Multi-section cutter structure of keyhole machine

Abstract

The utility model discloses a kind of lock eye machine multi-section cutter structure, belong to sewing machine technical field, including cutter base and cutter seat, connecting shaft is equipped in the cutter base, fixed portion corresponding with the connecting shaft is equipped on the cutter seat, the fixed portion is connected with the connecting shaft and the cutter seat is along the axial direction of the connecting shaft relative to the cutter base sliding, cutter assembly is equipped on the cutter seat, the cutter base is fixedly connected on the work platform of lock eye machine. Connecting shaft can connect cutter seat and cutter base, cutter is installed on the cutter seat, by connecting shaft, cutter seat can produce movement relative to cutter base, so that cutter moves relative to air hammer, so that air hammer acts on different positions of cloth, so as to increase the cloth cutting range of air hammer, that is, the longest length that can cut lock eye is increased, avoid frequent switching air hammer, improve work efficiency.

Description

Technical Field

[0001] This utility model relates to a cutting blade structure, and more specifically, to a multi-segment cutting blade structure for a buttonhole machine. Background Technology

[0002] In the actual use of round-head buttonhole machines, we often encounter the need to sew buttonholes of different lengths within a short period of time. In such cases, the buttonhole length is usually changed by switching the air hammer. However, this process involves switching and adjusting the air hammer, which consumes a significant amount of time and greatly reduces work efficiency.

[0003] For example, Chinese Patent Publication No. CN202492690U, published on October 17, 2012, describes a utility model entitled "Fabric Cutting Device for a Round-Headed Buttonhole Machine." This device includes a cutter fixed to a machine base, a pneumatic hammer transmission mechanism within the machine head, and a pneumatic hammer positioned above the cutter and capable of vertical movement. The pneumatic hammer transmission mechanism comprises a pneumatic hammer arm rotatably mounted within the machine head and a pneumatic hammer rod rotatably mounted within the machine head. A pneumatic hammer assembly is connected to the first end of the pneumatic hammer arm, and the pneumatic hammer rod is connected to the second end via a connecting rod. A drive mechanism is connected to the end of the pneumatic hammer rod. This fabric cutting device uses a cylinder drive, and the pneumatic hammer assembly moves up and down via the pneumatic hammer transmission mechanism within the machine head. It has the advantages of simple structure, convenient installation, and easy adjustment. However, when sewing buttonholes of different lengths, switching and adjusting the pneumatic hammer is required, which consumes considerable time and results in low work efficiency. Utility Model Content

[0004] This invention overcomes the problem of low work efficiency of existing buttonhole machines when sewing buttonholes of different lengths. It provides a multi-segment cutting structure for buttonhole machines. This solution can increase the maximum length of buttonholes that the buttonhole machine can cut, has a wider range of buttonhole cutting lengths, avoids frequent switching of air hammers, and improves work efficiency.

[0005] To solve the above-mentioned technical problems, this utility model adopts the following technical solution: a multi-segment cutting blade structure for a buttonhole machine, including a cutting blade base and a cutting blade holder. A connecting shaft is provided inside the cutting blade base, and a fixing part corresponding to the connecting shaft is provided on the cutting blade holder. The fixing part is connected to the connecting shaft, and the cutting blade holder slides relative to the cutting blade base along the axial direction of the connecting shaft. A cutting blade assembly is provided on the cutting blade holder, and the cutting blade base is fixedly connected to the working platform of the buttonhole machine. The connecting shaft connects the cutting blade holder and the cutting blade base. A cutting blade is installed on the cutting blade holder. Through the connecting shaft, the cutting blade holder can move relative to the cutting blade base, thereby causing the cutting blade to move relative to the air hammer. This allows the air hammer to act on different positions of the fabric, thus increasing the cutting range of the air hammer, i.e., increasing the maximum length that can be cut into a buttonhole, avoiding frequent switching of the air hammer, and improving work efficiency.

