Efficient pleat and cut-out bag integrated template

Abstract

The utility model relates to clothing pocket making technical field, concretely relates to a kind of efficient pleat and dig bag integrated template, including bottom plate, the vertical fixedly connected with support plate in bottom plate upper side, the side fixedly connected with positioning strip of bottom plate close to support plate, the top of bottom plate is provided with pleat pressing plate, the top of pleat pressing plate is provided with sewing pressing plate. By adjusting mechanism control pleat pressing plate and sewing pressing plate always keep horizontal state with bottom plate when moving down, make each sewing groove and cloth surface overall adhesion, avoid the stitch deviation caused by adhesion gap, ensure that pleat edge sewing stitch is neat, substantially shorten the tooling adjustment time when material, when the cloth thickness changes, pleat pressing plate can be contacted with cloth with inclination, cause thin material when sewing groove and cloth adhesion is not close, appear stitch deviation;While thick material, the excessive compression of sewing groove to cloth can cause fabric deformation or pleat distortion technical problem.

Description

Technical Field

[0001] This utility model relates to the field of clothing pocket manufacturing technology, specifically to a highly efficient integrated template for pleats and pockets. Background Technology

[0002] An integrated template for pleats and cutouts allows designers to precisely shape the pleats and cutouts when creating pockets, giving them a three-dimensional look while ensuring they meet the overall aesthetic and functional requirements of the garment design. This integrated design reduces the separation of different processing steps, enabling precise production in a shorter time. Pleats typically add rich visual effects to the pockets, adding layers and dynamism to the garment. The cutout design helps to make the pocket shape more three-dimensional and unique. Chinese Patent Publication No. CN211185995U discloses a pleated bag template. A lower base plate is screwed to the lower side of an upper pressure plate. The lower base plate has a cavity inside. A first screw is provided on the front side of the cavity. Connecting blocks are fixed on the screw nuts at both ends of the first screw. The connecting blocks are connected to a first slider. A protrusion is provided on the upper surface of the first slider. The protrusion is inserted into the center of the lower end of the pleated pressure plate and is screwed on by a rotating shaft. The upper end of the pleated pressure plate passes through the opening in the center of the upper pressure plate and is exposed on the upper side of the upper pressure plate. Second grooves are provided on the left and right sides of the first groove. The pleated pressure plate can be moved according to the required distance. After moving to the required position, the two sides of the bag fabric are pressed down by the pleated pressure plate. Then, through the opening, the left and right ends of the bag fabric are sewn onto the fabric. Therefore, it is not necessary to measure each bag fabric before pleating, which reduces the labor intensity of workers. This utility model has the advantages of reasonable design and low manufacturing cost. The aforementioned patent mentions that the pleat pressing plate of the pleated bag forming template is screwed to the pivot of the first slider, allowing only unidirectional rotational pressing around the pivot to complete the pleating process. When the fabric thickness changes, one side of the pleat pressing plate contacts the fabric first during the pressing process, resulting in an inclined contact between the pleat pressing plate and the fabric. This causes the pleat pressing plate and the base plate to be in a non-horizontal state. When the fabric is thin, the sewing groove does not fit tightly enough, easily causing stitch deviation. When the fabric is thick, the sewing groove exerts excessive pressure on the fabric, easily leading to fabric deformation or distorted pleat shape. Therefore, we propose an efficient integrated pleating and bag-making template. Utility Model Content

[0003] To address the aforementioned issues, a highly efficient integrated template for pleats and pockets is provided. An adjustment mechanism ensures that the pleat presser plate and sewing presser plate remain horizontally aligned with the base plate during downward movement, guaranteeing full contact between each sewing groove and the fabric surface. This prevents stitch misalignment caused by gaps in the fit, ensuring neat stitches at the pleat edges. It significantly reduces tooling adjustment time during material changes and solves the technical problems that arise when fabric thickness varies: the pleat presser plate may tilt against the fabric, leading to loose contact and stitch misalignment in thin fabrics; while in thick fabrics, excessive pressure from the sewing grooves may cause fabric deformation or pleat distortion.

