Cutting mechanism and sewing machine

Abstract

This invention provides a cutting mechanism and a sewing machine. The cutting mechanism includes a frame and a fixed blade fixedly mounted on the frame; it also includes a cutting shaft rotatably mounted on the frame, with a cutting holder fixedly mounted at one end of the cutting shaft, and a moving blade mounted on the cutting holder; and a lifting gear shaft rotatably mounted on the frame, connected to the cutting shaft via a first transmission mechanism. The first transmission mechanism includes an adjusting crank rotatably mounted on the lifting gear shaft, connected to the lifting gear shaft via an adjusting mechanism. The adjusting mechanism includes an adjusting sleeve slidably mounted on the lifting gear shaft, with an elastic element between the adjusting sleeve and the lifting gear shaft. The elastic element causes the adjusting sleeve to abut against the adjusting crank, and the adjusting crank and adjusting sleeve are engaged and connected. By engaging or disengaging the adjusting sleeve and adjusting crank, the rotation of the lifting gear shaft can drive or not drive the adjusting sleeve to rotate, eliminating the need to disassemble the moving blade and allowing for switching between operating states with and without a cutting blade, reducing equipment limitations and improving work efficiency.

Description

Technical Field

[0001] This invention relates to the field of textile equipment technology, and in particular to a cutting mechanism and a sewing machine. Background Technology

[0002] Nowadays, sewing machines have more and more functions, and multi-functionality has become a trend and a point of competition among brands.

[0003] In the existing technology, the covert sewing machine with a cutter has limited garment processing due to the presence of the cutter. If the machine is to be used for multiple purposes and perform other processes, the cutter must be removed. However, after removing the cutter, the requirements for the cutter's engagement amount, engagement angle, and engagement force are quite high, making reassembly complicated. The efficiency of switching between working states with and without a cutter is low, resulting in significant limitations. Summary of the Invention

[0004] In view of the shortcomings of the prior art, the purpose of this invention is to provide a cutting mechanism that solves the technical problem of inconvenient disassembly and assembly of the cutting mechanism of a sewing machine in the prior art.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solution: a cutting mechanism applied to a sewing machine, comprising: a frame; a fixed-blade mechanism, the fixed-blade mechanism including a fixed-blade seat disposed on the frame and a fixed blade fixedly disposed on the fixed-blade seat; a moving-blade mechanism, the moving-blade mechanism including a cutting shaft rotatably disposed on the frame, a cutting blade holder fixedly disposed at one end of the cutting shaft, and a moving blade disposed on the cutting blade holder; a driving mechanism, the driving mechanism including a lifting tooth shaft rotatably disposed on the frame, the lifting tooth shaft being connected to the cutting shaft through a first transmission mechanism, the first transmission mechanism including an adjusting crank rotatably disposed on the lifting tooth shaft, the adjusting crank being connected to the lifting tooth shaft through an adjusting mechanism, the adjusting mechanism including an adjusting sleeve slidably disposed on the lifting tooth shaft, an elastic element being disposed between the adjusting sleeve and the lifting tooth shaft, the elastic element causing the adjusting sleeve to abut against the adjusting crank, and the adjusting crank and the adjusting sleeve being inserted and engaged.

[0006] According to one aspect of the above technical solution, the adjustment mechanism further includes an adjustment wrench rotatably disposed on one side of the frame, the adjustment wrench having a connecting shaft extending toward the interior of the frame, one end of the connecting shaft having a wedge-shaped block, and the outer wall of the adjustment sleeve extending toward the wedge-shaped block having a contact portion.

[0007] According to one aspect of the above technical solution, a flat key protrudes from the outer wall of the tooth-lifting shaft, and a keyway corresponding to the flat key is opened on the adjusting sleeve.

[0008] According to one aspect of the above technical solution, the adjusting sleeve has a protrusion at one end near the adjusting crank, and the adjusting crank has a slot corresponding to the protrusion.

[0009] According to one aspect of the above technical solution, the protrusion is provided with a guide on the side near the slot, and the slot is provided with a chamfer on the side near the protrusion.

[0010] According to one aspect of the above technical solution, the cutting mechanism further includes a reset mechanism, which includes a torsion spring disposed between the frame and the adjusting crank.