[0006] Preferably, the cutter assembly includes a cutter holder with a cutter mounting portion perpendicular to the upper surface of the cutter holder. The cutter holder secures the cutter structure, and the cutter can be mounted on the cutter mounting portion.

[0007] Preferably, the cutter mounting base further includes a cutter surface, which is adjacent to and perpendicular to the cutter mounting portion, and a first suction hole is provided on the cutter surface. The first suction hole is located at the position of the cutter mounting portion, close to the cutter position, so that when the cutter generates waste material while cutting the fabric, the waste material can be removed in a timely manner to prevent waste material accumulation.

[0008] Preferably, the top of the first suction hole is an elongated oval groove, and the bottom is a through-hole structure with a gradually decreasing diameter. The first suction hole penetrates the cutter fixing seat. The elongated oval design of the top of the first suction hole facilitates the entry of waste fabric into the first suction hole, making waste recycling easier.

[0009] Preferably, the cutter base is provided with a second suction hole, which corresponds to the position of the first suction hole. When the cutter seat slides on the cutter base, the first suction hole and the second suction hole can overlap or be offset. When the first suction hole and the second hole are connected, the waste generated from cutting the fabric can be discharged, avoiding waste accumulation.

[0010] Preferably, the cutter holder further includes an inclined surface with a suction hole that communicates with the first material suction hole. The suction hole can also absorb waste material and guide it into the first material suction hole.

[0011] Preferably, the connecting shaft is fixedly connected to the fixing part, and a cylinder is provided inside the cutter base. The connecting shaft passes through the cylinder and forms a first air chamber and a second air chamber inside the cylinder. A sealing block is provided between the first air chamber and the second air chamber and on the connecting shaft. The sealing block is equivalent to a piston structure. When the pressure between the first air chamber and the second air chamber is different, the sealing block will move inside the cylinder, thereby realizing the relative movement between the cutter holder and the cutter base.

[0012] Preferably, a first air inlet and a second air inlet are provided at the bottom of the cutter base corresponding to the first air chamber and the second air chamber. The first air inlet and the second air inlet are used to ventilate the first air chamber and the second air chamber, change the size of the first air chamber and the second air chamber, and realize the relative movement between the cutter base and the cutter holder.

[0013] Preferably, the connecting shaft is threadedly connected to the fixing part, and the connecting shaft is also connected to the rotating rod of the cutter base. The movement between the cutter base and the cutter seat can be controlled by threaded transmission, achieving the same effect.

[0014] Preferably, the cutter base contains a cylinder, and the connecting shaft is the telescopic rod of the cylinder, which is fixedly connected to the fixing part. The movement between the cutter base and the cutter holder can be controlled by the cylinder, achieving the same effect.

[0015] Compared with the prior art, the beneficial effects of this utility model are: (1) It can increase the range of cloth cutting length of the air hammer, increase the maximum length of keyhole cutting, and avoid switching air hammers in some working conditions, thus improving work efficiency; (2) The structure is simple, the automatic control is convenient to use; (3) It has a good waste recycling effect and improves the waste utilization rate. Attached Figure Description

[0016] Figure 1 This is an isometric view of the present invention.

[0017] Figure 2 This is an exploded view of the present invention.

[0018] Figure 3 This is a schematic diagram of the cutter holder of this utility model.

[0019] Figure 4 This is a schematic diagram of the internal structure of the cutter holder of this utility model.

[0020] Figure 5 This is a cross-sectional view of the present invention along the connecting axis.

[0021] Figure 6 This is a schematic diagram of another embodiment of the present invention.

[0022] Figure 7 This is a schematic diagram of the keyhole cutting method using a pneumatic hammer and a cutter according to the present invention.