[0004] To address the problems of existing technologies, this utility model provides a highly efficient integrated template for pleats and pockets, comprising a base plate, a support plate vertically fixedly connected to the upper side of the base plate, a positioning strip fixedly connected to the side of the base plate near the support plate, a pleat pressing plate above the base plate, a sewing pressing plate above the pleat pressing plate, a pleat sewing groove A on the pleat pressing plate, a pleat sewing groove B and a straight pocket sewing groove sequentially on the sewing pressing plate, an adjustment mechanism between the base plate and the support plate for controlling the pleat pressing plate and the sewing pressing plate to always maintain a horizontal state with the base plate, and a pressure applying mechanism between the base plate and the sewing pressing plate for assisting the sewing pressing plate in maintaining a squeezed state on the pleat pressing plate.

[0005] Preferably, the adjusting mechanism includes a first guide component, a first limiting component, and two sets of positioning components; the first guide component is disposed on the support plate and is used to assist the pleat presser plate and the sewing presser plate in linear movement; the first limiting component is disposed on the support plate and the sewing presser plate and is used to assist the support plate and the sewing presser plate in being bound together; the two sets of positioning components are respectively disposed between the pleat presser plate and the guide component and between the sewing presser plate and the guide component, and are used to assist the pleat presser plate and the sewing presser plate in maintaining a perpendicular state to the support plate.

[0006] Preferably, the first guide assembly includes two sliders and a groove; the two sliders are rotatably connected to the pleating plate and the sewing plate, respectively; the groove is opened on the side of the support plate near the slider, and the groove slides with the slider.

[0007] Preferably, the first limiting component includes a first magnetic block A and a first magnetic block B; the first magnetic block A is fixedly connected to the sewing pressure plate; and the first magnetic block B is fixedly connected to the upper side of the support plate.

[0008] Preferably, the two positioning components each include an abutment plate and a groove; the two abutment plates are fixedly connected to the slider of the pleat pressing plate and the slider of the sewing pressing plate, respectively; the two grooves are respectively opened on the side of the pleat pressing plate near the abutment plate and the side of the sewing pressing plate near the abutment plate, and the grooves fit against the abutment plates.

[0009] Preferably, the pressure applying mechanism includes a second limiting component and a second guiding component; the second limiting component is disposed between the pleat pressing plate and the sewing pressing plate, and the second limiting component is used to help restrict the pleat pressing plate and the sewing pressing plate together; the second guiding component is disposed on the sewing pressing plate, and the second guiding component is used to provide guidance for the linear movement of the second limiting component.

[0010] Preferably, the second limiting component includes a second magnetic block A and a second magnetic block B; the second magnetic block A is disposed on the side of the sewing press plate near the pleat press plate; the second magnetic block B is fixedly connected to the upper side of the base plate.

[0011] Preferably, the second guide assembly includes a through groove, a support rod, and an elastic reset member; the through groove is formed on the sewing pressure plate; the support rod is slidably engaged with the through groove and is fixedly connected to the second magnetic block A; the elastic reset member is sleeved on the end of the support rod away from the second magnetic block A, and the two ends of the elastic reset member are fixedly connected to the sewing pressure plate and the support rod, respectively.

[0012] The advantages of this utility model compared to the prior art are: 1. By adjusting the mechanism, the pleat presser plate and sewing presser plate are kept horizontal with the base plate during downward movement, ensuring that each sewing groove is fully in contact with the fabric surface. This avoids stitch deviation caused by gaps in the fit, ensures neat stitches at the edges of the pleats, significantly reduces tooling adjustment time during material changes, and solves the technical problems that when the fabric thickness changes, the pleat presser plate may make tilted contact with the fabric, resulting in poor fit between the sewing groove and the fabric and stitch deviation when the fabric is thin; while when the fabric is thick, excessive pressure from the sewing groove may cause fabric deformation or pleat distortion.

[0013] 2. By controlling the sewing presser plate and pleat presser plate to maintain a compressed state through the pressure application mechanism, the operator does not need to continuously press the sewing presser plate during the sewing process. This avoids the limitation of operation caused by pressing the presser plate with one hand, reduces the physical exertion of the operator, improves the overall production efficiency, and solves the technical problem that the operator needs to continuously manually press the presser plate to maintain the fit in the sewing industry, which easily leads to a single and limited operation and a decrease in operation stability. Attached Figure Description

[0014] Figure 1 This is a three-dimensional schematic diagram of the base plate and sewing pressure plate of a high-efficiency pleated and pocket-cutting integrated template and their connection structure.

