A crease-proof structure suitable for a fabric sewing machine

Abstract

The utility model relates to sewing equipment technical field especially suitable for wrinkle -resistant structure of fabric sewing machine, including pressure foot mounting spare, middle axle, anti -crease pressing block and middle pressure block etc., the lower part of pressure foot mounting spare front side is equipped with middle axle, middle pressure block fixedly connected in the middle part of middle axle, anti -crease pressing block includes left side pressing block and right side pressing block who sets up left and right symmetrical, left side pressing block and right side pressing block are rotatedly connected with pressure foot mounting spare through middle axle respectively, and left side pressing block and right side pressing block can swing independently around middle axle, and the operation groove that middle pressure block front side is equipped with supplies the sewing material and passes. The utility model discloses through setting up anti -crease pressing block to include the left side pressing block and right side pressing block who can swing independently, and through the integrated connection with middle pressure block of middle axle, makes both sides pressing block can independently adjust the pressure tightness according to the fabric thickness difference, has reached the effect that prevents the thin side fabric from warping, thick side excessive oppression, has improved the adaptation ability of the asymmetric sewing of fabric significantly.

Description

Technical Field

[0001] This utility model relates to the field of sewing equipment technology, and in particular to an anti-wrinkle structure suitable for fabric sewing machines. Background Technology

[0002] During fabric sewing, due to improper coordination between the feeding mechanism and the presser foot, uneven fabric tension, or differences in material properties, wrinkles and twists often occur when the fabric enters the sewing area, especially when sewing thin, elastic, or easily deformable fabrics. Wrinkles not only affect the flatness and aesthetics of the stitches, but can also lead to quality problems such as misalignment, skipped stitches, and broken threads, reducing product yield and production efficiency.

[0003] Most existing sewing machine presser foot structures only have a pressing function and lack the ability to flatten and adjust the tension of the fabric. Although some machines have auxiliary presser feet or fabric spreading devices, their structures are complex, inconvenient to adjust, and difficult to adapt to the processing needs of different fabrics. In addition, when sewing two pieces of fabric with different thicknesses, such as splicing thick and thin fabrics, binding, folding and sewing, traditional presser feet or anti-wrinkle structures are usually rigid as a whole or a single floating structure, which cannot achieve independent pressure adjustment on both sides. The thicker side needs more space to accommodate the fabric, which causes the presser foot on the thinner side to rise and not be able to press effectively, which easily leads to problems such as lifting, slippage, and uneven stitches, seriously affecting the sewing quality. There is currently no anti-wrinkle pressing device with a simple structure, sensitive response, and the ability to adapt to the difference in thickness on both sides.

[0004] Therefore, it is necessary to design an anti-wrinkle structure suitable for fabric sewing machines to solve the above-mentioned technical problems. Summary of the Invention

[0005] In order to overcome the shortcomings of existing sewing machine presser foot structures, such as lack of front anti-wrinkle function, poor adaptability to fabrics, complex structure of traditional anti-wrinkle devices, non-replaceable pressure rollers, and inability to achieve independent pressing when sewing fabrics with uneven thickness on both sides, resulting in the thinner side fabric curling up or not being pressed firmly, this utility model provides an anti-wrinkle structure suitable for fabric sewing machines.

[0006] The technical solution is as follows: A wrinkle-resistant structure suitable for fabric sewing machines includes a presser foot mounting component, a central shaft, a wrinkle-resistant pressure block, a central pressure block, a connector, a connecting rod, and a tension spring. The presser foot mounting component has a central shaft at its lower front side. The central pressure block is fixedly connected to the middle of the central shaft. The wrinkle-resistant pressure block includes a left pressure block and a right pressure block symmetrically arranged on the left and right sides. The left and right pressure blocks are rotatably connected to the presser foot mounting component through the central shaft, and the left and right pressure blocks can swing independently around the central shaft. The front side of the central pressure block has a working groove for the sewing material to pass through. The rear sides of the left and right pressure blocks are fixedly connected to the connectors, and the rear side of the presser foot mounting component is fixedly connected to the connecting rod. The connector and the connecting rod are connected by a tension spring.

