A sofa sewing presser foot mechanism with easily adjustable presser foot pressure

Abstract

This utility model discloses a sofa sewing presser foot mechanism that facilitates adjustment of presser foot pressure. This utility model relates to the technical field of sewing machine presser foot mechanisms. It includes: a presser foot plate; a lifting structure, the bottom of which is fixedly connected to the top of the presser foot plate; and an adjusting structure, the bottom of which is fixedly connected to the top of the lifting structure. The adjusting structure includes a protective shell, with a slide rail symmetrically slidably connected to the inner wall of the protective shell. The bottom of the slide rail is fixedly connected to the lifting structure. A lead screw is rotatably connected to the inner wall of the protective shell, and a slider is threadedly connected to the outer wall of the lead screw. Springs are symmetrically fixedly connected to the bottom of the sliders. A support rod is fixedly connected to the inner wall of the protective shell. The adjusting structure symmetrically arranges two sets of springs. Compared to traditional single-spring sewing machine presser feet, this design can meet the needs of sofa fabrics requiring higher presser foot pressure.

Description

Technical Field

[0001] This utility model relates to the technical field of sewing machine presser foot mechanisms, specifically a presser foot mechanism for sofa sewing that facilitates adjustment of presser foot pressure. Background Technology

[0002] In today's booming furniture manufacturing industry, sofas, as core products in the home environment, are increasingly reliant on quality control in their production processes. Sofa sewing, as an indispensable step, directly determines the sofa's aesthetic appeal, structural sturdiness, and comfort. While traditional sewing machine presser foot mechanisms can adjust pressure to some extent to suit different sewing needs, with the increasing diversity of sofa fabrics and rising consumer demands for quality, traditional presser foot mechanisms, often employing a single-spring structure, are insufficient for materials requiring higher presser foot pressure. Therefore, to address these issues, this utility model has been developed. Utility Model Content

[0003] (a) Technical problems to be solved

[0004] To address the shortcomings of existing technologies, this utility model provides a sofa sewing presser foot mechanism that facilitates adjustment of presser foot pressure, solving the problem that a single spring structure cannot meet the demand when the sewing material requires greater presser foot pressure.

[0005] (II) Technical Solution

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] Preferably, the device includes a presser foot; a lifting structure, the bottom of which is fixedly connected to the top of the presser foot; and an adjusting structure, the bottom of which is fixedly connected to the top of the lifting structure. The adjusting structure includes a protective shell, a slide rail symmetrically slidably connected to the inner wall of the protective shell, the bottom of which is fixedly connected to the lifting structure; a lead screw rotatably connected to the inner wall of the protective shell; a slider threadedly connected to the outer wall of the lead screw; springs symmetrically fixedly connected to the bottom of the sliders; and a support rod fixedly connected to the inner wall of the protective shell. By changing the compression or tension state of the springs, the initial pressure can be adjusted to meet the initial pressing force requirements of different fabric materials.

[0008] Preferably, the support rod passes through the spring and extends to both sides, the bottom of the spring is fixedly connected to the top of the carriage, and the support rod adopts a cylindrical structure.

[0009] Preferably, the inner wall of the carriage is slidably connected to the outer wall of the support rod to further ensure the stability of the carriage.

[0010] Preferably, the lifting structure includes a support shell, with a worm gear, a worm wheel, and a gear rotatably connected to the inner wall of the support shell, and a rack slidably connected to the inner wall of the support shell. The support shell effectively protects and supports the internal device.

[0011] Preferably, the outer wall of the worm gear meshes with the outer wall of the worm wheel, and the outer wall of the gear meshes with the outer wall of the rack. When the fabric thickness changes during sewing, the operator can adjust the height of the presser foot by rotating the worm gear and utilizing the transmission relationship between the worm wheel, worm gear, and rack.

[0012] Preferably, the outer wall of the worm gear is fixedly connected to the outer wall of the gear, the bottom of the rack is fixedly connected to the top of the pressure foot plate, the top of the support shell is fixedly connected to the bottom of the slide, and an anti-slip wheel is fixedly connected to the end of the worm away from the worm gear, which facilitates manual rotation by the operator.

[0013] (III) Beneficial Effects

[0014] This utility model provides a presser foot mechanism for sofa sewing that facilitates adjustment of presser foot pressure. It has the following beneficial effects:

[0015] (i) The sofa sewing presser foot mechanism that facilitates adjustment of presser foot pressure uses a screw and slider threaded connection in the adjustment structure. Rotating the screw moves the slider, thereby changing the compression or tension state of the spring and adjusting the initial pressure to meet the initial pressing force requirements of different fabric materials. Two sets of springs are symmetrically arranged in the adjustment structure. Compared with the traditional single-spring sewing machine presser foot, it can meet the needs of sofa fabric materials that require greater presser foot pressure.

