Sewing equipment and presser foot lifting mechanism

Abstract

The utility model discloses sewing equipment and a presser foot lifting mechanism, and relates to the technical field of sewing equipment. The presser foot lifting mechanism comprises an air cylinder, an air cylinder connecting block and a pull rod, the two ends of the air cylinder connecting block are a first end and a second end respectively in the axial direction of an air cylinder shaft of the air cylinder, the air cylinder shaft is fixedly connected with the end face of the first end, and a mounting plate is arranged on the end face of the second end in a protruding mode. One end of the pull rod and the mounting plate are arranged in parallel and fixedly connected, and the axis of the pull rod and the axis of the air cylinder shaft are collinear. The cylinder connecting block is connected with the pull rod through the mounting plate on the cylinder connecting block, the axis of the pull rod and the axis of the cylinder shaft are collinear, the pull rod can be prevented from forming a force arm relative to the cylinder shaft, the pull rod and the cylinder shaft cannot form torque relative to the cylinder body, and the possibility of mutual abrasion between the cylinder shaft and the cylinder body due to torsion can be reduced; and the service life of the cylinder is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of sewing equipment, in particular to a sewing equipment and a presser foot lifting mechanism. Background Art

[0002] The existing rotary hook pattern machine presser foot lifting mechanism is as follows Figure 1 As shown, it includes parts such as cylinder 07, cylinder shaft 06, cylinder fixing plate 08, cylinder stroke adjustment plate 05, cylinder connecting block 04, pull rod 01, lifting and pressing actuator 02, etc.

[0003] The end of the cylinder shaft of the cylinder 07 is connected to the middle of one end of the cylinder connection block 04, the upper side of the cylinder connection block 04 is connected to the cylinder stroke adjustment plate 05, and the side of the cylinder connection block 04 is connected to the pull rod 01. The cylinder 07 drives the pull rod 01 to move through the extension and contraction of the cylinder shaft, thereby driving the lifting and pressing actuator 02 to lift the presser foot. When the cylinder shaft retracts, the cylinder stroke adjustment plate 05 abuts against the cylinder body to limit the stroke and adjust the height of the presser foot. Figure 1 As shown, the axis of the cylinder shaft and the axis of the tie rod 01 are in parallel and cannot move coaxially. This means that under the action of the tie rod 01, there is a torsional force on the cylinder shaft relative to the cylinder body. After working for a long time, the cylinder shaft and the cylinder body will wear quickly, affecting the life of the cylinder 07. In more serious cases, it will cause the cylinder shaft to break.

[0004] Therefore, how to reduce the wear between the cylinder shaft and the cylinder body of the cylinder is a technical problem that technical personnel in this field currently need to solve. Utility Model Content

[0005] In view of this, the purpose of the utility model is to provide a sewing device and a presser foot lifting mechanism, which can reduce the wear between the cylinder shaft of the cylinder and the cylinder body.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A presser foot lifting mechanism comprises a cylinder, a cylinder connecting block and a pull rod. In the axial direction of the cylinder shaft of the cylinder, the two ends of the cylinder connecting block are respectively a first end and a second end. The cylinder shaft is fixedly connected to the end surface of the first end, and a mounting plate is protruding from the end surface of the second end. In a direction perpendicular to the axial direction, one end of the pull rod is arranged side by side and fixedly connected to the mounting plate, and the axis of the pull rod is colinear with the axis of the cylinder shaft.

[0008] Preferably, it also includes a cylinder stroke adjustment plate, which is fixed to the cylinder connecting block, and the cylinder stroke adjustment plate is adjustable relative to the fixed position of the cylinder connecting block in the axial direction; when the cylinder shaft retracts into the cylinder body, it can retract until the cylinder stroke adjustment plate is against the cylinder body.

[0009] Preferably, the cylinder stroke adjustment plate includes two side plates, and the two side plates are respectively fixed on both sides of the cylinder connecting block in a direction perpendicular to the axial direction; when the cylinder axial direction retracts into the cylinder body, it can retract until the two side plates are against the cylinder body.

