JP2787810B2 - Barber shears - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of a pivot shaft portion of a barber scissors.

[0002]

2. Description of the Related Art The basic structure of scissors is to cross a pair of swords in an X-shape and to form an axial hole passing through both swords, as is well known.
The intersection is pivotally connected by a pivot shaft inserted through the shaft hole.

[0003] In addition, if the pivot shaft portion is loose in the axial direction, it does not exhibit a smooth cutting action, so that it must be tightened to some extent. However, if the blade is strongly tightened, the rotation of the blade may not be smooth, and there is known a means of interposing a resin washer between the blades so that the blade can operate smoothly even under strong tightening (Japanese Patent Publication No. 57-57). No. 50517). Further, means for mounting a bearing body comprising an inner / outer double cylindrical body instead of a washer has been previously proposed (JP-A-8-141).
225).

[0004]

In the case where a bearing body composed of a double cylindrical body is mounted on a pivot portion, the inner and outer cylindrical portions of the bearing body must be connected together with the other sword body. In recent proposals, the depth of the bottom surface of the pivot concave portion is adjusted so that the inner and outer cylindrical portions directly contact the bottom surface of the pivot concave portion of the sword body, or a connection plate provided on the end surface of the cylindrical portion is used. However, if it is based on the processing of the bottom surface of the concave portion, the production of the connection portion with the inner cylindrical portion will require a fine structure and precision, and also when a connection plate is interposed,
The connecting plate becomes a fine part, and its manufacture and handling are troublesome.

Accordingly, the present invention proposes a new scissor which is easy to manufacture when a bearing body which is an inner and outer cylindrical body is employed for a pivot portion of the scissor.

[0006]

The barber scissors according to the present invention are:
In a barber scissors in which a pair of swords are crossed in an X shape and a crossing portion is pivotally connected by a pivoting screw and a fastening nut that penetrate both swords, a bearing ball is interposed between the inner and outer double cylindrical portions. A bearing member, a cylindrical portion having a size that can be tightly fitted inside the inner cylindrical portion of the bearing member and having a pivot shaft hole at the center, and an upper surface of the outer cylindrical portion that abuts on the upper surface of the inner cylindrical portion of the bearing member. And a collar member consisting of a washer portion that covers the upper surface of the outer cylinder portion without contact, and the cylinder portion of the collar member is closely fitted to the inner cylinder portion of the bearing member to form a bearing body. The bearing body is housed in a concave portion provided on the opposing surface of the sword body in the portion, and the sword body and the collar member on the side that rotates integrally with the pivot portion are connected together, while the other sword body and the outer cylinder of the bearing member are connected. Parts are connected in a co-rotating manner.

In the above-mentioned co-rotating connection, the concave portion on the surface facing the pivot portion is formed as a shallow surface on the operating portion side and deep on the blade forming side, and the co-rotating connection is made by abutment between the bottom surface of the concave portion and the bearing body. It is characterized by becoming.

Since the inner and outer cylinders of the bearing are connected to the respective swords in a co-rotating manner, the rotational resistance of the pivot becomes the bearing of the bearing and the clamping pressure in the axial direction of the pivot. The rotational resistance can be significantly reduced even if is increased. Furthermore, the recessed part of the pivoting part facing surface is shallow on the operation part side,
If the blade forming side is formed on a deep inclined surface, an appropriate gap will be formed on the blade forming side, and the axial movement of the pivoting portion during the rotation of the blade (at the time of cutting the hair) based on the twist of the blade will be performed smoothly. Will be

[0009]

Next, an embodiment of the present invention will be described. The basic configuration of the barber scissors according to the present invention is similar to that of the conventional barber scissors, in which finger holes (operation units) 2a, 2 are provided at the ends of the blades 1a, 1b.
b, the pair of swords are crossed in an X-shape, shaft holes 3a, 3b are formed in the crossing portions, and concave portions 4a, 4b are formed in the blade body facing surfaces around the shaft holes 3a, 3b. A bearing 5 is provided in the recess 4 and a tightening nut 7 is screwed into a pivoting bolt 6 passing through the shaft holes 3a and 3b to be pivotally connected.

The bearing member 5 is formed by a bearing member 51 and a collar member 52.
Is a bearing ball 51 between the inner and outer double cylinders 511 and 512.
3, the collar member 52 has a size that can be tightly fitted inside the inner cylindrical portion 511 of the bearing member 51, and has a cylindrical portion 522 having a pivot shaft hole 521 at the center.
And a washer portion 523 that contacts the upper surface of the inner cylindrical portion 511 of the bearing member 51 but does not contact the upper surface of the outer cylindrical portion 512 and covers the upper surface of the outer cylindrical portion.
21 is formed by closely fitting the inner cylindrical portion 511 of the bearing member 51. The bearing body 5 is provided inside the recess 4, and the bottom surface of the recess 4 is formed as an inclined surface having a deeper blade portion and a shallower finger hole 2. The protrusion 41 corresponding to the bottom surface of the outer cylinder portion 512 of the bearing body is provided at the finger hole side portion of the bottom surface 4a.