[0011] According to one aspect of the above technical solution, the first transmission mechanism further includes a cutter crank fixedly disposed on the cutter shaft, and the cutter crank is connected to the adjusting crank via a cutter connecting rod.

[0012] According to one aspect of the above technical solution, the frame includes a frame body and a cutter seat disposed on one side of the frame body. The inner wall of the cutter seat is provided with a shock-absorbing pad, which is disposed between the cutter crank and the cutter seat.

[0013] According to one aspect of the above technical solution, the cutting mechanism further includes a main shaft rotatably disposed within the frame. The main shaft is connected to the tooth-lifting shaft via a second transmission mechanism. The second transmission mechanism includes a feed eccentric wheel fixedly disposed on the main shaft. A tooth-lifting connecting rod is provided on the feed eccentric wheel. A tooth-lifting crank connected to the tooth-lifting connecting rod is fixedly disposed on the tooth-lifting shaft.

[0014] Another aspect of the present invention provides a sewing machine including the cutting mechanism described above.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: By providing a first transmission mechanism between the tooth-lifting shaft and the cutter shaft, the rotation of the tooth-lifting shaft drives the rotation of the cutter shaft via the first transmission mechanism. Specifically, the first transmission mechanism includes an adjusting crank rotatably mounted on the tooth-lifting shaft, meaning that the rotation of the tooth-lifting shaft does not directly drive the adjusting crank. Simultaneously, an adjusting mechanism is provided between the first transmission mechanism and the tooth-lifting shaft. This adjusting mechanism specifically includes an adjusting sleeve slidably mounted on the tooth-lifting shaft. An elastic element is provided between the adjusting sleeve and the tooth-lifting shaft, causing the adjusting sleeve to abut against the adjusting crank. Simultaneously, the adjusting crank and the adjusting sleeve are connected in an insert-fitting manner, meaning that when the cutter is in the working state, the elastic element... The adjusting sleeve is fitted against and inserted into the adjusting crank. When the lifting shaft rotates, it drives the adjusting sleeve to rotate, which in turn drives the adjusting crank to rotate. The adjusting crank drives the cutter shaft to rotate through the first transmission mechanism, which in turn drives the moving blade on the cutter holder to swing. It then cooperates with the fixed blade fixed on the frame to complete the cutting action. When other processes are required, i.e. when the cutter is not needed, the adjusting sleeve can be separated from the adjusting crank. At this time, the elastic element is compressed, meaning that the rotation of the lifting shaft only drives the adjusting sleeve to rotate and does not drive the adjusting crank to swing, thus moving the moving blade. There is no need to disassemble the moving blade, which facilitates the switching between the operation state with and without the cutter and reduces the limitations of the equipment. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the cutting mechanism in the first embodiment of the present invention;

[0017] Figure 2 This is a schematic diagram of the fixed-blade mechanism, moving-blade mechanism, and driving mechanism in the first embodiment of the present invention;

[0018] Figure 3 This is a schematic diagram of the adjustment mechanism in the first embodiment of the present invention;

[0019] Figure 4 This is a partial structural assembly diagram of the adjustment mechanism in the first embodiment of the present invention;

[0020] Figure 5 This is a schematic diagram of the fixed-blade mechanism, the moving-blade mechanism, and the first transmission mechanism in the first embodiment of the present invention;

[0021] Figure 6 This is a schematic diagram of the structure of the cutter holder, shock absorber, cutter shaft, and cutter crank in the first embodiment of the present invention;

[0022] Figure 7 This is a partial structural schematic diagram of the adjustment mechanism in the second embodiment of the present invention;

[0023] Explanation of key component symbols:

[0024]

[0025]

[0026] The following detailed description, in conjunction with the accompanying drawings, will further illustrate the present invention. Detailed Implementation

[0027] To facilitate understanding of the present invention, a more complete description will be given below with reference to the accompanying drawings. Several embodiments of the invention are illustrated in the drawings. However, the invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

