Trouser leg flanging and sewing device

Abstract

The device comprises an electric sewing machine and an edge seat, the edge seat is mounted on one side of the electric sewing machine, a movable seat is slidably connected to the top surface of the edge seat, a mounting frame is fixedly mounted on the top surface of the movable seat, a rotating frame is rotatably connected to the interior of the mounting frame through a bearing, and a rod hole is formed in the surface of the rotating frame; a supporting rod is slidably connected into the rod hole in a penetrating mode, and a circular plate is fixedly connected to the position, located on one side of the rotating frame, of the surface of the supporting rod. The device has the beneficial effects that the supporting rod, the rotating frame and the arc-shaped magnetic block are adopted, when the trouser legs are subjected to flanging and seam closing, trousers can be completely turned inwards and outwards, a trouser waist opening is connected to the outer side of one end of the supporting rod in a sleeving mode, trouser legs are connected to the rotating frame in a sleeving mode till the trouser legs are connected to the outer side of one end of the supporting rod in a sleeving mode, the trouser legs are opened through the supporting rod, and a worker can turn the trouser legs outwards; according to the device, the trouser legs do not need to be manually tensioned for stitching, the stitching process is high in automation degree and stitching efficiency, use is convenient and easy, and the working efficiency of stitching of the trouser legs is remarkably improved.

Description

Technical Field

[0001] The invention relates to the technical field of garment processing, in particular to a trouser leg cuff seaming device. Background Art

[0002] In the process of processing and making clothing, sewing is very important, which has a great impact on the quality of clothing. In particular, in the process of producing pants, the trouser legs need to be edged and sewn, but the existing trouser leg sewing device cannot fix the trouser legs, and the trouser legs need to be fixed manually during the sewing process, which not only wastes manpower, but also the sewing effect is directly affected by the skills and status of the staff, and the sewing speed is relatively slow.

[0003] After searching, it was found that the application number is CN202021727287.5, and the name is a trouser leg fast sewing device. The application proposes a trouser leg sewing device, which is to put the trouser leg on the outer surface of the arc plate by hand, fold the trouser leg so that the place to be sewn is located between the two fixed blocks, and then start the electric telescopic rod to lift the arc plate so that the outer surface of the arc plate and the outer surface of the elastic telescopic plate fit together, and then turn off the electric telescopic rod, start the sewing device to sew the trouser leg, and at the same time start the motor to drive the trouser leg to rotate, so that the sewing device can sew the trouser leg one circle. The trouser legs are fixed and the trouser legs are quickly hemmed and sewn. However, the sewing device used in the application only has the upper part, that is, the needle mounting structure. The sewing machine not only needs the needle mounting structure for sewing, but also needs to cooperate with the machine base under the needle to complete the entire sewing process of picking up and hooking the thread and completing the seaming operation. The application uses a curved plate that cannot be installed on the machine base of the sewing machine for work. It is difficult to complete the sewing operation by relying solely on the lifting of the needle, which seriously affects the work efficiency and can be further improved.

[0004] Currently, no effective solution has been proposed for the problems in the related technologies. Summary of the invention

[0005] 1. Technical issues to be resolved

[0006] In view of the deficiencies in the prior art, the present invention provides a trouser leg cuff seaming device, which has the advantages of improved work efficiency and ease of use, thereby solving the problems in the above-mentioned background technology.

[0007] (II) Technical solution

[0008] In order to achieve the above advantages of improved work efficiency and convenient use, the specific technical solutions adopted by the present invention are as follows:

[0009] The trouser leg cuffing and seaming device comprises an electric sewing machine and a side seat, wherein the side seat is installed on one side of the electric sewing machine, and the top surface of the side seat is slidably connected to the movable seat, and the top surface of the movable seat is fixedly installed with a mounting frame, the interior of the mounting frame is rotatably connected with a rotating frame through a bearing, and a rod hole is opened on the surface of the rotating frame, and a support rod is slidably connected through the rod hole, the surface of the support rod is located on one side of the rotating frame and is fixedly connected with a circular plate, and a spring is sleeved on the outside of the support rod between the circular plate and the rotating frame, and a ball head is fixedly connected to the other end of the support rod, and a driven gear ring is fixedly installed on the other side surface of the rotating frame, a stepping motor is fixedly installed on the top surface of the mounting frame, and a driving gear is installed on the output end of the stepping motor, and the driving gear is meshed with the driven gear, a rear end frame is fixedly installed on the bottom surface of the other side of the mounting frame through a cantilever frame, and an arc-shaped magnetic block is fixedly installed on the inner surface of the rear end frame opposite to the ball head position, side seats are fixedly installed at both ends of the base, and a screw rod is threadedly connected to the surface of the side seat at one end, and the other end of the screw rod is rotatably connected to the surface of one side of the movable seat through a rotating connecting seat.

