A lift feed device for a stitcher

Abstract

The present application relates to a kind of pry seam sewing machine's lifting tooth feeding device.Mainly solve pry seam machine when using, material is prone to wrinkle, and between feeding and positioning crochet cannot effectively switch, there is the problem of poor action independence.It is characterized by: including cam lifting mechanism, feeding mechanism, presser foot plate and lifting tooth, presser foot plate, lifting tooth is connected with cam lifting mechanism, feeding mechanism is connected with lifting tooth, lifting mechanism drives lifting tooth and presser foot plate to rise or drop, cam lifting mechanism drives presser foot plate and lifting tooth reverse lifting movement, feeding mechanism drives lifting tooth reciprocating motion.The pry seam machine uses cam lifting mechanism and feeding mechanism to combine lifting tooth and presser foot plate, uses presser foot plate and lifting tooth reverse lifting and the reciprocating motion of lifting tooth, to realize the purpose of material feeding and positioning crochet, material is not disturbed between action switching, with prevent material wrinkle, action coherence is good, nimble, function independence and structure rationality and the like advantages.

Description

Technical Field

[0001] This invention relates to a sewing device, and more particularly to a feed device for a pry sewing machine. Background Technology

[0002] Currently, existing sewing machines, such as blind stitch machines, use a multi-chain, sprocket-connected integrated transmission method for feeding materials. They also require positioning of the sewing material to achieve the hook's clamping mechanism. This results in a complex overall structure. Furthermore, the lack of effective material positioning during hook and feeding leads to wrinkles in the material during processing. Moreover, the movements between material positioning and material feeding are not continuous and cannot be quickly switched, resulting in decreased processing efficiency and compromised performance. Summary of the Invention

[0003] In order to overcome the shortcomings and deficiencies of the prior art, the present invention provides a lifting feed device for a pry sewing machine, which solves the technical problems of existing pry sewing machines, which are limited by their structure, causing materials to wrinkle easily during use, and the inability to effectively switch between feeding and positioning hooks for sewing materials, and the easy interference between them during processing, thus affecting processing performance and quality.

[0004] The technical solution of this invention is: a feed dog lifting device for a pry sewing machine, comprising a machine housing, a support, a needle plate, and a lifting mechanism. The support and lifting mechanism are mounted on the machine housing. The needle plate is located at the upper end of the machine housing. The device includes a cam lifting mechanism, a feeding mechanism, a presser foot plate, and a feed dog. The lifting mechanism can drive the cam lifting mechanism and the feeding mechanism to rise and fall along the support. The presser foot plate is located below the needle plate and connected to the cam lifting mechanism. The feed dog is mounted below the presser foot plate and connected to the cam lifting mechanism. The feeding mechanism is connected to the feed dog. The lifting mechanism drives the feed dog and the presser foot plate to rise or fall via the cam lifting mechanism and the feeding mechanism. The cam lifting mechanism simultaneously drives the presser foot and the lifting tooth to move in opposite directions, while the feeding mechanism drives the lifting tooth to move back and forth. The lifting mechanism drives the presser foot to rise and contact the needle plate to clamp the sewing material for stitching. The cam lifting mechanism drives the lifting tooth to rise and press against the needle plate to clamp the sewing material. At the same time, the cam lifting mechanism drives the presser foot to fall away from the needle plate. The feeding mechanism drives the lifting tooth to move to the left to feed the sewing material. The cam lifting mechanism drives the lifting tooth to fall, while the presser foot rises to clamp the sewing material for stitching, and the feeding mechanism drives the lifting tooth to move to the right.

[0005] The cam lifting mechanism includes a lifting stepper motor, a rotating shaft, a first eccentric wheel, a first lifting block, a second eccentric wheel, and a second lifting block. The lifting stepper motor drives the rotating shaft to rotate. The first and second eccentric wheels are axially mounted on the rotating shaft. The first and second lifting blocks are vertically aligned and parallel to each other. The lower end of the first lifting block is sleeved on the first eccentric wheel to form a cam eccentric fit. The upper end of the first lifting block is hinged to the lifting tooth. The lower end of the second lifting block is sleeved on the second eccentric wheel to form a cam eccentric fit. The upper end of the second lifting block is hinged to the pressure foot plate. The rotation of the lifting stepper motor drives the rotating shaft to rotate, and the rotating shaft drives the first and second eccentric wheels to rotate. The first and second eccentric wheels respectively drive the first and second lifting blocks to move in opposite directions.

