JP2659674B2 - Scissor circular solid contact fulcrum - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a scissor joint in which two blades rotate smoothly and a force other than a rotational force is not applied to the joint by a twisting habit of a user. It is related to a three-dimensional contact fulcrum.

[0002] Further, the present invention relates to a scissor circular three-dimensional contact fulcrum which facilitates rotation of a fastener of two blades at a joint portion of the scissors.

[0003]

2. Description of the Related Art Conventionally, scissors used in the fields of beauty and beauty are provided on a surface where two blades face each other.
Packing-like thin plate is inserted in the circular groove where the cutting edge is deeper than the gripping part, or several steel balls are embedded in either circular groove of either of the two blades, and packing is formed in both circular grooves. There is one with a thin plate interposed.

In addition, a through hole for inserting a fulcrum screw into the distal end portion is provided at the tip of a fulcrum screw for joining two blades of a conventional scissor at a joint portion, and a grip portion of one blade is provided at a base end. An arc-shaped leaf spring having a locking piece projected and locked into a locking hole provided in the base is inserted and fitted to a tip end of a fulcrum screw from a through-hole of the arc-shaped leaf spring to an outer periphery of a back surface of a fastener. A non-slipping projection is formed which meshes with the non-slip groove formed at the bottom.

[0005]

Heretofore, this type of scissors has a circular groove provided at the joint of two blades with a packing-like thin plate interposed therebetween, or one of the circular grooves has several steels. The one in which a ball is embedded and a packing-like thin plate is interposed
In each case, a force other than rotational force is applied to the packing-like thin plate due to the twisting habit of the user, etc., and the packing-like thin plate is scratched.When closing the scissors, the two blades at the blade edge part are not properly rubbed, resulting in sharpness. There were the drawbacks that it became worse and that the blades became severely worn.

Further, in the conventional arcuate leaf spring, a loosening prevention projection is formed at the end of the through hole to engage with a fastener having a nonslip groove formed on the outer periphery of the back surface to be inserted into the tip of the fulcrum screw. Since the projection is located at the center end of the arc-shaped leaf spring, a large force is required to press the projection against the elasticity of the arc-shaped leaf spring, and the slip-off groove of the fastener is rotated over the locking stopper projection. However, there was a drawback that women could not turn by hand.

According to the present invention, even if a user has a twist habit,
To provide a circular solid contact fulcrum of scissors, in which no force other than rotational force is applied to the packing thin plate, the two blades rotate smoothly, and the sharpness and wear of the blades can be prevented. With the goal.

It is another object of the present invention to provide a scissor circular solid contact fulcrum which does not require a large force to rotate the fastener and can be easily turned by hand even by a woman.

[0009]

In order to achieve the above object, the present invention provides a scissor joint having a circular groove in which a blade edge portion provided on a surface of two blades facing each other is deeper than a grip portion. A ball slightly protruding from the upper and lower surfaces of the packing-like thin plate is inserted into the plurality of through-holes penetrating through the periphery of one packing-like thin plate to be housed therein.

[0010] An annular groove is provided in the circular groove so as to fit a protruding portion of the ball from the packing-like thin plate.

Alternatively, a plurality of the same number of through holes are provided around the two packing-like thin plates housed in the circular grooves, and the packing-like thin plates are integrated by aligning the respective through-holes. A slightly protruding ball is provided by being inserted into each through hole.

[0012] An annular groove is provided in the circular groove to fit the protrusion of the ball from two packing-like thin plates.

[0013] Alternatively, a radial ridge is provided on one of the two packing thin plates accommodated in the circular groove, and the two packing thin plates are overlapped with the ridge therebetween, and the periphery of each packing thin plate is placed. A plurality of through-holes are provided in the portion at equal numbers, the packing-like thin plates are integrated by aligning the respective through-holes, and balls slightly projecting from both upper and lower surfaces thereof are inserted and provided in the respective through-holes.

