Sewing machine presser foot floating structure and sewing machine

Abstract

The application relates to the sewing technical field, in particular to a sewing machine presser foot floating structure and a sewing machine. The sewing machine presser foot floating structure comprises a machine body assembly, a presser foot assembly and a supporting assembly. The presser foot assembly is installed on the machine body assembly and can move towards or away from the needle plate. A first abutting part is arranged on the presser foot assembly. The supporting assembly is installed on the machine body assembly, and a second abutting part is arranged on the supporting assembly. When the presser foot assembly moves towards the needle plate, the first abutting part can abut against the second abutting part, so that one end of the presser foot assembly close to the needle plate is arranged with a preset gap. The sewing machine presser foot floating structure and the sewing machine provided by the application solve the problem that the existing synchronous sewing machine is prone to wrinkling when sewing thin materials.

Description

Technical Field

[0001] This application relates to the field of sewing technology, and in particular to a sewing machine presser foot lifting structure and a sewing machine. Background Technology

[0002] Synchronous sewing machines are industrial sewing equipment that uses the synchronous movement of the needle bar, teeth, and presser foot. They are mainly used in processing thick materials such as leather, sofas, and bags. However, with the development of market demand, there is a need for sewing thin materials. Because the feeding method of synchronous sewing machines is different from that of flatbed sewing machines, and due to factors such as improper presser foot pressure, improper alternation settings, and excessive speed, synchronous sewing machines are prone to wrinkling when sewing thin materials. At high speeds, they are also prone to problems such as dense stitches and uneven stitches, which affect the sewing effect.

[0003] To address these issues and improve sewing quality, several presser foot lifting solutions have been designed. Currently, presser foot lifting functionality is generally achieved through new structural designs, improved presser feet, and modified presser foot drive mechanisms. These structures enable alternating presser foot movement and adaptive presser foot height adjustment, aiming to ensure smooth material feeding and reduce fabric pressure marks, thereby minimizing wrinkles during sewing and improving sewing quality. However, for synchronous sewing machines, which employ dual-synchronous feeding for smooth material delivery, alternating presser foot movement is not considered. Furthermore, adaptive presser foot height adjustment technology requires significant space and modifications to most parts, making it unsuitable for synchronous sewing machines. In other words, there is currently a lack of a simple, easily adjustable presser foot lifting structure suitable for synchronous sewing machines to improve the sewing results of thin fabrics. Utility Model Content

[0004] Therefore, it is necessary to provide a sewing machine presser foot lifting structure and a sewing machine to solve the problem of wrinkling when sewing thin materials in existing synchronous sewing machines.

[0005] This application provides a sewing machine presser foot floating structure, which includes a machine body assembly, a presser foot assembly, and a support assembly. The presser foot assembly is mounted on the machine body assembly and can move relative to the machine body assembly toward or away from the needle plate. The presser foot assembly is provided with a first abutting portion. The support assembly is mounted on the machine body assembly and is provided with a second abutting portion. When the presser foot assembly moves toward the needle plate, the first abutting portion abuts against the second abutting portion, so that the end of the presser foot assembly near the needle plate is set with a preset gap from the needle plate.

[0006] In one embodiment, the support assembly includes a support base and a support plate, the support base being mounted on the body assembly; the support plate being connected to the support base; wherein the second abutment portion is disposed on the support plate, and the height of the support base relative to the body assembly is adjustable, and / or the height of the support plate relative to the support base is adjustable.

[0007] In one embodiment, the body assembly includes a clamping rod bushing, and the support base includes a fixing part and a clamping part. The fixing part is sleeved on the outer periphery of the clamping rod bushing; the clamping part is connected to the fixing part and can cooperate with the fixing part to clamp the clamping rod bushing.

[0008] In one embodiment, the fixing part is provided with a first connecting plate, and the clamping part is provided with a second connecting plate. The first connecting plate and the second connecting plate are arranged opposite to each other and spaced apart. The sewing machine presser foot lifting structure also includes a first fastener, which passes through and connects the first connecting plate and the second connecting plate. The first fastener can drive the second connecting plate to move closer to the first connecting plate, so that the second connecting plate drives the clamping part to move and clamp the presser rod bushing.