[0006] The feeding mechanism includes a feeding stepper motor, a rotating arm, and a connecting rod. The feeding stepper motor drives the rotating arm to rotate. The rotating arm is hinged. One end of the connecting rod is hinged to the rotating arm, and the other end is hinged to the upper end of the first lifting block. The lifting tooth is mounted on the connecting rod.

[0007] The pressure foot plate is connected to the second lifting block via a fixing assembly. The fixing assembly includes a fixing block, a fixing shaft, a positioning block, a pin, and fasteners. The fixing block is hinged to the upper end of the second lifting block. The lower end of the fixing shaft is mounted on the fixing block. The positioning block is mounted on the upper end of the fixing shaft. The pin is fixed to the upper end of the positioning block. The pressure foot plate is provided with mounting holes and positioning grooves. The pin engages with the mounting holes and is connected to the pin by passing through the pressure foot plate with fasteners. The positioning block engages with the positioning groove of the pressure foot plate.

[0008] The feeding stepper motor is connected to the rotating arm via a linkage assembly. The linkage assembly includes a swing block and a positioning ring. The positioning ring has two positioning holes, in which a first bearing and a second bearing are respectively installed. One end of the swing block is connected to the feeding stepper motor, and the other end is connected to the first bearing via a first connecting shaft. The rotating arm is connected to the second bearing via a second connecting shaft.

[0009] The lifting mechanism includes a lifting component, an elastic rocker, a slider, and a lifting guide rail, as well as a mounting plate. The cam lifting mechanism and the feeding mechanism are mounted on the mounting plate. The lifting guide rail is fixed to the bracket. The slider is fixed to the mounting plate and slides in cooperation with the lifting guide rail. One end of the elastic rocker is hinged to the machine housing, and the other end is located at the lower end of the mounting plate. The lifting component is mounted on the machine housing and cooperates with the rocker.

[0010] The bracket is provided with a limiting block, and the mounting plate slides along the lifting guide rail to form a limiting engagement with the limiting block.

[0011] The presser foot plate is provided with a strip groove, and the lifting tooth rises or falls through the strip groove. The feeding mechanism can drive the lifting tooth to move along the strip groove.

[0012] The presser foot plate is equipped with anti-slip teeth.

[0013] The presser foot plate has a material-stopping boss below the strip groove.

[0014] The present invention has the following advantages: The sewing machine adopts a cam lifting mechanism and a feeding mechanism combined with a lifting tooth and a presser foot plate. It uses the reverse lifting and lowering of the presser foot plate and the reciprocating motion of the lifting tooth, combined with the needle plate, to achieve the purpose of material feeding and positioning of the hook needle. The material is not disturbed between the action switching. During use, it prevents the material from wrinkling. It has the advantages of good action continuity, strong flexibility, functional independence and reasonable structure. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of the present invention.

[0016] Figure 2 This is a structural diagram of the hook of the present invention.

[0017] Figure 3 This is a schematic diagram of the cam lifting mechanism in this invention.

[0018] Figure 4 This is a structural diagram of the present invention during tooth lifting and feeding.

[0019] Figure 5 This is a schematic diagram of the structure of the present invention from another angle.

[0020] Figure 6 This is a schematic diagram of the tooth-lifting structure in this invention.

[0021] Figure 7 This is a schematic diagram of the pressure foot plate in this invention.

[0022] Figure 8 This is a partial structural diagram of the present invention.

[0023] Figure 9 This is an enlarged view of the structure of the tooth lifting mechanism in cooperation with the pressure foot plate of the present invention.

[0024] Figure 10 This is an enlarged view of the structure of the tooth lifting and lowering mechanism of the present invention in conjunction with the pressure foot plate.

