JPS6311191A - Scissors - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to improvements in scissors, particularly in the support shaft of scissors, and relates to all types of scissors such as hairdressing scissors and other scissors for cutting hair.

(Prior art) Conventional scissors simply use a male thread and a female thread for the spindle, and a small gap is formed between the two scissor blades near the spindle, and the screws are loosened and tightened. The elasticity of the scissors was used to adjust the strength of the rotation of the scissors.

(Problem to be solved by the invention) Conventional scissors were as described above, so after using them for a certain period of time, the contact part of the spindle wears out and the screw tightening loosens, so new scissors are needed. I had to retighten the screws. However, retightening the screws requires a high level of skill to adjust the tightening, which is difficult for young people and women.The present invention provides scissors that do not require retightening of the screws. With the goal.

(Means for Solving the Problems) The configuration of the present invention will be explained with reference to the drawings showing examples.

The scissors have two scissor blades 1 and 2 rotatably attached to a support shaft. The support shaft is made up of a shaft core and two cylindrical bodies 5.6, and a male thread 3 and a female thread 4 are used for the shaft core.

The cylindrical body consists of heads 9, 11 and body parts 10, 12, and has insertion holes 16, 17 bored in the axial direction. Head 9
, 11 has tapered sides 18 and 19 to match the countersinks.
is formed. In addition, in order to transmit the rotation of one cylinder to the other cylinder, half of the body 10.12 of each cylinder is divided into halves, and the contact side surfaces 14,15 that touch each other are divided into halves.
have. A square protrusion 20 is integrally formed on the head surface of one cylindrical body 5, and a dish-shaped hole 21 is bored on the head surface of the other cylindrical body 6. The shaft hole 13 bored in the body is a countersink, and the cylinders 5 and 6 are inserted into this shaft hole 13.

The upper part of the cylinder head protrudes beyond the surface of the scissor blade. Elastic members for pressing each cylinder toward the other cylinder are egg-shaped leaf springs 22 and 23. A square hole 24 and a round hole 25 are bored in the leaf spring. Leaf spring 22.23
is fixed through the round hole 25 with set screws 26 and 26 at a portion closer to the handle than the support shaft. A square protrusion 20 on the upper surface of the cylinder 5 is fitted into the square hole 24 of one of the leaf springs 22, and the cylinder 5 is pressed by the elastic force of the leaf spring 22.

The other leaf spring 23 simply presses the other cylindrical body 6 from above, and there is no coupling relationship such as fitting. Both cylinders have shaft hole 1
3, the ends of the respective body parts 10 and 12 face each other with a distance between them. Moreover, since the contact sides of both cylinders are in contact with each other, when one cylinder is rotated, the other cylinder also rotates.

The shaft core in the embodiment consists of a male thread 3 and a female thread 4,
The male thread 3 is inserted from the other cylindrical body 6 and is screwed into the female thread 4 on the opposite side. The male screw 3 has a tapered side surface 27 formed on the back surface of its head, which matches the countersunk hole 21 of the cylinder body 6.
Furthermore, a square neck portion 28 is formed adjacent thereto.

This neck portion 28 and the square hole 24 of the other leaf spring 23 fit together. In addition, the code|symbol 7 is a coil spring incorporated in the inside of the internal thread 4, and the code|symbol 8 is an elastic washer interposed between the internal thread 4 and the leaf|plate spring 22.

(Operations and Effects) The present invention has the above configuration, and since one of the cylindrical bodies 5 does not move relative to one of the scissor blades 1, the other cylindrical body 5 is in contact with the other scissor blade 14 and 15 at the contact sides 14 and 15. The cylindrical body 6 also rotates in the same manner with respect to the one scissor blade 1. Therefore, when the other scissor blade 2 is rotated, friction is generated between it and the other cylindrical body 6. The cylinder body 6 determines the strength of this frictional force.
This is a leaf spring 23 which is an elastic member that presses the. In conventional scissors, the spindle becomes loose due to wear in the friction-generating portion of the spindle, so it was necessary to tighten the screw to eliminate looseness. In the present invention, even if wear occurs due to friction between the scissors blade 2 and the cylinder 6, the cylinder 6 moves inward due to the suppressing force of the leaf spring 23 by the amount of wear, and eventually the support shaft and the scissors blade are separated. This prevents any looseness between the parts.

Even if the spindle part wears out after long-term use, there is no need to adjust it with screws.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, and FIG. 1 is a front view of the vicinity of the spindle of the scissors, FIG. 2 is a perspective view of the leaf spring, FIG. 3 is an enlarged sectional view of the vicinity of the spindle, and FIG. The figure is a perspective view of the cylinder. 1.2. ,, scissors 5,6. ,,cylindrical body 13. ,,shaft hole 14,15. ,.

Claims (1)

[Claims] In a pair of scissors in which two scissors are rotatably mounted on a spindle, the spindle consists of a shaft core and two cylinders, the cylinder consists of a head and a body, and the scissors have a hole in the scissors body. The surface of the scissor blade is inserted into the provided shaft hole with the surface of the scissors unevenly inserted, and the insertion amount of the cylinder is regulated by the head so that the ends of both cylinders do not collide in the shaft hole, and one of the cylinders is inserted into the shaft hole. The bodies of both cylinders have contact sides in order to transmit the rotation of the cylinder to the other cylinder, and each cylinder is pressed toward the other cylinder by an elastic member. The two scissors blades are connected so as not to be separated by the shaft core inserted through the insertion hole, and the cylindrical body inserted into the shaft hole of one of the scissors blades is prevented from rotating relative to that scissors blade. 1. A pair of scissors, characterized in that the scissors are fixed and are provided with a fixing means for fixing the shaft core inserted through the insertion hole of the cylindrical body so as not to rotate relative to the other scissors blade.