Adjustable presser foot mechanism

Abstract

The utility model provides an adjustable presser foot mechanism which comprises a presser foot plate, a presser foot frame and a presser foot rod used for installing the presser foot frame, the presser foot rod is arranged on a machine shell, the presser foot frame is arranged on the presser foot rod in a sliding mode, a sliding structure is arranged between the presser foot frame and the presser foot rod, an inserting groove for the presser foot frame to slide is formed in the presser foot rod, and the presser foot frame is arranged in the inserting groove. The sliding structure comprises a sliding groove formed in the presser foot frame and a bolt penetrating through the sliding groove to connect and fix the presser foot rod and the presser foot frame. The position of the presser foot can be adjusted left and right, and adjustment is convenient and accurate.

Description

Technical Field

[0001] This utility model relates to the field of sewing machine technology, and in particular to an adjustable presser foot mechanism. Background Technology

[0002] The presser foot of a sewing machine is used to move the fabric back and forth by the lower feed dog, pressing the fabric firmly, preventing wrinkles, and evenly pressing two pieces of fabric together. Existing presser feet are usually fixed to the presser foot bar and cannot be adjusted left or right (left and right refer to the direction perpendicular to the feed direction). However, errors may occur during installation, resulting in poor fit with the feed dog at the bottom of the needle plate. Furthermore, the fixed position and inability to adjust left or right mean that various sizes of presser feet are needed to meet the sewing process requirements for different seam sizes, which is quite cumbersome. Utility Model Content

[0003] To address the problems of the prior art, this utility model provides an adjustable presser foot mechanism that allows the presser foot to slide left and right to adjust its position, enabling it to better cooperate with the feed dog for fabric feeding. The adjustment is convenient and precise.

[0004] The technical solution adopted is as follows:

[0005] An adjustable presser foot mechanism includes a presser foot plate, a presser foot bracket, and a presser foot rod for mounting the presser foot bracket. The presser foot rod is mounted on a housing, and the presser foot bracket is slidably mounted on the presser foot rod. A sliding structure is provided between the presser foot bracket and the presser foot rod. The presser foot rod has a slot for the presser foot bracket to slide. The sliding structure includes a groove on the presser foot bracket and bolts passing through the groove to connect and fix the presser foot rod and the presser foot bracket.

[0006] Furthermore, the upper end of the presser foot bracket is provided with a mounting plate for installing a sliding structure, the sliding groove is provided on the mounting plate, and the mounting plate can be slidably disposed in the slot.

[0007] Furthermore, the presser foot plate includes a first presser foot plate and a second presser foot plate that are rotatably connected to the two side plates of the presser foot frame, respectively. The first and second presser foot plates are rotatably connected to the presser foot frame by a first pin and a second pin, respectively. Both the first and second presser foot plates are provided with an adjustable angle adjustment structure.

[0008] Furthermore, the adjustment structure includes a spring disposed between the presser foot plate and the presser foot frame, and a spring is disposed between the first and second presser foot plates and the presser foot frame respectively. The presser foot frame is provided with a plurality of grooves for suspending one end of the corresponding spring and for adjusting the tension of the spring.

[0009] Furthermore, the lower end of the presser foot plate is provided with an arc-shaped boss.

[0010] Furthermore, the presser foot plate is provided with an adjustment groove at the second pin.

[0011] Furthermore, the presser foot plate is provided with an upwardly extending protrusion, and the upper end of the presser foot plate is provided with a limiting structure that cooperates with the protrusion and is fixedly installed.

[0012] Furthermore, the presser foot rod is provided with a mounting block at the upper end of the presser foot frame, and the limiting structure is adjustablely mounted on the mounting block.

[0013] Furthermore, the mounting plate has graduations at the mating point with the pressure foot rod.

[0014] Furthermore, the presser foot bracket is provided with a screw that can drive the protrusion on the presser foot plate to rotate the presser foot plate around the first pin.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0016] This invention provides an adjustable presser foot mechanism, including a presser foot rod and a presser foot bracket mounted on the presser foot rod. The presser foot bracket is used to mount the presser foot plate and can slide left and right relative to the presser foot rod. A sliding structure is provided between the presser foot bracket and the presser foot rod. The sliding structure includes a groove on the presser foot bracket and a slot on the presser foot rod. The presser foot bracket can slide within the slot. A bolt is provided in the groove to connect and fix the presser foot bracket and the presser foot rod. The presser foot bracket also has a scale at the mating point with the presser foot rod. By loosening the bolt, the left and right sliding of the presser foot bracket can be adjusted according to the scale. Finally, the bolt is tightened to fix the connection. Adjustment is convenient and quick, and the scale provides a more precise adjustment. Compared with the fixed presser foot of the prior art, this invention allows for left and right adjustment of the presser foot plate position, enabling better engagement between the presser foot plate and the feed dog. This meets the process requirements of various seam allowance specifications in garment manufacturing, reduces operating costs, decreases presser foot replacement time, and improves production efficiency. Attached Figure Description