[0025] Figure 11 This is an enlarged view of the structure of the present invention that cooperates with the needle plate during tooth lifting.

[0026] In the diagram, 1 is the housing, 2 is the bracket, 3 is the needle plate, 4 is the presser foot plate, 5 is the lifting tooth, 6 is the lifting stepper motor, 7 is the rotating shaft, 8 is the first eccentric wheel, 9 is the first lifting block, 10 is the second eccentric wheel, 11 is the second lifting block, 12 is the feeding stepper motor, 13 is the rotating arm, 14 is the connecting rod, 15 is the fixing block, 16 is the fixing shaft, 17 is the positioning block, 18 is the pin, 19 is the fastener, 20 is the mounting hole, 21 is the positioning groove, 22 is the swing block, 23 is the positioning ring, 24 is the positioning hole, 25 is the first bearing, 26 is the second bearing, 27 is the first connecting shaft, 28 is the second connecting shaft, 29 is the lifting component, 30 is the elastic rocker, 31 is the slider, 32 is the lifting guide rail, 33 is the mounting plate, 34 is the limit block, 35 is the strip groove, 36 is the anti-slip tooth, and 37 is the material blocking boss. Detailed Implementation

[0027] The following describes further embodiments of the present invention:

[0028] As shown in the figure, a positioning and feeding device for a pry sewing machine includes a machine housing 1, a support 2, a needle plate 3, and a lifting mechanism. The support 2 and the lifting mechanism are mounted on the machine housing 1. The needle plate 3 is located at the upper end of the machine housing 1 and includes a cam lifting mechanism, a feeding mechanism, a presser foot plate 4, and a lifting tooth 5. The lifting mechanism can drive the cam lifting mechanism and the feeding mechanism to rise and fall along the support 2. The presser foot plate 4 is located below the needle plate 3 and is connected to the cam lifting mechanism. The lifting tooth 5 is mounted below the presser foot plate 4 and is connected to the cam lifting mechanism. The feeding mechanism is connected to the lifting tooth 5. The lifting mechanism drives the lifting tooth 5 and the presser foot plate 4 to rise or fall through the cam lifting mechanism and the feeding mechanism. As the needle plate moves, the presser foot 4 rises and contacts the needle plate 3, clamping the sewing material for stitching. Simultaneously, the cam lifting mechanism drives the presser foot 4 to rise and contact the needle plate 3, clamping the sewing material for stitching. The cam lifting mechanism also drives the lifting tooth 5 to rise and press against the needle plate 3, clamping the sewing material. At the same time, the cam lifting mechanism drives the presser foot 4 to fall away from the needle plate 3. The feeding mechanism drives the lifting tooth 5 to move to the left to feed the sewing material. The cam lifting mechanism also drives the lifting tooth 5 to fall, while the presser foot 4 rises to clamp the sewing material for stitching, and the feeding mechanism drives the lifting tooth 5 to move to the right. In use, the needle plate is at the top. Initially, the lifting tooth and presser foot are misaligned, with the lifting tooth below the presser foot. A gap exists between the presser foot and needle plate to allow the sewing material to be inserted. When stitching, the material is placed into this gap. The lifting mechanism rises, pushing the cam lifting mechanism upwards. The cam lifting mechanism then moves the lifting tooth and presser foot upwards as a whole. The presser foot and needle plate clamp the sewing material, which is then lifted by the sewing machine's material-lifting mechanism for stitching. After sewing one position is completed, the cam lifting mechanism moves the lifting tooth upwards, while the presser foot moves downwards. When the lifting tooth presses the sewing material onto the needle plate, the presser foot releases the material, and the feeding mechanism pulls the lifting tooth to the left, moving the material to feed it. Then, the cam lifting mechanism moves the lifting tooth downwards, while the presser foot moves upwards until it presses down on the material for stitching. Meanwhile, the feeding mechanism moves the lifting tooth to the right, positioning it below the presser foot. Once the stitching is complete, the lifting tooth moves upwards to clamp the material with the needle plate and pulls it to feed it. This cycle continues until the entire material is processed. Finally, the lifting mechanism moves downwards, moving the presser foot and lifting tooth downwards to remove the material.The above-mentioned design employs a cam lifting mechanism and a feeding mechanism combined with a lifting tooth and a presser foot plate. It uses the reverse lifting and reciprocating motion of the presser foot plate and the lifting tooth, combined with the needle plate, to achieve the purpose of material feeding and positioning the hook needle. The material is not disturbed between the action switching. In use, the cooperation between the presser foot plate, the lifting tooth and the needle plate can effectively prevent material wrinkling. It also has the advantages of good action continuity, strong flexibility, functional independence and reasonable structure.

