66 results about "Industrial sewing machine" patented technology

The invention relates to the technical field of machine vision and industrial automation, and discloses an industrial sewing machine stitch defect detection and self-adaptive compensation method based on machine vision. The technical problems that stitch quality control of an existing industrial sewing machine depends on manpower, efficiency is low, and defects cannot be intervened in real time are solved. After synchronously capturing a stitch image, segmenting a stitch graph through image processing; extracting quality data of the stitch length and the average width value from the graph; comparing the quality data with preset parameters to diagnose defect types; a compensation instruction is generated according to the diagnosed defect type, and the cloth feeding speed and the upper thread tension of the sewing machine are adjusted in real time. By extracting the geometrical characteristics of the stitches and performing quantitative analysis, the defects of stitch skipping, non-uniform stitch length and abnormal stitch tightness are automatically identified; by establishing a closed-loop feedback mechanism of defect types and specific compensation actions, the follow-up stitches are rectified in real time, so that the defective rate is reduced, and the manual dependence is reduced.

The utility model relates to the technical field of industrial sewing machines, and discloses an industrial sewing machine convenient to replace threads, which comprises a base, a sewing machine body is arranged on the outer side of the base, and a needle seat is arranged on the outer side of the sewing machine body; according to the needle plate seat, the gear is rotated clockwise to drive the clamping block on the needle plate seat body to be clamped in the clamping groove to close the groove, the gear is rotated anticlockwise to open the needle plate seat body, and internal bottom threads are taken out and rapidly replaced; the needle plate seat body cannot be easily opened to influence the use of the sewing machine, the cover plate is opened, the connecting rod is pulled out of the sleeve, then the sleeve is turned over to pull the inserting rod out of the sleeve, the thread end is inserted into the elastic steel bar, and then the elastic steel bar and the thread end are inserted into the needle head together. Therefore, the needle head can be quickly inserted into the hole of the needle head, so that the thread end is inserted into the needle head.

The cutting equipment for industrial sewing machine accessory production comprises a supporting table, a clamp guide rail is fixedly connected to the top of the supporting table, a supporting plate is fixedly connected to the side, away from the clamp guide rail, of the supporting table through bolts, and a mounting frame is fixedly connected to the top of the supporting plate; and the inner side of the mounting frame is fixedly connected with a driving motor, and the output end of the driving motor is fixedly connected with a hollow rotating shaft. According to the equipment, the protection assembly is arranged, the protection shell and the dust collection shell are always kept in a negative pressure environment, dust collected in the equipment can be sucked into a telescopic pipe and then enters the filtering assembly to be collected, dust generated by cutting is sucked in time, the dust is prevented from escaping into the surrounding environment, and the dust is collected into the filtering assembly in time; and secondary pollution caused by flying of dust due to equipment vibration and the like after the dust is accumulated in the protective shell and the dust collecting shell is avoided.

The invention discloses an industrial sewing machine equipment maintenance method, device and equipment and a storage medium, is applied to an intelligent management platform of industrial sewing machine equipment, and relates to the technical field of garment manufacturing. Triggering fault early warning corresponding to the fault sewing machine equipment based on the analysis result; determining a skill matching degree based on the degree of familiarity of each maintainer to the faulty sewing machine equipment and a historical repair success rate, and determining a preset order sending algorithm based on a fault weight corresponding to the faulty sewing machine equipment, the skill matching degree corresponding to each maintainer, the distance between each maintainer and the faulty sewing machine equipment and the fault weight; and determining a target maintainer corresponding to the faulty sewing machine equipment based on the fault early warning by using a preset order sending algorithm, and notifying the target maintainer to maintain the faulty sewing machine equipment. And equipment fault discovery and maintenance delay can be avoided.

The invention particularly relates to an industrial sewing machine thread trimming device and a control method thereof.The thread trimming device comprises a fixed cutter and a movable cutter, the movable cutter is installed on a support and can slide, an upper thread and a bottom thread are hooked to the fixed cutter to complete thread trimming operation, in the process, the movable cutter enables a needle head to be placed in a hook-shaped structure on the movable cutter through the receding action, and the needle head is fixed to the fixed cutter; according to the thread trimming cutter, the hook-shaped structure of the movable cutter is sleeved with an upper thread, the movable cutter is driven by the arranged driving assembly to make contact with the fixed cutter to complete thread trimming, the movable cutter has the buffering allowance in the retraction process, a needle head can be prevented from being broken, meanwhile, a misoperation protection mode is arranged, and timely shutdown can be guaranteed when the needle head abuts against the movable cutter; in addition, the elastic component is arranged to play a role in buffering the impact load generated when the movable cutter makes contact with the fixed cutter, and the reliability of thread trimming operation can be further improved by increasing the action borne by the support.

