Presser foot lifting mechanism of sewing machine

Abstract

The utility model relates to the technical field of sewing machines, and discloses a presser foot lifting mechanism of a sewing machine, which comprises the sewing machine, a motor is fixedly connected on the side wall of the sewing machine, an output shaft of the motor extends into the sewing machine and is fixedly connected with a turntable, and a connecting rod is fixedly connected on the side wall of the turntable. The rod wall of the connecting rod is movably sleeved with a movable rod, a connecting cylinder is fixedly connected to the bottom of the movable rod, a damping pad is slidably arranged on the inner wall of the connecting cylinder, and a pressing rod is fixedly connected to the bottom of the damping pad. The output shaft of the motor rotates to drive the rotating disc to rotate, the rotating disc rotates to drive the connecting rod to move, the movable rod is movably connected with the connecting rod in a sleeved mode to move along with the rotating disc, the movable rod moves to drive the connecting cylinder, the pressing rod and the presser lifting foot to move along the rotating track of the rotating disc, sewing cloth is moved, automatic feeding is conducted, and sewing efficiency is improved.

Description

Technical Field

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

[0002] A sewing machine is a machine used to sew or mend clothes and fabrics. It is usually composed of a body, a sewing machine head, an operating pedal and a bobbin. When the pedal is stepped on, the needle will move up and down through mechanical transmission. Through the cooperation of the thread drum and the thread wheel, the thread is taken out from the bobbin and passed through the needle hole on the fabric to complete the needle and thread cycle.

[0003] In the prior art, during the use of the sewing machine, a presser foot lifter is used for auxiliary operations to ensure the stability of the fabric during the sewing process. However, the trajectory of some presser foot lifters is fixed when they move up and down, which makes it inconvenient to move the fabric by itself. Manual material refilling is required, which affects the sewing efficiency of the sewing machine. Utility Model Content

[0004] The utility model aims to solve the problem in the prior art that the track of some presser foot lifters is fixed when they move up and down, which makes it inconvenient to move and refill fabrics by oneself and requires manual refilling, thus affecting the sewing efficiency of the sewing machine. A presser foot lifter mechanism for a sewing machine is proposed.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A presser foot lifting mechanism of a sewing machine comprises a sewing machine, wherein a motor is fixedly connected to the side wall of the sewing machine, the output shaft of the motor extends to the interior of the sewing machine and is fixedly connected to a turntable, a connecting rod is fixedly connected to the side wall of the turntable, a movable rod is movably sleeved on the rod wall of the connecting rod, a connecting cylinder is fixedly connected to the bottom of the movable rod, a damping pad is slidably provided on the inner wall of the connecting cylinder, a pressure rod is fixedly connected to the bottom of the damping pad, a presser foot lifting mechanism is fixedly connected to the bottom of the pressure rod, an opening is provided at the bottom of the sewing machine, the rod wall of the movable rod is slidably arranged on the inner wall of the opening, a transmission frame is provided at the bottom of the sewing machine, a gap is provided on the inner wall of the bottom end of the transmission frame and a needle is clamped thereon.

[0007] Preferably, the inner wall of the sewing machine is provided with a strip groove, the inner wall of the sewing machine is provided with a rectangular rod slidably disposed thereon, the rod wall of the movable rod is provided with a strip opening, and the rod wall of the rectangular rod is slidably disposed on the inner wall of the strip opening.

[0008] Preferably, a spring is fixedly connected to the inner wall of the connecting tube, and the bottom of the spring is pressed against the upper surface of the damping pad.

[0009] Preferably, a rectangular opening is provided on the inner wall of the presser foot lifter, and a rubber pad is fixedly connected to the bottom of the presser foot lifter.

[0010] Preferably, the transmission frame is fixedly connected to two connecting plates on the side wall of the gap, and a threaded hole is formed on the inner wall of the right connecting plate.