[0009] In one embodiment, the support base has a first adjustment hole, the support plate has a second adjustment hole, and the sewing machine presser foot lifting structure further includes a second fastener, which passes through the first adjustment hole and the second adjustment hole to fix the support base and the support plate.

[0010] In one embodiment, one of the first adjustment hole and the second adjustment hole is configured as a waist-shaped hole.

[0011] In one embodiment, the support plate includes a first connecting segment and a second connecting segment, the first connecting segment being connected to the support base; the second connecting segment is arranged at an angle to the first connecting segment and is connected to the first connecting segment, wherein the second connecting segment forms the second abutment portion.

[0012] In one embodiment, the presser foot assembly includes a presser foot rod, an outer presser foot, and a presser foot guide post frame. The presser foot rod is movably mounted on the body assembly. The outer presser foot is connected to one end of the presser foot rod. The presser foot guide post frame includes a third connecting section and a fourth connecting section. The third connecting section is connected to the side of the presser foot rod, and the fourth connecting section is set at an angle to the third connecting section and connected to the third connecting section. The fourth connecting section forms the first abutment portion.

[0013] In one embodiment, the second connecting section is provided with a clearance groove, the presser foot rod passes through the clearance groove and abuts against the side wall of the clearance groove.

[0014] This application also provides a sewing machine that includes the presser foot lifting structure described in any of the above embodiments.

[0015] Compared with existing technologies, the sewing machine presser foot lifting structure and sewing machine provided in this application, by setting up a support component, ensure that when the presser foot assembly moves towards the needle plate, the first abutment part on the presser foot assembly first contacts the second abutment part on the support component, thereby preventing the presser foot assembly from continuing to move towards the needle plate. That is, the support component can control the relative position of the presser foot assembly, especially the extreme position of the presser foot assembly moving towards the needle plate, thus creating a gap between the end of the presser foot assembly near the needle plate and the needle plate, thereby alleviating the problems of poor feed, wrinkling of thin materials, and damage to the fabric caused by excessive pressure from the presser foot assembly. Simultaneously, the support component also has a certain buffering effect; when the presser foot assembly moves to the point where the first and second abutment parts contact, the support component can absorb some of the impact, thereby reducing rebound and achieving stable feed and reducing the number of dense and uneven stitches. Attached Figure Description

[0016] 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.

[0017] Figure 1 A schematic diagram of the structure of a sewing machine according to an embodiment of this application;

[0018] Figure 2 A schematic diagram of a partial structure of a sewing machine according to an embodiment of this application;

[0019] Figure 3 A schematic diagram showing the presser foot floating according to an embodiment provided in this application;

[0020] Figure 4 A schematic diagram of the structure of a support component according to an embodiment of this application;

[0021] Figure 5 A schematic diagram of the structure of a support base according to an embodiment of this application;

[0022] Figure 6 A schematic diagram of the structure of a support plate according to an embodiment of this application.

[0023] The symbols in the diagram represent the following meanings:

[0024] 100. Sewing machine presser foot lifting structure; 10. Machine body assembly; 11. Machine housing; 12. Presser rod bushing; 13. Needle plate; 14. Feed dog; 20. Presser foot assembly; 21. Presser foot bar; 22. Outer presser foot; 23. Presser foot guide post frame; 231. Third connecting section; 232. Fourth connecting section; 2321. First abutment part; 30. Support assembly; 31. Support base; 3101. First adjustment hole; 311 3111, First connecting plate; 312, Clamping part; 3121, Second connecting plate; 32, Support plate; 3201, Second adjusting hole; 3202, Clearance groove; 321, First connecting section; 322, Second connecting section; 3221, Second abutting part; 33, First fastener; 34, Second fastener; 40, Pressing rod; 41, Inner presser foot; 50, Linkage drive assembly; 200, Sewing machine. Detailed Implementation

[0025] 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.

[0026] 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.

[0027] 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.

[0028] 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.

[0029] 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.

[0030] Synchronous sewing machines are industrial sewing equipment that uses the synchronous movement of the needle bar, teeth, and presser foot. They are mainly used in processing thick materials such as leather, sofas, and bags. However, with the development of market demand, there is a need for sewing thin materials. Because the feeding method of synchronous sewing machines is different from that of flatbed sewing machines, and due to factors such as improper presser foot pressure, improper alternation settings, and excessive speed, synchronous sewing machines are prone to wrinkling when sewing thin materials. At high speeds, they are also prone to problems such as dense stitches and uneven stitches, which affect the sewing effect.