The utility model relates to an industrial sewing machine which comprises an operation table and a sewing machine body, and further comprises two fixed battens, two fixed battens, two fixed battens and two fixed battens, wherein the two fixed battens are respectively arranged on two sides of the top of the operation table; the tightening mechanism is installed at the top ends of the two fixed battens and comprises an electric telescopic cylinder, the fixed battens are installed at the bottom of the electric telescopic cylinder, the bottom of the electric telescopic cylinder penetrates through the fixed battens to be fixedly provided with a concave plate, a motor is installed on one side of the concave plate, and one side of the motor is connected with a motor shaft; the tightening roller is arranged in the concave plate, the tightening roller can rotate towards the outer side through the two rotating pipes, the two sides of cloth and the two sides of a blanket can be driven to move towards the two sides respectively, and the cloth and the blanket are leveled; the concave plate and the tightening roller can be driven to move downwards through the electric telescopic cylinder, cloth or blankets with different thicknesses can be fixed, and adjustability is improved.

The utility model relates to the field of industrial sewing machines, and discloses an industrial sewing machine anti-static device which comprises a bottom plate, a sewing machine body, an anti-static mechanism and cloth. Four supporting plates are fixedly connected to the bottom plate, the tops of the four supporting plates are fixedly connected with the same workbench, the sewing machine body is arranged on the workbench, a through hole is formed in the workbench, and the cloth penetrates through the through hole and corresponds to the sewing machine body. Two mounting grooves are formed in the workbench, and anti-static mechanisms are arranged in the two mounting grooves and correspond to the cloth; the anti-static mechanism comprises a shell, a positive plate, a negative plate, a spray point and a control module. Compared with the prior art, the static electricity removing device has the advantages that the effect of rapidly removing static electricity on the cloth can be achieved through cooperation of all the components, the static electricity removing effect is greatly improved, and the static electricity removing device is simple and convenient in structure and higher in practicability.

The invention relates to a motor of an industrial sewing machine, wherein a stator and rotor assembly wound with aluminum wire is arranged in a front shell, which effectively reduces manufacturing costs; a rear cover is provided at the opening of the front shell, and one end of a rotating shaft extends from the rear cover and is connected to a fan blade; a control circuit board is provided in the rear shell, and a front cover is provided at the opening of the rear shell; an air inlet is provided at the side end of the rear shell, a front air guide hole is provided in the middle of the front cover, and a rear air guide hole is provided in the rear cover. After the rear shell is closed on the front shell, an air outlet gap is formed at the edge of the opening and a heat dissipation cavity for accommodating the fan blades is formed between the front cover and the rear cover, the front air guide hole and the rear air guide hole are respectively communicated with the heat dissipation cavity, and the air outlet gap is communicated with the heat dissipation cavity; the rotating shaft drives the fan blades to rotate so that wind enters the rear shell from the air inlet and brings the heat of the control circuit board into the heat dissipation cavity through the front air guide hole, while the heat of the stator and rotor assemblies is brought into the heat dissipation cavity through the rear air guide hole, and the wind in the heat dissipation cavity is discharged from the air outlet gap, thereby realizing true convection heat dissipation.

The invention discloses a cloth pressing mechanism for an industrial sewing machine, and relates to the field of sewing machines, the cloth pressing mechanism comprises a fixing plate mounted on a rack of the industrial sewing machine, and further comprises two clamping mechanisms used for pressing cloth, the two clamping mechanisms are both mounted on the fixing plate, and each clamping mechanism comprises an upper pressing roller, a lower pressing roller and a driving mechanism A; rotating shafts at the two ends of the lower pressing roller are rotationally connected with the fixing plate, and the two ends of the upper pressing roller and the lower pressing roller are connected with a driving mechanism A; according to the cloth pressing mechanism for the industrial sewing machine, the two clamping mechanisms are symmetrically arranged on the fixing plate, each clamping mechanism comprises an upper pressing roller and a lower pressing roller, gear transmission in the A driving mechanism and linkage of a connecting rod assembly are achieved, it is guaranteed that the upper pressing rollers and the lower pressing rollers rotate synchronously and reversely, and the rotating speed is consistent; power is transmitted to the upper pressing roller through gear meshing, relative sliding of multiple layers of cloth caused by friction force difference is avoided, and wrinkles are effectively eliminated.