[0010] Preferably, the cylinder stroke adjustment plate also includes a connecting plate; in a direction perpendicular to the axial direction, the two ends of the connecting plate are respectively fixed to the two side plates; in the axial direction, the distance between the end surface of the connecting plate close to the cylinder body and the cylinder body is greater than the distance between the end surface of the side plate close to the cylinder body and the cylinder body.

[0011] Preferably, a strip hole is provided on the connecting plate, the strip hole extends along the axial direction, the cylinder connecting block can be fixed to the strip hole by a locking piece, and the fixing position on the strip hole is adjustable.

[0012] Preferably, the pull rod is connected to the mounting plate via a connecting piece, and the end of the pull rod close to the cylinder, the connecting piece and the mounting plate are located in the space between the two side plates, or in the space between the axially extending surfaces of the two side plates.

[0013] Preferably, a cylinder buffer pad is arranged on the cylinder body, and when the cylinder shaft retracts into the cylinder body, it can retract until the cylinder stroke adjustment plate abuts against the cylinder buffer pad.

[0014] Preferably, the cylinder buffer is a buffer washer sleeved on the outer side of the cylinder shaft.

[0015] Preferably, it also includes a cylinder fixing plate and a cylinder rotating shaft; the cylinder fixing plate includes a first plate, a second plate and a third plate, the second plate and the third plate are located on both sides of the first plate in the axial direction, the second plate is fixed to the side of the cylinder body, the first plate is attached to the end face of the cylinder body away from the pull rod in the axial direction, the third plate is rotatably connected to the cylinder rotating shaft, and the third plate is coplanar with the axis of the cylinder shaft, and the axis of the cylinder shaft is coplanar with the axis of the cylinder rotating shaft.

[0016] A sewing device comprises a presser foot lifting mechanism.

[0017] The presser foot lifting mechanism provided by the utility model comprises a cylinder, a cylinder connecting block and a pull rod. In the axial direction of the cylinder shaft of the cylinder, the two ends of the cylinder connecting block are respectively a first end and a second end. The cylinder shaft is fixedly connected to the end face of the first end, and a mounting plate is protruded from the end face of the second end. In a direction perpendicular to the axial direction, one end of the pull rod is arranged side by side and fixedly connected to the mounting plate, and the axis of the pull rod is colinear with the axis of the cylinder shaft.

[0018] The cylinder connecting block is connected to the pull rod through the mounting plate thereon. The axis of the pull rod is colinearly arranged with the axis of the cylinder shaft, which can avoid the formation of a force arm between the pull rod and the cylinder shaft. The pull rod and the cylinder shaft will not form torque relative to the cylinder body, which can reduce the possibility of mutual wear between the cylinder shaft and the cylinder body due to torsion, and is beneficial to extending the service life of the cylinder. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0020] Figure 1 It is a schematic diagram of the design scheme of the presser foot lifting mechanism in the prior art;

[0021] Figure 2 This is a structural schematic diagram of a specific embodiment 1 of the presser foot lifting mechanism provided by the utility model applied to a sewing device;

[0022] Figure 3 This is a structural schematic diagram of a specific embodiment 1 of the presser foot lifting mechanism provided by the utility model;

[0023] Figure 4 for Figure 3 Exploded diagram of

[0024] Figure 5 A top view of a specific embodiment 1 of the presser foot lifting mechanism provided by the utility model;

[0025] Figure 6 It is a partial structural side view of a specific embodiment 1 of the presser foot lifting mechanism provided by the utility model;

[0026] Figure 7 It is a partial structural diagram of a specific embodiment 1 of the presser foot lifting mechanism provided by the utility model.

