Thread breakage prevention device for sewing machine

Abstract

The utility model discloses a kind of sewing machine threaders of anti-wire breakage, it includes: threader body, the top of the threader body is perforated with sliding slot, the inner wall of the sliding slot is fixedly connected with limit slide rod, the outer wall of the limit slide rod is slidably connected with sliding block, the top of the sliding block is provided with thread hole, the side of the threader body is movably connected with plug block by screw, the side of the plug block is provided with screw hole, the inside of the screw hole is provided with screw rod, one end of the screw rod is fixedly connected with knob, the outer wall of the screw rod is fixedly connected with two limit rings, the outer wall of the screw rod is rotatably connected with connecting rod, one end of the connecting rod is fixedly connected with sleeve, the inside of the sleeve is fixedly connected with spring, the other end of the spring is fixedly connected with movable rod, the movement of sliding block can be driven by rotating screw rod, and then the position of thread hole can be adjusted, so as to facilitate the adjustment of sewing thread tension.

Description

Technical Field

[0001] This utility model relates to the field of thread guide technology, and in particular to a thread guide for sewing machines that prevents thread breakage. Background Technology

[0002] The sewing machine thread guide is a key component in a sewing machine used to guide the direction of the sewing thread, control the thread tension, and reduce thread wear through a smooth structure. Its core function is to regulate the path of the thread, ensuring that the sewing thread passes through components such as the thread clamp and take-up lever along a predetermined trajectory, and finally enters the needle hole accurately, so as to maintain the uniformity and strength of the stitches.

[0003] Excessive tension is one of the core reasons for sewing thread breakage. The position of the thread guide hole in existing sewing machines is fixed, which in turn results in fixed thread tension, making it difficult to adjust. When the thread tension is too high, the sewing thread will rub violently against the edge of the thread guide hole, which can easily lead to thread breakage. Utility Model Content

[0004] The purpose of this utility model is to provide a sewing machine thread guide that prevents thread breakage. This solves the problem that the position of the thread guide hole in existing sewing machine thread guides is fixed, which leads to a fixed tension of the sewing thread, making it inconvenient to adjust. When the tension of the sewing thread is too high, the sewing thread will rub violently against the edge of the thread guide hole, resulting in the sewing thread breaking.

[0005] To achieve the above objectives, a sewing machine thread guide that prevents thread breakage is provided, comprising: a thread guide body, a groove extending through the top of the thread guide body, a limiting slide rod fixedly connected to the inner wall of the groove, a slider slidably connected to the outer wall of the limiting slide rod, a thread hole provided at the top of the slider, an insert block movably connected to one side of the thread guide body by a screw, a screw hole provided on one side of the insert block, a screw rod provided inside the screw hole, and a knob fixedly connected to one end of the screw rod to facilitate the movement of the slider and thus facilitate the adjustment of the sewing thread tension;

[0006] Two limiting rings are fixedly connected to the outer wall of the screw. A connecting rod is rotatably connected to the outer wall of the screw. A sleeve is fixedly connected to one end of the connecting rod. A spring is fixedly connected inside the sleeve. A movable rod is fixedly connected to the other end of the spring. The other end of the movable rod is fixedly connected to one side of the insert block to facilitate locking of the screw.

[0007] According to the aforementioned anti-breakage sewing machine thread guide, a limiting hole is provided on the side of the slider, and the slider is slidably connected to the outer wall of the limiting slide rod through the limiting hole, which facilitates the limiting of the slider.

[0008] According to the sewing machine thread guide described above, the inner wall of the screw hole and the outer wall of the screw rod are both provided with threads, and the screw hole and the screw rod are engaged with each other through the threads to facilitate the movement of the slider.

[0009] According to the aforementioned anti-broken thread guide for sewing machines, a rotating shaft seat is fixedly installed on one side of the slider, and one end of the screw is rotatably connected to the rotating shaft seat to facilitate the rotation of the screw.

[0010] According to the aforementioned anti-broken thread guide for sewing machines, a fixing hole is provided on one side of the thread guide body, and the number of thread guide holes is three, and the three thread guide holes are arranged in an equilateral triangle.

[0011] According to the sewing machine thread guide device for preventing thread breakage, one end of the connecting rod has a through hole, and the connecting rod is rotatably connected to the outer wall of the screw through the through hole. The connecting rod is located between two limiting rings to facilitate the rotation of the screw.

[0012] According to the aforementioned anti-breakage sewing machine thread guide, the shape and size of the movable rod are matched with the shape and size of the sleeve, and the movable rod is slidably connected to the inner wall of the sleeve to facilitate the movement of the movable rod.

[0013] According to the aforementioned anti-broken thread guide for a sewing machine, a second positioning hole is provided on one side of the connecting rod, and the second positioning hole is connected to the through hole. A plurality of first positioning holes are provided between the two limiting rings on the outer wall of the screw. The first positioning holes and the second positioning holes are connected by fixing bolts to facilitate locking of the screw.

