CN215800350U - Thread trimming protection device of sewing machine - Google Patents
Thread trimming protection device of sewing machine Download PDFInfo
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- CN215800350U CN215800350U CN202121934382.7U CN202121934382U CN215800350U CN 215800350 U CN215800350 U CN 215800350U CN 202121934382 U CN202121934382 U CN 202121934382U CN 215800350 U CN215800350 U CN 215800350U
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Abstract
The utility model belongs to the technical field of sewing machine accessories, and particularly relates to a thread trimming protection device of a sewing machine, which comprises a fixed cutter; the movable cutter piece can rotate relative to the fixed cutter piece; the fixed cutter piece and the movable cutter piece are respectively provided with a fixed cutter edge and a movable cutter edge; when the movable cutter element rotates to the fixed cutter opening and contacts with the movable cutter opening, the sewing thread on the movable cutter element is cut off; and when the movable cutter element rotates until the movable cutter edge is contacted with the protection mechanism, the movable cutter element drives the protection mechanism to move to expose the fixed cutter edge. Therefore, the protection mechanism is arranged on the front side of the fixed knife edge, so that the fixed knife edge can be blocked before the movable knife and the fixed knife are not in contact, and the sewing thread is effectively prevented from being broken due to the fact that the fixed knife edge is in contact with the sewing thread in advance. Thereby ensuring the accuracy and the stability of the thread cutting mechanism in the sewing machine and further improving the yield of finished sewing products.
Description
Technical Field
The utility model relates to the technical field of sewing machine accessories, in particular to a thread trimming protection device of a sewing machine.
Background
Most of the existing industrial sewing machines belong to general sewing machines, including flat sewing machines, chain sewing machines, quilting machines, overedgers, flat sewing machines and the like, and the flat sewing machines have the highest utilization rate. With the continuous adjustment of market and consumption structure, the industrial sewing machine with medium and low speed can not meet the production requirement, the sewing machine is developing towards high speed and seriation, and the electronic and computer technology is widely applied to the sewing machine. The internal structure of the sewing machine is complex, and comprises a presser foot lifting device, a thread trimming mechanism and the like.
However, in the thread trimming mechanism of some sewing machines, when the fixed knife is not in contact with the movable knife, the sewing thread on the movable knife may be broken directly when the sewing thread is in contact with the fixed knife because the fixed knife is too tight or the fixed knife edge is too sharp, as in the thread trimming mechanism of a sewing machine with chinese patent application No. 201510599479.X, the length of the thread end is caused to have errors, the needle is not pulled up, or the thread is removed.
Disclosure of Invention
The utility model aims to provide a thread trimming protection device of a sewing machine.
The purpose of the utility model is realized as follows:
a thread trimming protector for a sewing machine comprises
A cutter fixing piece; and
the movable cutter piece can rotate relative to the fixed cutter piece;
the fixed cutter piece and the movable cutter piece are respectively provided with a fixed cutter edge and a movable cutter edge; when the movable cutter element rotates to the fixed cutter opening and contacts with the movable cutter opening, the sewing thread on the movable cutter element is cut off;
the front side of the fixed knife edge is movably provided with a protection mechanism for blocking the fixed knife edge, and when the movable knife element rotates to the position where the movable knife edge is contacted with the protection mechanism, the movable knife element drives the protection mechanism to move to expose the fixed knife edge.
Preferably, the moving blade member includes:
a rotating part for rotating and connecting to the sewing machine;
the arc-shaped movable blade is connected with the rotating part, and the rotating part drives the movable blade to rotate;
the stationary blade member includes:
a fixing part for fixing and connecting to the sewing machine;
the arc-shaped fixed blade is connected with the fixing part and is matched with the arc-shaped movable blade;
the fixed blade opening and the movable blade opening are respectively formed on the arc-shaped fixed blade and the arc-shaped movable blade.
Preferably, the movable blade is provided with a threading hole and a thread placing groove for arranging sewing threads; the movable knife edge is arranged on the upper side of the threading hole; the thread placing groove is arranged on the lower side of the threading hole, and one end of the thread placing groove extends into the threading hole; the fixed knife edge is positioned on the outer side of the wire placing groove.
Preferably, the protection mechanism is transversely movably arranged on the fixed knife-edge, and the transverse movement direction intersects with the knife edge direction, and the intersection point is positioned at the front side of the fixed knife edge.
Preferably, one end of the protection mechanism is an elastic piece which is arranged on one side of the fixed cutter opening; the other end extends to the front side of the fixed knife edge.
