JPH08107984A - Mouting structure for blade of scissors - Google Patents

Abstract

PURPOSE: To make opening/closing center axis supporting holes easy to match with each other by surely mounting a blade on a grip handle and to simplify structure by guiding the base terminal part of the blade to a blade positioning recessed part by both guide faces when inserting the blade and making the opening/closing center axis supporting holes on the base terminal parts of both grip handles and both blades match with each other. CONSTITUTION: When the base terminal part 4a of the blade 4 is inserted from a blade insertion/desertion port 17 to the blade positioning recessed part 13 and the guide face 10 of the base terminal part 4a abuts on the guide face 18 of the blade positioning recessed part 13 in a scissor piece 2 on one side, a force to fit the base terminal part 4a in the blade positioning recessed part 13 can be generated by the function of the guide faces 10, 18 inclined to a blade inserting direction P. Also, since no fitting hole or fitting projecting part is provided, the mounting structure of the blade 4 on the grip handle 3 can be simplified. Moreover, since a fitting arm 11 is inserted to a bag part 13a, the blade 4 can be prevented from coming off the grip handle 3 accidentally.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure in which a pair of scissors having a blade attached to a grip handle made of plastic is rotatably supported by an opening / closing center shaft so that the blade is attached to the handle. It is a thing.

[0002]

2. Description of the Related Art Conventionally, as scissors of this type, there is one shown in Japanese Utility Model Publication No. 50-45574. In this scissors, a pair of fitting projections are formed on the blade overlapping portions provided on both grips near the center axis of opening and closing, and at the base end of both blades it is the blade of the grip. A pair of fitting holes into which both fitting projections are fitted when they are superposed on the body overlapping portion are formed.

[0003]

However, both the fitting holes of the blade and the fitting projections of the handle are completely aligned, and the blade and the handle are located at the center of rotation of the opening / closing center shaft. Since both fitting holes and both fitting projections restrict relative movement in all directions within a plane orthogonal to each other, when one fitting hole is fitted into one fitting projection, the other fitting There is a possibility that the fitting hole and the other fitting hole may not be aligned and the blade may not be attached to the handle.

Therefore, the scissors disclosed in Japanese Patent Laid-Open No. 2-179990 have been proposed. In this scissors, since there is so-called looseness that allows relative movement between the fitting hole and the fitting protrusion, even if they have a dimensional error, the dimensional error is allowed within the range of the looseness. Therefore, the blades can be securely attached to the grip handle, and the open / close center shaft support holes at the base ends of the grip handles and the blades can be easily aligned with each other.

However, the fitting hole and the fitting projection must be formed, which complicates the mounting structure of the blade. The present invention relates to scissors in which opening / closing center axis support holes are provided at the base ends of both handle and blades, and the blades are securely attached to the handle to facilitate matching of the opening / closing center axis support holes with each other. Along with that, the purpose is to simplify the structure.

[0006]

As shown in the drawings of the embodiments described below, in the blade scissors mounting structure according to the present invention, the blade (4) is attached to the plastic grip handle (3). The pair of scissors pieces (1, 2) are rotatably supported by the opening / closing center shaft (5). The central axis of opening and closing (5)
Blades overlapped part (1
2) is provided with a blade positioning recess (13) into which the base end portion (4a) of the blade (4) is fitted from the blade insertion / removal opening (17). The base end portion (4a) of the blade (7) and the blade insertion / extraction opening (17) are provided with guide surfaces (10, 18) that come into contact with each other when the blade is inserted. At least one guide surface (10) of the two guide surfaces (10, 18)
Is inclined with respect to the blade insertion direction (P). When the blade is inserted, the guide surfaces (10, 18) guide the base end portion (4a) of the blade (4) to the blade positioning recess (13), and the grip handle (3) and the blades (3) The open / close center shaft support holes (6, 14a, 14b) at the base end portion (4a) of 4) are made to coincide with each other.

[0007]

For example, as shown in FIG. 2B, in one scissor piece (2), the base end portion (4a) of the blade (4) is inserted into the blade positioning recess (17) from the blade insertion / extraction opening (17). 13) and when the guide surface (10) of the base end portion (4a) is brought into contact with the guide surface (18) of the blade positioning recess (13), it is inclined with respect to the blade insertion direction (P). This guide surface (10, 1
By the action of 8), a force for fitting the base end portion (4a) into the blade positioning recess (13) is generated.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. In both scissors pieces 1 and 2 shown in FIG. 1A, a blade 4 is attached to a plastic handle 3 and is rotatably supported by an open / close center shaft 5.

As shown in FIGS. 1 (b) and 2 (a),
In the blade body 4, an opening / closing center axis support hole 6 is provided at a base end portion 4a thereof, and a cutting edge 7 is extended in a longitudinal direction of the blade body 4 at an abdominal edge on a tip side of the support hole 6. At the same time, on the opposite side of the cutting edge 7, a back edge 8 extends along the cutting edge 7. Further, a positioning edge 9 is continuously extended substantially linearly from the cutting edge 7 at an abdominal edge on the base end side of the support hole 6,
Similarly, a guide surface 10 is continuously formed in a step shape from the back edge 8 at the back edge on the base end side. The guide surface 10 is inclined so as to approach the positioning edge 9 toward the base end side. Further, a fitting arm 11 extends from the guide surface 10 along the positioning edge 9 toward the base end side.

