Cutter position adjusting mechanism, using method and round-head buttonholing sewing machine

Abstract

The invention discloses a cutter position adjusting mechanism, a using method and a round head buttonholing sewing machine, and relates to the field of round head buttonholing sewing machines, the cutter position adjusting mechanism comprises a base, a cutter seat, a driving assembly and a locking assembly, the cutter seat is arranged on the base, a cutter is arranged on the cutter seat in a sliding mode, and the cutter slides in the direction of a cutting edge; the driving assembly is arranged on the base, and the driving assembly is used for driving the cutter to slide on the cutter holder in the direction of the cutting edge; and the locking assembly is arranged on the base, and the locking assembly is used for locking the position of the cutter. The invention further provides a using method of the cutter position adjusting mechanism and the round-head buttonholing sewing machine comprising the cutter position adjusting mechanism and an air hammer. The round-head buttonhole sewing machine has the advantages that the position of the cutter can be conveniently adjusted according to the needed buttonhole length, the cutter can be reliably locked, and the round-head buttonhole sewing machine can meet the machining requirements of different buttonhole lengths.

Description

Technical Field

[0001] The present invention relates to the technical field of eyelet buttonhole sewing machines, and more particularly to a cutter position adjustment mechanism, a use method and an eyelet buttonhole sewing machine. Background Art

[0002] In the garment manufacturing industry, eyelet buttonhole sewing machines are essential equipment. After sewing, they must cut the fabric to create buttonholes for subsequent button assembly. With the development of the garment industry, the demand for efficiency and versatility in sewing machines is increasing. Garment factories process a large number of garments with varying styles and buttonhole lengths daily, posing a significant challenge to the fabric cutting capabilities of sewing machines. An efficient and versatile fabric cutting method can significantly improve production efficiency and reduce costs, playing a crucial role in enhancing the competitiveness of the entire garment industry.

[0003] To address the problem of cutting cloth for buttonholes of varying lengths on eyelet buttonhole sewing machines, two approaches are commonly used. One involves manually changing the length of the pneumatic hammer to match the length of the buttonhole. The other involves multiple cuts, which adjust the length of the buttonhole to the desired length.

[0004] However, the two aforementioned cloth cutting methods have significant drawbacks. Manually changing between different-sized pneumatic hammers is cumbersome and lacks versatility. In domestic garment factories, the process of sewing clothing with buttonholes of varying lengths requires frequent switching back and forth throughout the day. Frequent manual replacement of pneumatic hammers consumes significant time and manpower, significantly impacting work hours. While multiple cuts compensate for the drawback of frequent cutter changes, each stitch requires multiple cuts, increasing processing time. This, in the long run, also impacts work hours and reduces production efficiency.

[0005] In summary, how to realize a cloth cutting method that is simple to operate, highly adaptable, and can automatically adjust the cloth cutting length is a problem that needs to be urgently solved by those skilled in the art. Summary of the Invention

[0006] In view of this, the purpose of the present invention is to provide a cutter position adjustment mechanism, a method of use and a round head buttonhole sewing machine, which effectively realizes automatic adjustment of the cut cloth length and is easy to operate and has strong adaptability.

[0007] In order to achieve the above object, the present invention provides the following technical solutions:

[0008] A cutter position adjustment mechanism, comprising:

[0009] base;

[0010] A cutter seat is provided on the base, a cutter is slidably provided on the cutter seat, and the cutter slides along the blade direction;

[0011] A driving assembly is provided on the base, and is used for driving the cutter to slide on the cutter seat along the direction of the blade;

[0012] A locking assembly is provided on the base, and is used to lock the position of the cutter.

[0013] Preferably, the drive assembly includes:

[0014] an adjusting rack fixedly disposed on one side of the cutter;

[0015] A rotating motor is fixedly arranged on the cutter seat on one side of the adjusting rack;

[0016] An adjusting gear is arranged on the output shaft of the rotating motor, and the adjusting gear is meshed with the adjusting rack.

[0017] Preferably, a first threaded hole is provided on one side of the cutter, a first through hole is provided on the adjustment rack to cooperate with the first threaded hole, and the adjustment rack is fixed to one side of the cutter by a first fixing screw cooperating with the first threaded hole.

[0018] Preferably, a mounting plate that fits with the cutter seat is provided on the side of the rotating motor close to the cutter seat, and the cutter seat is provided with a second threaded hole on the mounting plate, and a second through hole that cooperates with the second threaded hole is provided on the mounting plate, and the mounting plate is fixed to the cutter seat by a second fixing screw that cooperates with the second threaded hole.

