Automatic buttonholing machine

Abstract

The invention belongs to the technical field of buttonholing machines, and discloses an automatic buttonholing machine which is characterized in that a clothes positioning plate is mounted at one end of the top surface of a rack, and a clothes pressing mechanism is mounted on the clothes positioning plate; a positioning plate moving mechanism connected with the clothes positioning plate is mounted in the rack; a machine body moving mechanism connected with a buttonholing machine body is further installed in the machine frame. The controller is electrically connected with the clothes pressing mechanism, the positioning plate moving mechanism and the machine body moving mechanism. By means of the positioning plate moving mechanism and the machine body moving mechanism, accurate and continuous sewing of a plurality of lock holes in the vertical direction and the horizontal direction can be achieved, it is guaranteed that the problems of deviation, inaccurate spacing and the like are avoided, manpower is saved, and sewing efficiency is improved. Besides, the buttonholing machine body can be controlled to move while the clothes are controlled to move, the effect that the clothes positioning plate and the feeding device installed on the buttonholing machine body operate synchronously is achieved, and the better effect and flexibility of sewing machining are further improved.

Description

Technical Field

[0001] This invention belongs to the field of buttonhole machine technology, and specifically relates to an automatic buttonhole machine. Background Technology

[0002] Buttonhole machines are primarily used for processing buttonholes in the stitching decorations of various garments, bags, and stroller packaging. They are divided into flat-head and round-head types, and further into those with and without finishing processes. They are a very important type of specialized equipment in buttonhole processing machinery. Existing buttonhole machines require manual positioning and adjustment during operation, making continuous operation impossible. Furthermore, they demand high levels of skill from operators, and manual positioning can lead to buttonhole misalignment and uneven spacing. Changing to different sizes or shapes of buttonholes requires manual calibration, which is time-consuming and labor-intensive. Summary of the Invention

[0003] The purpose of this invention is to provide an automatic keyhole machine to solve the above-mentioned problems existing in the prior art.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: An automatic buttonhole machine includes a controller, a frame, and a buttonhole machine body mounted in the middle of the top surface of the frame. A garment positioning plate is mounted at one end of the top surface of the frame, and a garment pressing mechanism is mounted on the garment positioning plate to press the garment firmly against the garment positioning plate. Inside the frame, a positioning plate moving mechanism connected to the garment positioning plate is installed to drive the garment positioning plate closer to or further away from the sewing needle of the buttonhole machine body, facilitating the buttonhole machine body to sew buttonholes on garments that have moved below the sewing needle. Inside the frame, a body moving mechanism connected to the buttonhole machine body is also installed to drive the buttonhole machine body to move within the middle of the frame, facilitating the precise sewing of multiple buttonholes on garments that have moved below the sewing needle. The controller is electrically connected to the garment pressing mechanism, the positioning plate moving mechanism, and the body moving mechanism.

[0005] As a preferred technical solution of the present invention, the garment positioning plate is a U-shaped plate with its opening facing the buttonhole machine body, and garment pressing mechanisms are installed on both side plates of the garment positioning plate; the positioning plate moving mechanism includes two linear guide rails installed inside the frame, the two linear guide rails being located below the two side plates of the garment positioning plate respectively, and the positioning plate moving mechanism also includes a first slider and a second slider for driving the two side plates of the garment positioning plate to slide, the first slider and the second slider being fixed to the lower ends of the two side plates of the garment positioning plate respectively, and the first slider and the second slider being slidably connected to the two linear guide rails respectively.

[0006] As a preferred technical solution of the present invention, the positioning plate moving mechanism further includes a connecting shaft rotatably connected to the other end of the frame, one end of the connecting shaft being connected to a first motor installed on the side of the frame, and the first motor being electrically connected to a controller; the positioning plate moving mechanism further includes annular synchronous belts installed on both sides of the frame, both ends of the annular synchronous belts being matched and meshed with synchronous pulleys rotatably connected to the frame, and the connecting shaft being coaxially connected to the synchronous pulleys at the same end of the two annular synchronous belts; the upper sides of the two annular synchronous belts are respectively fixedly connected to the first slider and the second slider.