[0027] Reference numerals:

[0028] Figure 1Middle: tie rod 01, lifting and pressing actuator 02, spring 03, cylinder connecting block 04, cylinder stroke adjustment plate 05, cylinder shaft 06, cylinder 07, cylinder fixing plate 08;

[0029] Figures 2 to 7 middle:

[0030] Tie rod 1;

[0031] Lifting and pressing actuator 2,

[0032] Connector 3;

[0033] Cylinder connecting block 4, mounting plate 41;

[0034] Cylinder stroke adjustment plate 5, side plate 51, connecting plate 52, strip hole 521, locking piece 53;

[0035] Cylinder shaft 6, retaining ring 61;

[0036] Cylinder 7, cylinder shaft 71, cylinder body 72, cylinder cushion 73;

[0037] Cylinder fixing plate 8, first plate 81, second plate 82, third plate 83;

[0038] Axis X. DETAILED DESCRIPTION

[0039] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0040] The core of the utility model is to provide a sewing device and a presser foot lifting mechanism, which can reduce the wear between the cylinder shaft of the cylinder and the cylinder body. The pull rod 1 is connected to the lifting and pressing actuator 2 through a pull rod transmission member.

[0041] For a specific embodiment of the presser foot lifting mechanism provided by the present utility model, please refer to Figures 2 to 7 The presser foot lifting mechanism includes a cylinder 7, a cylinder connecting block 4 and a pull rod 1.

[0042] In the axial direction X of the cylinder shaft 71 of the cylinder 7, the two ends of the cylinder connecting block 4 are respectively the first end ( Figure 5 The right end of the perspective) and the second end ( Figure 5The cylinder shaft 71 is fixedly connected to the end surface of the first end of the cylinder connecting block 4, and can be specifically connected in the middle. The end surface of the second end protrudes and is fixedly provided with a mounting plate 41. In a direction perpendicular to the axial direction X of the cylinder shaft 71, one end of the pull rod 1 is arranged in parallel with the mounting plate 41 and fixedly connected, as shown in FIG. Figure 4 As shown, the second end face of the cylinder connection block 4 forms a single-sided notch design with the mounting plate 41, and one end of the tie rod 1 is filled into the notch. The axis of the tie rod 1 is colinear with the axis of the cylinder shaft 71, and the cylinder shaft 71 can be in a centered force state relative to the tie rod 1, that is, the force is transmitted along the axis, as shown in FIG. Figure 5 and Figure 6 As shown, the force between the pull rod 1 and the cylinder shaft 71 is along the axial direction.

[0043] In this embodiment, the cylinder connecting block 4 is connected to the pull rod 1 through the mounting plate 41 thereon. The axis of the pull rod 1 is colinearly arranged with the axis of the cylinder shaft 71, which can avoid the pull rod 1 from forming a force arm relative to the cylinder shaft 71. The pull rod 1 and the cylinder shaft 71 will not form a torque relative to the cylinder body 72, which can reduce the possibility of mutual wear between the cylinder shaft 71 and the cylinder body 72 due to torsion, which is beneficial to extending the service life of the cylinder 7.

[0044] like Figure 5 As shown, the presser foot lifting mechanism further includes a cylinder stroke adjustment plate 5, which is fixed to the cylinder connecting block 4. When the cylinder shaft 71 retracts into the cylinder body 72, it can be retracted until the cylinder stroke adjustment plate 5 and the cylinder body 72 abut against each other. The fixed position of the cylinder stroke adjustment plate 5 relative to the cylinder connecting block 4 in the axial direction X of the cylinder shaft 71 is adjustable, so that the degree to which the cylinder shaft 71 can be retracted into the cylinder body 72 is adjustable.

[0045] Among them, Figure 7 As shown, the cylinder stroke adjustment plate 5 includes two side plates 51, which are respectively fixed to the two sides of the cylinder connection block 4 in a direction perpendicular to the axial direction X of the cylinder shaft 71. When the cylinder shaft 71 retracts into the cylinder body 72, it can be retracted until the two side plates 51 abut against the cylinder body 72. Specifically, the two side plates 51 can be arranged in parallel and at equal intervals from the axis of the cylinder shaft 71. In addition, the two side plates 51 can be symmetrically arranged on both sides of the cylinder shaft 71, so as to limit the cylinder return symmetrically.

