Computer embroidery machine with dynamic holding mechanism and working method thereof

Abstract

The present invention discloses a computer embroidery machine with a dynamic holding mechanism and a working method thereof, which relates to the technical field of computer embroidery machines, and comprises a shuttle box body component and a dynamic holding mechanism; the shuttle box body component comprises a shuttle box with a needle plate, and a fixed knife and a movable knife arranged in the shuttle box, and a needle plate hole is arranged on the needle plate; the dynamic holding mechanism is arranged in the shuttle box, and the dynamic holding mechanism comprises a holding piece, a paddle, a torsion spring and a mounting pin located on the back side of the needle plate, the mounting pin is fixedly connected to the back side of the needle plate, the paddle is rotatably sleeved on the mounting pin, the torsion spring is arranged between the needle plate and the paddle to provide a restoring force to the paddle, the paddle is connected to the holding piece, and a center hole is arranged at one end of the holding piece; when the movable knife is opened relative to the fixed knife, the movable knife drives the paddle to rotate around the mounting pin, and at the same time, the paddle drives the holding piece to move linearly toward the needle plate hole until the center hole is aligned with the needle plate hole. The present invention can simplify the structure of the embroidery machine and reduce the cost while improving the embroidery quality and efficiency of the embroidery machine.

Description

Technical Field

[0001] The invention relates to the technical field of computer embroidery machines, and more particularly to a computer embroidery machine with a dynamic holding mechanism and a working method thereof. Background Art

[0002] The working principle of the computer embroidery machine is that the upper thread and the lower thread cooperate to finally draw the embroidery pattern on the fabric. At present, when the embroidery machine starts embroidery, it is necessary to bring the embroidery upper thread into the shuttle box through the needle, and the rotary shuttle separates the upper thread and cooperates with the lower thread to tie a knot, and finally realizes the embroidery action. However, the embroidery action of the existing embroidery machine has the following defects: 1. When embroidering, if the upper thread is not long enough or the tension is not enough, it is easy for the first stitch to not be in place, and it is easy to not be able to bring up the lower thread, which will cause the upper thread and the lower thread to be unable to form a knot, and finally lead to the reduction of the quality of the embroidery pattern; 2. The embroidery machine will not be in place if the needle is not in place, which will cause missed stitches or it will take several stitches to bring up the lower thread, which will lead to reduced efficiency and quality.

[0003] Patent Zl201220744040.3 discloses a thread catcher for an embroidery machine, comprising an electromagnet and a return spring, characterized in that the thread catcher for the embroidery machine also comprises a thread catcher spring and a drive plate, the thread catcher spring is connected to the drive plate, the drive plate is connected to the electromagnet, a waist-shaped spring hole is arranged at the top of the thread catcher spring, and a return spring is arranged on the drive plate. The thread catcher for the embroidery machine drives the thread catcher spring to pull and press the upper thread end to the back of the needle plate by energizing and de-energizing the electromagnet, thereby ensuring that the upper thread and the lower thread can be smoothly knotted. However, the embroidery machine needs to be provided with a special electromagnet as a driving mechanism to drive the thread catcher spring to capture the upper thread, which has a complex structure and requires additional driving costs. Summary of the invention

[0004] The purpose of the present invention is to make up for the defects of the prior art and provide a computer embroidery machine with a dynamic holding mechanism and a working method thereof, which can improve the embroidery quality and efficiency of the embroidery machine while simplifying the structure of the embroidery machine and reducing the cost.

[0005] The embodiment of the present invention provides a computer embroidery machine with a dynamic holding mechanism, comprising: a shuttle box body component and a dynamic holding mechanism; the shuttle box body component comprises a shuttle box with a needle plate and a fixed knife and a movable knife arranged in the shuttle box, and the needle plate is provided with a needle plate hole; the dynamic holding mechanism is arranged in the shuttle box, and the dynamic holding mechanism comprises a holding piece, a paddle, a torsion spring and a mounting pin located on the back side of the needle plate, the mounting pin is fixedly connected to the back side of the needle plate, the paddle is rotatably sleeved on the mounting pin, and the torsion spring is arranged between the needle plate and the The paddles are provided with a restoring force, the paddles are connected to the retaining sheet, and a center hole is provided at one end of the retaining sheet; when the movable knife opens a first angle relative to the fixed knife, the movable knife is connected to the paddle, and when the movable knife continues to open relative to the fixed knife, the movable knife drives the paddle to rotate around the mounting pin, and at the same time, the paddle drives the retaining sheet to make linear motion toward the needle plate hole, until the movable knife opens a second angle relative to the fixed knife, and the center hole is aligned with the needle plate hole, and the second angle is greater than the first angle.

