To provide scissors 10 which can cut an object to be cut easily in a stable condition by using cutting blades 27 from roots to tips thereof.
Scissors 10 are provided wherein in a curved shape of cutting blades 27, assuming that when the scissors 10 are opened, a distance between an intersection point where the left and right cutting blades 27 intersect and a rotational center is Y, a line connecting the intersection point where the left and right cutting blades 27 intersect and the rotational center is a rotation reference line B, a distance from the rotational center of the scissors 10 to fixed points A on the left and right cutting blades 27 is R (mm), an angle at which a line connecting the fixed point A on one of the cutting blades 27 and the rotational center intersects the rotation reference line B is θ (rad), and an angle which is formed by tangents touching the fixed points A on the left and right cutting blades 27 is X (rad), the shape of the cutting blades 27 is expressed by a polar equation: R=Y*exp(θ*Cot(X/2)).
JPS5965671 | [Title of the device] Scissors |
JPS59137078 | HAND CLIPPERS |
YOSHIDA NAOYA
JPS6368972U | 1988-05-09 | |||
JPS5296482A | 1977-08-13 | |||
JPS5465895A | 1979-05-26 | |||
JPH0125556Y2 | 1989-07-31 | |||
JPH0551248U | 1993-07-09 |
US4422240A | 1983-12-27 |
Hitoshi Kitamura
Tatsuo Itami