1. Name of the product in this design: Panel (Display screen 2). 2. Purpose of this design: An embedded panel for controlling the operation of an industrial sewing machine. 3. The key design feature of this product is its shape. 4. The image or photograph that best illustrates the design's key features: the front view.

The industrial sewing machine (2) comprises: a main body (30) for sewing objects; a communication unit (15) for receiving authentication result data (60) from a communication terminal; a storage unit (13B) for storing registration data (70) that associates the authentication result data (60) with an account; and a control unit (13A) for managing permissions corresponding to the account. The control unit (13A) compares the authentication result data (60) received from the communication terminal (5) with the registration data (70).

The invention discloses anti-deviation industrial sewing machine accessory welding equipment, and belongs to the technical field of welding, the anti-deviation industrial sewing machine accessory welding equipment comprises a bottom plate, one end of the bottom plate is fixedly provided with a supporting frame, the supporting frame is rotatably provided with a clamping mechanism, the other end of the supporting frame is fixedly provided with a welding mechanism, the base is further fixedly provided with a supporting table, and the supporting table is slidably provided with a pushing mechanism; a welding platform is arranged at the position, above the supporting table, of the bottom plate, a material taking mechanism is arranged above the welding platform, a discharging mechanism is arranged below the material taking mechanism, the welding mechanism comprises a welding head arranged in a rotating mode, the welding platform comprises a welding table, an adsorption mechanism is arranged on the welding table in a sliding mode, and the material pushing mechanism comprises a rectangular lifting plate arranged in a sliding mode. The material taking mechanism comprises an electric clamping jaw arranged in a sliding mode.

The utility model belongs to the technical field of industrial sewing machines, and particularly relates to an industrial sewing machine. The sewing machine body is arranged on the workbench and located on the other side of the workbench; the mounting frame is arranged on the workbench, and a limiting cylinder used for winding a sewing thread is arranged in the middle of the mounting frame; the placing structure is arranged at the top of the mounting frame and is used for sleeving and fixing the bobbin; wherein the placing structure comprises a sleeving assembly and a fastening assembly, and the fastening assembly is arranged to be capable of gradually expanding the sleeving assembly when the fastening assembly is gradually screwed. The placement structure has the beneficial effects that the sleeving assembly and the fastening assembly are combined, and the fastening assembly is designed to be capable of pushing the sleeving assembly to be gradually expanded in the gradual screwing process, so that the sleeving assembly is tightly attached to the inner wall of the bobbin. By means of the design, the installation process is simplified, stable installation of the bobbin can be achieved by directly screwing the fastening assembly, the installation efficiency is greatly improved, and operation steps are reduced.

The utility model relates to an automobile seat cover sewing auxiliary clamp which comprises a fixed bottom plate used for being installed on a table top of an industrial sewing machine, a supporting guide rail is horizontally arranged above the fixed bottom plate, and a sliding support is connected to the supporting guide rail in a sliding mode. A seam allowance positioning block which extends downwards and is used for positioning a seam allowance is arranged at one end of the sliding bracket. The clamp is simple and reasonable in structural design, when the clamp is used, the clamp is installed on a table top of an industrial sewing machine for sewing the automobile seat cover, the needed seam allowance width is adjusted through the sliding support, then a cutting piece is fed into a sewing position to be sewn, and the seam allowance of the cutting piece is tightly attached to the seam allowance positioning block to conduct sewing operation. During sewing, the phenomena of different widths of cut piece seam allowances and left-right skewing and twisting of sewing threads are avoided, and when sewing personnel are assisted to sew and fold edges, edge folding errors are reduced, the sewing efficiency is improved, the defective rate is reduced, the seat attractiveness is improved, the seat production efficiency is improved, and meanwhile the labor cost can be reduced.