[0015] Figure 2 This is a three-dimensional schematic diagram of the second magnetic block and support rod and their connection structure of a highly efficient pleated and bag-cut integrated template.

[0016] Figure 3 This is a three-dimensional schematic diagram of the support rods and elastic reset components and their connection structure of a high-efficiency pleated and bag-cut integrated template.

[0017] Figure 4 This is a three-dimensional schematic diagram of the pleating pressure plate and sewing pressure plate and their connection structure of a high-efficiency pleated and pocket-cutting integrated template.

[0018] Figure 5 It is a highly efficient integrated template for pleats and pockets. Figure 2 Enlarged diagram of point A in the middle.

[0019] Figure 6 It is a highly efficient integrated template for pleats and pockets. Figure 3 Enlarged diagram of point B in the middle.

[0020] The following are the labels in the diagram: 1. Base plate; 11. Support plate; 12. Positioning strip; 13. Pleat pressure plate; 14. Sewing pressure plate; 15. Pleat sewing groove A; 16. Pleat sewing groove B; 17. Straight pocket sewing groove; 2. Sliding block; 21. Slide groove; 22. First magnetic block A; 23. First magnetic block B; 24. Abutment plate; 25. Groove; 26. Second magnetic block A; 27. Second magnetic block B; 28. Through groove; 29. ​​Support rod; 210. Elastic reset component. Detailed Implementation

[0021] To further understand the features, technical means, and specific objectives and functions achieved by this utility model, the following detailed description of this utility model is provided in conjunction with the accompanying drawings and specific embodiments.

[0022] See Figures 1-4 As shown, a high-efficiency integrated template for pleats and pockets includes a base plate 1, a support plate 11 vertically fixedly connected to the upper side of the base plate 1, a positioning strip 12 fixedly connected to the side of the base plate 1 near the support plate 11, a pleat pressing plate 13 arranged above the base plate 1, a sewing pressing plate 14 arranged above the pleat pressing plate 13, a pleat sewing groove A15 opened on the pleat pressing plate 13; a pleat sewing groove B16 and a straight pocket sewing groove 17 are sequentially opened on the sewing pressing plate 14; an adjustment mechanism is provided between the base plate 1 and the support plate 11 to control the pleat pressing plate 13 and the sewing pressing plate 14 to always maintain a horizontal state with the base plate 1; and an auxiliary sewing mechanism is provided between the base plate 1 and the sewing pressing plate 14. The pressure plate 14 is a pressure-applying mechanism that keeps the pleated pressure plate 13 under pressure. The adjustment mechanism includes a first guide assembly, a first limiting assembly, and two sets of positioning assemblies. The first guide assembly is disposed on the support plate 11 and is used to assist the pleated pressure plate 13 and the sewing pressure plate 14 in linear movement. The first limiting assembly is disposed on the support plate 11 and the sewing pressure plate 14 and is used to help the support plate 11 and the sewing pressure plate 14 be confined together. The two sets of positioning assemblies are respectively disposed between the pleated pressure plate 13 and the guide assembly and between the sewing pressure plate 14 and the guide assembly. The positioning assemblies are used to help the pleated pressure plate 13 and the sewing pressure plate 14 maintain a perpendicular state to the support plate 11.

[0023] Specifically, when the integrated pleated and pocket-shaped template is put into use, the base plate 1 is first fixedly installed with the sewing equipment, and then two pieces of fabric are placed on the upper side of the base plate 1. At this time, the workers can use the positioning strip 12 to limit the placement of the fabric, ensuring that the two pieces of fabric remain symmetrical, and providing a reference positioning for subsequent processing.

[0024] Next, the pleating presser plate 13 is lowered by the adjustment mechanism. During the downward movement, the pleating presser plate 13 remains horizontal with the base plate 1, ensuring that it flattens and adheres to the fabric surface. Workers can fold the fabric according to the preset pleating sewing process requirements, folding part of the fabric onto the upper side of the pleating presser plate 13. The horizontally aligned pleating presser plate 13 provides uniform support and positioning reference for the fabric, preventing localized wrinkling or uneven stress caused by the presser plate tilting. This ensures stable pleats after folding, and eliminates the need for repeated fabric adjustments, significantly reducing the pleating time for a single piece of fabric and improving batch processing efficiency.