In the blade overlapping portion 12 provided at the tip of both grip handles 3, a blade positioning recess 13 is formed,
Support holes 14a and 14b are provided in the blade positioning recess 13 so as to penetrate therethrough. The blade positioning recess 13 has both positioning walls 15 so as to match the shape of the base end 4a of the blade 7.
A blade insertion / removal opening 17 is formed between the two positioning walls 15 and 16 and is provided between the positioning walls 15 and 16. Blade insertion and removal 1
7, one of the positioning walls 16 has a guide surface 10 for the blade 4.
Like the guide surface 10, the guide surface 18 that can be contacted with is inclined. A bag portion 13a is formed on the base end side of the blade positioning recess 13.

As shown in FIG. 2B, in one scissor piece 2, the base end portion 4a of the blade body 4 is inserted into the blade body positioning concave portion 13 from the blade body insertion / removal opening 17 to form the base end portion 4a. Fitted arm 1
1 is inserted into the bag portion 13a of the blade positioning recess 13, and the guide surface 10 of the base end 4a is inserted into the blade positioning recess 1.
When contacting the guide surface 18 of No. 3, the guide surface 10 inclined with respect to the blade insertion direction P causes the proximal end portion 4 of the same.
A force that causes the positioning edge 9 of a to approach the positioning wall 15 of the blade positioning recess 13 is generated, and the fitting arm 11 of the base end portion 4a is generated.
Is inserted into the bag portion 13a of the blade positioning recess 13, the base end 4a is fitted into the blade positioning recess 13, the positioning edge 9 overlaps with the positioning wall 15, and the guide surface 10 and the back edge. Part of 8 is positioning wall 1
Polymerize to 6.

Therefore, as shown in FIG. 2 (c), the blade 4 is securely attached to the grip handle 3 so that the base end 4a and the support holes 6 and 14a of the blade positioning recess 13 are aligned with each other. . Although not shown, this point is the same for the other scissor piece 1, and the base end 4a and the support holes 6 and 14b of the blade positioning recess 13 are aligned with each other. Further, unlike the case of the prior art, since there is no fitting hole or fitting protrusion, the structure for attaching the blade 4 to the handle 3 is simple. Furthermore, since the fitting arm 11 is inserted into the bag portion 13a, the blade body 4 does not accidentally fall out of the grip handle 3.

Then, the scissors pieces 1 and 2 are overlapped with each other, and the female shaft 5a and the male shaft 5b of the opening / closing center shaft 5 are inserted into the respective support holes 6, 14a and 4b and screwed together, as shown in FIG. ) Assembled as scissors.

[0014]

According to the present invention, the opening / closing center shaft support holes (6, 6) are formed in the base ends (4a) of the grip handles (3) and the blades (4).
In the scissors provided with 14a, 14b), the blade body (4) is surely attached to the grip handle (3) so that the opening / closing center shaft support holes (6, 14a, 14b) are easily aligned with each other. The structure for attaching the blade (4) to the grip handle (3) is simplified.

[Brief description of drawings]

1A is an assembled perspective view showing scissors of the present embodiment, and FIG. 1B is an exploded perspective view of the same.

FIG. 2 is a plan view showing a procedure of inserting a blade into a handle with scissors.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Scissors piece, 2 ... Scissors piece, 3 ... Grip handle, 4 ... Blade, 4a ... Blade base end, 5 ... Opening / closing center axis, 6 ... Opening / closing center axis support hole, 1
0 ... Guide surface, 12 ... Blade overlapping portion, 13 ... Blade positioning recess, 14a, 14b ... Opening / closing center axis support hole, 17 ... Blade insertion / extraction hole, 18 ... Guide surface, P ... Blade insertion direction.

Claims (1)

[Claims] 1. A scissor in which a pair of scissor pieces (1, 2) having a blade (4) attached to a plastic handle (3) are rotatably supported by an open / close center shaft (5). In the blade overlapping portion (12) provided on both grip handles (3) near the opening / closing center axis (5), the base end portion (4a) of the blade (4) is provided.
Is provided with a blade positioning recess (13) into which the blade is inserted from the blade insertion / extraction opening (17), and the base end portion (4a) of the blade (7) and the blade insertion / extraction opening (17) are mutually inserted when the blade is inserted. A guide surface (10, 18) that abuts is provided, and at least one of the guide surfaces (10, 18) is provided.
Is inclined with respect to the blade insertion direction (P), and the guide end (4a) of the blade (4) is guided to the blade positioning recess (13) by the guide surfaces (10, 18) when the blade is inserted. The opening and closing center shaft support holes (6, 14a, 14b) in the base ends (4a) of the both grip handles (3) and the blades (4) are aligned with each other. Mounting structure.