Improved sewing machine presser foot structure capable of preventing hooking in sewing process

Abstract

The sewing machine presser foot improved structure capable of preventing hooking in the sewing process comprises a sewing machine presser foot body, the sewing machine presser foot body comprises an inner presser foot and an outer presser foot, an n-shaped steel wire inclining forwards and upwards is smoothly spliced at the front end of the outer presser foot so as to eliminate an exposed sharp corner at the front end of the outer presser foot, and bosses at the left end and the right end of the outer presser foot are cut off. A stand column steel wire is smoothly spliced to the front end of the inner presser foot so that the section of the front end of the inner presser foot can be lifted. By means of the specially-designed anti-hanging accessory, the risk that the presser foot hooks long looped pile materials is remarkably reduced, smoothness of the sewing process is guaranteed, the problems of jamming and needle breakage of the sewing machine caused by hooking of the materials are avoided, the service life of the sewing machine is prolonged, material scrapping caused by hooking is reduced, production cost is reduced, and the sewing machine is worthy of popularization and application. The production benefit of the sewing machine is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to chair surface cover sewing machine technical field, especially in a kind of sewing machine presser foot improved structure of preventing sewing process hook. BACKGROUND

[0002] The existing sewing process is to select the presser foot of sewing machine original, and the main function of the presser foot is to cooperate with the cloth feeding device below the material to transport the material needing to be sewn from front to back and guide the material to be transported according to the predetermined sewing track of the sewing operator.

[0003] The prior art is relatively smooth when sewing the material with smooth surface or short pile, but when the material has long loops (such as prickly cloth, 3D mesh cloth, miler cotton, etc.), the front end of the presser foot often drills into part of the loops during the transportation process, so that the loops are firmly hooked on the presser foot. During the sewing process, the material is usually transported quickly from back to front, and it is necessary to ensure that the material transportation is not blocked. When part of the material (loops) is hooked, the material cannot escape by itself and is pulled back in reverse, so as to quickly gather above or around the presser foot, thereby hindering the material to continue to move forward. The slight hooking will cause the material to have a silk pulling defect, and the serious hooking will cause the sewing machine to jam, the needle to break and the material to be scrapped. CONTENT OF THE UTILITY MODEL

[0004] In view of the problems existing in the prior art, the utility model aims to provide a sewing machine presser foot improved structure for preventing hooking during the sewing process, so as to prevent the presser foot from being hooked on the long-loop material and ensure the smoothness of the sewing process.

[0005] In order to achieve the above-mentioned purpose, the utility model provides a sewing machine presser foot improved structure for preventing hooking during the sewing process, which comprises a sewing machine presser foot body, the sewing machine presser foot body comprises an inner presser foot and an outer presser foot, a n-shaped steel wire inclined forward and upward is smoothly spliced at the front end of the outer presser foot to eliminate the sharp corners exposed at the front end, and the bosses at the left and right ends are cut off to make the left and right surfaces of the outer presser foot smooth and flat, and a column steel wire is smoothly spliced at the front end of the inner presser foot to raise the front end section.

[0006] In the above-mentioned scheme, the inclination angle of the n-shaped steel wire relative to the horizontal line is 120-130°, and the length is 9-10 mm. The increased accessories do not affect the operation of the sewing machine under this size.

[0007] In the above-mentioned scheme, the inclination angle of the n-shaped steel wire relative to the horizontal line is 124°, and the length is 9.8 mm. The specific operation is as follows: a 124° chamfer is cut at the bottom end of the n-shaped steel wire. After the steel wire with chamfer is spliced with the original plane, a forward and upward inclined horn mouth is formed to avoid the horizontal position of the steel wire from blocking the operator's view. The operator can easily observe the stress position below the presser foot through the horn mouth, and the human-machine engineering is fully considered.

[0008] In the above solution: the length of the column wire is 10mm, and the increased accessory does not affect the operation of the sewing machine at this size.

[0009] In the above solution: the n-shaped wire and the column wire are both steel wires with a diameter of 1.5mm, which facilitates smooth transition connection with the corresponding presser foot at this size, and such type of steel wire is widely used in many fields, with low material cost.

[0010] The beneficial effects of the utility model are: 1. The specially designed anti-hanging accessory significantly reduces the risk of the presser foot hanging on the long loop material, ensures the smoothness of the sewing process, avoids the problems of sewing machine jamming and needle breakage caused by material hooking, and prolongs the service life of the sewing machine. 2. The material scrap caused by hooking is reduced, the production cost is reduced, the production efficiency of the sewing machine is improved, and after mass production verification, the long loop fabric material scrap rate is reduced from 30% to 0% after using the new presser foot. 3. After cutting off the two sides of the outer presser foot, the overall width of the presser foot is smaller, which can be used for sewing materials with smaller passing paths (such as U-shaped or L, J-shaped grooves), and the application range of the presser foot is wider. BRIEF DESCRIPTION OF DRAWINGS

[0011] The above and / or additional aspects and advantages of the utility model will become apparent and more readily appreciated from the following description of the embodiments, with reference to the following drawings, in which:

[0012] Figure 1 is a three-view (from left to right, the front view, side view and top view) of the traditional inner presser foot.