[0019] Preferably, the locking assembly includes:

[0020] A pressure plate, wherein a connecting rod is provided between the pressure plate and the cutter seat, and both ends of the connecting rod are hinged to the pressure plate and the cutter seat respectively;

[0021] A lifting member, wherein the lifting end of the lifting member is hinged to one end of the pressing plate, so that the pressing plate is away from the end of the lifting member and is pressed against the cutter.

[0022] Preferably, a limiting groove is provided on one side of the cutter close to the pressure plate, and a clamping block that cooperates with the limiting groove is formed on one end of the pressure plate away from the lifting member, and the surface of the clamping block abuts against the inner wall of the limiting groove.

[0023] Preferably, the lifting member includes a lifting cylinder arranged on the base and a lifting rod arranged at the output end of the lifting cylinder, and one end of the lifting rod away from the lifting cylinder is hinged to the pressure plate.

[0024] A method for using a cutter position adjustment mechanism, applied to the above-mentioned cutter position adjustment mechanism, the method comprising:

[0025] Determine the cutter movement distance based on the required buttonhole length;

[0026] Controlling the locking assembly to unlock the cutter;

[0027] Controlling the driving assembly to move the cutter to a designated position;

[0028] The locking assembly is controlled to lock the cutter position again.

[0029] A round head buttonhole sewing machine comprises the above-mentioned cutter position adjustment mechanism and an air hammer arranged in cooperation with the cutter.

[0030] Preferably, the impact axis of the air hammer is perpendicular to the moving direction of the cutter, and the stroke of the air hammer covers the entire movable range of the cutter;

[0031] When the cutter moves to the position of the longest keyhole length, the impact axis of the air hammer is aligned with the end of the cutter.

[0032] The cutter position adjustment mechanism provided by the present invention controls the drive assembly to drive the cutter to a specified position according to the desired buttonhole length. The locking assembly then secures the cutter in place, thereby achieving adjustment of the buttonhole length. This mechanism allows the cutter position to be adjusted to suit different buttonhole lengths without the need for manual replacement of the air hammer or multiple cuts, improving work efficiency and enabling control of the thread length after sewing.

[0033] The further solutions provided in this application can also achieve the following beneficial technical effects:

[0034] The thread end at the buttonhole is always in one position, and the scissors cut the thread in a fixed position, which can keep the thread end of the buttonhole short. Combined with the suction device, the thread end can be kept clean-free. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are merely embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0036] Figure 1 Schematic diagram of the structure of the cutter position adjustment mechanism in this embodiment;

[0037] Figure 2 is a side view of the cutter position adjustment mechanism in this embodiment;

[0038] Figure 3 This is a schematic diagram of the cutter position adjustment mechanism in the released state in this embodiment;

[0039] Figure 4 This is a schematic diagram of the locked state of the cutter position adjustment mechanism in this embodiment;

[0040] Figure 5 Schematic diagram of the optimal thread trimming position in this embodiment;

[0041] Figure 6 This is a schematic diagram of the longest keyhole length in this embodiment;

[0042] Figure 7 This is a schematic diagram of the shortest keyhole length in this embodiment;

[0043] Figure 8 This is a diagram showing the distribution of buttonhole lengths in this embodiment.

[0044] Figures 1-8 , the reference numerals include:

[0045] 1. Pneumatic hammer; 2. Cutter; 3. Pressing plate; 4. First fixing screw; 5. Cutter seat; 6. First hinge axis; 7. Second hinge axis; 8. Third hinge axis; 9. Lifting rod; 10. Air pipe; 11. Lifting cylinder; 12. Rotating motor; 13. Adjusting gear; 14. Adjusting rack; 15. Connecting rod; 16. Second fixing screw; 17. Limiting slot

[0046] 21. First tabletop; 22. Second tabletop; 23. Scissor assembly; 31. Residual thread. DETAILED DESCRIPTION

[0047] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0048] Unless otherwise defined, the technical or scientific terms used in this application shall have the usual meanings understood by persons of ordinary skill in the field to which the invention belongs. The words "first", "second" and similar terms used in the present invention do not indicate any order, quantity or importance. Words such as "connected" or "connected" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship may also change accordingly. The embodiments of the present application disclose a cutter position adjustment mechanism, a method of use and a round head buttonhole sewing machine.

