Fixed-width hemming presser foot for sewing machine

Abstract

The utility model relates to the technical field of sewing machines, and discloses a fixed-width hemming presser foot for a sewing machine, which comprises a device main body, a dismounting groove is arranged at the bottom of the device main body, a fixed column is arranged in the dismounting groove, limiting grooves are arranged on the left side and the right side of the fixed column, and guide strips are fixedly connected to the front side and the rear side of the fixed column. Guide grooves are formed in the front and the back of the inner wall of the dismounting groove, a placing groove is formed in the bottom of the fixing column, a buffer assembly is arranged in the placing groove, a connecting column is connected to the bottom of the buffer assembly, a pressing foot is connected to the bottom of the connecting column, and fixing shells are fixedly connected to the left side and the right side of the device body. And telescopic grooves are formed in the opposite sides of the two fixed shells. According to the utility model, the placing groove, the first spring, the buffer column, the mounting groove, the connecting column and the presser foot are matched to work, the buffer effect on the presser foot can be improved through the buffer assembly, and the presser foot can be prevented from being damaged when the presser foot moves downwards excessively.

Description

Technical Field

[0001] The utility model relates to the technical field of sewing machines, in particular to a fixed-width edge-sewing presser foot for sewing machines. Background Technique

[0002] A sewing machine is a machine that uses one or more sewing threads to form one or more stitches on the sewing material, so as to interweave or stitch together one or more layers of sewing materials. Sewing machines can sew fabrics such as cotton, linen, silk, wool, and artificial fibers, as well as products such as leather, plastic, and paper. The stitches sewn are neat, beautiful, flat and firm, the sewing speed is fast, and it is easy to use. When sewing the fabric, the rotary hook and the sewing needle of the sewing machine cooperate with each other to interweave and lock the bobbin thread and the face thread on the fabric, so as to form stitches. The sewing machine presser foot is an essential component in the feeding mechanism of the sewing machine. Various different forms of sewing machine presser feet play a very important role in the production process, such as the presser foot for sewing topstitch, the special sewing machine presser foot for invisible zippers, the pleating sewing machine presser foot, etc. It is very important to select different sewing machine presser feet for different sewing operations.

[0003] After retrieval, the existing Chinese patent publication number is: CN207244146U, which provides a sewing machine presser foot. This patent makes the presser foot applicable to sewing materials with different thicknesses and different angle changes by setting the presser foot bottom plate into different thicknesses and shapes, has good adaptability to fabrics with different thicknesses during the sewing process of the sewing material, ensures the neatness and smoothness of the stitches during the sewing process, ensures the beautiful effect of the sewing material, and at the same time improves the comfort of the human body wearing the sewing material, and has good usability and wide popularization value.

[0004] Although the above patent can have good adaptability to fabrics with different thicknesses during the sewing process of the sewing material, ensure the neatness and smoothness of the stitches during the sewing process, and ensure the beautiful effect of the sewing material, the above-mentioned sewing machine presser foot still has the following problems: it is not convenient to disassemble between the presser foot and the device main body, and different types of presser feet cannot be replaced according to needs, which reduces the convenience of the device main body and is not convenient to use.

[0005] In view of the above problems, for this reason, a fixed-width edge-sewing presser foot for sewing machines is proposed. Utility Model Content

[0006] The purpose of the utility model is to provide a fixed-width edge-sewing presser foot for sewing machines, which solves the problems that it is not convenient to disassemble between the presser foot and the device main body and different types of presser feet cannot be replaced in the background technique.

[0007] To achieve the above object, the utility model provides the following technical solutions: a fixed-width seam-edge presser foot for a sewing machine, including a device main body. A disassembly groove is provided at the bottom of the device main body. A fixing column is arranged in the disassembly groove. Limiting grooves are provided on both the left and right sides of the fixing column. Guide bars are fixedly connected to both the front and rear sides of the fixing column. Guide grooves are provided on both the front and rear sides of the inner wall of the disassembly groove. A placement groove is provided at the bottom of the fixing column. A buffer assembly is arranged in the placement groove. A connecting column is connected to the bottom of the buffer assembly. A presser foot is connected to the bottom of the connecting column. Fixed shells are fixedly connected to both the left and right sides of the device main body. Telescopic grooves are provided on the opposite sides of the two fixed shells. A pull rod penetrates through and is slidably connected in the telescopic groove. Limiting columns are fixedly connected to the opposite ends of the two pull rods. The limiting columns penetrate through the device main body. A toggling member is arranged outside the fixed shell. A through groove is provided through and opened in the toggling member. A rotating shaft penetrates through and is rotatably connected to the middle of the through groove.