[0010] Furthermore, the support rods are arranged in multiple groups at equal angles along the central axis of the rotating frame, and the surfaces of the support rods are roughened.

[0011] Furthermore, the surface of the ball head is polished and the ball head is made of iron.

[0012] Furthermore, a guide hole is provided on the surface of the movable seat below the rotating connection seat, and a guide rod is slidably connected through the guide hole, and both ends of the guide rod are fixedly connected to the side seat.

[0013] Furthermore, two ends of the spring are fixedly connected to the rotating frame and the circular plate respectively, and the spring is made of manganese steel.

[0014] Furthermore, the support rod, the circular plate and the ball head are coaxially arranged, and the support rod is an elastic metal rod.

[0015] Furthermore, the rotating frame, the mounting frame and the driven gear ring are coaxially arranged, and the driven gear ring is located outside the support rod.

[0016] Furthermore, a hand wheel is fixedly mounted on one end of the screw rod, and friction patterns are formed on the surface of the hand wheel.

[0017] Furthermore, the diameter of the support rod is smaller than the needle stroke of the electric sewing machine.

[0018] Furthermore, the guide rod is arranged in parallel with the lead screw, and the guide rod is a smooth metal round rod.

[0019] (III) Beneficial effects

[0020] Compared with the prior art, the present invention provides a trouser leg cuffing and seaming device, which has the following beneficial effects:

[0021] (1) The present invention adopts a support rod, a rotating frame and an arc-shaped magnetic block. When the trouser legs are turned up and sewn, the trousers can be completely turned inside out, the trouser waist opening is sleeved to the outside of one end of the support rod, and the trouser legs are sleeved in the direction of the rotating frame until the trouser legs are sleeved to the outside of one end of the support rod. The support rod opens the trouser legs, and the staff can turn the trouser legs outward. Subsequently, the staff can rotate the hand wheel to drive the screw rod to rotate, and then drive the moving seat to move toward the electric sewing machine until the trouser legs move to the outside of the sewing end of the electric sewing machine, and then start sewing. When starting to sewing, the stepping motor drives the driving gear to rotate, and then drives the driven gear ring to rotate, drives the rotating frame to rotate, drives the support rod to rotate, and then drives the trouser legs to rotate, drives the trouser legs to rotate, and the electric sewing machine sews the trouser leg turns. When the ball head at the other end of the support rod approaches the arc-shaped magnetic block, it is attracted by the magnetic force of the arc-shaped magnetic block, and the ball head moves and slides into contact with the arc-shaped magnetic block, pulling the support rod outward. When the support rod moves outward, the spring is compressed, and the support rod under the needle of the electric sewing machine can move outward to avoid the needle, thereby preventing the needle from colliding with the support rod. At the same time, it also prevents the support rod from being sewn to the trouser leg by the stitches. When the ball head rotates to leave the magnetic range of the arc-shaped magnetic block, the spring rebounds, driving the support rod to reset, and it can continue to play the role of supporting the trouser leg. The support rod rotated under the needle moves outward in turn to avoid the needle, completing a continuous seaming operation. The device does not require manual tightening of the trouser legs for seaming. The seaming process has a high degree of automation and high efficiency. It is easy and simple to use, which significantly improves the work efficiency of seaming the trouser legs.

[0022] (2) The present invention adopts support rods which are arranged in a circle. The support rods hold the trouser legs tight when closing the seams to prevent the trouser legs from moving randomly, thereby saving the trouble of workers pressing the edges. At the same time, since the trouser legs are in a stretched state, the workers can directly turn the trouser legs outward when turning them up. The turned edges will be firmly attached to the trouser legs due to the stretching effect, saving the trouble of workers manually pressing and positioning. At the same time, the workers can also adjust the turned edge width at will, further improving the convenience of use and improving work efficiency.