[0049] The core of the present invention is to provide a cutter position adjustment mechanism.

[0050] Another core of the present invention is to provide a method for using the cutter position adjustment mechanism, which is applied to the above-mentioned cutter position adjustment mechanism.

[0051] Another core of the present invention is to provide an eyelet buttonhole sewing machine, comprising the above-mentioned cutter position adjustment mechanism.

[0052] Please refer to Figure 1 .

[0053] The cutter position adjustment mechanism provided by the present invention includes a base, a cutter seat 5, a drive assembly and a locking assembly. The cutter seat 5 is arranged on the base, and a cutter 2 is slidably arranged on the cutter seat 5, and the cutter 2 slides along the blade direction; the drive assembly is arranged on the base, and the drive assembly is used to drive the cutter 2 to slide on the cutter seat 5 along the blade direction; the locking assembly is arranged on the base, and the locking assembly is used to lock the position of the cutter 2.

[0054] Specifically, the base is a structure similar to a mounting plate, located at the cutter mounting position of a round-head buttonhole sewing machine. It is used to provide an installation station for the cutter position adjustment mechanism. The cutter seat 5, drive assembly, and locking assembly are all fixedly mounted on the base. The cutter 2 is slidably mounted on the cutter seat 5. The connection between the two can be achieved by providing a slide groove at the top of the cutter seat 5 and a slider at the bottom of the cutter 2 that cooperates with the slide groove to enable the cutter 2 to slide on the cutter seat 5. The sliding direction is along the direction of the blade of the cutter 2. In other words, adjusting the position of the cutter 2 is essentially adjusting the overlapping area between the cutter 2 and the air hammer 1, thereby adjusting the buttonhole length.

[0055] The driving assembly is used to drive the cutter 2 to slide on the cutter seat 5, wherein the driving assembly can be driven by an electric push rod, an electric slide rail, a gear rack, etc., and one of the structures will be described in detail below.

[0056] The locking assembly is used to limit and lock the adjusted cutter 2 to prevent the position of the cutter 2 from shifting on the cutter seat 5 during sewing. The locking assembly can adopt a latch limit, a card limit, etc. One of the feasible methods will be described in detail below.

[0057] The aforementioned cutter position adjustment mechanism controls the drive assembly to drive the cutter 2 to a specified position based on the desired buttonhole length. The locking assembly then secures the cutter 2 in place, thereby achieving adjustment of the buttonhole length. This mechanism allows the cutter position to be adjusted to suit different buttonhole lengths, eliminating the need for manual replacement of the air hammer or multiple cuts, improving work efficiency and enabling control of the buttonhole thread length after sewing.

[0058] The following is a more detailed introduction to the cutter position adjustment mechanism, usage method and eyelet buttonhole sewing machine provided by the present invention in conjunction with the accompanying drawings and specific embodiments.

[0059] In a specific embodiment, reference Figure 1 The driving assembly includes an adjusting rack 14, a rotating motor 12 and an adjusting gear 13. The adjusting rack 14 is fixedly arranged on one side of the cutter 2, the rotating motor 12 is fixedly arranged on the cutter seat 5 on one side of the adjusting rack 14, and the adjusting gear 13 is arranged on the output shaft of the rotating motor 12, and the adjusting gear 13 is engaged with the adjusting rack 14.

[0060] Specifically, the rotating motor 12 can be fixed on the cutter seat 5 or on the base. The output shaft of the rotating motor 12 is arranged vertically upward, and an adjusting gear 13 is sleeved on the end of the output shaft. The adjusting gear 13 is fixed to the output shaft of the rotating motor 12 so that the rotating motor 12 drives the adjusting gear 13 to rotate.

[0061] An adjusting rack 14 is provided on the side of the cutter 2 close to the adjusting gear 13. The adjusting rack 14 is arranged along the sliding direction of the cutter 2, and the adjusting rack 14 and the adjusting gear 13 are engaged with each other, so that the rotating motor 12 drives the adjusting gear 13 to rotate, and then drives the adjusting rack 14 to move back and forth, realizing the conversion of rotation into linear motion, thereby realizing the driving of the cutter 2.

[0062] Based on any of the above embodiments, Figure 1 A first threaded hole is provided on one side of the cutter 2, and a first through hole is provided on the adjusting rack 14 to cooperate with the first threaded hole. The adjusting rack 14 is fixed to one side of the cutter 2 by a first fixing screw 4 to cooperate with the first threaded hole.