[0031] To address these issues and improve sewing quality, several presser foot lifting solutions have been designed. Currently, presser foot lifting functionality is generally achieved through new structural designs, improved presser feet, and modified presser foot drive mechanisms. These structures enable alternating presser foot movement and adaptive presser foot height adjustment, aiming to ensure smooth material feeding and reduce fabric pressure marks, thereby minimizing wrinkles during sewing and improving sewing quality. However, for synchronous sewing machines, which employ dual-synchronous feeding for smooth material delivery, alternating presser foot movement is not considered. Furthermore, adaptive presser foot height adjustment technology requires significant space and modifications to most parts, making it unsuitable for synchronous sewing machines. In other words, there is currently a lack of a simple, easily adjustable presser foot lifting structure suitable for synchronous sewing machines to improve the sewing results of thin fabrics.

[0032] Please see Figures 1-6 This application provides a presser foot lifting structure 100 for sewing machines. This presser foot lifting structure 100 can be applied to sewing machines 200, especially synchronous sewing machines 200, to solve the problem that existing synchronous sewing machines 200 are prone to wrinkling when sewing thin materials.

[0033] Specifically, the sewing machine presser foot lifting structure 100 includes a body assembly 10, a presser foot assembly 20, and a support assembly 30. The presser foot assembly 20 is mounted on the body assembly 10 and can move relative to the body assembly 10 towards or away from the needle plate 13. The presser foot assembly 20 is provided with a first abutment portion 2321. The support assembly 30 is mounted on the body assembly 10 and is provided with a second abutment portion 3221. When the presser foot assembly 20 moves towards the needle plate 13, the first abutment portion 2321 abuts against the second abutment portion 3221, so that the end of the presser foot assembly 20 near the needle plate 13 is set with a preset gap from the needle plate 13.

[0034] Understandably, by providing the support component 30, when the presser foot assembly 20 moves towards the needle plate 13, the first abutment portion 2321 on the presser foot assembly 20 will first contact the second abutment portion 3221 on the support component 30, thereby preventing the presser foot assembly 20 from continuing to move towards the needle plate 13. That is, the support component 30 can control the relative position of the presser foot assembly 20, especially the extreme position of the presser foot assembly 20 moving towards the needle plate 13, thus ensuring a gap between the end of the presser foot assembly 20 near the needle plate 13 and the needle plate 13. This alleviates the problems of poor feeding, wrinkling of thin materials, and damage to the fabric caused by excessive pressure from the presser foot assembly 20. Simultaneously, the support component 30 also has a certain buffering effect. When the presser foot assembly 20 moves to the point where the first abutment portion 2321 and the second abutment portion 3221 contact, the support component 30 can absorb some of the impact, thereby reducing rebound and achieving stable feeding and reducing the number of dense and small needles.

[0035] Please see Figure 1 and Figure 2 In one embodiment, the machine body assembly 10 includes a housing 11 and a pressure rod bushing 12. The housing 11 has a mounting hole (not shown) for fixing the pressure rod bushing 12. The sewing machine presser foot lifting structure 100 also includes a pressure rod 40 and an inner presser foot 41. The pressure rod 40 passes through the pressure rod bushing 12 and is movably engaged with the pressure rod bushing 12. The inner presser foot 41 is connected to one end of the pressure rod 40. The presser foot assembly 20 includes a presser foot rod 21 and an outer presser foot 22. The presser foot rod 21 is movably mounted on the machine body assembly 10, and the outer presser foot 22 is connected to one end of the presser foot rod 21. The inner presser foot 41 is inserted into a notch formed on the outer presser foot 22 so that synchronous feeding and smooth feeding can be achieved through the cooperation of the inner presser foot 41, the outer presser foot 22 and the needle plate 13 (feed dog 14).

[0036] Furthermore, the sewing machine presser foot lifting structure 100 also includes a linkage drive assembly 50, which is connected to the presser rod 40 and the presser foot rod 21 respectively, thereby realizing the driving of the inner presser foot 41 and the outer presser foot 22.