Preferably, one end of the protection mechanism is arranged on one side of the fixed knife edge in a swinging mode, and the other end of the protection mechanism extends to the front side of the fixed knife edge.
Preferably, the protection mechanism is an elastic L-shaped metal sheet, and when the movable knife element rotates until the movable knife edge contacts with the protection mechanism, the movable knife element drives the L-shaped metal sheet to deform upwards to expose the knife edge.
Compared with the prior art, the utility model has the outstanding and beneficial technical effects that:
1. according to the utility model, the protection mechanism is arranged on the front side of the fixed knife edge, so that the fixed knife edge can be blocked before the movable knife and the fixed knife are not contacted, and the sewing thread is effectively prevented from being broken due to the fact that the fixed knife edge is contacted with the sewing thread in advance. Thereby ensuring the accuracy and the stability of the thread cutting mechanism in the sewing machine and further improving the yield of finished sewing products.
2. One end of the protection mechanism of the present invention may preferably be an elastic member such as a spring, elastic plastic, etc., which is disposed on one side of the fixed knife edge. The other end may preferably be a metal rod and extends to the front side of the stationary knife edge. Therefore, after the thread cutting of the fixed cutter piece and the movable cutter piece is finished, the protection mechanism can automatically recover to protect the sewing thread when the thread is cut next time.
3. When the protection mechanism is an L-shaped metal sheet, the structure is simple, and the cost is low.
4. When the protection mechanism is arranged on the fixed cutter piece in a swinging mode, the rotating structure is formed to be more stable by adopting similar hole shaft connection, and the protection mechanism is not prone to losing the effect unless broken and damaged.
Drawings
Fig. 1 is a schematic view of the overall structure of the present invention.
Fig. 2 is an exploded view of the present invention.
Reference numerals: 1. a cutter fixing piece; 2. a movable knife element; 3. a protection mechanism; 4. fixing a knife edge; 5. a movable knife edge; 6. Fixing a blade; 7. a movable blade; 8. threading holes; 9. arranging a wire groove; 10. a rotating part; 11. a fixed part; 12. A connecting end; 13. and (6) protecting the terminal.
Detailed Description
The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.
Example 1:
as shown in fig. 1 and 2, a thread trimming protection device for a sewing machine comprises a fixed cutter 1 and a movable cutter 2, wherein the fixed cutter 1 is fixedly arranged on the sewing machine, the movable cutter 2 is rotatably arranged on the sewing machine, and a part of sewing thread is also arranged on the movable cutter 2. The stationary knife element 1 and the movable knife element 2 are at least partially overlapped. The fixed cutter element 1 and the movable cutter element 2 are respectively provided with a fixed cutter edge 4 and a movable cutter edge 5, the fixed cutter edge 4 and the movable cutter edge 5 are positioned in an overlapping area of the fixed cutter element 1 and the movable cutter element 2, the movable cutter element 2 rotates relative to the fixed cutter element 1, namely the fixed cutter element 1 is fixed, the movable cutter element 2 rotates, and the fixed cutter edge 4 and the movable cutter edge 5 are in contact and separation along with the rotation of the movable cutter element 2. When the movable knife element 2 rotates until the fixed knife edge 4 contacts with the movable knife edge 5, the sewing thread on the movable knife element 2 is cut off due to the extrusion between the fixed knife edge 4 and the movable knife edge 5.
As shown in fig. 1, in the present application, a protection mechanism 3 for blocking the fixed blade 4 is movably disposed at the front side of the fixed blade 4, and when the movable blade 2 rotates until the movable blade 5 contacts the protection mechanism 3, the movable blade 2 drives the protection mechanism 3 to move, so as to expose the fixed blade 4. Then the movable knife part 2 continues to rotate, and when the fixed knife edge 4 contacts with the movable knife edge 5, the sewing thread on the movable knife part 2 can be cut off.
According to the sewing machine, the protection mechanism 3 is arranged on the front side of the fixed knife edge 4, so that the fixed knife edge 4 can be blocked before the movable knife is not in contact with the fixed knife, and the sewing thread is effectively prevented from being broken due to the fact that the fixed knife edge 4 is in contact with the sewing thread in advance. Thereby ensuring the accuracy and the stability of the thread cutting mechanism in the sewing machine and further improving the yield of finished sewing products.
Referring to fig. 1 and 2, the movable blade 2 includes a rotating portion 10 and an arc-shaped movable blade 7, the rotating portion 10 is connected to the sewing machine, and the fixed blade opening 4 is formed on the fixed blade 6, so that a driving mechanism in the sewing machine drives the rotating portion 10 to rotate, and the fixed blade 6 and the fixed blade opening 4 rotate.