[0006] Optionally, the paddle includes a first sheet, a second sheet and a third sheet, the second sheet and the third sheet are respectively connected to the first sheet, the first sheet is rotatably mounted on the mounting pin, the second sheet is connected to the retaining sheet, the movable knife is connected to the third sheet to drive the paddle to rotate around the mounting pin, so that the second sheet drives the retaining sheet to perform linear motion.

[0007] Optionally, a protrusion is provided on the third sheet, and the movable knife is connected to the protrusion to drive the third sheet.

[0008] Optionally, a fork column is provided in the middle of the retaining sheet, and a fork opening is provided at one end of the second sheet away from the first sheet, and the fork column is fitted and placed in the fork opening.

[0009] Optionally, a guide seat is fixedly connected to the back side of the needle plate, a guide groove is provided on the surface of the guide seat that is in contact with the back side of the needle plate, and the other end of the retaining plate passes through the guide groove and can move linearly along the guide groove; a guide pin is fixedly connected to the back side of the needle plate, a guide hole is provided in the middle of the retaining plate, and the guide pin passes through the guide hole and can move linearly along the guide hole.

[0010] Optionally, a limiting sleeve is further included, wherein the limiting sleeve is fixed to the outer end of the mounting pin to limit the axial movement of the torsion spring and the first sheet along the mounting pin.

[0011] Optionally, a retaining spring is also included, which is clamped on the outer end of the guide pin to limit the axial movement of the retaining plate along the guide pin.

[0012] Optionally, one end of the retaining sheet is provided with an opening communicating with the central hole.

[0013] Optionally, the retaining sheet includes a retaining sheet body and a retaining sheet front section embedded on one end of the retaining sheet body, the center hole and the opening are both provided on the retaining sheet front section, and the retaining sheet front section is made of elastic material.

[0014] The embodiment of the present invention further provides a working method of a computer embroidery machine with a dynamic holding mechanism, wherein the computer embroidery machine with a dynamic holding mechanism is the computer embroidery machine with a dynamic holding mechanism as described above, and comprises the following steps:

[0015] S1, before the embroidery needle inserts the first stitch, the movable knife continues to open from the position at the first angle relative to the fixed knife, drives the paddle to rotate around the mounting pin, the paddle drives the retaining plate to move linearly toward the needle plate hole, and the movable knife stops when it moves to the second angle relative to the fixed knife;

[0016] S2, the embroidery needle passes through the needle plate hole and the first needle under the center hole, the bottom thread and the surface thread move in coordination, the embroidery needle rises to the surface of the needle plate, the movable knife moves back to a position at a first angle relative to the fixed knife, the retaining sheet is retracted under the restoring force of the torsion spring, and the surface thread is retained on the retaining sheet;

[0017] S3, the embroidery needle circulates until the embroidery is completed, the movable knife retracts and moves to close with the fixed knife to complete the thread cutting action, and the movable knife opens and moves to a position with a first angle relative to the fixed knife.

[0018] The embroidery machine provided by the embodiment of the present invention drives the holding piece of the dynamic holding mechanism to make reciprocating linear motion through the existing moving knife of the shuttle box body component, and does not need to set up a special driving mechanism to drive the holding piece to capture the upper thread, thereby eliminating the need for an additional driving mechanism, and has a simple structure, does not require additional driving costs, and can reduce costs. At the same time, when the embroidery needle starts to sew, the holding piece of the dynamic holding mechanism can pull and press the upper thread end to the back of the needle plate, thereby improving the success rate of the embroidery machine starting to sew and knotting, and improving the embroidery efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solution of the present invention, the accompanying drawings required for use in the description of the invention are briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0020] Figure 1 A partial structural schematic diagram of a computer embroidery machine provided in an embodiment of the present invention.

