Sewing machine with thread breaking structure

Abstract

The utility model discloses a sewing machine with a thread breaking structure, comprising a sewing machine body, a fixed vertical plate is formed on the right side of the upper surface of the sewing machine body, a fixed disk with a connecting shaft is penetrated on the fixed vertical plate, an insertion rod is formed on the left side of the fixed disk, a spring is sleeved on the insertion rod, a sliding wheel sleeved on the connecting shaft is arranged on the left side of the insertion rod, a through hole corresponding to the position of the insertion rod is opened on the sliding wheel, a thread wheel is arranged on the left side of the fixed vertical plate, a rotatable upper thread shaft is formed on the left side of the thread wheel, a nut is threadedly connected to the end of the upper thread shaft, a positioning hole is opened on the thread wheel, a positioning rod is formed on the left side of the sliding wheel, the positioning rod passes through the fixed vertical plate and is inserted into the positioning hole, and a nut screwed with the head of the rotatable upper thread shaft is designed to block the installed thread roller to prevent the thread roller from falling off and enhance the stability of the thread roller.

Description

Technical Field

[0001] The utility model relates to the technical field of sewing machines, in particular to a sewing machine with a thread breaking structure. Background Art

[0002] A sewing machine is a machine that consists of a head, a base, a transmission and accessories, and is used to sew fabrics or leather products. It is characterized by high efficiency, precision, wide application and easy operation.

[0003] For example, a sewing machine with a thread breaking structure disclosed in the utility model with authorization announcement number CN220224560U includes a frame, a sewing machine body is fixed on the upper surface of the frame, a positioning shaft is rotatably mounted inside the sewing machine body through a bearing, a thread drum is fixed on the upper surface of the positioning shaft, a crank lever is rotatably mounted inside the sewing machine body through a bearing, a helical gear is fixed to one end of the crank lever and one end of the positioning shaft, two helical gears are meshed, and a plurality of positioning rods are equidistantly fixed to the upper surface of the thread drum. When the device is used, the thread roller is directly placed on the positioning rod, and the thread roller has poor stability and is easy to fall off. Utility Model Content

[0004] In order to overcome the deficiencies of the prior art, the utility model provides a sewing machine with a thread breaking structure, which blocks the installed thread roller by designing a nut screwed with the rotatable upper thread shaft head, prevents the thread roller from falling off, and enhances the stability of the thread roller.

[0005] To solve the above technical problems, the utility model provides the following technical solutions: a sewing machine with a thread breaking structure, comprising a sewing machine body, a fixed vertical plate formed on the right side of the upper surface of the sewing machine body, a fixed disk with a connecting shaft passed through the fixed vertical plate, an insertion rod formed on the left side of the fixed disk, a spring sleeved on the insertion rod, a sliding wheel sleeved on the connecting shaft is provided on the left side of the insertion rod, a through hole corresponding to the position of the insertion rod is provided on the sliding wheel, a wire wheel is provided on the left side of the fixed vertical plate, a rotatable upper wire shaft is formed on the left side of the wire wheel, a nut is threadedly connected to the end of the upper wire shaft, a positioning hole is provided on the wire wheel, a positioning rod is formed on the left side of the sliding wheel, and the positioning rod passes through the fixed vertical plate and is inserted into the positioning hole.

[0006] As a preferred technical solution of the utility model, there are four insertion rods and four springs, and there are four through holes. The insertion rod passes through the through holes and a stopper is formed at the upper end of the insertion rod.

[0007] As a preferred technical solution of the utility model, there are six upper thread shafts, six nuts and six positioning holes, and the positions of the positioning holes and the upper thread shaft correspond to each other, and there are six positioning rods.

[0008] As a preferred technical solution of the utility model, a base is provided below the sewing machine body, a mounting cavity is provided on the left front side of the base, and a mounting plate is provided in the mounting cavity.

[0009] As an optimal technical solution of the utility model, a drive motor is fixedly arranged on the right side of the mounting plate, a drive controller is connected below the drive motor, the output shaft of the drive motor passes through the mounting plate to the left, a circular knife is installed on the left end of the output shaft of the drive motor, a groove is provided on the circular knife, a fixed knife is arranged on the left side of the mounting plate, the fixed knife is an arc-shaped blade and is arranged to fit the outer side of the circular knife.