[0017] Figure 1 , 2 Figures 1 and 4 are structural schematic diagrams of this utility model from different angles;

[0018] Figure 3 , 5 These are schematic diagrams of the structure of this utility model from different angles;

[0019] Figure 6 for Figure 5 Enlarged view at point a;

[0020] The components include: 1. Presser foot plate; 101. First presser foot plate; 102. Second presser foot plate; 2. Presser foot bracket; 3. Screw; 4. Presser foot rod; 5. Sliding structure; 501. Slide groove; 502. Bolt; 6. Mounting plate; 7. Slot; 8. Spring; 901. First pin; 902. Second pin; 10. Groove; 11. Protrusion; 12. Limiting structure; 1201. Arc-shaped boss; 13. Adjusting groove; 14. Mounting block; 15. Adjusting structure; 16. Scale; 17. Detailed Implementation

[0021] The present invention will be further described below with reference to specific embodiments.

[0022] refer to Figure 1-6 An adjustable presser foot mechanism includes a presser foot plate 1, a presser foot bracket 2, and a presser foot rod 4 for mounting the presser foot bracket 2. The presser foot rod 4 is mounted on the machine housing. The presser foot bracket 2 is slidably mounted on the presser foot rod 4. A sliding structure 5 is provided between the presser foot bracket 2 and the presser foot rod 4. The presser foot rod 4 is provided with a slot 7 for sliding the presser foot bracket 2. The sliding structure 5 includes a sliding groove 501 on the presser foot bracket 2 and a bolt 502 passing through the sliding groove 501 to connect and fix the presser foot rod 4 and the presser foot bracket 2.

[0023] The presser foot bracket 2 has a mounting plate 6 at its upper end with a sliding structure. A sliding groove 501 is provided on the mounting plate 6, which can slide within a slot 7. The presser foot bracket 2 has a sliding groove 501. During adjustment, loosening the bolt 502 allows the mounting plate 6 to slide within the slot 7 to adjust its position, while the bolt 502 also slides within the sliding groove 501. The position of the presser foot 1 can be adjusted by sliding left and right as needed, allowing for better cooperation between the presser foot 1 and the feed teeth for fabric feeding. The left and right sliding refers to the direction perpendicular to the feeding direction. After adjustment, the position of the presser foot bracket 2 can be fixed by tightening the bolt 502.

[0024] Preferably, the mounting plate 6 is provided with a scale 17 at the mating point of the presser foot rod 4, so that the position of the presser foot bracket and the presser foot plate 1 can be precisely adjusted with reference to the scale 17.

[0025] The presser foot plate 1 includes a first presser foot plate 101 and a second presser foot plate 102 that are rotatably connected to the two side plates of the presser foot frame 2. The first and second presser foot plates are rotatably connected to the presser foot frame by a first pin 901 and a second pin 902, respectively. Both the first and second presser foot plates are provided with an adjustable angle adjustment structure 16.

[0026] The adjustment structure 16 includes a spring 8 disposed between the presser foot plate and the presser foot frame 2. A spring 8 is disposed between the first and second presser foot plates and the presser foot frame 2 respectively. The presser foot frame 2 is provided with a plurality of grooves 10 for suspending one end of the corresponding spring and for adjusting the tension of the spring.

[0027] The presser foot plate 1 has an upwardly extending protrusion 11, and a limiting structure 12 that cooperates with and is fixedly installed on the upper end of the presser foot plate. Both the first and second presser foot plates have a protrusion, and the limiting structure 12 includes two limiting blocks 1201 that cooperate with the two protrusions respectively. When the presser foot rod 4 lifts the presser foot plate 1 upwards, the "head end" of the presser foot plate 1 tends to tilt downwards, making it difficult to insert thicker fabric from the "head end" when starting to sew. The limiting structure 12 at the upper end of the presser foot plate 1 prevents the protrusion 11 from being blocked by the limiting blocks when the presser foot plate 1 is lifted, allowing the "head end" of the presser foot plate to rise and preventing the fabric from being too low and affecting the insertion of the fabric. The "head end" refers to the end closer to the needle bar, and the "tail end" refers to the end farther from the needle bar.

