Outer threading mechanism of sewing machine

Abstract

The utility model provides an outer threading mechanism of a sewing machine. The outer threading mechanism comprises a sewing machine body, a base plate and a thread raising arm are arranged on the outer side of the sewing machine body, a first thread guide sleeve and a mounting seat are arranged on the base plate, a lifting column is adjustably connected to the mounting seat, the lifting column can be adjusted up and down, and a second thread guide sleeve corresponding to the first thread guide sleeve is arranged on the lifting column; a third wire guide sleeve is arranged on the wire raising arm; a sewing thread sequentially penetrates through the first thread guide sleeve, the second thread guide sleeve and the third thread guide sleeve. According to the sewing machine, the first thread guide sleeve, the second thread guide sleeve and the third thread guide sleeve are arranged on the outer side of the sewing machine body, the sewing thread sequentially penetrates through the first thread guide sleeve, the second thread guide sleeve and the third thread guide sleeve, and the first thread guide sleeve, the second thread guide sleeve and the third thread guide sleeve jointly guide and restrain the threading path of the sewing thread. Therefore, the routing path of the sewing thread is more regular, the routing orderliness is greatly improved, and the problem that the thread is wound due to irregular routing is solved.

Description

Technical Field

[0001] This utility model relates to the field of sewing machine technology, and in particular to an external thread feeding mechanism for a sewing machine. Background Technology

[0002] In existing sewing machines, as the number of spools increases, the external thread path also increases, with some sewing machines having 6-8 spools or even more. Some sewing machines use an internal thread routing system, where the sewing thread passes through the machine's interior, concealing most of the thread path within the machine body. However, internal thread routing is more difficult and inconvenient to operate, and with the increase in the number of threads, it is prone to thread tangling inside the machine, which is quite troublesome to resolve.

[0003] External thread routing, on the other hand, places the sewing thread path outside the sewing machine. This method is convenient for threading and maintenance. However, with the increase in the number of spools, existing sewing machines lack an effective guide mechanism, resulting in irregular thread paths outside the machine. A large number of threads can appear messy and easily become tangled and knotted. Once tangling occurs, operators often need to spend a considerable amount of time resolving it, making the operation quite cumbersome. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of existing technologies and provide an external thread routing mechanism for sewing machines.

[0005] The purpose of this utility model is achieved through the following technical solution: an external thread feeding mechanism for a sewing machine, including a sewing machine body, a base plate and a thread lifting arm are provided on the outer side of the sewing machine body, a first guide sleeve and a mounting base are provided on the base plate, a lifting column is adjustablely connected to the mounting base, the lifting column can be adjusted up and down, a second guide sleeve corresponding to the first guide sleeve is provided on the lifting column; a third guide sleeve is provided on the thread lifting arm; the sewing thread passes through the first guide sleeve, the second guide sleeve and the third guide sleeve in sequence.

[0006] Preferably, the substrate is provided with a first through hole, the mounting base is provided with a second through hole corresponding to the first through hole, and the outer side of the sewing machine body is provided with a threaded hole. The substrate is connected to the sewing machine body by a connecting screw, which passes through both the first and second through holes and is connected to the threaded hole on the outer side of the sewing machine body.

[0007] Preferably, a handle is provided on the substrate.

[0008] Preferably, the mounting base is provided with a guide hole through which the lifting column passes; the mounting base is also connected with an adjusting screw corresponding to the lifting column, which is used to tighten or loosen the lifting column.

[0009] Preferably, one end of the lifting arm is connected to a rotating shaft on the sewing machine body, and the lifting arm swings up and down through the rotating shaft; the other end of the lifting arm is provided with a wire guide sleeve frame, and the third wire guide sleeve is set on the wire guide sleeve frame; a top thread plate frame is provided below the wire guide sleeve frame, and a top thread plate corresponding to the third wire guide sleeve is provided on the top thread plate frame, and the top thread plate is correspondingly set below the third wire guide sleeve.

[0010] Preferably, one end of the thread-lifting arm is provided with a clamp, which is connected to the rotating shaft on the sewing machine body.

[0011] Preferably, a bobbin holder is provided on the outer side of the sewing machine body, and the bobbin is mounted on the bobbin holder; a front thread outlet sleeve and an upper thread outlet sleeve are provided on the bobbin holder.

