A lift and hold foot damper

Abstract

The utility model provides a kind of lifting and releasing pressure foot slow motion device, including fixed frame and pressure foot body, the pressure foot body sliding connection is in fixed frame, further include driving rod, the fixed frame is hinged with support rod by pin shaft, the pressure foot body is equipped with the connecting hole for being used to wear support rod, the driving rod is connected with support rod;The driving rod moves down makes support rod overturn along pin shaft and makes the pressure foot body move up, the driving rod moves up makes support rod overturn along pin shaft and makes the pressure foot body move down, reach the purpose of not easily making pressure foot body pressure hand.

Description

Technical Field

[0001] This utility model relates to the field of sewing machines, and in particular, to a device for easing and lowering the presser foot. Background Technology

[0002] Currently, Chinese patent CN222119586U discloses a presser foot lifting mechanism for a sewing machine, which includes a drive motor, a presser foot rod, and a presser foot. It also includes an eccentric wheel connecting rod and a lever. The drive motor has an eccentric wheel connecting rod fixed on its drive shaft. The eccentric wheel connecting rod is hinged to the lever. The other end of the lever is hinged to a guide block. The guide block is fastened to the middle of the presser foot rod. The lower end of the presser foot rod is connected to the presser foot.

[0003] It is used to move the presser foot rod, which is equipped with a presser foot, up and down during the sewing process, so as to raise or lower the presser foot to adapt to the sewing needs of different thicknesses of fabric, and to achieve the technical effect of consistent stitch density on different thicknesses of fabric as much as possible, thereby improving the sewing quality.

[0004] However, the presser foot lifting mechanism of this type of sewing machine uses a drive motor as a power source, making it difficult to control the presser foot's movement position in real time during use, which can easily cause the presser foot to press on your hand. Utility Model Content

[0005] In view of this, the purpose of this utility model is to provide a lifting and lowering presser foot slow-motion device, which realizes the movement of the presser foot manually to avoid pressing the hand with the presser foot.

[0006] To solve the above-mentioned technical problems, the technical solution of this utility model is: a lifting and lowering pressure foot easing device, including a fixed frame and a pressure foot body, the pressure foot body being slidably connected to the fixed frame, and also including a drive rod, the fixed frame being hinged to a support rod by a pin, the pressure foot body having a connecting hole for the support rod to pass through, and the drive rod being connected to the support rod.

[0007] The downward movement of the drive rod causes the support rod to flip along the pin shaft and the pressure plate body to move upward, while the upward movement of the drive rod causes the support rod to flip along the pin shaft and the pressure plate body to move downward.

[0008] To achieve the above technical solution, a downward force is applied to the drive rod manually. The drive rod moves downward, and through the lever principle, the support rod flips along the pin and moves the pressure plate upward. When the drive rod moves upward, through gravity and the lever principle, the support rod flips along the pin and moves the pressure plate downward. Thus, the pressure plate is moved manually to avoid the problem of the pressure plate pressing on the hand.

[0009] As a preferred embodiment of this utility model, it further includes a connecting seat and a pressure rod. The connecting seat is rotatably connected to the sewing machine. The upper end of the drive rod is hinged to the connecting seat. A support rod is fixedly connected to the connecting seat. A rotating block is rotatably connected to the support rod. A sliding groove is provided on the pressure rod. The rotating block is slidably connected in the sliding groove. The end of the pressure rod and the support rod away from the pressure rod body abuts against each other.

[0010] To achieve the above technical solution, when the drive rod moves down, the connecting seat rotates, the connecting seat support rod rotates along the axis of the connecting seat, and the rotating block moves along the slide groove while applying pressure to the inner wall of the slide groove, causing the pressure rod to move down. The pressure rod and the support rod abut against the end away from the pressure rod body, and the support rod body is lifted up. Similarly, when the drive rod moves up, the pressure rod body can be moved down.

[0011] In a preferred embodiment of this utility model, the connecting seat includes a rotating shaft and an adjusting rod. The rotating shaft is rotatably connected to a sewing machine, and the support rod is fixed to the rotating shaft. The adjusting rod has a fixing hole, a clamping groove communicating with the fixing hole is formed on the side wall of the adjusting rod, a threaded hole communicating with the clamping groove is formed on the adjusting rod, and a locking bolt is provided on the adjusting rod. The locking bolt passes through the clamping groove and is threadedly connected to the threaded hole.

