Thread trimming mechanism for a sewing machine

Abstract

The utility model belongs to sewing machine thread trimming technical field especially a sewing machine thread trimming mechanism, it includes the hollow base in the inside, this mechanism still includes: vertical board, vertical board fixedly connected at the top of base, guide plate, guide plate sliding connection at the top of base, adjusting plate, adjusting plate fixedly connected at the back of guide plate, L type board, L type board sliding connection at the back of base, cutting knife, cutting knife fixedly connected at the right side of L type board, and cutting knife is cooperated with adjusting plate, in the utility model, through guiding sewing thread to pass through adjusting plate and contact plate to pass through base, simultaneously electric push rod work can guide adjusting plate to remove, adjusting plate and sewing thread carry out contact at this moment, thereby reach the effect that the sewing thread tension is adjusted, prevent sewing thread curl, influence thread trimming, and L type board can drive cutting knife synchronous removal, thereby realize the effect that the automatic thread trimming is convenient work.

Description

Technical Field

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

[0002] In the prior art, a sewing machine is a processing device that connects or fixes cut pieces by stitching. It is a machine that uses one or more sewing threads to form one or more stitches on the fabric, so that one or more layers of fabric are interwoven or sewn together.

[0003] However, the above technical solution still has the following problems because the sewing machine lacks control over the sewing thread when cutting the thread: Sewing thread is prone to curling, which affects the cutting effect. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies where sewing threads are prone to curling, affecting the thread-cutting effect, and to propose a thread-cutting mechanism for sewing machines.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A sewing machine thread-cutting mechanism includes a hollow base, and the mechanism further includes: An upright plate, which is fixedly connected to the top of the base; A guide plate, which is slidably connected to the top of the base; An adjusting plate, which is fixedly connected to the rear side of the guide plate; L-shaped plate, the L-shaped plate being slidably connected to the rear side of the base; A cutter is fixedly connected to the right side of the L-shaped plate, and the cutter cooperates with the adjusting plate; A wire-cutting mechanism includes a movable plate, a pull plate, an auxiliary plate, and a rotating plate. The movable plate is slidably connected to the top of the base, the pull plate is rotatably connected to the top of the movable plate, the auxiliary plate is slidably connected to the top of the base and located to the right of the movable plate, the top of the auxiliary plate is rotatably connected to the right side of the pull plate, and the rotating plate is rotatably connected to the bottom of the auxiliary plate, with the bottom of the rotating plate rotatably connected to the bottom of the L-shaped plate.

[0006] As a preferred embodiment of this utility model, the front side of the guide plate is an inclined surface, and a No. 1 spring is fixedly connected to the front side of the adjustment plate, with one end of the No. 1 spring fixedly connected to the front inner wall of the base.

[0007] In a preferred embodiment of this utility model, an electric actuator is fixedly connected to the top of the base, and a control board is fixedly connected to the output end of the electric actuator. The left side of the control board is slidably connected to the right side of the upright plate.

[0008] In a preferred embodiment of this utility model, a control wheel is rotatably connected to the bottom of the movable plate, and the control wheel makes active contact with the inclined surface of the guide plate.

[0009] In a preferred embodiment of this utility model, a connecting plate is rotatably connected to the front side of the control board, and the bottom of the connecting plate is rotatably connected to the front side of the movable plate.

[0010] As a preferred embodiment of this utility model, a second spring is fixedly connected to the right side of the L-shaped plate, and one end of the second spring is fixedly connected to the left side of the base.

[0011] As a preferred embodiment of this utility model, a contact plate is fixedly connected to the rear inner wall of the base, and the contact plate cooperates with the adjustment plate.

[0012] Beneficial effects: 1. The sewing thread is guided through the adjustment plate and contact plate and then through the base. At this time, the electric actuator is controlled to work. The output end of the electric actuator can pull the control plate down. As the control plate moves, it can push the connecting plate to move synchronously. When the connecting plate moves, it can push the moving plate to the left. The movement of the moving plate can drive the control wheel to contact the inclined surface of the guide plate. 2. The control wheel can control the guide plate to move backward. When the guide plate moves, it can control the adjustment plate to move. At this time, the adjustment plate can contact the sewing thread, thereby achieving the effect of adjusting the tension of the sewing thread. 3. The movable plate can be pulled to move the pull plate. At this time, the pull plate can simultaneously pull the auxiliary plate to move backward. When the auxiliary plate moves, it can simultaneously pull the rotating plate to move. At this time, the rotating plate can pull the L-shaped plate to move to the right. When the L-shaped plate moves, it can drive the cutter to move synchronously, thereby achieving the effect of automatic wire cutting and facilitating work.

