Presser foot structure of multi-needle machine

Abstract

The utility model provides a presser foot structure of a multi-needle machine, and belongs to the technical field of sewing machines. The problem of how to improve the sewing quality of the multi-needle machine is solved. The presser foot structure of the multi-needle machine comprises a connecting base, a presser foot plate with a plurality of needle holes and a presser foot support fixedly connected with the connecting base, the presser foot plate is located below the presser foot support, the two side edges of the presser foot plate are hinged to the presser foot support, and a torsional spring is arranged between the presser foot plate and the presser foot support. The bottom face of the presser foot plate inclines relative to the horizontal plane in the front-back direction and is high in front and low in back, and the presser foot plate can swing relative to the presser foot support and reset through elastic force of the torsion spring. The presser foot is simple, reasonable and stable in structure, the presser foot plate has mechanical elasticity, stable and reliable pressing force can be provided for cloth with different thicknesses, the cloth is not prone to loosening, the pressing effect is good, and the sewing quality of the multi-needle machine is greatly improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of sewing machines and relates to a presser foot structure of a multi-needle sewing machine. Background Art

[0002] A sewing machine is a machine that uses one or more sewing threads to form one or more stitches on the sewing material to interweave or sew one or more layers of sewing material. With the development of sewing technology and the improvement of sewing machine manufacturing level, there are more and more types of sewing machines.

[0003] Among them, the multi-needle sewing machine is a sewing machine that can sew several lines of stitches at the same time. It has multiple needles. The multi-needle sewing machine is widely used in decorative sewing. According to the number of needles, the multi-needle sewing machine has 3 needles, 4 needles, 6 needles, 9 needles, 12 needles, 16 needles, 21 needles, 24 needles, 25 needles, 33 needles, 38 needles, and 50 needles. The multi-needle sewing machine can realize pleating, tucking, elastic wrinkling and other functions with auxiliary devices.

[0004] At present, since multi-needle machines have more needles and the width of the processing area is relatively large, the presser foot of the multi-needle machine is designed to be wider than the presser foot of an ordinary sewing machine. For example, the presser foot structure in the multi-needle lockstitch sewing machine disclosed in Chinese patent CN103510277B is prone to uneven pressure when applying pressing force to the cloth due to the large width required for pressure application, which may cause the cloth to loosen or not be pressed firmly. Moreover, the presser foot cannot adapt to and adjust the pressing force for cloth of different thicknesses. Therefore, the presser foot of the existing multi-needle machine is prone to unreliable and unstable pressing during the pressing process, thereby affecting the sewing quality of the multi-needle machine. Utility Model Content

[0005] The purpose of the utility model is to solve the above problems in the prior art and to propose a presser foot structure for a multi-needle machine. The technical problem to be solved by the utility model is how to improve the sewing quality of the multi-needle machine.

[0006] The purpose of the utility model can be achieved through the following technical solutions: a presser foot structure of a multi-needle machine, comprising a connecting seat and a presser foot plate with multiple needle holes, characterized in that the presser foot structure also includes a presser foot bracket fixedly connected to the connecting seat, the presser foot plate is located below the presser foot bracket and both side edges of the presser foot plate are hingedly connected to the presser foot bracket, a torsion spring is provided between the presser foot plate and the presser foot bracket, the bottom surface of the presser foot plate is inclined relative to the horizontal plane in the front and rear directions and is higher in the front and lower in the back, and the presser foot plate can swing relative to the presser foot bracket and be reset by the elastic force of the torsion spring.

[0007] The presser foot structure of the multi-needle machine changes the original existing connection structure in which the presser foot is directly fixedly connected to the connecting seat, so that the presser foot can swing relatively and has mechanical elasticity, thereby achieving the purpose of improving the reliability of pressing materials. Specifically, the presser foot structure of the multi-needle machine is provided with a presser foot bracket, which is fixedly connected to the connecting seat on the one hand, and hingedly connected to the presser foot on the other hand, so that the presser foot can swing relative to the presser foot bracket. At the same time, by arranging a torsion spring between the presser foot and the presser foot bracket, the presser foot is reset by the elastic force of the torsion spring. Conversely, when the presser foot needs to swing, it also needs to overcome the elastic force of the torsion spring in order to swing. In other words, through this design, the presser foot can swing and has mechanical elasticity, and because the bottom surface of the presser foot is inclined relative to the horizontal plane in the front-to-back direction in the initial state of the presser foot and is higher in the front and lower in the back, this design allows the presser foot to press down the fabric. At this time, the rear end of the presser foot will be subjected to force and swing first. At this time, the presser foot can use the elastic force of the torsion spring to apply a pre-tightening force to the cloth, so that the presser foot can provide an appropriate elastic pre-tightening force according to the thickness of the cloth when pressing the cloth. In this way, the presser foot structure can better press the cloth, making it less likely for the cloth to loosen and press it more firmly. At the same time, since the presser foot of the multi-needle machine is wider, the two sides of the presser foot are hinged to the presser foot bracket, so that the connection of the presser foot is more stable, which is further conducive to the presser foot providing a stable pressing force. Therefore, through the presser foot structure designed as above, the cloth can be better pressed, thereby effectively improving the sewing quality of the multi-needle machine.