[0029] In this invention, as shown in the figure, the cam lifting mechanism includes a lifting stepper motor 6, a rotating shaft 7, a first eccentric wheel 8, a first lifting block 9, a second eccentric wheel 10, and a second lifting block 11. The lifting stepper motor 6 drives the rotating shaft 7 to rotate. The first eccentric wheel 8 and the second eccentric wheel 10 are axially arranged on the rotating shaft 7. The first lifting block 9 and the second lifting block 11 are vertical and parallel to each other. The lower end of the first lifting block 9 is sleeved on the first eccentric wheel 8 to form a cam eccentric fit. The upper end of the first lifting block 9 is hinged to the lifting tooth 5. The lower end of the second lifting block 11 is sleeved on the second eccentric wheel 10 to form a cam eccentric fit. The upper end of the second lifting block 11 is hinged to the pressure foot plate 4. The rotation of the lifting stepper motor 6 drives the rotating shaft 7 to rotate. The rotating shaft 7 drives the first eccentric wheel 8 and the second eccentric wheel 10 to rotate. The first eccentric wheel 8 and the second eccentric wheel 10 respectively drive the first lifting block 9 and the second lifting block 11 to move in opposite directions. The lifting stepper motor is connected to the rotating shaft via a coupling. The lower ends of the first lifting block 9 and the second lifting block 11 are provided with through holes to mate with the outer contours of the first eccentric wheel 8 and the second eccentric wheel 10. The positions of the first eccentric wheel 8 and the second eccentric wheel 10 are exactly opposite to ensure that the first lifting block 9 and the second lifting block 11 lift in opposite directions. In use, the lifting stepper motor drives the rotating shaft 7 to rotate via the coupling, and the rotating shaft simultaneously drives the first eccentric wheel 8 and the second eccentric wheel 10 to rotate. The lifting blocks are connected through the through holes between the eccentric wheels and the lifting blocks. The first and second lifting blocks work together to raise or lower the first and second lifting blocks, thereby driving the upper pressure foot plate and lifting tooth which are hinged. By using the above method, the lifting stepper motor 6, rotating shaft 7, first eccentric wheel 8, first lifting block 9, second eccentric wheel 10 and second lifting block 11 of the cam lifting mechanism can realize the lifting of the pressure foot plate and lifting tooth, thereby realizing material positioning and hook switching. The connection structure is concentrated and has the advantages of strong compactness, simple structure, reasonable and reliable operation and strong clarity.

[0030] In this invention, as shown in the figure, the feeding mechanism includes a feeding stepper motor 12, a rotating arm 13, and a connecting rod 14. The feeding stepper motor 12 drives the rotating arm 13 to rotate. The rotating arm 13 is hinged. One end of the connecting rod 14 is hinged to the rotating arm 13, and the other end is hinged to the upper end of the first lifting block 9. The lifting tooth 5 is mounted on the connecting rod 14. In use, the feeding stepper motor drives the rotating arm to swing, thereby pulling or pushing the connecting rod to achieve the purpose of lifting tooth feeding and resetting. Combined with the cam lifting mechanism, it achieves the purpose of clamping sewing materials, hooking needles, and feeding. The connection structure adopted in the above manner has strong flexibility and good performance.

