Presser foot device, presser foot mechanism and buttonholing machine

Abstract

The utility model discloses a presser foot device, a presser foot mechanism and a buttonholing machine, and relates to the technical field of sewing machines, the presser foot device is combined with a first presser foot for use, the middle of the first presser foot is hollowed, a machine needle penetrates through the middle of the first presser foot, and the presser foot device comprises an installation assembly, a presser foot swing arm and a floating presser foot. The presser foot swing arm is rotationally mounted on the mounting assembly; a floating presser foot is rotationally installed on the presser foot swing arm and located in the first presser foot, a gap is reserved between the floating presser foot and a machine needle, and the floating presser foot is used for pressing cloth in the first presser foot. According to the presser foot device, through combined use of the presser foot device and the first presser foot, the problem that cloth is prone to fluctuating along with a needle in the sewing process is effectively solved, and the sewing quality and efficiency are improved.

Description

Technical Field

[0001] The present application relates to the technical field of sewing machines, and in particular to a presser foot device, a presser foot mechanism and a buttonhole machine. Background Art

[0002] As a special type of industrial sewing machine, buttonhole machines are mainly used for making buttonholes in clothing processing. This machine plays an important role in improving production efficiency and ensuring sewing quality. With the development of the fashion industry, the requirements for clothing details are getting higher and higher. As an important part of clothing, the quality and appearance of buttonholes directly affect the overall beauty and functionality of clothing.

[0003] Although existing buttonhole machines play a key role in sewing buttonholes, they have obvious defects when dealing with certain special fabrics, especially thin and stretchy fabrics. The traditional presser foot design makes it easy for the fabric to move with the ups and downs of the needle during the sewing process, resulting in unstable thread loops, which in turn cause thread breakage and skipped stitches. In addition, the existing presser foot is not sufficiently adaptable to changes in the surface of the fabric, making it difficult to ensure the efficiency and sewing quality of the machine when sewing fabrics of different thicknesses. These problems not only reduce production efficiency, but also affect the quality and consistency of the final product. Utility Model Content

[0004] The purpose of the present application is to provide a presser foot device, which effectively solves the problem that the cloth easily follows the needle during sewing by using the presser foot device in combination with the first presser foot, thereby improving the sewing quality and efficiency. Another purpose of the present application is to provide a presser foot mechanism and a buttonhole machine.

[0005] To achieve the above object, the present application provides a presser foot device, which is used in combination with a first presser foot, wherein the middle portion of the first presser foot is hollowed out, and the middle portion of the first presser foot passes through a machine needle, and the presser foot device comprises:

[0006] Install components;

[0007] A presser foot swing arm, rotatably mounted on the mounting assembly;

[0008] A floating presser foot is rotatably mounted on the presser foot swing arm, the floating presser foot is located in the first presser foot, a distance is left between the floating presser foot and the needle, and the floating presser foot is used to press the cloth in the first presser foot.

[0009] In some embodiments, the mounting assembly includes:

[0010] Presser foot mounting base;

[0011] The presser foot swing arm seat is fixedly mounted on the presser foot mounting base. The presser foot swing arm seat is provided with a rotating shaft. The rotating shaft is sleeved with a sliding bearing. The presser foot swing arm is sleeved on the sliding bearing.

[0012] In some embodiments, the mounting assembly further comprises:

[0013] A torsion spring shaft, fixedly mounted on the presser foot swing arm seat;

[0014] A torsion spring is fixedly mounted on the torsion spring shaft, and an extended end of the torsion spring abuts against the presser foot swing arm.

[0015] In some embodiments, the presser foot swing arm is provided with a slot, and the slot abuts against the extended end of the torsion spring.

[0016] In some embodiments, the presser foot swing arm is provided with a limit arm, and the limit arm limits the rotation angle of the presser foot swing arm relative to the mounting assembly by contacting the presser foot swing arm seat.

[0017] The present application also provides a presser foot mechanism, comprising a first presser foot and the above-mentioned presser foot device.

[0018] In some embodiments, the first presser foot is installed on a first mounting mechanism of a buttonholer machine, and the first mounting mechanism is used to control the movement and lifting and pressing of the first presser foot; the presser foot device is installed on a second mounting mechanism of the buttonholer machine, and the second mounting mechanism is used to control the lifting and pressing of the floating presser foot.

