescopic block is arranged in the lifting plate, a sliding block is installed at the end of the telescopic block, and a telescopic rod is arranged on one side of the telescopic block; the outer sides of the telescopic rods are sleeved with limiting springs, and a solar panel is arranged at the top of the box body door. The device is novel in structure, solar energy is adopted to supply power to the detection device, meanwhile, the solar panel can be adjusted according to the irradiation angle of sunlight, and the situation that flying birds nest is effectively prevented.

The invention relates to the technical field of electric power operation and maintenance, in particular to an unmanned aerial vehicle self-positioning bird nest target locking method based on machine vision recognition, and aims to solve the problems of high manual dependence, low recognition precision, inaccurate positioning and high safety risk in traditional bird damage prevention and control. The method comprises the following six steps: S1, planning a route; s2, the unmanned aerial vehicle autonomously flies according to a route and synchronously collects multi-view images; s3, image preprocessing and distortion correction are carried out, a Faster R-CNN model is adopted to identify a suspected nest, and secondary verification is carried out in combination with morphology and thermal imaging features; s4, similar triangles, multi-view geometry and a PnP algorithm are fused to solve three-dimensional coordinates of the bird nest; s5, automatically locking the target, and returning information to the ground control station; and S6, recording data and updating the model, and generating a bird damage risk thermodynamic diagram. The bird nest recognition, positioning and locking full-process automation is realized, the recognition precision and the flight safety are improved, an intelligent operation and maintenance closed loop is constructed, and the method is suitable for bird damage prevention and control of power transmission lines of various voltage grades.

The invention relates to the technical field of wire feeding devices, in particular to a wire feeding device for spiral steel pipe welding. According to the wire feeding device for welding of the spiral steel pipe, the distance between the wire feeding wheels can be adjusted in a self-adaptive mode according to the diameter of a welding wire, and the bird nest phenomenon of the welding wire caused by too large pressure of the wire feeding wheels is avoided. A wire feeding device for spiral steel pipe welding comprises a first shell, a second shell and the like, and the rear side of the first shell is detachably connected with the second shell through a plurality of bolts. When a welding wire enters the position between the first shell and the second shell, guide frames are extruded to be away from each other, connecting supporting frames are away from each other, then connecting rods rotate, butt joint columns are pushed to move to be away from each other, wire feeding wheels are away from each other, and therefore the distance between the wire feeding wheels can be adjusted in a self-adaptive mode according to the diameter of the welding wire; and the welding wire'nest 'phenomenon caused by overlarge pressure of the wire feeding wheel is avoided.

The invention relates to the technical field of electric power operation and maintenance equipment, in particular to an airborne folding bird nest cleaner. Comprising a gear motor, a fixing part, a transmission part and a folding structure, the fixing part comprises a central connecting rod and a multi-layer fixing frame; the upper end of the central connecting rod is fixedly connected with the unmanned aerial vehicle, and the lower end is fixedly connected with the top of the multi-layer fixing frame; the speed reducing motor is fixedly mounted on the fixing part; the two ends of the folding structure are hinged to the multi-layer fixing frame and the transmission part respectively. The gear motor drives the transmission part to rotate around the central connecting rod; and the transmission part drives the folding structure to expand outwards or contract inwards. The device is carried on the unmanned aerial vehicle, the unmanned aerial vehicle can fly to the bird nest position, manual tower climbing is not needed, single bird nest clearing operation can be completed in a short time, the operation efficiency is greatly improved, and the problem that traditional manual tower climbing clearing consumes long time is solved. Meanwhile, power failure is not needed in the clearing process, power supply reliability is not affected, and stable operation of a power system is guaranteed.

1. Name of the designed product: purple clay pot (tree stone bird nest). 2. Use of the designed product: for tea set. 3. Design points of the designed product: in shape. 4. Picture or photo that best shows the design points: perspective view 1. 5. The bottom of the designed product is the part that is not easy to see or cannot be seen during use, so the top view is omitted.

The invention discloses an anti-nesting self-adaptive protection method and system for a power transmission line, and relates to the technical field of power transmission line protection. The method comprises the following steps: deploying multiple sensors at key parts of a power transmission line tower, and constructing a sensing network to detect bird activity data flow in real time; calling the nesting threat evaluation dual-channel through an edge calculation unit, carrying out the recognition evaluation of the data flow, and outputting a threat parameter; analyzing the threat parameters based on a bird nesting protection strategy library, and determining a target protection strategy; and according to the strategy parameters, a nesting blocking and expelling linkage device is controlled, and self-adaptive feedback protection is carried out on the tower. The technical problems of short circuit, tripping and other potential safety hazards caused by bird nesting to the safety of the power transmission line are solved, bird activities are accurately detected in real time through a multi-mode sensing network, nesting behavior recognition and threat degree quantification are completed in combination with edge calculation dual-channel evaluation, the risk of short circuit tripping of the line is reduced, and the safety of the power transmission line is improved. And the operation reliability and the intelligent operation and maintenance level of the power transmission line are improved.