[0046] In this embodiment, the two side plates 51 are simultaneously abutted against the cylinder body 72 on both sides of the cylinder shaft 71 to limit the return stroke of the cylinder shaft 71. Compared with the method in the prior art where a single plate in the cylinder stroke adjustment plate 5 abuts against the cylinder body 72 on one side, it can effectively prevent the cylinder stroke adjustment plate 5 from twisting relative to the cylinder body 72, reduce the torsional force provided by the cylinder stroke adjustment plate 5 to the cylinder shaft 71, and further reduce the possibility of mutual wear between the cylinder shaft 71 and the cylinder body 72 due to torsion.

[0047] In addition, if Figure 5 and Figure 7 As shown, the cylinder stroke adjustment plate 5 also includes a connecting plate 52. In the direction perpendicular to the axial direction X of the cylinder shaft 71, the two ends of the connecting plate 52 are respectively fixed to the two side plates 51. At this time, the cylinder stroke adjustment plate 5 is a U-shaped bent plate structure, which facilitates the unified assembly of the two side plates 51 to the cylinder connection block 4. During assembly, the bent plate structure can be buckled onto the cylinder connection block 4, the connecting plate 52 is located at the top of the cylinder connection block 4, and the two side plates 51 are respectively located on the left and right sides of the cylinder connection block 4, and the two side plates 51 serve as left and right limit areas, respectively.

[0048] Among them, in the axial direction X of the cylinder shaft 71, the distance between the end surface of the connecting plate 52 close to the cylinder body 72 and the cylinder body 72 is greater than the distance between the end surface of the side plate 51 close to the cylinder body 72 and the cylinder body 72. When the cylinder shaft 71 is retracted into place, the two side plates 51 can abut against the cylinder body 72 at the same time to prevent the cylinder stroke adjustment plate 5 from applying a torsional force to the cylinder shaft 71. At the same time, since the distance between the connecting plate 52 and the cylinder body 72 is greater than that between the side plates 51, the connecting plate 52 will not abut against the cylinder body 72, so that the connecting plate 52 can be prevented from affecting the balance of the abutment between the side plates 51 and the cylinder body 72.

[0049] Among them, Figure 5 and Figure 7 As shown, a strip hole 521 is provided on the connecting plate 52, and the strip hole 521 extends along the axial direction X of the cylinder shaft 71. The cylinder connecting block 4 can be fixed to the strip hole 521 by a locking member 53, and the fixing position on the strip hole 521 is adjustable, and the adjustment is convenient. The locking member 53 can be two or more bolts provided along the axial direction X of the cylinder shaft 71. Of course, in other embodiments, the cylinder connecting block 4 can be fixed to the side plate 51 by bolts.

[0050] like Figure 4 and Figure 5 As shown, the pull rod 1 is connected to the mounting plate 41 through the connecting member 3, and the connecting member 3 can be a bolt. The end of the pull rod 1 close to the cylinder 7, the connecting member 3, and the mounting plate 41 are located in the space between the two side plates 51, or in the space between the extension surfaces of the two side plates 51 in the axial direction X of the cylinder shaft 71. That is to say, before the fixed connection, if the two side plates 51 move a certain distance along the axial direction X of the cylinder shaft 71, they will not collide with the pull rod, the fixing member 3 and the mounting plate 41, which can ensure that the cylinder stroke adjustment plate 5 can smoothly adjust the connection position with the cylinder connection block 4 in the axial direction X of the cylinder shaft 71.

[0051] like Figure 4 and Figure 5As shown, a cylinder buffer pad 73 is provided on the cylinder body 72. When the cylinder shaft 71 retracts into the cylinder body 72, it can retract until the cylinder stroke adjustment plate 5 and the cylinder buffer pad 73 abut against each other. By adding the cylinder buffer pad 73, the collision between the cylinder stroke adjustment plate 5 and the cylinder body 72 can be reduced. Among them, the cylinder buffer pad 73 has a buffering and vibration absorbing function, and a soft material such as a rubber pad is selected. In addition, the cylinder buffer pad 73 is a buffer washer sleeved on the outside of the cylinder shaft 71, which is convenient for assembly and installation positioning. In other embodiments, the cylinder buffer pad 7 can also be two strip pads corresponding to the positions of the two side plates 51 respectively.