[0031] In this invention, as shown in the figure, the presser foot plate 4 is connected to the second lifting block 11 via a fixing assembly. The fixing assembly includes a fixing block 15, a fixing shaft 16, a positioning block 17, a pin 18, and a fastener 19. The fixing block 15 is hinged to the upper end of the second lifting block 11. The lower end of the fixing shaft 16 is mounted on the fixing block 15. The positioning block 17 is mounted on the upper end of the fixing shaft 16. The pin 18 is fixed to the upper end of the positioning block 15. The presser foot plate 4 is provided with a mounting hole 20 and a positioning groove 21. The pin 18 cooperates with the mounting hole 20 and is connected to the pin 18 by passing through the presser foot plate 4 with a fastener. The positioning block 17 engages with the positioning groove 21 of the presser foot plate 4. The pressure foot plate is installed using a fixed shaft, a fixed block, a positioning block, a pin, and fasteners. The fixed shaft is mounted on a bracket. During lifting, the second lifting block drives the fixed block to rise and fall, thereby causing the fixed shaft to rise and fall along the bracket. This ensures good lifting stability. The pressure foot plate is positioned by engaging with the positioning block through a positioning groove. The mounting hole structure, pin, and fasteners secure the plate. This design facilitates positioning and installation, offering high installation reliability, strong connection stability, and high robustness, thus effectively improving performance.

[0032] In this invention, as shown in the figure, the feeding stepper motor 12 is connected to the rotating arm 13 via a linkage assembly. The linkage assembly includes a swing block 22 and a positioning ring 23. The positioning ring 23 has two positioning holes 24, in which a first bearing 25 and a second bearing 26 are respectively installed. One end of the swing block 22 is connected to the feeding stepper motor 12, and the other end cooperates with the first bearing 25 through a first connecting shaft 27. The rotating arm 13 cooperates with the second bearing 26 through a second connecting shaft 28. The feeding stepper motor 12 is connected to the rotating arm 13 via the linkage assembly, which consists of a swing block 22 and a positioning ring 23. The positioning ring has a figure-eight structure with two positioning holes, in which bearings are installed. It is connected to the rotating arm and the swing block through the connecting shaft. By using the linkage assembly to drive the swing of the swing block, which in turn drives the pulling and pushing of the connecting rod, the linkage of the overall structure is effectively improved, resulting in better reliability, higher accuracy, greater flexibility, and improved performance.

[0033] In this invention, as shown in the figure, the lifting mechanism includes a lifting member 29, an elastic rocker 30, a slider 31, and a lifting guide rail 32, as well as a mounting plate 33. The cam lifting mechanism and the feeding mechanism are mounted on the mounting plate 33. The lifting guide rail 32 is fixed to the bracket 2. The slider 31 is fixed to the mounting plate 33 and slides in cooperation with the lifting guide rail 32. One end of the elastic rocker 30 is hinged to the housing 1, and the other end is located at the lower end of the mounting plate 33. The lifting member 29 is mounted on the housing 1 and cooperates with the elastic rocker 30. By setting an mounting plate, the cam lifting mechanism and the feeding mechanism are installed on the mounting plate 33, so that the pressure foot plate and the lifting tooth can move up and down along the bracket together with the cam lifting mechanism and the feeding mechanism via the lifting mechanism. This results in better overall integrity and a more compact installation structure. The lifting mechanism includes a connection structure of lifting component 29, elastic rocker 30, slider 31, and lifting guide rail 32 to lift the mounting plate. The lifting component serves as a power source, which can be a power source such as a cylinder to achieve the lifting purpose. One end of the elastic rocker 30 is hinged. The other end of the elastic rocker 30 contacts the lower end of the mounting plate. The middle part of the elastic rocker 30 cooperates with the lifting component. In use, the lifting component pushes the elastic rocker 30 upward along the hinge point to push the cam lifting mechanism, feeding mechanism, lifting teeth and presser foot plate on the mounting plate to rise, so that the presser foot plate and needle plate clamp the sewing material for hooking. With the elastic rocker 30, the presser foot plate can be pressed down to take out the material. After releasing, the whole can be reset under the action of the elastic rocker. It is convenient to use, has rich functions, high reliability and strong stability.

[0034] In this invention, as shown in the figure, the bracket 2 is provided with a limiting block 34, and the mounting plate 33 slides along the lifting guide rail 32 to form a limiting engagement with the limiting block 34. By setting the limiting block, the movement trajectory of the mounting plate during lifting can be effectively and accurately limited, resulting in higher accuracy and improved safety.