[0013] In this invention: the sewing thread is guided through the adjustment plate and contact plate through the base. At the same time, the electric push rod can guide the adjustment plate to move. At this time, the adjustment plate comes into contact with the sewing thread, thereby achieving the effect of adjusting the tension of the sewing thread, preventing the sewing thread from curling and affecting the cutting. Meanwhile, the L-shaped plate can drive the cutter to move synchronously, thereby achieving the effect of automatic thread cutting and facilitating the work. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of a sewing machine thread-cutting mechanism proposed in this utility model; Figure 2 A three-dimensional side view of a thread-cutting mechanism for a sewing machine according to this utility model; Figure 3A three-dimensional view of the rear side of a thread-cutting mechanism for a sewing machine proposed in this utility model; Figure 4 This is an enlarged view of structure A of a sewing machine thread-cutting mechanism proposed in this utility model.

[0015] In the diagram: 1. Base; 2. Vertical plate; 3. Electric actuator; 4. Control board; 5. Connecting plate; 6. Moving plate; 7. Adjusting plate; 8. Spring No. 1; 9. Guide plate; 10. Pull plate; 11. Auxiliary plate; 12. Rotating plate; 13. L-shaped plate; 14. Spring No. 2; 15. Cutter. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0017] Example 1 Reference Figure 1-4 A sewing machine thread-cutting mechanism includes a hollow base 1, and the mechanism further includes: Upright plate 2 is fixedly connected to the top of base 1; Guide plate 9 is slidably connected to the top of base 1; Adjustment plate 7 is fixedly connected to the rear side of guide plate 9; L-shaped plate 13, which is slidably connected to the rear side of base 1; The cutter 15 is fixedly connected to the right side of the L-shaped plate 13, and the cutter 15 cooperates with the adjusting plate 7. The wire cutting mechanism includes a movable plate 6, a pull plate 10, an auxiliary plate 11, and a rotating plate 12. The movable plate 6 is slidably connected to the top of the base 1, the pull plate 10 is rotatably connected to the top of the movable plate 6, the auxiliary plate 11 is slidably connected to the top of the base 1 and is located to the right of the movable plate 6, the top of the auxiliary plate 11 is rotatably connected to the right side of the pull plate 10, and the rotating plate 12 is rotatably connected to the bottom of the auxiliary plate 11, and the bottom of the rotating plate 12 is rotatably connected to the bottom of the L-shaped plate 13.

[0018] With the above structure, in order to achieve the effect of controlling the movement of the adjustment plate 7, when the guide plate 9 moves, the guide plate 9 can synchronously drive the adjustment plate 7 to move, and at the same time move through the cutter 15 to achieve the effect of automatic wire cutting.

[0019] To assist the adjustment plate 7 in moving, the front side of the guide plate 9 is inclined, and a first spring 8 is fixedly connected to the front side of the adjustment plate 7. One end of the first spring 8 is fixedly connected to the inner wall of the front side of the base 1. The movement of the guide plate 9 can drive the adjustment plate 7 to move, and at the same time, the first spring 8 can assist the adjustment plate 7 to return to its original position through its own elasticity.

[0020] In order to achieve the effect of driving the control board 4 to move longitudinally, the top of the base 1 is fixedly connected to the electric push rod 3, and the output end of the electric push rod 3 is fixedly connected to the control board 4. The left side of the control board 4 is slidably connected to the right side of the upright plate 2. Moving the output end of the electric push rod 3 can pull the control board 4 to move longitudinally.

[0021] In order to achieve the effect of controlling the movement of the guide plate 9, a control wheel is rotatably connected to the bottom of the moving plate 6. The control wheel makes contact with the inclined surface of the guide plate 9. When the control wheel makes contact with the inclined surface of the guide plate 9, the control wheel controls the guide plate 9 to move backward.

[0022] In order to achieve the effect of controlling the moving plate 6 to move to the left, the front side of the control plate 4 is rotatably connected to the connecting plate 5, and the bottom of the connecting plate 5 is rotatably connected to the front side of the moving plate 6. When the control plate 4 descends, it can push the connecting plate 5 to move, thereby pushing the moving plate 6 to the left through the connecting plate 5.

