Presser foot assembly

Abstract

This utility model discloses a presser foot assembly, relating to the technical field of sewing machine parts. The presser foot assembly is used in a sewing device, which includes a sewing needle and a sewing plate for holding fabric. A fabric-pushing gear is provided on the sewing plate corresponding to the presser foot. The presser foot assembly includes a flat presser foot and an auxiliary tool. The flat presser foot includes a presser foot handle and a presser foot plate. The bottom of the presser foot handle is hinged to the presser foot plate, and there is a gap between the bottom of the presser foot handle and the presser foot plate. The presser foot plate has a needle groove for the sewing needle to pass through. In the fabric feeding direction, the needle groove is located in front of the presser foot handle. The auxiliary tool can be inserted into the gap in the fabric feeding direction, causing the presser foot plate to rotate relative to the presser foot handle. On the sewing plate, the rear end of the presser foot plate is moved away from the sewing plate, and the auxiliary tool is located to the side of the needle groove. The technical solution provided by this utility model can avoid frequent presser foot changes during garment sewing.

Description

Technical Field

[0001] This utility model relates to the technical field of sewing machine parts, and in particular to a presser foot assembly. Background Technology

[0002] In garment manufacturing, the gathering process is a crucial step that significantly impacts the quality and aesthetics of the finished garment. During sewing, a flat presser foot is typically used to sew the fabric together. To create a gathering effect, the flat presser foot must be replaced with a gathering presser foot, and after gathering, it must be replaced back with a flat presser foot to continue sewing. Changing presser feet requires using a screwdriver to remove the old presser foot from the sewing machine and then installing the new one, which is time-consuming and labor-intensive. Care must be taken to avoid collisions between the presser foot and the sewing needle to prevent misalignment. Furthermore, after each presser foot change, its position needs to be corrected to prevent stitch deviations that could affect garment quality. However, manually adjusting the presser foot to match its original position requires considerable skill and experience from the sewing worker. Utility Model Content

[0003] The main purpose of this invention is to provide a presser foot assembly that avoids the need for frequent presser foot replacements during garment sewing.

[0004] To achieve the above objectives, the present invention proposes a presser foot assembly for use in a sewing device. The sewing device includes a sewing needle and a sewing plate for placing fabric. A fabric-pushing gear is provided on the sewing plate corresponding to the presser foot. The presser foot assembly includes:

[0005] A flat presser foot includes a presser foot handle and a presser foot plate. The bottom of the presser foot handle is hinged to the presser foot plate, and there is a gap between the bottom of the presser foot handle and the presser foot plate. The presser foot plate is provided with a needle groove for the sewing needle to pass through. In the fabric feeding direction, the needle groove is located on the front side of the presser foot handle.

[0006] An auxiliary tool is inserted into the gap in the fabric feeding direction to rotate the presser foot relative to the presser foot handle on the sewing board, so that the rear end of the presser foot is away from the sewing board, and the auxiliary tool is located to the side of the needle groove.

[0007] In one embodiment, multiple auxiliary tools are provided, and the multiple auxiliary tools can be inserted into the gap simultaneously.

[0008] In one embodiment, a plurality of the auxiliary tools can be simultaneously inserted into the gap in the height direction.

[0009] In one embodiment, the auxiliary tool includes an insertion section and a gripping section. In the thickness direction of the auxiliary tool, the vertical cross-section of the insertion section includes two oppositely arranged straight segments that gradually approach each other in the direction away from the gripping section.

[0010] In one embodiment, the cross-sectional shape of the insertion segment is configured as an elongated strip.

[0011] In one embodiment, the gripping segment is configured with a circular cross-sectional shape.

[0012] In one embodiment, the cross-sectional area of ​​the gripping segment is larger than the cross-sectional area of ​​the insertion segment.

[0013] In one embodiment, the grip section is provided with an anti-slip structure.

[0014] In one embodiment, the anti-slip structure includes a plurality of anti-slip strips arranged around the grip section.

[0015] In one embodiment, the presser foot plate includes a first plate segment and a second plate segment arranged sequentially along the fabric feeding direction. The extending direction of the first plate segment intersects with the extending direction of the second plate segment, so that a presser foot gap for fabric feeding is formed between the first plate segment and the sewing plate. The needle groove extends from the first plate segment to the second plate segment.

