Presser foot device of sewing machine

Abstract

The utility model discloses a sewing machine presser foot device which comprises a column body, a pressing rod and a presser foot plate, the pressing rod is connected in the column body in a sleeved mode, one end of the pressing rod is located in the column body and connected with a positioning block in a sliding mode, and an air cushion is connected in the column body and located at the top of the positioning block in a gluing mode. And reset springs are arranged on the two sides of the pressing rod in the column body. The presser foot device of the sewing machine is simple and compact in overall structure, low in cost, easy to operate, more flexible and convenient to debug and suitable for being widely popularized and used.

Description

TECHNICAL FIELD

[0001] The utility model relates to sewing machine technical field, especially a sewing machine presser foot device. BACKGROUND

[0002] The sewing machine presser foot device is an indispensable component in the feeding mechanism of the sewing machine and plays a very important role in the production process. During the sewing process of the sewing machine, the presser foot is lowered, the pressure generated by the presser foot acts on the sewing material, and the sewing material is flattened, so that the sewing thread is tightened and beautiful. When the material needs to be taken out, placed or turned, the presser foot needs to be lifted.

[0003] Publication No. CN202936601U discloses a sewing machine presser foot device, which comprises a bottom plate and a vertical rod. One end of the bottom plate is hinged to the vertical rod and partially extends out of the vertical rod. The extended part is provided with a protrusion which is perpendicular to the bottom plate and abuts against one side of the vertical rod. The sewing machine presser foot device further comprises an anti-rotation mechanism for preventing the bottom plate from rotating around the hinge point. The bottom plate can rotate around the hinge point. When the bottom plate needs to be lifted, it only needs to be rotated. The bottom plate is provided with a protrusion. When the bottom plate is rotated to the vertical position, it is prevented from continuing to rotate, thereby being limited in position.

[0004] At present, the existing presser foot device has the following disadvantages when in use: lack of auxiliary pressure adjusting mechanism, the presser foot device is usually of fixed structure, and the pressure of the presser foot needs to be adjusted by the sewing machine. However, due to factors such as height difference and inconvenient operation, the adjustment of the pressure of the presser foot needs to be repeatedly tested, and the flexibility and convenience of use are general. Therefore, we propose a sewing machine presser foot device. SUMMARY

[0005] The main purpose of the utility model is to provide a sewing machine presser foot device, which can effectively solve the problems in the background art.

[0006] To achieve the above-mentioned purpose, the technical scheme adopted by the utility model is as follows:

[0007] A sewing machine presser foot device, which comprises a column, a press rod and a presser foot plate. The press rod is connected to the column in a sleeved manner. One end of the press rod is slidingly connected to a positioning block in the column. A gas cushion is connected to the top of the positioning block in the column by gluing. Reset springs are arranged on both sides of the press rod in the column.

[0008] Further, one side of the column is provided with an air inlet seat, the air outlet end of the air inlet seat is communicated with the gas cushion, and the surface of the air inlet seat is provided with an elastomer. The air inlet seat is connected to the elastomer by gluing.

[0009] Further, one side of the column is threadedly connected to a fastening screw rod corresponding to the press rod through a reserved threaded hole. The surface of the press rod is provided with a scale line. The bottom of the press rod is connected to the presser foot plate by bolts.

[0010] Furthermore, the air intake end of the air intake seat is provided with a one-way valve, the surface of the air intake seat is provided with a valve core on one side of the elastomer, and a protective cover is provided on one side of the air intake seat on the periphery of the elastomer. The air intake seat is connected to the protective cover by a thread.

[0011] Furthermore, a presser foot handle is fixedly provided on one side of the column, and the column is connected to the presser foot handle by bolts.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] By incorporating a column, pressure bar, positioning block, air cushion, and return spring, the presser foot's position can be quickly adjusted using the deformation generated by inflation, thereby controlling the presser foot pressure. The structure is simple and compact, inexpensive, and more flexible and reliable in use, greatly improving the convenience of pre-setting operations before sewing machine operation.

[0014] With its air intake seat, air cushion, and elastomer, the air cushion can be quickly inflated by the elastic deformation generated by pressing. It is simple and labor-saving to operate, more convenient and reliable to use, and has high practical value. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of a sewing machine presser foot device according to the present invention.

[0016] Figure 2 This is a schematic diagram of the column cross-sectional structure of a sewing machine presser foot device according to the present invention.

[0017] Figure 3 This is a schematic diagram of the air inlet seat structure of a sewing machine presser foot device according to the present invention.