[0012] To achieve the above technical solution, the rotating shaft is inserted into the fixed hole, and the adjusting rod is rotated along the axis of the fixed hole to adjust the initial position of the drive rod. Then, the locking bolt is tightened, the width of the clamping groove is reduced, and the adjusting rod presses against the rotating shaft to achieve a fixed connection.

[0013] In a preferred embodiment of this utility model, a reset rod is fixedly connected to the rotating shaft, an extension rod is hinged to the reset rod, a rotating block is hinged to the extension rod, the rotating block is rotatably connected to the sewing machine, and the extension rod is connected to the sewing machine through an elastic element.

[0014] To achieve the above technical solution, when a downward force is applied to the drive rod, the rotating shaft rotates, the reset rod rotates along the axis of the rotating shaft, and the reset rod pushes the extension rod to move, thereby deforming the elastic element and generating elastic force. At this time, the pressure plate body is lifted. Similarly, after the force applied to the drive rod stops, the drive rod moves upward and resets through the elastic force of the elastic element, and the pressure plate body moves downward through gravity and the lever principle.

[0015] In a preferred embodiment of this utility model, the support rod is provided with an adjustment groove, the pin is inserted into the adjustment groove, the support rod moves along the length direction of the adjustment groove to change the distance between the pin and the pressure plate body, and a limit structure is provided between the support rod and the pin.

[0016] The above technical solution allows for adjustment of the vertical movement of the compression script body, improving its practicality.

[0017] As a preferred embodiment of this utility model, the limiting structure includes a limiting plate, a limiting bolt, a positioning hole, and a waist-shaped groove. The supporting rod has a limiting hole. The positioning hole and the waist-shaped groove are both formed on the limiting plate. The pin passes through the positioning hole. The limiting bolt passes through the waist-shaped groove and is threadedly connected to the limiting hole. The limiting bolt abuts against the limiting plate.

[0018] To achieve the above technical solution, the limiting bolt is loosened, and the support rod is moved along the length of the adjusting groove, thereby adjusting the vertical distance between the pin and the support body. At the same time, the limiting bolt is moved along the length of the waist-shaped groove, and then the limiting bolt is tightened, and the limiting bolt abuts against the limiting plate. When the support rod rotates along the axis of the pin, the pressure plate body can be moved, thereby adjusting the vertical movement range of the pressure plate body.

[0019] In a preferred embodiment of this utility model, a pressure plate is fixedly connected to the pressure rod, and the pressure plate abuts against the support rod.

[0020] To achieve the above technical solution, the reliability of the support rod rotating along the pin shaft is ensured. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the external structure of this utility model;

[0022] Figure 2 A diagram illustrating the position of the booster lever;

[0023] Figure 3 This is a schematic diagram illustrating the location of the elastic element;

[0024] Figure 4 A schematic diagram showing the position of the support rod;

[0025] Figure 5 A schematic diagram showing the position of the extension rod;

[0026] Figure 6 for Figure 5 Enlarged view of point A;

[0027] Figure 7 This is a schematic diagram illustrating the structure of the regulating groove.

[0028] Reference numerals: 1. Fixing frame; 11. Guide groove; 2. Pressing foot body; 3. Tabletop; 4. Sewing machine; 5. Support rod; 51. Connecting part; 52. Connecting hole; 53. Pin; 54. Adjusting groove; 55. Protrusion; 6. Limiting structure; 61. Limiting plate; 63. Positioning hole; 64. Waist-shaped groove; 65. Limiting hole; 7. Connecting seat; 71. Rotating shaft; 72. Adjusting rod; 721. Fixing hole; 722. Clamping groove; 723. Threaded hole; 73. Support rod; 74. Rotating block; 81. Pressing rod; 82. Slide groove; 83. Pressing plate; 91. Drive rod; 92. Assist rod; 93. Reset rod; 94. Extension rod; 95. Elastic element; 96. Rotating block. Detailed Implementation

[0029] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings, so that the technical solution of this utility model can be more easily understood and mastered.