[0037] To adjust the fabric pressure exerted by the outer presser foot 22 and the inner presser foot 41, in this embodiment, the height of the second abutment portion 3221 relative to the needle plate 13 is adjustable. Thus, when the height of the second abutment portion 3221 is increased, the gap between the presser foot assembly 20 and the needle plate 13 increases accordingly, thereby reducing the pressure on the fabric. Conversely, when the height of the second abutment portion 3221 is decreased, the gap between the presser foot assembly 20 and the needle plate 13 decreases accordingly, thereby increasing the pressure on the fabric. In other words, by providing the second abutment portion 3221, the following can be achieved: Figure 3 The presser foot shows a floating effect. In addition, by adjusting the height of the second abutment part 3221, the gap between the presser foot assembly 20 and the needle plate 13 can be changed, thereby reasonably adjusting the pressure applied by the presser foot assembly 20 to fabrics of various thicknesses and avoiding feeding defects.

[0038] For example, in this embodiment, the gap between the presser foot assembly 20 and the needle plate 13 is set to 0.5mm, which can effectively reduce the pressure of the presser foot assembly 20 on the thin material and alleviate the problems of poor feeding and wrinkling of the thin material caused by excessive pressure of the presser foot assembly 20. Of course, the gap between the presser foot assembly 20 and the needle plate 13 can also be set to 0.4mm or 0.6mm, etc., which can be reasonably set according to actual needs.

[0039] In one embodiment, such as Figure 4 and Figure 5 As shown, the support assembly 30 includes a support base 31 and a support plate 32. The support base 31 is mounted on the body assembly 10, and the support plate 32 is connected to the support base 31. The second abutment portion 3221 is located on the support plate 32, and the height of the support base 31 relative to the body assembly 10 is adjustable, and / or the height of the support plate 32 relative to the support base 31 is adjustable. That is, in this embodiment, the height of the second abutment portion 3221 can be adjusted by changing the installation position of the support base 31 relative to the clamping rod bushing 12, or by changing the installation position of the support plate 32 relative to the support base 31. The overall structure is simple and easy to implement. Furthermore, the support assembly 30 occupies little space, is easy to install, requires no additional external devices, and is low in cost.

[0040] Furthermore, in one embodiment, the support base 31 includes a fixing part 311 and a clamping part 312. The fixing part 311 is sleeved on the outer periphery of the clamping rod bushing 12. The clamping part 312 is connected to the fixing part 311 and can cooperate with the fixing part 311 to clamp the clamping rod bushing 12. Thus, after the support base 31 moves to a predetermined position relative to the clamping rod bushing 12 to adjust the height of the support base 31, it can be locked by the clamping part 312 to ensure a reliable connection between the support base 31 and the clamping rod bushing 12.

[0041] To achieve the locking of the fixing part 311 and the clamping part 312, in one embodiment, the fixing part 311 is provided with a first connecting plate 3111, and the clamping part 312 is provided with a second connecting plate 3121. The first connecting plate 3111 and the second connecting plate 3121 are arranged opposite to each other and spaced apart. The sewing machine presser foot lifting structure 100 also includes a first fastener 33, which passes through and connects the first connecting plate 3111 and the second connecting plate 3121. The first fastener 33 can drive the second connecting plate 3121 to move closer to the first connecting plate 3111, so that the second connecting plate 3121 drives the clamping part 312 to move and clamp the pressure rod bushing 12. It is easy to understand that the clamping part 312 has a certain elasticity and can deform under force. Thus, during the locking process of the first fastener 33, the second connecting plate 3121 moves closer to the first connecting plate 3111 under the action of the locking force, and at the same time drives the clamping part 312 to clamp the pressure rod bushing 12. Meanwhile, the detachable connection of the first fastener 33 is also easy to disassemble, which not only facilitates the adjustment of the height of the support component 30, but also allows the support component 30 to be directly removed when sewing thick materials, so as not to affect the sewing of thick materials, making it highly applicable.

[0042] In one embodiment, such as Figure 6 As shown, the support base 31 has a first adjustment hole 3101, and the support plate 32 has a second adjustment hole 3201. The sewing machine presser foot lifting structure 100 also includes a second fastener 34, which passes through the first adjustment hole 3101 and the second adjustment hole 3201 to fix the support base 31 and the support plate 32. In this way, the support base 31 and the support plate 32 can be fixed together, ensuring the reliability of the connection between them.