[0023] (3) The present invention adopts a screw and a hand wheel. The staff can turn the hand wheel to drive the screw to rotate, and then drive the moving seat to move stably. The distance adjustment is more delicate and reliable, which greatly improves the convenience of the staff in locating the sewing position and improves the seam accuracy. At the same time, the stepping frequency of the stepping motor is adapted to the angle of one rotation of the rotating frame, which is convenient for the rotation and positioning of the trouser legs, avoiding the problems of missed seams and over-seaming, further improving the seam accuracy and convenience of use. In addition, the present device does not require major improvements to the existing sewing machine, is compatible with a variety of machine models, has a wider range of uses, and further improves the convenience of use. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0025] Figure 1 is a schematic structural diagram of a trouser leg cuff seaming device according to an embodiment of the present invention;

[0026] Figure 2 is a front view of a trouser leg cuff seaming device according to an embodiment of the present invention;

[0027] Figure 3 is an enlarged view of node A of the trouser leg cuff seaming device according to an embodiment of the present invention;

[0028] Figure 4 is a schematic diagram of the front elevation structure of a mounting frame and a support rod according to an embodiment of the present invention;

[0029] Figure 5 is a schematic diagram of the installation of a rotating frame according to an embodiment of the present invention;

[0030] Figure 6 is a schematic diagram of the rear elevation structure of a mounting frame according to an embodiment of the present invention;

[0031] Figure 7 is a schematic diagram of installing an arc-shaped magnetic block according to an embodiment of the present invention;

[0032] Figure 8 is a schematic structural diagram of a brace according to an embodiment of the present invention;

[0033] Fig. 9 is a schematic structural diagram of a side seat according to an embodiment of the present invention;

[0034] Fig.10 2 is a schematic structural diagram of a mounting frame according to an embodiment of the present invention.

[0035] In the figure:

[0036] 1. Electric sewing machine; 2. Mounting frame; 3. Rotating frame; 4. Rod hole; 5. Support rod; 6. Stepping motor; 7. Bearing; 8. Driving gear; 9. Driven gear ring; 10. Ball head; 11. Base; 12. Guide rod; 13. Moving seat; 14. Lifting frame; 15. Rear end frame; 16. Arc magnetic block; 17. Screw rod; 18. Side seat; 19. Hand wheel; 20. Round plate; 21. Spring; 22. Rotating connecting seat; 23. Guide hole. DETAILED DESCRIPTION

[0037] To further illustrate each embodiment, the present invention provides drawings, which are part of the disclosure of the present invention and are mainly used to illustrate the embodiments and can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. With reference to these contents, ordinary technicians in the field should be able to understand other possible implementations and advantages of the present invention. The components in the figures are not drawn to scale, and similar component symbols are generally used to represent similar components.

[0038] According to an embodiment of the present invention, a trouser leg cuff closing device is provided.