[0021] Figure 2 A perspective view of a computer embroidery machine provided by an embodiment of the present invention when the movable knife and the fixed knife are closed.

[0022] Figure 3 A perspective view of a dynamic holding mechanism within a needle plate according to an embodiment of the present invention.

[0023] Figure 4 A perspective view of a computer embroidery machine provided by an embodiment of the present invention when the movable knife is opened at a first angle relative to the fixed knife.

[0024] Figure 5 A perspective view of a computer embroidery machine provided by an embodiment of the present invention when the movable knife is opened at a second angle relative to the fixed knife.

[0025] Figure 6 A schematic structural diagram of a paddle provided in an embodiment of the present invention.

[0026] Figure 7 A bottom view of the mechanical dynamic holding mechanism provided in an embodiment of the present invention.

[0027] Figure 8 An exploded view of a dynamic retaining mechanism provided in an embodiment of the present invention.

[0028] Fig. 9 A schematic structural diagram of a guide seat provided in an embodiment of the present invention.

[0029] Fig.10 A top view of a first retaining sheet provided in an embodiment of the present invention.

[0030] Fig.11 A top view of a second retaining sheet provided in an embodiment of the present invention.

[0031] Fig.12 A top view of a third retaining sheet provided in an embodiment of the present invention.

[0032] Fig.13 A front view of a third retaining sheet provided in an embodiment of the present invention.

[0033] Fig.14 This is an exploded view of a fourth retaining sheet provided in an embodiment of the present invention.

[0034] Fig.15 A schematic structural diagram of a fourth retaining sheet provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0035] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings of the present invention. Obviously, the described embodiments are 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 creative work should fall within the scope of protection of the present invention.

[0036] like Figure 1-5 As shown, the embodiment of the present invention provides a computer embroidery machine 10 with a dynamic holding mechanism, including: a shuttle box body 100 and a dynamic holding mechanism 200. The computer embroidery machine 10 also includes other mechanisms (not shown in the figure), such as an embroidery machine head, etc. The embroidery machine head controls the movement of the embroidery needle, and the prior art in this field will not be described in detail here.

[0037] The shuttle box body 100 includes a shuttle box 1000 having a needle plate 1010, and a fixed knife 1100 and a movable knife 1200 disposed in the shuttle box 1000. The needle plate 1010 is provided with a needle plate hole 1011. The movable knife 1200 can rotate to open and close relative to the fixed knife 1100, and the movable knife 1200 can complete the thread cutting action when it is closed relative to the fixed knife 1100. The needle plate hole 1011 on the needle plate 1010 allows the embroidery needle to enter and exit the shuttle box 1000 for embroidery.

[0038] The dynamic holding mechanism 200 is disposed in the shuttle box 1000 , and includes a holding piece 2100 , a paddle 2200 , a torsion spring 2300 , and a mounting pin 2400 located on the back side of the needle plate 1010 .

[0039] The mounting pin 2400 is fixedly connected to the back of the needle plate 1010, and the paddle 2200 is rotatably sleeved on the mounting pin 2400. The paddle 2200 is connected to the retaining plate 2100, and a center hole 2110 is provided at one end of the retaining plate 2100. The mounting pin 2400 is used to mount the paddle 2200, position the paddle 2200, and limit the radial movement of the paddle 2200 along the mounting pin 2400. The mounting pin 2400 can be integrally formed with the needle plate 1010, or the mounting pin 2400 and the needle plate 1010 can be separately manufactured and fixedly connected together by welding, threaded connection, etc. The paddle 2200 is used to drive the retaining plate 2100 to move, and the center hole 2110 is used for the embroidery needle to pass through when starting the first stitch.

