Presser foot structure and sewing machine

Abstract

The utility model belongs to the field of sewing machine equipment, and particularly relates to a presser foot structure which is used for straightening cloth and comprises a supporting frame, a first push plate, a second push plate and a torsion spring, the two ends of the supporting frame are respectively provided with connecting parts which are symmetrically arranged, and the first push plate and the second push plate are arranged in a crossed mode, can rotate and move and are connected with the connecting parts. And the first push plate and the second push plate are enclosed to form a through communication port. The torsional spring comprises a torsional spring body, the torsional spring body is arranged on the connecting part, and the driving end of the torsional spring body is connected with the first push plate and the second push plate, so that the first push plate and the second push plate are automatically reset after rotating by an angle. By dynamically adjusting the angle of the push plate, the problems of wrinkling and gathering of the elastic cloth are effectively solved, and sewing lines are smoother and more uniform.

Description

Technical Field

[0001] This utility model belongs to the field of sewing machine equipment, and in particular relates to a presser foot structure. Background Technology

[0002] In the sewing machine industry, especially when handling elastic fabrics (such as Lycra and spandex), the fabric often tends to bunch, wrinkle, or clump together due to its elasticity. This not only affects sewing accuracy but can also lead to uneven stitches and fabric tearing. Traditional sewing machine presser feet are mostly fixed designs, which cannot effectively handle the dynamic changes of elastic fabrics. Therefore, operators need to frequently manually straighten the fabric during sewing, greatly reducing work efficiency and increasing operational difficulty. Summary of the Invention

[0003] The purpose of this invention is to provide a presser foot structure that solves the problem of fabric wrinkles making sewing inconvenient.

[0004] To achieve the above objectives, this utility model provides a presser foot structure for straightening fabric, comprising a support frame, a first push plate, a second push plate, and a torsion spring. The support frame has symmetrically arranged connecting portions at both ends. The first and second push plates are cross-shaped and rotatable, and both are connected to the connecting portions, forming a through-hole between them. The torsion spring includes a torsion spring body disposed on the connecting portion. The driving end of the torsion spring body is connected to both the first and second push plates, allowing the first and second push plates to automatically reset after rotating an angle.

[0005] Furthermore, the torsion spring also includes a first drive arm and a second drive arm extending from the torsion spring body. The torsion spring body located at one end of the support frame is disposed on the connecting part, the first drive arm is connected to the support frame, and the second drive arm is connected to the first push plate; the torsion spring body located at the other end of the support frame is disposed on another connecting part, the first drive arm is connected to the support frame, and the second drive arm is connected to the second push plate; so that the first push plate and the second push plate automatically reset after rotating by an angle.

[0006] Furthermore, the first push plate extends forward to form a first abutting end for abutting against the support frame, and the second push plate extends forward to form a second abutting end for abutting against the support frame.

[0007] Furthermore, the front end of the support frame is provided with a first limiting end for limiting the rotation of the first push plate, and the rear end of the support frame is provided with a second limiting end for limiting the rotation of the second push plate.

[0008] Furthermore, the included angle between the first push plate and the second push plate is between 90° and 180°.

[0009] Furthermore, the connecting part is provided with a hollow groove, and the first push plate and the second push plate extend out a first hollow ring and a second hollow ring respectively. The first hollow ring and the second hollow ring are movably connected in the hollow groove through a rotating shaft.

[0010] Furthermore, the torsion spring body is sleeved on the rotating shaft.

[0011] Furthermore, the first push plate and the second push plate are provided with several parallel strip grooves for contacting the fabric.

[0012] Furthermore, a sewing machine is also provided, which also includes the presser foot structure described above.

[0013] The presser foot structure provided in this utility model embodiment has at least the following technical effects:

[0014] In this design, the fabric is placed on the table. Initially, the two push plates are held in a contracted state with their angle pointing downwards by the force of the torsion spring. The sewing machine's connecting support frame drives downwards. After the two push plates contact the fabric, the reaction force from the table overcomes the elastic force of the torsion spring, causing the two push plates to gradually conform to the table surface, with their outermost ends moving outwards. The friction between the push plates and the fabric is sufficient to smooth and spread the fabric out. The sewing machine's needle moves repeatedly through the connecting port. After completion, the torsion spring releases its energy, pushing the two push plates back to their original position. By dynamically adjusting the push plate angle, the problems of wrinkles and gathering in elastic fabric are effectively solved, resulting in smoother and more uniform sewing lines. Automated adjustment reduces the frequency of manual fabric adjustments by the operator, speeds up sewing, and reduces labor intensity. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model, 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 these drawings without creative effort.