[0019] In some embodiments, the first mounting mechanism comprises:

[0020] Sports arm;

[0021] A track frame is fixedly mounted on the moving arm, the track frame is provided with a slide groove, and the first presser foot is mounted on the track frame.

[0022] In some embodiments, the second mounting mechanism comprises:

[0023] Mounting rod;

[0024] A pulley bracket is fixedly mounted on the mounting rod, and a pulley is rotatably mounted on the pulley bracket. The pulley moves along the slide groove, so that when the first mounting mechanism controls the movement and lifting of the first presser foot, the second mounting mechanism controls the lifting of the floating presser foot.

[0025] The present application also provides a buttonhole machine, comprising the above-mentioned presser foot mechanism.

[0026] Compared with the above-mentioned background technology, the presser foot device provided in the present application is used in combination with the first presser foot, the middle part of the first presser foot is hollowed out, and the middle part of the first presser foot passes through the machine needle. The presser foot device includes a mounting assembly, a presser foot swing arm and a floating presser foot. The presser foot swing arm is rotatably installed on the mounting assembly; the floating presser foot is rotatably installed on the presser foot swing arm, the floating presser foot is located in the first presser foot, and a distance is left between the floating presser foot and the machine needle. The floating presser foot is used to press the fabric in the first presser foot.

[0027] In traditional buttonhole machines, the design of the presser foot is usually a rectangular hollow shape. This design makes the fabric easily fluctuate due to the movement of the needle during the sewing process. In particular, when processing thin elastic fabrics, the thin elastic characteristics of the fabric will cause it to move upward with the needle, thereby affecting the formation of the thread loop, causing the problem of thread breakage or skipped stitches. These problems not only reduce the sewing efficiency, but also affect the quality of the finished product. In view of this problem, the presser foot device provided in the present application is innovatively designed. When the presser foot device is used in combination with the first presser foot, the middle of the first presser foot passes through the needle, and the presser foot device includes a floating presser foot located in the first presser foot. A spacing is deliberately left between the floating presser foot and the needle. This design allows the floating presser foot to maintain a certain distance from the needle while pressing the fabric. Through the cooperation of the first presser foot and the presser foot device, the constant spacing maintained between the floating presser foot and the needle ensures the stable pressing of the fabric during the sewing process, effectively avoiding the fluctuation of the fabric caused by the movement of the needle, thereby maintaining the continuity and stability of the sewing process.

[0028] Due to the cooperation between the first presser foot and the presser foot device, and the floating presser foot maintaining a certain distance from the needle, the stability of the fabric during the sewing process has been significantly improved. The fabric no longer moves with the rise of the needle, which helps to maintain the stable formation of the thread loop and reduces the phenomenon of skipped stitches and thread breakage caused by unstable thread loops. This design not only improves the pressing effect of the fabric and ensures the smoothness of the sewing process, but also improves the stability of sewing, thereby improving the quality of the final product and production efficiency.

[0029] In addition, the presser foot swing arm is rotatably installed on the mounting assembly. When the thickness of the fabric changes, the presser foot swing arm can be rotated to make the floating presser foot rise or press down as the thickness of the fabric changes. The floating presser foot is rotatably installed on the presser foot swing arm so that it can automatically adjust to fit the fabric when the fabric is uneven.

[0030] Combined with the above structure and process description, it can be seen that the presser foot device has at least the following beneficial effects: the presser foot device effectively solves the problem that the cloth easily follows the ups and downs of the machine needle during the sewing process through the combined use of the presser foot device and the first presser foot, thereby improving the sewing quality and efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0032] Figure 1 A schematic diagram of a presser foot device provided in an embodiment of the present application;

[0033] Figure 2 A schematic diagram of a presser foot device, a presser foot mechanism and a buttonhole machine provided in an embodiment of the present application;

[0034] Figure 3 A schematic diagram of a first presser foot and a presser foot device provided in an embodiment of the present application;

[0035] Figure 4 A schematic diagram of a first presser foot provided in an embodiment of the present application;

[0036] Figure 5 An exploded view of a presser foot device provided in an embodiment of the present application;

