A stay-on presser foot for a sewing machine

Abstract

The utility model discloses a kind of overlock presser feet of sewing machine, including presser foot plate and presser foot rod, presser foot rod includes link part and assembly part, and presser foot plate is provided with needle slot for needle passing and the decorative strip passage for being used for decorative strip passing, the decorative strip passage includes feed inlet and discharge port, the discharge port is communicated with needle slot or discharge port is located needle slot side, when working, needle is lifted or fallen in needle slot relative to needle, and it is transversely slipped relative to needle slot, decorative strip is located below needle slot, the presser foot plate is also equipped with overlock hole at decorative strip passage, one side of overlock hole is integrally connected with decorative strip passage, needle slot is provided with needle drop area, the other side of overlock hole extends to the outside of needle drop area, by reserving overlock hole in decorative strip passage side, needle is not sewn in the edge of decorative strip when sewing, to ensure stability, and also can prevent gap.

Description

Technical Field

[0001] This utility model relates to the field of shoemaking equipment technology, and in particular to a sewing machine presser foot for leaving an edge. Background Technology

[0002] In the prior art, a Chinese utility model patent, application number 202420486593.6, discloses a presser foot for a shoe sewing machine, including a presser plate and a presser foot rod. One end of the presser foot rod is connected to the presser plate or integrally formed therewith, and the other end is connected to the sewing machine. The presser plate is provided with a needle groove for a needle to pass through and a feeding channel for a decorative strip to pass through. The feeding channel includes a feeding port and a discharging port. The discharging port communicates with the needle groove or is located on one side of the needle groove. During operation, the needle... The needle moves up or down relative to the needle groove and slides laterally relative to the needle groove. The decorative strip is located below the needle groove. The decorative strip is sewn onto the shoe by the movement of the needle in the needle groove, making the shoe with the decorative strip more beautiful. However, when the needle goes down, the sewing position is at the edge of the decorative strip. When the needle thread is tightened, a gap will appear at the edge of the decorative strip. Occasionally, imperfections will appear at the junction of the sole and the upper. If the shoe is sewn at the right time, the decorative strip cannot cover the imperfection, which can easily affect sales. Utility Model Content

[0003] The purpose of this utility model is to overcome the defects of the prior art. This utility model provides a sewing machine presser foot with an edge allowance. By pre-leaking an edge allowance hole on one side of the decorative strip channel, the needle will not sew on the edge of the decorative strip during sewing, thereby ensuring stability. It can also cover some defects on the sole, allowing the shoe to be sold normally.

[0004] This utility model discloses a presser foot for a sewing machine, including a presser foot plate and a presser foot rod. The presser foot rod includes a connecting part integrated with the presser foot plate and an assembly part for mounting on the sewing machine. The presser foot plate is provided with a needle groove for a needle to pass through and a decorative strip channel for a decorative strip to pass through. The decorative strip channel includes an inlet and an outlet. The outlet is connected to the needle groove or located on one side of the needle groove. During operation, the needle is raised or lowered relative to the needle groove and slides laterally relative to the needle groove. The decorative strip is located below the needle groove. The presser foot plate is further provided with a rim hole at the decorative strip channel. One side of the rim hole is integrated with the decorative strip channel. The needle groove is provided with a needle drop area, and the other side of the rim hole extends outward to the outside of the needle drop area.

[0005] Using the above technical solution, the edge hole can allow a wider decorative strip to pass through during sewing. At the same time, the other side of the edge hole extends outward to the outside of the needle drop area, so that the needle will not sew on the edge of the decorative strip when sewing, but the sewing position is on the inside of the edge. There will be no gaps when sewing the decorative strip, and the reserved decorative strip can cover the top of the sole, thereby reducing the edge treatment requirements of the top of the sole.

[0006] A further feature of this invention is that when there is only one edge hole, the edge hole is located on the left or right side of the decorative strip channel; when there are two edge holes, the edge holes are located on both the left and right sides of the decorative strip channel.

[0007] Using the above technical solution, a single edge-leaving hole allows the decorative strip to have an edge on one side when sewing, while a double-sided edge-leaving hole allows the decorative strip to have an edge on both sides.

[0008] A further feature of this invention is that the decorative strip channel is arc-shaped.

[0009] By adopting the above technical solution, the decorative strips can be made more three-dimensional during the sewing process.

[0010] Further features of this invention: the feed inlet of the decorative strip channel is located on the front side of the presser foot plate, the decorative strip channel extends downwards from front to back to communicate with the needle groove, the bottom of the left side of the presser foot plate is inclined to form an abutment surface, the edge hole is straight or inclined on the presser foot plate, and the edge hole is adapted to the decorative strip channel extending downwards from front to back to communicate with the needle groove.

[0011] The above technical solution addresses the issue that some shoes have a height difference between the sole and the upper, which can easily create a stepped surface. By tilting the design, the left side of the contact surface can be raised, thus overcoming the problem of the stepped surface. Furthermore, when the edge hole is tilted, it can better adapt to the stepped surface. When the edge hole is straight, it is easier to observe during needle sewing, resulting in better stability. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of this utility model when the side hole is located on the right side and is set straight.

[0013] Figure 2 This is a schematic diagram of the structure of the present invention when the side hole is located on the right side and is tilted.

[0014] Figure 3 This is a structural diagram of the present invention when the side hole is located on the left side and is set straight.

[0015] Figure 4 This is a structural diagram of the present invention when the side hole is located on the left side and is tilted.