[0011] Preferably, the inner wall of the left connecting plate is rotatably connected with a threaded rotating rod, the rod wall thread of the threaded rotating rod is on the right side, and the connecting plate is located on the inner wall of the threaded hole.

[0012] Compared with the prior art, the utility model provides a presser foot lifting mechanism for a sewing machine, which has the following beneficial effects:

[0013] 1. The presser foot lifting mechanism of the sewing machine drives the turntable to rotate through the output shaft of the motor, and the rotation of the turntable drives the connecting rod to move. The movable rod is movably sleeved with the connecting rod to follow the movement of the turntable. The movement of the movable rod drives the connecting cylinder, the presser rod and the presser foot lifting mechanism to move along the track of the turntable rotation, so as to move the sewing fabric, automatically refill the fabric, and improve the sewing efficiency.

[0014] 2. The presser foot lifting mechanism of the sewing machine is limited by the movable rod through the rectangular rod, so that the movable rod is always set vertically to prevent tilting. The rod wall of the rectangular rod slides along the inner wall of the strip groove and the strip mouth without affecting the movement effect of the movable rod. The rubber pad increases the friction between the presser foot lifting and the cloth to ensure the feeding effect.

[0015] 3. The presser foot lifting mechanism of the sewing machine can make the two connecting plates approach each other by rotating the threaded rotating rod along the inner wall of the threaded hole, thereby reducing the gap at the bottom of the transmission frame and ensuring the clamping effect on the needle. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a structural schematic diagram of a presser foot lifting mechanism of a sewing machine proposed by the utility model;

[0017] Figure 2 for Figure 1 A top view of the partial structure of the sewing machine;

[0018] Figure 3 for Figure 1 A schematic diagram of the structure of the local A part;

[0019] Figure 4 for Figure 1 Schematic diagram of the enlarged structure of part B in the middle.

[0020] In the figure: 1 sewing machine, 2 motor, 3 turntable, 4 connecting rod, 5 movable rod, 6 connecting tube, 7 damping pad, 8 pressure rod, 9 presser foot lifter, 10 rectangular rod, 11 spring, 12 rubber pad, 13 transmission frame, 14 needle, 15 connecting plate, 16 threaded rotating rod. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0022] Reference Figure 1-4 A presser foot lifting mechanism of a sewing machine comprises a sewing machine 1, a motor 2 is fixedly connected to the side wall of the sewing machine 1, the output shaft of the motor 2 extends to the inside of the sewing machine 1 and is fixedly connected to a turntable 3, a connecting rod 4 is fixedly connected to the side wall of the turntable 3, a movable rod 5 is movably sleeved on the rod wall of the connecting rod 4, a connecting tube 6 is fixedly connected to the bottom of the movable rod 5, a damping pad 7 is slidably provided on the inner wall of the connecting tube 6, a pressure rod 8 is fixedly connected to the bottom of the damping pad 7, a presser foot lifting mechanism 9 is fixedly connected to the bottom of the pressure rod 8, an opening is provided at the bottom of the sewing machine 1, the rod wall of the movable rod 5 is slidably arranged on the inner wall of the opening, a transmission frame 13 is provided at the bottom of the sewing machine 1, a gap is provided on the inner wall of the bottom end of the transmission frame 13 and a needle 14 is clamped.

[0023] A strip groove is provided on the inner wall of the sewing machine 1, and a rectangular rod 10 is slidably provided on the inner wall of the strip groove. A strip opening is provided on the rod wall of the movable rod 5, and the rod wall of the rectangular rod 10 is slidably arranged on the inner wall of the strip opening. A spring 11 is fixedly connected to the inner wall of the connecting tube 6, and the bottom of the spring 11 is pressed against the upper surface of the damping pad 7. A rectangular opening is provided on the inner wall of the presser foot lift 9, and a rubber pad 12 is fixedly connected to the bottom of the presser foot lift 9.

