Close sewing device of sewing machine

Abstract

The utility model belongs to the technical field of sewing machines, and particularly relates to a close sewing device of a sewing machine. A stitch length adjusting shaft capable of driving the stitch length adjusting mechanism to act is rotationally arranged on the base, the stitch length adjusting shaft extends out of the base and is connected with one end of an adjusting rod, a stitch length scale plate is arranged on the outer side of the adjusting rod, an adjusting hole is formed in the stitch length scale plate, and a connecting piece is arranged at the other end of the adjusting rod; the adjusting shifting fork is rotationally arranged on the base and is driven by the driving part to rotate, one end of the adjusting shifting fork is connected with the connecting part, the driving part drives the adjusting shifting fork to rotate so as to drive the adjusting rod to rotate to adjust the stitch length and switch between the stitch length required by close stitching and working, and the action of the driving part is controlled by the controller; the stitch length adjusting shaft is driven by the driving piece, the adjusting shifting fork and the adjusting rod to rotate to achieve switching between close sewing and stitch length needed by work, close sewing can be achieved when sewing is started and sewing is finished, and sewing quality is improved.

Description

Technical field:

[0001] The utility model belongs to the technical field of sewing machines, in particular to a sewing machine device. Background technology:

[0002] The interlock sewing machine will first adjust the required stitch length at the beginning of sewing. Therefore, the stitch length cannot be adjusted at the beginning and end of sewing, causing the bottom thread end of one stitch length to not form a self-locking shape and will fall off with a slight pull, affecting the sewing effect. Summary of the invention:

[0003] The utility model aims to provide a sewing device which can perform close sewing at the beginning and the end of sewing.

[0004] The utility model is achieved in this way:

[0005] A close-sewing device comprises a stitch length adjustment mechanism and a base, wherein a stitch length adjustment shaft capable of driving the stitch length adjustment mechanism is rotatably provided on the base, the stitch length adjustment shaft extends out of the base and is connected to one end of an adjusting rod, a stitch length scale plate is provided on the outside of the adjusting rod, the stitch length scale plate is mounted on the base, an adjustment hole is provided on the stitch length scale plate, a connecting piece is provided at the other end of the adjusting rod, one end of the connecting piece is located outside the stitch length scale plate, and the other end passes through the adjustment hole and is connected to the adjusting rod, an adjusting fork is rotatably provided on the base and driven to rotate by a driving member, and one end of the adjusting fork is connected to the connecting piece, the driving member drives the adjusting fork to rotate and then drives the adjusting rod to rotate to adjust the stitch length, and switch between close-sewing and the stitch length required for work, and the action of the driving member is controlled by a controller.

[0006] In the above-mentioned sewing device for precise stitching, the base is provided with an adjusting fork pad via a fastener, and the adjusting fork is rotatably provided on the adjusting fork pad.

[0007] In the above-mentioned precise sewing device, the driving member is a linear driving member, which includes a telescopic portion, and an outer end of the telescopic portion is rotatably connected to the other end of the adjusting fork.

[0008] In the above-mentioned precise sewing device, the linear driving member is a cylinder or an electromagnet.

[0009] In the above-mentioned precise sewing device, the driving member is a rotary driving member, which includes a rotating portion connected to the other end of the adjusting fork and drives the adjusting fork to rotate accordingly.

[0010] In the above-mentioned precise sewing device, the rotary driving member is a motor or a rotary cylinder.

[0011] In the above-mentioned tight sewing device, limit members for limiting the rotation angle of the adjusting rod are adjustably provided on the adjusting hole and on both sides of the connecting member. In the initial state, the stitch length is in a tight sewing state. When the driving member drives the adjusting fork to abut against the corresponding limit member, the stitch length is adjusted to the required size.

[0012] In the above-mentioned precise sewing device, the limiting member includes a gasket, a screw and a nut, and the screw passes through the gasket and the adjustment hole and is connected to the nut.

[0013] In the above-mentioned sewing secret stitching device, a display hole is provided on the adjustment scale plate below the adjustment hole, a stitch length scale is provided on the stitch length scale plate between the adjustment hole and the display hole, and a current stitch length indicator mark is provided on the adjustment rod, and the indicator mark is displayed through the display hole.

[0014] In the above-mentioned precise sewing device, the driving member is fixed on the base via a driving member base.

[0015] The outstanding advantages of the utility model compared with the prior art are:

[0016] 1. The utility model drives the needle distance adjustment shaft to rotate through the driving member, the adjustment fork and the adjustment rod to realize the switching between close stitching and the stitch distance required for the work, which can realize close stitching at the beginning and end of sewing, thereby improving the sewing quality;

[0017] 2. The limiter provided in the present invention limits the rotation angle of the adjustment fork, thereby limiting the stitch length, solving the defect that driving parts such as cylinders and electromagnets cannot control the telescopic stroke or rotation stroke, and improving the accuracy of stitch length adjustment. Description of the drawings:

[0018] Figure 1 It is a three-dimensional schematic diagram of the utility model;

[0019] Figure 2 This is a front perspective schematic diagram of the sealing device of the utility model;

[0020] Figure 3 It is a three-dimensional schematic diagram of the back side of the sealing device of the present invention.