[0063] Specifically, in order to achieve the fixation between the adjustment rack 14 and the cutter 2, at least two first through holes can be relatively opened on the adjustment rack 14, and a first threaded hole corresponding to the first through hole can be opened at the corresponding position of the cutter 2. The adjustment rack 14 can be detachably fixed to one side of the cutter 2 by passing the first fixing screw 4 through the first through hole and the first threaded hole in sequence. At the same time, other detachable fixing methods such as block and slot connection, magnetic fixation, etc. can also be adopted between the adjustment rack 14 and the cutter 2.

[0064] Based on any of the above embodiments, Figure 1 and Figure 2 A mounting plate that fits with the cutter seat 5 is provided on the side of the rotating motor 12 close to the cutter seat 5. The cutter seat 5 is provided with a second threaded hole on the mounting plate, and a second through hole that matches the second threaded hole is provided on the mounting plate. The mounting plate is fixed to the cutter seat 5 by a second fixing screw 16 that matches the second threaded hole.

[0065] Specifically, to achieve the fixation of the rotating motor 12, the above-mentioned fixing method is one of the feasible fixing methods. A vertical mounting plate extends from one side of the rotating motor 12, and one side surface of the mounting plate is located in the same plane as the side surface of the rotating motor 12. At least two second through holes arranged opposite to each other are opened on the side surface of the mounting plate, and a corresponding number of second threaded holes are opened at relative positions on the cutter seat 5. The mounting plate and one side of the rotating motor 12 are affixed to the side of the cutter seat 5, with the second through holes corresponding to the second threaded holes. The second fixing screw 16 is sequentially passed through the second through hole and the second threaded hole to removably fix the rotating motor 12 to the side of the cutter seat 5. At the same time, other removable fixing methods such as block and slot connection, magnetic fixation, etc. can also be used between the rotating motor 12 and the cutter seat 5, and the rotating motor 12 can also be fixed to the base.

[0066] In a specific embodiment provided in the present application, the locking assembly includes a pressure plate 3 and a lifting member. A connecting rod 15 is provided between the pressure plate 3 and the cutter seat 5. The two ends of the connecting rod 15 are hinged to the pressure plate 3 and the cutter seat 5 respectively. The lifting end of the lifting member is hinged to one end of the pressure plate 3 so that the pressure plate 3 is pressed against the cutter 2 away from one end of the lifting member.

[0067] Specifically, the locking assembly adopts a pressing manner, the middle part of the pressing plate 3 is connected with the cutter seat 5 through the connecting rod 15, the two ends of the connecting rod 15 are respectively hinged between the pressing plate 3 and the cutter seat 5, the end of the connecting rod 15 connected with the pressing plate 3 is connected with the pressing plate 3 through the first hinge shaft 6 arranged between the two, the end of the connecting rod 15 connected with the cutter seat 5 is provided with a hinge seat on the side of the cutter seat 5 close to the connecting rod 15, the hinge seat is connected with the connecting rod 15 through the second hinge shaft 7, the lifting piece is located at the end of the pressing plate 3 away from the cutter seat 5, the lifting output part of the lifting piece is hinged with the pressing plate 3, one end of the pressing plate 3 is lifted upward by the lifting piece, and the other end of the pressing plate 3 is buckled on the cutter 2 under the action of the connecting rod 15, so that the cutter 2 is kept stationary, and the specific pressing manner can be that a limiting groove 17 is arranged on the side of the cutter 2 close to the pressing plate 3, the end of the pressing plate 3 close to the limiting groove 17 is in interference fit with the limiting groove 17, and the end of the pressing plate 3 is made of elastic material to better buckle in the limiting groove 17, so that the pressing plate 3 is buckled on the cutter 2, and the cutter 2 is locked.

[0068] Further in combination with the above manner, the limiting groove 17 is arranged on the side of the cutter 2 close to the pressing plate 3, and the pressing block matched with the limiting groove 17 is formed on the end of the pressing plate 3 away from the lifting piece, and the surface of the pressing block abuts against the inner wall of the limiting groove 17.

[0069] The limiting groove 17 and the pressing block are in interference fit, and the pressing block can be made of elastic material to better cooperate with the limiting groove 17. Figure 3 and Figure 4 As shown, Figure 3 is a schematic view of the pressing plate 3 in a contact state, Figure 4 is a schematic view of the pressing plate 3 in a locking state.