[0025] After the pleat pressing plate 13 is positioned, the sewing pressing plate 14 is lowered by the adjustment mechanism. During the downward movement, the sewing pressing plate 14 remains horizontal with the base plate 1, ensuring that the sewing pressing plate 14 flatly adheres to the fabric on the upper side of the pleat pressing plate 13. This avoids stitch deviation caused by loosening of pleats during subsequent sewing, reduces differences in pleat shape between different operators or batches, and improves product quality stability. At the same time, both the pleat pressing plate 13 and the sewing pressing plate 14 are perpendicular to and in uniform contact with the fabric surface, preventing the pocket outline from shifting due to plate tilting, preventing thin fabric from slipping due to uneven pressure, and preventing wrinkles or deformation caused by localized stress concentration. This ensures that the fabric in the pocket processing area remains flat and adheres to the base plate 1, providing a stable reference surface for subsequent pocket cutting and edge sewing, reducing processing defects caused by fabric deviation, and lowering the rework rate.

[0026] When workers control the sewing equipment to process the fabric, the pressure mechanism can maintain a stable compression state between the sewing pressure plate 14 and the pleat pressure plate 13, eliminating the need for workers to continuously press the sewing pressure plate 14 during the sewing process. This allows workers to focus their hands on core processes such as guiding the fabric needle path and monitoring the sewing progress, avoiding the operational limitations caused by pressing the pressure plate with one hand, reducing the time spent sewing a single pleat; at the same time, it effectively reduces the physical exertion of workers, alleviates labor intensity, reduces operational errors caused by fatigue, and further improves overall production efficiency.

[0027] After the pleating process is completed, rotate and open the sewing pressure plate 14, and use the first limiting component to limit and fix the sewing pressure plate 14 and the support plate 11; then place the bag fabric in the pocket sewing area of ​​the fabric, and rotate and lower the sewing pressure plate 14 again to press and position the bag fabric until the integrated processing of pleating and pocket is completed.

[0028] See Figures 1-6 As shown, the first guide assembly includes two sliders 2 and a groove 21; the two sliders 2 are rotatably connected to the pleating plate 13 and the sewing plate 14 respectively; the groove 21 is opened on the side of the support plate 11 near the sliders 2, and the groove 21 slides with the sliders 2; the first limiting assembly includes a first magnetic block A22 and a first magnetic block B23; the first magnetic block A22 is fixedly connected to the sewing plate 14; the first magnetic block B23 is fixedly connected to the upper side of the support plate 11; the two positioning assemblies each include an abutment plate 24 and a groove 25; the two abutment plates 24 are fixedly connected to the sliders 2 of the pleating plate 13 and the sewing plate 14 respectively; the two grooves 25 are opened on the side of the pleating plate 13 near the abutment plate 24 and the side of the sewing plate 14 near the abutment plate 24 respectively, and the grooves 25 fit against the abutment plates 24.

[0029] Specifically, slider 2 and groove 21 form a sliding guide pair. First magnetic block A22 and first magnetic block B23 are magnetically attracted to each other.

[0030] When the fabric needs to be placed on the base plate 1, rotate the sewing presser plate 14 so that it is vertical above the base plate 1. Move the sewing presser plate 14 upward, causing the slider 2 to move upward along the slide groove 21. The slider 2 and the slide groove 21 form a sliding guide pair, ensuring that the slider 2 moves in a straight line along the slide groove 21. At this time, the sewing presser plate 14 simultaneously drives the first magnetic block A22 to gradually approach the first magnetic block B23. When the slider 2 of the sewing presser plate 14 moves to the top of the slide groove 21, the first magnetic block A22 and the first magnetic block B23 are in contact. Through the magnetic attraction between the first magnetic block A22 and the first magnetic block B23, the sewing presser plate 14 is fixed and limited to the support plate 11. At the same time, the sewing presser plate 14 is in a state away from the pleat presser plate 13.

[0031] Then, rotate the pleated pressure plate 13 away from the base plate 1 and place the fabric on the base plate 1; rotate the pleated pressure plate 13 in the opposite direction so that the groove 25 of the pleated pressure plate 13 fits against the abutment plate 24, and move the pleated pressure plate 13 down. At this time, the pleated pressure plate 13 drives the slider 2 to move down along the slide groove 21. The abutment plate 24 provides support for the pleated pressure plate 13, ensuring that the pleated pressure plate 13 remains horizontal with the base plate 1 during the downward movement, thus flattening and fitting the fabric surface.