The invention relates to the technical field of sewing machine bottom line monitoring, in particular to an industrial sewing machine bottom line monitoring method and system. A full-thread shuttle peg is used for teaching in an actual sewing environment, the dynamically measured full-capacity needle number truly reflects the actual sewing capacity under the combination of specific threads and cloth, systematic errors caused by inaccurate presetting are eliminated, and follow-up early warning is targeted; through the collaborative analysis of the comprehensive main shaft rotation angle, the needle pulse, the tension signal and the photoelectric signal, the system can distinguish effective sewing, needle skipping, thread breaking and normal operation pause in a high-precision mode, counting errors or teaching interruption caused by misjudgment of a sensor are avoided, and the purity of effective sewing needle number data is ensured. Based on a dynamic full-capacity needle number early warning mechanism, accurate needle replacement reminding can be provided before a bottom thread is really used up, the product quality and consistency are improved, meanwhile, unnecessary shutdown and production interruption are reduced, and the production efficiency and intelligent management level of industrial sewing are comprehensively improved.

The application discloses a hidden cover production industrial sewing machine speed regulator, which comprises a mounting seat, a base is mounted on the outer side wall of the mounting seat, a plurality of threaded mounting holes are uniformly formed in the base, a through groove is formed in the mounting seat, a rotating frame is rotationally connected in the mounting seat, a placing frame is fixedly connected in the mounting seat, and a moving frame is slidably connected to the placing frame and the mounting seat. The application further discloses a hidden cover production machine, which comprises a base, a plurality of support rods are vertically arranged on the upper surface of the base, the upper ends of two adjacent support rods are jointly provided with a connecting rod, and two cross rods are jointly arranged between the two connecting rods. The application has the advantages of ingenious structure, convenient use, small size, high installation stability, suitability for different types and models of industrial sewing machines, convenience in adjusting the position and direction of installation, convenience in batch production and reduction of production cost to a certain extent.

The invention discloses an automatic lining cutting and ironing device, which relates to the technical field of garment production and comprises a base, an industrial sewing machine and a support. A traction driving module, a cutting module, a pressing module, a pressing module, a jacking module and a lining cloth roll are arranged on the support. The traction driving module is used for automatically pulling the lining cloth; the lining cloth is cut into small fixed-length sections by the cutting module; the material jacking module bears and lifts the cut-parts; the pressing module is used for pressing the cut-parts during pressing; the pressing module is used for performing hot-pressing bonding on the lining cloth and the cut-parts; and finally sewing the two by an industrial sewing machine. Through collaborative operation of all the modules, automation of the whole process from lining cloth conveying, fixed-length cutting, cut-part alignment, pressing and fixing to sewing is achieved, the traditional operation mode of manual picking, placing and lining cloth ironing is thoroughly replaced, and the problems that in the prior art, production efficiency is low, and labor input is large are effectively solved.

1. Name of the product in this design: Graphical User Interface for Operating Systems of Electronic Devices. 2. Purpose of this design: To be used as an operation panel on a sewing machine for operation and information display. 3. The key design features of this product are its graphical user interface and display graphics. 4. The image or photograph that best illustrates the design's key points: the front view. 5. Purpose of the graphical user interface: The interface of this application is mainly used to control industrial sewing machine equipment.

The utility model discloses a high-speed rotating shuttle for an industrial sewing machine, which comprises a shuttle race, and the inner wall of the shuttle race is rotatably connected with a shuttle frame; the inner wall of the side face of the shuttle race is in threaded connection with a thread guide plate screw, and the outer wall of the thread guide plate screw is in sliding connection with a thread guide plate. Lubricating oil can be rapidly conveyed to friction interfaces of the shuttle frame, the shuttle race and the moon ring, abrasion of parts is effectively reduced, operation noise is lowered, and the service life is prolonged during high-speed rotation. The moon ring has good repeated disassembly and assembly stability through a downward pressing type fixing structure, the position of the moon ring groove can still be kept accurate after multiple times of disassembly and assembly, and meanwhile it is ensured that the shuttle frame keeps accurate axis movement during high-speed rotation through the rotating connection of the shuttle race and the shuttle frame and the moon ring limiting structure.

The invention discloses an industrial sewing machine processing welding device which comprises a base and is characterized in that a baffle is fixedly arranged on the upper wall of one side of the base, a side plate is fixedly arranged at the end, away from the baffle, of the base, a top plate is fixedly arranged on the side plate, and a first telescopic plate is slidably arranged on the lower wall of the top plate; a welding sleeve is fixedly connected to one end of the first telescopic plate, a moving control mechanism corresponding to the first telescopic plate is arranged on the top plate, a fixing table is fixedly connected to one side of the welding sleeve, and the fixing table is fixedly arranged on the welding sleeve through a fixing mechanism; an annular sliding groove corresponding to the electric control sliding block is formed in the inner wall of the welding sleeve, and the welding head is connected to the electric control sliding block. According to the device, the hand wheel of the sewing machine and the connecting sleeve of the machine body of the sewing machine can be accurately and rapidly attached and pressed, the operation of automatic circumferential welding is completed in the protective sleeve, and the safety during hand wheel welding is greatly improved.

