Thread trimming mechanism of sewing machine

Abstract

The utility model relates to the technical field of sewing machines, in particular to a thread trimming mechanism of a sewing machine, which comprises a fixing frame, a top plate is mounted on the top surface of the fixing frame, a supporting plate is mounted on the upper surface of the top plate, and a motor body is mounted on the right side surface of the supporting plate. The output end of the motor body penetrates through the interior of the supporting plate to be provided with a rotating disc, and a connecting block is installed on the back face of the rotating disc. A sewing thread can be trimmed through the blade body, after the trimming operation is finished, the motor body is closed, then the telescopic rod is started, and the abutting block is driven to move towards the back face through the telescopic rod, so that the protruding part of the sewing thread can be clamped, follow-up use of the sewing thread is facilitated, and after the whole sewing thread is stable, the motor body is closed. At the moment, the motor body is started, the connecting plate and the blade body are restored to original positions, and therefore the operation effect is good during overall thread trimming.

Description

TECHNICAL FIELD

[0001] The utility model relates to sewing machine technical field, concretely is a thread trimming mechanism of sewing machine. BACKGROUND

[0002] Sewing machine is with one or more sewing thread, on the seam material forms one or more stitches, makes one or more seam material interweaves or sews up, and the machine, sewing machine can sew cotton, hemp, silk, wool, artificial fibre and leather, plastic, paper product, and the sewing thread is neat and beautiful, flat firm, and sewing speed is fast, and easy to use.

[0003] For this, China application announcement number: CN216514551U, discloses a thread trimming mechanism of sewing machine, including: motor, fixed plate, cam, transmission rod, limit plate, thread trimming mechanism and mounting plate, fixed plate installs on the motor upper end, the fixed plate upper surface left side is equipped with the movable hole, the motor upper end is installed with cam, the cam is located in movable hole, the cam is hinged with transmission rod left end through hinging bolt, limit plate installs on the fixed plate upper surface rear side, transmission rod right side is located limit plate downside, the fixed plate right end is installed with mounting plate, compared with prior art, the utility model has the beneficial effects that: through setting motor, cam and transmission rod, it is convenient for driving thread trimming mechanism to cut sewing thread, the design of thread trimming mechanism is convenient for cutting sewing thread, and the whole mechanism structure is simple, convenient for post-maintenance, reduces maintenance cost.

[0004] But in actual use, the overall stability of the transmission rod is poor when moving, and the initial thread position cannot be limited and fixed after cutting the thread, so the overall efficiency will be slow next time, so we perfect and improve the above problems to become the problem that needs to be solved at present. UTILITY MODEL CONTENTS

[0005] The utility model aims at providing a thread trimming mechanism of sewing machine to solve the problem that the overall stability of the transmission rod is poor when moving, and the initial thread position cannot be limited and fixed after cutting the thread, so the overall efficiency will be slow next time.

[0006] To achieve the above object, the utility model provides the following technical scheme: a thread trimming mechanism of sewing machine, including fixed frame, the top surface of fixed frame is installed with top plate, the upper surface of top plate is installed with support plate, the right side surface of support plate is installed with motor body, the output end of motor body is installed with rotating disc through the inside of support plate, the back surface of rotating disc is installed with connecting block.

[0007] Preferably, the left surface of the connecting block is provided with a mounting shaft, and the outer surface of the mounting shaft is provided with a moving frame.

[0008] Preferably, the back surface of the moving frame is provided with a moving block, the back surface of the moving block is provided with a connecting plate, and the back surface of the connecting plate is provided with a blade body.

[0009] Preferably, the upper surface of the blade body is provided with an extension rod, and the back surface of the extension rod is provided with a resisting block.

[0010] Preferably, the outer surface of the moving block is provided with a limiting sleeve, and the lower end of the limiting sleeve is provided with a mounting plate.

[0011] Preferably, the top surface of the top plate is provided with a positioning plate, the top surface of the positioning plate is provided with a thread cutting frame, and the thread cutting frame is matched with the blade body and the connecting plate.

[0012] Preferably, the upper surface of the thread cutting frame is provided with a positioning frame, the front surface of the positioning frame is provided with a through slot, the inside of the positioning frame is provided with a mounting slot, the mounting slot is communicated with the through slot, and the inner side wall of the positioning frame is provided with a limiting roller.