[0023] In the diagram: 1. Cutter base, 2. Cutter seat, 3. Connecting shaft, 4. Fixing part, 5. Cutter fixing seat, 5.1. Cutter mounting part, 5.2. Cutter surface, 5.3. Inclined surface, 6. First suction hole, 7. Second suction hole, 8. Air suction hole, 9. Cylinder body, 10. First air chamber, 11. Second air chamber, 12. Sealing block, 13. First air port, 14. Second air port, 15. Cylinder, 16. Recessed step, 17. Mounting hole, 18. Connecting hole, 19. Through hole, 20. Cutter, 21. Air hammer, 22. Keyhole, 23. Material passage hole. Detailed Implementation

[0024] The technical solution of this utility model will be further described in detail below through specific embodiments and in conjunction with the accompanying drawings.

[0025] Example 1: As Figures 1 to 5The multi-segment cutting structure of the buttonhole machine shown includes a cutting blade seat 2 and a cutting blade base 1. The cutting blade seat 2 is arranged above the cutting blade base 1. The bottom of the cutting blade seat 2 has an n-shaped structure, and the cutting blade base 1 is located inside the n-shaped bottom of the cutting blade seat 2. Specifically, the cutting blade base 1 is a rectangular structure. There are recessed steps 16 on both sides of the cutting blade base 1, and mounting holes 17 are provided on the recessed steps 16. There are three sets of mounting holes 17. The cutting blade base 1 is fixedly connected to the working platform of the buttonhole machine through the mounting holes 17. The bottom of the cutter base 2 has two N-shaped fixing parts 4, which are connecting plate structures. Each fixing part 4 has a connecting hole 18. Similarly, the cutter base 1 has through holes 19 corresponding to the two sets of connecting holes 18. The through holes 19 are coaxially arranged with the two sets of connecting holes 18. A connecting shaft 3 is arranged inside the through hole 19 of the cutter base 1. Both ends of the connecting shaft 3 protrude from the sides of the through hole 19 and connect to the connecting holes 18 of the fixing parts 4 at the bottom of the cutter base 2. This allows the cutter base 2 to move relative to the cutter base 1 under the action of the connecting shaft 3, and the direction of movement of the cutter base 2 is parallel to the axis of the connecting shaft 3. In other words, when the buttonhole machine is working, the fabric on the cutter base 2 moves along with the movement of the cutter base 2 (reciprocating motion), thus forming a woven buttonhole 22 on the fabric.

[0026] Furthermore, a cutter assembly is provided on the cutter holder 2, the cutter assembly including a cutter fixing seat 5 and a cutter 20 (only) Figure 7 As shown, the cutter mounting base 5 is a structure arranged on the upper surface of the cutter holder 2 for mounting the cutter 20. The cutter mounting base 5 includes a cutter mounting part 5.1, a cutter positioning surface 5.2, and an inclined surface 5.3. The cutter mounting part 5.1 is a plate-like structure perpendicular to the upper surface of the cutter holder 2 and is used to mount the cutter 20. The cutter mounting part 5.1, the cutter positioning surface 5.2, the inclined surface 5.3, and the upper surface of the cutter holder 2 are arranged in a stepped manner, with the cutter mounting part 5.1 at the top, followed by the cutter positioning surface 5.2, the inclined surface 5.3, and the upper surface of the cutter holder 2. The cutter mounting part 5.1 is provided with three sets of positioning holes for cutter limiting plates (not shown in the figure). The cutter limiting plates can limit the position of the cutter 20 to ensure the positional accuracy of the cutter 20. A first suction hole 6 is provided on the cutter surface 5.2, which longitudinally penetrates the cutter 20 fixing base and connects to the n-shaped area at the bottom of the cutter base 2. A second suction hole 7 is provided on the cutter base 1, which is larger than the first suction hole 6 and is a rectangular through hole. Waste material generated when the cutter 20 cuts the fabric falls into the first suction hole 6 and then into the second suction hole 7, thus achieving waste material collection and discharge.