The invention discloses an IGBT (Insulated Gate Bipolar Translator) device for an industrial sewing machine, which comprises a connecting mechanism, an IGBT device mechanism and mounting mechanisms, the IGBT device mechanism sleeves the top of the connecting mechanism, the mounting mechanisms are fixedly connected to the front side and the rear side of the top of the IGBT device mechanism, and each mounting mechanism comprises two mounting boxes; a first motor is fixedly connected to the outer side of an inner cavity of the mounting box, a worm is fixedly connected to the output end of the first motor, worm wheels are movably connected to the two sides of the bottom of the inner cavity of the mounting box through bearings, the inner sides of the worm wheels are meshed with the worm, a rotating pin is fixedly connected to the outer side of the top of each worm wheel, and the surface of each rotating pin is sleeved with a flat frame. The front face and the back face of the flat frame are slidably connected with the inner wall of the mounting box. According to the invention, the clamping plate penetrates into the limiting rod and then is matched with the cooling fan for heat dissipation, so that the phenomenon of low installation efficiency is avoided, the heat dissipation performance is not influenced, and the service life of the IGBT device is not influenced.

1. Name of the product in this design: Touch-screen control panel (sewing system). 2. Purpose of this design: To enable control of equipment via a touch screen, especially suitable for controlling sewing equipment such as industrial sewing machines. 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 view 1.

The utility model relates to the technical field of industrial sewing machines, in particular to an industrial sewing machine convenient to install and adjust, which comprises a sewing machine body, fixing components are symmetrically arranged on the left side face and the right side face of the sewing machine body, and an adjusting component is arranged at the bottom of the sewing machine body. According to the industrial sewing machine convenient to install and adjust, the fixing assembly is arranged on the industrial sewing machine convenient to install and adjust, during installation, the sewing machine body can be limited only by clamping a limiting block on the sewing machine body into a limiting frame, rotating a connecting block, enabling the fixing block to enter a clamping groove and then rotating by 90 degrees, installation is completed, and installation and disassembly are convenient; the threaded rod can be driven to rotate by rotating the adjusting button, the position of the adjusting plate can be adjusted through the adjusting block and the adapter block, and therefore the front-back position of the sewing machine body can be adjusted through the adjusting plate, the sewing machine can be adjusted according to the needs of a user during use, and use is more convenient.

The application provides a control method and system applied to an industrial sewing machine, relates to the technical field of sewing control, and comprises the following steps: in response to a sewing request, a target pattern file to be executed is read, the format identification of the target pattern file is identified, the target pattern file is parsed based on the format identification, needle trace data sequences are obtained, driving conversion processing is performed on the needle trace data sequences, motion control signals are obtained, auxiliary instruction information in the target pattern file is acquired, control instruction queues of the industrial sewing machine are generated based on the motion control signals and the auxiliary instruction information, and the execution mechanism of the industrial sewing machine performs a sewing operation based on the control instruction queues, so that the technical problem that the intelligent level of the industrial sewing machine is limited due to the poor file format compatibility, insufficient hardware computing power, difficulty in realizing high-reliability and self-adaptive pattern analysis and execution in the prior art is solved, and the intelligent level of the industrial sewing machine is improved.

1. Name of the design product: Computerized embroidery machine head (3520). 2. Use of the design product: The design product is used for the sewing parts of industrial sewing machines. 3. Design key points of the design product: Lies in the shape. 4. Picture or photo that best shows the design key points: Perspective view 1.