[0007] As a further preferred option, the anti-wrinkle block has three sets of mounting grooves on the left and right sides of its bottom along the length direction.

[0008] As a further preferred option, sliding grooves are provided on both the front and rear sides of each set of mounting slots.

[0009] As a further preferred embodiment, it also includes a reed, which is slidably connected in a sliding groove, and has a protrusion in the middle.

[0010] As a further preferred option, it also includes a mounting shaft, with two opposite mounting slots connected to the mounting shaft by a spring.

[0011] As a further preferred option, it also includes a pressure roller, with the pressure roller mounted on the mounting shaft.

[0012] The beneficial effects are as follows: 1. By setting the anti-wrinkle pressure block to include a left pressure block and a right pressure block that can swing independently, and integrating them with the middle pressure block through the central shaft, the pressure blocks on both sides can independently adjust the pressing force according to the difference in fabric thickness, thereby achieving the effect of preventing the thin side fabric from curling up and the thick side from being excessively compressed, and significantly improving the adaptability to asymmetrical sewing of fabric.

[0013] This invention achieves quick assembly and disassembly of the pressure rollers by setting mounting grooves with sliding grooves at the bottom of the left and right pressure blocks, and by combining them with springs and detachable mounting shaft structures. This facilitates the replacement of pressure rollers with different patterns or specifications and adapts to the processing needs of various fabrics.

[0014] This invention achieves dual control by setting a working groove for the sewing material to pass through on the front side of the central pressure block, combined with the independently floating pressure block structure on both sides, thus improving the sewing accuracy and product appearance quality. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the first three-dimensional structure of this utility model.

[0016] Figure 2 This is a schematic diagram of the second three-dimensional structure of the present invention.

[0017] Figure 3 for Figure 2 Enlarged diagram of point A in the middle.

[0018] Figure 4 This is a schematic diagram of the exploded structure of this utility model.

[0019] The components are: 1_presser foot mounting part, 2_central shaft, 3_anti-wrinkle pressure block, 4_central pressure block, 5_connector, 6_connecting rod, 7_tension spring, 8_mounting shaft, 9_pressure roller, 10_spring sheet, 11_sliding groove. Detailed Implementation

[0020] Example: A wrinkle-resistant structure suitable for fabric sewing machines, such as... Figures 1-4 As shown, the device includes a presser foot mounting component 1, a central shaft 2, an anti-wrinkle presser block 3, a central presser block 4, a connector 5, a connecting rod 6, and a tension spring 7. The presser foot mounting component 1 has a central shaft 2 located on its lower front side. The central presser block 4 is welded to the center of the central shaft 2. The anti-wrinkle presser block 3 includes a left and right symmetrically arranged presser block. The left and right presser blocks are rotatably connected to the presser foot mounting component 1 via the central shaft 2, and can swing independently around the central shaft 2. The front side of the central presser block 4 has a working groove for the sewing material to pass through. The rear sides of the left and right presser blocks are integrally connected to the connector 5. A connecting rod 6 is bolted to the rear side. The connecting piece 5 is connected to the connecting rod 6 by a tension spring 7. Three sets of mounting grooves are opened on the left and right sides of the bottom of the anti-wrinkle pressure block 3 along the length direction. Each set of mounting grooves has sliding grooves 11 on the front and rear sides. The spring 10 is slidably connected in the sliding groove 11. The spring 10 has a protrusion in the middle. The two opposite mounting grooves are rotatably connected by the spring 10 and the mounting shaft 8. The mounting shaft 8 is equipped with a pressure roller 9. By pressing the pressure roller 9, the spring 10 is elastically deformed, and the mounting shaft 8 is disengaged from the spring 10, so that the pressure roller 9 can be replaced. The surface of the pressure roller 9 has a replaceable pattern structure.

