CN210048941U - Thread breaking mechanism for sewing machine - Google Patents
Thread breaking mechanism for sewing machine Download PDFInfo
- Publication number
- CN210048941U CN210048941U CN201920671848.5U CN201920671848U CN210048941U CN 210048941 U CN210048941 U CN 210048941U CN 201920671848 U CN201920671848 U CN 201920671848U CN 210048941 U CN210048941 U CN 210048941U
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- sliding rod
- movable knife
- knife
- bottom plate
- guide rail
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Abstract
The utility model discloses a thread breaking mechanism for a sewing machine, which comprises a bottom plate, a cam transmission component, a slide bar, a guide rail, a static knife and a movable knife; the movable knife is arranged on the sliding rod, a wire breaking opening is formed between the movable knife and the fixed knife, a first elastic resetting piece is arranged between the movable knife and the sliding rod, and the first elastic resetting piece provides a pulling force back to the fixed knife for the movable knife; the guide rail is arranged on the bottom plate, the sliding rod is in sliding fit with the guide rail and is provided with an initial position and a shearing position relative to the bottom plate, the cam transmission assembly is connected with the sliding rod and drives the sliding rod to move from the initial position to the shearing position, and a second elastic resetting piece for pulling the sliding rod to the initial position is arranged between the guide rail and the sliding rod; the guide assembly is arranged on the bottom plate, and in the process that the cam transmission assembly drives the sliding rod to move from the initial displacement to the cutting position, the guide assembly is in contact with the movable knife and pushes the movable knife to the static knife. The utility model discloses make things convenient for the broken string after the sewing of sewing piece to handle, improve operating personnel's sewing efficiency.
Description
Technical Field
The utility model relates to a broken string mechanism, more specifically relate to a broken string mechanism that sewing machine was used.
Background
A sewing machine is a machine that uses one or more sewing threads to form one or more stitches in a material to be sewn, thereby interweaving or stitching one or more layers of material. The sewing machine can sew fabrics such as cotton, hemp, silk, wool, artificial fiber and the like and products such as leather, plastic, paper and the like, the sewed stitch is neat, beautiful, flat and firm, the sewing speed is high, the use is simple and convenient, and the competition is continuously intensified along with the manufacturing industry of the sewing machine. The sewing piece needs to be subjected to thread breakage treatment after being sewn, and the traditional method uses manual thread breakage, but the manual thread breakage is low in efficiency, and the high-efficiency production of enterprises is seriously influenced, so that the improvement is needed.
SUMMERY OF THE UTILITY MODEL
The utility model provides a not enough to prior art, the utility model provides a broken string mechanism that sewing machine was used makes things convenient for the broken string after the sewing to handle, improves operating personnel's sewing efficiency.
In order to achieve the above purpose, the utility model provides a following technical scheme:
a thread breaking mechanism for a sewing machine comprises a bottom plate, a cam transmission assembly, a slide bar, a guide rail, a stationary knife and a movable knife;
the movable knife is arranged on the sliding rod, a wire breaking opening is formed between the movable knife and the fixed knife, a first elastic resetting piece is arranged between the movable knife and the sliding rod, and the first elastic resetting piece provides a pulling force which is back to the fixed knife for the movable knife;
the guide rail is arranged on the bottom plate, the sliding rod is in sliding fit with the guide rail, the sliding rod is provided with an initial position and a shearing position relative to the bottom plate, the cam transmission assembly is connected with the sliding rod and drives the sliding rod to move from the initial position to the shearing position, and a second elastic resetting piece for pulling the sliding rod to the initial position is arranged between the guide rail and the sliding rod;
the bottom plate is provided with a guide assembly, and the guide assembly is in contact with the movable knife and pushes the movable knife to the stationary knife in the process that the cam transmission assembly drives the sliding rod to move from the initial displacement to the cutting position.
Preferably, the cam transmission assembly comprises a motor, a cam and a first roller; the motor is installed on the bottom plate, the cam is connected to an output shaft of the motor, the first roller is installed at the end portion of the sliding rod, and the side wall of the first roller is attached to the side wall of the cam.
Preferably, the guide assembly is a second roller installed on the bottom plate through a rotating shaft, the back surface of the movable knife is an inclined surface, and the inclined surface is in contact with the side wall of the second roller.
Preferably, the first elastic restoring piece and the second elastic restoring piece are both springs.
The utility model has the advantages that: the thread breakage processing of the sewn piece is facilitated, and the sewing efficiency of operators is improved.
Drawings
FIG. 1 is a plan view of a thread cutting mechanism for a sewing machine according to the present embodiment;
fig. 2 is another plan view of the thread cutting mechanism for the sewing machine according to the present embodiment.
Detailed Description
The thread breaking mechanism for the sewing machine of the present invention will be further described with reference to fig. 1 to 2.