[0037] Figure 6 An installation diagram of a first presser foot and a presser foot device provided in an embodiment of the present application;

[0038] Figure 7 Schematic diagram of a pulley bracket, a pulley and a track frame provided in an embodiment of the present application. Among them:

[0039] Buttonhole machine 100,

[0040] Presser foot device 1, mounting assembly 11, presser foot mounting base 111, presser foot swing arm seat 112, rotating shaft 113, sliding bearing 114, torsion spring shaft 115, torsion spring 116, presser foot swing arm 12, slot 121, limit arm 122, floating presser foot 13, axial screw 14,

[0041] First presser foot 2,

[0042] Needle 3,

[0043] The first mounting mechanism 4, the moving arm 41, the track frame 42, the slide slot 421,

[0044] The second mounting mechanism 5 , the mounting rod 51 , the pulley bracket 52 , and the pulley 53 . DETAILED DESCRIPTION

[0045] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0046] In order to enable those skilled in the art to better understand the present application, the present application is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0047] Please refer to Figures 1 to 3 , Figure 1 A schematic diagram of a presser foot device provided in an embodiment of the present application, Figure 2 Schematic diagram of a presser foot device, a presser foot mechanism and a buttonhole machine provided in an embodiment of the present application, Figure 3 A schematic diagram of a first presser foot and a presser foot device provided in an embodiment of the present application.

[0048] In a specific embodiment, Figure 1 , Figure 2 and Figure 4 As shown, the presser foot device 1 provided in the embodiment of the present application is used in combination with the first presser foot 2, the middle part of the first presser foot 2 is hollowed out, and the middle part of the first presser foot 2 passes through the machine needle 3. The presser foot device 1 includes a mounting assembly 11, a presser foot swing arm 12 and a floating presser foot 13. The presser foot swing arm 12 is rotatably mounted on the mounting assembly 11; the floating presser foot 13 is rotatably mounted on the presser foot swing arm 12, and the floating presser foot 13 is located in the first presser foot 2. A spacing is left between the floating presser foot 13 and the machine needle 3, and the floating presser foot 13 is used to press the cloth in the first presser foot 2.

[0049] Please refer to Figure 4 , Figure 4 Schematic diagram of the first presser foot provided in the embodiment of the present application. In some cases, the first presser foot 2 is a rectangular hollow shape, which causes the left and right presser positions to be closer to the machine needle and the front and rear presser positions to be farther from the machine needle. The left and right directions and the front and rear directions mentioned here are the same as Figure 2 The rectangular hollow shape corresponds to the arrow direction in the figure. The rectangular hollow shape is a conventional design of the first presser foot 2 in the conventional buttonhole machine 100. This design makes the fabric easily fluctuate due to the action of the needle 3 during sewing. Especially when processing thin elastic fabric, the thin elastic property of the fabric will cause it to move upward with the needle 3, thereby affecting the formation of the thread loop, causing thread breakage or skipped stitches. These problems not only reduce sewing efficiency, but also affect the quality of the finished product.

[0050] To address this problem, the presser foot device 1 provided in the present application is innovatively designed. When the presser foot device 1 is used in combination with the first presser foot 2, the middle of the first presser foot 2 passes through the machine needle 3, and the presser foot device 1 includes a floating presser foot 13 located in the first presser foot 2. A spacing is intentionally left between the floating presser foot 13 and the machine needle 3. This design allows the floating presser foot 13 to maintain a certain distance from the machine needle 3 while pressing the fabric. Through the cooperation of the first presser foot 2 and the presser foot device 1, the constant spacing maintained between the floating presser foot 13 and the machine needle 3 ensures the stable pressing of the fabric during the sewing process, effectively avoiding the ups and downs of the fabric caused by the movement of the machine needle 3, thereby maintaining the continuity and stability of the sewing process.

[0051] Due to the cooperation between the first presser foot 2 and the presser foot device 1, and the floating presser foot 13 maintaining a certain distance from the needle 3, the stability of the fabric during the sewing process is significantly improved. The fabric no longer moves with the rise of the needle 3, which helps to maintain the stable formation of the thread loop and reduces the phenomenon of skipped stitches and thread breakage caused by unstable thread loops. This design not only improves the pressing effect of the fabric and ensures the smoothness of the sewing process, but also improves the stability of sewing, thereby improving the quality and production efficiency of the final product.