[0027] It should be noted that the top of the first suction hole 6 is an elongated oval groove, and the bottom is a tapered hole with a gradually decreasing diameter from top to bottom. The elongated oval design at the top facilitates the entry of fabric into the first suction hole 6. When the cutter seat 2 moves relative to the cutter base 1, the first suction hole 6 and the second suction hole 7 will overlap and connect or be staggered and closed. An air suction hole 8 is also provided on the inclined surface 5.3. The air suction hole 8 is arranged at an angle, specifically perpendicular to the inclined surface 5.3, and its interior is connected to the top of the first suction hole 6. A material passage hole 23 is also provided on the surface of the cutter seat 2. When the cutter seat 2 and the cutter base 1 move relative to each other, the material passage hole 23 can also overlap or be staggered with the second suction hole 7 on the cutter base 1. The first suction hole 6, the air suction hole 8, and the material passage hole 23 can all pass the waste generated during the fabric cutting process into the second suction hole 7, and then recycle the waste.

[0028] Furthermore, the connecting shaft 3 forms a cylinder 9 structure within the through hole 19 of the cutter base 1. Specifically, sealing rubber rings and other structures are provided on the connecting shaft 3 at both ends of the cutter base 1, so that the inside of the through hole 19 and the connecting shaft 3 are sealed. The radial dimension of the through hole 19 is larger than the radial dimension of the connecting shaft 3, thus forming a cylinder 9 structure inside the cutter base 1. A sealing block 12 is also provided on the connecting shaft 3 and inside the cylinder 9. The sealing block 12 is also composed of sealing rubber rings, sealing rings, and other structures. Through the action of the sealing block 12, the inside of the cylinder 9 is divided into a first air chamber 10 and a second air chamber 11. The bottom of the first air chamber 10 and the second air chamber 11 are respectively provided with a first air port 13 and a second air port 14. The two ends of the connecting shaft 3 are respectively fixedly connected to the two fixing parts 4 on the bottom of the cutter base 2. When air is supplied to the first air inlet 13, the volume of the first air chamber 10 increases, and the volume of the second air chamber 11 decreases. Since the cutter base 1 is fixed, the cutter base is moved to the right by the connecting shaft 3. Figure 5 (as shown in the orientation); Conversely, when air is supplied to the second air inlet 14, the cutter holder 2 will move to the left, thereby realizing the movement of the cutter 20 relative to the work platform.

[0029] like Figure 7 As shown, when the length of the keyhole 22 to be cut exceeds the length of the air hammer 21, the cutter 20 is moved so that its rounded head avoids the air hammer 21 to prevent damage to the fabric. Furthermore, the algorithm program moves the sewing platform so that the uncut fabric is positioned directly below the air hammer 21, allowing for precise cutting when the air hammer 21 falls again. This allows for cutting keyholes 22 to a length twice the length of the air hammer 21, thus satisfying the need for cutting keyholes 22 over a longer range without frequent switching of the air hammer 22, thereby improving work efficiency.

[0030] Example 2: Figures 1 to 5The multi-segment cutting structure of the buttonhole machine shown includes a cutting blade seat 2 and a cutting blade base 1. The cutting blade seat 2 is arranged above the cutting blade base 1. The bottom of the cutting blade seat 2 has an n-shaped structure, and the cutting blade base 1 is located inside the n-shaped bottom of the cutting blade seat 2. Specifically, the cutting blade base 1 is a rectangular structure. There are recessed steps 16 on both sides of the cutting blade base 1, and mounting holes 17 are provided on the recessed steps 16. There are three sets of mounting holes 17. The cutting blade base 1 is fixedly connected to the working platform of the buttonhole machine through the mounting holes 17. The bottom of the cutter base 2 has two N-shaped fixing parts 4, which are connecting plate structures. Each fixing part 4 has a connecting hole 18. Similarly, the cutter base 1 has through holes 19 corresponding to the two sets of connecting holes 18. The through holes 19 are coaxially arranged with the two sets of connecting holes 18. A connecting shaft 3 is arranged inside the through hole 19 of the cutter base 1. Both ends of the connecting shaft 3 protrude from the sides of the through hole 19 and connect to the connecting holes 18 of the fixing parts 4 at the bottom of the cutter base 2. This allows the cutter base 2 to move relative to the cutter base 1 under the action of the connecting shaft 3, and the direction of movement of the cutter base 2 is parallel to the axis of the connecting shaft 3. In other words, when the buttonhole machine is working, the fabric on the cutter base 2 moves along with the movement of the cutter base 2 (reciprocating motion), thus forming a woven buttonhole 22 on the fabric.