[0016] Figure 1 The structure of the presser foot provided in the embodiment of this utility model Figure 1 .

[0017] Figure 2 The structure of the presser foot provided in the embodiment of this utility model Figure 2 .

[0018] Figure 3 This is an anatomical diagram of the presser foot structure provided in an embodiment of the present utility model.

[0019] Explanation of main reference numerals: 100, support frame; 110, connecting part; 120, first abutting end; 130, second abutting end; 140, first limiting end; 150, second limiting end; 160, hollow groove; 170, first hollow ring; 180, second hollow ring; 190, communicating port; 191, rotating shaft;

[0020] 200. First push plate; 210. Second push plate; 220. Strip groove;

[0021] 300, Torsion spring; 310, Torsion spring body; 320, First drive arm; 330, Second drive arm. Detailed Implementation

[0022] The embodiments of this utility model are described in detail below, with examples of the embodiments shown in the appendix. Figures 1-3 As shown in the figure, the same or similar reference numerals throughout denote the same or similar elements or elements having the same or similar functions. The following is illustrated with reference to the appendix. Figures 1-3 The described embodiments are exemplary and intended to explain embodiments of the present invention, and should not be construed as limiting the present invention.

[0023] In the description of the embodiments of this utility model, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing the embodiments of 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.

[0024] 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 indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of embodiments of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0025] In this embodiment of the invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this embodiment of the invention according to the specific circumstances.

[0026] In this embodiment of the utility model, a presser foot structure is provided for straightening fabric. It includes a support frame 100, a first push plate 200, a second push plate 210, and a torsion spring 300. The support frame 100 has symmetrically arranged connecting portions 110 at both ends. The first push plate 200 and the second push plate 210 are cross-shaped and rotatable, and both are connected to the connecting portions 110. The first push plate 200 and the second push plate 210 form a through-hole 190. The torsion spring 300 includes a torsion spring body 310, which is disposed on the connecting portion 110. The driving end of the torsion spring body 310 is connected to both the first push plate 200 and the second push plate 210, so that the first push plate 200 and the second push plate 210 automatically reset after rotating an angle.

[0027] Specifically, the fabric is placed on the table. Initially, the two push plates are held in a contracted state with their angle pointing downwards by the force of the torsion spring 300. The sewing machine connecting support frame 100 is driven downwards. After the two push plates contact the fabric, they are subjected to a reaction force from the table to overcome the elastic force of the torsion spring 300, causing the angle between the two push plates to widen, gradually conforming to the table surface. The outermost ends of the two push plates move outwards, and the friction between the push plates and the fabric is sufficient to flatten the fabric. The sewing machine needle moves repeatedly in the connecting port 190. After completion, the torsion spring 300 releases energy, pushing the two push plates back to their original position. By dynamically adjusting the push plate angle, the problem of wrinkles and gathering in elastic fabric is effectively solved, resulting in smoother and more uniform sewing lines. Automated adjustment reduces the frequency of manual fabric adjustments by the operator, speeds up sewing, and reduces labor intensity.

[0028] In another embodiment of the utility model, the torsion spring 300 further includes a first drive arm 320 and a second drive arm 330 extending from the torsion spring body 310. The torsion spring body 310 located at one end of the support frame 100 is disposed on the connecting portion 110, the first drive arm 320 is connected to the support frame 100, and the second drive arm 330 is connected to the first push plate 200. The torsion spring body 310 located at the other end of the support frame 100 is disposed on another connecting portion 110, the first drive arm 320 is connected to the support frame 100, and the second drive arm 330 is connected to the second push plate 210; so that the first push plate 200 and the second push plate 210 automatically reset after rotating an angle. Specifically, the torsion spring body 310 located at one end of the support frame 100 is disposed on a connecting portion 110, and its first drive arm 320 is fixedly connected to the support frame 100. Similarly, the torsion spring body 310 located at the other end of the support frame 100 is also mounted on another connecting part 110, and its first drive arm 320 is also fixedly connected to the support frame 100. This connection method of the two torsion springs ensures the stability of the torsion spring 300 on the support frame 100 and provides reliable support for the rotation of the push plate. At one end of the support frame 100, the second drive arm 330 of the torsion spring 300 is connected to the first push plate 200; at the other end of the support frame 100, the second drive arm 330 of the torsion spring 300 is connected to the second push plate 210. This connection method allows the torsion spring 300 to generate a corresponding torque when the push plate is rotated by an external force, thereby automatically resetting the push plate after the external force disappears.