[0008] In the presser foot structure of the multi-needle machine, the presser foot bracket includes a strip-shaped body and vertical ears located at both ends of the body and extending vertically, and the two sides of the presser foot plate are respectively provided with hinge seats corresponding to the vertical ears, and the hinge seats are hingedly connected to the corresponding vertical ears. Through the above design of the presser foot bracket and the presser foot plate structure, the connection structure of the presser foot plate is more stable, which is conducive to the output of a stable and reliable pressing force by the presser foot, providing better pressing for the fabric, and thus improving the sewing quality of the multi-needle machine.

[0009] In the presser foot structure of the multi-needle machine, both sides of the presser foot plate are hinged to the presser foot bracket through a hinge pin, the hinge pin passes through the vertical ear and the hinge seat on the corresponding side in sequence, and the torsion spring is sleeved on the hinge pin and located between the vertical ear and the hinge seat. Through the above design, the torsion spring is installed and protected between the vertical ear and the hinge seat, so that the torsion spring is not easily disturbed and elastically fails, which is conducive to improving the reliability of the use of the presser foot, so that the presser foot can reliably and stably press the fabric, and improve the sewing quality of the multi-needle machine.

[0010] In the presser foot structure of the multi-needle machine, the two ends of the torsion spring are respectively pressed against the upper surface of the presser foot. Through the installation arrangement of the torsion spring, the torsion spring can apply elastic preload to the presser foot to prevent the presser foot from swinging up and down relative to the presser foot bracket, so that the presser foot has mechanical elasticity, thereby achieving the purpose of improving sewing quality.

[0011] As another solution, in the presser foot structure of the multi-needle machine, one end of the torsion spring is pressed against the upper surface of the presser foot plate, and the other end is clamped on the side of the presser foot plate. Through the installation arrangement of the torsion spring, the torsion spring can apply elastic pre-tightening force to the presser foot plate to prevent the presser foot plate from swinging up and down relative to the presser foot bracket, so that the presser foot plate has mechanical elasticity, thereby achieving the purpose of improving sewing quality.

[0012] As another solution, in the presser foot structure of the multi-needle machine, the two ends of the torsion spring are respectively clamped on the side of the presser foot plate. Through the installation arrangement of the torsion spring, the torsion spring can apply elastic pre-tightening force to the presser foot plate to prevent the presser foot plate from swinging up and down relative to the presser foot bracket, so that the presser foot plate has mechanical elasticity, thereby achieving the purpose of improving sewing quality.

[0013] In the presser foot structure of the multi-needle machine, the connecting seat is provided with a waist-shaped connecting hole, a screw is arranged in the connecting hole, and the presser foot bracket is fixedly connected to the connecting seat by the screw. The waist-shaped connecting hole design facilitates the installation and adjustment of the presser foot bracket.

[0014] Compared with the prior art, the presser foot structure of the multi-needle machine has the following advantages: the presser foot structure is simple, reasonable and stable, the presser foot plate has mechanical elasticity, can provide stable and reliable pressing force for fabrics of different thicknesses, the fabric is not easy to loosen, the pressing effect is good, and the sewing quality of the multi-needle machine is greatly improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the presser foot structure in the first embodiment. Figure 1 .

[0016] Figure 2 This is a schematic diagram of the presser foot structure in the first embodiment. Figure 2 .

[0017] Figure 3 It is a schematic diagram of the presser foot structure in the initial state in the first embodiment.

[0018] In the figure, 1, connecting seat; 11, connecting hole; 2, presser foot plate; 2a, pinhole; 21, hinge seat; 3, presser foot bracket; 31, main body; 32, vertical ear; 4, torsion spring; 5, hinge pin. DETAILED DESCRIPTION

[0019] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0020] Embodiment 1:

[0021] Specifically, if Figure 1 As shown, the presser foot structure of the multi-needle machine includes a connecting seat 1, a presser foot plate 2 with multiple needle holes 2a, and a presser foot bracket 3. The connecting seat 1 is provided with a waist-shaped connecting hole 11, and a screw (not shown in the figure) is arranged in the connecting hole 11. The presser foot bracket 3 is fixedly connected to the connecting seat 1 through the screw. The presser foot plate 2 is located below the presser foot bracket 3, and both sides of the presser foot plate 2 are hingedly connected to the presser foot bracket 3 through a hinge pin 5. A torsion spring 4 is arranged between the presser foot plate 2 and the presser foot bracket 3. Figure 3 As shown, the bottom surface of the presser foot plate 2 is slightly inclined relative to the horizontal plane in the front-to-back direction and is higher in the front and lower in the back. The presser foot plate 2 can swing relative to the presser foot bracket 3 and be reset by the elastic force of the torsion spring 4.

