Thread guiding mechanism for sewing machine

Abstract

The utility model discloses a thread leading mechanism for a sewing machine, which relates to the technical field of textile equipment and comprises a workbench, a bobbin, a tensioning wheel and a buffer wheel are respectively and rotatably arranged at the front end of the workbench, a lantern ring is arranged between the bobbin and the tensioning wheel, and the buffer wheel is arranged on one side, far away from the bobbin, of the tensioning wheel. The outer wall of the bobbin is sleeved with a sewing thread, one end of the sewing thread sequentially penetrates through the interior of the lantern ring, the lower portion of the tensioning wheel and the upper portion of the buffering wheel, and a first sliding groove and a second sliding groove are formed in the front end face of the workbench. The effect of adjusting the tensioning degree of the sewing thread is achieved, and the problems that a thread feeding structure of a traditional sewing machine is single, the tensioning degree of the sewing thread is inconvenient to adjust in the thread feeding process, and consequently the thread is prone to falling off when the thread is too loose and is prone to breaking when the thread is too tight are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of textile equipment, in particular to a thread guide mechanism for a 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, so that one or more layers of sewing materials are interwoven or sewn together. The sewing machine can sew fabrics such as cotton, linen, silk, wool, and synthetic fibers, and products such as leather, plastic, and paper. The stitches are neat, beautiful, flat, and firm, the sewing speed is fast, and it is easy to use.

[0003] At present, the thread feeding structure of sewing machines is relatively simple, and it is inconvenient to adjust the tension of the sewing thread during the thread feeding process, which causes the thread to easily fall off when it is too loose and to easily break when it is too tight. Based on this, we propose an improved thread feeding mechanism for sewing machines. Utility Model Content

[0004] The main purpose of the utility model is to provide a thread guide mechanism for a sewing machine, which can effectively solve the technical problems in the background technology.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0006] A thread guiding mechanism for a sewing machine comprises a workbench, wherein a thread drum, a tensioning wheel and a buffer wheel are rotatably arranged at the front end of the workbench, a sleeve ring is arranged between the thread drum and the tensioning wheel, the buffer wheel is arranged at a position on the side of the tensioning wheel away from the thread drum, a sewing thread is sleeved on the outer wall of the thread drum, and one end of the sewing thread passes through the sleeve ring, below the tensioning wheel and above the buffer wheel in sequence.

[0007] As a further solution of the utility model, the front end surface of the workbench is respectively provided with two slide grooves 1 and slide groove 2, the two slide grooves 1 are rotatably connected with screw rods 1, the outer walls of the two screw rods 1 are threadedly sleeved with sliders 1, the wire drum and the tensioning wheel are respectively rotatably connected to the front end outer walls of the two sliders 1, the slide groove 2 is fixedly connected with a slide rod 1, the outer wall of the slide rod 1 is slidably sleeved with a slider 2, and the buffer wheel is rotatably connected to the front end outer wall of the slider 2.

[0008] As a further solution of the utility model, a spring is fixedly connected between the second slide block and the second slide slot, and the spring is movably sleeved on an outer end of the first slide rod.

[0009] As a further solution of the utility model, a mounting column is fixedly connected to the front end of the workbench, and the collar is rotatably connected to the front end of the mounting column.

[0010] As a further solution of the utility model, a connecting shaft is rotatably sleeved in the tensioning wheel, one end of the connecting shaft is fixedly connected to a slider, and mounting frames are fixedly sleeved on the front and rear outer walls of the connecting shaft, and a pressure wheel is rotatably provided on the mounting frame.

[0011] As a further solution of the utility model, the mounting frame is rotatably and fixedly connected with a screw rod 2 and a slide rod 2 respectively, and a slide block 3 is sleeved on the outer walls of the screw rod 2 and the slide rod 2, and the pressure wheel is rotatably connected between the two slide blocks 3.

[0012] As a further solution of the utility model, the two sliding blocks three are respectively threaded and slidably sleeved on the outer walls of the screw rod two and the sliding rod two, and the wheel grooves opened on the outer ring of the pressure wheel and the outer wall of the tensioning wheel are matched with each other.