[0052] In addition, the presser foot swing arm 12 is rotatably installed on the mounting assembly 11. When the thickness of the fabric changes, the presser foot swing arm 12 can be rotated to make the floating presser foot 13 rise or press down as the thickness of the fabric changes; the floating presser foot 13 is rotatably installed on the presser foot swing arm 12 so that it can automatically adjust to fit the fabric when the fabric is uneven.

[0053] Combined with the above structure and process description, it can be seen that the presser foot device 1 has at least the following beneficial effects: the presser foot device 1 effectively solves the problem that the cloth easily follows the ups and downs of the needle 3 during the sewing process through the combined use of the presser foot device 1 and the first presser foot 2, thereby improving the sewing quality and efficiency.

[0054] It should be noted that, except for the rectangular hollow shape mentioned in the above description, the first presser foot 2 of other hollow shapes shall also fall within the scope of the description of this application. In addition, the first presser foot 2 may be a single plate for pressing cloth, or a combination of multiple plates, which is not limited here; the first presser foot 2 may be a single plate set on the buttonhole machine, a single plate pressing cloth, or a combination of multiple plates, one plate set on the buttonhole machine, and another plate pressing cloth, which is not limited here.

[0055] It should be noted that the first presser foot 2 and the presser foot device 1 should be installed on different mechanisms of the template machine. When the template machine is working, the movements of the first presser foot 2 and the presser foot device 1 are at least not completely synchronized. For example, the movement of the presser foot device 1 can be avoided when the first presser foot 2 moves, thereby keeping the distance between the floating presser foot 13 and the needle 3 in the front-to-back direction constant.

[0056] The presser foot swing arm 12 is rotatably mounted on the mounting assembly 11 , and the distance between the floating presser foot 13 and the side of the fabric away from the floating presser foot 13 is adjusted by adjusting the rotation angle of the presser foot swing arm 12 relative to the mounting assembly 11 .

[0057] In this embodiment, the design of the presser foot device 1 is highly adaptable, and the mounting assembly 11 can be fixed on the corresponding mechanism of the buttonhole machine 100. The presser foot swing arm 12 can be rotatably mounted on the mounting assembly 11. This design allows the presser foot swing arm 12 to rotate relative to the mounting assembly 11, thereby adjusting the distance between the floating presser foot 13 and the bottom surface of the fabric. The floating presser foot 13 directly acts on the fabric. By adjusting the rotation angle between the presser foot swing arm 12 and the mounting assembly 11, the distance between the floating presser foot 13 and the bottom surface of the fabric can be changed, thereby adapting to fabrics with different top surface heights, that is, adapting to fabrics of different thicknesses.

[0058] The key advantage of this design lies in its flexibility and adjustability. No matter how the thickness of the fabric changes, the presser foot device 1 can ensure the cloth pressing effect of the floating presser foot 13 on the fabric by adjusting the position of the presser foot swing arm 12. This not only improves the adaptability of the sewing process, but also ensures the sewing quality and efficiency, because the fabric can be pressed evenly and stably, making the sewing stitches smoother and more precise. In this way, the presser foot device 1 can be widely used for fabrics of different types and thicknesses. When the presser foot device 1 is set on the buttonhole machine 100, the versatility and practicality of the buttonhole machine 100 are also enhanced.

[0059] The floating presser foot 13 is rotatably mounted on the presser foot swing arm 12. Based on the fact that the presser foot swing arm 12 can adapt to fabrics of different thicknesses by rotating relative to the mounting assembly 11, the floating presser foot 13 can also adapt to the surface condition of the fabric by rotating relative to the presser foot swing arm 12, so that when the fabric is uneven, it can automatically adjust to fit the fabric.

[0060] Optionally, the floating presser foot 13 is rotated on the presser foot swing arm 12 via an axial screw 14 .

[0061] Please refer to Figure 5 , Figure 5 This is an exploded view of the presser foot device provided in an embodiment of the present application.

