JPS6143402Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a knife, and more particularly to a knife that has an extremely simple structure and is easy to use.

Various types of knives have been proposed in the past, but most of them are composed of a large number of parts.

For example, in addition to the body and blade, most knives have side plates on both sides, which has the disadvantage of increasing the number of parts, requiring more assembly time, and increasing costs.

The present invention has been made to eliminate the above-mentioned drawbacks of the conventional knife, and aims to provide a knife that has an extremely simple structure, has a small number of parts, and is extremely easy to use.

Hereinafter, details of the present invention will be explained based on embodiments shown in the drawings.

The knife 1 according to the present invention is composed of a body 2 and a blade 3 rotatably supported on one end of the body 2.

The body 2 is integrally formed from metal as an elongated flat frame.

That is, the body 2 has left and right side plates 4, 4 that are continuous and integrally formed on the rear proximal end side, and these side plates 4, 4 are elongated and continuous, and the proximal end side is connected to the upper side of the side plates 4, 4. It is continuous with an elongated arm 5 that extends along the side plates 4, 4 at a predetermined distance from the side plates 4, 4.

The base end of the blade 3 is rotatably supported on the distal end sides of the left and right side plates 4, 4 via a shaft 6. The ends of the left and right side plates 4, 4 are connected by this shaft 6.

On the other hand, the arm 5 extends substantially parallel to the side plates 4, 4, and its free end is located close to the shaft 6, and the tip of the free end is attached to the side plates 4, 4.
A protrusion 7 is formed facing the direction.

This arm 5 has sufficient elasticity and always
It is given the elasticity to try to approach the side.

Further, the proximal end of the arm 5 and the proximal ends of the side plates 4, 4 are continuous, and a through hole 8 for passing a string or chain, for example, is formed in this continuous portion.

The base end of the arm 5 is a thick portion 5a as shown in FIG. 5, and is continuous to the side plates 4 through the thick portion 5a.

The distance between the side plates 4, 4 is approximately the same as the thickness of the blade 3.

The edge of the thick portion 5a on the side plates 4, 4 forms an arcuate portion 5b.

On the other hand, the blade 3 has a wall thickness that is approximately equal to the distance between the side plates 4, 4, but becomes thinner toward the tip, forming a sharp cutting edge.

An arcuate portion 9 is formed at the base end of the blade 3, and one end of this arcuate portion 9 is continuous to the cutting edge side of the blade 3, and the other end is continuous to the ridge side of the blade. A notch 10 is formed at the proximal end of the ridge of the blade so as to be continuous with the arcuate portion 9. Notch 1
Of both side edges of 0, the side edge continuous to the circular arc portion 9 is shallow, and the side edge continuous to the peak side is deep.

Further, the shape of this notch 10 is almost the same as the shape of the protrusion 7 formed at the tip of the arm 5.

Axis 1 is located in the middle of blade 3 and closer to the peak side.
1 is fitted and fixed. The overall length of this shaft 11 is slightly larger than the thickness of the entire body 2 including the side plates 4, 4, and as shown in FIG.
Both ends protrude slightly toward the outside of the side plates 4, 4.

Furthermore, an arc-shaped notch 4a is formed on the side edge of the side plates 4, 4 of the body 2 on the side opposite to the arm 5 at a position corresponding to the shaft 11.

Next, a method of using the knife according to the present invention constructed as above will be explained.

When the knife blade 3 is folded, it is located between the side plates 4, 4, and its peak slightly protrudes from the side edges of the side plates 4, 4, and the sharp cutting edge is shown in Figure 5. The thick part 5 at the base end of the arm 5
It is in a state opposite to the arcuate portion 5b of a.

At this time, the protrusion 7 formed at the tip of the arm 5 contacts the cutting edge side end of the arc-shaped portion 9 at the base end of the blade 3, and the strong elasticity of the arm 5 gives the blade 3 a tendency to rotate counterclockwise in Figures 1 and 5 around the axis 6.

However, the shaft 11 provided on the blade 3 is
It fits into a recess 4a formed on the side edge of the
This shaft 11 acts as a stopper and restricts rotation in the counterclockwise direction.

Therefore, the cutting edge of the blade 3 will not come into contact with the arcuate portion 5b, which is the edge of the thick portion 5a, and will not damage the cutting edge.

Further, the rotational behavior applied to the blade 3 in the counterclockwise direction in the figure ensures that the blade 3 will never fly out from the body 2 when being carried.