[0010] As a preferred technical solution of the utility model, a locking block with a magnetic block is provided on the left front side of the base, and a thread passing rack is provided on the upper surface of the sewing machine body, and the thread passing rack is located on the left side of the fixed vertical plate.

[0011] Compared with the prior art, the utility model can achieve the following beneficial effects:

[0012] By designing a nut that is screwed with the rotatable upper thread shaft head, the thread roller is blocked after installation to prevent it from falling off and enhance the stability of the thread roller. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0014] Figure 2 For this utility model Figure 1 A schematic diagram of the partially enlarged structure at center A;

[0015] Figure 3 For this utility model Figure 1 A schematic diagram of the partially enlarged structure at B in the middle;

[0016] Figure 4 This is a schematic diagram of the main view structure of the utility model;

[0017] Among them: 1. sewing machine body; 2. base; 3. fixed vertical plate; 4. thread wheel; 5. upper thread shaft; 6. nut; 7. fixed plate; 8. plug rod; 9. spring; 10. sliding wheel; 11. through hole; 12. positioning hole; 13. installation cavity; 14. installation plate; 15. drive motor; 16. drive controller; 17. circular knife; 18. fixed knife; 19. snap block; 20. thread rack; 21. positioning rod. DETAILED DESCRIPTION

[0018] In order to make the technical means, creative features, objectives and effects of the present invention easy to understand, the present invention is further described below in conjunction with specific embodiments, but the following embodiments are only preferred embodiments of the present invention, not all. Based on the embodiments in the implementation mode, other embodiments obtained by those skilled in the art without creative work are all within the protection scope of the present invention.

[0019] Example

[0020] Please refer to Figure 1 As shown, the utility model provides a sewing machine with a thread breaking structure, including a sewing machine body 1, a base 2 is provided below the sewing machine body 1, a mounting cavity 13 is provided on the left front side of the base 2, a mounting plate 14 is provided in the mounting cavity 13, a driving motor 15 is fixedly provided on the right side of the mounting plate 14, a driving controller 16 is connected below the driving motor 15, an output shaft of the driving motor 15 passes through the mounting plate 14 to the left, a circular knife 17 is installed on the left end of the output shaft of the driving motor 15, a groove is provided on the circular knife 17, a fixed knife 18 is provided on the left side of the mounting plate 14, the fixed knife 18 is an arc-shaped blade and is arranged to fit the outer side of the circular knife 17, a clamping block 19 with a magnetic suction block is clamped on the left front side of the base 2, a thread passing rack 20 is provided on the upper surface of the sewing machine body 1, and the thread passing rack 20 is located on the left side of the fixed vertical plate 3;

[0021] When the thread is broken, the needle drives the thread to move downward. At this time, the thread is in the groove on the side of the circular knife 17. The driving controller 16 starts the driving motor 15 to drive the circular knife 17 to rotate. The circular knife 17 is close to the fixed knife 18 to cut the thread.

[0022] like Figure 1 - Figure 4 As shown, a fixed vertical plate 3 is formed on the right side of the upper surface of the sewing machine body 1, a fixed plate 7 with a connecting shaft is penetrated on the fixed vertical plate 3, a rotatable plug rod 8 is formed on the left side of the fixed plate 7, a spring 9 is sleeved on the plug rod 8, a sliding wheel 10 sleeved on the connecting shaft is arranged on the left side of the plug rod 8, a through hole 11 corresponding to the position of the plug rod 8 is opened on the sliding wheel 10, a thread wheel 4 is arranged on the left side of the fixed vertical plate 3, a rotatable upper thread shaft 5 is formed on the left side of the thread wheel 4, and the end of the upper thread shaft 5 is provided with a bearing hidden In the wire wheel 4, the end of the upper wire spool 5 is threadedly connected with a nut 6, a positioning hole 12 is opened on the wire wheel 4, a positioning rod 21 is formed on the left side of the sliding wheel 10, the positioning rod 21 passes through the fixed vertical plate 3 and is inserted into the positioning hole 12, there are four insertion rods 8 and springs 9 respectively, there are four through holes 11, the insertion rod 8 passes through the through holes 11 and a stopper is formed at the end of the insertion rod 8 at the top, the upper wire spool 5, the nut 6 and the positioning holes 12 each have six and the positioning holes 12 and the upper wire spool 5 correspond in position, and there are six positioning rods 21;