[0040] When the movable knife 1200 is opened at a first angle relative to the fixed knife 1100, the movable knife 1200 is connected to the paddle 2200. When the movable knife 1200 continues to be opened relative to the fixed knife 1100, the movable knife 1200 drives the paddle 2200 to rotate around the mounting pin 2400. At the same time, the paddle 2200 drives the retaining plate 2100 to make linear motion toward the needle plate hole 1011, until the movable knife 1200 is opened at a second angle relative to the fixed knife 1100, the center hole 2110 is aligned with the needle plate hole 1011, so that the embroidery needle can pass the surface thread through the needle plate hole 1011 and the center hole 2110 and bring it into the shuttle box 1000 when starting to embroider. The second angle is greater than the first angle. The first angle is the angle at which the movable knife 1200 rotates from the position closed with the fixed knife 1100 to the position connected with the paddle 2200, and the second angle is the angle at which the movable knife 1200 rotates from the position closed with the fixed knife 1100 to the position where the center hole 2110 is aligned with the needle plate hole 1011.

[0041] The torsion spring 2300 is arranged between the needle plate 1010 and the paddle 2200 to provide a restoring force to the paddle 2200. After the embroidery needle starts to rise and leave the needle plate 1010, the movable knife 1200 moves back to a position where it opens at a first angle relative to the fixed knife 1100, and the force exerted by the movable knife 1200 on the paddle 2200 is cancelled. The paddle 2200 rotates under the restoring force of the torsion spring 2300, and drives the retaining plate 2100 to retract and reset in a linear motion. The upper thread end is pulled and pressed against the back of the needle plate 1010 by the retaining plate 2100, thereby improving the success rate of starting and tying a knot in the embroidery machine 10 and improving the embroidery efficiency.

[0042] The embroidery machine 10 provided by the embodiment of the present invention drives the retaining piece 2100 of the dynamic retaining mechanism 200 to make reciprocating linear motion through the existing movable knife 1200 of the shuttle box body 100, and does not need to set up a special driving mechanism to drive the retaining piece 2100 to capture the surface thread, thereby eliminating the need for an additional driving mechanism, and having a simple structure, without requiring additional driving costs, and thus reducing costs. At the same time, when the embroidery needle starts to sew, the retaining piece 2100 of the dynamic retaining mechanism 200 can pull and press the surface thread end onto the back of the needle plate 1010, thereby improving the success rate of starting to sew and knotting of the embroidery machine 10, and improving the embroidery efficiency.

[0043] As a preferred implementation of the embodiment of the present invention, Figure 6-8As shown, the paddle 2200 includes a first sheet 2210, a second sheet 2220 and a third sheet 2230, the second sheet 2220 and the third sheet 2230 are respectively connected to the first sheet 2210, the first sheet 2210 is rotatably mounted on the mounting pin 2400, the second sheet 2220 is connected to the retaining sheet 2100, the movable knife 1200 is connected to the third sheet 2230 and drives the paddle 2200 to rotate around the mounting pin 2400, so that the second sheet 2220 drives the retaining sheet 2100 to perform linear motion. In this embodiment, the paddle 2200 includes a first sheet 2210, a second sheet 2220 and a third sheet 2230. The first sheet 2210 can rotate around the mounting pin 2400, the second sheet 2220 is connected to the retaining sheet 2100 to drive the retaining sheet, and the movable knife 1200 is connected to the third sheet 2230 to drive the third sheet 2230. The structure is simple and reliable.

[0044] As a preferred implementation of the embodiment of the present invention, Figure 6 As shown, the third sheet 2230 is provided with a protrusion 2231, and the movable knife 1200 acts on the protrusion 2231 to drive the third sheet 2230. In this embodiment, the movable knife 1200 drives the paddle 2200 to rotate by driving the protrusion 2231, so that the movable knife and the third sheet 2230 are connected to generate a force.

[0045] As a preferred implementation of the embodiment of the present invention, Figure 6-8 As shown, a fork column 2120 is provided in the middle of the retaining sheet 2100, and a fork opening 2221 is provided at one end of the second sheet 2220 away from the first sheet 2210, and the fork column 2120 is fitted into the fork opening 2221. In this embodiment, by providing a connecting structure of the fork column 2120 and the fork opening 2221 between the retaining sheet 2100 and the second sheet 2220, the second sheet 2220 can stably and reliably drive the retaining sheet 2100 to perform linear reciprocating motion.