[0014] The above-mentioned solution has the following beneficial effects:

[0015] 1. This anti-breakage sewing machine thread guide features a sliding groove inside the thread guide body and a screw hole on one side of the insert block. A screw rod is installed in the screw hole, and rotating the screw rod moves the slider, thereby adjusting the position of the thread guide hole on the slider. This facilitates the adjustment of sewing thread tension. When the sewing thread tension is too high, the tension can be reduced by adjusting the position of the thread guide hole, thus preventing the sewing thread from breaking and improving the practicality of the anti-breakage sewing machine thread guide.

[0016] 2. This anti-breakage sewing machine thread guide has a rotating connecting rod on the outer wall of the screw. A second positioning hole is opened on one side of the connecting rod, which is connected to the through hole. A first positioning hole is opened between the two limiting rings of the screw. The first positioning hole and the second positioning hole are connected by a fixing bolt, which can lock the screw and prevent it from rotating when the sewing machine is working, thus improving the stability of the sewing machine during operation.

[0017] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments;

[0019] Figure 1 This is a three-dimensional structural diagram of a sewing machine thread guide that prevents thread breakage according to the present invention;

[0020] Figure 2 This is a three-dimensional structural diagram of a sewing machine thread guide that prevents thread breakage according to the present invention;

[0021] Figure 3 This is a three-dimensional structural diagram of the slider of a sewing machine thread guide that prevents thread breakage, according to the present invention.

[0022] Figure 4 This is a three-dimensional structural diagram of the connecting rod of the sewing machine thread guide according to the present invention;

[0023] Figure 5 This utility model relates to a sewing machine thread guide that prevents thread breakage. Figure 4 A sectional view;

[0024] Figure 6 This is a three-dimensional structural diagram of the screw of a sewing machine thread guide that prevents thread breakage, according to the present invention.

[0025] Legend:

[0026] 1. Cable guide body; 2. Fixing hole; 3. Slide groove; 4. Limiting slide rod; 5. Sliding block; 6. Cable guide hole; 7. Limiting hole; 8. Screw hole; 9. Screw; 10. Rotating shaft seat; 11. Limiting ring; 12. Knob; 13. Positioning hole one; 14. Connecting rod; 15. Through hole; 16. Positioning hole two; 17. Sleeve; 18. Spring; 19. Movable rod; 20. Insert block; 21. Screw. Detailed Implementation

[0027] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but they should not be construed as limiting the scope of protection of the present utility model.

[0028] Reference Figure 1-6This utility model provides a sewing machine thread guide to prevent thread breakage, comprising: a thread guide body 1, a groove 3 extending through the top of the thread guide body 1, a limiting slide rod 4 fixedly connected to the inner wall of the groove 3, a slider 5 slidably connected to the outer wall of the limiting slide rod 4, a thread hole 6 at the top of the slider 5, an insert block 20 movably connected to one side of the thread guide body 1 by a screw 21, facilitating the installation and removal of the insert block 20, thereby facilitating the installation and removal of the slider 5, a screw hole 8 on one side of the insert block 20, a screw rod 9 inside the screw hole 8, a knob 12 fixedly connected to one end of the screw rod 9, rotating the screw rod 9 can drive one end of the screw rod 9 to push the slider 5 to move, thereby driving the thread hole 6 to move, thus facilitating the adjustment of the sewing thread tension; when the sewing thread tension is too high, its tension can be reduced to prevent the sewing thread from breaking.

[0029] Two limiting rings 11 are fixedly connected to the outer wall of the screw 9. A connecting rod 14 is rotatably connected to the outer wall of the screw 9. A sleeve 17 is fixedly connected to one end of the connecting rod 14. A spring 18 is fixedly connected inside the sleeve 17. A movable rod 19 is fixedly connected to the other end of the spring 18. The other end of the movable rod 19 is fixedly connected to one side of the insert block 20 to facilitate locking of the screw 9.

[0030] A limiting hole 7 is provided on the side of the slider 5. The slider 5 is slidably connected to the outer wall of the limiting slide rod 4 through the limiting hole 7. The limiting slide rod 4 can limit the slider 5, thereby improving the stability of the slider 5 during movement.

[0031] Both the inner wall of the screw hole 8 and the outer wall of the screw rod 9 are provided with threads. The screw hole 8 and the screw rod 9 are engaged with each other through the threads. When the screw rod 9 is rotated, one end of the screw rod 9 will push the slider 5 to move, which facilitates the adjustment of the position of the wire hole 6.

[0032] A rotating shaft seat 10 is fixedly installed on one side of the slider 5, and one end of the screw 9 is rotatably connected to the rotating shaft seat 10 to facilitate the rotation of the screw 9.