[0013] Compared with the prior art, the sewing machine thread cutting mechanism has the following beneficial effects:

[0014] 1. The thread cutting mechanism of the sewing machine, by setting the supporting plate, motor body, rotating disc, connecting block, mounting shaft, moving frame, moving block, connecting plate, blade body, extension rod, resisting block and limiting sleeve, when cutting the thread, first start the motor body, then the motor body drives the rotating disc to rotate, then the rotating disc drives the connecting block and the mounting shaft to rotate, then the moving frame moves forward and backward, when the moving frame drives the moving block to move backward, the connecting plate and the blade body also move, then the blade body enters the inside of the thread cutting frame, at this time the blade body can cut the sewing thread, after the cutting operation is completed, the motor body is turned off, then the extension rod is started, the extension rod drives the resisting block to move backward, so that the protruding part of the sewing thread can be clamped, which is convenient for subsequent use of the sewing thread, when the whole is stable, the motor body is started to restore the connecting plate and the blade body to the original position, so that the whole thread cutting operation effect is good, and the moving block is limited by the limiting sleeve and the mounting plate when moving, which reflects the practicality of the design.

[0015] 2. The thread cutting mechanism of the sewing machine, by setting the thread cutting frame, positioning frame, through slot, mounting slot and limiting roller, when in use, the thread body can be inserted through the through slot and the mounting slot, and the thread body can be limited by the limiting roller, the limiting effect is good when the whole is used, and the thread cutting frame can be stably supported by the positioning plate, which reflects the functionality of the design. Attached Figure Description

[0016] Figure 1 This is a three-dimensional schematic diagram of the structure of this utility model;

[0017] Figure 2 This is a three-dimensional schematic diagram of the motion frame and connecting plate structure of this utility model;

[0018] Figure 3 This is a three-dimensional schematic diagram of the moving block and connecting plate structure of this utility model;

[0019] Figure 4 This is a three-dimensional schematic diagram of the positioning frame structure of this utility model.

[0020] In the diagram: 1. Fixed frame; 2. Top plate; 3. Support plate; 4. Motor body; 5. Rotating disk; 6. Connecting block; 7. Mounting shaft; 8. Moving frame; 9. Moving block; 10. Connecting plate; 11. Blade body; 12. Telescopic rod; 13. Abutment block; 14. Limiting sleeve; 15. Mounting plate; 16. Positioning plate; 17. Wire cutting frame; 18. Positioning frame; 19. Through groove; 20. Mounting groove; 21. Limiting roller. Detailed Implementation

[0021] 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. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Please see Figures 1-4 One embodiment provided by this utility model:

[0023] The utility model provides a sewing machine's thread cutting mechanism, the motor body 4, telescopic link 12, positioning frame 18 and through slot 19 used in the application are all the products that can be bought directly in the market, and the principle and connecting mode are all the prior art that the person skilled in the art is familiar with, so here is no longer tedious, including fixed frame 1, the top surface of fixed frame 1 is installed with top plate 2, the upper surface of top plate 2 is installed with support plate 3, the right side surface of support plate 3 is installed with motor body 4, the output end of motor body 4 is installed with rotary disc 5 through the inside of support plate 3, the back of rotary disc 5 is installed with connecting block 6, the left side surface of connecting block 6 is installed with mounting shaft 7, the outer surface of mounting shaft 7 is provided with motion frame 8, the back of motion frame 8 is installed with moving block 9, the back of moving block 9 is installed with connecting plate 10, the back of connecting plate 10 is installed with blade body 11, the upper surface of blade body 11 is installed with telescopic link 12, the back of telescopic link 12 is installed with resistance block 13, the outer surface of moving block 9 is installed with limiting sleeve 14, the lower end of limiting sleeve 14 is installed with mounting plate 15, the top surface of top plate 2 is installed with positioning plate 16, the top surface of positioning plate 16 is installed with thread cutting frame 17, thread cutting frame 17 and blade body 11 and connecting plate 10 are mutually adapted, the upper surface of thread cutting frame 17 is installed with positioning frame 18, the front surface of positioning frame 18 is provided with through slot 19, the inside of positioning frame 18 is provided with installation groove 20, and the through slot 19 is communicated with installation groove 20, and the inner side wall of positioning frame 18 is installed with limiting roller 21, when cutting thread, first, start motor body 4, then motor body 4 drives rotary disc 5 to rotate, then rotary disc 5 drives connecting block 6 and mounting shaft 7 to rotate, then motion frame 8 moves back and forth, when motion frame 8 drives moving block 9 to move back, connecting plate 10 and blade body 11 also move, then blade body 11 enters the inside of thread cutting frame 17, at this moment, blade body 11 can cut sewing thread, then after thread cutting operation is finished, motor body 4 is turned off, then telescopic link 12 is started, and resistance block 13 is driven by telescopic link 12 to move back, so that the protruding part of sewing thread can be clamped, which is convenient for subsequent use of sewing thread, when the whole is stable, motor body 4 is started, connecting plate 10 and blade body 11 are restored to the original position, so that the whole thread cutting operation is good, and when moving block 9 moves, limiting sleeve 14 and mounting plate 15 limit, through slot 19 and installation groove 20 can let the line body carry out the operation of insertion, and limiting roller 21 can limit the line body, the limiting effect is good when the whole is used, and positioning plate 16 can stably support thread cutting frame 17.