The application provides a control method and a control system for preventing needle breakage of a bird nest thread trimming mechanism of a sewing machine. The method comprises: obtaining an upper needle position calibration angle parameter during use of an electric control of the sewing machine; comparing the upper needle position calibration angle parameter during use of the electric control with an upper needle position calibration angle parameter during factory shipment of the electric control to generate a comparison result; analyzing a deviation degree of the two upper needle position calibration angle parameters according to the comparison result; and generating a control instruction of a bird nest thread trimming stepping motor based on the deviation degree. The application can protect the electric control system of the sewing machine by analyzing the upper needle position calibration angle parameter generated during each actual operation, so as to prevent needle breakage and puncher collision.

The utility model relates to the technical field of sewing machines, in particular to a thread trimming mechanism of a sewing machine. A movable knife is fixedly connected to a movable knife rest, the movable knife rest is rotatably arranged on a lower shaft in a sleeving mode, the movable knife rest is hinged to a connecting rod, the connecting rod is hinged to a crank, the crank is fixed to an output shaft, the output shaft is connected with a thread trimming driver, and the thread trimming driver outputs power to drive the output shaft to rotate. The rotating shuttle is provided with a thread hooking hook, the movable cutter is provided with a thread hooking part and a thread trimming part, the thread hooking hook is located on the outer side of the thread hooking part, and the thread trimming part is located behind the thread hooking part. The working efficiency is improved, the sewn stitch is attractive, and the sewing quality is improved.

The application provides a kind of random scheduling method for ship maintenance task under milestone constraint, and relates to task scheduling technical field.The application obtains the data of the task to be scheduled in project, encodes the task to be scheduled, and generates a task list;process the task list based on heuristic rules and probability selection method, and generate an initial population;use the initial population as an initial bird nest, minimize the maximum completion time and minimize the delay cost as the goal, optimize the initial bird nest by improved discrete valley bird search algorithm, and obtain the optimal solution;the application takes minimizing the maximum completion time and minimizing the delay cost of task as the goal, studies the task scheduling method of time-varying task duration and resource demand under milestone task, and proposes several heuristic rules based on the characteristics of milestone task and random scheduling.It fills the gap in current research, and obtains a task scheduling scheme of high-end equipment manufacturing that is more in line with the actual production situation.

The invention relates to the technical field of power transmission line equipment, in particular to an intelligent supervision bird nest device for a live line. Comprising a power generation mechanism, a self-adaptive direction adjusting mechanism and a bird repelling module. Wherein the power generation mechanism comprises a photovoltaic panel, and the photovoltaic panel is electrically connected with a storage battery through a power adapter; the bird repelling module comprises a sound alarm electrically connected with the storage battery; the direction adjusting mechanism comprises a base, an opening is formed in the middle of the top of the base, and a rotating column is rotationally arranged in the opening; a large gear disc and a platform are sequentially and fixedly arranged above the rotating column; a motor is arranged above the base, and a motor shaft of the motor is sleeved with a small gear disc meshed with a gear of the large gear disc. A photovoltaic panel is arranged on the platform; the direction adjusting mechanism is used for changing the orientation of the photovoltaic panel through rotation of the motor.

The invention discloses an anti-bird-nest thread trimming structure and a control method in the technical field of anti-bird-nest thread trimming. The anti-bird-nest thread trimming structure comprises a bottom plate, a thread trimming cam, an auxiliary cutter thread trimming shaft, a thread trimming auxiliary cutter frame, a movable cutter thread trimming shaft and a thread trimming main cutter frame, the auxiliary cutter trimming shaft is mounted above the trimming cam and is in transmission connection with the trimming auxiliary cutter rest; the movable cutter trimming shaft is rotatably arranged on the auxiliary cutter trimming shaft in a sleeving manner and is in transmission connection with the trimming main cutter rest; an auxiliary cutter thread trimming track groove in transmission connection with the auxiliary cutter thread trimming shaft and a movable cutter thread trimming track groove in transmission connection with the movable cutter thread trimming shaft are formed in the end face of the thread trimming cam, and when the thread trimming cam rotates, the movable cutter and the auxiliary movable cutter can be driven to act and perform thread trimming action during sewing starting and thread trimming ending, so that sewing starting thread trimming and sewing thread trimming are realized; and residual thread ends of the sewing material are shorter and more stable, so that better sewing quality is achieved.

The present application relates to a kind of automatic shearing mechanism of bird nest prevention, including seat and needle plate, the seat is provided with driving mechanism, transmission mechanism and clamping and shearing mechanism, driving mechanism drives clamping and shearing mechanism to act by transmission mechanism, seat is fixedly connected in the bottom of needle plate by the connecting portion of top setting;The clamping and shearing mechanism includes moving knife, fixed knife and blade spring, fixed knife is fixed on seat, moving knife is movably arranged on seat, moving knife front portion is provided with machine needle avoiding hole, the pressure rod of blade spring is abutted on moving knife front portion upper surface, moving knife rear portion is through transmission mechanism with driving mechanism, driving mechanism drives moving knife to move with three-stage stroke structure;The present application first clamps thread end when starting to stitch, and the excess thread end is cut after needle is stable, it plays the effect of better bird nest prevention and thread dropping prevention, and thread end clamping is executed by elastic mechanism, not by yarn fine restriction, with the characteristics of structure reasonable, stitch beautiful, good reliability, strong applicability.