[0033] A fixing hole 2 is provided on one side of the cable guide body 1, and there are three cable guide holes 6, which are arranged in an equilateral triangle.

[0034] One end of the connecting rod 14 is provided with a through hole 15. The connecting rod 14 is rotatably connected to the outer wall of the screw 9 through the through hole 15, and the connecting rod 14 is located between two limiting rings 11 to facilitate the rotation of the screw 9.

[0035] The shape and size of the movable rod 19 are matched with the shape and size of the sleeve 17. The movable rod 19 is slidably connected to the inner wall of the sleeve 17. When the screw 9 rotates, the movable rod 19 will slide inside the sleeve 17 as the screw 9 rotates, which facilitates the subsequent locking of the screw 9.

[0036] A second positioning hole 16 is provided on one side of the connecting rod 14, and the second positioning hole 16 is connected to the through hole 15. Multiple first positioning holes 13 are provided between the two limiting rings 11 on the outer wall of the screw 9. The first positioning hole 13 and the second positioning hole 16 are connected by fixing bolts. The screw 9 and the connecting rod 14 can be locked by fixing bolts, thereby preventing the screw 9 from rotating when the sewing machine is working and improving the stability of the sewing machine when it is working.

[0037] Working principle: When it is necessary to adjust the tension of the sewing thread, remove the fixing bolts in positioning hole 13 and positioning hole 26, rotate screw 9, one end of screw 9 drives slider 5 to slide in slide groove 3, which in turn drives the thread guide hole 6 to move, thereby adjusting the tension of the sewing thread. For example, when the tension of the sewing thread is too high, the tension of the sewing thread can be reduced by adjusting the position of thread guide hole 6, making it less likely to break. After adjustment, align the position of positioning hole 13 with positioning hole 26, and reinsert and tighten the fixing bolts to lock screw 9, preventing it from accidentally rotating during sewing machine operation and improving the stability of the sewing machine during operation.

[0038] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. A sewing machine thread guide to prevent thread breakage, comprising: The cable guide body (1) is characterized in that a sliding groove (3) is provided through the top of the cable guide body (1), a limiting slide rod (4) is fixedly connected to the inner wall of the sliding groove (3), a slider (5) is slidably connected to the outer wall of the limiting slide rod (4), a cable hole (6) is provided on the top of the slider (5), and a plug (20) is movably connected to one side of the cable guide body (1) by a screw (21). A screw hole (8) is provided on one side of the plug (20), a screw rod (9) is provided inside the screw hole (8), and a knob (12) is fixedly connected to one end of the screw rod (9). Two limiting rings (11) are fixedly connected to the outer wall of the screw (9). A connecting rod (14) is rotatably connected to the outer wall of the screw (9). A sleeve (17) is fixedly connected to one end of the connecting rod (14). A spring (18) is fixedly connected inside the sleeve (17). A movable rod (19) is fixedly connected to the other end of the spring (18). The other end of the movable rod (19) is fixedly connected to one side of the insert block (20).

2. The sewing machine thread guide for preventing thread breakage according to claim 1, characterized in that, The slider (5) has a limiting hole (7) on its side, and the slider (5) is slidably connected to the outer wall of the limiting slide rod (4) through the limiting hole (7).

3. A sewing machine thread guide to prevent thread breakage according to claim 1, characterized in that, The inner wall of the screw hole (8) and the outer wall of the screw rod (9) are both provided with threads, and the screw hole (8) and the screw rod (9) are engaged with each other through the threads.

4. A sewing machine thread guide to prevent thread breakage according to claim 1, characterized in that, A rotating shaft seat (10) is fixedly installed on one side of the slider (5), and one end of the screw (9) is rotatably connected to the rotating shaft seat (10).

5. A sewing machine thread guide to prevent thread breakage according to claim 1, characterized in that, The cable guide body (1) has a fixing hole (2) on one side, and there are three cable guide holes (6), which are arranged in an equilateral triangle.

6. A sewing machine thread guide to prevent thread breakage according to claim 1, characterized in that, One end of the connecting rod (14) is provided with a through hole (15), and the connecting rod (14) is rotatably connected to the outer wall of the screw (9) through the through hole (15), and the connecting rod (14) is located between two limiting rings (11).

7. A sewing machine thread guide to prevent thread breakage according to claim 1, characterized in that, The shape and size of the movable rod (19) are matched with the shape and size of the sleeve (17), and the movable rod (19) is slidably connected to the inner wall of the sleeve (17).

8. A sewing machine thread guide to prevent thread breakage according to claim 6, characterized in that, The connecting rod (14) has a positioning hole 2 (16) on one side, and the positioning hole 2 (16) is connected to the through hole (15). The screw (9) has multiple positioning holes 1 (13) between the two limiting rings (11) on the outer wall. The positioning holes 1 (13) and positioning holes 2 (16) are connected by fixing bolts.

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