[0013] The beneficial effects of the utility model are as follows:

[0014] By arranging the bobbin, the ring, the tensioning wheel and the buffer wheel structure to cooperate with each other, the sewing thread is released from the bobbin, passes through the inside of the ring, the bottom of the tensioning wheel and the top of the buffer wheel in sequence, and then passes out. The tension of the sewing thread can be adjusted by driving the slider to move up and down by the screw rod, so as to prevent the sewing thread from being too loose and causing it to fall off the wheel or get entangled. At the same time, the buffer wheel can be used to buffer the force of the sewing thread, so as to avoid the sewing thread being too tight and causing it to break.

[0015] By fixing the sleeve mounting frame structure on the outer wall of the connecting shaft on which the tensioning wheel is rotatably sleeved, and using the second screw rod on the mounting frame to drive the sliding block three to move up and down, the pressure wheel can be pressed down toward the tensioning wheel to prevent the sewing thread from falling out of the groove. The sewing thread can also be pressed tightly when the device is not in use to avoid accidental pulling and movement of the sewing thread, which is convenient for continued use during next sewing, and has practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of one side structure of a thread guide mechanism for a sewing machine according to the utility model;

[0017] Figure 2 This is a schematic diagram of the structure of the other side of a thread guide mechanism for a sewing machine according to the utility model;

[0018] Figure 3 This is a schematic diagram of a pressure wheel connection structure of a thread guide mechanism for a sewing machine according to the utility model;

[0019] Figure 4 The utility model is a front view of a thread guide mechanism for a sewing machine.

[0020] In the figure: 1. workbench; 2. slideway 1; 3. screw rod 1; 4. slider 1; 5. bobbin; 6. tensioning wheel; 7. mounting column; 8. collar; 9. slideway 2; 10. slide rod 1; 11. slider 2; 12. spring; 13. buffer wheel; 14. sewing thread; 15. connecting shaft; 16. mounting frame; 17. slide rod 2; 18. screw rod 2; 19. slider 3; 20. pressure wheel. DETAILED DESCRIPTION

[0021] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific implementation methods.

[0022] like Figure 1-4 As shown, a thread guiding mechanism for a sewing machine comprises a workbench 1, a bobbin 5, a tensioning wheel 6 and a buffer wheel 13 are rotatably arranged at the front end of the workbench 1, a sleeve 8 is arranged between the bobbin 5 and the tensioning wheel 6, the buffer wheel 13 is arranged at a position of the tensioning wheel 6 away from the bobbin 5, a sewing thread 14 is sleeved on the outer wall of the bobbin 5, and one end of the sewing thread 14 passes through the sleeve 8, below the tensioning wheel 6 and above the buffer wheel 13 in sequence.

[0023] In this embodiment, the front end surface of the workbench 1 is respectively provided with two slide grooves 2 and slide grooves 9, the two slide grooves 2 are rotatably connected with screw rods 3, the outer walls of the two screw rods 3 are threadedly sleeved with sliders 4, the bobbin 5 and the tensioning wheel 6 are rotatably connected to the outer walls of the front ends of the two sliders 4, the slide groove 2 9 is fixedly connected with a slide rod 10, the outer wall of the slide rod 10 is slidably sleeved with a slider 2 11, and the buffer wheel 13 is rotatably connected to the outer wall of the front end of the slider 2 11.

[0024] In this embodiment, a spring 12 is fixedly connected between the slider 11 and the slide groove 9. The spring 12 is movably sleeved on the outer end of the slide rod 10. The spring 12 buffers the pressure on the sewing thread 14, which can effectively reduce the possibility of the sewing thread 14 breaking due to being too tight.

[0025] In this embodiment, a mounting column 7 is fixedly connected to the front end of the workbench 1 , and a collar 8 is rotatably connected to the front end of the mounting column 7 . The collar 8 guides the sewing thread 14 .

[0026] In this embodiment, a connecting shaft 15 is rotatably sleeved inside the tensioning wheel 6, one end of the connecting shaft 15 is fixedly connected to a slider 4, a mounting frame 16 is fixedly sleeved on the front and rear outer walls of the connecting shaft 15, a pressure wheel 20 is rotatably provided on the mounting frame 16, a screw rod 18 and a slide rod 17 are rotatably and fixedly connected to the mounting frame 16, a slide rod 3 19 is sleeved on the outer walls of the screw rod 18 and the slide rod 17, the pressure wheel 20 is rotatably connected between the two slide rods 3 19, and the sewing thread 14 is limited by the pressure wheel 20, so that the sewing thread 14 on the tensioning wheel 6 can be prevented from falling out of the groove.