An annular groove is provided in the circular groove so as to fit the protrusion of the ball from two packing-like thin plates.

In addition, a through hole for inserting a fulcrum screw into the tip of the fulcrum screw for joining the two blades of the scissors at the joint portion is provided at a base end of the fulcrum screw at the base of the gripping portion of one blade. A locking piece inserted and locked in the locking hole is inserted through the through hole of the arc-shaped leaf spring protruding, and is loosely engaged with a non-slip groove formed on the outer periphery of the back surface of the fastener inserted into the tip of the fulcrum screw. The stop projection is provided on the side of the through hole of the arcuate leaf spring.

[0016]

In the scissors 1, circular grooves 5 and 6 are provided on the opposed surfaces 2a and 3a of the two blades 2 and 3 of the joining portion 4 of the scissors 1 and have a blade edge portion deeper than the grip portion. One or two packing-like thin plates 7, in which a plurality of through holes 8a, 9a, 9b are penetrated, and balls 8, 9 such as steel balls projecting slightly from both upper and lower surfaces thereof are inserted therein. 7a and 7b, the surfaces 2a and 3a of the two blades 2 and 3 facing each other at the joint 4 are balls 8 and 9 slightly projecting from the upper and lower surfaces of the packing-like thin plates 7, 7a and 7b. When the scissors 1 are closed without causing damage to the packing-like thin plates 7, 7a, 7b even if there is a twist, etc. The blade edges of the blades are properly rubbed, resulting in poor sharpness and severe blade wear. There is no possibility to benefit.

When two packing-like thin plates 7a and 7b are interposed, a ridge is formed in a radial direction, for example, between the respective through holes 9a of the ball 9 penetrating around the one packing-like thin plate 7a. Since the other packing-like thin plates 7b are overlapped with the ridge therebetween, the two packing-like thin plates 7a,
7b, elasticity is provided between the packing-like thin plates 7a, 7b.
Is hard to be damaged, maintains sharpness for a long time, and can prevent wear of the blade.

Further, a locking stopper projection 1 of a fastener 14 having a non-slip groove 14a formed on the outer periphery of the back surface, which is inserted into the tip of a fulcrum screw 11 for joining the two blades 2 and 3 of the scissors 1 at the joint portion 4.
5 is provided on the side of the through hole 12a of the arc-shaped leaf spring 12,
Since the projection 15 is located in the middle of the arc-shaped leaf spring 12 in the direction perpendicular to the center line, a large force is not required to press the projection against the elasticity of the arc-shaped leaf spring. 15 and slip-proof groove 14a (fastener 1)
4) Even women can easily turn by hand.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is an exploded view of the scissors at the joint.
2 is a cross-sectional view taken along the line AA in FIG. 1, FIG. 3 is for one packing-like thin plate, and FIG. 4 is for two packing-like thin plates.

FIGS. 5 and 6 show two packing-like thin plates formed with radial ridges.

FIG. 7 shows the scissors assembled by fulcrum screws and fasteners, and FIGS. 8 and 9 show those of an arcuate leaf spring.
0 is for the fastener.

Reference numeral 1 denotes scissors used for hairdressing, beauty, and the like. The cutting edge direction of the scissors 2a and 2a of the joining portion 4 of the two blades 2 and 3 becomes gradually deeper than the gripping direction. The circular grooves 5 and 6 are provided, and a packing-like thin plate is interposed in the circular grooves 5 and 6.

When the scissors 1 are closed, the packing-like thin plate is interposed between the circular grooves 5 and 6 in the direction of the shallow gripping portion, so that the shallow portions of the grooves 5 and 6 expand.
The deeper cutting edges are closer to each other, and the cutting edges of the two blades 2 and 3 are properly rubbed.

Reference numeral 7 denotes a single packing-like thin plate made of stainless steel or resin, which can be inserted into the circular grooves 5 and 6.

