Sewing Machine

Abstract

The invention provides a sewing machine, which is provided with a stitch length adjusting mechanism capable of adjusting the sewing stitch length of the sewing machine. The stitch length adjusting mechanism comprises: a presser foot driving component, on which the presser foot of the sewing machine is mounted, so as to drive the presser foot to move along a predetermined sewing trajectory through the presser foot driving component; a feeding component, on which the feeding tooth of the sewing machine is mounted, so as to drive the feeding tooth to move along a predetermined feeding direction through the feeding component; and a swinging member, one end of the swinging member is connected to the presser foot driving component, and the other end of the swinging member is connected to the feeding member, so as to drive the presser foot and the feeding tooth to move relative to each other by making the swinging member swing around a predetermined axis, and to adjust the movement stroke of the presser foot and the feeding tooth by adjusting the swing stroke of the swinging member to adjust the sewing stitch length of the sewing machine, so as to solve the problem of low working efficiency of the sewing machine in the prior art.

Description

Technical Field

[0001] The present invention relates to the technical field of sewing machines, in particular to a sewing machine. Background Art

[0002] When sewing leather and thick materials, it is often encountered that a certain section of sewing involves the phenomenon of changing the stitch length, or the stitch length needs to be changed after changing a fabric. In the prior art, this stitch length is mostly changed by a mechanical structure.

[0003] However, changing the stitch length when switching fabrics still requires manual adjustment, which reduces the working efficiency of the sewing machine. Summary of the invention

[0004] The main purpose of the present invention is to provide a sewing machine to solve the problem of low working efficiency of sewing machines in the prior art.

[0005] In order to achieve the above-mentioned purpose, the present invention provides a sewing machine, having a stitch length adjustment mechanism capable of adjusting the sewing stitch length of the sewing machine, the stitch length adjustment mechanism comprising: a presser foot driving component, on which the presser foot of the sewing machine is mounted, so as to drive the presser foot to move along a predetermined sewing trajectory through the presser foot driving component; a feeding component, on which the feed tooth of the sewing machine is mounted, so as to drive the feed tooth to move along a predetermined feeding direction through the feed component; a swinging member, one end of the swinging member is connected to the presser foot driving component, and the other end of the swinging member is connected to the feeding member, so as to drive the presser foot and the feed tooth to move relative to each other by swinging the swinging member around a predetermined axis, and to adjust the movement stroke of the presser foot and the feed tooth by adjusting the swinging stroke of the swinging member to adjust the sewing stitch length of the sewing machine.

[0006] Furthermore, the sewing machine also includes: a power assembly, the power assembly includes an eccentric connecting rod, one end of the eccentric connecting rod is provided with an eccentric hole, at least a portion of the upper shaft of the sewing machine is inserted into the eccentric hole to be driven and connected to the eccentric connecting rod, so that the eccentric connecting rod is driven to swing back and forth in a predetermined direction by rotating the upper shaft; the other end of the eccentric connecting rod is driven and connected to the swinging member, so that the swinging stroke of the swinging member can be adjusted by adjusting the distance between the center line of the eccentric hole and the center line of the shaft of the upper shaft.

[0007] Furthermore, the sewing machine also includes: an adjustment component, the adjustment component includes an adjustment seat, the adjustment seat is connected to the end of the eccentric connecting rod away from the upper shaft, so as to drive the eccentric connecting rod to move in the vertical direction by rotating the adjustment seat around a predetermined axis to adjust the distance between the center line of the eccentric hole and the axis center line of the upper shaft.

[0008] Furthermore, the adjustment assembly also includes: a first connecting rod group, at least a portion of which is connected to the eccentric connecting rod via a connecting pin, and an end of the first connecting rod group away from the connecting pin is connected to the adjustment seat so that the adjustment seat drives the eccentric connecting rod to move through the first connecting rod group.

[0009] Furthermore, the adjustment assembly also includes: a second connecting rod group, at least part of which is installed on the connecting pin, and one end of the second connecting rod group away from the connecting pin is hinged to the swing member so that the eccentric connecting rod drives the swing member to move through the second connecting rod group.

[0010] Furthermore, the adjustment assembly also includes: a driving device, which is drivingly connected to the adjustment seat and is used to drive the adjustment seat to rotate around a predetermined axis at a predetermined angle.