With reference to fig. 1 and 2, the fixed blade 1 includes a fixing portion 11 and an arc-shaped fixed blade 6, the fixing portion 11 is used for connecting a sewing machine, the fixed blade 1 is fixed on the sewing machine, the fixed blade opening 4 is formed on the fixed blade 6, the arc-shaped fixed blade 6 is matched with the arc-shaped movable blade 7, the movable blade 7 rotates close to the inner arc surface of the fixed blade 6, and the fixed blade opening 4 and the movable blade opening 5 are located on the same tangent line of the arc surface, so that the movable blade opening 5 rotates along with the movable blade 7 to realize contact and separation with the fixed blade opening 4.
As shown in fig. 2, the movable blade 7 is further provided with a threading hole 8 and a thread placing groove 9 for arranging sewing threads; the movable knife edge 5 is arranged on the upper side of the threading hole 8; the thread placing groove 9 is arranged on the lower side of the thread passing hole 8, one end of the thread placing groove 9 extends into the thread passing hole 8, sewing threads pass through the thread passing hole 8, then are arranged in the thread placing groove 9, and finally pass through an opening at the other end of the thread placing groove 9.
Meanwhile, the sewing thread is always tightened at the lower side of the threading hole 8, so that when the fixed knife edge 4 is not contacted with the movable knife edge 5, the movable knife edge 5 is not contacted with the sewing thread all the time, and the stop knife edge 5 is prevented from cutting off the sewing thread.
As shown in fig. 1, the fixed knife edge 4 is located outside the wire placing groove 9, i.e. above the wire placing groove 9. Therefore, when the thread placing groove 9 moves along with the movable knife element 2, the fixed knife edge 4 can be always in the operating range of sewing threads.
The movement mode of the protection mechanism 3 on the fixed cutter 1 can be transverse movement, deformation, rotation, swing and the like. With reference to fig. 1 and 2, in the present embodiment, preferably, the protection mechanism 3 is transversely movably disposed on the fixed knife element 1, and the direction of the transverse movement intersects with the knife edge direction, the intersection point is located on the front side of the fixed knife edge 4, and the initial position of the protection mechanism 3 is located on the intersection point on the front side of the fixed knife edge 4. Therefore, when the fixed knife edge 4 is not contacted with the movable knife edge 5, the protection mechanism 3 blocks the fixed knife edge 4 to prevent the sewing thread from being cut off in advance. When the movable knife edge 5 contacts the protection mechanism 3, the movable knife piece 2 drives the protection mechanism 3 to move transversely, the protection mechanism 3 is no longer located in the knife edge direction of the fixed knife edge 4, the fixed knife edge 4 is exposed, and therefore the fixed knife edge 4 contacts the movable knife edge 5 again, the length of the tangent line of the sewing thread can be guaranteed to be within the set range of a producer, and the rate of finished products is finally improved.
Further, referring to fig. 1 and 2, one end of the protection mechanism 3 is a connection end 12, which may preferably be an elastic member such as a spring, elastic plastic, etc., and is disposed on one side of the fixed blade opening 4. The other end is a protective end 13, which may preferably be a metal rod, and extends to the front side of the stationary knife edge 4. Therefore, after the thread cutting of the fixed cutter element 1 and the movable cutter element 2 is finished, the protection mechanism 3 can automatically reset for protecting the sewing thread when the thread is cut next time.
Example 2:
this embodiment is substantially the same as embodiment 1, except that the protection mechanism 3 is an elastic "L" shaped metal sheet, such as a steel sheet, an iron sheet, or the like. The movable knife part 2 is contacted with the plane of the metal sheet, and when the movable knife part 2 rotates until the movable knife edge 5 is contacted with the protection mechanism 3, the movable knife part 2 drives the L-shaped metal sheet to bend upwards and deform, and the knife edge is exposed. And the metal sheet automatically recovers after the trimming is finished. Compared with the elastic piece and the rod in the embodiment 1, the elastic piece and the rod only have a single metal sheet, and are simple in structure and low in cost.
Example 3:
the embodiment is basically the same as embodiment 1, and the difference is that one end of the protection mechanism 3 is arranged at one side of the fixed knife edge 4 in a swinging manner, and a mechanism capable of realizing rotation, such as a pin shaft, a hole shaft connection and the like, can be specifically adopted. The other end extends to the front end of the fixed knife edge 4 to form a metal sheet or a metal rod, so that the movable knife element 2 can be driven conveniently. Compared with the elastic member plus the rod of embodiment 1, the elastic member may lose elasticity or the elasticity may be deteriorated, thereby affecting the use of the protection mechanism 3. The embodiment forms a rotating structure by adopting similar hole shaft connection, and is not easy to lose effect unless broken and damaged, and is more stable.