On the other hand, if you wish to use the blade 3 in its upright position, place your fingertips on the shafts 11 that protrude slightly on both sides of the side plates 4, 4, and rotate the blades clockwise about the shafts 6 as shown in Figure 6. For example, the portion 9a of the arcuate portion 9 at the farthest position from the shaft 6, which has a large curvature, begins to come into contact with the protrusion 7, so the arm 5 is elastically deformed in the direction in which the protrusion 7 separates from the blade 3, and the protrusion 7 becomes circular. Arc-shaped part 9
While sliding along the blade 3, the blade 3 and the body 2 become in a straight line as shown in FIG.

When the protrusion 7 is in the fitted state, the protrusion 7
Since the shape of the notch 10 is almost the same as that of the seventh
As shown in the figure, the tip of the protrusion 7 is located at the notch 1 of the blade 3.
It will be in a state where it is completely in contact with the deeper side edge of 0,
Since the blade 3 cannot be rotated any further and the protrusion 7 is completely fitted into the notch 10, the blade is locked in a state where it cannot be rotated in either the left or right direction by applying a normal external force. That means that.

After using the blade 3 with the blade 3 pulled out in a straight line, if you want to store the blade 3, first elastically deform the arm 5 in the direction away from the side plates 4, 4, and insert the protrusion 7 into the notch of the blade 3. After extracting from 10,
When a light external force is applied to the peak side of the blade 3, it begins to rotate around the shaft 6, and the protrusion 7 rides on the side of the portion 9b of the arcuate portion 9 having a small curvature from the tip of the shallow side edge of the notch portion 10. , If you further rotate blade 3,
The protrusion 7 slides along the arcuate portion 9, and the blade 3 is housed in its original state with the shaft 11 fitted into the recess 4a of the side plates 4, 4, as shown in FIG.

Note that the shaft 11 protrudes from the middle of the blade 3, but since it is located closer to the peak and has only a small amount of protrusion, it hardly gets in the way during use. On the contrary, it also serves as a decorative effect.

As is clear from the above description, according to the present invention, the shaft 11 fixed to the blade 3 can be used both as a stopper when the blade is housed in the body and as a knob when the blade is pulled out from the body. The blade can be reliably accommodated and extended.The body is made of a metal material, and the side plates 4, 4 and the arm 5 are integrally formed, and the arm 5 is spaced a predetermined distance from the side plates. It is possible to reliably provide elasticity, and the blade can be housed with a part of it exposed within the frame made up of both side plates and arms, and it has an extremely simple design, and at the same time has an elegant appearance. A knife full of practical and functional beauty can be obtained, and furthermore, since the number of component parts is extremely small, the structure is simple and easy to manufacture.

[Brief explanation of the drawing]

The figures are for explaining one embodiment of the present invention, and FIG. 1 is a front view, FIG. 2 is a top view, FIG. 3 is a bottom view, and FIG. Figure 5 is a sectional view taken along the line B-B in Figure 2, Figure 6 is a vertical front view of the blade in its open state, Figure 7 is a vertical side view of the blade in its open position, and Figure 8 is a vertical cross-sectional view of the blade in its open state. FIG. 9 is a longitudinal sectional front view of the folded state, and FIG. 9 is a sectional view taken along the line CC in FIG. 1...Knife, 2...Body, 3...Blade, 4...
... Side plate, 5 ... Arm, 6, 11 ... Axis, 7 ... Protrusion, 8 ... Hole, 9 ... Arc-shaped part, 9a ... Part with large curvature, 9b ... Part with small curvature , 10
...Notch.

Claims (1)

[Scope of utility model registration request] A notch is formed at the proximal end of the blade rotatably supported at the tip of the body, and rotational force is applied to the back metal placed on the back side of the body, and the front end of this back metal is In the knife, the formed protrusion can be engaged with and detached from the notch of the blade, and the protrusion is always in contact with and pressed against the proximal end of the blade. A pair of elongated side plates 4, 4, and an elastic arm 5 that is continuous from the base end of the side plates and extends along the side plates 4, 4 at a predetermined distance from the side plates 4, 4;
It consists of a protrusion 7 on the free end side of the arm 5 facing toward the side plates 4, 4, and is integrally formed of a metal material, and the blade 3 is located in the middle of the blade and at a position closer to the peak side. The shaft 11 is fitted and fixed in a state in which it slightly protrudes from the outside of the side plates 4, 4 of the body 2, and the shaft 11 is formed on the side edge of the side plates 4, 4 on the opposite side from the arm 5. A knife characterized in that it fits into a recess 4a.