[0013] Figure 2 is a three-view (from left to right, the front view, side view and top view) of the traditional outer presser foot.

[0014] Figure 3 is a schematic diagram of the traditional sewing machine presser foot body.

[0015] Figure 4 is a three-view (from left to right, the front view, side view and top view) of the inner presser foot in the utility model.

[0016] Figure 5 is a three-view (from left to right, the front view, side view and top view) of the outer presser foot in the utility model.

[0017] Figure 6 is a schematic diagram of the sewing machine presser foot body in the utility model. DETAILED DESCRIPTION

[0018] As Figure 4As shown in Fig. 6, the improved structure of the presser foot of the sewing machine to prevent the sewing process from being hooked, comprising a presser foot body, the presser foot body comprising an inner presser foot 1 and an outer presser foot 2.

[0019] A n-shaped steel wire 3 is smoothly spliced at the front end of the outer presser foot 2 to eliminate the exposed sharp corners at the front end, and the bosses 5 at the left and right ends are cut off, so that the left and right sides of the outer presser foot 2 are smooth and flat. A column steel wire 4 is smoothly spliced at the front end of the inner presser foot 1 to raise the cross section of the front end. The smooth splicing here refers to splicing the two and polishing the splicing part smooth.

[0020] The structure significantly reduces the risk of the presser foot hooking the long pile material through the specially designed anti-hooking accessories, ensures the smoothness of the sewing process, avoids the problems of sewing machine jamming and needle breaking caused by material hooking, prolongs the service life of the sewing machine, reduces the material scrap caused by hooking, reduces the production cost, and improves the production efficiency of the sewing machine.

[0021] Preferably, the inclination angle of the n-shaped steel wire 3 relative to the horizontal line is 120-130°, and the length is 9-10mm, and the added accessories do not affect the operation of the sewing machine at this size.

[0022] Preferably, the inclination angle of the n-shaped steel wire 3 relative to the horizontal line is 124°, and the length is 9.8mm. The specific operation is: cutting a 124° chamfer at the bottom end of the n-shaped steel wire 3, and after splicing the chamfered steel wire with the original plane, a forward and upward inclined horn is formed, which avoids the horizontal position of the steel wire from blocking the operator's view. The operator can easily observe the stress position below the presser foot through the horn, fully considering the ergonomics.

[0023] Preferably, the length of the column steel wire 4 is 10mm, and the added accessories do not affect the operation of the sewing machine at this size.

[0024] Preferably, the n-shaped steel wire 3 and the column steel wire 4 are both steel wires with a diameter of 1.5mm, which is convenient for smooth transition connection with the corresponding presser foot at this size, and this type of steel wire is widely used in many fields, and the material cost is low.

Claims

1. An improved structure for a sewing machine presser foot to prevent snagging during sewing, comprising a sewing machine presser foot body, wherein the sewing machine presser foot body includes an inner presser foot (1) and an outer presser foot (2), characterized in that: A forward- and upward-sloping n-shaped steel wire (3) is smoothly spliced ​​at the front end of the outer presser foot (2) to eliminate the exposed sharp corners at the front end, and the protrusions (5) at both ends of the outer presser foot (2) are cut off, so that the left and right sides of the outer presser foot (2) are smooth and flat. A column steel wire (4) is smoothly spliced ​​at the front end of the inner presser foot (1) to raise its front end section.

2. The improved sewing machine presser foot structure for preventing snagging during sewing as described in claim 1, characterized in that: The inclination angle of the n-shaped steel wire (3) relative to the horizontal line is 120-130°, and its length is 9-10mm.

3. The improved sewing machine presser foot structure for preventing snagging during sewing as described in claim 2, characterized in that: The n-shaped steel wire (3) has an inclination angle of 124° relative to the horizontal line and a length of 9.8 mm.

4. The improved sewing machine presser foot structure for preventing snagging during sewing as described in claim 2, characterized in that: The length of the column steel wire (4) is 10mm.

5. The improved sewing machine presser foot structure for preventing snagging during sewing as described in claim 2, characterized in that: The n-shaped steel wire (3) and the column steel wire (4) are both steel wires with a diameter of 1.5 mm.

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