JP2590686Y2 - Refill eraser - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a refill eraser used for erasing characters and figures written on paper or the like.

[0002]

2. Description of the Related Art Conventionally, erasers of various shapes have been known, but flat rectangular parallelepiped shapes are generally used, and a wooden shaft similar to a pencil shaft is used for drafting and the like. An eraser core containing sand, which is thicker than a pencil core, is embedded in the center of the core over the entire length in the axial direction.

Further, as shown in Japanese Utility Model Publication No. 51-32492, a refilling member is provided in which a front end of a small diameter of a holding cylinder is fitted and held with a rear end of a pencil lead. 2. Description of the Related Art There is known a refillable pencil that is sequentially arranged in a longitudinal direction in a long and thin shaft tube, fitted and held, and is refillable.

[0004]

[Problems to be Solved by the Invention] The flat cuboidal eraser which is generally used as described above, uses eight corners and edges at the time of initial use to rub the parts on which characters on the paper are written. By erasing characters etc., the area that hits the paper is small, so it is inefficient when erasing letters etc. with a large area, and after a certain use, the area that hits the paper due to the wear of the corners will increase. Therefore, when erasing characters or the like having a small area, there is a possibility that adjacent characters that do not need to be erased may be erased. In addition, it is difficult to use a wooden shaft with an eraser core embedded in it except for special applications that erase a part of a figure with a small area, and it is necessary to sharpen the shaft, which is troublesome. There was a problem.

[0005] This invention solves the above-mentioned problems, and provides a relatively easy-to-use and refillable eraser capable of erasing characters and figures written in a medium area from the beginning of use. It is intended to be provided with a simple structure.

[0006]

SUMMARY OF THE INVENTION The refill eraser of the present invention has a holding portion in which a partitioning portion is formed in a central portion in the front-rear direction, and a detent ridge is formed at a plurality of circumferential positions on a front inner peripheral surface in the front-rear direction. A cylinder and an eraser main body having a tapered substantially truncated cone-shaped front end integrally formed with a cylindrical rear end through a cylindrical intermediate portion, and the rear end and the intermediate portion of the eraser main body are formed as described above. The refilling member is constituted by engaging with the ridge to press-fit and hold in the front portion of the holding cylinder, and making the rear end of the eraser main body abut against the partitioning portion to form the refilling member. The members are brought into contact with the front and rear adjacent holding cylinders so as to be refillably fitted and held, and the front end of the eraser body of the refilling member located at the foremost end is projected from the front end of the shaft tube. It is a thing.

[0007]

The refill eraser according to the present invention is to erase a character or the like written on paper at the front end of the eraser body at the foremost end protruding from the front end by holding the shaft tube in a hand. .

When the outer diameter of the shaft tube is made easy to hold,
The diameter of the eraser body is the same as the shortest side of the conventional flat rectangular parallelepiped eraser and smaller than the other sides, but it is larger than the diameter of the eraser core embedded in the wooden shaft, and the front end of the eraser body is tapered. Since it is almost frusto-conical, only characters and figures with a relatively small area can be erased, and characters with a medium area can be erased continuously from the beginning of use.

When the front end of the eraser body of the refilling member located at the forefront end is worn, the foremost refilling member is pulled out to the front side of the shaft tube and pushed into the shaft tube from the rear end. Thus, the second refilling member from the front end can be used as the foremost end, and there is no need to cut the conventional wooden shaft to remove the eraser core, so that it can be used with good workability.

[0010] Furthermore, the refill eraser according to the present invention is:
Depending on the hardness of the eraser main body and the elasticity of the holding cylinder, by adjusting the length and inner diameter of the cylindrical rear end of the eraser main body appropriately, the eraser main body does not slip out of the holding cylinder or rattle, Can be used while securely held.
Moreover, since the rear end and the intermediate portion of the eraser main body are engaged with the detent ridges formed along the front-rear direction at a plurality of locations on the inner peripheral surface of the front part of the holding cylinder, the eraser main body is used during use. Is easy to use because it does not rotate. For this reason, the refilling member can be easily assembled only by press-fitting the rear end portion and the intermediate portion of the eraser main body to the front portion of the holding cylinder.