[0043] Furthermore, to achieve height adjustment of the support plate 32 relative to the support base 31, one of the first adjustment hole 3101 and the second adjustment hole 3201 can be configured as an oblong hole, wherein the length direction of the oblong hole can be parallel to the moving direction of the presser foot rod 21. In this way, height adjustment can be achieved within the extension range of the oblong hole using the second fastener 34, simplifying the adjustment process. For example, the first adjustment hole 3101 can be configured as an oblong hole, while the second adjustment hole 3201 can be configured as a round hole.

[0044] However, this is not the only option. In other embodiments, both the first adjustment hole 3101 and the second adjustment hole 3201 can be configured as round holes, and the number of the first adjustment hole 3101 and the second adjustment hole 3201 can be increased. By cooperating with different first adjustment holes 3101 and second adjustment holes 3201, the height adjustment of the support plate 32 relative to the support base 31 can be achieved.

[0045] Specifically, such as Figure 6As shown, the support plate 32 includes a first connecting section 321 and a second connecting section 322. The first connecting section 321 is connected to the support base 31, and the second connecting section 322 is set at an angle to the first connecting section 321 and is connected to the first connecting section 321. The second connecting section 322 forms a second abutment portion 3221, and a second adjustment hole 3201 is formed in the first connecting section 321. That is, the support plate 32 is generally L-shaped, with a simple structure, and can simultaneously achieve connection and support effects.

[0046] To facilitate the cooperation between the presser foot assembly 20 and the support plate 32, in one embodiment, as follows: Figure 2 As shown, the presser foot assembly 20 also includes a presser foot guide post 23. The presser foot guide post 23 includes a third connecting section 231 and a fourth connecting section 232. The third connecting section 231 is connected to the side of the presser foot rod 21, and the fourth connecting section 232 is set at an angle to the third connecting section 231 and is connected to the third connecting section 231. The fourth connecting section 232 forms a first abutting part 2321. Similarly, the presser foot guide post 23 is also L-shaped. The presser foot guide post 23 can increase the contact area with the presser foot rod 21 through the third connecting section 231, improving the connection reliability. At the same time, the abutting is achieved through the fourth connecting section 232. The overall structure is simple and easy to process.

[0047] Furthermore, a clearance groove 3202 is provided on the second connecting section 322, through which the presser foot rod 21 passes and abuts against the side wall of the clearance groove 3202. In this way, the space occupied by the support plate 32 can be further reduced, and it can be ensured that the presser foot guide column frame 23 and the support plate 32 can abut against each other when the presser foot assembly 20 moves downward, thereby improving the reliability of the overall structure.

[0048] The installation method of the support assembly 30 provided in this application is as follows: First, the support base 31 is fitted onto the pressure rod bushing 12. During installation, it can be pressed down directly to the bottom, so that the support base 31 abuts against the end of the mounting hole on the housing 11 for positioning. Then, the support plate 32 is installed on the support base 31, and the clearance groove 3202 on the support plate 32 is pressed against the pressure foot rod 21. The support base 31 is then locked to the pressure rod bushing 12 by the first fastener 33. Then, the position of the support plate 32 is adjusted so that the outer pressure foot 22 moves to the limit and has a preset gap with the needle plate 13. The second fastener 34 is then locked to complete the installation. If the pressure foot is not raised enough, the support base 31 can also be adjusted upwards appropriately.

[0049] The principle of the sewing machine presser foot lifting structure 100 provided in this application is as follows: Before the support component 30 of this application is installed, when the sewing machine 200 is running, the outer presser foot 22 installed on the presser foot bar 21 presses against the feed dog 14 with the movement of the machine. After the support component 30 of this application is installed, when the presser foot bar 21 moves, the presser foot guide column 23 will first contact the support plate 32, so that the outer presser foot 22 does not contact the feed dog 14, thus realizing the presser foot lifting function. Furthermore, after the presser foot is lifted, the gap between the feed dog 14 and the presser foot can effectively alleviate the problem of poor feeding caused by excessive presser foot pressure, thereby alleviating the problem of wrinkling of thin materials. At the same time, this structure also has a certain buffering effect. When the presser foot guide column 23 contacts the support plate 32, this structure can absorb part of the impact and reduce rebound, thereby achieving stable feeding and reducing the effects of dense stitches and large stitches.

