Blowing and sucking structure of thread trimming mechanism and sewing machine

Abstract

The utility model provides a kind of blowing and suction structure of thread trimming mechanism and sewing machine, belong to sewing equipment technical field.Thread trimming mechanism is arranged on the workbench of sewing machine, blowing and suction structure includes blowing pipe and suction pipe, blowing pipe is located in one side of thread trimming mechanism, suction pipe is located in the other side of thread trimming mechanism, the gas outlet of blowing pipe is opposite the gas inlet of suction pipe.The blowing pipe of this blowing and suction structure blows simultaneously, and suction pipe also sucks, and the thread head is cleaned by the joint action of both, with better cleaning effect.

Description

Technical Field

[0001] This utility model belongs to the field of sewing equipment technology, and relates to an air blowing and suction structure of a thread cutting mechanism and a sewing machine. Background Technology

[0002] After cutting the thread, the thread-cutting mechanism of a sewing machine will leave thread ends. These thread ends need to be cleaned using an air blowing or suction structure to prevent them from adhering to the moving or stationary blades. For example, a thread-cutting mechanism for a sewing machine is disclosed in patent document application number 201922371612.2.

[0003] In existing technologies, air blowing structures often only have an air blowing tube, and air suction structures generally only have an air suction tube, which results in a less than ideal cleaning effect. Summary of the Invention

[0004] This utility model addresses the aforementioned problems in the prior art by providing an air blowing and suction structure for a wire cutting mechanism. The technical problem this utility model aims to solve is: how to improve the cleaning effect.

[0005] The objective of this utility model can be achieved through the following technical solutions:

[0006] An air blowing and suction structure for a thread cutting mechanism, wherein the thread cutting mechanism is disposed on the worktable of a sewing machine, characterized in that the air blowing and suction structure includes an air blowing pipe and an air suction pipe, the air blowing pipe being located on one side of the thread cutting mechanism and the air suction pipe being located on the other side of the thread cutting mechanism, and the air outlet of the air blowing pipe being opposite to the air inlet of the air suction pipe.

[0007] After the wire cutting mechanism cuts the wire, it leaves a wire end. The air blowing pipe blows air towards the wire cutting mechanism and the wire end. The suction pipe generates negative pressure and sucks air in from one side of the wire cutting mechanism. The air outlet of the air blowing pipe is opposite to the air inlet of the suction pipe. The air blowing pipe and the suction pipe work together to make the airflow flow from the air blowing pipe to the suction pipe. The wire end on the wire cutting mechanism enters the suction pipe with the airflow, completing the cleaning.

[0008] The blowing tube of this air-blowing and suction structure blows air while the suction tube draws in air. The two work together to clean the thread ends, resulting in a better cleaning effect.

[0009] In the above-mentioned air blowing and air suction structure of the wire cutting mechanism, the wire cutting mechanism includes a first movable blade and a second movable blade, both of which are rotatable. The first movable blade is arc-shaped. When the first movable blade and the second movable blade are engaged, the inner end of the air blowing pipe is located on one side of the first movable blade and in the tangential direction of the first movable blade, and the inner end of the air suction pipe is located on one side of the second movable blade and in the tangential direction of the first movable blade.

[0010] The fixed blade 1 and the moving blade 2 rotate towards each other under the drive of the drive mechanism. When they mesh together, the wire cutting is completed. The inner end of the air blowing pipe refers to the part of the air blowing pipe near the moving blade 1. The air outlet is located on the inner end of the air blowing pipe. The inner end of the air suction pipe refers to the part of the air suction pipe near the moving blade 2. The air inlet is located on the inner end of the air suction pipe.

[0011] When the fixed blade 1 and the moving blade 2 are engaged, the inner end of the air blowing pipe is located in the tangential direction of the moving blade 1, and the inner end of the air suction pipe is also located in the tangential direction of the moving blade 1. The airflow blown out by the air blowing pipe can flow along the outer side of the moving blade 1, then pass through the moving blade 2, and finally enter the air suction pipe. This structure makes the airflow smoother, makes it easier to remove the thread ends, and further improves the cleaning effect.

[0012] In the above-mentioned air blowing and air suction structure of a wire cutting mechanism, the suction pipe includes a main body and an air inlet section. The air inlet section is arc-shaped, and the air outlet is located at the upper end of the air inlet section. When the first moving blade and the second moving blade are engaged, the air outlet is located above and outside the first moving blade.