[0024] When in use, the turntable 3 can be driven to rotate by the output shaft of the motor 2, and the rotation of the turntable 3 can drive the connecting rod 4 to move. The movable rod 5 is movably connected to the connecting rod 4 and can move with the turntable 3. The movement of the movable rod 5 can drive the connecting tube 6, the pressure rod 8 and the presser foot 9 to move along the rotation trajectory of the turntable 3, so that the sewing cloth can be moved, and the material can be automatically replenished to improve the sewing efficiency. The movable rod 5 is limited by the rectangular rod 10, so that the movable rod 5 is always set vertically to prevent tilting. The sliding of the rod wall of the rectangular rod 10 along the inner wall of the strip groove and the strip mouth will not affect the movement effect of the movable rod 5. The rubber pad 12 can increase the friction between the presser foot 9 and the cloth to ensure the replenishment effect.

[0025] In order to ensure the clamping effect of the needle 14, Figure 1-4As shown, the transmission frame 13 is located on the side wall of the gap and is fixedly connected to two connecting plates 15. A threaded hole is opened on the inner wall of the right connecting plate 15, and a threaded rotating rod 16 is rotatably connected to the inner wall of the left connecting plate 15. The rod wall of the threaded rotating rod 16 is threaded on the right side, and the connecting plate 15 is located on the inner wall of the threaded hole.

[0026] By rotating the threaded rotating rod 16 along the inner wall of the threaded hole, the two connecting plates 15 can be brought closer to each other, so that the gap at the bottom of the transmission frame 13 is reduced, and the clamping effect on the needle 14 can be ensured.

[0027] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A presser foot lifting mechanism for a sewing machine, comprising a sewing machine (1), characterized in that: A motor (2) is fixedly connected to the side wall of the sewing machine (1); the output shaft of the motor (2) extends into the interior of the sewing machine (1) and is fixedly connected to a turntable (3); a connecting rod (4) is fixedly connected to the side wall of the turntable (3); a movable rod (5) is movably sleeved on the rod wall of the connecting rod (4); a connecting tube (6) is fixedly connected to the bottom of the movable rod (5); a damping pad (7) is slidably provided on the inner wall of the connecting tube (6); a pressure rod (8) is fixedly connected to the bottom of the damping pad (7); a presser foot (9) is fixedly connected to the bottom of the pressure rod (8); an opening is provided at the bottom of the sewing machine (1); the rod wall of the movable rod (5) is slidably arranged on the inner wall of the opening; a transmission frame (13) is provided at the bottom of the sewing machine (1); a gap is provided on the inner wall of the bottom end of the transmission frame (13) and a needle (14) is clamped thereon.

2. The presser foot lifting mechanism of a sewing machine according to claim 1, characterized in that: The inner wall of the sewing machine (1) is provided with a strip groove, a rectangular rod (10) is slidably provided on the inner wall of the strip groove of the sewing machine (1), a strip opening is provided on the rod wall of the movable rod (5), and the rod wall of the rectangular rod (10) is slidably provided on the inner wall of the strip opening.

3. The presser foot lifting mechanism of a sewing machine according to claim 1, characterized in that: A spring (11) is fixedly connected to the inner wall of the connecting tube (6), and the bottom of the spring (11) is pressed against the upper surface of the damping pad (7).

4. The presser foot lifting mechanism of a sewing machine according to claim 1, characterized in that: The inner wall of the presser foot lifter (9) is provided with a rectangular opening, and the bottom of the presser foot lifter (9) is fixedly connected with a rubber pad (12).

5. The presser foot lifting mechanism of a sewing machine according to claim 1, characterized in that: The transmission frame (13) is fixedly connected to two connecting plates (15) on the side wall of the gap, and a threaded hole is provided on the inner wall of the right connecting plate (15).

6. The presser foot lifting mechanism of a sewing machine according to claim 5, characterized in that: The inner wall of the left connecting plate (15) is rotatably connected with a threaded rotating rod (16), the rod wall of the threaded rotating rod (16) is threaded on the right side, and the connecting plate (15) is located on the inner wall of the threaded hole.

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