[0012] The beneficial effects of this utility model are:

[0013] 1. In this utility model, a first guide sleeve, a second guide sleeve, and a third guide sleeve are provided on the outside of the sewing machine body. The sewing thread passes through the first guide sleeve, the second guide sleeve, and the third guide sleeve in sequence. The first guide sleeve, the second guide sleeve, and the third guide sleeve work together to guide and constrain the path of the sewing thread, making the path of the sewing thread more regular and significantly improving the orderliness of the thread. Even when facing multiple spools of thread, the thread can be kept clean, reducing the problem of thread tangling due to irregular thread routing.

[0014] 2. Because the sewing thread is effectively guided and constrained on its specific path, the possibility of different threads crossing or tangling with each other is reduced, lowering the risk of thread tangling and knotting during operation, thereby improving work efficiency.

[0015] 3. In this utility model, the lifting column can be adjusted up and down. By adjusting the lifting column up and down, the height position of the second guide sleeve can be adjusted, thereby adjusting the sewing thread path according to actual needs to optimize the sewing path. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model.

[0017] Figure 2 for Figure 1 Enlarged view of section A.

[0018] In the diagram: 1. Sewing machine body, 2. Bollard holder, 3. Bollard, 4. Front thread outlet sleeve, 5. Upper thread outlet sleeve, 6. Base plate, 7. Mounting base, 8. Connecting screw, 9. Adjusting screw, 10. Lifting column, 11. First guide sleeve, 12. Second guide sleeve, 13. Handle, 14. Rotary shaft, 15. Thread lifting arm, 16. Clamp, 17. Guide sleeve holder, 18. Third guide sleeve, 19. Top thread plate holder, 20. Top thread plate. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model are within the protection scope of the present utility model.

[0020] like Figures 1 to 2 As shown, an external thread feeding mechanism for a sewing machine includes a sewing machine body 1. A base plate 6 and a thread lifting arm 15 are arranged on the outer side of the sewing machine body 1. A first thread guide sleeve 11 and a mounting base 7 are arranged on the base plate 6. A lifting column 10 is adjustablely connected to the mounting base 7. The lifting column 10 can be adjusted up and down. A second thread guide sleeve 12 corresponding to the first thread guide sleeve 11 is arranged on the lifting column 10. A third thread guide sleeve 18 is arranged on the thread lifting arm 15. The sewing thread passes through the first thread guide sleeve 11, the second thread guide sleeve 12 and the third thread guide sleeve 18 in sequence.

[0021] In this invention, a first guide sleeve 11, a second guide sleeve 12, and a third guide sleeve 18 are provided on the outer side of the sewing machine body 1. The sewing thread passes through the first guide sleeve 11, the second guide sleeve 12, and the third guide sleeve 18 in sequence. The first guide sleeve 11, the second guide sleeve 12, and the third guide sleeve 18 work together to guide and constrain the path of the sewing thread, making the path more regular and significantly improving the orderliness of the thread movement. Even with multiple bobbins 3, the thread movement remains neat, reducing the problem of irregular thread tangling. Because the sewing thread is effectively guided and constrained on its specific path, the possibility of different threads crossing or tangling is reduced, lowering the risk of thread tangling and knotting during operation, thereby improving work efficiency. In this invention, the lifting column 10 can be adjusted up and down. By adjusting the height of the lifting column 10, the height position of the second guide sleeve 12 can be adjusted, thereby allowing the thread movement path to be adjusted according to actual needs to optimize the path.

[0022] The base plate 6 has a first through hole, and the mounting base 7 has a second through hole corresponding to the first through hole. The sewing machine body 1 has a threaded hole on its outer side. The base plate 6 is connected to the sewing machine body 1 by a connecting screw 8, which passes through both the first and second through holes and connects to the threaded hole on the outer side of the sewing machine body 1. The mounting base 7 is not fixedly connected to the base plate 6. The connecting screw 8 not only fixes the base plate 6 and the mounting base 7 but also adjusts their angles. To adjust the angles, first loosen the connecting screw 8, then adjust the angles to the desired state, and finally tighten the connecting screw 8. By adjusting the angles of the base plate 6 and the mounting base 7, the positions of the first guide sleeve 11 and the second guide sleeve 12 can be adjusted, thereby optimizing the sewing thread path.

[0023] A handle 13 is provided on the substrate 6. When adjusting the angle between the substrate 6 and the mounting base 7, the angle between the substrate 6 and the mounting base 7 can be adjusted by operating the handle 13 after the connecting screw 8 is loosened.