[0013] The air intake section of the suction pipe is arc-shaped. When the airflow flows along the outside of the moving blade, it can naturally and smoothly enter the air intake section of the suction pipe and then enter the main body. This structure further improves the smoothness of airflow, makes it easier to remove the thread ends, and improves the cleaning effect.

[0014] In the air blowing and air suction structure of the above-mentioned wire cutting mechanism, a flow regulating valve for adjusting the flow rate is provided in the air blowing pipe.

[0015] The flow control valve can be set to adjust the flow rate of the air blowing pipe. When there are many wire ends, the flow control valve will increase the flow rate of the air blowing pipe, and when there are few wire ends, the flow control valve will decrease the flow rate of the air blowing pipe, so that the air blowing pipe can blow air according to different working conditions, which has good adaptability.

[0016] In the air blowing and suction structure of the above-mentioned wire cutting mechanism, a bracket is installed on the workbench, and the air blowing pipe is installed on the bracket.

[0017] The air blowing tube is mounted on the workbench via a bracket, making it more stable after installation.

[0018] In the air blowing and suction structure of the above-mentioned wire cutting mechanism, a second bracket is installed on the workbench, and the suction pipe is installed on the second bracket.

[0019] The suction pipe is mounted on the workbench via bracket two, which improves the stability of the installation.

[0020] This utility model also provides a sewing machine, which includes any of the above-mentioned air blowing and air suction structures.

[0021] Compared with the prior art, the advantages of this utility model are as follows:

[0022] 1. In this blowing and suction structure, the blowing tube blows air while the suction tube draws in air. The two work together to clean the thread ends, resulting in a better cleaning effect.

[0023] 2. The blowing pipe of the blowing and suction structure is equipped with a flow regulating valve, which enables the blowing pipe to blow air according to different working conditions, making it highly adaptable. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the air blowing and suction structure installed on the workbench;

[0025] Figure 2 This is a schematic diagram of the blowing and inhaling structure;

[0026] Figure 3 This is a schematic diagram of the inhalation tube.

[0027] In the diagram: 1. Wire cutting mechanism, 2. Air blowing pipe, 3. Air suction pipe, 4. Air outlet, 5. Air inlet, 6. Moving blade one, 7. Moving blade two, 8. Main body, 9. Air inlet section, 10. Support one, 11. Support two, 12. Worktable. Detailed Implementation

[0028] The following are specific embodiments of the present invention, and the technical solution of the present invention will be further described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0029] like Figure 1-3 As shown, the thread cutting mechanism 1 is set on the worktable 12 of the sewing machine. The air blowing and air suction structure includes an air blowing pipe 2 and an air suction pipe 3. The air blowing pipe 2 is located on one side of the thread cutting mechanism 1, and the air suction pipe 3 is located on the other side of the thread cutting mechanism 1. The air outlet 4 of the air blowing pipe 2 is opposite to the air inlet 5 of the air suction pipe 3.

[0030] After the wire cutting mechanism 1 cuts the wire, it leaves a wire end. The air blowing pipe 2 blows air towards the wire cutting mechanism 1 and the wire end. The suction pipe 3 generates negative pressure and sucks air from one side of the wire cutting mechanism 1. The air outlet 4 of the air blowing pipe 2 is opposite to the air inlet 5 of the suction pipe 3. The air blowing pipe 2 and the suction pipe 3 work together to make the airflow flow from the air blowing pipe 2 to the suction pipe 3. The wire end on the wire cutting mechanism 1 enters the suction pipe 3 with the airflow, completing the cleaning.

[0031] like Figure 2 As shown, in this embodiment, the wire cutting mechanism 1 includes a first movable blade 6 and a second movable blade 7, both of which are rotatable. The first movable blade 6 is arc-shaped. When the first movable blade 6 and the second movable blade 7 are engaged, the inner end of the air blowing pipe 2 is located on one side of the first movable blade 6 and in the tangential direction of the first movable blade 6, and the inner end of the air suction pipe 3 is located on one side of the second movable blade 7 and in the tangential direction of the first movable blade 6.

[0032] The fixed blade 1 and the moving blade 2 7 rotate towards each other under the drive of the drive mechanism. When they mesh together, the wire cutting is completed. The inner end of the air blowing pipe 2 refers to the part of the air blowing pipe 2 near the moving blade 1 6. The air outlet 4 is located on the inner end of the air blowing pipe 2. The inner end of the air suction pipe 3 refers to the part of the air suction pipe 3 near the moving blade 2 7. The air inlet 5 is located on the inner end of the air suction pipe 3.