[0046] As a preferred implementation of the embodiment of the present invention, Figure 6-9As shown, the dynamic holding mechanism 200 further includes a guide seat 2500 and a guide pin 2600. The back of the needle plate 1010 is fixedly connected to the guide seat 2500. A guide groove 2510 is provided on the side of the guide seat 2500 that is in contact with the back of the needle plate 1010. The other end of the holding piece 2100 passes through the guide groove 2510 and can move linearly along the guide groove 2510. The back of the needle plate 1010 is fixedly connected to the guide pin 2600. A guide hole 2130 is provided in the middle of the holding piece 2100. The guide pin 2600 passes through the guide hole 2130 and can move linearly along the guide hole 2130. The guide pin 2600 can be integrally formed with the needle plate 1010, or the guide pin 2600 and the needle plate 1010 can be separately formed and fixedly connected together by welding, threaded connection, etc. In this embodiment, a guide seat 2500 is provided which is in contact with the back side of the needle plate 1010, and a guide groove 2510 which cooperates with the retaining plate 2100 is provided on the side of the guide seat 2500 which is in contact with the back side of the needle plate 1010, so that the guide seat 2500 can guide the retaining plate 2100 to make linear motion. At the same time, a guide pin 2600 is provided for guidance, which can enhance the guiding effect of the linear motion of the retaining plate 2100.

[0047] As a further improved implementation of the embodiment of the present invention, Figure 5 , 7 As shown in , 8, when the retaining sheet 2100 moves linearly to the position where the center hole 2110 is aligned with the needle plate hole 1011, the guide pin 2600 abuts against the wall of the retaining sheet 2100 located in the guide hole 2130 to limit further movement of the retaining sheet 2100. In this embodiment, the guide hole 2130 further positions the guide pin 2600, so that the center hole 2110 and the needle plate hole 1011 can be accurately aligned.

[0048] As a preferred implementation of the embodiment of the present invention, Figure 6-8 As shown, the torsion spring 2300 is sleeved on the mounting pin 2400, one end of the torsion spring 2300 is fixed to the back of the needle plate 1010, and the other end of the torsion spring 2300 is hooked on the second sheet 2220. In this embodiment, the torsion spring 2300 is also sleeved on the mounting pin 2400, the overall structure is compact, and can also provide a stable restoring force to the paddle 2200.

[0049] As a preferred implementation of the embodiment of the present invention, Figure 6-8As shown, the dynamic holding mechanism 200 further includes a limiting sleeve 2700, which is fixed to the outer end of the mounting pin 2400 to limit the axial movement of the torsion spring 2300 and the first sheet 2210 along the mounting pin 2400. In this embodiment, the limiting sleeve 2700 can stably and reliably mount the torsion spring 2300 and the paddle 2200 on the mounting pin 2400.

[0050] As an optional implementation of the embodiment of the present invention, the limiting sleeve 2700 is threadedly matched with the mounting pin 2400. In this embodiment, the limiting sleeve 2700 is threadedly connected with the mounting pin 2400, which is convenient for fixing and disassembly.

[0051] As a preferred implementation of the embodiment of the present invention, Figure 6-8 As shown, it also includes a retaining spring 2800, which is clamped on the outer end of the guide pin 2600 to limit the axial movement of the retaining sheet 2100 along the guide pin 2600. In this embodiment, the retaining spring 2800 limits the axial movement of the retaining sheet 2100 along the guide pin 2600, which can ensure that the retaining sheet 2100 can reliably perform linear movement.

[0052] As a preferred implementation of the embodiment of the present invention, Figure 10-13 As shown, one end of the retaining sheet 2100 is provided with an opening 2140 communicating with the central hole 2110. The opening 2140 may be provided at the center of one end of the retaining sheet 2100 or at the side of the center of one end of the retaining sheet 2100. The opening 2140 may be perpendicular to the retaining sheet 2100 or may be inclined relative to the retaining sheet 2100. In this embodiment, the opening 2140 may prevent the upper thread from being too long and unable to be pulled out after the first stitch of embroidery, resulting in the long upper thread being brought back into the fabric, repeated embroidery, and reduced embroidery quality.