[0070] On the basis of any one of the above embodiments, the lifting piece includes the lifting cylinder 11 arranged on the base and the lifting rod 9 arranged on the output end of the lifting cylinder 11, and the end of the lifting rod 9 away from the lifting cylinder 11 is hinged with the pressing plate 3.

[0071] Specifically, the lifting piece adopts the cooperation of the lifting cylinder 11 and the lifting rod 9, the lifting cylinder 11 is fixedly arranged on the base and provides the gas source for the lifting cylinder 11 through the gas pipe 10, the lifting rod 9 is arranged on the output end of the lifting cylinder 11, and the reciprocating movement of the lifting rod 9 driven by the lifting cylinder 11 realizes the pressing or releasing of the pressing plate 3.

[0072] The cutter position adjustment mechanism of the present embodiment utilizes a rotating motor 12 to drive an adjustment gear 13 and an adjustment rack 14, precisely controlling the position of the cutter 2 to accommodate buttonholes of varying lengths. A locking assembly securely locks the cutter 2 in place after it has moved to the designated position, ensuring stability during the cutting process. Compared to existing methods requiring manual replacement of the air hammer or multiple cuts, this mechanism is simpler to operate, more adaptable, and significantly improves production efficiency.

[0073] The method for using the cutter position adjustment mechanism provided in this application is applied to the above-mentioned cutter position adjustment mechanism, wherein the method for using specifically comprises the following steps:

[0074] S1. Determine the moving distance of cutter 2 according to the required buttonhole length;

[0075] S2, controlling the locking assembly to release the lock on the cutter 2;

[0076] S3, control the drive assembly to drive the cutter 2 to move to the specified position;

[0077] S4, controlling the locking assembly to lock the position of the cutter 2 again.

[0078] Specifically, the device can be electronically controlled, by inputting the keyhole length on the operation screen of the device, and determining the distance the cutter 2 needs to move according to the input keyhole length;

[0079] Control the lifting cylinder 11 to drive the lifting rod 9 to retract, so that the pressing block limit groove 17 is released, thereby releasing the lock on the cutter 2;

[0080] The rotating motor 12 is controlled to drive the adjusting gear 13 to rotate, thereby driving the adjusting rack 14 to move horizontally, and then driving the cutter to adjust the position. After the position is adjusted to the specified position according to the buttonhole length, the rotating motor 12 is stopped.

[0081] The lifting cylinder 11 is controlled again to drive the lifting rod 9 to rise, so that the pressing block is pressed into the limiting groove 17, thereby locking the cutter 2. At this point, a setting process is completed.

[0082] The working principle of this embodiment is as follows: through the above steps, the position of the cutter 2 can be precisely adjusted according to actual needs, so that cloth can be cut into buttonholes of different lengths. The entire process is automatically controlled by the electronic control system, which reduces the tedious manual operation and improves production efficiency and cloth cutting accuracy.

[0083] The round head button sewing machine provided in the application comprises the cutter position adjusting mechanism and a pneumatic hammer 1 matched with the cutter 2. The impact axis of the pneumatic hammer 1 is perpendicular to the moving direction of the cutter 2, and the stroke of the pneumatic hammer 1 covers all the movable range of the cutter 2. When the cutter 2 moves to the position of the longest button length, the impact axis of the pneumatic hammer 1 is aligned with the end of the cutter 2.

[0084] Specifically, as shown in Figure 5 , when the cutter position adjustment is finished and the sewing of the button is finished, the entire assembly of the first table 21, the second table 22 and the scissors assembly 23 is always moved to the optimal range of the cutting position (i.e. the range of the circle shown by the dashed line in the figure), and the position is close to the extension line e of the scissors, at which the cutting can ensure high stability.

[0085] As shown in Figure 6 , the position is that when the button length is the longest, the cutter 2 is aligned with one side of the pneumatic hammer 1, and the alignment line is f. As shown in Figure 7 , when the button length is the shortest, the cutter 2 moves to the right through the adjustment of the gear 13 and the rack 14, and the left side of the alignment line f is the effective cutting length. Figure 7 In the figure, a, b and c are the schematic diagrams of the button length from long to short, and d is the orientation schematic diagram of the button length.

[0086] At the same time, as shown in Figure 6 and Figure 7 , the thread tail of the button is always at a position, the cutting position of the scissors is determined, the button can be kept short, and by arranging the corresponding air suction device at the thread tail of the button, the effect of thread tail cleaning-free can be achieved, and the overall efficiency of the device is further improved.