[0035] In this invention, as shown in the figure, the pressure foot plate 4 is provided with a strip groove 35. The lifting tooth 5 rises or falls through the strip groove 35, and the feeding mechanism 32 can drive the lifting tooth to move along the strip groove. By setting the strip groove, there are three strip grooves. The lifting tooth is provided with three racks corresponding to the strip grooves. The three racks are arranged in parallel, with the racks on both sides being longer and the middle one being shorter. The corresponding strip grooves are also arranged in the same way. By setting the strip groove, the lifting tooth passes through the strip groove to clamp the material when rising and passes through the strip groove when falling. The pressure foot plate rises, and the lifting tooth falls below the pressure foot plate. The lifting tooth can also move along the strip groove to feed the material. Therefore, by setting the strip groove, the lifting tooth and the pressure foot plate can achieve the purpose of cross-interchange between rising and falling. The structure is compact and reliable. It can also guide and position the lifting tooth, making the action more reasonable and reliable. The three-strip groove combined with the three-rack distribution structure can improve the reliability during feeding, maintain the flatness of the material, and effectively prevent wrinkles.

[0036] In this invention, as shown in the figure, the presser foot plate 4 is provided with anti-slip teeth 36. By setting the anti-slip grooves, the positioning is more secure when the presser foot plate and the needle plate clamp the material, ensuring the stability of the hook needle and improving processing efficiency and quality.

[0037] In this invention, as shown in the figure, a material-blocking boss 37 is provided below the strip groove of the pressure foot plate 4. By providing a material-blocking boss below the strip groove of the pressure foot plate, the purpose of material blocking can be effectively achieved, so that the unloaded material falls downward under the action of the material-blocking boss, preventing it from moving upward and affecting the processing.

Claims

1. A feed device for a pry sewing machine, comprising a housing (1), a bracket (2), a needle plate (3), and a lifting mechanism, wherein the bracket (2) and the lifting mechanism are mounted on the housing (1), and the needle plate (3) is located at the upper end of the housing (1), characterized in that: The system includes a cam lifting mechanism, a feeding mechanism, a presser foot plate (4), and a lifting tooth (5). The lifting mechanism can drive the cam lifting mechanism and the feeding mechanism to rise and fall along the bracket (2). The presser foot plate (4) is located below the needle plate (3) and is connected to the cam lifting mechanism. The lifting tooth (5) is installed below the presser foot plate (4) and is connected to the cam lifting mechanism. The feeding mechanism is connected to the lifting tooth (5). The lifting mechanism drives the lifting tooth (5) and the presser foot plate (4) to rise or fall through the cam lifting mechanism and the feeding mechanism. The cam lifting mechanism simultaneously drives the presser foot plate and the lifting tooth to move in opposite directions. The feeding mechanism... The lifting mechanism drives the lifting tooth to move back and forth. The lifting mechanism drives the presser foot plate (4) to rise and contact the needle plate (3) to clamp the sewing material for hooking. The cam lifting mechanism drives the lifting tooth (5) to rise and press against the needle plate (3) to clamp the sewing material. At the same time, the cam lifting mechanism drives the presser foot plate (4) to fall away from the needle plate (3). The feeding mechanism drives the lifting tooth (5) to move to the left to feed the sewing material. The cam lifting mechanism drives the lifting tooth (5) to fall. At the same time, the presser foot plate (4) rises to clamp the sewing material for hooking. The feeding mechanism drives the lifting tooth (5) to move to the right.