[0007] As a preferred technical solution of the present invention, an upper positioning plate is fixed on both the first slider and the second slider. The upper positioning plate is disposed at the upper end of the corresponding annular synchronous belt. A lower positioning plate is connected to the lower part of the upper positioning plate by bolts. The upper end of the lower positioning plate is provided with meshing teeth that mesh with the annular synchronous belt.

[0008] As a preferred technical solution of the present invention, the machine body moving mechanism includes a transmission screw rotatably connected to a frame below the buttonhole machine body, one end of the transmission screw being connected to a second motor installed on the side of the frame, and a first connecting block fixed to the bottom of the buttonhole machine body being threadedly connected to the transmission screw; a sliding limit component is also installed between the buttonhole machine body and the frame to restrict the buttonhole machine body to slide only along the extension direction of the transmission screw; the second motor is electrically connected to the controller.

[0009] As a preferred technical solution of the present invention, the sliding limiting component includes at least one first guide rail fixed in the frame, the first guide rail being arranged parallel to the transmission lead screw, and a limiting block fixed to the bottom of the keyhole machine body being slidably connected on the first guide rail.

[0010] As a preferred technical solution of the present invention, the garment pressing mechanism includes a garment pressing plate and a pressing plate driving cylinder. The garment pressing plate is disposed above the garment positioning plate. The cylinder body of the pressing plate driving cylinder is hinged to the side of the garment positioning plate. The telescopic rod of the pressing plate driving cylinder is connected to the garment pressing plate through a transmission linkage assembly, so that the pressing plate driving cylinder drives the garment pressing plate to horizontally press the garment pressing plate onto garments of different thicknesses through the transmission linkage assembly.

[0011] As a preferred technical solution of the present invention, the transmission linkage assembly includes a U-shaped corner lug, a first swing arm, and a second swing arm. The telescopic rod of the pressure plate drive cylinder is inclined upwards and is fixedly connected to the middle of the U-shaped corner lug. The first swing arm is inclined, and the lower end of the second swing arm is vertically connected to one end of the garment pressure plate. The upper end of the first swing arm is hinged in the U-shaped corner lug, and the lower end of the first swing arm is rotatably connected to the upper end of the second swing arm. A vertical corner lug with an upward opening is fixed on the garment positioning plate, and the middle of the first swing arm is hinged in the vertical corner lug.

[0012] As a preferred technical solution of the present invention, the upper end of the second swing arm is a connecting end that bends toward the extension direction of the first swing arm. The connecting end of the second swing arm is rotatably connected to the lower end of the first swing arm through a rotating shaft. The lower end of the first swing arm is provided with an arc-shaped hole extending with the rotating shaft as the central axis. The connecting end of the second swing arm is provided with a limiting head that can slide along the arc-shaped hole.

[0013] As a preferred technical solution of the present invention, casters are installed at the lower end of the frame, and a control cabinet is fixed on the frame, with the controller installed inside the control cabinet.

[0014] Beneficial Effects: Before actual operation, the present invention first presses the garment onto the garment positioning plate using a garment pressing mechanism, ensuring that the areas to be sewn on the garment are taut, thus facilitating the sewing of buttonholes. During actual operation, the positioning plate moving mechanism drives the garment positioning plate closer to the buttonhole machine body, placing the areas to be sewn on the garment below the sewing needle. Then, the machine body moving mechanism drives the buttonhole machine body to move in the middle of the frame, controlling the sewing needle to stop at each buttonhole position on the garment, ensuring that the buttonholes are sewn at equal intervals. The positioning plate moving mechanism and the machine body moving mechanism enable multiple buttonholes to be sewn precisely and continuously in all directions according to the electronically controlled sewing positions, ensuring no deviation or inaccurate spacing, saving manpower and improving sewing efficiency. Moreover, during operation, the positioning plate moving mechanism and the machine body moving mechanism can cooperate with each other, controlling the movement of the garment and the buttonhole machine body simultaneously, achieving synchronous operation of the feeding device installed on the garment positioning plate and the buttonhole machine body, further enhancing the superior effect and flexibility of the sewing process. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a partial structural schematic diagram of the present invention; Figure 3 for Figure 2 A schematic diagram of the structure from another perspective; Figure 4 This is a schematic diagram of the clothing clamping mechanism in this invention.

