Magnetic type die changing presser foot device

Abstract

The utility model provides a kind of magnetic formula's change mode's sewing equipment presser foot device, including presser foot plate and presser foot rod;Presser foot plate top end is equipped with installation sliding platform, installation sliding platform is slidably equipped with mounting, and mounting is also equipped with magnetic block, presser foot rod bottom end is equipped with positioning slot corresponding mounting and magnetic block, positioning slot is sleeved on mounting and magnetic block, and is connected by locking bolt;Presser foot plate bottom end is in the shape of a Chinese character for multiple groups of assembly groove, and installation frame is movably arranged in assembly groove, and roller is rotatably arranged on installation frame;Presser foot rod top end is equipped with guide slot corresponding the movable rod of sewing machine, and the movable rod of sewing machine is arranged in guide slot, and is connected by quick connection component.Magnetic block and positioning slot are adsorbed to realize the quick butt joint of presser foot plate, and locking bolt is reinforced;Mounting slides, and limiting block is positioned with groove, and fixed column is locked with positioning hole;Guide rod cooperates with sleeve, top pressure piece and spring, shortens change mode and downtime, and improves efficiency and flexibility.

Description

Technical Field

[0001] This utility model belongs to the technical field of presser foot devices, and more specifically, it relates to a magnetic presser foot device for sewing equipment. Background Technology

[0002] Sewing equipment is a mechanical device that uses thread to connect various materials in industries such as clothing and home textiles. The presser foot is indispensable for sewing. Applying appropriate pressure prevents fabric shifting and wrinkling, ensures even feeding, and guarantees smooth, beautiful, and strong stitches. It is a key component for achieving precise and efficient sewing operations. Traditional sewing equipment uses a mechanical fixing method for the presser foot. Changing the presser foot requires specific tools and involves multiple steps such as tightening screws and disassembling parts, which is time-consuming and labor-intensive, reducing the flexibility of equipment use, delaying overall mold changeover time, and affecting production efficiency. Furthermore, the complicated disassembly and installation steps can easily lead to problems such as misaligned presser foot installation and improper pressure adjustment, affecting the quality of the finished product. Utility Model Content

[0003] To solve the above-mentioned technical problems, this utility model provides a magnetic mold-changing presser foot device for sewing equipment. This addresses the technical issues in the prior art where traditional sewing equipment presser feet are mechanically fixed, requiring multiple disassembly processes for replacement. This reduces equipment flexibility and production efficiency, and easily leads to installation and pressure problems, affecting the quality of finished products.

[0004] The purpose and function of the magnetic mold-changing presser foot device for sewing equipment of this utility model are achieved by the following specific technical means:

[0005] A magnetic presser foot device for sewing equipment includes a presser foot plate and a presser foot rod. The presser foot plate has a mounting slide at its top, and a mounting component is slidably mounted within the mounting slide. A magnetic block is also mounted on the mounting component. A positioning groove is formed at the bottom of the presser foot rod corresponding to the mounting component and the magnetic block. The positioning groove is fitted onto the mounting component and the magnetic block and connected by a locking bolt. The bottom of the presser foot plate has multiple sets of assembly grooves in a triangular shape. A mounting frame is movably mounted within each assembly groove, and rollers are rotatably mounted on the mounting frame. A guide groove is formed at the top of the presser foot rod corresponding to the moving rod of the sewing machine. The moving rod of the sewing machine passes through the guide groove and is connected by a quick-connect assembly.

[0006] The above technical solution further includes that the mounting component is provided with two sets of limiting blocks opposite to each other, and the mounting slide is provided with limiting grooves corresponding to the limiting blocks. When the two ends of the mounting component slide to be parallel to the two ends of the mounting slide, the limiting blocks pass through the limiting grooves.

[0007] The above technical solution further includes that the mounting component is also provided with a fixing post, and the fixing post and the presser foot rod are respectively provided with a positioning hole, and one end of the locking bolt is inserted into the positioning hole of the fixing post and the presser foot rod.

[0008] The above technical solution further includes that the two opposite inner sides of the assembly groove are provided with sliding grooves, and the mounting bracket is also provided with sliders on both sides corresponding to the sliding grooves. The mounting bracket is disposed in the sliding groove of the assembly groove by sliding up and down through the sliders.