[0011] Furthermore, the power assembly also includes: an eccentric block, which is sleeved on the upper shaft, and an eccentric connecting rod is sleeved on the eccentric block through an eccentric hole, so that at least part of the hole wall of the eccentric hole abuts against the circumferential surface of the eccentric block, so that the eccentric connecting rod is driven to swing back and forth in a predetermined direction through the circular motion of the eccentric block.

[0012] Furthermore, the presser foot driving component includes: a swing needle shaft, the swinging member is drivingly connected to the swing needle shaft; a presser foot shaft, the presser foot is installed at the end of the presser foot shaft to drive the presser foot to move through the presser foot shaft; the end of the presser foot shaft away from the presser foot is connected to the swing needle shaft, so that the swing needle shaft drives the presser foot to move through the presser foot shaft.

[0013] Furthermore, the feeding component includes: a tooth-lifting shaft, a swinging part drivingly connected to the tooth-lifting shaft; a feeding tooth rack, on which the feeding tooth is mounted, and an end of the tooth-lifting shaft away from the swinging part drivingly connected to the feeding tooth rack, so that the tooth-lifting shaft drives the feeding tooth to move through the feeding tooth rack.

[0014] Furthermore, the feeding component also includes: a first connecting member, the first connecting member and the swinging member are both rod bodies, one end of the first connecting member is hinged to the swinging member, and a first predetermined angle is set between the rod body of the first connecting member and the rod body of the swinging member; a second connecting member, the second connecting member is a rod body, the other end of the first connecting member is hinged to the second connecting member, one end of the second connecting member away from the first connecting member is drive-connected to the tooth-lifting shaft, and a second predetermined angle is set between the rod body of the second connecting member and the rod body of the first connecting member, so that the swinging member drives the tooth-lifting shaft to rotate around the predetermined axis through the first connecting member and the second connecting member.

[0015] Furthermore, the feeding component also includes: a second connecting frame, one end of the second connecting frame is fixedly connected to the tooth lifting shaft, and the other end of the second connecting frame is hinged to the feeding tooth frame, so that when the tooth lifting shaft moves around the predetermined axis, the feeding tooth frame is driven by the second connecting frame to move along a predetermined trajectory.

[0016] By applying the technical solution of the present invention, a sewing machine is provided with a stitch length adjusting mechanism capable of adjusting the sewing stitch length of the sewing machine, the stitch length adjusting mechanism comprising a presser foot driving component, a feeding component and a swinging component, the presser foot of the sewing machine is installed on the presser foot driving component so as to drive the presser foot to move along a predetermined sewing trajectory through the presser foot driving component, the feeding tooth of the sewing machine is installed on the feeding component so as to drive the feeding tooth to move along a predetermined feeding direction through the feeding component, one end of the swinging component is connected to the presser foot driving component, and the other end of the swinging component is connected to the feeding component so as to drive the presser foot and the feeding tooth to move relative to each other by making the swinging component swing around a predetermined axis, and to adjust the movement stroke of the presser foot and the feeding tooth by adjusting the swing stroke of the swinging component so as to adjust the sewing stitch length of the sewing machine, the structure is simple and easy to install, and the sewing stitch length of the sewing machine can be independently adjusted, and when the stitch length needs to be adjusted, there is no need to stop the sewing machine, thereby solving the problem of low working efficiency of the sewing machine in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0018] Figure 1 A schematic structural diagram showing an embodiment of a sewing machine according to the present invention; and

[0019] Figure 2 A schematic structural diagram of an embodiment of an adjustment assembly according to the present invention is shown.

[0020] The above drawings include the following reference numerals:

[0021] 10. Presser foot driving component; 11. Presser foot; 12. Swing needle shaft; 13. Presser foot shaft; 14. First connecting frame;

[0022] 20. Feeding component; 21. Feeding tooth; 22. Tooth lifting shaft; 23. Feeding tooth frame; 24. First connecting piece; 25. Second connecting piece; 26. Second connecting frame;

[0023] 30. Swinging piece;

[0024] 40. Adjustment assembly; 41. Adjustment seat; 42. First connecting rod group; 420. First end; 421. Second end; 43. Second connecting rod group; 44. Connecting pin; 45. Driving device; 46. Mounting plate; 47. Coupling;