[0008] By adopting the above technical solution, the fixing column can be pulled out of the disassembly groove to disassemble and replace the presser foot by pulling out the limiting columns from the limiting grooves on both sides of the fixing column and retracting them into the telescopic grooves through the device main body.

[0009] As a further description of the above technical solution: the buffer assembly includes a buffer column. The top of the buffer column is fixedly connected to the placement groove. An installation groove is provided at the bottom of the buffer column. A second spring is fixedly connected in the installation groove. A telescopic column is fixedly connected to the bottom of the second spring. A first spring is sleeved outside the buffer column. The bottom of the first spring is fixedly connected to the connecting column.

[0010] By adopting the above technical solution, the buffer assembly can improve the buffering effect on the presser foot and avoid damage to the presser foot caused by excessive downward movement of the presser foot.

[0011] As a further description of the above technical solution: the guide bar is arranged in the guide groove, and the outer part of the guide bar is slidably connected to the inner wall of the guide groove.

[0012] By adopting the above technical solution, the guide bar inserted into the guide groove plays a limiting role, making the installation of the fixing column in the disassembly groove more stable.

[0013] As a further description of the above technical solution: the outer part of the rotating shaft is rotatably connected to the outward end of the pull rod.

[0014] By adopting the above technical solution, the rotating shaft plays a connecting role.

[0015] As a further description of the above technical solution: a third spring is sleeved outside the pull rod, and the third spring is arranged in the telescopic groove.

[0016] By adopting the above technical solution, the third spring reset facilitates driving the limiting column to extend out of the telescopic groove.

[0017] As a further description of the above technical solution: scale lines are arranged outside the presser foot.

[0018] By adopting the above technical solution, the scale lines can conveniently achieve the effect of width determination during sewing.

[0019] As a further description of the above technical solution: the connecting column is arranged in the placing groove, and the outer part of the connecting column is slidably connected with the inner wall of the placing groove.

[0020] By adopting the above technical solution, it is convenient for the connecting column to expand and contract in the placing groove.

[0021] As a further description of the above technical solution: the telescopic column is arranged in the installation groove.

[0022] By adopting the above technical solution, it is convenient for the telescopic column to expand and contract in the installation groove.

[0023] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0024] 1. For the width-determining sewing presser foot for sewing machine provided by the present utility model, firstly, through the mutual cooperation of the fixed shell, telescopic groove, pull rod, limiting column, third spring, lever, through groove, limiting groove, guide strip and guide groove, by pulling out the limiting column from the limiting grooves on both sides of the fixed column and retracting it into the telescopic groove through the device main body, the fixed column can be pulled out from the disassembly groove to disassemble and replace the presser foot, and the guide strip is inserted into the guide groove to play a limiting effect, making the installation of the fixed column in the disassembly groove more stable.

[0025] 2. For the width-determining sewing presser foot for sewing machine provided by the present utility model, through the mutual cooperation of the placing groove, first spring, buffer column, installation groove, second spring, telescopic column, connecting column and presser foot, the buffer component can improve the buffering effect on the presser foot, and can also avoid the damage to the presser foot caused by excessive downward movement of the presser foot. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 is an exploded schematic view of the overall structure of the present utility model;

[0027] Figure 2 is a schematic view of the buffer component structure of the present utility model;

[0028] Figure 3 is a schematic view of the overall structure of the present utility model;

[0029] Figure 4 is a sectional view of the device main body of the present utility model.