[0009] The above technical solution further includes that a guide post is provided in the slide groove, and a first spring is sleeved on the outer surface of the guide post, with the two ends of the first spring contacting the slide groove and the slider respectively.

[0010] The above technical solution further includes that the quick connection assembly includes a sleeve and a guide rod, one end of the guide rod passes through the sleeve, a locking element is provided on one side of the presser foot rod, and the other end of the guide rod passes through the movable rod and is detachably connected to the locking element.

[0011] The above technical solution further includes that a pressing member is movably disposed on the guide rod between the locking member and the sleeve, and a second spring is disposed between the pressing member and the sleeve, and the pressing member contacts the movable rod through the second spring.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] 1. The presser foot plate and presser foot rod are quickly connected by a magnetic block and a positioning groove, reinforced by a locking bolt, simplifying the multiple disassembly steps of traditional mechanical fixing. During installation, the mounting component slides within the mounting slide, the limit block and limit groove cooperate to complete the initial positioning, and the fixing post and positioning hole are connected by a locking bolt to achieve a stable fixation, significantly shortening the presser foot replacement time. At the same time, the guide rod and sleeve in the quick connection assembly cooperate with the top pressure component and the second spring to quickly connect the presser foot rod to the sewing machine's moving rod, reducing equipment downtime and improving production efficiency and equipment flexibility.

[0014] 2. The mounting bracket slides within the groove at the bottom of the presser foot plate via a slider. The guide post, in conjunction with the first spring, allows the roller to adaptively adjust its height when contacting the fabric, ensuring close contact with fabrics of varying thicknesses and stable feeding. A magnetic block and locking bolt combine to prevent installation misalignment, and the limiting structure guarantees installation accuracy, reducing stitch skewing caused by improper installation. The second spring applies pressure to the movable rod via a top pressure component, ensuring stable presser foot pressure, reducing fabric wrinkling and other defects caused by pressure issues, and improving finished product quality. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the assembled structure of this utility model.

[0016] Figure 2 This is an exploded structural diagram of the presser foot plate and presser foot rod of this utility model.

[0017] Figure 3 This is an exploded structural diagram of the presser foot plate and mounting bracket of this utility model.

[0018] Figure 4 yes Figure 3 A magnified structural diagram of region a in the middle.

[0019] Figure 5 This is a cross-sectional view of the quick-connect component of this utility model.

[0020] Figure 6 This is a cross-sectional structural diagram of the presser foot rod of this utility model.

[0021] In the diagram, the correspondence between component names and drawing numbers is as follows:

[0022] 1. Presser foot plate; 2. Presser foot rod; 3. Mounting bracket; 101. Mounting slide; 102. Mounting component; 103. Magnetic block; 104. Positioning groove; 105. Roller; 106. Guide groove; 201. Limiting block; 301. Fixing post; 302. Positioning hole; 401. Slide groove; 402. Sliding block; 501. Guide post; 502. First spring; 601. Sleeve; 602. Guide rod; 603. Locking component; 701. Top pressing component; 702. Second spring. Detailed Implementation

[0023] The embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate the technical solution of this utility model, but should not be used to limit the scope of protection of this utility model. Example:

[0024] like Figures 1 to 6As shown, this utility model provides a magnetic mold-changing presser foot device for sewing equipment, including a presser foot plate 1 and a presser foot rod 2. The top of the presser foot plate 1 is provided with a mounting slide 101, and a mounting component 102 is slidably disposed in the mounting slide 101. A magnetic block 103 is also provided on the mounting component 102. The bottom end of the presser foot rod 2 is provided with a positioning groove 104 corresponding to the mounting component 102 and the magnetic block 103. The positioning groove 104 is sleeved on the mounting component 102 and the magnetic block 103 and connected by a locking bolt. The bottom end of the presser foot plate 1 is provided with multiple sets of assembly grooves in a triangular shape. A mounting frame 3 is movably disposed in the assembly grooves. A roller 105 is rotatably disposed on the mounting frame 3. The top of the presser foot rod 2 is provided with a guide groove 106 corresponding to the moving rod of the sewing machine. The moving rod of the sewing machine passes through the guide groove 106 and is connected by a quick-connect assembly. The mounting slide 101 at the top of the presser foot plate 1 and the internal sliding mounting component 102, in conjunction with the magnet 103 on the mounting component 102 and the positioning groove 104 at the bottom of the presser foot rod 2 (the presser foot rod 2 is made of medium carbon steel), allow for quick installation of the presser foot plate 1 and presser foot rod 2 when changing the presser foot. Simply align the mounting component 102 along with the magnet 103 with the positioning groove 104, use the magnetic force of the magnet 103 for initial fixation, and then connect with the locking bolt. This avoids multiple tedious disassembly steps, thus improving production efficiency. Simultaneously, the sliding fit between the mounting slide 101 and the mounting component 102 facilitates position adjustment, making the installation process more precise.