[0052] like Figures 3 to 5 As shown, the presser foot lifting mechanism also includes a cylinder fixing plate 8 and a cylinder rotating shaft 6. The cylinder fixing plate 8 includes a first plate 81, a second plate 82 and a third plate 83. The second plate 82 and the third plate 83 are located on both sides of the first plate 81 in the axial direction X of the cylinder shaft 71. The second plate 82 is fixed to the side of the cylinder body 72. The first plate 81 is attached to the end face of the cylinder body 72 away from the pull rod 1 in the axial direction X of the cylinder shaft 71. The third plate 83 is rotatably connected to the cylinder rotating shaft 6, and the third plate 83 is coplanar with the axis of the cylinder shaft 71. The axis of the cylinder shaft 71 is coplanar with the axis of the cylinder rotating shaft 6. Specifically, the first plate 81 is perpendicular to the axial direction X of the cylinder shaft 71, and the second plate 82 and the third plate 83 are parallel to the axial direction X of the cylinder shaft 71.

[0053] The cylinder fixing plate 8 rotatably connects the cylinder 7 to the cylinder rotating shaft 6, and when the cylinder 7 drives the lifting and pressing actuator 2 to move, the cylinder fixing plate 8 can rotate relative to the cylinder rotating shaft 6. The cylinder fixing plate 8 adopts a curved bending design, and the corresponding coplanar design between the cylinder fixing plate 8, the cylinder shaft 71 and the cylinder rotating shaft 6 can avoid unnecessary twisting of the cylinder 7 relative to the cylinder rotating shaft 6, and reduce the wear between the cylinder fixing plate 8, the cylinder rotating shaft 6 and the cylinder 7.

[0054] The presser foot lifting mechanism in this embodiment has parts such as a cylinder 7, a cylinder rotating shaft 6, a cylinder fixing plate 8, a cylinder stroke adjustment plate 5, a cylinder connecting block 4, a pull rod 1, and a lifting and pressing actuator 2. During operation, when the cylinder shaft 71 moves forward, the lifting and pressing actuator 2 is pressed downward under the action of the spring; when the cylinder 7 is retracted, the spring is further compressed, and the cylinder stroke adjustment plate 5 supports the cylinder buffer pad 73 to complete the presser foot lifting action. Among them, the pull rod 1 is colinear with the axis of the cylinder shaft 71, the cylinder fixing plate 8 is bent, and the two side plates 51 of the cylinder stroke adjustment plate 5 cooperate with the cylinder body 72, so that the relevant parts are centered, the torsional force is reduced, and the wear between the parts is reduced. The cylinder stroke adjustment plate 5 hits the cylinder buffer pad 73 on the cylinder 7, and does not directly hit the cylinder body 72, which can also reduce the impact damage.

[0055] In addition to the above-mentioned presser foot lifting mechanism, the utility model also provides a sewing device, which includes a presser foot lifting mechanism, which can be specifically a presser foot lifting mechanism provided in any of the above embodiments, and the beneficial effects can be referred to the above embodiments accordingly. The structures of other parts of the sewing device can refer to the prior art, and will not be repeated in this article.

[0056] It should be noted that when an element is referred to as "fixed" to another element, it may be directly on the other element or there may be an element in the middle. When an element is considered to be "connected" to another element, it may be directly connected to the other element or there may be an element in the middle at the same time. In addition, in the description of the present utility model, unless otherwise specified, "multiple", "multiple roots", and "multiple groups" mean two or more.

[0057] The terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features.

[0058] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0059] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0060] The sewing device and presser foot lifting mechanism provided by the utility model are introduced in detail above. This article uses specific examples to illustrate the principle and implementation method of the utility model. The description of the above embodiments is only used to help understand the method and core idea of ​​the utility model. It should be pointed out that for ordinary technicians in this technical field, without departing from the principle of the utility model, the utility model can also be improved and modified, and these improvements and modifications also fall within the scope of protection of the claims of the utility model.