[0016] (ii) The sofa sewing presser foot mechanism that facilitates adjustment of presser foot pressure adopts a combination design of worm gear, worm wheel, gear and rack in the lifting structure. When the fabric thickness changes during the sewing process, the operator can rotate the worm gear and use the transmission relationship of worm wheel, worm wheel and gear rack to adjust the height of the presser foot plate. When encountering thinner fabric, it can be pressed down to tighten, and when encountering thicker fabric, it can be raised to ensure that the fabric can be stably clamped throughout the sewing process. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the internal structure of this utility model;

[0019] Figure 3 This is a schematic diagram of the internal structure of the adjustment structure of this utility model;

[0020] Figure 4 This is a schematic diagram of the internal structure of the lifting structure of this utility model.

[0021] In the diagram: 1. Presser foot; 2. Lifting structure; 3. Adjustment structure; 21. Support shell; 22. Anti-slip wheel; 23. Worm gear; 24. Worm wheel; 25. Gear; 26. Rack; 31. Protective shell; 32. Lead screw; 33. Slider; 34. Spring; 35. Support rod; 36. Carriage. Detailed Implementation

[0022] 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 protection scope of the present utility model.

[0023] Please see Figure 1-4 This utility model provides a technical solution: a presser foot 1; a lifting structure 2, the bottom of which is fixedly connected to the top of the presser foot 1; an adjusting structure 3, the bottom of which is fixedly connected to the top of the lifting structure 2; the adjusting structure 3 includes a protective shell 31, a slide 36 symmetrically slidably connected to the inner wall of the protective shell 31, the bottom of the slide 36 being fixedly connected to the lifting structure 2, a lead screw 32 rotatably connected to the inner wall of the protective shell 31, a slider 33 threadedly connected to the outer wall of the lead screw 32, a spring 34 symmetrically fixedly connected to the bottom of the slider 33, and a support rod 35 fixedly connected to the inner wall of the protective shell 31. In use, this sofa sewing presser foot mechanism, which facilitates adjustment of presser foot pressure, is mainly used in the sewing process of sofa manufacturing. It is connected to the transmission mechanism inside the sewing machine and aims to control the pressure of the presser foot on the sofa fabric to adapt to the sewing needs of fabrics of different materials and thicknesses, and ensure sewing quality.

[0024] The support rod 35 passes through the spring 34 and extends to both sides, and the bottom of the spring 34 is fixedly connected to the top of the carriage 36.

[0025] The inner wall of the slide 36 is slidably connected to the outer wall of the support rod 35. During operation, the initial pressure of the press foot is first adjusted by adjusting the adjustment structure 3. The protective shell 31 of the adjustment structure 3 contains the slide 36, the lead screw 32, the slider 33, the spring 34, and the support rod 35. First, the lead screw 32 is rotated. Since the lead screw 32 is threadedly connected to the slider 33, the slider 33 will move along the lead screw 32. One end of the spring 34 at the bottom of the slider 33 is fixed to the slider 33, and the other end is fixed to the top of the slide 36. The support rod 35 passes through the spring 34 and is slidably connected to the inner wall of the slide 36. This allows the spring 34 to be compressed or stretched as the slider 33 moves. When the spring 34 is compressed downward, the downward pressure it exerts on the slide 36 increases, and vice versa.

[0026] The lifting structure 2 includes a support shell 21, with a worm gear 23, a worm wheel 24 and a gear 25 rotatably connected to the inner wall of the support shell 21, and a rack 26 slidably connected to the inner wall of the support shell 21.

[0027] The outer wall of the worm 23 meshes with the outer wall of the worm wheel 24, and the outer wall of the gear 25 meshes with the outer wall of the rack 26.

[0028] The outer wall of the worm gear 24 is fixedly connected to the outer wall of the gear 25, the bottom of the rack 26 is fixedly connected to the top of the pressure foot plate 1, the top of the support shell 21 is fixedly connected to the bottom of the slide 36, and an anti-slip wheel 22 is fixedly connected to the end of the worm 23 away from the worm gear 24. Then, the lifting structure 2 further controls the up and down movement of the pressure foot plate 1, and the worm 23 inside the support shell 21 rotates. The worm 23 meshes with the outer wall of the worm gear 24, driving the worm gear 24 to rotate synchronously. The outer wall of the worm gear 24 is also fixedly connected to the outer wall of the gear 25, and the gear 25 meshes with the outer wall of the rack 26. The bottom of the rack 26 is fixedly connected to the top of the presser foot 1. Therefore, as the worm gear 24 and the gear 25 rotate, the rack 26 will drive the presser foot 1 to move up and down. During the sewing process, when the fabric thickness changes, the presser foot height can be adjusted in real time by rotating the worm gear 23. When encountering thinner fabric, rotating the worm gear 23 will lower the rack 26 and press down the presser foot 1 to ensure that the fabric is pressed tightly. When encountering thicker fabric, the operation is reversed. At the same time, the anti-slip wheel 22 at one end of the worm gear 23 allows the operator to manually apply force to rotate it, meeting the complex and varied process requirements of sofa sewing.