[0021] In the figure: 1. Base; 2. Stitch adjustment shaft; 3. Adjusting rod; 4. Stitch scale plate; 5. Adjusting hole; 6. Connecting part; 7. Limiting part; 8. Adjusting fork; 9. Driving part; 10. Telescopic part; 11. Connector; 12. Fork pad; 13. Cylinder base; 14. Display hole; 15. Stitch scale; 16. Indicator mark. Specific implementation method:

[0022] The present invention is further described below with reference to specific embodiments. Figure 1 —3:

[0023] The utility model provides a sewing device for making secret stitches, which includes a stitch length adjustment mechanism and a base 1. A stitch length adjustment shaft 2 capable of driving the stitch length adjustment mechanism is rotatably provided on the base 1. The stitch length adjustment shaft 2 extends out of the base 1 and is connected to one end of an adjusting rod 3. Specifically, a slot is provided on the end surface of the end of the stitch length adjustment shaft 2 extending out of the base 1, and one end of the adjusting rod 3 is fixed to the end surface of the stitch length adjustment shaft 2 by a screw. The rotation of the adjusting rod 3 can drive the stitch length adjustment shaft 2 to rotate, thereby driving the stitch length adjustment mechanism to adjust the stitch length. A stitch length scale plate 4 is provided on the outside of the adjusting rod 3, and the stitch length scale plate 4 is mounted on the base 1. An adjustment hole 5 is provided on the stitch length scale plate 4. A connecting piece 6 is provided on the other end of the adjusting rod 3. One end of the connecting piece 6 is located outside the stitch length scale plate 4, and the other end passes through the adjustment hole 5 and is connected to the adjusting rod 3. An adjusting fork 8 is rotatably provided on the base 1, and one end of the adjusting fork 8 is connected to the connecting piece 6. The driving piece 9 drives the adjusting fork 8 to rotate and then drives the adjusting rod 3 to rotate to adjust the stitch length and switch between the close stitch and the stitch length required for work. The action of the driving piece 9 is controlled by the controller.

[0024] It should be noted that the connector 6 of the present invention comprises a screw and a bushing mounted thereon. The bushing is rotatably connected to the screw, and the lower end of the screw is threadedly connected to the adjustment rod 3. The adjustment fork 8 is provided with an opening, and the connector 6 is positioned within the opening. The bushing reduces friction between the connector 6 and the adjustment fork 8.

[0025] As one embodiment, the driving member 9 in this embodiment is a linear actuator, such as a cylinder or electromagnet, preferably a cylinder. The telescopic portion 10 is the piston rod of the cylinder. Accordingly, the middle portion of the adjustment fork 8 is pivotally mounted on the base 1, and the other end of the adjustment fork 8 is connected to the piston rod via a joint 11. Stoppers 7 are provided on the adjustment hole 5 and on either side of the connecting member 6 to limit the rotation angle of the adjustment rod 3.

[0026] In the initial state, the cylinder's piston rod is fully extended, and the stitch length is in a close-fitting state. The position of the stopper 7 on the adjustment hole 5 is adjusted according to actual needs. At the start of sewing, the sewing machine can achieve close-fitting stitches. During normal sewing, the piston rod retracts, rotating the adjustment fork 8, which in turn rotates the adjustment rod 3. The adjustment fork 8 abuts against the stopper 7 on one side, adjusting the stitch length to the desired value and allowing the sewing machine to begin sewing. At the end of sewing, the controller controls the cylinder's piston rod to extend outward again to its limit, returning the stitch length to a close-fitting state and allowing close-fitting stitching to proceed.

[0027] It should be noted that the limiting member 7 can be moved in the adjusting hole 5 , specifically by manually adjusting the position according to the required stitch length.

[0028] As another embodiment, the driving member of this embodiment is a rotary driving member, such as a motor, a rotary cylinder, etc., preferably a motor. The rotary driving member includes a rotating portion, in which case the rotating portion is the motor shaft of the motor. In the initial state, the stitch length is in a close stitch state. At the beginning of sewing, the sewing machine can achieve a close stitch. During normal sewing, the motor shaft rotates, driving the adjustment fork 8 to rotate, which in turn drives the adjustment rod 3 to rotate. The adjustment fork 8 abuts against a limiter on one side. At this point, the stitch length is adjusted to the desired size, and the sewing machine begins sewing. At the end of sewing, the motor shaft rotates to the close stitch position, achieving a close stitch at the end.