[0024] Working principle: when the staff uses the device, first connect the power supply of the device, so as to provide power support for the device, first start the motor body 4, then the motor body 4 will drive the rotating disc 5 to rotate, then the rotating disc 5 will drive the connecting block 6 and the mounting shaft 7 to rotate, then the movement frame 8 will move forward and backward, when the movement frame 8 drives the movement block 9 to move backward, the connecting plate 10 and the blade body 11 will also move, then the blade body 11 will enter the inside of the line cutting frame 17, at this time, the blade body 11 can cut the sewing thread, then after the cutting operation is finished, the motor body 4 is turned off, then the telescopic rod 12 is started, the telescopic rod 12 drives the abutting block 13 to move backward, so as to clamp the protruding part of the sewing thread, which is convenient for subsequent use of the sewing thread, when the whole is stable, the motor body 4 is started, the connecting plate 10 and the blade body 11 are restored to the original position, the design of the through slot 19 and the mounting groove 20 can make the line body pass through and insert, at the same time, the limiting roller 21 can limit the line body, the limiting effect is good when the whole is used, at the same time, the positioning plate 16 can stably support the line cutting frame 17, the above is all the working principle of the utility model.

[0025] The above is only a preferred embodiment of the utility model, and does not limit the utility model in any form; any ordinary technical personnel in the industry can implement the utility model according to the above description and the drawings; however, any equivalent changes, modifications and evolution of the above disclosed technical content within the scope of the technical scheme of the utility model are equivalent embodiments of the utility model; at the same time, any equivalent changes, modifications and evolution of the above embodiments according to the essential technology of the utility model are still within the protection scope of the technical scheme of the utility model.

Claims

1. A thread trimming mechanism of a sewing machine comprising a fixed frame (1) having a top plate (2) mounted on the top surface of the fixed frame (1), characterized in that: The upper surface of the top plate (2) is installed with a supporting plate (3), the right surface of the supporting plate (3) is installed with a motor body (4), the output end of the motor body (4) is installed with a rotating disc (5) penetrating through the inside of the supporting plate (3), and the back surface of the rotating disc (5) is installed with a connecting block (6).

2. A thread trimming mechanism for a sewing machine as defined in claim 1, wherein: The left surface of the connecting block (6) is installed with a mounting shaft (7), and the outer surface of the mounting shaft (7) is provided with a moving frame (8).

3. A thread trimming mechanism for a sewing machine as defined in claim 2 wherein: The back surface of the moving frame (8) is installed with a moving block (9), the back surface of the moving block (9) is installed with a connecting plate (10), and the back surface of the connecting plate (10) is installed with a blade body (11).

4. A thread trimming mechanism for a sewing machine according to claim 3, wherein: The upper surface of the blade body (11) is installed with an extension rod (12), and the back surface of the extension rod (12) is installed with a resisting block (13).

5. The thread trimming mechanism of claim 3 wherein: The outer surface of the moving block (9) is installed with a limiting sleeve (14), and the lower end of the limiting sleeve (14) is installed with a mounting plate (15).

6. The thread trimming mechanism of claim 1 wherein: The top surface of the top plate (2) is installed with a positioning plate (16), the top surface of the positioning plate (16) is installed with a line cutting frame (17), and the line cutting frame (17) is matched with the blade body (11) and the connecting plate (10).

7. A thread trimming mechanism for a sewing machine according to claim 6 wherein: The upper surface of the line cutting frame (17) is installed with a positioning frame (18), the front surface of the positioning frame (18) is provided with a through groove (19), the inside of the positioning frame (18) is provided with a mounting groove (20), the mounting groove (20) is communicated with the through groove (19), and the inner side wall of the positioning frame (18) is installed with a limiting roller (21).

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