JPH0436792Y2 - - Google Patents

Description

[Detailed explanation of the idea] Industrial applications This invention concerns barber scissors.

Conventional technology Traditionally, barber scissors used for hair cutting, etc. have required the two blade grips to move more elastically than ordinary scissors, and the two blades have been required to be in good contact with each other. Ta. For this purpose, a spring is installed between the opposing gripping parts, or a separate leaf spring or a ring made of synthetic resin is fitted to provide elasticity to the fulcrum part of the two blades. Further, the nut attached to the fulcrum part is a conventional hexagonal nut, and the connection with the bolt is only by attaching the above-mentioned leaf spring or the like, and is a conventional threaded connection between a nut and a bolt.

Problems to be Solved by the Invention In the above-mentioned conventional technology, the spring or ring must be manufactured separately and each of them must be attached to a predetermined location, which is extremely complicated in terms of manufacturing and process of scissors formation. It was hot. In addition, due to frequent use, the bolts tend to loosen, which requires frequent adjustment by tightening the bolts with a screwdriver. This idea solved the above-mentioned drawbacks by attaching synthetic resin to the tip of the bolt hole formed in the nut to increase the elastic friction with the bolt. This improves the joint condition and prevents the bolt from rotating.

Embodiment of Means for Solving Problems Figure 1 is a front view of the barber scissors of this invention.
The above-mentioned barber scissors 1 has two opposing blade parts 2 and 3,
The gripping portions 4, 5 formed at the other ends, and the double-edged portions 2, 3 between the blade portions 2, 3 and the gripping portions 4, 5.
and a connecting portion 6 which intersects to form a fulcrum. The nut 7 shown in FIGS. 2 and 3 and the bolt 8 shown in FIG. 4 are used for the connecting portion 6. The nut conventionally used for this connection is a hexagonal nut 9 as shown in Figure 6, with a threaded hole 1 in the center for screwing the bolt.
0 was only formed through it. On the other hand, the nut 7 used in the connecting part 6 according to this invention has a mounting part 11 to the scissor body, a nut head 12, a bolt threading hole 13, and a synthetic resin fitting hole 14, as shown in FIGS. It is composed of

The mounting portion 11 is shaped to fit into a rectangular recess formed in the scissors body, and can prevent the nut 7 from rotating when mounted. A bolt threading hole 13 is formed in the center thereof, and a thread is carved on the inside like a conventional nut. A synthetic resin fitting hole 14, which is slightly larger than the bolt screwing hole 13, is formed in the nut head 12, and a synthetic resin ring 15 is fitted into the fitting hole 14. The synthetic resin ring 15 is made of a semi-hard or hard material, and has no screws carved inside it.
The diameter of the hole in the synthetic resin ring 15 is approximately the same as or slightly larger than the diameter between the protrusions of the screw in the bolt threading hole 13. Further, the depth of the fitting hole 14 is formed to be approximately the same as the thickness of the nut head 12.

The nut 7 having the above structure is fitted into the recess of the scissor body using the mounting part 11, and the bolt 8 is inserted from the opposite side.
When the bolt 8 is inserted, the bolt 8 is engaged with a thread formed in the bolt threading hole 13, and by rotating the bolt 8, the bolt 8 is pushed toward the nut head 12 side. Then, the protrusion of the thread at the tip of the bolt 8 bites into the synthetic resin ring 15 of the fitting hole 14 which is continuously formed in the threaded hole 13. The synthetic resin ring 15 is selected to be semi-rigid or hard, and is tightly fitted into the fitting hole 14, so that even when the bolt 8 is rotated, the synthetic resin ring 15 itself does not move. There is no risk of it slipping off.

Effects of the invention The barber scissors of this invention, which has the above structure, has a unique shape of the nut formed at the fulcrum part, and the threaded state of the bolt and nut is extremely good due to the friction caused by the synthetic resin. Even in areas where the frequency is extremely severe, it is possible to prevent loosening. Furthermore, since a separate washer or the like is not used, the manufacturing process is also simplified.

[Brief explanation of the drawing]

Figure 1 is a front view of the barber scissors of this invention, Figure 2 is a side sectional view of the nut used as the fulcrum of the barber scissors,
FIG. 3 is a rear view of the same nut, FIG. 4 is a side view of the bolt, FIG. 5 is an enlarged side sectional view of the fulcrum, and FIG. 6 is a front view of the conventional nut. 1... Barber scissors, 2, 3... Blade section, 4, 5... Gripping section, 6... Connecting section, 7... Nut, 8... Bolt, 9... Hexagonal nut, 10... Screw cut hole ,1
1... Mounting part, 12... Nut head, 13... Bolt screw hole, 14... Synthetic resin fitting hole, 15...
Synthetic resin ring.

Claims (1)

[Scope of utility model registration request] A concave groove is formed in the connecting part 6 formed at the intersection of the opposing blade parts 2, 3 and the grip parts 4, 5, and a bolt threading hole 13 is provided in the concave groove, so that the external shape is square. A nut head consisting of a mounting part 11, a semi-hard or hard synthetic resin ring 15 fixed to a fitting hole 14 formed continuously in the mounting part 11, and a flange formed as an outer layer of the ring 15. The mounting portion 11 of the nut 7 consisting of the portion 12 is fitted, the bolt 8 is inserted from the opposite side across the connecting portion 6 of the nut 7, and the bolt 8 is screwed into the bolt threading hole 13. The barber scissors are characterized in that the convex part of the thread at the tip of the bolt 8 bites into and is fixed to the inner surface of the synthetic resin ring 15 to form a fulcrum.