[0029] It should be noted that the action of the driving member 9 of the present invention can be coordinated with a sensor or controlled by a program of a controller.

[0030] Due to positional relationships, the base 1 is provided with an adjusting fork pad 12 via fasteners, and the adjusting fork 8 is rotatably provided on the adjusting fork pad 12 .

[0031] In order to facilitate the installation of the driving member 9 , the driving member 9 is fixed on the base 1 through the driving member base 13 .

[0032] Specifically, the position-limiting member 7 includes a washer, a screw, and a nut, and the screw passes through the washer and the adjustment hole 5 and is connected to the nut. When adjusting the position of the position-limiting member 7, the nut is loosened and moved to the corresponding position. After the adjustment is completed, the nut is tightened.

[0033] In order to be able to intuitively display the current stitch length, a display hole 14 is provided on the adjustment scale plate 4 below the adjustment hole 5, a stitch length scale 15 is provided on the stitch length scale plate 4 between the adjustment hole 5 and the display hole 14, and a current stitch length indicator 16 is provided on the adjustment rod 3. The indicator 16 is displayed through the display hole 14. When the indicator 16 faces the corresponding stitch length scale 15, the value is the current stitch length.

[0034] The base 1 of the present invention is provided with a mounting post, and the needle distance scale plate 4 is screwed onto the mounting post and connected to the base 1. The adjustment hole 5 and the display hole 14 are both arc-shaped holes, and the centers of the two arc-shaped holes are concentric with the rotation center of the adjustment rod 3.

[0035] The above embodiment is only one of the preferred embodiments of the present invention and is not intended to limit the scope of implementation of the present invention. Therefore, any equivalent changes made based on the shape, structure, and principle of the present invention should be included in the scope of protection of the present invention.

Claims

1. A sewing device for precise stitching, comprising a needle distance adjustment mechanism and a base (1), wherein a needle distance adjustment shaft (2) capable of driving the needle distance adjustment mechanism is rotatably provided on the base (1), characterized in that: The needle distance adjustment shaft (2) extends out of the base (1) and is connected to one end of the adjustment rod (3). A needle distance scale plate (4) is provided on the outside of the adjustment rod (3). The needle distance scale plate (4) is mounted on the base (1). An adjustment hole (5) is provided on the needle distance scale plate (4). A connecting member (6) is provided at the other end of the adjustment rod (3). One end of the connecting member (6) is located outside the needle distance scale plate (4), and the other end passes through the adjustment hole (5) and is connected to the adjustment rod (3). An adjustment fork (8) is rotatably arranged on the base (1) and driven to rotate by a driving member (9). One end of the adjustment fork (8) is connected to the connecting member (6). The driving member (9) drives the adjustment fork (8) to rotate and then drives the adjustment rod (3) to rotate to adjust the needle distance and switch between the close stitching and the needle distance required for work. The action of the driving member (9) is controlled by a controller.

2. A sewing device for precise stitching according to claim 1, characterized in that: The base (1) is provided with an adjusting fork pad (12) via a fastener, and the adjusting fork (8) is rotatably provided on the adjusting fork pad (12).

3. The sewing device according to claim 1, characterized in that: The driving member (9) is a linear driving member, which includes a telescopic portion (10), and the outer end of the telescopic portion (10) is rotatably connected to the other end of the adjustment fork (8).

4. The sewing device according to claim 3, characterized in that: The linear driving component is a cylinder or an electromagnet.

5. The sewing device according to claim 1, characterized in that: The driving member (9) is a rotary driving member, which includes a rotating portion connected to the other end of the adjusting fork (8) and drives the adjusting fork (8) to rotate accordingly.

6. The sewing device according to claim 5, characterized in that: The rotary driving member is a motor or a rotary cylinder.

7. A sewing device for precise stitching according to claim 3 or 5, characterized in that: Limiting members (7) for limiting the rotation angle of the adjusting rod (3) are adjustably provided on the adjusting hole (5) and on both sides of the connecting member (6). In the initial state, the stitch length is in a close stitching state. When the driving member (9) drives the adjusting fork (8) to abut against the corresponding limiting member (7), the stitch length is adjusted to a desired size.

8. The sewing device according to claim 7, characterized in that: The limiting member (7) comprises a washer, a screw and a nut, and the screw passes through the washer and the adjustment hole (5) and is connected to the nut.

9. The sewing device according to claim 1 or 2, characterized in that: A display hole (14) is provided on the stitch length scale plate (4) below the adjusting hole (5), a stitch length scale (15) is provided on the stitch length scale plate (4) between the adjusting hole (5) and the display hole (14), and a current stitch length indication mark (16) is provided on the adjusting rod (3), and the indication mark (16) is displayed through the display hole (14).

10. The sewing device for precise stitching according to any one of claims 1 to 6, characterized in that: The driving member (9) is fixed on the base (1) via a driving member base (13).

Images