Reference numerals 7a and 7b denote two packing-like thin plates similar to those described above, which may have the same thickness as the packing-like thin plate 7 or, for example, の of the thickness of the packing-like thin plate 7. The through holes 9a and 9b are aligned and integrated.

Reference numeral 8 denotes a ball such as a steel ball made of stainless steel.
The packing-like thin plate 7 is inserted into a plurality of through-holes 8a provided in the periphery thereof so as to slightly protrude from both upper and lower surfaces of the packing-like thin plate 7.

Numeral 9 denotes a similar ball, which is provided in the same number of through holes 9a, 9b provided on the periphery of the two integrated packing-like thin plates 7a, 7b, respectively.
7b is inserted so as to slightly protrude from the upper and lower surfaces of the packing 7b.
a, 7b may be half the thickness of the packing-like thin plate 7 and have the same diameter as the ball 8;

Numerals 5a, 6a, 5b and 6b are annular grooves provided on circular grooves 5 and 6 formed on opposing surfaces 2a and 3a of the joint 4 of the two blades 2 and 3 of the scissors 1. The protrusions of the balls 8, 9 from the upper and lower surfaces of the packing-like thin plates 7, 7a, 7b are fitted.

The through holes 8a, 9a, 9b may be provided in an appropriate number of two or more, but in the present embodiment, 14 to 16 are provided.

Numeral 10 is a radial ridge protruding from one surface of one of the two packing-like thin plates 7a, 7b, and when the other packing-like thin plate 7b and the ridge 10 are overlapped with each other, It functions as a cushion between the packing-like thin plates 7a and 7b.

Reference numeral 11 denotes a fulcrum screw, which is inserted into through holes 2b and 3b penetrating through the joint 4 between the two blades 2 and 3 of the scissors 1. The screw at the tip is rectangular. is there.

Numeral 12 denotes an arcuate leaf spring.
1 is provided with a rectangular through hole 12a into which the distal end portion is inserted, and a locking piece 12b which is inserted and locked into a locking hole 13 provided in the base of the grip portion of one blade 3 at the base end. , Through hole 12a
Is provided with a locking stopper projection 15 on one side.

Reference numeral 14 denotes a fastener, which forms a non-slip groove 14a as a wavy concave portion on the outer periphery of the back surface, and forms a through hole 1 of the arc-shaped leaf spring 12.
2a is engaged with the anti-loosening projections 15 provided on both sides to prevent the fastener from loosening.

[0035]

According to the present invention, the balls 8, 9 such as stainless steel balls project slightly from both the upper and lower surfaces of one of the packing thin plates 7 and the two packing thin plates 7a, 7b. The protruding portion to be joined into the two blades 2
Circular grooves 5 and 6 formed on opposing surfaces 2a and 3a of 3
Guides into the annular grooves 5a, 6a, 5b, 6b of
The rotation of the two blades 2 and 3 at the joint 4 is received by the balls 8 and 9, and even if the user has a twisting habit, a force other than the rotational force is applied to the packing-like thin plates 7, 7 a and 7 b. Instead, the rotation of the two blades 2 and 3 becomes smooth.

One and two packing-like thin plates 7, 7
Since no force other than rotational force is applied to any of the a and 7b, the packing-like thin plate is not damaged, so that even when the two blades 2 and 3 are closed, a good state of contact is always maintained. The blade can be cut for a long time, the blade can be prevented from being worn, and the life of the scissors can be extended.

Further, since the anti-loosening projections 15, 15 protruding on both sides of the through hole 12 a of the arc-shaped leaf spring 12 are engaged with the anti-slip grooves 14 a on the outer periphery of the back surface of the fastener 14, the anti-loosening projections 15, 15 are engaged. The elasticity of the arc-shaped leaf spring 12 is not so strong, the fastener 14 can be easily turned even by a woman by hand, and the scissors can be easily disassembled and assembled.