[0025] 50. Power assembly; 51. Eccentric connecting rod; 510. Eccentric hole; 52. Eccentric block;

[0026] 60. Upper axis. DETAILED DESCRIPTION

[0027] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0028] The present invention provides a sewing machine, please refer to Figure 1 and Figure 2 , having a stitch length adjustment mechanism capable of adjusting the sewing stitch length of the sewing machine, the stitch length adjustment mechanism comprising: a presser foot driving component 10, on which a presser foot 11 of the sewing machine is mounted, so as to drive the presser foot 11 to move along a predetermined sewing trajectory through the presser foot driving component 10; a feeding component 20, on which a feed tooth 21 of the sewing machine is mounted, so as to drive the feed tooth 21 to move along a predetermined feeding direction through the feed component 20; a swinging member 30, one end of the swinging member 30 is connected to the presser foot driving component 10, and the other end of the swinging member 30 is connected to the feeding member 20, so as to drive the presser foot 11 and the feed tooth 21 to move relative to each other by swinging the swinging member 30 around a predetermined axis, and to adjust the movement stroke of the presser foot 11 and the feed tooth 21 by adjusting the swing stroke of the swinging member 30 to adjust the sewing stitch length of the sewing machine.

[0029] According to the sewing machine provided by the present invention, there is a stitch length adjustment mechanism capable of adjusting the sewing stitch length of the sewing machine, the stitch length adjustment mechanism comprises a presser foot driving component 10, a feeding component 20 and a swinging member 30, a presser foot 11 of the sewing machine is installed on the presser foot driving component 10, so that the presser foot 11 is driven by the presser foot driving component 10 to move along a predetermined sewing track, a feeding tooth 21 of the sewing machine is installed on the feeding component 20, so that the feeding tooth 21 is driven by the feeding component 20 to move along a predetermined feeding direction, and one end of the swinging member 30 is connected to the presser foot driving component 10. The movable part 10 is connected, and the other end of the swinging part 30 is connected to the feeding part 20, so as to drive the presser foot 11 and the feed dog 21 to move relative to each other by making the swinging part 30 swing around a predetermined axis, and the movement stroke of the presser foot 11 and the feed dog 21 is adjusted by adjusting the swinging stroke of the swinging part 30 to adjust the sewing stitch length of the sewing machine. The structure is simple and easy to install, and the sewing stitch length of the sewing machine can be adjusted independently. When the stitch length needs to be adjusted, there is no need to stop the sewing machine, which solves the problem of low working efficiency of the sewing machine in the prior art.

[0030] Specifically, the sewing machine also includes: a power component 50, the power component 50 includes an eccentric connecting rod 51, one end of the eccentric connecting rod 51 is provided with an eccentric hole 510, at least a portion of the upper shaft 60 of the sewing machine is inserted into the eccentric hole 510 to be driven and connected to the eccentric connecting rod 51, so that the eccentric connecting rod 51 is driven to swing back and forth in a predetermined direction by rotating the upper shaft 60; the other end of the eccentric connecting rod 51 is driven and connected to the swinging member 30, so that the swinging stroke of the swinging member 30 is adjusted by adjusting the distance between the center line of the eccentric hole 510 and the axis center line of the upper shaft 60, and the swinging member 30 is driven to swing by the power component 50, so that the presser foot 11 and the feed dog 21 can move relatively synchronously during normal sewing.

[0031] In order to facilitate the adjustment of the swing stroke of the swing member 30, the sewing machine also includes: an adjustment component 40, the adjustment component 40 includes an adjustment seat 41, the adjustment seat 41 is connected to the end of the eccentric connecting rod 51 away from the upper shaft 60, so as to drive the eccentric connecting rod 51 to move in the vertical direction by rotating the adjustment seat 41 around a predetermined axis to adjust the distance between the center line of the eccentric hole 510 and the axis line of the upper shaft 60. It should be noted that when the upper shaft 60 rotates in the eccentric hole 510, the distance between the center line of the eccentric hole 510 and the axis line of the upper shaft 60 will produce a cyclic change with the rotation of the upper shaft 60, so that the upper shaft 60 drives the eccentric connecting rod 51 to swing.

