JPH0595467U - knife - Google Patents

Abstract

(57) [Abstract] [Purpose] Realization of a knife that can be safely handled by children and is easy to carry [Structure] A blade can be installed only in the space created by the window hole of the plate-shaped body with the window hole. Exposed.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a knife that is easy to carry and is safe for children to sharpen pencils.

[0002]

[Prior Art]

 Conventionally, various knives used to sharpen pencils are exposed because the cutting edge and the tip are exposed to the outside significantly, and it has been regarded as dangerous for children who frequently use pencils, so it is said that it is important to have a handheld knife The result was that the child took up the experience of sharpening things.

[0003]

[Problems to be solved by the device]

 The present invention is intended to provide a pencil knife that is safe for children and portable, except for the above problems.

[0004]

[Means for Solving the Problems]

 A thin plate-shaped blade is attached to a plate-shaped body with a roughly rectangular window hole of approximately 1 cm x 3 cm, so as to block about one third from the longitudinal edge of the window hole. At this time, the blade of the knife should make a boundary between the closed part of the window hole and the remaining part. Also, the blade of the blade should not be exposed outside the space inside the body created by the window hole.

[0005]

[Action]

 With the tip of the pencil to be cut through the window hole, put the blade on the pencil and sharpen it.

[0006]

【Example】

 FIG. 1 represents the simplest principle of the invention. The blade in the window hole is embedded in the plastic body from the time of manufacture, but this causes the blade to deteriorate and the entire blade is thrown away. The one shown in FIG. 2, which is equipped with, is practical.

In FIG. 2, the plate material 3 shown in FIG. 3 and the plate material 4 shown in FIG. 4 are stacked in the order of 3, 4, 3 to remove the cape-shaped portion 5 of the plate material 4 from the tip to the root. The main body is the one that is bonded together.

Then, the square plate-shaped blade 1 shown in FIG. 5 is mounted by immersing it in the same surface as the plate member 4 from the position where the window hole of the plate member 3 is widened.

FIG. 6 shows a state in which the blade 1 is mounted on the same surface as the plate member 4. Although the plate material 3 is omitted in the drawing, it serves as a guide for supporting both sides of the blade.

Since the cape-shaped portion 5 is not fixed to the plate material 3, it acts as a spring that pushes the blade 1, and when the blade 1 is pushed all the way in, the protrusion 6 of the plate 4 is caught.

A hole 2 sized to allow a pencil to pass through is provided in the center of the blade 1, and the pencil is operated when the blade is attached, the protrusion of the blade is released, and the blade is removed.

The blade 1 has a square outer shape, and if blades are attached to the four sides, one blade can use a new blade four times. If the blade 1 is not attached over the entire length of each side and both ends of the side are left as shown in FIG. 5, the blade does not damage the plate material 4, and it is safe when the blade 1 is a single body.

This knife is used as shown in FIG. The fist-shaped right hand palm is the scissors with the upper side of the main body and the human finger on the bottom side, while the left hand with a pencil is responsible for pushing the lip on the back side of the knife. Most of the power for cutting is borne by the left hand, so the right hand acts as a lead of the knife body, and the knife can be carried smoothly.

In FIG. 2, the width of the window hole of the plate material 3 where the blade 1 is located is appropriately about 1 cm, which is about 20% larger than the diameter of the pencil. ~ 3 times more room is needed.

If the main body is made of a three-dimensional molded body of plastic or metal instead of a plate, it is inferior in portability, but it can be formed into a shape that is easier to hold during use.

[0016]

[Effect of the device]

 The knife of the present invention has a structure in which the blade to be used is exposed only in the space inside the main body, so there is little danger during use, and it is thin and compact, so it is easy to carry.

[Brief description of drawings]

FIG. 1 is a perspective view showing the principle of the present invention.

FIG. 2 is a perspective view showing an embodiment of the present invention.

FIG. 3 is a three-dimensional view of parts in the example.

FIG. 4 is a three-dimensional view of parts in the example.

FIG. 5 is a three-dimensional view of a cutting tool in an example.

FIG. 6 is a plan view showing a state where a blade is attached to a partial product in the embodiment.

FIG. 7 is a perspective view illustrating a method of using the knife of the present invention.

[Explanation of symbols]

 1 Cutlery 2 Hole 3 Plate material 4 Plate material 5 Cape-shaped part 6 Protrusion

Claims (3)

[Scope of utility model registration request] 1. A knife having a plate having a window hole as a main body, and a blade attached to the plate for use is exposed only in a space in the main body formed by the window hole. 2. The knife according to claim 1, wherein a molded product having a window hole is used instead of the plate having the window hole. 3. The window has a space through which a pencil can pass, in the remaining portion of the window hole which is closed by the blade.
Knife.