Bird nest preventing mechanism of sewing machine
By designing an anti-bird nest mechanism on the sewing machine, and utilizing a combination of a rotating torsion bar and an adjusting block, the problem of bird nests in sewing machines is effectively solved, thus improving the performance of the sewing machine.
Patent Information
- Application Number
- CN202520599652.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-01
- Publication Date
- 2026-03-06
- Estimated Expiration
- 2035-04-01
AI Technical Summary
Existing sewing machines are prone to developing a "bird's nest" effect at the end of sewing, which affects product quality, and existing methods for dealing with this issue are not very effective.
A sewing machine anti-bird nest mechanism was designed, comprising a rotating torsion bar, a connecting block, a first adjusting block, and a second adjusting block. The sewing position is clearly illuminated by an illumination lamp, and an attraction groove is set at the front end of the second adjusting block to attract thread ends and prevent bird nesting.
It effectively avoids the "bird's nest" phenomenon, improves the sewing machine's performance, and ensures sewing quality.
Smart Images
Figure CN223974342U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of sewing machine technology, specifically relating to an anti-bird nest mechanism for sewing machines. Background Technology
[0002] A sewing machine presser foot is a component used to apply pressure to the surface of the fabric. Presser feet are categorized by sewing machine performance, such as flatbed sewing machine presser feet and overlock sewing machine presser feet, and by function, such as ordinary presser feet and special presser feet. Computerized flatbed sewing machines are now almost universally used in garment and leather goods production. When a computerized flatbed sewing machine finishes sewing, it automatically cuts the bottom thread. If the top thread remains on the presser foot surface, the next sewing process continues. During operation, the bottom thread at the beginning of the sewing will form a tangled pattern, known as a "bird's nest," which affects product quality.
[0003] Some sewing machines, when processing bird nests, use a pad to press the blade into the blade groove of the lower presser foot plate to process the sewing thread ends. The blade on the presser foot with a blade can cut the thread ends during the next sewing. However, the thread end processing effect is often poor, which affects the use of the sewing machine. Utility Model Content
[0004] This utility model provides an anti-bird nest mechanism for a sewing machine, which features that allows the light source of the illumination lamp to clearly illuminate the sewing position, and the front end of the second adjusting block has an attraction groove for attracting thread ends. When handling thread ends, the position of the second adjusting block can be pulled so that the attraction groove can attract the thread ends into the second adjusting block, thereby preventing the formation of bird nests and improving the sewing machine's performance.
[0005] This utility model provides the following technical solution: a bird nest prevention mechanism for a sewing machine, including a machine body, a presser foot on the machine body, and opposing foot assemblies on both sides of the machine body. Each opposing foot assembly includes a rotating torsion bar, a connecting block, a first adjusting block, and a second adjusting block. The rotating torsion bar is rotatably connected to the machine body. An illumination lamp is fixedly connected to the front end of the first adjusting block, and an attraction groove for attracting thread ends is opened at the front end of the second adjusting block. Both the first adjusting block and the second adjusting block are opposite to the presser foot.
[0006] The rotating torsion bar has a connecting block fixedly connected to one end, and the rotating torsion bar is V-shaped.
[0007] Two telescopic elastic bellows are fixedly connected to the connecting block, and one end of each telescopic elastic bellows is fixedly connected to the first adjusting block and the second adjusting block, respectively.
[0008] The second adjusting block is hollow inside, and a suction pipe is connected to the second adjusting block. One end of the suction pipe is connected to an external fan.
[0009] The rotating torsion bar has a fixed sleeve on its outer side, which is fixedly connected to the machine body. The fixed sleeve is threaded with a stop for restricting the movement of the rotating torsion bar.
[0010] The first and second adjusting blocks stretch the telescopic elastic bellows according to the usage position, and the two opposing leg components are symmetrically distributed.
[0011] The end faces of the first adjusting block and the second adjusting block are in contact with each other, and the suction groove is connected to the interior of the second adjusting block.
[0012] The beneficial effects of this utility model are:
[0013] The set foot assembly includes a rotating torsion bar, a connecting block, a first adjusting block, and a second adjusting block. The position of the rotating torsion bar can be adjusted so that the first and second adjusting blocks face the presser foot. An illumination lamp is fixedly connected to the front end of the first adjusting block. The position of the first adjusting block can be pulled so that the light source of the illumination lamp can clearly illuminate the sewing position. The front end of the second adjusting block has an attraction groove for attracting thread ends. When dealing with thread ends, the position of the second adjusting block can be pulled so that the attraction groove can attract the thread ends into the second adjusting block, thereby avoiding the bird's nest phenomenon and improving the sewing machine's performance.