A thread breaking mechanism for a sewing machine comprises a bottom plate 1, a cam transmission component, a slide bar 3, a guide rail 2, a static knife 5 and a movable knife 6;
the movable knife 6 is connected with the slide bar 3 through a hinge pin, the other end of the movable knife 6 is a free end 62, a first elastic reset piece 10 is arranged between the movable knife 6 and the slide bar 3, the first elastic reset piece 10 provides a pulling force back to the fixed knife 5 for the movable knife 6, so that the free end 62 of the movable knife 6 is pulled away from the fixed knife 5, and the wire to be cut can conveniently enter the wire cutting opening;
the guide rail 2 is arranged on the base plate 1, the slide rod 3 is in sliding fit with the guide rail 2, the slide rod 3 has an initial position and a shearing position relative to the base plate 1, the static cutter 5 is separated from the movable cutter 6 in the initial position, the movable cutter 6 is closed with the static cutter 5 in the shearing position, the cam transmission component is connected with the slide rod 3 and drives the slide rod 3 to move from the initial position to the shearing position, and a first elastic resetting piece 9 for pulling the slide rod 3 to the initial position is arranged between the guide rail 2 and the slide rod 3;
the bottom plate 1 is provided with a guide assembly, and the guide assembly is in contact with the movable knife 6 and pushes the movable knife 6 to the static knife 5 in the process that the cam transmission assembly drives the slide rod 3 to move from the initial displacement to the cutting position.
When the utility model is arranged at the position of the sewing machine corresponding to the sewing opening, when the sewing machine works, after the sewing of the sewing piece is finished, the cam transmission component drives the slide rod 3 to move, so that the slide rod 3 slides to the cutting position from the initial position, and the thread to be cut enters the thread cutting opening 8, and the thread cutting opening realizes the cutting operation of the thread from the opening state of the initial position to the closing state of the cutting position, thereby facilitating the work of the working personnel; on the other hand, the movable knife 6 can open and close the wire break 8 by rotating the free end 62, so as to cut the wire, and the wire cutting device has simple structure, convenient installation and use and good cutting effect; the guide rail 2 can obviously improve the stability of the reciprocating movement of the sliding rod 3.
The embodiment is further configured as follows: the cam transmission assembly comprises a motor 12, a cam 11 and a first roller 4; the motor 12 is installed in the bottom plate 1, the cam 11 is connected on the output shaft of the motor 12, the first idler wheel 4 is installed at the end part of the sliding rod 3, and the side wall of the first idler wheel 4 is attached to the side wall of the cam.
The embodiment is further configured as follows: the guide assembly is a second roller 7 arranged on the bottom plate 1 through a rotating shaft, the back surface of the movable blade 6 is an inclined surface 61, and the inclined surface 61 is in contact with the side wall of the second roller 7. In the process that the sliding rod 3 moves from the initial displacement to the cutting position, the inclined surface 61 is in contact with the second roller 7, and the second roller 7 is pressed against the inclined surface of the movable knife 6, so that the free end moves towards the fixed knife 5 to close the wire breaking opening 8, and the wire breaking effect is achieved.
The embodiment is further configured as follows: the first elastic restoring member 10 and the first elastic restoring member 9 are both springs. The spring has an effective elastic return effect, which in the natural state pulls the slide rod 3 back to the initial position and the free end 62 of the moving blade 6 away from the stationary blade 5.
It is above only the utility model discloses a preferred embodiment, the utility model discloses a scope of protection does not only confine above-mentioned embodiment, the all belongs to the utility model discloses a technical scheme under the thinking all belongs to the utility model discloses a scope of protection. It should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (4)
1. A thread breaking mechanism for a sewing machine is characterized in that: the device comprises a bottom plate, a cam transmission assembly, a slide rod, a guide rail, a stationary knife and a movable knife;
the movable knife is arranged on the sliding rod, a wire breaking opening is formed between the movable knife and the fixed knife, a first elastic resetting piece is arranged between the movable knife and the sliding rod, and the first elastic resetting piece provides a pulling force which is back to the fixed knife for the movable knife;
the guide rail is arranged on the bottom plate, the sliding rod is in sliding fit with the guide rail, the sliding rod is provided with an initial position and a shearing position relative to the bottom plate, the cam transmission assembly is connected with the sliding rod and drives the sliding rod to move from the initial position to the shearing position, and a second elastic resetting piece for pulling the sliding rod to the initial position is arranged between the guide rail and the sliding rod;
the bottom plate is provided with a guide assembly, and the guide assembly is in contact with the movable knife and pushes the movable knife to the stationary knife in the process that the cam transmission assembly drives the sliding rod to move from the initial displacement to the cutting position.
2. The thread cutting mechanism for a sewing machine according to claim 1, wherein: the cam transmission assembly comprises a motor, a cam and a first roller; the motor is installed on the bottom plate, the cam is connected to an output shaft of the motor, the first roller is installed at the end portion of the sliding rod, and the side wall of the first roller is attached to the side wall of the cam.
3. The thread cutting mechanism for a sewing machine according to claim 1, wherein: the guide assembly is a second roller installed on the bottom plate through a rotating shaft, the back of the movable knife is an inclined plane, and the inclined plane is in contact with the side wall of the second roller.
4. The thread cutting mechanism for a sewing machine according to claim 1, wherein: the first elastic resetting piece and the second elastic resetting piece are both springs.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920671848.5U CN210048941U (en) | 2019-05-11 | 2019-05-11 | Thread breaking mechanism for sewing machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920671848.5U CN210048941U (en) | 2019-05-11 | 2019-05-11 | Thread breaking mechanism for sewing machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210048941U true CN210048941U (en) | 2020-02-11 |
Family
ID=69395375
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920671848.5U Active CN210048941U (en) | 2019-05-11 | 2019-05-11 | Thread breaking mechanism for sewing machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210048941U (en) |
-
2019
- 2019-05-11 CN CN201920671848.5U patent/CN210048941U/en active Active
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