[0032] Furthermore, if Figure 2 As shown, the adjustment assembly 40 also includes: a first connecting rod group 42, at least a portion of the first connecting rod group 42 is connected to the eccentric connecting rod 51 through a connecting pin 44, and one end of the first connecting rod group 42 away from the connecting pin 44 is connected to the adjustment seat 41, so that the adjustment seat 41 drives the eccentric connecting rod 51 to move through the first connecting rod group 42; specifically, the first end 420 of the first connecting rod group 42 is connected to the connecting pin 44, and the second end 421 of the first connecting rod group 42 is connected to the adjustment seat 41, so that the adjustment seat 41 drives the eccentric connecting rod 51 to move through the first connecting rod group 42.

[0033] Preferably, the adjustment seat 41 includes a first connecting plate and a second connecting plate that are relatively arranged, the first connecting plate and the second connecting plate are connected by a third connecting plate, and the first connecting plate, the second connecting plate and the third connecting plate constitute an installation area, and the first connecting rod group 42, the second connecting rod group 43 and the connecting pin 44 are all installed in the installation area; wherein, the first connecting rod group 42 includes a first connecting rod and a second connecting rod, the first connecting rod is connected to the first connecting plate, and the second connecting rod is connected to the second connecting plate, so as to drive the first connecting rod group 42 to move more smoothly when adjusting the adjustment seat 41, thereby ensuring the stability of the presser foot 11 and the feed dog 21 when adjusting the sewing stitch length.

[0034] Specifically, the adjustment assembly 40 also includes: a second connecting rod group 43, at least a portion of the second connecting rod group 43 is installed on the connecting pin 44, and one end of the second connecting rod group 43 away from the connecting pin 44 is hinged to the swing member 30, so that the eccentric connecting rod 51 drives the swing member 30 to move through the second connecting rod group 43; wherein, the second connecting rod group 43 includes a third connecting rod and a fourth connecting rod, and the third connecting rod and the fourth connecting rod are respectively connected to both sides of the swing member 30, so that the swing member 30 can move more smoothly during the transmission process.

[0035] In a specific implementation, the adjustment component 40 also includes: a driving device 45, which is drivingly connected to the adjustment seat 41 to drive the adjustment seat 41 to rotate a predetermined angle around a predetermined axis. The driving device 45 is preferably a driving motor, and the driving device 45 is installed on the body of the sewing machine through a mounting plate 46. The driving shaft of the driving motor is drivingly connected to the adjustment seat 41 through a coupling 47.

[0036] In order to further improve the transmission performance of the eccentric connecting rod 51, the power assembly 50 also includes: an eccentric block 52, which is sleeved on the upper shaft 60, and the eccentric connecting rod 51 is sleeved on the eccentric block 52 through the eccentric hole 510, so that at least part of the hole wall of the eccentric hole 510 abuts against the circumferential surface of the eccentric block 52, so that the eccentric connecting rod 51 is driven to swing back and forth in a predetermined direction through the circular motion of the eccentric block 52.

[0037] In the embodiment provided by the present invention, the presser foot driving component 10 includes: a swing needle shaft 12, the swing member 30 is drivingly connected to the swing needle shaft 12; a presser foot shaft 13, the presser foot 11 is installed at the end of the presser foot shaft 13, so as to drive the presser foot 11 to move through the presser foot shaft 13; the end of the presser foot shaft 13 away from the presser foot 11 is connected to the swing needle shaft 12, so that the swing needle shaft 12 drives the presser foot 11 to move through the presser foot shaft 13.

[0038] Among them, the presser foot driving component 10 also includes a first connecting frame 14, at least part of which is connected to the oscillating needle shaft 12, and a first mounting hole is provided on the first connecting frame 14. One end of the presser foot shaft 13 away from the presser foot 11 is at least partially inserted into the first mounting hole and connected to the first connecting frame 14. The oscillating needle shaft 12 drives the presser foot shaft 13 to move in a predetermined direction through the first connecting frame 14.

[0039] In the embodiment provided by the present invention, the feeding component 20 includes: a tooth-lifting shaft 22, a swinging member 30 drivingly connected to the tooth-lifting shaft 22; a feeding tooth rack 23, on which the feeding tooth 21 is installed, and one end of the tooth-lifting shaft 22 away from the swinging member 30 drivingly connected to the feeding tooth rack 23, so that the tooth-lifting shaft 22 drives the feeding tooth 21 to move through the feeding tooth rack 23.