[0029] When in use, this sofa sewing presser foot mechanism, which is easy to adjust the presser foot pressure, is mainly used in the sewing process of sofa manufacturing. It is connected to the transmission mechanism inside the sewing machine and aims to control the pressure of the presser foot on the sofa fabric to adapt to the sewing needs of different materials and thicknesses of fabrics and ensure sewing quality.

[0030] During operation, the initial pressure of the presser foot is first adjusted by adjusting structure 3. The protective shell 31 of adjusting structure 3 contains a slide 36, a lead screw 32, a slider 33, a spring 34, and a support rod 35. First, the lead screw 32 is rotated. Since the lead screw 32 is threadedly connected to the slider 33, the slider 33 will move along the lead screw 32. One end of the spring 34 at the bottom of the slider 33 is fixed to the slider 33, and the other end is fixed to the top of the slide 36. The support rod 35 passes through the spring 34 and is slidably connected to the inner wall of the slide 36. This allows the spring 34 to be compressed or stretched as the slider 33 moves. When the spring 34 is compressed downward, the downward pressure it exerts on the slide 36 increases, and vice versa.

[0031] Next, the lifting structure 2 further controls the up-and-down movement of the presser foot 1. The worm gear 23 inside the support shell 21 rotates, and the worm gear 23 meshes with the outer wall of the worm wheel 24, driving the worm wheel 24 to rotate synchronously. The outer wall of the worm wheel 24 is fixedly connected to the outer wall of the gear 25, and the gear 25 meshes with the outer wall of the rack 26. The bottom of the rack 26 is fixedly connected to the top of the presser foot 1. Therefore, as the worm wheel 24 and the gear 25 rotate, the rack 26 will drive the presser foot 1 to move up and down. During the sewing process, when the fabric thickness changes, the presser foot height can be adjusted in real time by rotating the worm gear 23. When encountering thinner fabric, rotating the worm gear 23 causes the rack 26 to descend, and the presser foot 1 presses down to ensure that the fabric is pressed tightly. When encountering thicker fabric, the operation is reversed. At the same time, the anti-slip wheel 22 at one end of the worm gear 23 allows the operator to manually apply force to rotate it, meeting the complex and varied process requirements of sofa sewing.

[0032] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0033] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A presser foot mechanism for sofa sewing that facilitates adjustment of presser foot pressure, characterized in that: Presser foot plate (1); The bottom of the lifting structure (2) is fixedly connected to the top of the pressure foot plate (1); Adjustment structure (3), the bottom of which is fixedly connected to the top of lifting structure (2); The adjustment structure (3) includes a protective shell (31), a slide (36) is symmetrically slidably connected to the inner wall of the protective shell (31), the bottom of the slide (36) is fixedly connected to the lifting structure (2), a lead screw (32) is rotatably connected to the inner wall of the protective shell (31), a slider (33) is threadedly connected to the outer wall of the lead screw (32), a spring (34) is symmetrically fixedly connected to the bottom of the slider (33), and a support rod (35) is fixedly connected to the inner wall of the protective shell (31).

2. The presser foot mechanism for sewing of a sofa according to claim 1, wherein: The support rod (35) passes through the spring (34) and extends to both sides, and the bottom of the spring (34) is fixedly connected to the top of the carriage (36).

3. The presser foot mechanism for sewing of a sofa according to claim 1, wherein: The inner wall of the carriage (36) is slidably connected to the outer wall of the support rod (35).

4. A sofa sewing presser foot mechanism for easy adjustment of presser foot pressure according to claim 1, characterized in that: The lifting structure (2) includes a support shell (21), the inner wall of which is rotatably connected to a worm (23), a worm wheel (24) and a gear (25), and the inner wall of the support shell (21) is slidably connected to a rack (26).

5. A sofa sewing presser foot mechanism for easy adjustment of presser foot pressure according to claim 4, characterized in that: The outer wall of the worm (23) meshes with the outer wall of the worm wheel (24), and the outer wall of the gear (25) meshes with the outer wall of the rack (26).

6. A sofa sewing presser foot mechanism for easy adjustment of presser foot pressure according to claim 4, characterized in that: The outer wall of the worm wheel (24) is fixedly connected to the outer wall of the gear (25), the bottom of the rack (26) is fixedly connected to the top of the pressure foot plate (1), the top of the support shell (21) is fixedly connected to the bottom of the slide (36), and an anti-slip wheel (22) is fixedly connected to the end of the worm (23) away from the worm wheel (24).

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