[0028] Both the first and second presser feet are provided with mounting holes that mate with the first pin 901, and both the first and second presser feet are provided with adjusting grooves 14 that mate with the second pin 901. By adjusting the spring 8 and engaging different grooves 10, the first or second presser foot can rotate around the first pin 901, thereby adjusting the lifting angle of the corresponding presser foot. The first and second presser feet can be adjusted independently, allowing for appropriate angle adjustments based on the fabric thickness to fit fabrics of different thicknesses and processes, preventing wrinkles during fabric stitching.

[0029] The presser foot bracket 2 is equipped with a screw 3 that drives the protrusion 11 to rotate the presser foot plate 1 around the first pin 901. Adjusting the screw 3 against the protrusion 11 can drive the entire presser foot plate 1 to rotate, thereby adjusting the rotation angle of the presser foot plate 1 and the pressure of the material. There are two screws 3, corresponding to the first presser foot plate and the second presser foot plate respectively, and the first and second presser foot plates can be adjusted separately.

[0030] The presser foot 1 has an arc-shaped protrusion 13 at its lower end. When the feed dog descends below the bottom plane of the presser foot, the arc-shaped protrusion 13 presses the fabric down into a downward arc, which can lengthen the fabric to a certain extent, making the sewing smoother. It also provides a certain amount of allowance for the needle to move upward and the thread to be cut after the sewing is finished, preventing the fabric from being pulled back by the thread on the upward-moving needle.

[0031] The presser foot rod 4 is located on the upper end of the presser foot bracket 2 and is equipped with a mounting block 15. The limiting structure 12 is adjustablely mounted on the mounting block 15. The limiting structure 12 can slide and adjust on the mounting block 15 according to the position of the presser foot bracket 2, keeping the limiting block and the protrusion 11 in cooperation.

[0032] The above description is only an optional embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the inventive concept of the present utility model using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. An adjustable presser foot mechanism, comprising a presser foot plate (1), a presser foot bracket (2), and a presser foot rod (4) for mounting the presser foot bracket (2), wherein the presser foot rod (4) is disposed on a machine housing, characterized in that: The presser foot bracket (2) is slidably mounted on the presser foot rod (4). A sliding structure (5) is provided between the presser foot bracket (2) and the presser foot rod (4). The presser foot rod (4) is provided with a slot (7) for the presser foot bracket (2) to slide. The sliding structure (5) includes a sliding groove (501) on the presser foot bracket (2) and a bolt (502) that passes through the sliding groove (501) to connect and fix the presser foot rod (4) and the presser foot bracket (2).

2. The adjustable presser foot mechanism as described in claim 1, characterized in that: The upper end of the presser foot bracket (2) is provided with a mounting plate (6) for mounting a sliding structure. The sliding groove (501) is provided on the mounting plate (6), and the mounting plate (6) can be slidably disposed in the slot (7).

3. The adjustable presser foot mechanism as described in claim 1, characterized in that: The presser foot plate (1) includes a first presser foot plate (101) and a second presser foot plate (102) that are rotatably connected to the two side plates of the presser foot frame (2). The first and second presser foot plates are rotatably connected to the presser foot frame by a first pin (901) and a second pin (902), respectively. The first and second presser foot plates are provided with an adjustable angle adjustment structure (16).

4. The adjustable presser foot mechanism as described in claim 3, characterized in that: The adjustment structure (16) includes a spring (8) between the presser foot plate and the presser foot frame (2). A spring (8) is provided between the first and second presser foot plates and the presser foot frame (2). The presser foot frame (2) is provided with a number of grooves (10) for suspending one end of the corresponding spring and for adjusting the tension of the spring.

5. The adjustable presser foot mechanism as described in claim 1, characterized in that: The lower end of the presser foot plate (1) is provided with an arc-shaped boss (13).

6. The adjustable presser foot mechanism as described in claim 3, characterized in that: The presser foot plate (1) is provided with an adjustment groove (14) at the second pin (902).

7. The adjustable presser foot mechanism as described in claim 1, characterized in that: The presser foot plate (1) is provided with an upwardly extending protrusion (11), and the upper end of the presser foot plate is provided with a limiting structure (12) that cooperates with the protrusion (11) and is fixedly installed.

8. The adjustable presser foot mechanism as described in claim 7, characterized in that: The presser foot rod (4) is located on the upper end of the presser foot frame (2) and is provided with a mounting block (15). The limiting structure (12) is adjustablely mounted on the mounting block (15).

9. The adjustable presser foot mechanism as described in claim 2, characterized in that: The mounting plate (6) is provided with a scale (17) at the mating point of the presser foot rod (4).

10. The adjustable presser foot mechanism as described in claim 3, characterized in that: The presser foot bracket (2) is provided with a screw (3) that can drive the protrusion (11) on the presser foot plate (1) to rotate the presser foot plate (1) around the first pin (901).

Images