[0030] In the figure: 1, device main body; 2, disassembly groove; 3, fixing column; 4, limiting groove; 5, guiding strip; 6, guiding groove; 7, placing groove; 8, first spring; 9, buffer column; 10, installation groove; 11, second spring; 12, telescopic column; 13, connecting column; 14, pressing foot; 15, fixing shell; 16, telescopic groove; 17, pull rod; 18, limiting column; 19, toggling member; 20, through groove; 21, rotating shaft; 22, third spring; 23, graduation line. Specific implementation manner

[0031] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0032] To further understand the content of the present invention, the present invention will be described in detail with reference to the accompanying drawings.

[0033] Referring to Figures 1-4 , the fixed-width sewing edge pressing foot for a sewing machine of the present invention includes a device main body 1. A disassembly groove 2 is opened at the bottom of the device main body 1 for convenient disassembly. A fixing column 3 is arranged in the disassembly groove 2. Limiting grooves 4 are opened on both the left and right sides of the fixing column 3 to play a limiting effect. Guiding strips 5 are fixedly connected to both the front and rear sides of the fixing column 3. Guiding grooves 6 are opened on both the front and rear sides of the inner wall of the disassembly groove 2 to cooperate with the guiding strips 5 to improve stability. A placing groove 7 is opened at the bottom of the fixing column 3. A buffer assembly is arranged in the placing groove 7. The bottom of the buffer assembly is connected to a connecting column 13 which plays a connecting role. The bottom of the connecting column 13 is connected to a pressing foot 14. Fixing shells 15 are fixedly connected to both the left and right sides of the device main body 1. Telescopic grooves 16 are opened on the opposite sides of the two fixing shells 15 to facilitate the telescopic movement of the limiting columns 18. A pull rod 17 penetrates through and is slidably connected in the telescopic groove 16 to facilitate driving the limiting column 18 to move. Limiting columns 18 are fixedly connected to the opposite ends of the two pull rods 17. The limiting columns 18 penetrate through the device main body 1. A toggling member 19 is arranged on the outside of the fixing shell 15. A through groove 20 penetrates through and is opened in the toggling member 19. A rotating shaft 21 penetrates through and is rotatably connected to the middle of the through groove 20 to play a connecting effect.

[0034] Referring to Figure 2, the buffer assembly includes a buffer column 9. The top of the buffer column 9 is fixedly connected to the placement groove 7. An installation groove 10 is opened at the bottom of the buffer column 9. A second spring 11 is fixedly connected inside the installation groove 10. The bottom of the second spring 11 is fixedly connected to a telescopic column 12. A first spring 8 is sleeved outside the buffer column 9. The bottom of the first spring 8 is fixedly connected to a connecting column 13. The telescopic column 12 is arranged inside the installation groove 10. The buffer assembly can improve the buffering effect on the presser foot 14 and can also avoid damage to the presser foot 14 when the presser foot 14 moves down excessively.

[0035] Refer to Figure 2 , Figure 3 and Figure 4 , the guide bar 5 is arranged inside the guide groove 6, and the outer part of the guide bar 5 is slidably connected to the inner wall of the guide groove 6. Inserting the guide bar 5 into the guide groove 6 has a limiting effect. The outer part of the rotating shaft 21 is rotatably connected to the outer end of the pull rod 17. The rotating shaft 21 has a connecting effect. A third spring 22 is sleeved outside the pull rod 17. The third spring 22 is arranged inside the telescopic groove 16. The third spring 22 can drive the limiting column 18 to extend out of the telescopic groove 16 conveniently when reset. Scale lines 23 are arranged outside the presser foot 14. The scale lines 23 can conveniently achieve a width-setting effect when sewing the edge. The connecting column 13 is arranged inside the placement groove 7, and the outer part of the connecting column 13 is slidably connected to the inner wall of the placement groove 7.