[0053] As a further improved implementation of the embodiment of the present invention, Fig.14 , 15As shown, the retaining sheet 2100 includes a retaining sheet body 2150 and a retaining sheet front section 2160 embedded and fixed on one end of the retaining sheet body 2150, the fork column 2120 is arranged in the middle of the retaining sheet body 2150, the guide hole 2130 is arranged on the retaining sheet body 2150 and located between the fork column 2120 and one end of the retaining sheet body 2150, the center hole 2110 and the opening 2140 are both arranged on the retaining sheet front section 2160, and the retaining sheet front section 2160 is made of elastic materials such as rubber or plastic. The opening 2140 can be arranged at the center of the front end of the retaining sheet front section 2160, or at the side of the center of the front end of the retaining sheet front section 2160, the opening 2140 can be perpendicular to the retaining sheet front section 2160, or the opening 2140 can be arranged obliquely relative to the retaining sheet front section 2160. In this embodiment, the retaining sheet front section 2160 made of plastic or rubber has a certain elasticity, which is more conducive to the detachment of the face line.

[0054] The embodiment of the present invention further provides a working method of a computer embroidery machine with a dynamic holding mechanism, wherein the computer embroidery machine with a dynamic holding mechanism is the computer embroidery machine 10 with a dynamic holding mechanism as described above. Figure 1-5 As shown, the following steps are included:

[0055] S1, before the embroidery needle inserts the first stitch, the movable knife 1200 continues to open from the position at the first angle relative to the fixed knife 1100, drives the paddle 2200 to rotate around the mounting pin 2400, and the paddle 2200 drives the retaining plate 2100 to move linearly toward the needle plate hole 1011, and the movable knife 1200 stops when it moves to the second angle relative to the fixed knife 1100;

[0056] S2, the embroidery needle passes through the needle plate hole 1011 and the first needle under the center hole 2110, the bottom thread and the surface thread move in coordination, the embroidery needle rises to the surface of the needle plate 1010, the movable knife 1200 moves back to a position at a first angle relative to the fixed knife 1100, the retaining sheet 2100 is retracted under the restoring force of the torsion spring 2300, and the surface thread is retained on the retaining sheet 2100;

[0057] S3, the embroidery needle circulates until the embroidery is completed, the movable knife 1200 retracts and moves to close with the fixed knife 1100 to complete the thread cutting action, and the movable knife 1200 opens and moves to a position at a first angle relative to the fixed knife 1100.

[0058] The working method of the embroidery machine provided by the embodiment of the present invention drives the retaining piece 2100 of the dynamic retaining mechanism 200 to make reciprocating linear motion through the existing movable knife 1200 of the shuttle box body 100, and does not need to set up a special driving mechanism to drive the retaining piece 2100 to capture the surface thread, thereby eliminating the need for an additional driving mechanism, and having a simple structure, without requiring additional driving costs, and thus reducing costs. At the same time, when the embroidery needle starts to sew, the retaining piece 2100 of the dynamic retaining mechanism 200 can pull and press the surface thread end onto the back of the needle plate 1010, thereby improving the success rate of starting to sew and tying knots in the embroidery machine 10, and improving the embroidery efficiency.

[0059] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed by the present invention, and these modifications or replacements should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention shall be based on the protection scope of the claims.