[0016] In the diagram: 1-Frame; 2-Buttonhole machine body; 3-Clothing positioning plate; 4-Linear guide rail; 5-First slider; 6-Connecting shaft; 7-First motor; 8-Annular synchronous belt; 9-Transmission screw; 10-Second motor; 11-First guide rail; 12-Clothing pressing plate; 13-Pressure plate drive cylinder; 14-U-shaped ear; 15-First swing arm; 16-Second swing arm; 17-Vertical ear; 18-Cast; 19-Control cabinet. Detailed Implementation

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the present invention will be briefly introduced below in conjunction with the accompanying drawings and descriptions of the embodiments or the prior art. Obviously, the following description of the structure of the accompanying drawings is only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. It should be noted that the description of these embodiments is for the purpose of helping to understand the present invention, but does not constitute a limitation of the present invention.

[0018] Example: like Figures 1-4 As shown, this embodiment provides an automatic buttonhole machine, including a controller, a frame 1, and a buttonhole machine body 2 installed in the middle of the top surface of the frame 1. In practice, an area is opened in the middle of the top surface of the frame 1, and the area of ​​the area is larger than the size of the buttonhole machine body 2, so that the buttonhole machine body 2 can move within the area. This provides space for the movement of the buttonhole machine body 2 during the sewing process, allowing the buttonhole machine body 2 to accurately sew clothing (it should be noted that this is an example of clothing; in practice, the sewing material will be selected according to the needs, and the names of related components, such as the clothing positioning plate mentioned below, are just general terms and do not limit the sewing material) according to a preset program.

[0019] Furthermore, a garment positioning plate 3 is installed at one end of the top surface of the frame 1. Garments that need to be sewn with buttonholes can be placed on the garment positioning plate 3. A garment pressing mechanism is installed on the garment positioning plate 3 to press the garment tightly onto the garment positioning plate 3, ensuring the stability of the garment when sewing buttonholes. Simply put, it positions the garment so that the part of the garment that needs to be sewn is taut, so that the garment will not wrinkle or have other problems when the buttonhole machine body 2 sews buttonholes on the garment.

[0020] Furthermore, the frame 1 is equipped with a positioning plate moving mechanism connected to the garment positioning plate 3. This mechanism drives the garment positioning plate 3 to move closer to or further away from the sewing needle of the buttonhole machine body 2, so that the buttonhole machine body 2 can sew buttonholes on the garment that has moved to the position below the sewing needle. The frame 1 is also equipped with a body moving mechanism connected to the buttonhole machine body 2. This mechanism drives the buttonhole machine body 2 to move in the middle of the frame 1, so that the buttonhole machine body 2 can precisely sew multiple buttonholes on the garment that has moved to the position below the sewing needle. The controller is electrically connected to the garment pressing mechanism, the positioning plate moving mechanism, and the body moving mechanism, so that the controller can realize the automatic operation of the garment pressing mechanism, the positioning plate moving mechanism, and the body moving mechanism. The positioning plate moving mechanism works in conjunction with the body moving mechanism to realize the automatic processing of garments.

[0021] It should be noted that, in practice, the buttonhole machine body 2 is equipped with a feeding device for feeding (this is existing technology, such as the brand high-speed electronic flat-head buttonhole machine with model number LBH-1790A, so it will not be described in detail in this article). The feeding device is also electrically connected to the controller. When the automatic buttonhole machine of this invention is actually running, the clothing positioning plate 3 is driven to run synchronously with the feeding device of the buttonhole machine body 2 under the control of the positioning plate moving mechanism.