[0062] like Figure 5 As shown, in some embodiments, the mounting assembly 11 includes: a presser foot mounting base 111; a presser foot swing arm seat 112, which is fixedly mounted on the presser foot mounting base 111, and a rotating shaft 113 is provided on the presser foot swing arm seat 112, and a sliding bearing 114 is mounted on the rotating shaft 113, and the presser foot swing arm 12 is mounted on the sliding bearing 114.

[0063] In this embodiment, the mounting assembly 11 ensures stable installation and flexible movement of the presser foot swing arm 12. Specifically, the mounting assembly 11 includes a presser foot mounting base 111, which is the support base of the entire assembly and provides a stable mounting platform for the presser foot device 1. The presser foot mounting base 111 can be fixed to the corresponding mechanism of the buttonhole machine 100 by screws.

[0064] The presser foot swing arm seat 112 is fixedly mounted on the presser foot mounting base 111. The presser foot swing arm seat 112 can be fixed on the presser foot mounting base 111 by screws. A rotating shaft 113 is provided on the presser foot swing arm seat 112, and this rotating shaft is the key to connecting and supporting the presser foot swing arm 12. A sliding bearing 114 is mounted on the rotating shaft 113. This design allows the presser foot swing arm 12 to rotate freely on the rotating shaft 113, while reducing friction and wear, and improving the operating efficiency and life of the entire presser foot device 1.

[0065] The presser foot swing arm 12 is mounted on the sliding bearing 114, which means that the presser foot swing arm 12 can be flexibly rotated on the presser foot swing arm seat 112, thereby realizing position adjustment according to the thickness of the fabric. Through this design, the presser foot swing arm 12 can be adjusted accordingly according to the thickness and characteristics of the fabric during sewing, ensuring that the fabric is always kept in an appropriately tight state during sewing.

[0066] In general, the design of the mounting assembly 11 not only provides the required stability of the presser foot device 1, but also allows the presser foot swing arm 12 to make necessary adjustments to adapt to different sewing requirements, thereby improving the flexibility and adaptability of the sewing process.

[0067] Please continue to refer to Figure 5 In some embodiments, the mounting assembly 11 further includes: a torsion spring shaft 115 fixedly mounted on the presser foot swing arm seat 112; a torsion spring 116 fixedly mounted on the torsion spring shaft 115, and an extended end of the torsion spring 116 abuts against the presser foot swing arm 12.

[0068] In this embodiment, the torsion spring 116 is used to apply a pre-pressing force to the presser foot swing arm 12 to drive the presser foot swing arm 12 to rotate so that the floating presser foot 13 presses the fabric. When the presser foot swing arm 12 rotates, the floating presser foot 13 moves accordingly to achieve the pressing of the fabric. The design of this pre-pressing force is very important because it ensures that the floating presser foot 13 is in a floating state and floats according to different conditions of the fabric, such as flatness and thickness. At the same time, the floating presser foot 13 can provide sufficient pressure to stabilize the fabric and prevent the fabric from moving or sliding during the sewing process, thereby ensuring the accuracy and consistency of sewing.

[0069] The torsion spring shaft 115 is a fixed unit of the pre-pressing part, and is fixedly mounted on the presser foot swing arm seat 112. This mounting method ensures the stability of the torsion spring shaft 115 and provides a solid support point for the torsion spring 116. The torsion spring 116 is fixedly mounted around the torsion spring shaft 115, and its design allows the torsion spring 116 to freely expand and compress on the torsion spring shaft 115.

[0070] The extended end of the torsion spring 116 abuts against the presser foot swing arm 12, and in this way, the force of the torsion spring 116 can be directly transmitted to the presser foot swing arm 12. The initial installation state of the torsion spring 116 is a compressed state. When the torsion spring 116 is compressed, it generates an outward force, which is transmitted to the presser foot swing arm 12 through the extended end of the torsion spring 116, pushing the presser foot swing arm 12 to rotate, thereby controlling the floating presser foot 13 to press the fabric.

[0071] This design enables the presser foot swing arm 12 to provide appropriate pressure as needed to adapt to fabrics of different thicknesses. The pre-pressure of the torsion spring 116 can be adjusted according to actual needs during sewing, thereby ensuring that the fabric remains stable during sewing and reducing sewing quality problems caused by fabric movement or sliding. Through this design of the pre-pressure part, the floating presser foot device 1 can achieve more flexible and accurate fabric pressing control, thereby improving sewing quality and efficiency.