Claims

1. A computer embroidery machine with a dynamic holding mechanism, characterized in that: include: The shuttle box body component and dynamic holding mechanism; the shuttle box body component comprises a shuttle box with a needle plate, and a fixed knife and a movable knife arranged in the shuttle box, and the needle plate is provided with a needle plate hole; the dynamic holding mechanism is arranged in the shuttle box, and the dynamic holding mechanism comprises a holding piece, a paddle, a torsion spring and a mounting pin located on the back side of the needle plate, the mounting pin is fixedly connected to the back side of the needle plate, the paddle is rotatably sleeved on the mounting pin, the torsion spring is arranged between the needle plate and the paddle to provide a restoring force to the paddle, the paddle is connected to the holding piece, and one end of the holding piece is provided with a center hole; when the movable knife opens a first angle relative to the fixed knife, the movable knife is connected to the paddle, and when the movable knife continues to open relative to the fixed knife, the movable knife drives the paddle to rotate around the mounting pin, and at the same time, the paddle drives the holding piece to perform linear movement toward the needle plate hole, until the movable knife opens a second angle relative to the fixed knife, the center hole is aligned with the needle plate hole, and the second angle is greater than the first angle; The paddle includes a first sheet, a second sheet and a third sheet, the second sheet and the third sheet are respectively connected to the first sheet, the first sheet is rotatably mounted on the mounting pin, the second sheet is connected to the retaining sheet, the movable knife is connected to the third sheet to drive the paddle to rotate around the mounting pin, so that the second sheet drives the retaining sheet to perform linear motion.

2. The computer embroidery machine with a dynamic holding mechanism according to claim 1, characterized in that: The third sheet body is provided with a protrusion, and the movable knife is connected with the protrusion to drive the third sheet body.

3. The computer embroidery machine with a dynamic holding mechanism according to claim 1, characterized in that: A fork column is arranged in the middle of the retaining sheet, and a fork opening is arranged at one end of the second sheet body away from the first sheet body, and the fork column is fitted and placed in the fork opening.

4. The computer embroidery machine with a dynamic holding mechanism according to claim 1, characterized in that: A guide seat is fixedly connected to the back side of the needle plate, and a guide groove is provided on the surface of the guide seat that is in contact with the back side of the needle plate, and the other end of the retaining plate passes through the guide groove and moves linearly along the guide groove; a guide pin is fixedly connected to the back side of the needle plate, and a guide hole is provided in the middle of the retaining plate, and the guide pin passes through the guide hole and moves linearly along the guide hole.

5. The computer embroidery machine with a dynamic holding mechanism according to claim 1, characterized in that: It also includes a limiting sleeve, which is fixed to the outer end of the mounting pin to limit the axial movement of the torsion spring and the first sheet along the mounting pin.

6. The computer embroidery machine with a dynamic holding mechanism according to claim 4, characterized in that: It also includes a retaining spring, which is mounted on the outer end of the guide pin to limit the axial movement of the retaining plate along the guide pin.

7. The computer embroidery machine with a dynamic holding mechanism according to claim 1, characterized in that: One end of the retaining sheet is provided with an opening communicated with the central hole.

8. The computer embroidery machine with a dynamic holding mechanism according to claim 7, characterized in that: The retaining sheet comprises a retaining sheet body and a retaining sheet front section embedded on one end of the retaining sheet body, the central hole and the opening are both arranged on the retaining sheet front section, and the retaining sheet front section is made of elastic material.

9. A working method of a computer embroidery machine with a dynamic holding mechanism, wherein the computer embroidery machine with a dynamic holding mechanism is a computer embroidery machine with a dynamic holding mechanism as claimed in any one of claims 1 to 8, characterized in that: The steps include: S1, before the embroidery needle inserts the first stitch, the movable knife continues to open from the position at the first angle relative to the fixed knife, drives the paddle to rotate around the mounting pin, the paddle drives the retaining plate to move linearly toward the needle plate hole, and the movable knife stops when it moves to the second angle relative to the fixed knife; S2, the embroidery needle passes through the needle plate hole and the first needle under the center hole, the bottom thread and the surface thread move in coordination, the embroidery needle rises to the surface of the needle plate, the movable knife moves back to a position at a first angle relative to the fixed knife, the retaining sheet is retracted under the restoring force of the torsion spring, and the surface thread is retained on the retaining sheet; S3, the embroidery needle circulates until the embroidery is completed, the movable knife retracts and moves to close with the fixed knife to complete the thread cutting action, and the movable knife opens and moves to a position with a first angle relative to the fixed knife.

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