Presser foot assembly and overlock machine
By designing a presser foot assembly that tilts upwards vertically and swings at a large angle in the initial state, the problem of insufficient presser foot swing angle when sewing sequined fabrics in existing overlock sewing machines is solved, enabling smooth sewing of thicker fabrics.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ZHEJIANG JACK SMART SEWING TECHNOLOGY CO LTD
- Filing Date
- 2025-04-16
- Publication Date
- 2026-05-26
AI Technical Summary
When sewing sequined fabric, existing overlock sewing machines have insufficient oscillation angle of the presser foot, causing thicker fabric to accumulate at the presser foot, making the needle prone to breakage.
Design a presser foot assembly where the presser foot plate is tilted upwards and vertically positioned in the initial state, and swings up and down at a large angle around the head of the presser foot frame, increasing the swing angle of the presser foot plate to accommodate thicker fabrics.
It allows sequined fabric to pass smoothly through the presser foot, avoiding accumulation and preventing needle breakage, and is suitable for sewing sequined fabrics with thicker stems.
Smart Images
Figure CN224280705U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of sewing machine technology, and in particular to a presser foot assembly and an overlock sewing machine. Background Technology
[0002] An overlock sewing machine is a sewing device used to treat the edges of fabric. It is mainly used to prevent the fabric edges from coming loose, and at the same time completes cutting, sewing and binding. It is widely used in clothing, home textiles and other fields.
[0003] Currently, in existing overlock sewing machines, the presser foot is horizontal and is held in place by a presser foot bracket. When the fabric being sewn passes under the presser foot, the presser foot swings up and down around the bracket due to the action and reaction forces of the fabric. When the overlock machine is used specifically for sewing sequined fabrics, the needle plate is tilted upwards, causing the presser foot to tilt upwards as well. Since the overall angle of the presser foot's upward and downward swing under the action of the presser foot bracket is a fixed value, the presser foot will also swing upwards in the initial state. As a result, when the sequined fabric passes between the presser foot and the needle plate, the upward swing angle of the presser foot is smaller due to the pushing force of the sequined fabric. This can cause the sequined fabric to accumulate under the presser foot, especially when facing thicker sections, leading to needle breakage. Utility Model Content
[0004] In view of this, it is necessary to provide a presser foot assembly and an overlock sewing machine capable of sewing sequined fabrics with thicker stems.
[0005] To solve the above-mentioned technical problems, this application provides the following technical solution:
[0006] A presser foot assembly, the presser foot assembly comprising:
[0007] Presser foot bracket, with a presser foot bracket head;
[0008] The presser foot plate rests against the head of the presser foot frame, and the presser foot plate can swing up and down around the head of the presser foot frame;
[0009] The presser foot plate has an initial state and a working state. When the presser foot plate is in the initial state, the presser foot plate is tilted upwards, and the head of the presser foot frame is perpendicular to the presser foot plate. When the presser foot plate is in the working state, the presser foot plate swings upwards or downwards around the head of the presser foot frame.
[0010] Understandably, because the presser foot head is set perpendicular to the presser foot plate which is tilted upward in the initial state, the presser foot plate in the presser foot assembly can swing upward at a larger angle. In this way, when the presser foot plate encounters sequined fabric with a thicker stem, the sequined fabric can pass smoothly under the presser foot plate, preventing the thicker sequined fabric from accumulating at the presser foot plate. This makes the overlock sewing machine with this presser foot assembly suitable for overlock sequined fabric with a thicker stem.
[0011] In one embodiment, the presser foot bracket further comprises a presser foot bracket body, wherein the presser foot bracket head is disposed on the presser foot bracket body and connected to the presser foot bracket body;
[0012] The presser foot plate is provided with an arc-shaped concave surface, which is attached to the head of the presser foot frame, and the presser foot plate can swing up and down around the head of the presser foot frame through the arc-shaped concave surface.
[0013] When the presser foot plate is in the initial state, the extension direction of the presser foot bracket head towards the presser foot bracket body is perpendicular to the plane direction of the part of the presser foot plate where the arc-shaped concave surface is located.
[0014] In one embodiment, the presser foot bracket further comprises a presser foot bracket body, wherein the presser foot bracket head is disposed at one end of the presser foot bracket body and connected to the presser foot bracket body;
[0015] The extension direction of the presser foot head toward the presser foot body forms an angle A with the horizontal direction; when the presser foot is in the initial state, the tilt angle of the presser foot when it is tilted upward is set to B, where A+B=90°.