[0040] Specifically, the feeding component 20 also includes: a first connecting member 24, the first connecting member 24 and the swinging member 30 are both rod bodies, one end of the first connecting member 24 is hinged to the swinging member 30, and a first predetermined angle is set between the rod body of the first connecting member 24 and the rod body of the swinging member 30; a second connecting member 25, the second connecting member 25 is a rod body, the other end of the first connecting member 24 is hinged to the second connecting member 25, and one end of the second connecting member 25 away from the first connecting member 24 is drivingly connected to the tooth lifting shaft 22, and a second predetermined angle is set between the rod body of the second connecting member 25 and the rod body of the first connecting member 24, so that the swinging member 30 drives the tooth lifting shaft 22 to rotate around the predetermined axis through the first connecting member 24 and the second connecting member 25.

[0041] The feeding component 20 also includes: a second connecting frame 26, one end of the second connecting frame 26 is fixedly connected to the tooth lifting shaft 22, and the other end of the second connecting frame 26 is hinged to the feeding tooth frame 23, so that when the tooth lifting shaft 22 moves around a predetermined axis, the feeding tooth frame 23 is driven by the second connecting frame 26 to move along a predetermined trajectory.

[0042] From the above description, it can be seen that the above embodiments of the present invention achieve the following technical effects:

[0043] The sewing machine provided by the present invention has a stitch length adjustment mechanism capable of adjusting the sewing stitch length of the sewing machine, wherein the stitch length adjustment mechanism comprises a presser foot driving component 10, a feeding component 20 and a swinging member 30, wherein a presser foot 11 of the sewing machine is installed on the presser foot driving component 10, so that the presser foot 11 is driven by the presser foot driving component 10 to move along a predetermined sewing track, a feeding tooth 21 of the sewing machine is installed on the feeding component 20, so that the feeding tooth 21 is driven by the feeding component 20 to move along a predetermined feeding direction, one end of the swinging member 30 is connected to the presser foot driving component 10, and the swinging member 30 is connected to the presser foot driving component 10. The other end of the movable member 30 is connected to the feeding component 20 so as to drive the presser foot 11 and the feed dog 21 to move relative to each other by making the swinging member 30 swing around a predetermined axis, and the movement stroke of the presser foot 11 and the feed dog 21 is adjusted by adjusting the swinging stroke of the swinging member 30 to adjust the sewing stitch length of the sewing machine. The structure is simple and easy to install. By adjusting the rotation angle of the driving shaft of the driving motor, the sewing stitch length of the sewing machine can be independently adjusted. When the stitch length needs to be adjusted, there is no need to stop the sewing machine, thereby solving the problem of low working efficiency of the sewing machine in the prior art.