[0018] In the diagram: 1. Column; 2. Pressure rod; 3. Positioning block; 4. Air cushion; 5. Return spring; 6. Fastening screw; 7. Inlet seat; 8. Elastomer; 9. One-way valve; 10. Valve core; 11. Protective cover; 12. Scale line; 13. Pressure foot plate; 14. Pressure foot handle. Detailed Implementation

[0019] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0020] like Figure 1 , 2As shown, a sewing machine presser foot device includes a column 1, a presser rod 2, and a presser foot plate 13. The presser rod 2 is sleeved inside the column 1. One end of the presser rod 2 is slidably connected to a positioning block 3 inside the column 1. An air cushion 4 is glued to the top of the positioning block 3 inside the column 1. Return springs 5 ​​are provided on both sides of the presser rod 2 inside the column 1.

[0021] The column 1 has an air inlet seat 7 on one side, the air outlet of the air inlet seat 7 is connected to the air cushion 4, and the surface of the air inlet seat 7 is provided with an elastomer 8.

[0022] In this embodiment, as shown... Figure 1 and 3 As shown, through the air inlet seat 7 and the elastomer 8, external air can be drawn into the air cushion 4 for inflation by utilizing the elastic deformation generated by pressing.

[0023] The column 1 has a threaded fastening screw 6 corresponding to the pressure rod 2 connected to one side through a pre-reserved threaded hole. The pressure rod 2 has a scale line 12 on its surface, and the bottom of the pressure rod 2 is connected to the pressure foot plate 13 by bolts.

[0024] In this embodiment, as shown... Figure 2 As shown, the pressure rod 2 can be fixed by tightening the screw 6, and the position of the pressure rod 2 can be determined by the scale line 12, thereby adjusting the pressure of the pressure foot plate 13 of the pressure foot device.

[0025] The air intake end of the air intake seat 7 is provided with a one-way valve 9, the surface of the air intake seat 7 is provided with a valve core 10 on one side of the elastic body 8, and a protective cover 11 is provided on one side of the air intake seat 7 on the periphery of the elastic body 8.

[0026] In this embodiment, as shown... Figure 3 As shown, the one-way valve 9 and the valve core 10 facilitate the control of the air in and out of the air cushion 4, thereby realizing the air intake and air release operations. The protective cover 11 facilitates the protection of the elastomer 8 and the air intake seat 7.

[0027] A pressure foot handle 14 is fixedly provided on one side of the column 1.

[0028] In this embodiment, as shown... Figure 1 As shown, the presser foot handle 14 facilitates a fixed connection with the sewing machine.

[0029] It should be noted that this utility model is a sewing machine presser foot device. During operation, the operator first fixes the presser foot device to the sewing machine using the presser foot handle 14. Before using the sewing machine, the pressure of the presser foot needs to be adjusted. The operator can observe the working height of the presser rod 2 through the scale line 12. Then, by pressing the elastic body 8 to generate elastic deformation, external air is drawn into the air cushion 4 through the one-way valve 9 and the air inlet seat 7. The deformation generated by the inflation of the air cushion 4 pushes the presser rod 2 to slide downward. Thus, the pressure of the presser foot plate 13 is controlled and adjusted by sliding the presser rod 2. Finally, the fastening screw 6 is tightened to limit and fix it. The overall structure is simple and compact, low in cost and easy to operate. It is more labor-saving and convenient to use, greatly improving the flexibility of the presser foot device.

[0030] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A sewing machine presser foot device, comprising a column (1), a presser bar (2), and a presser foot plate (13), characterized in that: The column (1) is fitted with a connecting rod (2). One end of the rod (2) is slidably connected to a positioning block (3) inside the column (1). An air cushion (4) is glued to the top of the positioning block (3) inside the column (1). Return springs (5) are provided on both sides of the rod (2) inside the column (1).

2. The sewing machine presser foot device according to claim 1, characterized in that: An air inlet seat (7) is provided on one side of the column (1), the air outlet of the air inlet seat (7) is connected to the air cushion (4), and an elastomer (8) is provided on the surface of the air inlet seat (7).

3. The sewing machine presser foot device according to claim 1, characterized in that: One side of the column (1) is threaded with a fastening screw (6) corresponding to the pressure rod (2) through a reserved threaded hole. The surface of the pressure rod (2) is provided with scale lines (12). The bottom of the pressure rod (2) is connected to the pressure foot plate (13) by bolts.

4. A sewing machine presser foot device according to claim 2, characterized in that: The air intake end of the air intake seat (7) is provided with a one-way valve (9), the surface of the air intake seat (7) is provided with a valve core (10) on one side of the elastomer (8), and a protective cover (11) is provided on one side of the air intake seat (7) on the periphery of the elastomer (8).

5. A sewing machine presser foot device according to claim 1, characterized in that: A presser foot handle (14) is fixedly provided on one side of the column (1).

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