[0033] When the fixed blade 1 and the moving blade 2 7 are engaged, the inner end of the air blowing pipe 2 is located in the tangential direction of the moving blade 1 6, and the inner end of the air suction pipe 3 is also located in the tangential direction of the moving blade 1 6. Since the moving blade 1 6 is equipped with a needle plate, the airflow blown out by the air blowing pipe 2 can flow along the outer side of the moving blade 1 6 due to the obstruction of the needle plate, and then pass through the moving blade 2 7 before finally entering the air suction pipe 3. This structure makes the airflow smoother, makes it easier to remove the thread ends, and further improves the cleaning effect.

[0034] like Figure 2 and 3 As shown, in this embodiment, the suction pipe 3 includes a main body 8 and an air intake section 9. The air intake section 9 is arc-shaped, and the air inlet 5 is located at the upper end of the air intake section 9. When the moving blade 1 6 and the moving blade 2 7 are engaged, the air outlet 4 is located above the outer side of the moving blade 1 6.

[0035] The air intake section 9 of the suction pipe 3 is arc-shaped. When the airflow flows along the outside of the moving blade 6, it can naturally and smoothly enter the air intake section 9 of the suction pipe 3 and then enter the main body 8. This structure further improves the smoothness of airflow, makes it easier to remove the thread ends, and improves the cleaning effect.

[0036] As one embodiment, the air blowing pipe 2 is provided with a flow regulating valve for adjusting the flow rate.

[0037] The flow regulating valve can adjust the flow rate of the air blowing pipe 2. When there are many wire ends, the flow regulating valve will increase the flow rate of the air blowing pipe 2. When there are few wire ends, the flow regulating valve will decrease the flow rate of the air blowing pipe 2, so that the air blowing pipe 2 can blow air according to different working conditions and has good adaptability.

[0038] like Figure 1 and 2 As shown, in this embodiment, a bracket 10 is installed on the workbench 12, and the air blowing pipe 2 is installed on the bracket 10. The air blowing pipe 2 is installed on the workbench 12 via the bracket 10, making the installation more stable.

[0039] like Figure 1 and 2 As shown, in this embodiment, a second bracket 11 is installed on the workbench 12, and the suction pipe 3 is installed on the second bracket 11. The suction pipe 3 is installed on the workbench 12 through the second bracket 11, which improves the stability of the installation.

[0040] This utility model also provides a sewing machine, which includes any of the above-mentioned air blowing and air suction structures.

[0041] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

Claims

1. A blowing and suction structure for a thread-cutting mechanism, wherein the thread-cutting mechanism (1) is disposed on the worktable (12) of a sewing machine, characterized in that, The blowing and suction structure includes a blowing pipe (2) and a suction pipe (3). The blowing pipe (2) is located on one side of the wire cutting mechanism (1), and the suction pipe (3) is located on the other side of the wire cutting mechanism (1). The air outlet (4) of the blowing pipe (2) is opposite to the air inlet (5) of the suction pipe (3).

2. The air blowing and suction structure of the wire cutting mechanism according to claim 1, characterized in that, The wire-cutting mechanism (1) includes a first movable blade (6) and a second movable blade (7) that are both rotatable. The first movable blade (6) is arc-shaped. When the first movable blade (6) and the second movable blade (7) are engaged, the inner end of the air blowing pipe (2) is located on one side of the first movable blade (6) and in the tangential direction of the first movable blade (6). The inner end of the air suction pipe (3) is located on one side of the second movable blade (7) and in the tangential direction of the first movable blade (6).

3. The air blowing and suction structure of the wire cutting mechanism according to claim 1, characterized in that, The air intake pipe (3) includes a main body (8) and an air intake section (9). The air intake section (9) is arc-shaped, and the air outlet (4) is located at the upper end of the air intake section (9). When the first moving blade (6) and the second moving blade (7) are engaged, the air outlet (4) is located above the outer side of the first moving blade (6).

4. The air blowing and suction structure of a wire cutting mechanism according to claim 1, 2, or 3, characterized in that, The air blowing pipe (2) is equipped with a flow regulating valve for adjusting the flow rate.

5. The air blowing and suction structure of the wire cutting mechanism according to claim 4, characterized in that, A bracket (10) is installed on the workbench (12), and the air blowing pipe (2) is installed on the bracket (10).

6. The air blowing and suction structure of the wire cutting mechanism according to claim 4, characterized in that, A second bracket (11) is installed on the workbench (12), and the suction pipe (3) is installed on the second bracket (11).

7. A sewing machine, characterized in that, The sewing machine includes an air blowing and air suction structure as described in any one of claims 1-6.

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