[0044] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A sewing machine having a stitch length adjustment mechanism capable of adjusting the sewing stitch length of the sewing machine, characterized in that: The needle distance adjustment mechanism comprises: A presser foot driving component (10), wherein the presser foot (11) of the sewing machine is mounted on the presser foot driving component (10), so that the presser foot (11) is driven by the presser foot driving component (10) to move along a predetermined sewing trajectory; A feeding component (20), wherein a feeding tooth (21) of the sewing machine is mounted on the feeding component (20), so that the feeding tooth (21) is driven by the feeding component (20) to move along a predetermined feeding direction; A swinging member (30), one end of the swinging member (30) is connected to the presser foot driving member (10), and the other end of the swinging member (30) is connected to the feeding member (20), so as to drive the presser foot (11) and the feeding tooth (21) to move relative to each other by swinging the swinging member (30) around a predetermined axis, and to adjust the movement stroke of the presser foot (11) and the feeding tooth (21) by adjusting the swinging stroke of the swinging member (30) to adjust the sewing stitch length of the sewing machine; The sewing machine further comprises: a power assembly (50), the power assembly (50) comprising an eccentric connecting rod (51), one end of the eccentric connecting rod (51) being provided with an eccentric hole (510), at least a portion of an upper shaft (60) of the sewing machine being inserted into the eccentric hole (510) so as to be drivingly connected to the eccentric connecting rod (51), so as to rotate the upper shaft (60) and drive the eccentric connecting rod (51) to swing back and forth in a predetermined direction; The other end of the eccentric connecting rod (51) is drivingly connected to the swing member (30) so as to adjust the swing stroke of the swing member (30) by adjusting the distance between the hole center line of the eccentric hole (510) and the axis center line of the upper shaft (60); The sewing machine further comprises: an adjustment assembly (40), the adjustment assembly (40) comprising an adjustment seat (41), the adjustment seat (41) being connected to an end of the eccentric connecting rod (51) away from the upper shaft (60), so as to drive the eccentric connecting rod (51) to move in a vertical direction by rotating the adjustment seat (41) around a predetermined axis, thereby adjusting the distance between the centerline of the eccentric hole (510) and the axisline of the upper shaft (60); The adjustment assembly (40) further comprises: a first connecting rod group (42), at least a portion of the first connecting rod group (42) being connected to the eccentric connecting rod (51) via a connecting pin (44), and an end of the first connecting rod group (42) away from the connecting pin (44) being connected to the adjustment seat (41), so that the adjustment seat (41) drives the eccentric connecting rod (51) to move via the first connecting rod group (42); The adjustment assembly (40) further comprises: a second connecting rod group (43), at least a portion of which is mounted on the connecting pin (44), and an end of the second connecting rod group (43) away from the connecting pin (44) is hingedly connected to the swing member (30), so that the eccentric connecting rod (51) drives the swing member (30) to move via the second connecting rod group (43); The power assembly (50) further comprises an eccentric block (52), wherein the eccentric block (52) is sleeved on the upper shaft (60), and the eccentric connecting rod (51) is sleeved on the eccentric block (52) through the eccentric hole (510), so that at least a portion of the hole wall of the eccentric hole (510) abuts against the circumferential surface of the eccentric block (52), so that the eccentric connecting rod (51) is driven to swing back and forth in a predetermined direction through the circular motion of the eccentric block (52).

2. The sewing machine according to claim 1, characterized in that: The adjustment component (40) further comprises: A driving device (45), the driving device (45) is drivingly connected to the adjustment seat (41) and is used to drive the adjustment seat (41) to rotate around a predetermined axis at a predetermined angle.

3. The sewing machine according to claim 1, characterized in that: The presser foot driving component (10) comprises: A swing needle shaft (12), wherein the swing member (30) is drivingly connected to the swing needle shaft (12); A presser foot shaft (13), the presser foot (11) being mounted at the end of the presser foot shaft (13) so as to drive the presser foot (11) to move via the presser foot shaft (13); an end of the presser foot shaft (13) away from the presser foot (11) is connected to the swing needle shaft (12) so that the swing needle shaft (12) drives the presser foot (11) to move via the presser foot shaft (13).

4. The sewing machine according to claim 1, characterized in that: The feeding component (20) comprises: A tooth lifting shaft (22), wherein the swinging member (30) is drivingly connected to the tooth lifting shaft (22); A feed tooth frame (23), the feed tooth (21) being mounted on the feed tooth frame (23), and one end of the tooth lifting shaft (22) away from the swinging member (30) being drivingly connected to the feed tooth frame (23), so that the tooth lifting shaft (22) drives the feed tooth (21) to move via the feed tooth frame (23).

5. The sewing machine according to claim 4, characterized in that The feeding component (20) further comprises: a first connecting member (24), wherein the first connecting member (24) and the swinging member (30) are both rod bodies, one end of the first connecting member (24) is hinged to the swinging member (30), and a first predetermined angle is provided between the rod body of the first connecting member (24) and the rod body of the swinging member (30); The second connecting member (25) is a rod body, the other end of the first connecting member (24) is hinged to the second connecting member (25), the end of the second connecting member (25) away from the first connecting member (24) is drivingly connected to the tooth lifting shaft (22), and a second predetermined angle is set between the rod body of the second connecting member (25) and the rod body of the first connecting member (24), so that the swinging member (30) drives the tooth lifting shaft (22) to rotate around a predetermined axis through the first connecting member (24) and the second connecting member (25).

6. The sewing machine according to claim 5, characterized in that The feeding component (20) further comprises: A second connecting frame (26), one end of the second connecting frame (26) is fixedly connected to the tooth-lifting shaft (22), and the other end of the second connecting frame (26) is hinged to the feeding tooth frame (23), so that when the tooth-lifting shaft (22) moves around a predetermined axis, the feeding tooth frame (23) is driven by the second connecting frame (26) to move along a predetermined trajectory.

Images