[Brief description of the drawings]

FIG. 1 is an exploded plan view of a scissor at a joint.

FIG. 2 is an enlarged sectional view taken along line AA of FIG.

FIG. 3 is an enlarged central longitudinal sectional view of a packing-like thin plate in which a ball is inserted.

FIG. 4 is an enlarged central longitudinal cross-sectional view of a state in which a ball is inserted into two packing-like thin plates.

FIG. 5 is a plan view of one of the packing-like thin plates formed with radial ridges.

FIG. 6 is a side view of one of the packing-like thin plates formed with radial ridges.

FIG. 7 is a plan view when scissors are assembled.

FIG. 8 is an enlarged plan view of an arcuate leaf spring.

FIG. 9 is an enlarged side view of the arcuate leaf spring.

FIG. 10 is an enlarged rear view of the fastener.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Scissors 2, 3 Blades 2a, 3a Opposing surfaces 2b, 3b Through hole 4 Joint 5, 6 Circular groove 5a, 5b, 6a, 6b Annular groove 7, 7a, 7b Packing-like thin plate 8, 9 Ball 8a , 9a, 9b through hole 10 ridge 11 fulcrum screw 12 arcuate leaf spring 12a through hole 12b locking piece 13 locking hole 14 fastener 14a non-slip groove 15 locking stopper projection

Claims (4)

(57) [Claims] 1. A pair of scissors (1) for accommodating two blades (2) and (3), which are provided in opposed surfaces (2a, 3a) of a joint (4) of blades (3), respectively, are housed in circular grooves (5), (6) each having a deeper edge than a grip. A plurality of through holes 8a are provided in the periphery of the packing-like thin plate 7, and balls 8 slightly projecting from both upper and lower surfaces of the packing-like thin plate 7 are provided by being inserted into the through holes 8a. A circular three-dimensional contact fulcrum of scissors, provided with annular grooves 5a, 6a into which projecting portions of the balls 8 from the packing-like thin plate 7 are fitted. 2. A through hole 9 of the same size is provided around the two packing-like thin plates 7a and 7b housed in the circular grooves 5 and 6, respectively.
The packing thin plates 7a and 7b are integrated by aligning the through holes 9a and 9b, and the balls 9 slightly projecting from the upper and lower surfaces thereof are inserted into the through holes 9a and 9b.
The annular grooves (5b, 6b) are provided in the circular grooves (5, 6), and the protrusions of the balls (9) from the packing-like thin plates (7a, 7b) are fitted in the circular grooves (5, 6). The circular three-dimensional contact fulcrum of the scissors. 3. A radial ridge 10 is provided on one of two packing-like thin plates 7a, 7b housed in the circular grooves 5, 6,
Two packing-like thin plates 7a, 7
b, the same number of through holes 9a and 9b each having the same size are provided around the two packing-like thin plates, and the packing-like thin plates 7a and 7b are integrated by aligning the through holes 9a and 9b. Balls 9 slightly projecting from the upper and lower surfaces are inserted into the through holes 9a and 9b, and are provided in the circular grooves 5 and 6.
2. A circular three-dimensional contact fulcrum of scissors according to claim 1, wherein annular grooves (5b, 6b) are provided in said projecting portions of said balls (9) from said packing-like thin plates (7a, 7b). 4. A through hole 12a through which the fulcrum screw 11 is inserted into the tip of the fulcrum screw 11 for joining the two blades 2 and 3 of the scissors 1 at the joint portion 4 at the tip thereof, and one end is provided at the base end. Locking piece 12 that is inserted and locked into a locking hole 13 provided in the base of the gripping portion of the blade
b is inserted through the through hole 12a of the arcuate leaf spring 12 provided with the projection, and is inserted into the tip of the fulcrum screw 11. The circular three-dimensional contact fulcrum of the scissors according to any one of claims 1 to 3, wherein the scissors are provided on the side of the through hole (12a).