[0031] Furthermore, a cutter assembly is provided on the cutter holder 2, the cutter assembly including a cutter fixing seat 5 and a cutter 20 (only) Figure 7 As shown, the cutter mounting base 5 is a structure arranged on the upper surface of the cutter holder 2 for mounting the cutter 20. The cutter mounting base 5 includes a cutter mounting part 5.1, a cutter positioning surface 5.2, and an inclined surface 5.3. The cutter mounting part 5.1 is a plate-like structure perpendicular to the upper surface of the cutter holder 2 and is used to mount the cutter 20. The cutter mounting part 5.1, the cutter positioning surface 5.2, the inclined surface 5.3, and the upper surface of the cutter holder 2 are arranged in a stepped manner, with the cutter mounting part 5.1 at the top, followed by the cutter positioning surface 5.2, the inclined surface 5.3, and the upper surface of the cutter holder 2. The cutter mounting part 5.1 is provided with three sets of positioning holes for cutter limiting plates (not shown in the figure). The cutter limiting plates can limit the position of the cutter 20 to ensure the positional accuracy of the cutter 20. A first suction hole 6 is provided on the cutter surface 5.2, which longitudinally penetrates the cutter 20 fixing base and connects to the n-shaped area at the bottom of the cutter base 2. A second suction hole 7 is provided on the cutter base 1, which is larger than the first suction hole 6 and is a rectangular through hole. Waste material generated when the cutter 20 cuts the fabric falls into the first suction hole 6 and then into the second suction hole 7, thus achieving waste material collection and discharge.

[0032] It should be noted that the top of the first suction hole 6 is an elongated oval groove, and the bottom is a tapered hole with a gradually decreasing diameter from top to bottom. The elongated oval design at the top facilitates the entry of fabric into the first suction hole 6. When the cutter seat 2 moves relative to the cutter base 1, the first suction hole 6 and the second suction hole 7 will overlap and connect or be staggered and closed. An air suction hole 8 is also provided on the inclined surface 5.3. The air suction hole 8 is arranged at an angle, specifically perpendicular to the inclined surface 5.3, and its interior is connected to the top of the first suction hole 6. A material passage hole 23 is also provided on the surface of the cutter seat 2. When the cutter seat 2 and the cutter base 1 move relative to each other, the material passage hole 23 can also overlap or be staggered with the second suction hole 7 on the cutter base 1. The first suction hole 6, the air suction hole 8, and the material passage hole 23 can all pass the waste generated during the fabric cutting process into the second suction hole 7, and then recycle the waste.

[0033] Furthermore, the connecting shaft 3 is located inside the through hole 19 of the cutter base 1. Specifically, the radial dimension of the through hole 19 is larger than the radial dimension of the connecting shaft 3. The connecting shaft 3 is rotatably connected to the through hole 9 through a bearing. Both ends of the connecting shaft 3 are threaded and threadedly connected to the fixing part 4 at the bottom of the cutter base 2. Since the cutter base 1 is a fixed structure, when the connecting shaft 3 rotates, a threaded transmission is formed between the cutter base 2 and the connecting shaft 3, thereby driving the cutter base 2 to move relative to the cutter base 1, that is, driving the cutter 20 to move. The direction of movement of the cutter base 2 is parallel to the axial direction of the connecting shaft 3.