[0022] Before actual operation, this invention first uses a garment pressing mechanism to press the garment onto the garment positioning plate 3, ensuring that the areas to be sewn on the garment are taut, thus facilitating the sewing of buttonholes. During actual operation, the positioning plate moving mechanism drives the garment positioning plate 3 closer to the buttonhole machine body 2, so that the areas to be sewn on the garment are below the sewing needle. Then, the machine body moving mechanism drives the buttonhole machine body 2 to move in the middle of the frame 1, controlling the sewing needle to stop at each buttonhole position on the garment, ensuring that the buttonholes on the garment can be accurately sewn according to the pre-set program. The positioning plate moving mechanism and the machine body moving mechanism can achieve precise and continuous sewing of multiple buttonholes in all directions, ensuring that there are no problems such as misalignment or inaccurate spacing, saving manpower and improving sewing efficiency. Moreover, during operation, the positioning plate moving mechanism and the machine body moving mechanism can cooperate with each other, controlling the movement of the garment and the buttonhole machine body 2 simultaneously, achieving the effect of synchronous operation of the feeding device installed on the garment positioning plate 3 and the buttonhole machine body 2, further improving the better effect and flexibility of sewing processing.

[0023] As a preferred embodiment of this invention, it should be further explained that the garment positioning plate 3 is a U-shaped plate with its opening facing the buttonhole machine body 2, leaving space at the opening of the garment positioning plate 3 to facilitate the sewing of buttonholes. Garment pressing mechanisms are installed on both side plates of the garment positioning plate 3 to facilitate positioning of both sides of the sewing position, ensuring the stability of the garment during sewing, and thus ensuring sewing quality. Figure 2 As shown, the positioning plate moving mechanism includes two linear guide rails 4 installed inside the frame 1. The two linear guide rails 4 are respectively located below the two side plates of the garment positioning plate 3. The positioning plate moving mechanism also includes a first slider 5 and a second slider for driving the two side plates of the garment positioning plate 3 to slide. The first slider 5 and the second slider are respectively fixed to the lower ends of the two side plates of the garment positioning plate 3, and the first slider 5 and the second slider are respectively slidably connected to the two linear guide rails 4. In practice, the positioning plate moving mechanism controls the first slider 5 and the second slider to slide along the two linear guide rails 4, so as to control the garment on the garment positioning plate 3 to move closer to or further away from the sewing needle of the buttonhole machine body 2.

[0024] As a preferred embodiment of this invention, it should be further explained that the positioning plate moving mechanism also includes a connecting shaft 6 rotatably connected to the other end of the frame 1. The connecting shaft 6 can be installed inside the frame 1 through a bearing seat to ensure its flexibility and stability. One end of the connecting shaft 6 is connected to a first motor 7 installed on the side of the frame 1 (in the figure, it actually points to the cover set outside the first motor 7). The first motor 7 is electrically connected to the controller to facilitate the control of the operation of the first motor 7, and then the first motor 7 controls the rotation of the connecting shaft 6. The positioning plate moving mechanism also includes annular synchronous belts 8 installed on both sides of the frame 1. Both ends of the annular synchronous belts 8 are matched and meshed with rotatably connected to the machine. The synchronous pulley inside the frame 1 has its central shaft mounted inside the frame 1 via a bearing seat, ensuring the stability and flexibility of the synchronous pulley, and thus ensuring the flexibility and stability of the annular synchronous belt 8. The connecting shaft 6 is coaxially connected to the synchronous pulleys at the same end of the two annular synchronous belts 8, so that when the connecting shaft 6 rotates, it can drive the synchronous pulleys to rotate, and the rotation of the synchronous pulleys can drive the annular synchronous belt 8 to rotate. The upper sides of the two annular synchronous belts 8 are fixedly connected to the first slider 5 and the second slider, respectively, so that the annular synchronous belts 8 can continue to rotate forward and backward within an appropriate position, thereby driving the first slider 5 and the second slider to move repeatedly within a certain range, so as to move the clothing positioning plate 3 closer to or away from the buttonhole machine body 2.