[0014] The parts of the device not covered herein are the same as or can be implemented using existing technologies. Attached Figure Description
[0015] Figure 1 This is a schematic diagram of the structure of this utility model;
[0016] Figure 2 This is the front view of the present invention;
[0017] Figure 3 This is a schematic diagram showing the unfolded state of the rotary torsion bar in this utility model;
[0018] Figure 4 This is a schematic diagram of the structure of the adjusting block in this utility model;
[0019] In the diagram: 1. Body; 11. Presser foot; 2. Alignment foot assembly; 21. Rotating torsion bar; 22. Connecting block; 23. Telescopic elastic bellows; 24. First adjusting block; 241. Illumination lamp; 25. Second adjusting block; 251. Suction groove; 26. Fixed sleeve; 261. Stop. Detailed Implementation
[0020] Please see Figures 1-4The present invention provides the following technical solution: it includes a body 1, a presser foot 11 on the body 1, and a foot-matching assembly 2 on both sides of the body 1 opposite to the presser foot 11. The foot-matching assembly 2 includes a rotating torsion bar 21, a connecting block 22, a first adjusting block 24 and a second adjusting block 25. The rotating torsion bar 21 is rotatably connected to the body 1. An illumination lamp 241 is fixedly connected to the front end of the first adjusting block 24. An attraction groove 251 for attracting wire ends is opened at the front end of the second adjusting block 25. The first adjusting block 24 and the second adjusting block 25 are both opposite to the presser foot 11.
[0021] In this implementation scheme: The machine body 1 is equipped with a presser foot 11, which controls the production line. The position of the presser foot 11 can be adjusted via a foot-aligning assembly 2, which includes a rotating torsion bar 21, a connecting block 22, a first adjusting block 24, and a second adjusting block 25. During use, the rotating torsion bar 21 can be rotated to align the first adjusting block 24 and the second adjusting block 25 with the presser foot 11. When not in use, the rotating torsion bar 21 can be rotated further away from the first adjusting block 24 and the second adjusting block 25. A stopper 261 (which can be a bolt) can be screwed onto a fixed sleeve 26, with one end contacting the outer wall of the rotating torsion bar 21 to restrict its position, thus aligning the first adjusting block 24 and the second adjusting block 25 with the presser foot 11. An illumination lamp 241 is fixedly connected to the front end of the first adjusting block 24. The position of the first adjusting block 24 is adjusted so that the light source of the illumination lamp 241 can clearly illuminate the sewing position. The front end of the second adjusting block 25 has an attraction groove 251 for attracting thread ends. When handling thread ends, the position of the second adjusting block 25 can be adjusted so that the attraction groove 251 can attract the thread ends into the second adjusting block 25, thereby avoiding the phenomenon of bird nests and improving the use effect of the sewing machine. The first adjusting block 24 and the second adjusting block 25 are stretched and retracted according to the position of use. The two opposing foot components 2 are symmetrically distributed. Under the action of the stretching and retracting elastic corrugated tube 23, the position of the first adjusting block 24 and the second adjusting block 25 can be easily changed. By stretching or retracting the stretching and retracting elastic corrugated tube 23, the position of the first adjusting block 24 and the second adjusting block 25 can be restricted.
[0022] One end of the rotating torsion bar 21 is fixedly connected to a connecting block 22. The rotating torsion bar 21 is V-shaped. A fixed sleeve 26 is provided on the outer side of the rotating torsion bar 21. The fixed sleeve 26 is fixedly connected to the machine body 1. A stop 261 for limiting the movement of the rotating torsion bar 21 is threaded onto the fixed sleeve 26. When in use, the rotating torsion bar 21 can be rotated to make the first adjusting block 24 and the second adjusting block 25 face the presser foot 11. When not in use, the rotating torsion bar 21 can be rotated to move the first adjusting block 24 and the second adjusting block 25 away from each other. The stop 261 can be screwed on the fixed sleeve 26.
[0023] Two telescopic elastic bellows 23 are fixedly connected to the connecting block 22. One end of each telescopic elastic bellows 23 is fixedly connected to the first adjusting block 24 and the second adjusting block 25, respectively. The position of the first adjusting block 24 and the second adjusting block 25 can be easily changed by the action of the telescopic elastic bellows 23. The position of the first adjusting block 24 and the second adjusting block 25 can be restricted by stretching or retracting the telescopic elastic bellows 23.