[0072] Please continue to refer to Figure 5 In some embodiments, the presser foot swing arm 12 is provided with a slot 121 , and the slot 121 abuts against the extended end of the torsion spring 116 .

[0073] In this embodiment, the design of the presser foot swing arm 12 particularly includes a key feature, namely, a slot 121. The slot 121 is a groove on the presser foot swing arm 12, which directly abuts against the extended end of the torsion spring 116. Through this design, the force of the torsion spring 116 can be directly transmitted to the presser foot swing arm 12, thereby driving the presser foot swing arm 12 and its related components to rotate.

[0074] The existence of the clamping groove 121 not only provides a stable connection point, but also ensures that the force of the torsion spring 116 can be effectively transmitted to the presser foot swing arm 12, thereby affecting the overall movement of the presser foot swing arm 12. This design allows the presser foot swing arm 12 to be properly adjusted according to the pre-pressure of the torsion spring 116, adapting to different thicknesses of fabrics while ensuring the pressing effect on the fabrics.

[0075] When the torsion spring 116 is compressed or stretched, its force is transmitted to the presser foot swing arm 12 through the slot 121, causing the presser foot swing arm 12 to rotate. This rotation in turn causes the distance between the floating presser foot 13 and the bottom surface of the fabric to change, thereby achieving dynamic compression of the fabric. The design of the slot 121 ensures that the force transmission is both direct and effective, thereby improving the response speed and adjustment accuracy of the presser foot swing arm 12.

[0076] Optionally, the connection line between the contact position of the torsion spring 116 and the slot 121 and the rotation position of the presser foot swing arm 12 is the first connection line, the connection line between the pressing position of the floating presser foot 13 and the fabric and the rotation position of the presser foot swing arm 12 is the second connection line, and the angle between the first connection line and the second connection line is an obtuse angle. This angle design helps to optimize the force transmission path, so that the floating presser foot 13 can press the fabric more stably and evenly.

[0077] Please continue to refer to Figure 5 In some embodiments, the presser foot swing arm 12 is provided with a limit arm 122 , and the limit arm 122 contacts the presser foot swing arm seat 112 to limit the rotation angle of the presser foot swing arm 12 relative to the mounting assembly 11 .

[0078] In this embodiment, the design of the presser foot swing arm 12 further enhances its functionality and stability by introducing a limit arm 122. The limit arm 122 is a component of the presser foot swing arm 12, and its main function is to limit the rotation angle of the presser foot swing arm 12 relative to the mounting assembly 11.

[0079] Specifically, the limiting arm 122 realizes its limiting function by contacting the presser foot swing arm seat 112. This contact can be direct physical contact or indirect restriction realized by other mechanical structures. The design of the limiting arm 122 ensures that the presser foot swing arm 12 will not exceed a predetermined angle range when rotating, thereby ensuring that the pressing force of the floating presser foot 13 on the cloth is within a controllable range.

[0080] When the limiting arm 122 contacts the presser foot swing arm seat 112, the limiting arm 122 is in a high position, the floating presser foot 13 is in a low position, and the distance between the floating presser foot 13 and the bottom surface of the cloth is the minimum distance. At this time, the torsion spring 116 applies force to the presser foot swing arm 12, and the presser foot swing arm 12 maintains this position.

[0081] In some cases, the bottom surface of the floating presser foot 13 is in a flat shape, and the floating presser foot 13 is located on one side of the needle 3, and its bottom surface directly contacts the top surface of the fabric. This design makes the floating presser foot 13 a key part for directly pressing the fabric, ensuring that the fabric remains stable during sewing, reducing movement and sliding.

[0082] The contact between the bottom surface of the floating presser foot 13 and the fabric not only provides the necessary pressing force, but also helps to maintain the flatness of the fabric, which is essential for ensuring the uniformity and accuracy of the sewing line. In addition to the planar structure of the floating presser foot 13, the floating presser foot 13 may also include other additional structures, which play a connecting role and firmly connect the floating presser foot 13 to the presser foot swing arm 12.