[0034] like Figure 7 As shown, when the length of the keyhole 22 to be cut exceeds the length of the air hammer 21, the cutter 20 is moved so that its rounded head avoids the air hammer 21 to prevent damage to the fabric. Furthermore, the algorithm program moves the sewing platform so that the uncut fabric is positioned directly below the air hammer 21, allowing for precise cutting when the air hammer 21 falls again. This allows for cutting keyholes 22 to a length twice the length of the air hammer 21, thus satisfying the need for cutting keyholes 22 over a longer range without frequent switching of the air hammer 22, thereby improving work efficiency.

[0035] Example 3: As Figures 1 to 4 as well as Figure 6The multi-segment cutting structure of the buttonhole machine shown includes a cutting blade seat 2 and a cutting blade base 1. The cutting blade seat 2 is arranged above the cutting blade base 1. The bottom of the cutting blade seat 2 has an n-shaped structure, and the cutting blade base 1 is located inside the n-shaped bottom of the cutting blade seat 2. Specifically, the cutting blade base 1 is a rectangular structure. There are recessed steps 16 on both sides of the cutting blade base 1, and mounting holes 17 are provided on the recessed steps 16. There are three sets of mounting holes 17. The cutting blade base 1 is fixedly connected to the working platform of the buttonhole machine through the mounting holes 17. The bottom of the cutter base 2 has two N-shaped fixing parts 4, which are connecting plate structures. One of the fixing parts 4 has a connecting hole 18. Similarly, a cylinder structure is set inside the cutter base 1. The output end of the cylinder is equipped with a connecting shaft 3, which is equivalent to a telescopic rod structure. The telescopic end of the connecting shaft 3 is fixedly connected to the connecting hole on the fixing part 4, so that the cutter base 2 can move relative to the cutter base 1 under the telescopic action of the connecting shaft 3. The direction of movement of the cutter base 2 is parallel to the axis of the connecting shaft 3. That is to say, when the buttonhole machine is working, the fabric on the cutter base 2 will move together with the movement of the cutter base 2 (reciprocating motion), thereby forming a woven buttonhole 22 on the fabric.

[0036] Furthermore, a cutter assembly is provided on the cutter holder 2, the cutter assembly including a cutter fixing seat 5 and a cutter 20 (only) Figure 7 As shown, the cutter mounting base 5 is a structure arranged on the upper surface of the cutter holder 2 for mounting the cutter 20. The cutter mounting base 5 includes a cutter mounting part 5.1, a cutter positioning surface 5.2, and an inclined surface 5.3. The cutter mounting part 5.1 is a plate-like structure perpendicular to the upper surface of the cutter holder 2 and is used to mount the cutter 20. The cutter mounting part 5.1, the cutter positioning surface 5.2, the inclined surface 5.3, and the upper surface of the cutter holder 2 are arranged in a stepped manner, with the cutter mounting part 5.1 at the top, followed by the cutter positioning surface 5.2, the inclined surface 5.3, and the upper surface of the cutter holder 2. The cutter mounting part 5.1 is provided with three sets of positioning holes for cutter limiting plates (not shown in the figure). The cutter limiting plates can limit the position of the cutter 20 to ensure the positional accuracy of the cutter 20. A first suction hole 6 is provided on the cutter surface 5.2, which longitudinally penetrates the cutter 20 fixing base and connects to the n-shaped area at the bottom of the cutter base 2. A second suction hole 7 is provided on the cutter base 1, which is larger than the first suction hole 6 and is a rectangular through hole. Waste material generated when the cutter 20 cuts the fabric falls into the first suction hole 6 and then into the second suction hole 7, thus achieving waste material collection and discharge.

