WO2004082903A1

WO2004082903A1 - Scissors for haircut and method of manufacturing the same

Info

Publication number: WO2004082903A1
Application number: PCT/KR2003/000621
Authority: WO
Inventors: Pil-Young Lee
Original assignee: Pil-Young Lee
Priority date: 2003-03-17
Filing date: 2003-03-28
Publication date: 2004-09-30
Also published as: KR20040081987A; AU2003218808A1

Abstract

The present invention relate to scissors used for cutting or dressing hairs and its manufacturing method, and more particularly to scissors of which an upper member and a lower member are combined by a rotational axis, a fixing bolt, radial bearings and a thrust bearing to maintain a space between them, and radial and vertcal loads are efficiently dispersed so as to lessen a fatigue of a hand even during a long time use, and its manufacturing method. According to the above construction, present invention provides scissors for haircut in which the upper member and the lower member are combined using a rotational axis, a fixing bolt, radial bearing and a thrust bearing so that the upper member and the lower member may always maintain a regular space and efficiently disperse radial and vertical loads.

Description

SCISSORS FOR HAIRCUT AND METHOD OF MANUFACTURING T

HE M&E

TECHNICAL FIELD

The present invention relate to scissors used for cutting or dre

ssing hairs and its manufacturing method, and more particularly to

scissors of which an upper member and a lower member are combi

ned by a rotational axis, a fixing bolt, radial bearings and a thrust b

earing to maintain a space between them, and radial and vertical lo

ads are efficiently dispersed so as to lessen a fatigue of a hand even

during a long time use, and its manufacturing method.

BACKGROUND ART

Generally, scissors for haircut are classified into scissors for c

utting which is used for cutting hairs first, and scissors for hair dre

ssing which has one comb- shaped blade and is used for dressing th

e cut hairs properly.

As shown in FIG. 5, the conventional scissors for haircut has

an upper member 11 and a lower member 12, which are rotatably c

ombined each other using a rectangular bolt 13 and a circular nut 1

4. In case of dressing scissors, the upper member 11 has a comb-s

haped blade in which receiving grooves are repeatedly formed at a re gular interval so as to cut a part of hairs and receives the other hair

s. The lower member 12 has a sharp blade over all of its side end s

o as to cut hairs. ^•

The upper member 11 and the lower member 12 have insert h

oles 17 and 17' respectively, at their corresponding positions. The

rectangular bolt 14 is inserted through the insert holes 17 and 17',

and is then screwed with the circular nut 14 so that the blades of th

e upper member 11 and the lower member 12 may cut hairs with cr

ossing each other. The rectangular bolt 13 has an insert surface 1

5 of a rectangular shape at a portion on which a screw is not formed

, and the insert hole 17' of the lower member 12 has a rectangular s

hape correspondingly so that the rectangular bolt 13 rotates togethe

r with the lower member 12. Thus, a thumb is inserted into the lo

wer member 12 to fix the lower member 12 and another finger is ins

erted into the upper member 11 to rotate the upper member 11.

However, the conventional scissors for haircut constructed as

above have some problems. For example, the circular nut may be r

eleased during a long time use by a rotational force (or, a torque) dir

ectly transferred to the lower member. This makes the upper and 1

ower members spaced apart, so hairs may be not cut but interposed

between the upper and lower members, thereby giving unpleasantn

ess to a customer. If the circular nut is fastened so tight to prevent the above problem, the upper and lower members become too close

to pivot. In addition, radial and vertical loads applied during scisso

ring cannot be dispersed, thus making the hand easily fatigued duri

ng a long time use.

DISCLOSURE OF INVENTION

The present invention has been made to overcome the above p

roblems, and it is an object of the present invention to provide sciss

ors for haircut which enable agreeable efficient cutting and dressing

since an upper member and a lower member keep a regular space

between them and rotate smooth, and may disperse radial and verti

cal loads efficiently to lessen a fatigue of a user.

In accordance with one aspect of the present invention, the ab

ove and other objects can be accomplished by the provision of sciss

ors for haircut in which an upper member and a lower member is pi

votally combined, the scissors comprising: projections formed on th

e midway of insert holes of the upper member and the lower membe

r respectively; radial bearings inserted out of the projections respect

ively; a thrust bearing interposed between the projections; and a cyli

ndrical rotational axis inserted into the radial bearings and the thru

st bearing, the rotational axis having a female screw therein so as to

be combined with a fixing bolt, wherein a length of the rotational a xis inserted into the insert holes is identical to a thickness of the up

per member and the lower member when overlapped; and the rotati

onal axis and the fixing bolt are hooked just to the radial bearings.