[0039] The present invention is further described with reference to the accompanying drawings and specific embodiments. Figure 1-10As shown, the trouser leg cuffing and seaming device according to an embodiment of the present invention comprises an electric sewing machine 1 and a side seat 18, wherein the side seat 18 is installed on one side of the electric sewing machine 1, and the top surface of the side seat 18 is slidably connected to a movable seat 13, and a mounting frame 2 is fixedly installed on the top surface of the movable seat 13, and the mounting frame 2 is rotatably connected to a rotating frame 3 through a bearing 7 inside the mounting frame 2, and the bearing 7 is arranged in two groups to improve the rotation stability of the rotating frame 3, and a rod hole 4 is opened on the surface of the rotating frame 3, and a support rod 5 is slidably connected to the rod hole 4, and a circular plate 20 is fixedly connected to the surface of the support rod 5 on one side of the rotating frame 3, and a spring 21 is sleeved on the outside of the support rod 5 between the circular plate 20 and the rotating frame 3, and a ball head 10 is fixedly connected to the other end of the support rod 5, and the surface of the other side of the rotating frame 3 is fixed A driven gear ring 9 is installed, a stepper motor 6 is fixedly installed on the top surface of the mounting frame 2, and a driving gear 8 is installed on the output end of the stepper motor 6, and the driving gear 8 is meshed with the driven gear, which is a common driving structure. A rear end frame 15 is fixedly installed on the bottom surface of the other side of the mounting frame 2 through a cantilever frame 14, and an arc-shaped magnetic block 16 is fixedly installed on the inner surface of the rear end frame 15 facing the position of the ball head 10, and the curvature and radius of the arc-shaped magnetic block 16 match the rotation radius of the ball head 10. Side seats 18 are fixedly installed at both ends of the base 11, and a screw rod 17 is threadedly connected to the surface of the side seat 18 at one end, and the other end of the screw rod 17 is rotatably connected to the surface of one side of the moving seat 13 through a rotating connecting seat 22. When the trouser legs are turned up and sewn, the trousers can be completely turned inside out to make the trousers The waist opening is sleeved onto the outside of one end of the support rod 5, and the trouser legs are sleeved toward the rotating frame 3 until the trouser legs are sleeved onto the outside of one end of the support rod 5. The support rod 5 opens the trouser legs, and the staff can turn the trouser legs outside. Subsequently, the staff can rotate the hand wheel 19 to drive the screw rod 17 to rotate, and then drive the movable seat 13 to move toward the electric sewing machine 1 until the trouser legs move to the outside of the sewing end of the electric sewing machine 1, and then the seaming can begin. When the seaming begins, the stepping motor 6 drives the driving gear 8 to rotate, and then drives the driven gear ring 9 to rotate, drives the rotating frame 3 to rotate, drives the support rod 5 to rotate, and then drives the trouser legs to rotate, drives the trouser legs to rotate, and the electric sewing machine 1 sews the trouser leg turns, and when the ball head 10 at the other end of the support rod 5 approaches the arc-shaped magnetic block 16, it is attracted by the arc-shaped magnetic block. The magnetic adsorption effect of 16 causes the ball head 10 to move and slide into contact with the arc-shaped magnetic block 16, pulling the support rod 5 outward. When the support rod 5 moves outward, the spring 21 is compressed, and the support rod 5 located below the needle of the electric sewing machine 1 can move outward to avoid the needle, thereby preventing the needle from colliding with the support rod 5. At the same time, it also prevents the support rod 5 from being sewn to the trouser leg by the stitches. When the ball head 10 rotates to leave the magnetic force range of the arc-shaped magnetic block 16, the spring 21 rebounds, driving the support rod 5 to reset, and it can continue to play the role of supporting the trouser leg. The support rod 5 rotated below the needle moves outward in turn to avoid the needle, completing a continuous seaming operation. The device does not need to manually tighten the trouser legs for seaming. The seaming process has a high degree of automation and high seaming efficiency. It is easy and simple to use, and the work efficiency of seaming the trouser legs is significantly improved.

[0040] In one embodiment, a plurality of groups of support rods 5 are arranged at equal angles along the central axis of the rotating frame 3 to facilitate stretching the trouser legs, and the surfaces of the support rods 5 are roughened to increase the surface friction of the support rods 5, thereby increasing the stability of the trouser legs being tightened and fixed. The support rods 5 are arranged in a circle to tighten the trouser legs when closing the seams to prevent the trouser legs from moving at will, thereby saving the trouble of the staff in pressing the edges. At the same time, since the trouser legs are in a stretched state, the staff can directly turn up the trouser legs when turning them outward, and the turning up will be firmly attached to the trouser legs due to the stretching effect, saving the trouble of the staff in manually pressing and positioning. At the same time, the staff can also adjust the turning up width at will, further improving the convenience of use and improving work efficiency.

[0041] In one embodiment, the surface of the ball head 10 is polished and made of iron, which is convenient for the arc-shaped magnetic block 16 to be adsorbed. The ball head 10 with a smooth surface is convenient for sliding along the surface of the arc-shaped magnetic block 16 .

[0042] In one embodiment, a guide hole 23 is opened on the surface of the movable seat 13 below the rotating connecting seat 22, and a guide rod 12 is slidably connected to the inside of the guide hole 23, and both ends of the guide rod 12 are fixedly connected to the side seat 18, wherein the guide rod 12 is arranged parallel to the screw rod 17, and the guide rod 12 is a smooth metal round rod, and the guide rod 12 serves as a moving guide for the movable seat 13, so as to facilitate the stable movement of the movable seat 13.

[0043] In one embodiment, both ends of the spring 21 are fixedly connected to the rotating frame 3 and the circular plate 20 respectively, and the spring 21 is made of manganese steel. The spring 21 plays a connecting role to facilitate the reset of the support rod 5.