[0025] As a preferred embodiment of this invention, it should be further explained that an upper positioning plate is fixed on both the first slider 5 and the second slider, preferably detachably connected by bolts. The upper positioning plate is located at the upper end of the corresponding annular synchronous belt 8, and a lower positioning plate is connected to the lower part of the upper positioning plate by bolts. The upper end of the lower positioning plate is provided with meshing teeth that mesh with the annular synchronous belt 8, so that the annular synchronous belt 8 can drive the lower positioning plate to move when it moves. The lower positioning plate and the upper positioning plate cooperate to clamp the annular synchronous belt 8. In this way, when the annular synchronous belt 8 rotates, the first slider 5 and the second slider can be moved by the upper positioning plate.

[0026] As a preferred embodiment of this practice, it should be further explained that, as Figure 3As shown, the moving mechanism includes a transmission screw 9 rotatably connected to a frame 1 below the buttonhole machine body 2. The transmission screw 9 is rotatably connected to the frame 1 via a bearing seat. One end of the transmission screw 9 is connected to a second motor 10 installed on the side of the frame 1, which facilitates the control of the transmission screw 9 rotation by the second motor 10. A first connecting block fixed to the bottom of the buttonhole machine body 2 is threaded onto the transmission screw 9. A sliding limit assembly is also installed between the buttonhole machine body 2 and the frame 1 to restrict the buttonhole machine body 2 to slide only along the extension direction of the transmission screw 9. This allows the second motor 10 to control the first connecting block to slide via the transmission screw 9 when it starts, thereby driving the buttonhole machine body 2 to slide. The second motor 10 (actually referring to the cover outside the second motor 10 in the figure) is electrically connected to the controller to ensure control of the second motor 10.

[0027] As a preferred embodiment of this invention, it should be further explained that the sliding limiting component includes at least one first guide rail 11 fixed inside the frame 1. The first guide rail 11 is arranged parallel to the transmission screw 9. A limiting block fixed to the bottom of the buttonhole machine body 2 is slidably connected to the first guide rail 11. In this way, when the second motor 10 starts and controls the buttonhole machine body 2 to move, the first guide rail 11 cannot move, thus restricting the limiting block and the buttonhole machine body 2 connected to the limiting block to slide only along the first guide rail 11.

[0028] As a preferred embodiment of this practice, it should be further explained that, as Figure 4 As shown, the garment pressing mechanism includes a garment pressing plate 12 and a pressing plate driving cylinder 13. The garment pressing plate 12 is positioned above the garment positioning plate 3. The cylinder body of the pressing plate driving cylinder 13 is hinged to the side of the garment positioning plate 3 to ensure its stability. The telescopic rod of the pressing plate driving cylinder 13 is connected to the garment pressing plate 12 through a transmission linkage assembly, so that the pressing plate driving cylinder 13 drives the garment pressing plate 12 to press horizontally onto garments of different thicknesses through the transmission linkage assembly. In this way, the pressing plate driving cylinder 13 controls the up and down movement of the garment pressing plate 12 to achieve garment pressing.

[0029] As a preferred embodiment of this invention, it should be further explained that the transmission linkage assembly includes a U-shaped lug 14, a first swing arm 15, and a second swing arm 16. The telescopic rod of the pressure plate drive cylinder 13 is inclined upwards, and the telescopic rod of the pressure plate drive cylinder 13 is fixedly connected to the middle of the U-shaped lug 14. The first swing arm 15 is inclined, and the lower end of the second swing arm 16 is vertically connected to one end of the clothing pressure plate 12. The upper end of the first swing arm 15 is hinged inside the U-shaped lug 14, and the lower end of the first swing arm 15 is rotatably connected to the upper end of the second swing arm 16. The garment positioning plate 3 is fixed with a vertically oriented ear 17 facing upwards. The middle part of the first swing arm 15 is hinged to the vertically oriented ear 17 to ensure the stability of the first swing arm 15. In this way, when the pressure plate drive cylinder 13 is activated, the upper end of the first swing arm 15 can be controlled to move up and down, which in turn drives the lower end of the first swing arm 15 to move up and down. The lower end of the first swing arm 15 then drives the upper end of the second swing arm 16 to move up and down, thereby realizing the up and down movement control of the garment pressure plate 12. The setting of the vertically oriented ear enhances the stability of the first swing arm when swinging, ensuring that the entire transmission process is smooth and reliable.