[0025] The presser foot 1 features multiple sets of mounting slots arranged in a triangular pattern at its bottom. Mounting brackets 3 are movably mounted within these slots, and rollers 105 rotate on the mounting brackets 3. This design offers several advantages. The triangular arrangement allows the rollers 105 to apply force from multiple angles when in contact with the fabric, ensuring even pressure distribution during sewing and preventing fabric shifting due to uneven pressure. The mounting brackets 3 are movable within the mounting slots, automatically adjusting their height to accommodate fabrics of varying thicknesses, ensuring the rollers 105 remain in close contact with the fabric. This, combined with the pressure from the presser foot, guarantees stable fabric feeding. During sewing, stable feeding effectively reduces sewing defects such as skewing stitches and skipped stitches, improving the quality of the finished product.

[0026] The top of the presser foot lever 2 corresponds to the guide groove 106 on the sewing machine's movable lever, and the connection via a quick-connect assembly makes the connection between the presser foot lever 2 and the sewing machine's movable lever simple and efficient. During installation, the movable lever of the sewing machine is inserted into the guide groove 106 and then secured with the quick-connect assembly, allowing for rapid installation, reducing connection steps, and saving time. The quick-connect assembly also ensures connection stability, preventing loosening between the presser foot lever 2 and the movable lever during sewing machine operation, ensuring the presser foot functions stably and providing a guarantee for smooth sewing work.

[0027] like Figures 1 to 2As shown, the mounting component 102 is also provided with two sets of limiting blocks 201. The mounting slide 101 also has corresponding limiting grooves for the limiting blocks 201. When both ends of the mounting component 102 slide parallel to both ends of the mounting slide 101, the limiting blocks 201 pass through the limiting grooves. The two sets of limiting blocks 201 on the mounting component 102 cooperate with the limiting grooves in the mounting slide 101. When the mounting component 102 slides parallel to both ends of the mounting slide 101, the limiting blocks 201 enter the limiting grooves, limiting the sliding range of the mounting component 102 within the mounting slide 101. This prevents the mounting component 102 from detaching from the mounting slide 101 due to excessive sliding, ensuring that the mounting component 102 moves within a preset range, providing a stable foundation for subsequent docking with the presser foot 2.

[0028] Meanwhile, the cooperation between the limiting block 201 and the limiting groove can also form a precise positioning when the mounting part 102 slides into place, ensuring that the mounting part 102 and the positioning groove 104 at the bottom of the presser foot rod 2 are accurately aligned, so that the magnetic block 103 is accurately attracted to the corresponding position in the positioning groove 104, reducing installation deviation, facilitating the smooth insertion and fixing of the locking bolt, improving installation efficiency, and ensuring the structural stability after installation.

[0029] The mounting component 102 is also equipped with a fixing post 301. The fixing post 301 and the presser foot 2 have corresponding through-holes 302. One end of the locking bolt passes through the 302 in both the fixing post 301 and the presser foot 2. The fixing post 301 on the mounting component 102 corresponds to the 302 in the presser foot 2, and the locking bolt passes through them, rigidly connecting the mounting component 102 and the presser foot 2. This connection method transmits the pressure from the presser foot 2 to the mounting component 102, and then to the presser foot plate 1, ensuring stable pressure transmission, preventing the presser foot plate 1 from loosening during sewing, ensuring continuous and effective pressure from the presser foot on the fabric, and maintaining stability during the sewing process. The corresponding setting of the fixing post 301 and the 302 also provides a precise path for the locking bolt, reducing the alignment time during installation. After the locking bolt is inserted, it restricts the relative movement of the mounting part 102 and the presser foot 2. Combined with the attraction force of the magnetic block 103, it forms a double fixation, improves the reliability of the connection, reduces sewing deviation caused by unstable connection, and facilitates quick completion of the installation operation.