[0044] In one embodiment, the support rod 5, the circular plate 20 and the ball head 10 are coaxially arranged, and the support rod 5 is an elastic metal rod. The support rod 5 can tighten the trouser legs by its own elastic force, and is suitable for trouser legs of different calibers. When matching trouser legs of different calibers, the staff can change the height of the electric sewing machine 1 by adding a pad to the bottom surface of the electric sewing machine 1, so that the trouser legs can contact the base of the electric sewing machine 1 for sewing.

[0045] In one embodiment, the rotating frame 3 , the mounting frame 2 and the driven gear ring 9 are coaxially arranged, and the driven gear ring 9 is located outside the support rod 5 , so as to improve the stability of the rotation of the rotating frame 3 .

[0046] In one embodiment, a handwheel 19 is fixedly mounted at one end of the screw rod 17, and friction patterns are provided on the surface of the handwheel 19 to facilitate the staff to turn the handwheel 19. The staff can turn the handwheel 19 to drive the screw rod 17 to rotate, thereby driving the movable seat 13 to move stably, and the distance adjustment is more delicate and reliable, which greatly improves the convenience of the staff in locating the sewing position and improves the seam accuracy. At the same time, the stepping frequency of the stepping motor 6 is adapted to the angle of one rotation of the rotating frame 3, which is convenient for the rotation and positioning of the trouser legs, avoids the problems of missed seams and over-seaming, and further improves the seam accuracy and convenience of use. In addition, the device does not require major improvements to the existing sewing machine, is compatible with a variety of machine models, has a wider range of uses, and further improves the convenience of use.

[0047] In one embodiment, the diameter of the support rod 5 is smaller than the needle stroke of the electric sewing machine 1, further preventing the support rod 5 from touching the needle.

[0048] Working principle:

[0049] When the trouser legs are turned up and sewn, the trousers can be completely turned inside out, the trouser waist opening is sleeved onto the outside of one end of the support rod 5, and the trouser legs are sleeved toward the rotating frame 3 until the trouser legs are sleeved to the outside of one end of the support rod 5. The support rod 5 opens the trouser legs, and the staff can turn the trouser legs outside. Subsequently, the staff can rotate the hand wheel 19 to drive the screw rod 17 to rotate, and then drive the moving seat 13 to move toward the electric sewing machine 1 until the trouser legs move to the outside of the sewing end of the electric sewing machine 1, and then the sewing can begin. When the sewing begins, the stepping motor 6 drives the driving gear 8 to rotate, and then drives the driven gear ring 9 to rotate, drives the rotating frame 3 to rotate, drives the support rod 5 to rotate, and then drives the trouser legs to rotate. The electric sewing machine 1 sews the trouser leg hem together, and when the ball head 10 at the other end of the support rod 5 approaches the arc-shaped magnetic block 16, it is attracted by the magnetic force of the arc-shaped magnetic block 16, and the ball head 10 moves and slides into contact with the arc-shaped magnetic block 16, pulling the support rod 5 outward. When the support rod 5 moves outward, the spring 21 is compressed, and the support rod 5 located under the needle of the electric sewing machine 1 can move outward to avoid the needle, thereby preventing the needle from colliding with the support rod 5, and also preventing the support rod 5 from being sewn to the trouser leg by the suture. When the ball head 10 rotates to leave the magnetic range of the arc-shaped magnetic block 16, the spring 21 rebounds, driving the support rod 5 to reset, and it can continue to support the trouser leg and rotate to the needle. The support rod 5 under the head moves outward in sequence to avoid the needle head to complete the continuous seaming operation. The device does not need to manually tighten the trouser legs for seaming. The seaming process has a high degree of automation and high seaming efficiency. It is easy and convenient to use, which significantly improves the work efficiency of seaming the trouser legs. At the same time, the support rod 5 holds the trouser legs tight during seaming to prevent the trouser legs from moving at will, thereby saving the trouble of workers pressing the edges. At the same time, since the trouser legs are in a stretched state, the workers can directly turn up the edges when turning up the trouser legs. The turned edges will be firmly fitted with the trouser legs due to the stretching effect, saving the trouble of workers manually pressing and positioning. At the same time, the workers can also adjust the turned edge width at will to perform seaming. The convenience of use is improved in one step, and the work efficiency is improved. In addition, the staff can turn the hand wheel 19 to drive the screw rod 17 to rotate, and then drive the moving seat 13 to move stably. The distance adjustment is more delicate and reliable, which greatly improves the convenience of the staff in positioning the sewing position and improves the seam accuracy. At the same time, the stepping frequency of the stepping motor 6 is adapted to the angle of one rotation of the rotating frame 3, which is convenient for the rotation and positioning of the trouser legs, avoids the problems of missed seams and over-seaming, and further improves the seam accuracy and convenience of use. Moreover, the device does not require major improvements to the existing sewing machine, is compatible with a variety of machine models, has a wider range of uses, and further improves the convenience of use.