[0016] In one embodiment, the maximum swing angle of the presser foot plate when it swings upward around the head of the presser foot frame is equal to the maximum swing angle of the presser foot plate when it swings downward around the head of the presser foot frame.
[0017] It is understandable that, since the maximum swing angle of the presser foot plate when it swings upward and downward around the head of the presser foot frame is equal, the swing angle of the presser foot plate when it swings upward or downward is half of the overall angle when it swings up and down. This can further increase the range of thickness of the sequined fabric that the presser foot plate can support.
[0018] In one embodiment, the presser foot bracket further comprises a presser foot bracket body, wherein the presser foot bracket head is disposed at one end of the presser foot bracket body and connected to the presser foot bracket body;
[0019] The head of the presser foot bracket is connected to the body of the presser foot bracket by a circular arc transition.
[0020] In one embodiment, the presser foot assembly further includes a presser foot claw and a spring plate, wherein the spring plate and the presser foot claw are stacked sequentially on the presser foot plate and respectively abut against and limit the presser foot plate;
[0021] The portion of the spring sheet away from the presser foot claw abuts against the head of the presser foot bracket, thereby limiting the head of the presser foot bracket to the presser foot plate.
[0022] In one embodiment, the presser foot head has an arcuate convex surface, and the presser foot head abuts against and limits the spring sheet through the arcuate convex surface.
[0023] In one embodiment, the head of the presser foot bracket has a groove that can be inserted and engaged with the spring plate, thereby limiting the spring plate to the head of the presser foot bracket in the width direction X of the presser foot plate.
[0024] In one embodiment, the presser foot assembly further includes a cylindrical head screw, which passes through the spring plate and the presser foot claw in sequence and is screwed to the presser foot plate to fix the spring plate and the presser foot claw to the presser foot plate.
[0025] This application also claims protection for an overlock sewing machine, including the presser foot assembly described above.
[0026] Due to the application of the above solution, this application has the following advantages compared with the prior art:
[0027] The presser foot assembly and overlock sewing machine claimed in this application are designed so that the presser foot head is set perpendicularly to the presser foot plate which is tilted upward in the initial state. This allows the presser foot plate in the presser foot assembly to swing upward at a larger angle. In this way, when the presser foot plate encounters sequined fabric with a thicker stem, the sequined fabric can pass smoothly under the presser foot plate, preventing the thicker sequined fabric from accumulating at the presser foot plate. This makes the overlock sewing machine using this presser foot assembly suitable for overlock sequined fabric with a thicker stem. Attached Figure Description
[0028] To more clearly illustrate the technical solutions in the embodiments of this application or the conventional technology, the drawings used in the description of the embodiments or the conventional technology will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0029] Figure 1 This is a schematic diagram of the presser foot assembly provided in an embodiment of this application.
[0030] Figure 2This is a schematic diagram showing the connection between the presser foot plate and the presser foot bracket provided in an embodiment of this application.
[0031] Figure 3 This is a structural schematic diagram of the presser foot assembly provided in one embodiment of this application from another perspective.
[0032] Reference numerals: 100, presser foot assembly; 10, presser foot bracket; 11, presser foot bracket head; 111, arc-shaped convex surface; 112, groove; 12, presser foot bracket body; 20, presser foot plate; 21, arc-shaped concave surface; 22, front end; 23, rear end; 30, presser foot claw; 40, spring plate; 50, cylindrical head screw; 60, pin plate. Detailed Implementation
[0033] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.
[0034] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on the other component or there may be an intermediate component. When a component is considered to be "connected to" another component, it can be directly connected to the other component or there may be an intermediate component present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application's specification are for illustrative purposes only and do not represent the only possible implementation.
[0035] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.
[0036] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature and the second feature are in indirect contact through an intermediate medium. Furthermore, "above," "over," and "on top" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.
[0037] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and / or" as used in this application includes any and all combinations of one or more of the associated listed items.
[0038] The presser foot assembly 100 claimed in this application is used in an overlock sewing machine (not shown) for sewing sequined fabric. Here, the needle plate 60 of the overlock sewing machine is tilted upwards in the initial state.