2. The feed device for a pry-sewing machine according to claim 1, characterized in that: The cam lifting mechanism includes a lifting stepper motor (6), a rotating shaft (7), a first eccentric wheel (8), a first lifting block (9), a second eccentric wheel (10), and a second lifting block (11). The lifting stepper motor (6) drives the rotating shaft (7) to rotate. The first eccentric wheel (8) and the second eccentric wheel (10) are axially arranged on the rotating shaft (7). The first lifting block (9) and the second lifting block (11) are vertical and parallel to each other. The lower end of the first lifting block (9) is sleeved on the first eccentric wheel (8) to form a cam eccentric fit. The upper end of the first lifting block (9) is hinged to the lifting tooth (5), and the lower end of the second lifting block (11) is sleeved on the second eccentric wheel (10) to form a cam eccentric fit. The upper end of the second lifting block (11) is hinged to the pressure foot plate (4). The lifting stepper motor (6) rotates to drive the rotating shaft (7) to rotate. The rotating shaft (7) drives the first eccentric wheel (8) and the second eccentric wheel (10) to rotate. The first eccentric wheel (8) and the second eccentric wheel (10) respectively drive the first lifting block (9) and the second lifting block (11) to move in opposite directions.

3. The feed device for a pry-sewing machine according to claim 2, characterized in that: The feeding mechanism includes a feeding stepper motor (12), a rotating arm (13), and a connecting rod (14). The feeding stepper motor (12) drives the rotating arm (13) to rotate. The rotating arm (13) is hinged. One end of the connecting rod (14) is hinged to the rotating arm (13), and the other end is hinged to the upper end of the first lifting block (9). The lifting tooth (5) is installed on the connecting rod (14).

4. The feed device for a pry-sewing machine according to claim 2, characterized in that: The presser foot plate (4) is connected to the second lifting block (11) through a fixing component. The fixing component includes a fixing block (15), a fixing shaft (16), a positioning block (17), a pin (18), and a fastener (19). The fixing block (15) is hinged to the upper end of the second lifting block (11). The lower end of the fixing shaft (16) is installed on the fixing block (15). The positioning block (17) is installed on the upper end of the fixing shaft (16). The pin (18) is fixed to the upper end of the positioning block (17). The presser foot plate (4) is provided with a mounting hole (20) and a positioning groove (21). The pin (18) cooperates with the mounting hole (20) and is connected to the pin (18) through the presser foot plate (4) by the fastener. The positioning block (17) engages with the positioning groove (21) of the presser foot plate (4).

5. The feed device for a pry-sewing machine according to claim 3, characterized in that: The feeding stepper motor (12) is connected to the rotating arm (13) through a linkage assembly. The linkage assembly includes a swing block (22) and a positioning ring (23). The positioning ring (23) has two positioning holes (24). A first bearing (25) and a second bearing (26) are respectively provided in the positioning holes (24). One end of the swing block (22) is connected to the feeding stepper motor (12), and the other end is engaged with the first bearing (25) through a first connecting shaft (27). The rotating arm (13) is engaged with the second bearing (26) through a second connecting shaft (28).

6. A feeder device for a pry-sewing machine according to claim 1, 2, 3, 4, or 5, characterized in that: The lifting mechanism includes a lifting component (29), an elastic rocker (30), a slider (31), and a lifting guide rail (32), and also includes a mounting plate (33). The cam lifting mechanism and the feeding mechanism are mounted on the mounting plate (33). The lifting guide rail (32) is fixed on the bracket (2). The slider (31) is fixed on the mounting plate (33) and slides in cooperation with the lifting guide rail (32). One end of the elastic rocker (30) is hinged to the housing (1), and the other end is located at the lower end of the mounting plate (33). The lifting component (29) is mounted on the housing (1) and cooperates with the elastic rocker (30).

7. The feed device for a pry-sewing machine according to claim 6, characterized in that: The bracket (2) is provided with a limiting block (34), and the mounting plate (33) slides along the lifting guide rail (32) to form a limiting engagement with the limiting block (34).

8. A feeder device for a pry-sewing machine according to claim 1, 2, 3, 4, or 5, characterized in that: The presser foot plate (4) is provided with a strip groove (35). The lifting tooth (5) rises or falls through the strip groove (35). The feeding mechanism can drive the lifting tooth (5) to move along the strip groove (35).

9. A feeder device for a pry-sewing machine according to claim 1, 2, 3, 4, or 5, characterized in that: The presser foot plate (4) is provided with anti-slip teeth (36).

10. The feeder device for a pry-sewing machine according to claim 8, characterized in that: The presser foot plate (4) has a material-stopping boss (37) below the strip groove (35).

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