In accordance with another aspect of the present invention, th

ere is provided a method of manufacturing scissors for haircut in w

hich an upper member and a lower member is pivotally combined, t

he method comprising the steps of: forming projections on the midw

ay of insert holes of the upper member and the lower member respe

ctively; inserting radial bearings out of the projections respectively; i

nterposing a thrust bearing between the projections; and inserting a

cylindrical rotational axis into the radial bearings and the thrust b

earing, the rotational axis having a female screw therein so as to be

combined with a fixing bolt, wherein a length of the rotational axis i

nserted into the insert holes is identical to a thickness of the upper

member and the lower member when overlapped; and the rotational

axis and the fixing bolt are hooked just to the radial bearings.

According to the above construction, present invention provid

es scissors for haircut in which the upper member and the lower me

mber are combined using a rotational axis, a fixing bolt, radial beari

ngs and a thrust bearing so that the upper member and the lower m

ember may always maintain a regular space and efficiently disperse

radial and vertical loads. BRIEF DESCRIPTION OF THE DRAWINGS

These and other features, aspects, and advantages of preferre

d embodiments of the present invention will be more fully described

in the following detailed description, taken accompanying drawings.

In the drawings:

FIG. 1A is a perspective view showing scissors for cutting acco

rding to an embodiment of the present invention;

FIG. IB is a perspective view showing scissors for hair dressin

g according to another embodiment of the present invention;

FIG. 2 is a sectional view taken along the A- A line of scissors f

or haircut according to the present invention;

FIG. 3A is a sectional view showing configuration of radial bea

rings; FIG. 3B is a sectional view showing configuration of a thrust

bearing;

FIG. 4 is an exploded view showing the scissors for haircut ac

cording to the present invention; and

FIG. 5 is an exploded view showing scissors according to the

prior art.

BEST MODES FOR CARRYING OUT THE INVENTION Hereinafter, preferred embodiments of the present invention w

ill be described in detail with reference to the accompanying drawin

gs.

As shown in FIGs. 1A to 4, scissors for haircut according to th

e present invention include an upper member 1 and a lower membe

r 2. Radial bearings 5a and 5a' and a thrust bearing 5b are inserte

d into insert holes 7 and 7' respectively, and the upper member 1 a

nd the lower member 2 are combined by a rotational axis 3 and a fix

ing bolt 4 so that the upper and lower members 1 and 2 are pivotabl

e each other. Among the figures, FIG. 1A shows an embodiment in

which the present invention is applied to cutting scissors used for c

utting hairs, and FIG. IB shows an embodiment in which the prese

nt invention is applied to dressing scissors used for dressing hairs.

The upper member 1 has the insert hole 7 at its midway. A p

rojection 8 is formed on the center portion of the inner circumferenc

e of the insert hole 7. In case of dressing scissors, receiving groove

s 6 are formed in one side of the upper member 1 at a regular interv

al to have a comb shape.

The lower member 2 has a sharp blade at all of one side. The

lower member 2 also has the insert hole 7' at a position correspond

ing to the insert hole 7 of the upper member 1. At a center portion

of the inner circumference of the insert hole 7', a projection 8' is for med.

The radial bearings 5a and 5a' and the thrust bearing 5b are i

nserted into the insert holes 7 and 7' formed in the upper and lower

members 1 and 2 respectively so as to be supported by the projecti

ons 8 and 8'. The radial bearings 5a and 5a' are entirely inserted i

nto the upper and lower members 1 and 2, not to protrude outside.

There is inserted one radial bearing 5a or 5a' into an outer surface

of the scissors for haircut, i.e. outer surface of the projection 8 or 8'.

There is also interposed one thrust bearing 5b between the upper

member 1 and the lower member 2, i.e. between the projections 8 a

nd 8\

As shown in FIGs. 3A and 4, in the radial bearing 5a or 5a', a

ball (a) is interposed between two circular cylindrical plate. Since t

he ball (a) has a diameter smaller than the thickness of the bearing,

the ball (a) is entirely buried in the bearing. Thus, the radial beari

ng 5a or 5a' may rotate with supporting a radial load. On the while

, as shown in FIGs. 3B and 4, the thrust bearing 5b has a ball (a) in

terposed in one circular flat plate. This ball (a) has a diameter larg

er than the thickness of the bearing, so the ball (a) is protruded out

side. Thus, the ball (a) may rotate with supporting a vertical load.

Therefore, owing to synthetic action of the radial bearings 5a and 5

a' and the thrust bearing 5b, radial and vertical forces may be efficie ntly dispersed, and the user may use the scissors more smoothly.