Accordingly, when the bearing body 5 is housed in the recess 4 and the pivot bolt 6 is inserted therethrough and the tightening nut 7 is screwed and tightened, the collar member 52 serving as an outer peripheral portion of the upper and lower surfaces of the bearing body 5 is provided.
In addition, the outer cylinder portion 512 comes into contact with and is clamped only at the shallow portion of each recess 4 of each sword body 1a, 1b, that is, at the side of the finger hole (operation portion), and the rotating operation of the sword bodies 1a, 1b. Since the bearing member 51 is interposed in the bearing member 5, smooth operation is realized, and the configuration of the co-rotating connection is simplified by employing the collar member 52 for the bearing body 5. In addition, the blade part of the scissors, to improve its sharpness,
The blade itself is twisted to achieve the rubbing state of the blade during cutting, so that the blade rotates axially at the pivot point due to the twisting of the blade during its rotation. Action occurs. In particular, since the bottom surfaces of the recesses 4a and 4b are deeper on the blade side to create a gap with the bearing body 5, the axial operation at the time of opening and closing the scissors (during cutting operation). Is absorbed in the gap, so that the bearing function of the bearing body 5 can be enjoyed without any trouble.

Further, in the above-mentioned embodiment, a mechanism for preventing the tightening nut 7 from loosening using the leaf spring body 8 is additionally provided. On the bottom surface of the tightening nut 7, a radial uneven surface 71 is provided, and the surface of the blade 1b is formed. The plate spring body 8 is formed with a fastening hole 11 for an insertion piece of the leaf spring body 8 described later. A peripheral portion of the shaft hole 81 is formed in a bulged state, the rear end portion is bent downward to form an insertion piece 82, and the front end is flipped up to form a support portion 83. The left and right protruding portions 84 are formed on the radially uneven surface 71.
And a fitting concave and convex portion corresponding to. When the leaf spring body 8 is used as a washer for the tightening nut 7, the uneven surface 71 on the bottom surface of the nut and the fitting uneven part (left and right protruding part) 84 of the leaf spring body 8 are engaged to prevent loosening. In particular, if the anti-loosening action is realized by the elastic force of the cantilevered state of the left and right protruding portions 84 without being based on the elasticity of the entire front and rear arches of the leaf spring body as in the past, the leaf spring body 8 can be made small. it can.

[0013]

As described above, when the inner and outer double cylindrical bearing members are employed in the concave portion of the sword-facing surface of the pivot portion, the inner cylindrical portion is integrally formed with the collar member which covers one upper surface. It is a bearing body that has a bearing function in combination, and simplifies the sword body concave shape for co-rotating connection only with each cylinder body of the bearing member and each sword body, and provides a bearing action on the pivot joint. This facilitates the production of the provided barber scissors.

[Brief description of the drawings]

FIG. 1 is an overall plan view of an embodiment of the present invention.

FIG. 2 is an exploded perspective view of the main part (pivot part).

FIG. 3 is an enlarged sectional view of the main part.

FIG. 4 is a partial plan view showing the bottom surface of the concave portion.

[Explanation of symbols]

 1a, 1b Sword body 2a, 2b Finger hole 3a, 2b Shaft hole 4a, 4b Concave part 41 Projection part 5 Bearing body 51 Bearing member 511 Inner tube part 512 Outer tube part 513 Bearing ball 52 Color member 521 Pivot shaft hole 522 Tube part 523 Washer part 6 Pivot bolt 7 Tightening nut 8 Leaf spring

Claims (3)

(57) [Claims] 1. A barber scissors comprising a pair of swords having an operation portion formed on one end side crossed in an X shape, and a crossed portion pivotally connected by a pivoting screw and a fastening nut penetrating both blades. A bearing member having a bearing ball interposed between the inner and outer double cylindrical portions, a cylindrical portion having a size capable of being closely fitted inside the inner cylindrical portion of the bearing member and having a pivot shaft hole at the center, and a bearing member. Forming a collar member consisting of a washer that covers the upper surface of the outer cylinder without contacting the upper surface of the outer cylinder without contacting the upper surface of the inner cylinder;
The cylindrical portion of the collar member is closely fitted to the inner cylindrical portion of the bearing member to form a bearing body, and the bearing body is housed in a concave portion provided on the opposing surface of the sword body in the scissor pivoting portion, and the pivoting portion and A barber scissors characterized in that the sword body and the collar member portion which are integrally rotated are corotatably connected, and the sword body and the outer cylinder portion of the bearing member portion are corotatably connected. 2. The barber scissors according to claim 1, wherein the concave portion of the pivoting portion facing surface is formed as a shallow surface on the operation portion side and a deep inclined surface on the blade forming side, and the abutment between the concave portion bottom surface and the bearing body. Barber scissors characterized by a co-rotating connection. 3. The barber scissors according to claim 2, wherein a projection is provided on the bottom surface of the concave portion at a position where it contacts the lower surface of the outer cylindrical portion of the bearing member by pressing from the surface of the sword body. Barber scissors to do.