[0027] In this embodiment, the two sliders 3 19 are respectively threaded and slidably sleeved on the outer walls of the screw rod 2 18 and the slide rod 2 17, and the wheel grooves opened on the outer ring of the pressure wheel 20 and the outer wall of the tensioning wheel 6 are matched with each other, which can effectively improve the degree of fit when the pressure wheel 20 presses the tensioning wheel 6.

[0028] It should be noted that the utility model is a thread guide mechanism for a sewing machine. When in use, one end of the sewing thread 14 on the bobbin 5 passes through the ring 8 and passes between the tensioning wheel 6 and the pressure wheel 20, and then passes through the top of the buffer wheel 13 and is fixed in the needle hole before use. At the same time, the screw rod 13 is rotated to drive the slider 14 or the slider 2 11 to move, so as to adjust the position of the bobbin 5 and the tensioning wheel 6, so that the sewing thread 14 can be properly tightened. During the adjustment process, the sewing thread 14 will transfer the force to the slider 2 11 through the buffer wheel 13, so that the force can be buffered by the spring 12 to avoid the situation where the sewing thread 14 is too tight and causes disconnection.

[0029] During the operation of the above-mentioned sewing machine, by rotating the screw rod 2 18 to drive the slider 3 19 to descend, the pressure wheel 20 can be driven to press against the tensioning wheel 6, so that the sewing thread 14 can stably pass through the wheel groove of the tensioning wheel 6 to avoid slipping out of the groove. At the same time, after stopping using the sewing machine, the tensioning wheel 6 can be directly pressed by the pressure wheel 20 to tighten the sewing thread 14 to avoid accidental movement of the sewing thread 14, which is convenient for direct use next time.

[0030] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A thread guiding mechanism for a sewing machine, comprising a workbench (1), characterized in that: A bobbin (5), a tensioning wheel (6) and a buffer wheel (13) are rotatably arranged at the front end of the workbench (1), a sleeve (8) is arranged between the bobbin (5) and the tensioning wheel (6), the buffer wheel (13) is arranged at a position on the side of the tensioning wheel (6) away from the bobbin (5), a sewing thread (14) is sleeved on the outer wall of the bobbin (5), and one end of the sewing thread (14) is sequentially passed through the sleeve (8), below the tensioning wheel (6) and above the buffer wheel (13).

2. A thread guide mechanism for a sewing machine according to claim 1, characterized in that: The front end surface of the workbench (1) is provided with two slide grooves (2) and two slide grooves (9), the two slide grooves (2) are rotatably connected with screw rods (3), the outer walls of the two screw rods (3) are threadedly sleeved with sliders (4), the bobbin (5) and the tensioning wheel (6) are rotatably connected to the front end outer walls of the two sliders (4), the slide groove (9) is fixedly connected with a slide rod (10), the outer wall of the slide rod (10) is slidably sleeved with a slider (11), and the buffer wheel (13) is rotatably connected to the front end outer wall of the slider (11).

3. A thread guide mechanism for a sewing machine according to claim 2, characterized in that: A spring (12) is fixedly connected between the second slide block (11) and the second slide groove (9), and the spring (12) is movably sleeved on the outer end of the first slide bar (10).

4. A thread guide mechanism for a sewing machine according to claim 1, characterized in that: The front end of the workbench (1) is fixedly connected to a mounting column (7), and the sleeve ring (8) is rotatably connected to the front end of the mounting column (7).

5. A thread guiding mechanism for a sewing machine according to claim 1, characterized in that: A connecting shaft (15) is rotatably sleeved inside the tension wheel (6), one end of the connecting shaft (15) is fixedly connected to a slider (4), and mounting frames (16) are fixedly sleeved on the front and rear outer walls of the connecting shaft (15), and a pressure wheel (20) is rotatably arranged on the mounting frame (16).

6. A thread guide mechanism for a sewing machine according to claim 5, characterized in that: The mounting frame (16) is rotatably and fixedly connected to a screw rod (18) and a slide rod (17), respectively. The outer walls of the screw rod (18) and the slide rod (17) are sleeved with a slide block (19). The pressure wheel (20) is rotatably connected between the two slide blocks (19).

7. A thread guide mechanism for a sewing machine according to claim 6, characterized in that: The two sliders (19) are respectively threaded and slidably sleeved on the outer walls of the screw rod (18) and the slide rod (17), and the wheel grooves on the outer ring of the pressure wheel (20) and the outer wall of the tension wheel (6) are matched with each other.

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