[0021] During use, the anti-wrinkle structure is fixed to the front end of the fabric sewing machine head via the presser foot mounting piece 1, located in front of the main presser foot. When the fabric enters the sewing area from the working groove, the middle pressure block 4 is fixedly connected to the central shaft 2 through its middle part, maintaining stable pressure at the center position of the sewing area. Under the elastic tension of the tension spring 7, the left and right pressure blocks contact the fabric surface on the corresponding sides respectively, applying pre-pressure to the fabric that is about to enter the sewing area.

[0022] Since the left and right pressure blocks can swing independently around the central axis 2, when the thickness of the fabric on both sides is inconsistent, such as one side being a single layer of fabric and the other side being a double layer, the pressure block on the thicker side can swing upward to make way, while the pressure block on the thinner side can still maintain downward pressure, avoiding the phenomenon of lifting or not pressing properly, achieving differentiated bonding, effectively flattening the fabric of different thicknesses, and preventing wrinkles or misaligned seams caused by uneven pressure.

[0023] Furthermore, the pressure roller 9 is rotatably connected to the mounting grooves at the bottom of the left and right pressure blocks via the mounting shaft 8. Both ends of the mounting shaft 8 are elastically held in the sliding groove 11 by springs 10. The protrusion in the middle of the spring 10 is embedded in the sliding groove 11 to achieve guidance and limitation.

[0024] When the pressure roller 9 needs to be replaced, press down on the pressure roller 9. The pressure is transmitted to the spring 10 through the mounting shaft 8, causing the spring 10 to deform elastically and open at both ends. The mounting shaft 8 is then released from the spring 10, and the pressure roller 9 can be removed together with the mounting shaft 8 for quick replacement. The replaced pressure roller 9 can apply a specific textured indentation to the fabric or adjust the contact pressure to adapt to different materials or process requirements. The tension spring 7 continuously provides back tension to ensure that the pressure blocks on both sides always fit the surface of the fabric, ensuring a stable and reliable anti-wrinkle effect.

Claims

1. A wrinkle-resistant structure suitable for fabric sewing machines, characterized in that: It includes a presser foot mounting component (1), a central shaft (2), an anti-wrinkle presser block (3), a central presser block (4), a connector (5), a connecting rod (6), and a tension spring (7). The presser foot mounting component (1) has a central shaft (2) at the lower front side. The central presser block (4) is fixedly connected to the middle of the central shaft (2). The anti-wrinkle presser block (3) includes a left presser block and a right presser block arranged symmetrically on the left and right sides. The left presser block and the right presser block are rotatably connected to the presser foot mounting component (1) through the central shaft (2), and the left presser block and the right presser block can swing independently around the central shaft (2). The front side of the central presser block (4) has a working groove for the sewing material to pass through. The rear side of the left presser block and the right presser block are fixedly connected to the connector (5), and the rear side of the presser foot mounting component (1) is fixedly connected to the connecting rod (6). The connector (5) and the connecting rod (6) are connected by a tension spring (7).

2. The anti-wrinkle structure for a fabric sewing machine as described in claim 1, characterized in that: The anti-wrinkle pressure block (3) has three sets of mounting grooves on the left and right sides of the bottom along the length direction.

3. The anti-wrinkle structure for a fabric sewing machine as described in claim 2, characterized in that: Each set of mounting slots has sliding grooves (11) on both the front and rear sides.

4. The anti-wrinkle structure suitable for a fabric sewing machine as described in claim 3, characterized in that: It also includes a reed (10), which is slidably connected in the sliding groove (11), and the reed (10) has a protrusion in the middle.

5. The anti-wrinkle structure for a fabric sewing machine as described in claim 4, characterized in that: It also includes a mounting shaft (8), and two mounting slots on the left and right sides are connected to the mounting shaft (8) by means of a spring (10).

6. The anti-wrinkle structure for a fabric sewing machine as described in claim 5, characterized in that: It also includes a pressure roller (9), and the mounting shaft (8) is equipped with a pressure roller (9).

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