[0032] After the fabric is folded, the rotating sewing press plate 14 causes the first magnetic block A22 to disengage from the first magnetic block B23, and at the same time, the groove 25 of the first magnetic block A22 fits against the abutment plate 24, and the sewing press plate 14 moves down. Similarly, the sewing press plate 14 can move down while maintaining a horizontal position with the base plate 1, achieving a smooth fit with the fabric on the upper side of the pleat press plate 13.

[0033] When the staff controls the sewing equipment to process the fabric, the pleating plate 13 can form a uniform and tight fit with the fabric for different thicknesses. For thin materials, it can effectively prevent the stitches from shifting; for thick materials, it can prevent the fabric from deforming or the pleat shape from becoming distorted.

[0034] See Figures 1-3 As shown, the pressure applying mechanism includes a second limiting component and a second guiding component; the second limiting component is disposed between the pleat pressing plate 13 and the sewing pressing plate 14, and is used to assist in confining the pleat pressing plate 13 and the sewing pressing plate 14 together; the second guiding component is disposed on the sewing pressing plate 14, and is used to guide the linear movement of the second limiting component; the second limiting component includes a second magnet A26 and a second magnet B27; the second magnet A26 is disposed on the sewing pressing plate 14 near... Near the pleated pressure plate 13 on one side; the second magnetic block B27 is fixedly connected to the upper side of the base plate 1; the second guide assembly includes a through groove 28, a support rod 29 and an elastic reset member 210; the through groove 28 is opened on the sewing pressure plate 14; the support rod 29 is slidably engaged with the through groove 28, and the support rod 29 is fixedly connected to the second magnetic block A26; the elastic reset member 210 is sleeved on the end of the support rod 29 away from the second magnetic block A26, and the two ends of the elastic reset member 210 are fixedly connected to the sewing pressure plate 14 and the support rod 29 respectively.

[0035] Specifically, the second magnetic block A26 and the second magnetic block B27 are magnetically attracted to each other. The through slot 28 and the support rod 29 form a sliding guide pair. The elastic reset member 210 is preferably a spring.

[0036] After the sewing pressure plate 14 is flat and attached to the fabric on the upper side of the pleated pressure plate 13, the sewing pressure plate 14 can drive the support rod 29 to move towards the base plate 1 via the elastic reset member 210. At this time, pressing the support rod 29 causes it to slide along the through groove 28. The through groove 28 and the support rod 29 form a sliding guide pair, which can prevent the support rod 29 from shaking or shifting, and ensure that the support rod 29 stably drives the second magnetic block A26 and the second magnetic block B27 to fit together. Through the magnetic attraction between the second magnetic block A26 and the second magnetic block B27, the second magnetic block A26 and the second magnetic block B27 form a limiting fit; at the same time, the support rod 29 compresses the elastic reset member 210, causing the elastic reset member 210 to undergo compression deformation. The compressed elastic reset member 210 can push the sewing pressure plate 14 closer to the pleated pressure plate 13 and form compression.

[0037] This allows workers to focus their hands on core processes such as guiding the fabric needle path and monitoring the sewing progress without having to continuously press the sewing press plate 14 during the sewing process. At the same time, it can effectively reduce the physical exertion of workers, reduce labor intensity, reduce operational errors caused by fatigue, and further improve overall production efficiency.

[0038] Working principle: Place two pieces of fabric on the upper side of the base plate 1 respectively, move the pleating plate 13 down so that the pleating plate 13 can flatly adhere to the fabric surface and fold the fabric, causing part of the fabric to fold over to the upper side of the pleating plate 13. Then move the sewing plate 14 down so that the sewing plate 14 can flatly adhere to the fabric on the upper side of the pleating plate 13. This can avoid the stitch deviation caused by the loosening of the pleats during subsequent sewing, reduce the difference in pleat shape between different operators or different batches, and improve the stability of product quality. At the same time, the second magnetic block A26 and the second magnetic block B27 form a limiting cooperation, and the elastic reset member 210 can push the sewing plate 14 closer to the pleating plate 13 and form a squeeze, so that the operator does not need to continuously press the sewing plate 14 during the sewing process.