[0030] like Figures 3 to 4As shown, the inner surfaces of the assembly slot are provided with opposing grooves 401. Slider blocks 402 are also provided on both sides of the mounting frame 3 corresponding to the grooves 401. The mounting frame 3 is slidably positioned within the grooves 401 of the assembly slot via the sliders 402. The grooves 401 in the assembly slot cooperate with the sliders 402 on both sides of the mounting frame 3, allowing the mounting frame 3 to slide up and down within the assembly slot. This sliding structure provides a stable movement path for the mounting frame 3, restricts its direction of movement, prevents it from deviating from the preset trajectory during movement, ensures smooth movement of the mounting frame 3, provides a foundation for stable contact between the roller 105 and the fabric, and ensures uniform force on the fabric during sewing. The mounting frame 3, by sliding up and down within the grooves 401 via the sliders 402, can automatically adjust its height according to the fabric thickness. When the fabric is thicker, the mounting frame 3 slides upwards; when the fabric is thinner, the mounting frame 3 slides downwards, ensuring that the roller 105 always remains in contact with the fabric. This adaptive adjustment capability expands the device's applicability to fabrics of different thicknesses, reduces sewing problems caused by differences in fabric thickness, and improves the device's versatility.

[0031] A guide post 501 is also provided inside the slide groove 401. A first spring 502 is sleeved on the outer surface of the guide post 501. The two ends of the first spring 502 contact the slide groove 401 and the slider 402, respectively. The guide post 501 inside the slide groove 401 provides guidance for the slider 402 to slide up and down, restricting the slider 402 from deviating or wobbling during the sliding process, ensuring that the mounting frame 3 moves along a fixed trajectory, and avoiding inaccurate contact between the roller 105 and the fabric due to the deviation of the mounting frame 3, thus ensuring stable force on the fabric during sewing. At the same time, the first spring 502 outside the guide post 501, with its two ends contacting the slide groove 401 and the slider 402, can provide continuous elastic force to the slider 402 through its own elastic deformation. When the fabric thickness changes, the elastic force pushes the slider 402 to move the mounting frame 3, so that the roller 105 always fits tightly against the fabric, ensuring that fabrics of different thicknesses can be stably pressed during sewing, reducing the problem of unstable fabric feeding caused by loose fit.

[0032] like Figure 1 , Figure 2 and Figure 5As shown, the quick-connect assembly includes a sleeve 601 and a guide rod 602. One end of the guide rod 602 passes through the sleeve 601, and a locking element 603 is provided on one side of the presser foot rod 2. The other end of the guide rod 602 passes through the movable rod and is detachably connected to the locking element 603. A pressing element 701 is also movably mounted on the guide rod 602 between the locking element 603 and the sleeve 601. A second spring 702 is also provided between the pressing element 701 and the sleeve 601, and the pressing element 701 contacts the movable rod through the second spring 702. The sleeve 601 and the guide rod 602 cooperate, with the guide rod 602 passing through the sleeve 601 to guide the connection between the presser foot rod 2 and the movable rod. During installation, the guide rod 602 slides along the inner wall of the sleeve 601, quickly aligning with the movable rod, allowing the locking element 603 to smoothly connect with the other end of the guide rod 602, simplifying the installation steps, improving the connection efficiency between the presser foot rod 2 and the movable rod, and making mold changing and installation of the equipment more convenient.

[0033] After passing through the movable rod, the guide rod 602 is detached and connected to the locking member 603, forming a mechanical locking structure. This structure restricts the relative displacement between the presser foot rod 2 and the movable rod, maintaining a stable connection even when the sewing machine vibrates during operation. This prevents the presser foot rod 2 from falling off, ensuring the presser foot continues to act stably on the fabric and avoiding any impact on sewing quality due to loose connection. The top pressure member 701 is movably mounted on the guide rod 602, and the second spring 702 is located between the top pressure member 701 and the sleeve 601. The top pressure member 701 contacts the movable rod via the second spring 702. When the sewing machine is running and the movable rod drives the presser foot rod 2, the second spring 702 can buffer vibration and impact, reducing wear caused by rigid contact between the movable rod and the presser foot rod 2, and extending the life of the components. At the same time, the spring force keeps the top pressure member 701 continuously pressing against the movable rod, helping to maintain connection stability, making the presser foot work more smoothly, and improving the overall reliability of the equipment.