[0039] like Figures 1 to 3 As shown, an embodiment of this application provides a presser foot assembly 100, which includes a presser foot frame 10 and a presser foot plate 20. The presser foot frame 10 has a presser foot frame head 11. The presser foot plate 20 abuts against the presser foot frame head 11 and can swing up and down around the presser foot frame head 11. The presser foot plate 20 has a starting state and a working state. When the presser foot plate 20 is in the starting state, the presser foot plate 20 is tilted upward and the presser foot frame head 11 is perpendicular to the presser foot plate 20. When the presser foot plate 20 is in the working state, the presser foot plate 20 swings up or down around the presser foot frame head 11. Here, the initial state of the presser foot 20 specifically refers to the time when the presser foot 20 is not working, that is, when the sequined fabric has not entered between the presser foot 20 and the needle plate 60; the presser foot 20 is tilted upward, specifically, the front end 22 of the presser foot 20 is above the rear end 23 of the presser foot 20; and the presser foot 20 swings upward, specifically, the presser foot 20 swings with the front end 22 upward and the rear end 23 downward; the presser foot 20 swings downward, specifically, the presser foot 20 swings with the front end 22 downward and the rear end 23 upward.
[0040] As can be seen from the above, since the presser foot head 11 is set perpendicular to the presser foot plate 20 which is tilted upward in the initial state, the presser foot plate 20 in the presser foot assembly 100 can swing upward at a larger angle. In this way, when the presser foot plate 20 encounters sequined fabric with a thicker stem, the sequined fabric can pass smoothly under the presser foot plate 20, so as to prevent the sequined fabric with a thicker stem from accumulating at the presser foot plate 20. This makes the overlock sewing machine with the presser foot assembly 100 suitable for overlock sequined fabric with a thicker stem.
[0041] like Figure 1 , Figure 2 As shown, in one embodiment, the presser foot holder 10 further includes a presser foot holder body 12, a presser foot holder head 11 disposed on the presser foot holder body 12 and connected to the presser foot holder body 12; the presser foot plate 20 is provided with an arc-shaped concave surface 21, the arc-shaped concave surface 21 abuts against the presser foot holder head 11, and the presser foot plate 20 can swing up and down around the presser foot holder head 11 through the arc-shaped concave surface 21; when the presser foot plate 20 is in the initial state, the extension direction of the presser foot holder head 11 toward the presser foot holder body 12 is perpendicular to the plane direction of the part of the presser foot plate 20 where the arc-shaped concave surface 21 is located.
[0042] like Figure 1 , Figure 2 As shown, in one embodiment, the extension direction of the presser foot head 11 toward the presser foot body 12 forms an angle A with the horizontal direction; when the presser foot plate 20 is in the initial state, the tilt angle of the presser foot plate 20 when it is tilted upward is set to B, where A+B=90°.
[0043] like Figure 1 , Figure 2 As shown, in one embodiment, the presser foot head 11 is connected to the presser foot body 12 by an arc transition.
[0044] like Figure 1 , Figure 2 As shown, in one embodiment, the maximum swing angle of the presser foot 20 when it swings upward around the presser foot head 11 is equal to the maximum swing angle of the presser foot 20 when it swings downward around the presser foot head 11. That is, since the maximum swing angles of the presser foot 20 when it swings upward and downward around the presser foot head 11 are equal, the swing angle of the presser foot 20 when it swings upward or downward is half of the overall angle of the presser foot 20 when it swings up and down. This can further increase the range of sequin fabric thickness that the presser foot 20 can support.
[0045] like Figure 3As shown, in one embodiment, the presser foot assembly 100 further includes a presser foot claw 30 and a spring plate 40. The spring plate 40 and the presser foot claw 30 are stacked on the presser foot plate 20 in sequence and respectively abut against and limit the presser foot plate 20. The portion of the spring plate 40 away from the presser foot claw 30 abuts against the presser foot head 11 to limit the presser foot head 11 to the presser foot plate 20.
[0046] like Figure 3 As shown, in one embodiment, the presser foot head 11 has an arcuate convex surface 111, and the presser foot head 11 abuts against the spring sheet 40 through the arcuate convex surface 111.
[0047] like Figure 3 As shown, in one embodiment, the presser foot head 11 has a groove 112, which can be inserted and engaged with the spring plate 40, thereby limiting the spring plate 40 to the presser foot head 11 in the width direction X of the presser foot plate 20.
