RU-2861619-C1 - EAGLE BEAK SCISSORS AND DEVICE FOR CUTTING SEWING THREADS FOR STITCHING END OPENING OF CIRCULAR KNITTED FABRIC

RU2861619C1RU 2861619 C1RU2861619 C1RU 2861619C1RU-2861619-C1

Abstract

FIELD: scissors technology. SUBSTANCE: eagle beak scissors include a base, a forward and reverse slider, a straight blade and an eagle beak blade. The forward and reverse slider makes a sliding connection with the base. One end of the forward and reverse slider is a drive end. The straight blade is fixed at the other end of the forward and reverse slider. The eagle beak blade is hingedly connected to the forward and reverse slider via an axial element. When a drive mechanism or manual force acts on the drive end, the forward and reverse slider performs linear sliding relative to the base. The eagle beak blade, under the action of traction force from the forward and reverse slider, is configured to rotate around the axial element, thereby closing with the straight blade to cut a target object. The invention also includes a device for cutting sewing threads for stitching an end opening of a circular knitted fabric. EFFECT: increasing the cutting efficiency of a target object. 10 cl, 7 dwg

Inventors

GAN, Tszinkhua
YAN, Chzhilin

Dates

Publication Date: 20260506
Application Date: 20251008
Priority Date: 20250120

Claims (13)

1. Eagle beak-shaped scissors, characterized in that they comprise a base, a forward and reverse slider, a straight knife, and an eagle beak-shaped knife, wherein:
the forward and reverse slider is slidingly connected with the base, one end of the forward and reverse slider is the driving end, and the straight knife is fixed to the other end of the forward and reverse slider;
wherein the knife in the form of an eagle's beak is pivotally connected to the forward and reverse slider through an axial element, when the drive mechanism or manual force is applied to the drive end, the forward and reverse slider performs a rectilinear slide relative to the base, and the knife in the form of an eagle's beak, under the action of the traction force from the forward and reverse slider, can rotate around the axial element, thereby closing with the straight knife for cutting the target object.
2. The eagle beak scissors of claim 1, wherein the straight knife has a first inclined cutting edge, the head of the eagle beak knife is hook-shaped and has a second inclined cutting edge; when the eagle beak knife is closed with the straight knife, the second inclined cutting edge interacts with the first inclined cutting edge to cut the target object.
3. Scissors in the form of an eagle's beak according to paragraph 1, characterized in that a rod is installed on the base, and a limiting groove is made on the knife in the form of an eagle's beak, wherein:
The limiting groove includes a first limiting wall and a second limiting wall located opposite each other, wherein the rod enters the limiting groove; in the initial state, the rod is pressed against the first limiting wall; when the forward and reverse slider slides, the rod acts on the second limiting wall, thereby ensuring the rotation of the eagle-beak-shaped knife into a closed state with a straight knife.
4. Scissors in the form of an eagle's beak according to paragraph 3, characterized in that the rod includes rigidly connected horizontal and vertical sections, wherein the horizontal section is secured to the base, and the vertical section enters into a limiting groove, the second limiting wall is placed between the vertical section and the base.
5. Eagle beak-shaped scissors according to paragraph 1, characterized in that a guide rod is rigidly fixed on the forward and reverse stroke slider, a guide hole is made on the base, and the guide rod enters the guide hole, and the axis of the guide rod is parallel to the longitudinal direction of the slider.
6. Eagle beak scissors according to paragraph 5, characterized in that a return spring is mounted on the guide rod with the possibility of rotation, wherein one end of the return spring is secured to the guide rod, and the other end is connected to the base; the return spring is designed to return the eagle beak knife to its original position when the action of the drive mechanism or manual force is stopped.
7. Eagle's beak-shaped scissors according to paragraph 5, characterized in that a plug is rigidly fixed to the end portion of the axial element, and a spiral spring is mounted on the axial element with the possibility of rotation, the fixed end of the spiral spring is fixed to the forward and reverse stroke slider, and the free end of the spiral spring is connected to the plug; the spiral spring is intended for the return rotation of the axial element to its original position.
8. The eagle beak-shaped scissors according to claim 1, characterized in that the eagle beak-shaped scissors additionally include a return spring plate, wherein the fixed section of the return spring plate is secured to the base, and the deformable section of the return spring plate is connected to the eagle beak-shaped knife, the return spring plate is intended for the return rotation of the eagle beak-shaped knife to its original position upon cessation of the action of the drive mechanism or manual force.
9. Eagle beak-shaped scissors according to claim 8, characterized in that the return spring plate is made in the form of an L-shaped plate.
10. A device for cutting sewing threads for sewing the end opening of a circular knitted fabric, characterized in that it includes a drive mechanism and scissors in the form of an eagle's beak according to any of paragraphs 1-9, wherein the forward and reverse slider is installed with the possibility of movement under the influence of the drive mechanism.