[0050] In the present invention, unless otherwise clearly stipulated and limited, the terms such as "installation", "setting", "connection", "fixation" and "screw-on" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements. Unless otherwise clearly defined, ordinary technicians in this field can understand the specific meanings of the above terms in the present invention according to the specific circumstances.

[0051] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A trouser leg cuffing and seaming device, characterized in that: The invention comprises an electric sewing machine (1) and a side seat (18), wherein the side seat (18) is installed on one side of the electric sewing machine (1), and a movable seat (13) is slidably connected to the top surface of the side seat (18), and a mounting frame (2) is fixedly installed on the top surface of the movable seat (13), and a rotating frame (3) is rotatably connected to the inside of the mounting frame (2) through a bearing (7), and a rod hole (4) is opened on the surface of the rotating frame (3), and a support rod (5) is slidably connected to the inside of the rod hole (4), and a circular plate (20) is fixedly connected to the surface of the support rod (5) located on one side of the rotating frame (3), and a spring (21) is sleeved on the outside of the support rod (5) between the circular plate (20) and the rotating frame (3), and a ball head (10) is fixedly connected to the other end of the support rod (5), A driven gear ring (9) is fixedly mounted on the other side surface of the rotating frame (3), a stepper motor (6) is fixedly mounted on the top surface of the mounting frame (2), and a driving gear (8) is mounted on the output end of the stepper motor (6), and the driving gear (8) is meshed with the driven gear, a rear end frame (15) is fixedly mounted on the bottom surface of the other side of the mounting frame (2) through a cantilever frame (14), and an arc-shaped magnetic block (16) is fixedly mounted on the inner surface of the rear end frame (15) facing the position of the ball head (10), side seats (18) are fixedly mounted on both ends of the base (11), and a screw rod (17) is threadedly connected through the surface of one end of the side seat (18), and the other end of the screw rod (17) is rotatably connected to the surface of one side of the moving seat (13) through a rotating connecting seat (22).

2. The trouser leg cuff closing device according to claim 1, characterized in that: The support rods (5) are arranged in multiple groups at equal angles along the central axis of the rotating frame (3), and the surfaces of the support rods (5) are roughened.

3. The trouser leg cuff closing device according to claim 1, characterized in that: The surface of the ball head (10) is polished, and the ball head (10) is made of iron.

4. The trouser leg cuff closing device according to claim 1, characterized in that: A guide hole (23) is provided on the surface of the movable seat (13) below the rotating connection seat (22), and a guide rod (12) is slidably connected to the inside of the guide hole (23), and both ends of the guide rod (12) are fixedly connected to the side seat (18).

5. The trouser leg cuff closing device according to claim 1, characterized in that: The two ends of the spring (21) are fixedly connected to the rotating frame (3) and the circular plate (20) respectively, and the spring (21) is made of manganese steel.

6. The trouser leg cuff closing device according to claim 1, characterized in that: The support rod (5), the circular plate (20) and the ball head (10) are coaxially arranged, and the support rod (5) is an elastic metal rod.

7. The trouser leg cuff closing device according to claim 1, characterized in that: The rotating frame (3), the mounting frame (2) and the driven gear ring (9) are coaxially arranged, and the driven gear ring (9) is located outside the support rod (5).

8. The trouser leg cuff closing device according to claim 1, characterized in that: A hand wheel (19) is fixedly mounted on one end of the screw rod (17), and a friction pattern is formed on the surface of the hand wheel (19).

9. The trouser leg cuff closing device according to claim 1, characterized in that: The diameter of the support rod (5) is smaller than the needle stroke of the electric sewing machine (1).

10. The trouser leg cuff closing device according to claim 4, characterized in that: The guide rod (12) is arranged in parallel with the screw rod (17), and the guide rod (12) is a smooth metal round rod.

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