[0048] like Figure 3 As shown, in one embodiment, the presser foot assembly 100 further includes a cylindrical head screw 50, which passes through the spring plate 40 and the presser foot claw 30 in sequence and is screwed to the presser foot plate 20 to fix the spring plate 40 and the presser foot claw 30 to the presser foot plate 20.
[0049] This application also claims protection for an overlock sewing machine, including the presser foot assembly 100 described above.
[0050] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.
[0051] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the scope of protection of this application. Therefore, the patent protection scope of this application should be determined by the appended claims.
Claims
1. A presser foot assembly, characterized in that, The presser foot assembly (100) includes: A presser foot (10) having a presser foot head (11); The presser foot plate (20) rests against the head (11) of the presser foot frame, and the presser foot plate (20) can swing up and down around the head (11) of the presser foot frame. The presser foot plate (20) has an initial state and a working state. When the presser foot plate (20) is in the initial state, the presser foot plate (20) is tilted upwards, and the presser foot head (11) is perpendicular to the presser foot plate (20). When the presser foot plate (20) is in the working state, the presser foot plate (20) swings upwards or downwards around the presser foot head (11).
2. The presser foot assembly according to claim 1, characterized in that, The presser foot bracket (10) also has a presser foot bracket body (12), and the presser foot bracket head (11) is disposed on the presser foot bracket body (12) and connected to the presser foot bracket body (12); The presser foot plate (20) is provided with an arc-shaped concave surface (21), which is attached to the presser foot head (11), and the presser foot plate (20) can swing up and down around the presser foot head (11) through the arc-shaped concave surface (21). When the presser foot plate (20) is in the initial state, the extension direction of the presser foot head (11) towards the presser foot body (12) is perpendicular to the plane direction of the part of the presser foot plate (20) where the arc concave surface (21) is located.
3. The presser foot assembly according to claim 1, characterized in that, The presser foot bracket (10) also has a presser foot bracket body (12), and the presser foot bracket head (11) is disposed at one end of the presser foot bracket body (12) and connected to the presser foot bracket body (12); The extension direction of the presser foot head (11) towards the presser foot body (12) forms an angle A with the horizontal direction; when the presser foot plate (20) is in the initial state, the tilt angle of the presser foot plate (20) when it is tilted upward is set to B, where A+B=90°.
4. The presser foot assembly according to claim 1, characterized in that, The maximum swing angle of the presser foot plate (20) when it swings upward around the head (11) of the presser foot frame is equal to the maximum swing angle of the presser foot plate (20) when it swings downward around the head (11) of the presser foot frame.
5. The presser foot assembly according to claim 1, characterized in that, The presser foot bracket (10) also has a presser foot bracket body (12), and the presser foot bracket head (11) is disposed at one end of the presser foot bracket body (12) and connected to the presser foot bracket body (12); The head (11) of the presser foot bracket is connected to the body (12) of the presser foot bracket by a circular arc transition.
6. The presser foot assembly according to claim 1, characterized in that, The presser foot assembly (100) further includes a presser foot claw (30) and a spring plate (40), wherein the spring plate (40) and the presser foot claw (30) are stacked on the presser foot plate (20) in sequence and respectively abut against and limit the presser foot plate (20); The portion of the spring sheet (40) away from the presser foot claw (30) abuts against the presser foot head (11) to limit the presser foot head (11) to the presser foot plate (20).
7. The presser foot assembly according to claim 6, characterized in that, The presser foot head (11) has an arc-shaped convex surface (111), and the presser foot head (11) abuts against the spring sheet (40) through the arc-shaped convex surface (111).
8. The presser foot assembly according to claim 6, characterized in that, The head (11) of the presser foot bracket has a groove (112) that can be inserted into the spring plate (40) to limit the spring plate (40) to the head (11) of the presser foot bracket in the width direction X of the presser foot plate (20).
9. The presser foot assembly according to claim 6, characterized in that, The presser foot assembly (100) also includes a cylindrical head screw (50), which passes through the spring plate (40) and the presser foot claw (30) in sequence and is screwed to the presser foot plate (20) to fix the spring plate (40) and the presser foot claw (30) to the presser foot plate (20).
10. An overlock sewing machine, characterized in that, Includes the presser foot assembly (100) as described in any one of claims 1 to 9.