[0028] It should be noted that when a component is said to be "fixed to" another component, it can be directly on the other component or there may be an intervening component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there may be an intervening component. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0029] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0030] Please see Figures 1 to 6 The image shows a cutting mechanism according to a first embodiment of the present invention, comprising: a frame; a fixed blade mechanism, the fixed blade mechanism including a fixed blade seat 50 disposed on the frame and a fixed blade 51 fixedly disposed on the fixed blade seat 50; a moving blade mechanism, the moving blade mechanism including a cutting blade shaft 40 rotatably disposed on the frame, a cutting blade holder 43 fixedly disposed at one end of the cutting blade shaft 40, and a moving blade 44 disposed on the cutting blade holder 43; and a driving mechanism, the driving mechanism including a tooth lifting shaft 30 rotatably disposed on the frame, the tooth lifting shaft 30... The first transmission mechanism is connected to the cutter shaft 40. The first transmission mechanism includes an adjusting crank 33 rotatably mounted on the tooth lifting shaft 30. The adjusting crank 33 is connected to the tooth lifting shaft 30 through an adjusting mechanism. The adjusting mechanism includes an adjusting sleeve 31 slidably mounted on the tooth lifting shaft 30. An elastic element is provided between the adjusting sleeve 31 and the tooth lifting shaft 30. The elastic element causes the adjusting sleeve 31 to abut against the adjusting crank 33. The adjusting crank 33 and the adjusting sleeve 31 are inserted and engaged.

[0031] Specifically, in this embodiment, the cutting mechanism includes a first transmission mechanism between the tooth-lifting shaft 30 and the cutting shaft 40. The rotation of the tooth-lifting shaft 30 drives the rotation of the cutting shaft 40 via this first transmission mechanism. This first transmission mechanism specifically includes an adjusting crank 33 rotatably mounted on the tooth-lifting shaft 30, meaning the rotation of the tooth-lifting shaft 30 does not directly drive the adjusting crank 33. Simultaneously, an adjusting mechanism is provided between the first transmission mechanism and the tooth-lifting shaft 30. This adjusting mechanism specifically includes an adjusting sleeve 31 slidably mounted on the tooth-lifting shaft 30. An elastic element is provided between the adjusting sleeve 31 and the tooth-lifting shaft 30, causing the adjusting sleeve 31 to abut against the adjusting crank 33. The adjusting crank 33 and the adjusting sleeve 31 are also connected in a plug-in engagement. That is, when the cutting mechanism is in operation, the elastic element allows the cutting shaft 40 to rotate. The adjusting sleeve 31 abuts against and is inserted into the adjusting crank 33. When the lifting shaft 30 rotates, it drives the adjusting sleeve 31 to rotate, which in turn drives the adjusting crank 33 to rotate. The adjusting crank 33 drives the cutter shaft 40 to rotate through the first transmission mechanism, and further drives the moving blade 44 on the cutter holder 43 to swing. It cooperates with the fixed blade 51 fixed on the frame to complete the cutting action. When other processes are required, that is, when the cutter is not used, the adjusting sleeve 31 is separated from the adjusting crank 33. At this time, the elastic element is compressed. That is, the rotation of the lifting shaft 30 only drives the adjusting sleeve 31 to rotate, and does not drive the adjusting crank 33 to swing so that the moving blade 44 moves. There is no need to disassemble the moving blade 44, which facilitates the switching between the operation state with and without the cutter and reduces the limitations of the equipment.

[0032] To facilitate the movement of the adjustment sleeve 31 to switch the sewing machine between working states with and without a cutter, in this embodiment, the adjustment mechanism further includes an adjustment wrench 35 rotatably disposed on one side of the frame. The adjustment wrench 35 has a connecting shaft 36 extending toward the interior of the frame. One end of the connecting shaft 36 is provided with a wedge block 37, and the outer wall of the adjustment sleeve 31 extends toward the wedge block 37 to form a contact portion 31a.

[0033] Specifically, in order to ensure the sliding connection between the adjusting sleeve 31 and the tooth lifting shaft 30, and to make the adjusting sleeve 31 only able to slide relative to the tooth lifting shaft 30, a flat key 30a is provided on the outer wall of the tooth lifting shaft 30, and a keyway 31b corresponding to the flat key 30a is opened on the adjusting sleeve 31.