[0034] In use, first insert one end of the guide rod 602 into the sleeve 601, and let the other end of the guide rod 602 pass through the sewing machine's movable rod; then, detach and connect the end of the guide rod 602 that passes through the movable rod to the locking part 603 on one side of the presser foot rod 2 to complete the initial assembly; at this time, because the top pressing part 701 is in contact with the movable rod through the second spring 702, during the connection process, the top pressing part 701 can adapt to the force and position adjustment during installation with the help of the elasticity of the second spring 702, ensuring the stability after connection.

[0035] The above description is merely an embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A magnetically operated presser foot device for sewing equipment, comprising a presser foot plate (1) and a presser foot rod (2), characterized in that: The top of the presser foot plate (1) is provided with a mounting slide (101), and a mounting component (102) is slidably disposed in the mounting slide (101). A magnetic block (103) is also provided on the mounting component (102). The bottom end of the presser foot rod (2) is provided with a positioning groove (104) corresponding to the mounting component (102) and the magnetic block (103). The positioning groove (104) is sleeved on the mounting component (102) and the magnetic block (103) and connected by a locking bolt. The bottom end of the presser foot plate (1) is provided with multiple sets of assembly slots in a triangular shape. The mounting frame (3) is movably arranged in the assembly slots, and the mounting frame (3) is also rotatably provided with rollers (105). The top of the presser foot bar (2) is provided with a guide groove (106) corresponding to the movable rod of the sewing machine. The movable rod of the sewing machine passes through the guide groove (106) and is connected by a quick-connect assembly.

2. The presser foot device for a magnetic mold-changing sewing machine according to claim 1, characterized in that: The mounting component (102) is also provided with two sets of limiting blocks (201) opposite to each other. The mounting slide (101) is also provided with limiting grooves corresponding to the limiting blocks (201). When the two ends of the mounting component (102) slide to be parallel to the two ends of the mounting slide (101), the limiting blocks (201) pass through the limiting grooves.

3. The presser foot device for a magnetic mold-changing sewing machine according to claim 1, characterized in that: The mounting component (102) is also provided with a fixing post (301), and the fixing post (301) and the presser foot rod (2) are respectively provided with a positioning hole (302). One end of the locking bolt is inserted into the positioning hole (302) of the fixing post (301) and the presser foot rod (2).

4. The presser foot device for a magnetic mold-changing sewing machine according to claim 1, characterized in that: The two opposing inner surfaces of the assembly slot are provided with sliding grooves (401), and the mounting bracket (3) is also provided with sliders (402) on both sides corresponding to the sliding grooves (401). The mounting bracket (3) is disposed in the sliding grooves (401) of the assembly slot by sliding up and down through the sliders (402).

5. The presser foot device for a magnetic mold-changing sewing machine according to claim 4, characterized in that: The slide groove (401) is also provided with a guide post (501), and a first spring (502) is also sleeved on the outer surface of the guide post (501). The two ends of the first spring (502) are in contact with the slide groove (401) and the slider (402) respectively.

6. The presser foot device for a magnetic mold-changing sewing machine according to claim 1, characterized in that: The quick-connect assembly includes a sleeve (601) and a guide rod (602). One end of the guide rod (602) passes through the sleeve (601), and a locking element (603) is provided on one side of the presser foot rod (2). The other end of the guide rod (602) passes through the movable rod and is detachably connected to the locking element (603).

7. The presser foot device for a magnetic mold-changing sewing machine according to claim 6, characterized in that: A pressing member (701) is movably disposed on the guide rod (602) between the locking member (603) and the sleeve (601). A second spring (702) is also disposed between the pressing member (701) and the sleeve (601). The pressing member (701) contacts the movable rod through the second spring (702).

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