[0083] The present application also provides a presser foot mechanism, comprising a first presser foot 2 and the above-mentioned presser foot device 1. The presser foot mechanism should have all the beneficial effects of the above-mentioned presser foot device 1, which will not be described one by one here.

[0084] Please refer to Figure 6 , Figure 6 This is an installation diagram of the first presser foot and the presser foot device provided in an embodiment of the present application.

[0085] In some embodiments, the first presser foot 2 is installed on the first mounting mechanism 4 of the buttonholer machine 100, and the first mounting mechanism 4 is used to control the movement and lifting and pressing of the first presser foot 2; the presser foot device 1 is installed on the second mounting mechanism 5 of the buttonholer machine 100, and the second mounting mechanism 5 is used to control the lifting and pressing of the floating presser foot 13.

[0086] In this embodiment, the first presser foot 2 and the floating presser foot device 1 are respectively installed on different mechanisms of the buttonhole machine 100, so the first presser foot 2 and the floating presser foot device 1 have different movements. The core function of the first mounting mechanism 4 is to control the movement and lifting of the first presser foot 2. This control capability enables the first presser foot 2 to dynamically adjust its position and pressure according to actual needs during sewing to adapt to fabrics of different thicknesses and characteristics.

[0087] The second mounting mechanism 5 is different from the first mounting mechanism 4. The second mounting mechanism 5 only controls the lifting and pressing action of the floating presser foot device 1. The floating presser foot device 1 can be lifted and pressed to facilitate the placement and handling of fabrics. Compared with the first presser foot 2, the floating presser foot device 1 does not move forward and backward with the first presser foot 2. Therefore, the floating presser foot 13 maintains a certain distance from the machine needle 3 in the forward and backward direction of feeding, and will not move away from or approach the machine needle 3 with the movement of the fabric, start the function of pressing the fabric, and prevent the fabric from moving upward with the random needle 3, so that the thread loop formed by the machine needle 3 remains stable, reducing skipped stitches and thread breakage.

[0088] Please refer to Figure 7 , Figure 7 A schematic diagram of a pulley bracket, a pulley and a track frame provided in an embodiment of the present application.

[0089] In some embodiments, the first mounting mechanism 4 includes: a moving arm 41 ; a track frame 42 fixedly mounted on the moving arm 41 , the track frame 42 is provided with a slide groove 421 , and the first presser foot 2 is mounted on the track frame 42 .

[0090] In some embodiments, the second mounting mechanism 5 includes: a mounting rod 51; a pulley bracket 52, which is fixedly mounted on the mounting rod 51, and the pulley bracket 52 is rotatably mounted with a pulley 53, and the pulley 53 moves along the slide groove 421, so that when the first mounting mechanism 4 controls the movement and lifting of the first presser foot 2, the second mounting mechanism 5 controls the lifting of the floating presser foot 13.

[0091] In this embodiment, the first mounting mechanism 4 is composed of a moving arm 41 and a track frame 42. The moving arm 41 can move in the front-back and up-down directions, and this design enables the first presser foot 2 to move and lift and press. The track frame 42 is fixedly mounted on the moving arm 41, and a slide groove 421 is provided on the track frame 42. The first presser foot 2 is mounted on the track frame 42. Through the movement of the moving arm 41, the track frame 42 can drive the first presser foot 2 to move and lift and press.

[0092] The second mounting mechanism 5 is composed of a mounting rod 51, a pulley bracket 52 and a pulley 53. The mounting rod 51 is circumferentially limited on the buttonhole machine 100 and can only move up and down. The pulley bracket 52 is fixedly mounted on the mounting rod 51, and a pulley 53 is rotatably mounted on the pulley bracket 52. The pulley 53 moves along the slide groove 421 of the track frame 42. This design allows the second mounting mechanism 5 to only control the lifting and pressing action of the floating presser foot 13 when the first mounting mechanism 4 controls the movement and lifting and pressing of the first presser foot 2, thereby avoiding the forward and backward movement of the floating presser foot 13.