[0023] In order to assist the L-shaped plate 13 in returning to its original position, a second spring 14 is fixedly connected to the right side of the L-shaped plate 13, and one end of the second spring 14 is fixedly connected to the left side of the base 1. By setting the second spring 14, the second spring 14 can assist the L-shaped plate 13 in returning to its original position.

[0024] To limit the adjustment distance of the sewing thread, a contact plate is fixedly connected to the inner rear wall of the base 1, and the contact plate cooperates with the adjustment plate 7. The cooperation between the contact plate and the adjustment plate 7 can limit the adjustment distance and ensure safety during use.

[0025] The working principle of this utility model is as follows: In actual operation, the sewing thread is guided through the adjusting plate 7 and the contact plate through the base 1. At this time, the electric push rod 3 is controlled to work. The output end of the electric push rod 3 can pull the control plate 4 down. As the control plate 4 moves, it can synchronously push the connecting plate 5 to move. When the connecting plate 5 moves, it can push the moving plate 6 to move to the left. The movement of the moving plate 6 can drive the control wheel to contact the inclined surface of the guide plate 9. At this time, the control wheel can control the guide plate 9 to move backward. When the guide plate 9 moves, it can control the guide plate 9 to move backward. The adjusting plate 7 moves, allowing it to contact the sewing thread and adjust its tension. Simultaneously, as the moving plate 6 moves, it pulls the pull plate 10, which in turn pulls the auxiliary plate 11 backward. This movement of the auxiliary plate 11 then pulls the rotating plate 12, which in turn pulls the L-shaped plate 13 to the right. As the L-shaped plate 13 moves, it drives the cutter 15 to move synchronously, achieving automatic thread cutting for easier operation.

[0026] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A thread-cutting mechanism for a sewing machine, comprising a hollow base (1), characterized in that, The agency also includes: An upright plate (2) is fixedly connected to the top of the base (1); Guide plate (9), which is slidably connected to the top of base (1); Adjustment plate (7), which is fixedly connected to the rear side of guide plate (9); L-shaped plate (13), which is slidably connected to the rear side of the base (1); The cutter (15) is fixedly connected to the right side of the L-shaped plate (13) and the cutter (15) cooperates with the adjusting plate (7); The wire cutting mechanism includes a movable plate (6), a pull plate (10), an auxiliary plate (11), and a rotating plate (12). The movable plate (6) is slidably connected to the top of the base (1). The pull plate (10) is rotatably connected to the top of the movable plate (6). The auxiliary plate (11) is slidably connected to the top of the base (1) and is located on the right side of the movable plate (6). The top of the auxiliary plate (11) is rotatably connected to the right side of the pull plate (10). The rotating plate (12) is rotatably connected to the bottom of the auxiliary plate (11) and is rotatably connected to the bottom of the L-shaped plate (13).

2. The sewing machine thread-cutting mechanism according to claim 1, characterized in that, The front side of the guide plate (9) is inclined, and the front side of the adjustment plate (7) is fixedly connected to a No. 1 spring (8), and one end of the No. 1 spring (8) is fixedly connected to the front inner wall of the base (1).

3. The sewing machine thread-cutting mechanism according to claim 1, characterized in that, The top of the base (1) is fixedly connected to an electric push rod (3), and the output end of the electric push rod (3) is fixedly connected to a control board (4). The left side of the control board (4) is slidably connected to the right side of the upright plate (2).

4. A sewing machine thread-cutting mechanism according to claim 2, characterized in that, The bottom of the movable plate (6) is rotatably connected to a control wheel, which makes active contact with the inclined surface of the guide plate (9).

5. A sewing machine thread-cutting mechanism according to claim 3, characterized in that, The control board (4) is rotatably connected to the front of the connecting plate (5), and the bottom of the connecting plate (5) is rotatably connected to the front of the moving plate (6).

6. A sewing machine thread-cutting mechanism according to claim 1, characterized in that, A second spring (14) is fixedly connected to the right side of the L-shaped plate (13), and one end of the second spring (14) is fixedly connected to the left side of the base (1).

7. A sewing machine thread-cutting mechanism according to claim 1, characterized in that, A contact plate is fixedly connected to the rear inner wall of the base (1), and the contact plate cooperates with the adjustment plate (7).

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