[0087] In the specification, each embodiment is described in a progressive manner, and each embodiment focuses on the difference from other embodiments. The same or similar parts of each embodiment can be referred to each other.

[0088] The cutter position adjusting mechanism, the use method and the round head button sewing machine provided in the application are described in detail. In this paper, specific examples are applied to describe the principles and implementation modes of the application. The description of the above embodiments is only used to help understand the method and the core idea of the application. It should be pointed out that for ordinary skilled persons in the technical field, some improvements and modifications can be made to the application without departing from the principles of the application, and these improvements and modifications also fall within the protection scope of the application.

Claims

1. A cutter position adjustment mechanism, characterized in that: include: base; A cutter seat (5) is arranged on the base, a cutter (2) is slidably arranged on the cutter seat (5), and the cutter (2) slides along the blade direction; A drive assembly is provided on the base, and is used to drive the cutter (2) to slide along the cutting edge on the cutter seat (5); A locking assembly is provided on the base, and the locking assembly is used to lock the position of the cutter (2).

2. The cutter position adjustment mechanism according to claim 1, characterized in that: The drive assembly includes: an adjusting rack (14), wherein the adjusting rack (14) is fixedly arranged on one side of the cutter (2); A rotating motor (12) is fixedly mounted on the cutter seat (5) on one side of the adjusting rack (14); An adjusting gear (13) is provided on the output shaft of the rotating motor (12), and the adjusting gear (13) is meshed with the adjusting rack (14).

3. The cutter position adjustment mechanism according to claim 2, characterized in that: A first threaded hole is provided on one side of the cutter (2), a first through hole is provided on the adjustment rack (14) and matches the first threaded hole, and the adjustment rack (14) is fixed to one side of the cutter (2) by a first fixing screw (4) and matching the first threaded hole.

4. The cutter position adjustment mechanism according to claim 2, wherein: A mounting plate fitted with the cutter seat (5) is provided on one side of the rotary motor (12) close to the cutter seat (5); the cutter seat (5) is provided with a second threaded hole at the mounting plate; a second through hole fitted with the second threaded hole is provided on the mounting plate; the mounting plate is fixed to the cutter seat (5) by a second fixing screw (16) fitted with the second threaded hole.

5. The cutter position adjustment mechanism according to claim 2, characterized in that: The locking assembly comprises: A pressure plate (3), a connecting rod (15) is provided between the pressure plate (3) and the cutter seat (5), and two ends of the connecting rod (15) are hinged to the pressure plate (3) and the cutter seat (5) respectively; A lifting member, wherein the lifting end of the lifting member is hinged to one end of the pressing plate (3), so that the pressing plate (3) is away from the end of the lifting member and is pressed against the cutter (2).

6. The cutter position adjustment mechanism according to claim 5, characterized in that: A limiting groove (17) is provided on one side of the cutter (2) close to the pressure plate (3), and a pressing block that cooperates with the limiting groove (17) is formed on one end of the pressure plate (3) away from the lifting member, and the surface of the pressing block abuts against the inner wall of the limiting groove (17).

7. The cutter position adjustment mechanism according to claim 5, characterized in that: The lifting member comprises a lifting cylinder (11) arranged on the base and a lifting rod (9) arranged at the output end of the lifting cylinder (11); an end of the lifting rod (9) away from the lifting cylinder (11) is hinged to the pressure plate (3).

8. A method for using a cutter position adjustment mechanism, characterized in that: Applied to the cutter position adjustment mechanism according to any one of claims 1 to 7, the method of use comprises: Determine the moving distance of the cutter (2) according to the required buttonhole length; Controlling the locking assembly to release the lock on the cutter (2); Controlling the drive assembly to drive the cutter (2) to move to a specified position; The locking assembly is controlled to lock the position of the cutter (2) again.

9. An eyelet buttonhole sewing machine, characterized in that: The invention comprises a cutter position adjustment mechanism as claimed in any one of claims 1 to 7 and an air hammer (1) arranged in cooperation with the cutter (2).

10. The eyelet buttonhole sewing machine according to claim 9, characterized in that: The impact axis of the air hammer (1) is perpendicular to the moving direction of the cutter (2), and the stroke of the air hammer (1) covers the entire movable range of the cutter (2); When the cutter (2) moves to the position of the longest keyhole length, the impact axis of the air hammer (1) is aligned with the end of the cutter (2).

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