[0036] Working principle: During operation, when the presser foot 14 moves down excessively, the connecting column 13 at the top of the presser foot 14 squeezes the first spring 8 inside the placement groove 7 upward. The first spring 8 deforms under force and is continuously compressed, providing a buffering effect for the presser foot 14. When the connecting column 13 continues to move upward and squeezes the first spring 8 until it squeezes the telescopic column 12, the telescopic column 12 is pressed inside the installation groove 10 to squeeze the second spring 11, buffering again to prevent the presser foot 14 from moving down excessively and damaging the presser foot 14. When the presser foot 14 needs to be replaced, pull the actuating part 19 so that after the actuating part 19 rotates 90°, one end of the actuating part 19 is perpendicular to the fixed housing 15 for limiting. At this time, the actuating part 19 rotates along the rotating shaft 21, and then can pull the pull rod 17. The pull rod 17 drives the limiting column 18 to squeeze the third spring 22 and retract into the telescopic groove 16. At this time, the limiting column 18 is disengaged from the limiting grooves 4 on both sides of the fixed column 3, and the fixed column 3 can be pulled out of the guide groove 6 through the guide bar 5, realizing the disassembly of the presser foot 14 and facilitating replacement.

[0037] It should be noted that in this text, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprising", "including" or any other variant thereof are intended to cover non-exclusive inclusion, such that a process, method, article or device comprising a series of elements not only includes those elements but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device.

[0038] Although embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. The fixed-width edge-sewing presser foot for a sewing machine, comprising a device main body (1), characterized in that: A disassembly groove (2) is formed at the bottom of the device body (1). A fixing column (3) is arranged in the disassembly groove (2). Limiting grooves (4) are formed on both the left and right sides of the fixing column (3). Guide bars (5) are fixedly connected to the front and rear sides of the fixing column (3). Guide grooves (6) are formed on the front and rear sides of the inner wall of the disassembly groove (2). A placement groove (7) is formed at the bottom of the fixing column (3). A buffer assembly is arranged in the placement groove (7). The bottom of the buffer assembly is connected to a connecting column (13). The bottom of the connecting column (13) is connected to a pressing foot (14). Fixing shells (15) are fixedly connected to both the left and right sides of the device body (1). Telescopic grooves (16) are formed on the opposite sides of the two fixing shells (15). A pull rod (17) passes through and is slidably connected in the telescopic groove (16). Limiting columns (18) are fixedly connected to the opposite ends of the two pull rods (17). The limiting columns (18) pass through the device body (1). A toggling member (19) is arranged on the outer side of the fixing shell (15). A through groove (20) is formed through the toggling member (19). A rotating shaft (21) passes through and is rotatably connected to the middle of the through groove (20).

2. The fixed-width seam edge presser foot for sewing machine according to claim 1, wherein: The buffer assembly includes a buffer column (9). The top of the buffer column (9) is fixedly connected to the placement groove (7). An installation groove (10) is formed at the bottom of the buffer column (9). A second spring (11) is fixedly connected in the installation groove (10). The bottom of the second spring (11) is fixedly connected to a telescopic column (12). A first spring (8) is sleeved outside the buffer column (9). The bottom of the first spring (8) is fixedly connected to the connecting column (13).

3. The fixed-width edge-sewing presser foot for a sewing machine according to claim 1, characterized in that: The guide bar (5) is arranged in the guide groove (6), and the outer side of the guide bar (5) is slidably connected to the inner wall of the guide groove (6).

4. The fixed-width seam edge presser foot for sewing machine according to claim 1, characterized in that: The outer side of the rotating shaft (21) is rotatably connected to the outer end of the pull rod (17).

5. The fixed-width edge-sewing presser foot for sewing machine according to claim 1, characterized in that: A third spring (22) is sleeved outside the pull rod (17). The third spring (22) is arranged in the telescopic groove (16).

6. The fixed-width edge-sewing presser foot for sewing machines according to claim 1, characterized in that: Scale lines (23) are arranged on the outer side of the pressing foot (14).

7. The fixed-width edge-sewing presser foot for sewing machine according to claim 1, wherein: The connecting column (13) is arranged in the placement groove (7), and the outer side of the connecting column (13) is slidably connected to the inner wall of the placement groove (7).

8. The fixed-width edge-sewing presser foot for sewing machine according to claim 2, wherein: The telescopic column (12) is arranged in the installation groove (10).

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