[0050] This application also provides a sewing machine 200, which includes the sewing machine presser foot lifting structure 100 of any of the above embodiments.

[0051] 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.

[0052] 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 sewing machine presser foot lifting structure, characterized in that, include: Body components (10); Presser foot assembly (20), which is mounted on the body assembly (10) and is movable relative to the body assembly (10) toward or away from the needle plate (13), and the presser foot assembly (20) is provided with a first abutment part (2321). A support assembly (30) is mounted on the body assembly (10), and the support assembly (30) is provided with a second abutment (3221). When the presser foot assembly (20) moves toward the needle plate (13), the first abutting part (2321) can abut against the second abutting part (3221) so that the end of the presser foot assembly (20) near the needle plate (13) is set with a preset gap from the needle plate (13).

2. The sewing machine presser foot lifting structure according to claim 1, characterized in that, The support component (30) includes: Support base (31), the support base (31) is mounted on the body assembly (10); Support plate (32), the support plate (32) is connected to the support base (31); The second abutment part (3221) is provided on the support plate (32), and the height of the support base (31) relative to the body assembly (10) is adjustable, and / or the height of the support plate (32) relative to the support base (31) is adjustable.

3. The sewing machine presser foot lifting structure according to claim 2, characterized in that, The body assembly (10) includes a clamping rod bushing (12), and the support base (31) includes: A fixing part (311) is sleeved on the outer periphery of the clamping rod bushing (12); The clamping part (312) is connected to the fixing part (311) and can cooperate with the fixing part (311) to clamp the clamping rod bushing (12).

4. The sewing machine presser foot lifting structure according to claim 3, characterized in that, The fixing part (311) is provided with a first connecting plate (3111), and the clamping part (312) is provided with a second connecting plate (3121). The first connecting plate (3111) and the second connecting plate (3121) are arranged opposite to each other and spaced apart. The sewing machine presser foot lifting structure also includes: The first fastener (33) passes through and connects the first connecting plate (3111) and the second connecting plate (3121), and the first fastener (33) can drive the second connecting plate (3121) to move closer to the first connecting plate (3111), so that the second connecting plate (3121) drives the clamping part (312) to move and clamp the clamping rod bushing (12).

5. The sewing machine presser foot lifting structure according to claim 2, characterized in that, The support base (31) has a first adjustment hole (3101), and the support plate (32) has a second adjustment hole (3201). The sewing machine presser foot lifting structure also includes: The second fastener (34) passes through the first adjustment hole (3101) and the second adjustment hole (3201) to fix the support base (31) and the support plate (32).

6. The sewing machine presser foot lifting structure according to claim 5, characterized in that, One of the first adjustment hole (3101) and the second adjustment hole (3201) is configured as an oblong hole.

7. The sewing machine presser foot lifting structure according to claim 2, characterized in that, The support plate (32) includes: The first connecting segment (321) is connected to the support base (31); The second connecting segment (322) is set at an angle to the first connecting segment (321) and is connected to the first connecting segment (321), wherein the second connecting segment (322) forms the second abutment portion (3221).

8. The sewing machine presser foot lifting structure according to claim 7, characterized in that, The presser foot assembly (20) includes: Presser foot lever (21), which is movably mounted on the body assembly (10); An outer pressure foot (22) is connected to one end of the pressure foot rod (21); The presser foot guide column (23) includes a third connecting section (231) and a fourth connecting section (232). The third connecting section (231) is connected to the side of the presser foot rod (21). The fourth connecting section (232) is set at an angle to the third connecting section (231) and is connected to the third connecting section (231). The fourth connecting section (232) forms the first abutment part (2321).

9. The sewing machine presser foot lifting structure according to claim 8, characterized in that, The second connecting section (322) is provided with a relief groove (3202), and the presser foot rod (21) passes through the relief groove (3202) and abuts against the side wall of the relief groove (3202).

10. A sewing machine, characterized in that, Includes the sewing machine presser foot lifting structure as described in any one of claims 1-9.

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