[0039] The above embodiments only illustrate one or more implementations of this utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of this utility model. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the appended claims.

Claims

1. A high-efficiency integrated template for pleats and pockets, comprising a base plate (1), a support plate (11) vertically fixedly connected to the upper side of the base plate (1), a positioning strip (12) fixedly connected to the side of the base plate (1) near the support plate (11), a pleat pressing plate (13) provided above the base plate (1), and a sewing pressing plate (14) provided above the pleat pressing plate (13), characterized in that, A pleat sewing groove A (15) is provided on the pleat presser plate (13); The sewing press plate (14) is provided with a pleated sewing groove B (16) and a straight bag sewing groove (17) in sequence. An adjustment mechanism is provided between the base plate (1) and the support plate (11) to control the pleat pressing plate (13) and the sewing pressing plate (14) to always maintain a horizontal state with the base plate (1); A pressure mechanism is provided between the base plate (1) and the sewing pressure plate (14) to assist the sewing pressure plate (14) in maintaining the pleat pressure plate (13) under pressure.

2. The efficient pleat and cut-out integrated template according to claim 1, wherein, The adjustment mechanism includes a first guide assembly, a first limit assembly, and two sets of positioning assemblies; The first guide assembly is disposed on the support plate (11). The first guide assembly is used to assist the pleat presser plate (13) and the sewing presser plate (14) in linear movement. The first limiting component is disposed on the support plate (11) and the sewing pressure plate (14). The first limiting component is used to help limit the support plate (11) and the sewing pressure plate (14) together. Two sets of positioning components are respectively set between the pleat presser plate (13) and the guide component and between the sewing presser plate (14) and the guide component. The positioning components are used to help the pleat presser plate (13) and the sewing presser plate (14) maintain a perpendicular state with the support plate (11).

3. The efficient pleat and cut-out integrated template according to claim 2, wherein, The first guide assembly includes two sliders (2) and a groove (21); Two sliders (2) are rotatably connected to the pleat presser plate (13) and the sewing presser plate (14), respectively; The slide (21) is opened on the side of the support plate (11) near the slider (2), and the slide (21) slides with the slider (2).

4. The high efficiency pleat and cutaway bag integrated form of claim 2, wherein, The first limiting component includes a first magnetic block A (22) and a first magnetic block B (23); The first magnetic block A (22) is fixedly connected to the sewing pressure plate (14); The first magnetic block B (23) is fixedly connected to the upper side of the support plate (11).

5. The efficient pleat and cut-out integrated template according to claim 2, wherein, The two positioning components include an abutment plate (24) and a groove (25), respectively. The two abutment plates (24) are fixedly connected to the slider (2) of the pleat press plate (13) and the slider (2) of the sewing press plate (14), respectively; Two grooves (25) are respectively opened on the side of the pleated pressing plate (13) near the abutting plate (24) and the side of the sewing pressing plate (14) near the abutting plate (24), and the grooves (25) fit into the abutting plate (24).

6. The efficient pleat and cut-out integrated template according to claim 5, wherein, The pressure-applying mechanism includes a second limiting component and a second guiding component; The second limiting component is disposed between the pleat presser plate (13) and the sewing presser plate (14), and the second limiting component is used to help limit the pleat presser plate (13) and the sewing presser plate (14) together; The second guide assembly is disposed on the sewing pressure plate (14) and is used to guide the linear movement of the second limit assembly.

7. The efficient pleat and cut-out integrated template according to claim 6, characterized in that The second limiting component includes a second magnetic block A (26) and a second magnetic block B (27). The second magnetic block A (26) is located on the side of the sewing press plate (14) near the pleat press plate (13); The second magnetic block B (27) is fixedly connected to the upper side of the base plate (1).

8. The high-efficiency pleat and cut-out integrated template according to claim 6, wherein, The second guide assembly includes a through groove (28), a support rod (29), and a resilient reset member (210); The through groove (28) is formed on the sewing press plate (14); The support rod (29) is slidably engaged with the through groove (28), and the support rod (29) is fixedly connected to the second magnetic block A (26); The elastic reset piece (210) is sleeved on the end of the support rod (29) away from the second magnetic block A (26), and the two ends of the elastic reset piece (210) are fixedly connected to the sewing pressure plate (14) and the support rod (29) respectively.

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