[0016] The technical solution of this utility model involves inserting an auxiliary tool into the gap between the presser foot handle and the presser plate. When the presser foot contacts the sewing board, its rear end warps, with only the front end contacting the sewing board to hold the fabric on it. This reduces the friction between the fabric and the pusher gear at the rear end of the presser foot, decreasing the fabric's feed speed and causing the fabric to accumulate at the front end of the presser foot, naturally forming pleats within the needle groove. Therefore, when the sewing needle passes through the needle groove, it can sew the pleated fabric, creating a gathered effect. The auxiliary tool is positioned to the side of the needle groove to prevent it from obstructing the sewing needle's movement.

[0017] In summary, when sewing fabric flat, remove the auxiliary tool from the presser foot to evenly press the presser foot plate against the sewing board, ensuring uniform pressure on the fabric between them. The fabric pusher gear then pushes the fabric under the presser foot plate at a consistent speed. When a gathered effect is desired, insert the auxiliary tool into the gap in the presser foot, causing the rear end of the presser foot to lift, allowing the gathered effect to be sewn onto the fabric. This process eliminates the need to replace the presser foot with a gathering presser foot, effectively improving garment sewing efficiency. Furthermore, it effectively prevents thread misalignment that can occur when changing sewing techniques, especially for users unfamiliar with sewing equipment. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of a structure of an embodiment of the presser foot assembly provided by the present invention, wherein the auxiliary tool is an embodiment without an anti-slip structure;

[0020] Figure 2 A schematic diagram of an embodiment in which the auxiliary tool of the presser foot assembly provided by this utility model has an anti-slip structure;

[0021] Figure 3 for Figure 2 A partial cross-sectional view of the embodiment shown.

[0022] Explanation of icon numbers:

[0023] 100. Flat presser foot; 11. Presser foot handle; 111. Clearance; 12. Presser foot plate; 121. Needle groove; 122. First plate section; 123. Second plate section; 124. Presser foot clearance;

[0024] 200. Auxiliary tool; 21. Insertion section; 211. Straight section; 22. Grip section; 221. Anti-slip structure; 222. Anti-slip strip;

[0025] 300. Sewing device; 31. Sewing needle; 32. Sewing board; 321. Fabric pusher gear.

[0026] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0028] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0029] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0030] This utility model proposes a presser foot assembly.

[0031] Please see Figures 1 to 3 In one embodiment of this utility model, the presser foot assembly is used in a sewing device 300, which includes a sewing needle 31 and a sewing plate 32 for placing fabric. A fabric pushing gear 321 is provided on the sewing plate 32 corresponding to the presser foot. The presser foot assembly includes:

[0032] The flat presser foot 100 includes a presser foot handle 11 and a presser foot plate 12. The bottom of the presser foot handle 11 is hinged to the presser foot plate 12, and there is a gap 111 between the bottom of the presser foot handle 11 and the presser foot plate 12. The presser foot plate 12 is provided with a needle groove 121 for the sewing needle 31 to pass through. In the fabric feeding direction, the needle groove 121 is located on the front side of the presser foot handle 11.

[0033] The auxiliary tool 200 can be inserted into the gap 111 in the fabric feeding direction, causing the presser foot plate 12 to rotate relative to the presser foot handle 11, and on the sewing plate 32, to move the rear end of the presser foot plate 12 away from the sewing plate 32, and the auxiliary tool 200 is located to the side of the needle groove 121.

[0034] The technical solution of this utility model involves inserting an auxiliary tool 200 into the gap 111 between the presser foot handle 11 and the presser plate. When the presser foot 12 contacts the sewing plate 32, the rear end of the presser foot 12 warps, with only the front end contacting the sewing plate 32 to hold the fabric on the sewing plate 32. This reduces the friction between the fabric and the fabric pusher gear 321 at the rear end of the presser foot 12, decreasing the fabric conveying speed of the pusher gear 321. This causes the fabric to accumulate at the front end of the presser foot 12, naturally forming pleats within the needle groove 121. Therefore, when the sewing needle 31 passes through the needle groove 121, it can sew the pleated fabric, creating a gathered effect. The auxiliary tool 200 is positioned laterally within the needle groove 121 to prevent it from obstructing the sewing of the sewing needle 31.