[0024] The second adjusting block 25 is hollow inside, and a suction tube is connected to the second adjusting block 25. One end of the suction tube is connected to an external fan. The suction tube can generate suction inside the second adjusting block 25 to attract the wire end into the second adjusting block 25. A cover plate can be installed on the second adjusting block 25. The wire end can be taken out by opening the cover plate.
[0025] The end faces of the first adjusting block 24 and the second adjusting block 25 are in contact with each other, and the suction groove 251 is connected to the inside of the second adjusting block 25. The first adjusting block 24 and the second adjusting block 25 can restrict each other's positions, and one end of the first adjusting block 24 and the second adjusting block 25 are used relative to the pressure foot 11 respectively.
[0026] The working principle and usage process of this utility model are as follows: During use, the rotating torsion bar 21 can be rotated to position the first adjusting block 24 and the second adjusting block 25 facing the presser foot 11. When not in use, the rotating torsion bar 21 can be rotated further away from the first adjusting block 24 and the second adjusting block 25. The stop 261 on the fixed sleeve 26 can be screwed on so that one end contacts the restricted position on the outer wall of the rotating torsion bar 21, allowing the first adjusting block 24 and the second adjusting block 25 to face the presser foot 11. An illumination lamp 241 is fixedly connected to the front end of the first adjusting block 24. The position of the first adjusting block 24 can be pulled to ensure that the light source of the illumination lamp 241 clearly illuminates the sewing area. The second adjusting block... The front end of the segment 25 is provided with an attraction groove 251 for attracting thread ends. When handling thread ends, the position of the second adjusting block 25 can be pulled so that the attraction groove 251 can attract the thread end into the second adjusting block 25, thereby avoiding the phenomenon of bird nests and improving the sewing machine's performance. The first adjusting block 24 and the second adjusting block 25 are stretched and retracted according to the usage position of the elastic corrugated tube 23. The two opposing foot components 2 are symmetrically distributed. Due to the action of the elastic corrugated tube 23, the positions of the first adjusting block 24 and the second adjusting block 25 can be easily changed. By stretching or retracting the elastic corrugated tube 23, the positions of the first adjusting block 24 and the second adjusting block 25 can be restricted.
Claims
1. A bird's nest prevention mechanism of a sewing machine comprising a machine body (1) provided with a presser foot (11), characterized in that: The machine body (1) is provided with a pair of foot assemblies (2) opposite to the presser foot (11) on both sides, the pair of foot assemblies (2) comprise a rotary torsion bar (21), a connecting block (22), a first adjusting block (24) and a second adjusting block (25), the rotary torsion bar (21) is rotatably connected with the machine body (1), the first adjusting block (24) is fixedly connected with an irradiation lamp (241) at the front end, the second adjusting block (25) is provided with an attracting groove (251) for attracting thread at the front end, and the first adjusting block (24) and the second adjusting block (25) are opposite to the presser foot (11).
2. A nest prevention mechanism for a sewing machine as claimed in claim 1, wherein: One end of the rotary torsion bar (21) is fixedly connected with the connecting block (22), and the rotary torsion bar (21) is V-shaped.
3. A nest prevention mechanism for a sewing machine as claimed in claim 2, wherein: The connecting block (22) is fixedly connected with two telescopic elastic bellows (23), and one end of each of the two telescopic elastic bellows (23) is fixedly connected to the first adjusting block (24) and the second adjusting block (25).
4. A nest prevention mechanism for a sewing machine as defined in claim 1, wherein: The second adjusting block (25) is hollow, and the second adjusting block (25) is connected with an attracting pipe, one end of the attracting pipe is connected with an external fan.
5. A nest prevention mechanism for a sewing machine as defined in claim 1, wherein: The rotary torsion bar (21) is provided with a fixed circular sleeve (26) on the outside, the fixed circular sleeve (26) is fixedly connected with the machine body (1), and the fixed circular sleeve (26) is threadedly connected with a stopper (261) for limiting the movement of the rotary torsion bar (21).
6. A nest prevention mechanism for a sewing machine as defined in claim 3, wherein: The first adjusting block (24) and the second adjusting block (25) stretch the telescopic elastic bellows (23) according to the use position, and the two pair of foot assemblies (2) are symmetrically distributed.
7. A nest prevention mechanism for a sewing machine as defined in claim 1, wherein: The end faces of the first adjusting block (24) and the second adjusting block (25) are mutually adhered, and the attracting groove (251) is communicated with the inside of the second adjusting block (25).