[0093] Through this design, the first mounting mechanism 4 and the second mounting mechanism 5 are linked in movement, so that the floating presser foot device 1 is linked with the first presser foot 2. For the floating presser foot device 1, lifting and pressing are retained and movement is avoided, thereby achieving that the floating presser foot 13 maintains a certain distance from the needle 3 in the front and rear directions of feeding.

[0094] The present application also provides a buttonhole machine 100, comprising the above-mentioned presser foot mechanism.

[0095] The buttonhole machine 100 is a type of industrial sewing machine, belonging to a special machine, and is mainly used for processing buttonholes of buttons in various types of clothing. The buttonhole machine 100 also includes other mechanisms necessary for a conventional buttonhole machine 100, such as a body, a base, etc. The buttonhole machine 100 should have all the beneficial effects of the above-mentioned presser foot device 1, which will not be repeated here one by one.

[0096] It should be noted that many of the components mentioned in this application are universal standard parts or components known to those skilled in the art, and their structures and principles can be learned by those skilled in the art through technical manuals or through conventional experimental methods.

[0097] It should be noted that, in this specification, relational terms such as first and second are merely used to distinguish one entity from other entities, but do not necessarily require or imply any actual relationship or order between these entities.

[0098] The above is a detailed introduction to the presser foot device, presser foot mechanism and buttonhole machine provided by the present application. Specific examples are used in this article to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method and core ideas of the present application. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the present application, several improvements and modifications can be made to the present application, and these improvements and modifications also fall within the scope of protection of the claims of the present application.

Claims

1. A presser foot device, used in combination with a first presser foot, wherein the middle portion of the first presser foot is hollowed out and the middle portion of the first presser foot passes through a machine needle, characterized in that: The presser foot device comprises: Install components; A presser foot swing arm, rotatably mounted on the mounting assembly; A floating presser foot is rotatably mounted on the presser foot swing arm, the floating presser foot is located in the first presser foot, a distance is left between the floating presser foot and the needle, and the floating presser foot is used to press the cloth in the first presser foot.

2. The presser foot device according to claim 1, characterized in that: The installation assembly includes: Presser foot mounting base; The presser foot swing arm seat is fixedly mounted on the presser foot mounting base. The presser foot swing arm seat is provided with a rotating shaft. The rotating shaft is sleeved with a sliding bearing. The presser foot swing arm is sleeved on the sliding bearing.

3. The presser foot device according to claim 2, characterized in that: The installation assembly also includes: A torsion spring shaft, fixedly mounted on the presser foot swing arm seat; A torsion spring is fixedly mounted on the torsion spring shaft, and an extended end of the torsion spring abuts against the presser foot swing arm.

4. The presser foot device according to claim 3, characterized in that: The presser foot swing arm is provided with a clamping slot, and the clamping slot abuts against the extended end of the torsion spring.

5. The presser foot device according to claim 2, characterized in that: The presser foot swing arm is provided with a limiting arm, and the limiting arm contacts with the presser foot swing arm seat to limit the rotation angle of the presser foot swing arm relative to the mounting assembly.

6. A presser foot mechanism, characterized in that: The invention comprises a first presser foot and a presser foot device as claimed in any one of claims 1 to 5.

7. The presser foot mechanism according to claim 6, characterized in that: The first presser foot is installed on the first installation mechanism of the buttonholing machine, and the first installation mechanism is used to control the movement and lifting and pressing of the first presser foot; the presser foot device is installed on the second installation mechanism of the buttonholing machine, and the second installation mechanism is used to control the lifting and pressing of the floating presser foot.

8. The presser foot mechanism according to claim 7, characterized in that: The first mounting mechanism comprises: Sports arm; A track frame is fixedly mounted on the moving arm, the track frame is provided with a slide groove, and the first presser foot is mounted on the track frame.

9. The presser foot mechanism according to claim 8, characterized in that: The second mounting mechanism comprises: Mounting rod; A pulley bracket is fixedly mounted on the mounting rod, and a pulley is rotatably mounted on the pulley bracket. The pulley moves along the slide groove, so that when the first mounting mechanism controls the movement and lifting of the first presser foot, the second mounting mechanism controls the lifting of the floating presser foot.

10. A buttonholing machine, characterized in that: It comprises a presser foot mechanism as described in any one of claims 6 to 9.

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