Description

AREA OF TECHNOLOGY The present invention relates to the field of scissors technology, in particular to eagle-beak scissors and a device for cutting sewing threads for sewing an end hole of a circular knitted fabric. LEVEL OF TECHNOLOGY The end opening of a circular knitted fabric (such as a sock) is sewn using a small curved needle bar, a large curved needle bar, and a steel needle plate, which work together to create an overlock stitch. The small curved needle bar passes through the thread guide of the large curved needle bar, then through a loop of the knitted fabric, after which the large curved needle bar passes through the thread guide of the small curved needle bar. The threads of the large and small curved needle bars interact cyclically with the steel needle plate, forming a sewing stitch. Specialized sewing scissors are used to trim each sewn circular knitted piece by trimming the excess sewing thread on the steel needle plate while maintaining the thread securely attached to the needle plate itself. In existing scissor designs, two blades move in opposite directions to capture and trim the thread. However, when the blades are brought closer together, there is a risk of the sewing thread slipping off the steel needle plate, leading to its accidental detachment during the trimming process. The applicant found that existing technical solutions have at least the following technical problems: as can be seen, the cutting method using the counter motion of two knives is prone to interference with other external structures, which complicates operation and reduces operational efficiency. ESSENCE OF THE INVENTION The present invention is directed to providing eagle beak-shaped scissors and a device for cutting sewing threads for sewing the end opening of a circular knitted fabric, which make it possible to eliminate the technical problem of existing solutions, including the tendency to interfere with external structures and the inconvenience of operation due to the counter movement of two knives when closing. To achieve this objective, the present invention provides the following technical embodiments: According to embodiments of the present invention, eagle beak scissors are provided, comprising a base, a forward and reverse slider, a straight knife and an eagle beak knife, wherein: the forward and reverse slider is slidingly connected with the base, one end of the forward and reverse slider is the driving end, and the straight knife is fixed to the other end of the forward and reverse slider; wherein the knife in the form of an eagle's beak is pivotally connected to the forward and reverse slider through an axial element, when the drive mechanism or manual force is applied to the drive end, the forward and reverse slider performs a rectilinear slide relative to the base, and the knife in the form of an eagle's beak, under the action of the traction force from the forward and reverse slider, can rotate around the axial element, thereby closing with the straight knife for cutting the target object. Preferably, the straight knife has a first inclined cutting edge, the head of the eagle-shaped knife is hook-shaped and has a second inclined cutting edge; when the eagle-shaped knife is closed with the straight knife, the second inclined cutting edge interacts with the first inclined cutting edge to cut the target object. Preferably, a rod is installed on the base, and a limiting groove is made on the knife in the form of an eagle's beak, while: the limiting groove includes a first limiting wall and a second limiting wall located opposite each other, wherein the rod enters the limiting groove; In the initial state, the rod is pressed against the first limiting wall; when the forward and reverse stroke slider slides, the rod acts on the second limiting wall, thereby ensuring the rotation of the eagle's beak-shaped knife into a closed state with a straight knife. Preferably, the rod includes rigidly connected horizontal and vertical sections, wherein the horizontal section is secured to the base, and the vertical section enters the limiting groove, the second limiting wall is placed between the vertical section and the base. Preferably, a guide rod is rigidly fixed on the forward and reverse stroke slider, a guide hole is made on the base, wherein the guide rod enters the guide hole, and the axis of the guide rod is parallel to the longitudinal direction of the slider. Preferably, a return spring is mounted rotatably on the guide rod, wherein one end of the return spring is secured to the guide rod and the other end is connected to the base; the return spring is designed to return the eagle beak-shaped knife to its original position when the action of the drive mechanism or manual force is stopped. Preferably, a plug is rigidly fixed to the end portion of the axial element, while a coil spring is mounted on the axial element with the possibility of rotation, the fixed end of the coil spring is fixed to the forward