[0030] As a preferred embodiment of this invention, it should be further explained that the upper end of the second swing arm 16 is a connecting end that bends towards the extension direction of the first swing arm 15. The connecting end of the second swing arm 16 is rotatably connected to the lower end of the first swing arm 15 via a pivot. The lower end of the first swing arm 15 has an arc-shaped hole extending from the pivot as its central axis. The connecting end of the second swing arm 16 is provided with a limiting head that can slide along the arc-shaped hole. The limiting head effectively prevents the clothing pressing plate 12 from tilting at a large angle during its up-and-down movement. Then, the weight of the clothing pressing plate 12 is used to keep it in a relatively horizontal state. In this way, when the clothing pressing plate 12 presses down on the clothing, it can press down on the clothing as a whole, ensuring the stability of the clothing. At the same time, the bending of the connecting end also allows the upper end of the second swing arm 16 to fit as closely as possible to the lower end of the first swing arm 15, which makes it easier to open the arc-shaped hole.

[0031] Preferably, in practice, the lower end of the first swing arm 15 can be provided with two arc-shaped holes, and the upper end of the second swing arm 16 is provided with two limiting heads, which are respectively set in the two arc-shaped holes.

[0032] As a preferred embodiment of this invention, it should be further noted that the lower end of the frame 1 is equipped with casters 18 for easy movement and improved flexibility. A control cabinet 19 is also fixed on the frame 1, and the controller is installed inside the control cabinet 19. At the same time, a power supply battery is installed inside the control cabinet 19 to ensure that the equipment can be moved flexibly while realizing automated production.

[0033] Finally, it should be noted that the above description is merely a preferred embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. An automatic buttonhole machine, comprising a controller, a frame (1), and a buttonhole machine body (2) mounted in the middle of the top surface of the frame (1), characterized in that, A garment positioning plate (3) is installed at one end of the top surface of the frame (1). A garment pressing mechanism is installed on the garment positioning plate (3) to press the garment onto the garment positioning plate (3). A positioning plate moving mechanism connected to the garment positioning plate (3) is installed inside the frame (1) to drive the garment positioning plate (3) to move closer to or away from the sewing needle of the buttonhole machine body (2) so that the buttonhole machine body (2) can sew buttonholes on the garment that has moved to the bottom of the sewing needle. A body moving mechanism connected to the buttonhole machine body (2) is also installed inside the frame (1) to drive the buttonhole machine body (2) to move in the middle of the frame (1) so that the buttonhole machine body (2) can sew multiple buttonholes on the garment that has moved to the bottom of the sewing needle. The controller is electrically connected to the garment pressing mechanism, the positioning plate moving mechanism and the body moving mechanism.

2. An automatic buttonhole machine according to claim 1, characterized in that, The garment positioning plate (3) is a U-shaped plate with its opening facing the buttonhole machine body (2). Garment pressing mechanisms are installed on both side plates of the garment positioning plate (3). The positioning plate moving mechanism includes two linear guide rails (4) installed inside the frame (1). The two linear guide rails (4) are located below the two side plates of the garment positioning plate (3). The positioning plate moving mechanism also includes a first slider (5) and a second slider for moving the two side plates of the garment positioning plate (3). The first slider (5) and the second slider are fixed to the lower ends of the two side plates of the garment positioning plate (3) respectively, and the first slider (5) and the second slider are slidably connected to the two linear guide rails (4) respectively.