[0034] The engagement between the adjusting crank 33 and the adjusting sleeve 31 is primarily achieved through the cooperation of the slot 33a and the protrusion 31c. Specifically, in this embodiment, the adjusting sleeve 31 has a protrusion 31c at one end near the adjusting crank 33, and the adjusting crank 33 has a slot 33a corresponding to the protrusion 31c. It can be understood that in other embodiments of the present invention, the protrusion 31c may also be located on the adjusting crank 33, and the adjusting sleeve 31 may have a slot 33a corresponding to the protrusion 31c.

[0035] In addition, to ensure smooth engagement of the adjusting crank 33 and the adjusting sleeve 31, a guide portion is provided on the side of the protrusion 31c near the slot 33a, and a chamfer is provided on the side of the slot 33a near the protrusion 31c.

[0036] In this embodiment, the cutting mechanism further includes a reset mechanism, which includes a torsion spring 34 disposed between the frame and the adjusting crank 33. Understandably, when the torsion spring 34 is in its original state, i.e., without external force, the moving blade 44 on the cutting shaft 40 is located below the needle plate 12. When the moving blade 44 is above the needle plate 12, by rotating the adjusting wrench 35, the adjusting sleeve 31 is separated from the adjusting crank 33. Under the elastic deformation of the torsion spring 34, the cutting blade is positioned below the needle plate 12, completing the switch to the bladeless state.

[0037] Specifically, the first transmission mechanism further includes a cutter crank 41 fixedly mounted on the cutter shaft 40, and the cutter crank 41 is connected to the adjusting crank 33 via a cutter connecting rod 42. In this embodiment, the adjusting crank 33 is provided with a sliding groove 33b, and one end of the cutter connecting rod 42 can slide within the sliding groove 33b. When the adjusting crank 33 swings, the cutter crank 41 is swung by the cutter connecting rod 42, thereby driving the cutter shaft 40 to rotate, completing the transmission motion between the tooth lifting shaft 30 and the cutter shaft 40.

[0038] In this embodiment, the frame includes a frame body 10 and a cutter seat 11 disposed on one side of the frame body 10. To prevent the adjusting crank 33 from colliding with the inner wall of the cutter seat 11 due to the elastic force of the torsion spring 34 when the adjusting crank 33 separates from the adjusting sleeve 31, a shock-absorbing pad is provided on the inner wall of the cutter seat 11, and the shock-absorbing pad is disposed between the cutter crank 41 and the cutter seat 11. Furthermore, specifically, the cutter shaft 40 is rotatably mounted on the cutter seat 11, and the connecting shaft 36 is hinged to the cutter seat 11. Understandably, in this embodiment, the cutter seat 11 is also provided with a label, which corresponds to the handle of the adjusting wrench 35, and includes indicators for both the presence and absence of a cutter, facilitating user observation of the current operating status of the equipment.

[0039] Furthermore, the cutting mechanism also includes a main shaft 20 rotatably mounted within the frame. The main shaft 20 is connected to the lifting tooth shaft 30 via a second transmission mechanism. The second transmission mechanism includes a feed eccentric wheel 21 fixedly mounted on the main shaft 20. The feed eccentric wheel 21 is equipped with a lifting tooth connecting rod 22, and the lifting tooth shaft 30 is fixedly equipped with a lifting tooth crank 23 connected to the lifting tooth connecting rod 22. Specifically, the rotation of the main shaft 20, through the cooperation of the lifting tooth connecting rod 22 and the lifting tooth crank 23, drives the lifting tooth shaft 30 to swing, which in turn drives the moving knife 44 to swing via the first transmission mechanism, completing the fabric cutting operation with the fixed knife 51.

[0040] In some application scenarios of this embodiment, when the cutter is in operation, the adjusting sleeve 31 is engaged. Since the adjusting sleeve 31 and the lifting shaft 30 are connected by a flat key 30a, the oscillation of the lifting shaft 30 can be transmitted to the adjusting crank 33, and further to the moving blade 44, completing the cloth cutting function. At this time, the adjusting wrench 35 is biased to the left, and one plane of the wedge block 37 at the other end of the connecting shaft 36 contacts the contact portion 31a plane of the adjusting sleeve 31. Simultaneously, the elastic element at one end of the adjusting sleeve 31 can limit the adjustment wrench 35. Furthermore, in this embodiment, the aforementioned elastic element is a return spring 32 located between the adjusting sleeve 31 and the lifting shaft 30.