[0030] A presser foot lifting and lowering easing device includes a fixing frame 1 and a presser foot body 2. A vertically arranged guide groove 11 is provided at the end of the fixing frame 1, and the presser foot body 2 is slidably connected in the guide groove 11. The fixing frame 1 is fixed inside the sewing machine 4 and fixed on the table 3. The table 3 is located below the fixing frame 1.

[0031] The fixing frame 1 is hinged to a support rod 5 via a pin 53, which is horizontally positioned. The end of the support rod 5 has an arc-shaped connecting part 51, and the pressure plate body 2 has a connecting hole 52 for the connecting part 51 to pass through.

[0032] Pin 53 is located in the middle of support rod 5.

[0033] An adjustment groove 54, which is strip-shaped, is provided on the support rod 5. A pin 53 passes through the adjustment groove 54. Moving the support rod 5 along the length of the adjustment groove 54 changes the vertical distance between the pin 53 and the pressure plate body 2. A limit structure 6 is provided between the support rod 5 and the pin 53.

[0034] The limiting structure 6 includes a limiting plate 61, a limiting bolt, a positioning hole 63, and a waist-shaped groove 64. A circular limiting hole 65 is formed on the support rod 5. Both the positioning hole 63 and the waist-shaped groove 64 are formed on the limiting plate 61, with the limiting hole 65 corresponding to the waist-shaped groove 64. The pin 53 passes through the adjusting groove 54 and then into the positioning hole 63. The limiting bolt passes through the waist-shaped groove 64 and is threadedly connected to the limiting hole 65, causing the limiting bolt to abut against the limiting plate 61.

[0035] An arc-shaped protrusion 55 is integrally connected to the end of the support rod 5 away from the support body.

[0036] Under natural conditions, due to gravity, the support column moves downward, and the end of the support rod 5 away from the support column moves upward due to the lever principle.

[0037] The connecting seat 7 is rotatably connected to the sewing machine 4, and a support rod 73 is fixedly connected to the connecting seat 7. The support rod 73 is perpendicular to the connecting seat 7. A rotating block 74 is rotatably connected to the support rod 73. The pressure rod 81 is vertically arranged and slidably connected to the sewing machine 4. A groove 82 is formed on the side wall of the pressure rod 81, and the rotating block 74 is slidably connected in the groove 82. A pressure plate 83 is vertically fixedly connected to the lower end of the pressure rod 81, and the pressure plate 83 is used to abut against the protrusion 55.

[0038] The connecting seat 7 includes a rotating shaft 71 and an adjusting rod 72. The rotating shaft 71 is rotatably connected to the sewing machine 4, and the support rod 73 is fixed to the rotating shaft 71. A circularly shaped fixing hole 721 is provided on the adjusting rod 72, and a clamping groove 722 communicating with the fixing hole 721 is provided on the side wall of the adjusting rod 72. A threaded hole 723 communicating with the clamping groove 722 is provided on the adjusting rod 72. A locking bolt is provided on the adjusting rod 72, passing through the clamping groove 722 and threadedly connected to the threaded hole 723.

[0039] Insert the rotating shaft 71 into the fixing hole 721, rotate the adjusting rod 72 along the axis of the rotating shaft 71, so that the height position of the end of the adjusting rod 72 away from the rotating shaft 71 is adjusted, and then tighten the locking bolt to reduce the width of the clamping groove 722, so that the adjusting rod 72 clamps the rotating shaft 71, thereby achieving a fixed connection between the adjusting rod 72 and the rotating shaft 71.

[0040] The upper end of the drive rod 91 is hinged to the end of the adjusting rod 72 away from the rotating shaft 71. The lower end of the drive rod 91 is passed through the circular hole on the platform 3 and then hinged to the assist rod 92, which is hinged to the lower surface of the platform 3.

[0041] A reset rod 93 is fixedly connected to the rotating shaft 71. The reset rod 93 is located between the support rod 73 and the adjusting rod 72, and the reset rod 93 and the support rod 73 are arranged in a V-shape. An extension rod 94 is hinged to the reset rod 93, and a rotating block 96 is hinged to the extension rod 94. The rotating block 96 is rotatably connected to the sewing machine 4. The extension rod 94 is connected to the sewing machine 4 through an elastic element 95, which is a tension spring.