[0035] In summary, when the fabric needs to be sewn flat, the auxiliary tool 200 is removed from the presser foot 100 to evenly press the presser foot plate 12 of the presser foot 100 against the sewing plate 32. The fabric experiences uniform pressure between the presser foot plate 12 and the sewing plate 32, and the pusher gear 321 pushes the fabric under the presser foot plate 12 at a uniform speed. When a gathered effect is needed, the auxiliary tool 200 is inserted into the gap 111 on the presser foot 100, causing the rear end of the presser foot 100 to lift up, allowing a gathered effect to be sewn onto the fabric. During this process, there is no need to replace the presser foot 100 with a gathering presser foot, effectively improving the sewing efficiency of the garment. Furthermore, it effectively avoids stitch deviation that may occur when changing sewing techniques, especially for users unfamiliar with sewing equipment.

[0036] It should be noted that the directional terms such as "front" and "back" appearing in this application are based on the direction of fabric feeding.

[0037] In one embodiment, the presser foot 12 includes a first segment 122 and a second segment 123 arranged sequentially along the fabric feeding direction. The extending direction of the first segment 122 intersects the extending direction of the second segment 123, forming a presser foot gap 124111 between the first segment 122 and the sewing plate 32 for fabric feeding. The needle groove extends from the first segment 122 to the second segment 123. This design allows the fabric to smoothly pass through the presser foot gap 124111 into the space between the presser foot 12 and the sewing plate 32, where it is pushed by the fabric pusher gear 321 on the sewing plate 32, thereby driving the remaining fabric into the space between the presser foot 12 and the sewing plate 32, so that it can be sewn by the sewing needle 31 within the needle groove 121. In other embodiments, the extending directions of the first segment 122 and the second segment 123 may be the same.

[0038] In one embodiment, multiple auxiliary tools 200 are provided, and these multiple auxiliary tools 200 can be simultaneously inserted into the gap 111. The auxiliary tools 200 can simultaneously adjust the angle of the presser foot plate 12 at different positions along the width direction of the presser foot to maintain the rear end of the presser foot plate 12 away from the sewing plate 32. Furthermore, the auxiliary tools 200 can also be simultaneously inserted into the gap 111 along the height direction to increase the distance between the rear end of the presser foot plate 12 and the support of the sewing plate 32, that is, to increase the warping degree of the presser foot plate 12, so as to accommodate fabrics of different thicknesses. In other words, this presser foot assembly can sew a gathered effect on thicker fabrics. When a gathered effect is needed on thinner fabrics (such as chiffon, tulle, etc.), inserting one auxiliary tool 200 is sufficient. In other embodiments, there may be only one auxiliary tool 200.

[0039] In one embodiment, the auxiliary tool 200 includes an insertion section 21 and a gripping section 22. In the thickness direction of the auxiliary tool 200, the vertical cross-section of the insertion section 21 includes two opposing straight segments 211 that gradually approach each other in the direction away from the gripping section 22. This wedge-shaped design facilitates insertion and allows adjustment of the lifting height of the presser foot plate 12 according to the insertion depth. In other embodiments, the vertical cross-section of the insertion section 21 may not include the straight segments 211 that gradually approach each other in the direction away from the gripping section 22. The auxiliary tool 200 is available in various sizes, with different cross-sectional areas of the insertion section 21, so that the rear end of the presser foot plate 12 of the flat presser foot 100 is at different heights from the sewing plate 32.

[0040] In one embodiment, the cross-sectional shape of the insertion segment 21 is configured as an elongated strip. When the auxiliary tool 200 is inserted into the gap 111, the contact area between the insertion segment 21 and the pressure foot plate 12 is increased, providing more stable support and avoiding instability caused by insufficient contact area during use. In other embodiments, the cross-sectional shape can also be configured as a circle, that is, the auxiliary tool 200 is needle-shaped.