[0029] In another embodiment of the utility model, the first push plate 200 extends forward to form a first abutting end 120 for abutting against the support frame 100, and the second push plate 210 extends forward to form a second abutting end 130 for abutting against the support frame 100. The front end of the support frame 100 is provided with a first limiting end 140 for limiting the rotation of the first push plate 200, and the rear end of the support frame 100 is provided with a second limiting end 150 for limiting the rotation of the second push plate 210. The included angle between the first push plate 200 and the second push plate 210 is between 90° and 180°. Specifically, the abutting relationship between the extended portion of the push plate and the support frame 100, along with the limiting end provided on the support frame 100, together constitute an effective restriction on the rotation of the push plate. This design enhances the stability of the presser foot structure, allowing the push plate to remain within a predetermined range during rotation, avoiding structural damage or improper fabric handling caused by excessive rotation.

[0030] In another embodiment of the utility model, the connecting portion 110 is provided with a hollow groove 160. The first push plate 200 and the second push plate 210 respectively extend into a first hollow ring 170 and a second hollow ring 180. The first hollow ring 170 and the second hollow ring 180 are movably connected within the hollow groove 160 via a rotating shaft 191. The torsion spring body 310 is sleeved on the rotating shaft 191. Specifically, the hollow ring is designed to cooperate with the rotating shaft 191 to realize the rotation function of the push plate. The inner diameter of the hollow ring needs to match the outer diameter of the rotating shaft 191 to ensure that they can fit tightly and rotate smoothly.

[0031] In another embodiment of the invention, the first push plate 200 and the second push plate 210 are provided with a plurality of parallel strip grooves 220 for contacting the fabric. Specifically, by designing the strip grooves 220, the contact area and friction between the push plate and the fabric are increased. This design allows the push plate to more effectively spread and fix the fabric, especially when handling elastic fabrics, reducing fabric aggregation and wrinkling.

[0032] In another embodiment of the utility model, the torsion spring body 310 is disposed on the rotating shaft 191, and the first drive arm 320 abuts against the upper end of the first push plate 200, and the second drive arm 330 abuts against the upper end of the second push plate 210. After the two push plates come into contact with the fabric, they are subjected to a reaction force from the tabletop to overcome the elastic force of the torsion spring 300, causing the included angle of the two push plates to widen, gradually conforming to the tabletop, and the outermost ends of the two push plates move outward. The friction between the push plates and the fabric is sufficient to flatten the fabric, thus producing the same effect.

[0033] In another embodiment of the invention, a sewing machine is also provided, which further includes the presser foot structure described above.

[0034] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A presser foot structure for straightening fabric, characterized in that, include The support frame has symmetrically arranged connecting parts at both ends. The first push plate and the second push plate are arranged crosswise and can be rotated, and are both connected to the connecting part; the first push plate and the second push plate form a through-hole; A torsion spring includes a torsion spring body disposed on the connecting portion. The driving end of the torsion spring body is connected to the first push plate and the second push plate respectively, so that the first push plate and the second push plate automatically reset after rotating by an angle.

2. The presser foot structure according to claim 1, characterized in that, The torsion spring also includes a first drive arm and a second drive arm extending from the torsion spring body. The torsion spring body located at one end of the support frame is disposed on the connecting part. The first drive arm is connected to the support frame, and the second drive arm is connected to the first push plate. The torsion spring body located at the other end of the support frame is disposed on another connecting part. The first drive arm is connected to the support frame, and the second drive arm is connected to the second push plate, so that the first push plate and the second push plate automatically reset after rotating by an angle.

3. The presser foot structure according to claim 1, characterized in that, The first push plate extends forward to form a first abutting end for abutting against the support frame, and the second push plate extends forward to form a second abutting end for abutting against the support frame.

4. The presser foot structure according to claim 3, characterized in that, The front end of the support frame is provided with a first limiting end for limiting the rotation of the first push plate, and the rear end of the support frame is provided with a second limiting end for limiting the rotation of the second push plate.

5. The presser foot structure according to any one of claims 3 to 4, characterized in that, The included angle between the first push plate and the second push plate is between 90° and 180°.

6. The presser foot structure according to claim 1, characterized in that, The connecting part includes a hollow groove, and the first push plate and the second push plate respectively extend into a first hollow ring and a second hollow ring. The first hollow ring and the second hollow ring are movably connected in the hollow groove through a rotating shaft.

7. The presser foot structure according to claim 6, characterized in that, The torsion spring body is sleeved on the rotating shaft.

8. The presser foot structure according to any one of claims 1 to 4 and 6 to 7, characterized in that, The first push plate and the second push plate are provided with several parallel strip grooves for contacting the fabric.

9. A sewing machine, characterized in that, It also includes the presser foot structure described in any one of items 1 to 8.

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