[0023] When installing the wire roller, first remove the nut 6 from the upper wire shaft 5, put the wire roller on the upper wire shaft 5, and then screw the nut 6 and the upper wire shaft 5 together to block and fix the wire roller. When the wire roller needs to be replaced, pull the sliding wheel 10 to make it close to the fixed disk 7. At this time, the insertion rod 8 passes through the through hole 11, and the spring 9 is squeezed and contracted until the positioning rod 21 is separated from the fixed vertical plate 3, and the wire wheel 4 is turned. Make the wire roller that needs to be made is at the lower end, and then loosen the sliding wheel 10. The sliding wheel 10 slides along the connecting shaft under the push of the spring 9 and approaches the fixed vertical plate 3. The positioning rod 21 is inserted into the positioning hole 12, and the wire wheel 4 is locked. Then the wire passes through the wire frame 20 and passes in sequence.

[0024] Specific working principle:

[0025] The thread roller 4 is rotated to make the thread roller 5 as required, and the thread roller 5 is at the bottom end. Then the sliding wheel 10 is released, and the sliding wheel 10 slides along the connecting shaft and approaches the fixed vertical plate 3 under the push of the spring 9, and the positioning rod 21 is inserted into the positioning hole 12 to lock the thread roller 4, and then the thread passes through the thread frame 20 and can be inserted in sequence.

[0026] The above shows and describes the basic principle, main features and 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 preferred examples of the utility model and are not used to limit 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 of the utility model is defined by the attached claims and their equivalents.

Claims

1. A sewing machine with a thread breaking structure, comprising a sewing machine body (1), characterized in that: A fixed vertical plate (3) is formed on the right side of the upper surface of the sewing machine body (1), a fixed plate (7) with a connecting shaft is passed through the fixed vertical plate (3), an insertion rod (8) is formed on the left side of the fixed plate (7), a spring (9) is sleeved on the insertion rod (8), a sliding wheel (10) sleeved on the connecting shaft is provided on the left side of the insertion rod (8), a through hole (11) corresponding to the position of the insertion rod (8) is formed on the sliding wheel (10), a thread wheel (4) is provided on the left side of the fixed vertical plate (3), a rotatable upper thread shaft (5) is formed on the left side of the thread wheel (4), a nut (6) is threadedly connected to the end of the upper thread shaft (5), a positioning hole (12) is formed on the thread wheel (4), a positioning rod (21) is formed on the left side of the sliding wheel (10), and the positioning rod (21) passes through the fixed vertical plate (3) and is inserted into the positioning hole (12).

2. A sewing machine with a thread breaking structure according to claim 1, characterized in that: There are four insertion rods (8) and four springs (9), and there are four through holes (11). The insertion rod (8) passes through the through holes (11), and a stopper is formed at the end of the insertion rod (8) located at the top.

3. A sewing machine with a thread breaking structure according to claim 1, characterized in that: There are six upper thread shafts (5), six nuts (6) and six positioning holes (12), and the positioning holes (12) and the upper thread shaft (5) are located in corresponding positions. There are six positioning rods (21).

4. A sewing machine with a thread breaking structure according to claim 1, characterized in that: A base (2) is provided below the sewing machine body (1); a mounting cavity (13) is provided on the left front side of the base (2); and a mounting plate (14) is provided in the mounting cavity (13).

5. A sewing machine with a thread breaking structure according to claim 4, characterized in that: A drive motor (15) is fixedly arranged on the right side of the mounting plate (14), a drive controller (16) is connected below the drive motor (15), an output shaft of the drive motor (15) passes through the mounting plate (14) to the left, a circular knife (17) is installed at the left end of the output shaft of the drive motor (15), a groove is provided on the circular knife (17), a fixed knife (18) is arranged on the left side of the mounting plate (14), and the fixed knife (18) is an arc-shaped blade and is arranged to fit the outer side of the circular knife (17).

6. A sewing machine with a thread breaking structure according to claim 4, characterized in that: A locking block (19) with a magnetic block is clamped on the left front side of the base (2), and a thread passing rack (20) is arranged on the upper surface of the sewing machine body (1), wherein the thread passing rack (20) is located on the left side of the fixed vertical plate (3).

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