[0041] When it is necessary to adjust to the no-cutter state, the adjusting wrench 35 needs to be turned counterclockwise by 90 degrees. At this time, the wedge block 37 at one end of the connecting shaft 36 will push the adjusting sleeve 31 to move, thereby compressing the return spring 32 until the adjusting sleeve 31 separates from the adjusting crank 33, so that the swing of the adjusting sleeve 31 cannot be transmitted to the adjusting crank 33. Under the action of the crank return spring, the adjusting crank 33 rotates clockwise and drives the cutter connecting rod 42, the cutter shaft 40 and the moving blade 44 to move together. Finally, when the cutter crank 41 touches the anti-vibration pad 13, it stops moving. At this time, the moving blade 44 has been lower than the needle plate 12 and stops moving, completing the switch to the no-cutter state.

[0042] Furthermore, when switching back from the cutterless state to the cutter-equipped state, simply turn the adjusting wrench 35 clockwise by 90 degrees. At this time, under the action of the return spring 32, the adjusting sleeve 31 moves to the left, causing the protrusion 31c to abut against the side of the adjusting crank 33. Then, manually turn the main shaft 20 one revolution. When the adjusting sleeve 31 is rotated to a specific position, the protrusion 31c will automatically slide into the slot 33a of the adjusting crank 33, completing the engagement. Alternatively, first manually rotate the protrusion 31c of the adjusting sleeve 31 to the slot 33a position of the adjusting crank 33, and then turn the adjusting wrench 35 clockwise by 90 degrees to complete the engagement as well.

[0043] It should be noted that after the cutting mechanism in this embodiment switches from the no-cutting state back to the cutting-cutting state, the relative positions of the adjusting crank 33 and the lifting shaft 30, the relative positions of the cutting crank 41 and the cutting shaft 40, and the relative positions of the moving blade 44 and the cutting shaft 40 do not change. Therefore, the moving blade 44 can be used directly without re-adjustment, realizing a quick switch of equipment state, which is convenient for users and improves work efficiency.

[0044] In summary, the cutting mechanism in the above embodiments of the present invention includes an adjustment mechanism between the first transmission mechanism and the tooth-lifting shaft 30. This adjustment mechanism specifically includes an adjustment sleeve 31 slidably mounted on the tooth-lifting shaft 30. An elastic element is provided between the adjustment sleeve 31 and the tooth-lifting shaft 30, causing the adjustment sleeve 31 to abut against the adjustment crank 33. Simultaneously, the adjustment crank 33 and the adjustment sleeve 31 are plugged into each other. That is, when the cutting mechanism is in operation, the elastic element causes the adjustment sleeve 31 to abut against and be plugged into the adjustment crank 33. When the tooth-lifting shaft 30 rotates, it drives the adjustment sleeve 31 to rotate, further driving the adjustment crank 33 to rotate. The adjustment crank 33 then drives the cutting shaft 40 to rotate via the first transmission mechanism, further causing the moving blade 44 on the cutting blade holder 43 to swing, cooperating with the fixed blade 51 fixed on the frame to complete the cutting action. When other processes are required, i.e. when the cutter is not needed, simply separate the adjusting sleeve 31 from the adjusting crank 33. At this time, the elastic element is compressed, meaning that the rotation of the tooth lifting shaft 30 only drives the adjusting sleeve 31 to rotate, and does not cause the adjusting crank 33 to swing, thereby moving the moving blade 44. There is no need to disassemble the moving blade 44, which facilitates the switching between the working state with and without the cutter and reduces the limitations of the equipment. By setting the torsion spring 34, after the cutter mechanism switches from the state without the cutter to the state with the cutter, the relative positions of the adjusting crank 33 and the tooth lifting shaft 30, the relative positions of the cutter crank 41 and the cutter shaft 40, and the relative positions of the moving blade 44 and the cutter shaft 40 do not change. Therefore, the moving blade 44 can be used directly without readjustment, realizing the rapid switching of the equipment state, which is convenient for users and improves work efficiency.

[0045] Please see Figure 7 The second embodiment of the present invention also provides a cutting mechanism. The cutting mechanism in this embodiment differs from the cutting mechanism in the first embodiment in that the adjustment mechanism in this embodiment includes a push rod 61 slidably disposed on the cutting rod seat 11 and a contact block 62 disposed on one side of the push rod 61. The outer wall of the adjustment sleeve 31 extends toward the contact block to form a column 63. The switching between the presence and absence of a cutting tool is achieved by moving the push rod 61.