[0037] It should be noted that the top of the first suction hole 6 is an elongated oval groove, and the bottom is a tapered hole with a gradually decreasing diameter from top to bottom. The elongated oval design at the top facilitates the entry of fabric into the first suction hole 6. When the cutter seat 2 moves relative to the cutter base 1, the first suction hole 6 and the second suction hole 7 will overlap and connect or be staggered and closed. An air suction hole 8 is also provided on the inclined surface 5.3. The air suction hole 8 is arranged at an angle, specifically perpendicular to the inclined surface 5.3, and its interior is connected to the top of the first suction hole 6. A material passage hole 23 is also provided on the surface of the cutter seat 2. When the cutter seat 2 and the cutter base 1 move relative to each other, the material passage hole 23 can also overlap or be staggered with the second suction hole 7 on the cutter base 1. The first suction hole 6, the air suction hole 8, and the material passage hole 23 can all pass the waste generated during the fabric cutting process into the second suction hole 7, and then recycle the waste.

[0038] like Figure 7 As shown, when the length of the keyhole 22 to be cut exceeds the length of the air hammer 21, the cutter 20 is moved so that its rounded head avoids the air hammer 21 to prevent damage to the fabric. Furthermore, the algorithm program moves the sewing platform so that the uncut fabric is positioned directly below the air hammer 21, allowing for precise cutting when the air hammer 21 falls again. This allows for cutting keyholes 22 to a length twice the length of the air hammer 21, thus satisfying the need for cutting keyholes 22 over a longer range without frequent switching of the air hammer 22, thereby improving work efficiency.

Claims

1. A multi-segment cutting blade structure for a buttonhole machine, characterized in that, The device includes a cutter base and a cutter holder. The cutter base has a connecting shaft inside, and the cutter holder has a fixing part corresponding to the connecting shaft. The fixing part is connected to the connecting shaft, and the cutter holder slides relative to the cutter base along the axial direction of the connecting shaft. The cutter holder has a cutter assembly, and the cutter base is fixedly connected to the working platform of the buttonhole machine.

2. The multi-segment cutting structure of a buttonhole machine according to claim 1, characterized in that, The cutter assembly includes a cutter holder, on which a cutter mounting portion is provided, the cutter mounting portion being perpendicular to the upper surface of the cutter holder.

3. The multi-segment cutting structure of a buttonhole machine according to claim 2, characterized in that, The cutter fixing base also includes a cutter surface, which is adjacent to and perpendicular to the cutter mounting part, and a first suction hole is provided on the cutter surface.

4. The multi-segment cutting structure of a buttonhole machine according to claim 3, characterized in that, The first suction hole has an elongated oval groove at the top and a through hole structure with a gradually decreasing diameter at the bottom, and the first suction hole penetrates the cutter fixing seat.

5. The multi-segment cutting structure of a buttonhole machine according to claim 4, characterized in that, The cutter base is provided with a second suction hole, which corresponds to the position of the first suction hole. When the cutter base slides on the cutter base, the first suction hole and the second suction hole can overlap or be offset.

6. A multi-segment cutting structure for a buttonhole machine according to any one of claims 3 to 5, characterized in that, The cutter holder also includes an inclined surface, on which an air suction hole is provided, and the air suction hole is connected to the first material suction hole.

7. A multi-segment cutting structure for a buttonhole machine according to any one of claims 1 to 5, characterized in that, The connecting shaft is fixedly connected to the fixing part. The cutter base is provided with a cylinder. The connecting shaft passes through the cylinder and forms a first air chamber and a second air chamber in the cylinder. A sealing block is provided between the first air chamber and the second air chamber and on the connecting shaft.

8. The multi-segment cutting structure of a buttonhole machine according to claim 7, characterized in that, A first air inlet and a second air inlet are provided at the bottom of the cutter base to correspond to the first air chamber and the second air chamber.

9. A multi-segment cutting structure for a buttonhole machine according to any one of claims 1 to 5, characterized in that, The connecting shaft is threadedly connected to the fixing part, and the connecting shaft is connected to the rotating rod of the cutter base.

10. A multi-segment cutting structure for a buttonhole machine according to any one of claims 1 to 5, characterized in that, The cutter base contains a cylinder, and the connecting shaft is the telescopic rod of the cylinder. The connecting shaft is fixedly connected to the fixing part.

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