[0016] Figure 5 This is a schematic diagram of the structure when there are two edge holes in this utility model. Detailed Implementation

[0017] The specific embodiments of this utility model are described in detail below with reference to the accompanying drawings:

[0018] In the description of this utility model, it should be understood that the terms "upper", "lower", "bottom", "top", "front", "rear", "inner", "outer", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0019] This utility model discloses a presser foot for a sewing machine, comprising a presser foot plate 1 and a presser foot rod 2. The presser foot rod 2 includes a connecting part 21 integrally connected to the presser foot plate 1 and an assembly part 22 for mounting on the sewing machine (the assembly part 22 preferably has a threaded hole for easy assembly later). The presser foot plate 1 is provided with a needle groove 3 for a needle to pass through and a decorative strip channel 4 for a decorative strip to pass through. The decorative strip channel 4 includes an inlet and an outlet, and the outlet is connected to the needle groove 3 or located within the needle groove. On one side, during operation, the needle is raised or lowered relative to the needle groove 3 and slides laterally relative to the needle groove 3. The decorative strip is located below the needle groove 3. In this utility model embodiment, the presser foot plate 1 is also provided with a side hole 5 at the decorative strip channel 4. One side of the side hole 5 is connected to the decorative strip channel 4 as a whole. The needle groove 3 is provided with a needle dropping area 31 (the needle groove 3 is usually composed of two needle holes connected as a whole, and the needle dropping area 31 is located in the middle of the needle holes). The other side of the side hole 5 extends outward to the outside of the needle dropping area 31.

[0020] Using the above technical solution, the edge hole 5 can allow a wider decorative strip to pass through during sewing. At the same time, the other side of the edge hole 5 extends outward to the outside of the needle drop area 31, so that the needle will not sew on the edge of the decorative strip when sewing. Instead, the sewing position is on the inside of the edge, which can avoid the decorative strip from having gaps due to the needle thread tightening. In addition, the decorative strip in the reserved hole can cover part of the defects at the top of the sole.

[0021] When there is only one edge hole 5, the edge hole 5 is located on the left or right side of the decorative strip channel 4. When there are two edge holes 5, edge holes 5 are provided on both the left and right sides of the decorative strip channel 4. A single edge hole 5 allows the decorative strip to be sewn with an edge on one side. When the reserved decorative strip covers the joint between the sole and the upper, the decorative strip can cover some defects at the top of the sole, such as missing material or rough edges, which do not affect the normal use of the shoe. Double edge holes 5 allow the decorative strip to be edged on both sides. Double edge can prevent gaps or open seams on both sides of the decorative strip, further increasing stability.

[0022] The decorative strip channel 4 is arc-shaped, which makes the decorative strip more three-dimensional when sewing.

[0023] The decorative strip channel 4 has its inlet located on the front side of the presser foot plate 1. The decorative strip channel 4 extends downwards at an angle from front to back to connect with the needle groove 3. The bottom left side of the presser foot plate 1 is inclined to form a contact surface 6. The edge hole 5 is either straight or inclined on the presser foot plate 1 (when there are two edge holes 5, one can be inclined and the other straight, or both can be inclined or both straight). The edge hole 5 adapts to the decorative strip channel 4, which extends downwards at an angle from front to back to connect with the needle groove 3. Because some shoes have a height difference between the sole and the upper, which can easily form a stepped surface, the inclined setting can raise the contact surface 6 on the left side to overcome the problem of the stepped surface. Furthermore, when the edge hole 5 is inclined, it can further adapt to the stepped surface. When the edge hole 5 is straight, it is easier to observe during needle sewing, and the stability is better. Of course, the bottom left side of the presser foot plate may not have an inclined surface, as shown in the instruction manual. Figure 3 As shown, this provides more space for the straight setting of the edge holes.

Claims

1. A presser foot for a sewing machine, comprising a presser foot plate (1) and a presser foot rod (2), wherein the presser foot rod (2) comprises a connecting part (21) integrally connected with the presser foot plate (1) and an assembly part (22) for mounting on the sewing machine, and the presser foot plate (1) is provided with a needle groove (3) for a needle to pass through and a decorative strip channel (4) for a decorative strip to pass through, wherein the decorative strip channel (4) comprises an inlet and an outlet, the outlet being connected to the needle groove (3) or located on one side of the needle groove (3), wherein during operation, the needle is raised or lowered relative to the needle groove (3) and slides laterally relative to the needle groove (3), and the decorative strip is located below the needle groove (3), characterized in that: The presser foot plate (1) is also provided with a side hole (5) at the decorative strip channel (4). One side of the side hole (5) is connected to the decorative strip channel (4) as a whole. The needle groove (3) is provided with a needle drop area (31). The other side of the side hole (5) extends outward to the outside of the needle drop area (31).

2. The presser foot for a sewing machine according to claim 1, characterized in that: When there is only one edge hole (5), the edge hole (5) is set on the left or right side of the decorative strip channel (4). When there are two edge holes (5), the edge holes (5) are set on both the left and right sides of the decorative strip channel (4).

3. A sewing machine presser foot according to claim 1 or 2, characterized in that: The decorative strip channel (4) is arranged in an arc shape.

4. The presser foot for a sewing machine according to claim 3, characterized in that: The inlet of the decorative strip channel (4) is located on the front side of the presser foot plate (1). The decorative strip channel (4) extends downward from front to back to communicate with the needle groove (3). The bottom of the left side of the presser foot plate (1) is inclined to form an abutment surface (6). The edge hole (5) is straight or inclined on the presser foot plate (1), and the edge hole (5) is adapted to the decorative strip channel (4) extending downward from front to back to communicate with the needle groove (3).

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