[0024] The mounting base 7 has a guide hole through which the lifting column 10 passes. The mounting base 7 also has an adjusting screw 9 corresponding to the lifting column 10, which is used to tighten or loosen the lifting column 10. The adjusting screw 9 is threaded into the mounting base 7. When adjusting the height of the lifting column 10, first loosen the adjusting screw 9 so that its tip is not connected to the lifting column 10. Then adjust the lifting column 10 to the appropriate height. After adjustment, tighten the adjusting screw 9.

[0025] Furthermore, one end of the lifting arm 15 is connected to the rotating shaft 14 on the sewing machine body 1, and the rotating shaft 14 drives the lifting arm 15 to swing up and down; the other end of the lifting arm 15 is provided with a guide sleeve frame 17, and the third guide sleeve 18 is provided on the guide sleeve frame 17; a top thread plate frame 19 is provided below the guide sleeve frame 17, and a top thread plate 20 corresponding to the third guide sleeve 18 is provided on the top thread plate frame 19. When the sewing machine is working, the rotation of the rotating shaft 14 drives the lifting arm 15 to swing up and down back and forth at a certain frequency; when the guide sleeve frame 17 on the lifting arm 15 swings downward, the upper end of the top thread plate 20 will press against the sewing thread at the third guide sleeve 18, and the pushing action of the top thread plate 20 on the sewing thread completes the pulling of the sewing thread, so that the sewing thread is released from the spool 3 a certain distance; through the up and down swinging of the lifting arm 15, the sewing thread is continuously released from the spool 3.

[0026] One end of the lifting arm 15 is provided with a clamp 16, which is connected to the rotating shaft 14 on the sewing machine body 1.

[0027] A bobbin holder 2 is provided on the outside of the sewing machine body 1, and a bobbin 3 is mounted on the bobbin holder 2; a front thread outlet sleeve 4 and an upper thread outlet sleeve 5 are provided on the bobbin holder 2. The sewing thread on the bobbin 3 can be selectively exited from either the front thread outlet sleeve 4 or the upper thread outlet sleeve 5.

[0028] This utility model is not limited to the above-described preferred embodiments. Anyone can derive other forms of products under the guidance of this utility model. However, regardless of any changes made in their shape or structure, any technical solution that is the same as or similar to this application falls within the protection scope of this utility model.

Claims

1. A sewing machine thread guiding mechanism, characterized by, The sewing machine includes a sewing machine body, a base plate and a thread lifting arm on the outside of the sewing machine body, a first guide sleeve and a mounting base on the base plate, a lifting column that is adjustable up and down on the mounting base, and a second guide sleeve corresponding to the first guide sleeve on the lifting column; a third guide sleeve is provided on the thread lifting arm; the sewing thread passes through the first guide sleeve, the second guide sleeve and the third guide sleeve in sequence.

2. A thread guide mechanism for a sewing machine according to claim 1, wherein The base plate is provided with a first through hole, the mounting base is provided with a second through hole corresponding to the first through hole, and the outer side of the sewing machine body is provided with a threaded hole. The base plate is connected to the sewing machine body by a connecting screw. The connecting screw passes through both the first and second through holes and is connected to the threaded hole on the outer side of the sewing machine body.

3. A thread guide mechanism for a sewing machine according to claim 2, wherein A handle is provided on the substrate.

4. The outfeed mechanism for a sewing machine of claim 1 wherein, The mounting base is provided with a guide hole through which the lifting column passes; the mounting base is also connected with an adjusting screw corresponding to the lifting column, which is used to tighten or loosen the lifting column.

5. The outfeed mechanism for a sewing machine of claim 1 wherein, One end of the lifting arm is connected to the rotating shaft on the sewing machine body, and the lifting arm swings up and down through the rotating shaft; the other end of the lifting arm is equipped with a wire guide sleeve frame, and the third wire guide sleeve is set on the wire guide sleeve frame; a top thread plate frame is set below the wire guide sleeve frame, and a top thread plate corresponding to the third wire guide sleeve is set on the top thread plate frame.

6. A thread guide mechanism for a sewing machine according to claim 1 wherein, One end of the lifting arm is equipped with a clamp, which is connected to the rotating shaft on the sewing machine body.

7. The outfeed mechanism for a sewing machine of claim 1 wherein, The sewing machine body is provided with a bobbin frame on the outside, and the bobbin is installed on the bobbin frame; the bobbin frame is provided with a front thread outlet sleeve and an upper thread outlet sleeve.

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