[0022] More specifically, if Figure 2 As shown, the presser foot bracket 3 includes a strip-shaped body 31 and vertical ears 32 located at both ends of the body 31 and extending vertically, the presser foot plate 2 is located between the vertical ears 32, and the two sides of the presser foot plate 2 are respectively provided with hinge seats 21 corresponding to the vertical ears 32, and the hinge seats 21 are hingedly connected with the corresponding vertical ears 32. The presser foot plate 2 and the presser foot bracket 3 are hingedly connected through a hinge pin 5, and the hinge pin 5 passes through the vertical ears 32 and the corresponding hinge seat 21 in sequence. The torsion spring 4 is sleeved on the hinge pin 5 and is located between the vertical ears 32 and the hinge seat 21. The two ends of the torsion spring 4 are respectively pressed against the upper surface of the presser foot plate 2.

[0023] Embodiment 2:

[0024] The technical solution in this embodiment is basically the same as the technical solution in embodiment 1, except that, in this embodiment, one end of the torsion spring 4 is pressed against the upper surface of the presser foot plate 2, and the other end is clamped on the side of the presser foot plate 2.

[0025] Embodiment three:

[0026] The technical solution in this embodiment is basically the same as the technical solution in the first embodiment, except that, in this embodiment, both ends of the torsion spring 4 are respectively clamped on the side edges of the presser foot plate 2 .

[0027] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

[0028] Although the present invention uses the terms such as the connection seat 1, the connection hole 11, the presser foot plate 2, the needle hole 2a, the hinge seat 21, the presser foot bracket 3, the body 31, the vertical ear 32, the torsion spring 4, the hinge pin 5, etc. more frequently, the possibility of using other terms is not excluded. The use of these terms is only for the purpose of more conveniently describing and explaining the essence of the present invention; interpreting them as any additional limitation is contrary to the spirit of the present invention.

Claims

1. A presser foot structure for a multi-needle machine, comprising a connecting seat (1) and a presser foot plate (2) having a plurality of needle holes (2a), characterized in that: The presser foot structure also includes a presser foot bracket (3) fixedly connected to the connecting seat (1); the presser foot plate (2) is located below the presser foot bracket (3) and both side edges of the presser foot plate (2) are hingedly connected to the presser foot bracket (3); a torsion spring (4) is provided between the presser foot plate (2) and the presser foot bracket (3); the bottom surface of the presser foot plate (2) is inclined relative to a horizontal plane in a front-to-back direction and is higher in the front and lower in the back; the presser foot plate (2) can swing relative to the presser foot bracket (3) and be reset by the elastic force of the torsion spring (4).

2. The presser foot structure of the multi-needle machine according to claim 1, characterized in that: The presser foot bracket (3) comprises a strip-shaped body (31) and vertical ears (32) located at both ends of the body (31) and extending vertically, and the two side edges of the presser foot plate (2) are respectively provided with hinge seats (21) corresponding to the vertical ears (32), and the hinge seats (21) are hingedly connected to the corresponding vertical ears (32).

3. The presser foot structure of the multi-needle machine according to claim 2, characterized in that: Both sides of the presser foot plate (2) are hinged to the presser foot bracket (3) through a hinge pin (5), and the hinge pin (5) passes through the vertical ear (32) and the hinge seat (21) on the corresponding side in sequence, and the torsion spring (4) is sleeved on the hinge pin (5) and located between the vertical ear (32) and the hinge seat (21).

4. The presser foot structure of the multi-needle machine according to claim 3, characterized in that: The two ends of the torsion spring (4) are respectively pressed against the upper surface of the presser foot plate (2).

5. The presser foot structure of the multi-needle machine according to claim 3, characterized in that: One end of the torsion spring (4) is pressed against the upper surface of the presser foot plate (2), and the other end is clamped on the side edge of the presser foot plate (2).

6. The presser foot structure of the multi-needle machine according to claim 3, characterized in that: The two ends of the torsion spring (4) are respectively clamped on the side edges of the pressure foot plate (2).

7. The presser foot structure of a multi-needle machine according to any one of claims 1 to 6, characterized in that: The connecting seat (1) is provided with a waist-shaped connecting hole (11), a screw is arranged in the connecting hole (11), and the presser foot bracket (3) is fixedly connected to the connecting seat (1) via the screw.

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