[0041] In one embodiment, the gripping section 22 has a circular cross-sectional shape. That is, the gripping section 22 has a cylindrical structure, allowing the operator to easily grip and rotate the auxiliary tool 200, facilitating the adjustment of the position of the auxiliary tool 200 at the flat angle. In other embodiments, the gripping section 22 may also have a square, elliptical, or irregular cross-sectional shape.

[0042] In one embodiment, the cross-sectional area of ​​the gripping segment 22 is larger than the cross-sectional area of ​​the insertion segment 21. This provides the user with a larger gripping area, making operation more comfortable and stable. Furthermore, the increased area of ​​the gripping segment 22 helps limit the insertion depth of the auxiliary tool 200, preventing it from being inserted too deeply. In other embodiments, the cross-sectional area of ​​the gripping segment 22 may be equal to the maximum cross-sectional area of ​​the insertion segment 21.

[0043] In one embodiment, the grip section 22 is provided with an anti-slip structure 221. This increases the friction on the surface of the grip section 22, allowing the auxiliary tool 200 to be inserted into the gap 111 of the presser foot 100 even when hands are sweaty or have a small amount of sewing oil on them, thus preventing operational errors. Further, the anti-slip structure 221 includes multiple anti-slip strips 222, which are arranged around the grip section 22. The anti-slip strips 222 increase the friction between the fingers and the grip section 22. In other embodiments, the anti-slip structure 221 may not be provided; alternatively, the anti-slip structure 221 may include a frosted texture.

[0044] The above description is merely an exemplary embodiment of the present utility model and does not limit the scope of protection of the present utility model. Any equivalent structural transformations made based on the technical concept of the present utility model and the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the scope of protection of the present utility model.

Claims

1. A presser foot assembly for a sewing device, the sewing device comprising a sewing needle and a sewing plate for holding fabric, wherein a fabric pushing gear is provided on the sewing plate corresponding to the presser foot, characterized in that, The presser foot assembly includes: A flat presser foot includes a presser foot handle and a presser foot plate. The bottom of the presser foot handle is hinged to the presser foot plate, and there is a gap between the bottom of the presser foot handle and the presser foot plate. The presser foot plate is provided with a needle groove for the sewing needle to pass through. In the fabric feeding direction, the needle groove is located on the front side of the presser foot handle. An auxiliary tool is inserted into the gap in the fabric feeding direction to rotate the presser foot relative to the presser foot handle on the sewing board, so that the rear end of the presser foot is away from the sewing board, and the auxiliary tool is located to the side of the needle groove.

2. The presser foot assembly as described in claim 1, characterized in that, The auxiliary tools are provided in multiple quantities, and multiple auxiliary tools can be inserted into the gap simultaneously.

3. The presser foot assembly as described in claim 2, characterized in that, Multiple of the aforementioned auxiliary tools can be simultaneously inserted into the gap in the height direction.

4. The presser foot assembly as described in claim 1, characterized in that, The auxiliary tool includes an insertion section and a gripping section. In the thickness direction of the auxiliary tool, the vertical cross-section of the insertion section includes two oppositely arranged straight segments that gradually approach each other in the direction away from the gripping section.

5. The presser foot assembly as described in claim 4, characterized in that, The cross-sectional shape of the insertion segment is configured as an elongated strip.

6. The presser foot assembly as described in claim 4, characterized in that, The gripping section has a circular cross-sectional shape.

7. The presser foot assembly as described in claim 4, characterized in that, The cross-sectional area of ​​the holding section is larger than the cross-sectional area of ​​the insertion section.

8. The presser foot assembly as described in claim 4, characterized in that, The grip section is equipped with an anti-slip structure.

9. The presser foot assembly as described in claim 8, characterized in that, The anti-slip structure includes multiple anti-slip strips, which are arranged around the grip section.

10. The presser foot assembly as claimed in claim 1, characterized in that, The presser foot plate includes a first plate segment and a second plate segment arranged sequentially along the fabric feeding direction. The extension direction of the first plate segment intersects with the extension direction of the second plate segment, so that a presser foot gap for fabric feeding is formed between the first plate segment and the sewing plate. The needle groove extends from the first plate segment to the second plate segment.

Images