The foregoing shows and describes the general principles and broad features of the present invention and advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the utility model as claimed. The scope of the utility model is defined by the appended claims and equivalents thereof.
Claims (7)
1. A thread trimming protector for a sewing machine comprises
A fixed cutter (1); and
a movable knife element (2) which can rotate relative to the fixed knife element (1);
wherein the fixed cutter (1) and the movable cutter (2) are respectively provided with a fixed cutter edge (4) and a movable cutter edge (5); when the movable knife part (2) rotates to the fixed knife edge (4) to be contacted with the movable knife edge (5), the sewing thread on the movable knife part (2) is cut off;
it is characterized in that the preparation method is characterized in that,
the front side of the fixed knife edge (4) is movably provided with a protection mechanism (3) used for blocking the fixed knife edge (4), and when the movable knife part (2) rotates until the movable knife edge (5) is contacted with the protection mechanism (3), the movable knife part (2) drives the protection mechanism (3) to move to expose the fixed knife edge (4).
2. The thread trimming protector for sewing machine according to claim 1, wherein: the movable knife element (2) comprises:
a rotating part (10) which is used for being connected to the sewing machine in a rotating way;
the arc-shaped movable blade (7) is connected with the rotating part (10), and the rotating part (10) drives the movable blade (7) to rotate;
the stationary knife (1) comprises:
a fixing part (11) for fixing and connecting to the sewing machine;
the arc-shaped fixed blade (6) is connected with the fixing part (11) and is matched with the arc-shaped movable blade (7);
the fixed knife edge (4) and the movable knife edge (5) are respectively formed on the arc-shaped fixed blade (6) and the arc-shaped movable blade (7).
3. The thread trimming protector for sewing machine according to claim 2, wherein: the movable blade (7) is provided with a threading hole (8) for arranging sewing threads and a thread placing groove (9); the movable knife edge (5) is arranged on the upper side of the threading hole (8); the thread placing groove (9) is arranged at the lower side of the thread hole (8), and one end of the thread placing groove (9) extends into the thread hole (8); the fixed knife edge (4) is positioned on the outer side of the wire placing groove (9).
4. A thread trimming protector for a sewing machine according to any one of claims 1 to 3, wherein: the protection mechanism (3) can be transversely movably arranged on the fixed cutter piece (1), the transverse movement direction is intersected with the cutter edge direction, and the intersection point is positioned on the front side of the fixed cutter edge (4).
5. The thread trimming protector for sewing machine according to claim 4, wherein: one end of the protection mechanism (3) is an elastic part which is arranged on one side of the fixed knife edge (4); the other end extends to the front side of the fixed knife edge (4).
6. A thread trimming protector for a sewing machine according to any one of claims 1 to 3, wherein: one end of the protection mechanism (3) is arranged on one side of the fixed knife edge (4) in a swinging mode, and the other end of the protection mechanism extends to the front side of the fixed knife edge (4).
7. A thread trimming protector for a sewing machine according to any one of claims 1 to 3, wherein: the protection mechanism (3) is an elastic L-shaped metal sheet, and when the movable knife element (2) rotates until the movable knife edge (5) is contacted with the protection mechanism (3), the movable knife element (2) drives the L-shaped metal sheet to deform upwards to expose the knife edge.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121934382.7U CN215800350U (en) | 2021-08-17 | 2021-08-17 | Thread trimming protection device of sewing machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121934382.7U CN215800350U (en) | 2021-08-17 | 2021-08-17 | Thread trimming protection device of sewing machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215800350U true CN215800350U (en) | 2022-02-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121934382.7U Active CN215800350U (en) | 2021-08-17 | 2021-08-17 | Thread trimming protection device of sewing machine |
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| Country | Link |
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| CN (1) | CN215800350U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116497532A (en) * | 2023-06-28 | 2023-07-28 | 江苏长海消防装备有限公司 | Sewing machine thread cutting mechanism for processing firefighting gloves |
-
2021
- 2021-08-17 CN CN202121934382.7U patent/CN215800350U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116497532A (en) * | 2023-06-28 | 2023-07-28 | 江苏长海消防装备有限公司 | Sewing machine thread cutting mechanism for processing firefighting gloves |
| CN116497532B (en) * | 2023-06-28 | 2023-08-29 | 江苏长海消防装备有限公司 | Sewing machine thread cutting mechanism for processing firefighting gloves |
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