3. An automatic buttonhole machine according to claim 2, characterized in that, The positioning plate moving mechanism also includes a connecting shaft (6) rotatably connected to the other end of the frame (1). One end of the connecting shaft (6) is connected to a first motor (7) installed on the side of the frame (1). The first motor (7) is electrically connected to the controller. The positioning plate moving mechanism also includes annular synchronous belts (8) installed on both sides of the frame (1). Both ends of the annular synchronous belts (8) are matched and meshed with synchronous pulleys rotatably connected to the frame (1). The connecting shaft (6) and the synchronous pulleys at the same end of the two annular synchronous belts (8) are coaxially connected. The upper sides of the two annular synchronous belts (8) are fixedly connected to the first slider (5) and the second slider, respectively.

4. An automatic buttonhole machine according to claim 3, characterized in that, The first slider (5) and the second slider are both fixed with an upper positioning plate. The upper positioning plate is set at the upper end of the corresponding annular synchronous belt (8). The lower positioning plate is connected to the lower part of the upper positioning plate by bolts. The upper end of the lower positioning plate is provided with meshing teeth that mesh with the annular synchronous belt (8).

5. An automatic buttonhole machine according to claim 1, characterized in that, The moving mechanism of the machine body includes a transmission screw (9) rotatably connected to the frame (1) below the buttonhole machine body (2). One end of the transmission screw (9) is connected to a second motor (10) installed on the side of the frame (1). A first connecting block fixed to the bottom of the buttonhole machine body (2) is threaded onto the transmission screw (9). A sliding limit component is also installed between the buttonhole machine body (2) and the frame (1) to restrict the buttonhole machine body (2) to slide only along the extension direction of the transmission screw (9). The second motor (10) is electrically connected to the controller.

6. An automatic buttonhole machine according to claim 5, characterized in that, The sliding limit assembly includes at least one first guide rail (11) fixed inside the frame (1). The first guide rail (11) is arranged parallel to the transmission screw (9). A limit block fixed to the bottom of the keyhole machine body (2) is slidably connected on the first guide rail (11).

7. An automatic buttonhole machine according to claim 1 or 2, characterized in that, The garment pressing mechanism includes a garment pressing plate (12) and a pressing plate driving cylinder (13). The garment pressing plate (12) is located above the garment positioning plate (3). The cylinder body of the pressing plate driving cylinder (13) is hinged to the side of the garment positioning plate (3). The telescopic rod of the pressing plate driving cylinder (13) is connected to the garment pressing plate (12) through a transmission linkage assembly, so that the pressing plate driving cylinder (13) drives the garment pressing plate (12) to press horizontally onto garments of different thicknesses through the transmission linkage assembly.

8. An automatic buttonhole machine according to claim 7, characterized in that, The transmission linkage assembly includes a U-shaped corner lug (14), a first swing arm (15), and a second swing arm (16). The telescopic rod of the pressure plate drive cylinder (13) is inclined upwards and is fixedly connected to the middle of the U-shaped corner lug (14). The first swing arm (15) is inclined, and the lower end of the second swing arm (16) is vertically connected to one end of the garment pressure plate (12). The upper end of the first swing arm (15) is hinged in the U-shaped corner lug (14), and the lower end of the first swing arm (15) is rotatably connected to the upper end of the second swing arm (16). A vertical corner lug (17) with an opening facing upwards is fixed on the garment positioning plate (3), and the middle of the first swing arm (15) is hinged in the vertical corner lug (17).

9. An automatic buttonhole machine according to claim 8, characterized in that, The upper end of the second swing arm (16) is a connecting end that bends toward the extension direction of the first swing arm (15). The connecting end of the second swing arm (16) is rotatably connected to the lower end of the first swing arm (15) through a rotating shaft. The lower end of the first swing arm (15) is provided with an arc-shaped hole extending with the rotating shaft as the central axis. The connecting end of the second swing arm (16) is provided with a limiting head that can slide along the arc-shaped hole.

10. An automatic buttonhole machine according to claim 1, characterized in that, The lower end of the frame (1) is equipped with casters (18), and a control cabinet (19) is also fixed on the frame (1), with the controller installed inside the control cabinet (19).

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