The rotational axis 3 is inserted through the insert holes 7 an

d 7' of the upper arid lower members 1 and 2, in which the radial be

arings 5a and 5a' and the thrust bearing 5b are inserted. An upper

end of the rotational axis 3 has a shape similar to a common bolt s

o that it may be hooked only to the radial bearing 5a of the upper m

ember 1. A circumference of the rotational axis 3 is circular perfect

ly fitted with an inner surface of the radial bearings 5a and 5a' and

the thrust bearing 5b. The length of the rotational axis 3 inserted i

nto the insert holes 7 and 7' of the upper and lower members 1 and

2 is equal to the thickness of the upper member 1 and the lower me

mber 2 when overlapped. The rotational axis 3 also has a female s

crew therein for combination with the fixing bolt 4. The fixing bolt

4 is combined to the female screw formed in the rotational axis 3, a

nd hooked just to the radial bearing 5a' of the lower member 2.

The scissors of the present invention are operated as follows.

As shown in FIG. 2, since the length of the rotational axis 3 in

serted into the insert holes 7 and 7' of the upper and lower member

s 1 and 2 is equal to the thickness of the upper member 1 and the 1

ower member 2 when overlapped, and since the rotational axis 3 an

d the fixing bolt 4 are hooked just to the radial bearings 5a and 5a'

respectively, a rotational force (or, a torque) of the upper and lower members 1 and 2 is transferred just to the radial bearings 5a and 5

a' and the thrust bearing 5b, not directly to the rotational axis 3 an

d the fixing bolt 4. ^• Thus, though the rotational axis 3 and the fixin

g bolt 4 are fastened tightly or used for a long time, the upper memb

er 1 and the lower member 2 are not pressed or released each other

since the rotation of the rotational axis 3 and the fixing bolt 4 is rest

ricted. Thus, the upper member 1 and the lower member 2 may cu

t or dress hairs with always keeping a regular space between them.

In addition, the upper member 1 and the lower member 2 may effic

iently disperse radial and vertical loads and minimizes a friction bet

ween them by using the radial bearings 5a and 5a' and the thrust b

earing 5b so that the upper member 1 and the lower member 2 may

freely rotate. Therefore, if a user rotates the rotational axis 3 and

the fixing bolt 4 by the hand, a frictional force is reduced so that the

upper and lower members 2 may rotate. This ensures smooth piv

ot movement of the scissors.

INDUSTRIAL APPLICABILITY

As described above, the scissors for haircut according to the p

resent invention always keep a regular space between the upper me

mber and the lower member, thereby preventing that the upper me

mber and the lower member are released due to a long time use to make hairs be interposed between the upper and lower members.

Thus, the scissors for haircut of the present invention enable a user

to cut or dress hairs efficiently and agreeably. In addition, though

the rotational axis and the fixing bolt are fastened tightly, the uppe

r and lower members keep a regular space between them, thereby e

nsuring free and smooth pivoting movement. Moreover, since two

kinds of bearings (i.e., the radial bearings and the thrust bearing) in

serted into the upper and lower members disperse radial and vertica

1 loads effectively, a friction between the members is minimized toge

ther with lessening a fatigue of a user even in a long time use.

Claims

What is claimed is;

1. Scissors for haircut in which an upper member and a lower

member is pivo tally combined, the scissors comprising:

projections (8 and S⁵) formed on the midway of insert holes (7

and 7) of the upper member (1) and the lower member (2) respective

ly; radial bearings (5a and δa^ inserted outer surface of the proje

ctions (8 and δ') respectively;

a thrust bearing (5b) interposed between the projections (8 an

d 8); and

a cylindrical rotational axis (3) inserted into the radial bearing

s (5a and δa^ and the thrust bearing (5b), the rotational axis (3) hav

ing a female screw therein so as to be combined with a fixing bolt (4)

, wherein a length of the rotational axis (3) inserted into the ins

ert holes (7 and 7^ is identical to a thickness of the upper member (

1) and the lower member (2) when overlapped; and

the rotational axis (3) and the fixing bolt (4) are hooked just to

the radial bearings (5a and 5a⁵).

2. A method of manufacturing scissors for haircut in which a n upper member and a lower member is pivotally combined, the met

hod comprising the steps of:

forming projections (8 and 8) on the midway of insert holes (7

and 7 ^s) of the upper member (1) and the lower member (2) respectiv

ely;

inserting radial bearings (5a and 5a⁵) outer surface of the proj

ections (8 and respectively;

interposing a thrust bearing (5b) between the projections (8 a

nd 8 ; and

inserting a cylindrical rotational axis (3) into the radial bearin

gs (5a and δa^ and the thrust bearing (5b), the rotational axis (3) ha

ving a female screw therein so as to be combined with a fixing bolt (

4), wherein a length of the rotational axis (3) inserted into the ins

ert holes (7 and T) is identical to a thickness of the upper member (

1) and the lower member (2) when overlapped; and

the rotational axis (3) and the fixing bolt (4) are hooked just to

the radial bearings (δa and 5SL).