Claims

1. A presser foot lifting mechanism, characterized in that: It comprises a cylinder (7), a cylinder connecting block (4) and a pull rod (1); in the axial direction (X) of the cylinder shaft (71) of the cylinder (7), the two ends of the cylinder connecting block (4) are respectively a first end and a second end; the cylinder shaft (71) is fixedly connected to the end surface of the first end; the end surface of the second end is protruding to provide a mounting plate (41); in a direction perpendicular to the axial direction (X), one end of the pull rod (1) is arranged in parallel with and fixedly connected to the mounting plate (41); and the axis of the pull rod (1) is collinear with the axis of the cylinder shaft (71).

2. The presser foot lifting mechanism according to claim 1, characterized in that: It also comprises a cylinder stroke adjustment plate (5), the cylinder stroke adjustment plate (5) being fixed to the cylinder connection block (4), and the fixed position of the cylinder stroke adjustment plate (5) relative to the cylinder connection block (4) in the axial direction (X) being adjustable; when the cylinder shaft (71) retracts into the cylinder body (72), it can retract until the cylinder stroke adjustment plate (5) abuts against the cylinder body (72).

3. The presser foot lifting mechanism according to claim 2, characterized in that: The cylinder stroke adjustment plate (5) comprises two side plates (51), and in a direction perpendicular to the axial direction (X), the two side plates (51) are respectively fixed to two sides of the cylinder connection block (4); when the cylinder shaft (71) retracts into the cylinder body (72), it can retract until the two side plates (51) abut against the cylinder body (72).

4. The presser foot lifting mechanism according to claim 3, characterized in that: The cylinder stroke adjustment plate (5) further comprises a connecting plate (52); in a direction perpendicular to the axial direction (X), two ends of the connecting plate (52) are respectively fixed to the two side plates (51); in the axial direction (X), the distance between the end surface of the connecting plate (52) close to the cylinder body (72) and the cylinder body (72) is greater than the distance between the end surface of the side plate (51) close to the cylinder body (72) and the cylinder body (72).

5. The presser foot lifting mechanism according to claim 4, characterized in that: The connecting plate (52) is provided with a strip-shaped hole (521), the strip-shaped hole (521) extending along the axial direction (X), the cylinder connecting block (4) can be fixed to the strip-shaped hole (521) by means of a locking piece (53), and the fixing position on the strip-shaped hole (521) is adjustable.

6. The presser foot lifting mechanism according to claim 3, characterized in that: The pull rod (1) is connected to the mounting plate (41) via a connecting piece (3), and one end of the pull rod (1) close to the cylinder (7), the connecting piece (3), and the mounting plate (41) are located in the space between the two side plates (51), or in the space between the extended surfaces of the two side plates (51) in the axial direction (X).

7. The presser foot lifting mechanism according to claim 2, characterized in that: A cylinder buffer pad (73) is provided on the cylinder body (72), and when the cylinder shaft (71) retracts into the cylinder body (72), it can retract until the cylinder stroke adjustment plate (5) abuts against the cylinder buffer pad (73).

8. The presser foot lifting mechanism according to claim 7, characterized in that: The cylinder buffer pad (73) is a buffer washer sleeved on the outside of the cylinder shaft (71).

9. The presser foot lifting mechanism according to any one of claims 1 to 8, characterized in that: It also includes a cylinder fixing plate (8) and a cylinder rotating shaft (6); the cylinder fixing plate (8) includes a first plate (81), a second plate (82) and a third plate (83); the second plate (82) and the third plate (83) are located on both sides of the first plate (81) in the axial direction (X); the second plate (82) is fixed to the side surface of the cylinder body (72); the first plate (81) is attached to the end surface of the cylinder body (72) in the axial direction (X) away from the pull rod (1); the third plate (83) is rotatably connected to the cylinder rotating shaft (6); the third plate (83) is coplanar with the axis of the cylinder shaft (71); and the axis of the cylinder shaft (71) is coplanar with the axis of the cylinder rotating shaft (6).

10. A sewing device, characterized in that: A presser foot lifting mechanism comprising any one of claims 1 to 9.

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