[0042] Apply downward pressure to the assist rod 92 with your foot, and the drive rod 91 moves downward, causing the support rod 5 to flip along the pin 53 and the pressure foot body 2 to move upward; slowly reduce the pressure applied to the assist rod 92, and through the elastic force of the elastic element 95, the drive rod 91 moves upward, causing the support rod 5 to flip along the pin 53 and the pressure foot body 2 to move downward.

[0043] Of course, the above are just typical examples of this utility model. In addition, this utility model may have many other specific implementation methods. All technical solutions formed by equivalent substitution or equivalent transformation fall within the scope of protection claimed by this utility model.

Claims

1. A device for easing and lowering a pressure foot, comprising a fixed frame (1) and a pressure foot body (2), wherein the pressure foot body (2) is slidably connected to the fixed frame (1), characterized in that: It also includes a drive rod (91), the fixed frame (1) is hinged to a support rod (5) by a pin (53), the pressure plate body (2) is provided with a connection hole (52) for the support rod (5) to pass through, and the drive rod (91) is connected to the support rod (5). The drive rod (91) moves down, causing the support rod (5) to flip along the pin (53) and the pressure plate body (2) to move up. The drive rod (91) moves up, causing the support rod (5) to flip along the pin (53) and the pressure plate body (2) to move down.

2. The lifting and lowering pressure foot easing device according to claim 1, characterized in that: It also includes a connecting seat (7) and a pressure rod (81). The connecting seat (7) is rotatably connected to the sewing machine (4). The upper end of the drive rod (91) is hinged to the connecting seat (7). The connecting seat (7) is fixedly connected to a support rod (73). A rotating block (74) is rotatably connected to the support rod (73). A sliding groove (82) is provided on the pressure rod (81). The rotating block (74) is slidably connected in the sliding groove (82). The pressure rod (81) abuts against the end of the support rod (5) away from the pressure rod body (2).

3. The lifting and lowering pressure foot easing device according to claim 2, characterized in that: The connecting seat (7) includes a rotating shaft (71) and an adjusting rod (72). The rotating shaft (71) is rotatably connected to the sewing machine (4). The support rod (73) is fixed on the rotating shaft (71). The adjusting rod (72) has a fixing hole (721). The side wall of the adjusting rod (72) has a clamping groove (722) communicating with the fixing hole (721). The adjusting rod (72) has a threaded hole (723) communicating with the clamping groove (722). The adjusting rod (72) is provided with a locking bolt. The locking bolt passes through the clamping groove (722) and is threadedly connected to the threaded hole (723).

4. The lifting and lowering pressure foot easing device according to claim 3, characterized in that: A reset rod (93) is fixedly connected to the rotating shaft (71), an extension rod (94) is hinged to the reset rod (93), a rotating block (96) is hinged to the extension rod (94), the rotating block (96) is rotatably connected to the sewing machine (4), and the extension rod (94) is connected to the sewing machine (4) through an elastic element (95).

5. A lifting and lowering pressure foot easing device according to claim 1, 2, 3, or 4, characterized in that: The support rod (5) is provided with an adjustment groove (54), the pin (53) passes into the adjustment groove (54), the support rod (5) moves along the length direction of the adjustment groove (54) to change the distance between the pin (53) and the pressure plate body (2), and a limit structure (6) is provided between the support rod (5) and the pin (53).

6. The lifting and lowering pressure foot easing device according to claim 5, characterized in that: The limiting structure (6) includes a limiting plate (61), a limiting bolt, a positioning hole (63), and a waist-shaped groove (64). The support rod (5) has a limiting hole (65). The positioning hole (63) and the waist-shaped groove (64) are both opened on the limiting plate (61). The pin (53) passes through the positioning hole (63). The limiting bolt passes through the waist-shaped groove (64) and is threadedly connected to the limiting hole (65). The limiting bolt abuts against the limiting plate (61).

7. The lifting and lowering pressure foot easing device according to claim 2, characterized in that: A pressure plate (83) is fixedly connected to the pressure rod (81), and the pressure plate (83) abuts against the support rod (5).

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