The invention belongs to the technical field of sewing machines, and particularly relates to a platform type feeding industrial sewing machine and a thread trimming method, the platform type feeding industrial sewing machine comprises a rack, a thread sweeping mechanism, a presser foot lifting mechanism and a thread trimming mechanism, and the thread trimming mechanism comprises a fixed cutter assembly, a movable cutter assembly and a thread clamping assembly; the fixed cutter assembly comprises a first driving motor, a first transmission assembly and a fixed cutter; the movable cutter assembly comprises a second driving motor, a second transmission assembly and a movable cutter; the thread clamping assembly is used for clamping thread ends on the surface of the movable cutter; one side of the movable cutter is hinged to the second transmission assembly, and the other side of the movable cutter is provided with a lead part; the head part of the lead part is a convex tip part, the tail part of the lead part is a thread hooking part, and a guide curved surface is arranged between the two parts; the lead part is provided with a movable blade part and a movable blade threading hole; the movable blade part is matched with the fixed blade and cuts off a sewing thread; in the rotating process of the movable cutter, the movable cutter threading hole passes through the position under the machine needle, in the sewing starting stage, the machine needle penetrates through the movable cutter threading hole and drives a sewing thread to move towards the thread clamping piece, and the thread clamping piece tightly presses a thread end penetrating through the movable cutter threading hole.

The invention discloses a presser foot assembly of an industrial sewing machine. When it is necessary to place cloth on a sewing machine table, a connecting rod is pressed downward by hand to rotate the connecting rod downward, thereby driving a limit rod to move downward until the limit rod abuts against the sewing machine table. At this time, the limit rod extends along the front and rear direction of the presser foot. At this time, the edge of the cloth is aligned with the limit rod, so that the placement direction of the cloth can be accurate and the cloth will not be skewed. The invention enables the cloth to be placed straight and not easily skewed when placed on the sewing machine table.

The utility model discloses a thread clamping and loosening device controlled by a stepping motor, which is used for being installed on an industrial sewing machine body and comprises the stepping motor, a fixed clamping plate, a sliding rod and a reset spring, the stepping motor is installed on the industrial sewing machine body, and the output end of the stepping motor is in transmission connection with a cam. The fixed clamping plate is installed on the industrial sewing machine body, the sliding rod can be transversely installed on the industrial sewing machine body in a sliding mode, one end of the sliding rod abuts against the outer circumferential face of the cam, and the other end of the sliding rod coaxially penetrates through the fixed clamping plate in a sliding mode and is connected with a movable clamping plate. The movable clamping plate and the fixed clamping plate are oppositely arranged, and the reset spring is arranged outside the sliding rod in a sleeving mode and arranged between one end of the sliding rod and the industrial sewing machine body. The utility model has the advantages of simple structure, low cost and high stability.

The application particularly relates to a thread trimming device of an industrial sewing machine and a control method thereof, the thread trimming device comprising a fixed blade and a movable blade, the movable blade is installed on a support and can slide, the thread trimming device hooks the top thread and the bottom thread to the fixed blade to complete the thread trimming operation, in the process, the movable blade is provided with a hook-shaped structure to place the needle in the hook-shaped structure on the movable blade, so that the top thread is sleeved on the hook-shaped structure of the movable blade, and the driving assembly is arranged to drive the movable blade to contact the fixed blade to complete the thread trimming, wherein the movable blade has a buffer margin in the retraction process, so that the needle is prevented from being broken, a misoperation protection mode is arranged, the needle, the rotating shuttle and the movable blade are stopped in time when the needle presses the movable blade, the action of the needle is interrupted, the needle is protected from being broken, in addition, the elastic component is arranged to buffer the impact load when the movable blade contacts the fixed blade, and the support is further subjected to the action, so that the reliability of the thread trimming operation is improved.

The utility model discloses a binding strip unreeling mechanism of an industrial sewing machine, which comprises an unreeling support arranged on one side of the industrial sewing machine, the front side of the unreeling support is rotatably connected with an unreeling shaft, the unreeling shaft is fixedly sleeved with a positioning disc, and the unreeling support is fixedly connected with a limiting assembly supported on the circumference of a cylinder through a fixing plate; the limiting assembly comprises a fixing cylinder fixedly installed on the fixing plate, limiting balls are movably embedded in the lower portion of the interior of the fixing cylinder, compression springs used for supporting the limiting balls are arranged in the fixing cylinder, limiting grooves are formed in the circumference of the cylinder at equal intervals, and the limiting balls are movably clamped in the limiting grooves. The positioning disc is fixedly installed on the unwinding shaft, the elastic limiting ball of the limiting assembly abuts against the limiting groove of the positioning disc, continuous and slow unwinding can be achieved through the unwinding shaft and the edge covering strip reel, loose redundant unwinding edge covering strips are avoided, and the problem that the appearance is affected due to the fact that the edge covering strips are wrinkled is solved.