[0046] Understandably, in other embodiments of the present invention, to facilitate the switching of the state with and without a cutter, a cylinder or motor for driving the adjustment sleeve 31 to move can be provided. One end of the push rod 61 or connecting shaft 36 can be connected to the output end of the cylinder or motor. By providing a controller electrically connected to the cylinder or motor on the frame, and by setting a display screen or buttons, the switching of the state with and without a cutter can be completed by touching or pressing, thereby improving work efficiency.

[0047] The third embodiment of the present invention also provides a sewing machine, including the cutting mechanism in the above embodiments. In this embodiment, by setting the cutting mechanism, the sewing machine can switch between having a cutting mechanism and not having one at any time, achieving "multi-purpose use" and improving the practicality of the equipment.

[0048] In the description of this specification, references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0049] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention. Therefore, the scope of protection of this patent should be determined by the appended claims.

Claims

1. A cutting mechanism, characterized in that, include: frame; A fixed-blade mechanism, comprising a fixed-blade holder disposed on the frame and a fixed blade fixedly disposed on the fixed-blade holder; The moving blade mechanism includes a cutting shaft rotatably mounted on the frame, a cutting blade holder fixedly mounted at one end of the cutting shaft, and a moving blade mounted on the cutting blade holder; A drive mechanism includes a tooth-lifting shaft rotatably mounted on the frame. The tooth-lifting shaft is connected to the cutter shaft via a first transmission mechanism. The first transmission mechanism includes an adjusting crank rotatably mounted on the tooth-lifting shaft. The adjusting crank is connected to the tooth-lifting shaft via an adjusting mechanism. The adjusting mechanism includes an adjusting sleeve slidably mounted on the tooth-lifting shaft. An elastic element is provided between the adjusting sleeve and the tooth-lifting shaft. The elastic element causes the adjusting sleeve to abut against the adjusting crank. The adjusting crank and the adjusting sleeve are inserted and engaged in a fitting connection. The adjustment mechanism also includes a rotating adjustment wrench located on one side of the frame. The adjustment wrench has a connecting shaft extending toward the interior of the frame. One end of the connecting shaft is provided with a wedge-shaped block, and the outer wall of the adjustment sleeve extends toward the wedge-shaped block to form a contact portion.

2. The cutting mechanism according to claim 1, characterized in that, The outer wall of the tooth-lifting shaft is provided with a flat key, and the adjusting sleeve has a keyway corresponding to the flat key.

3. The cutting mechanism according to claim 1, characterized in that, The adjusting sleeve has a protrusion at one end near the adjusting crank, and the adjusting crank has a slot corresponding to the protrusion.

4. The cutting mechanism according to claim 3, characterized in that, The protrusion has a guide on the side near the slot, and the slot has a chamfer on the side near the protrusion.

5. The cutting mechanism according to claim 1, characterized in that, The cutting mechanism further includes a reset mechanism, which includes a torsion spring disposed between the frame and the adjusting crank.

6. The cutting mechanism according to claim 1, characterized in that, The first transmission mechanism also includes a cutter crank fixedly mounted on the cutter shaft, and the cutter crank is connected to the adjusting crank via a cutter connecting rod.

7. The cutting mechanism according to claim 6, characterized in that, The frame includes a frame body and a cutter seat located on one side of the frame body. The inner wall of the cutter seat is provided with a shock-absorbing pad, which is located between the cutter crank and the cutter seat.

8. The cutting mechanism according to any one of claims 1-7, characterized in that, The cutting mechanism also includes a main shaft rotatably disposed within the frame. The main shaft is connected to the tooth-lifting shaft via a second transmission mechanism. The second transmission mechanism includes a feed eccentric wheel fixedly disposed on the main shaft. The feed eccentric wheel is provided with a tooth-lifting connecting rod. The tooth-lifting shaft is fixedly provided with a tooth-lifting crank connected to the tooth-lifting connecting rod.

9. A sewing machine, characterized in that, Includes the cutting mechanism as described in any one of claims 1-8.

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