Since the outer diameter of the holding cylinder of the refilling member is slightly increased due to the press-fitting of the rear end portion and the intermediate portion of the eraser main body, the front end portion or the rear end of the shaft tube like the refilling pencil described above. It is possible to hold the holding cylinder with the required resistance movably in the axial direction without providing separate members at the end, or at the front and rear ends. Therefore, it has a relatively simple structure and is not expensive.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. 1, 2 and 3, reference numeral 1 denotes a holding cylinder 2.
And an eraser main body 3.
The holding cylinder 2 is made of an integrally molded product of a colored synthetic resin having a certain degree of elasticity. An annular body 4a protruding from the inner peripheral surface and a cross connected to the center of the rear surface of the annular body 4a are provided in the center in the front-rear direction. The partition 4 is formed by the reinforcing member 4b in the shape of a circle.

The front portion 5 of the holding cylinder 2 has a circumferential direction 4 of the inner circumferential surface.
The rotation preventing protrusions 5a are formed at equal intervals in the front-rear direction, and the outer peripheral surface 5b of the front portion 5 is tapered to be tapered, and the thickness of the front portion 5 is reduced toward the front end. Also,
The rear part 6 of the holding cylinder 2 is formed to have an inner diameter slightly larger than the inner diameter of the front part 5.

The eraser main body 3 is formed in a cylindrical shape having a rear end 7 provided with a center hole 7a opening at the rear end, and a tapered front end at a front side of the rear end 7 via a cylindrical intermediate portion 8. A substantially frusto-conical front end 9 with a rounded edge is integrally formed, and the rear end 7 and the intermediate portion 8 are coaxial and have the same outer diameter.

The rear end portion 7 and the intermediate portion 8 of the eraser main body 3
Is press-fitted into and held in the front portion 5 of the holding cylinder 2, and is engaged with the detent ridge 5 a to prevent the eraser main body 3 from rotating with respect to the holding cylinder 2, and further, the front end of the eraser main body 3 9 is projected forward of the holding cylinder 2.

The eraser body 3 has a length of about 18 mm, a diameter of about 9 mm at the rear and middle portions, and a diameter of 5 to 6 m at the front end face.
m, the diameter of the center hole 7a is about 3 mm, and the depth is about 4.5 mm. When the eraser main body 3 is hard or the like, a groove in which the detent ridge 5a is engaged may be formed in the front-rear direction on the outer periphery of the rear end portion 7 and the intermediate portion 8 in advance.

In the refilling member 1 configured as described above, the holding cylinder 2 and the eraser main body 3 have the same or similar colors.
Five kinds of different colors are prepared, and five refill members 1 of different colors are fitted and held in the elongated shaft tube 10 in a refillable manner. That is, the shaft tube 10 is made of an integrally molded product of a transparent synthetic resin having a slight elasticity, and is provided with three holding ridges 10a along the front-rear direction from the front end to the rear end at equal intervals at three positions in the circumferential direction on the inner peripheral surface. Each is formed, and a tapered taper is formed at the front end 10b of the outer peripheral surface, and the thickness of the front end 10b is reduced toward the front end.

Then, five refill members 1 are arranged in the elongated shaft tube 10 in the front-rear direction, and the outer peripheral surface of the rear portion 6 of the holding cylinder 3 is held by the holding ridge 10a. The front end 9 of the eraser main body 3 projecting from the front end of the rear holding cylinder 2 is loosely inserted into the rear part 6 of the front holding cylinder 2. Further, the rear end of the holding cylinder 3 of the refilling member 1 at the rearmost end is positioned flat with the rear end of the shaft tube 10, and the front part 5 of the holding cylinder 2 provided on the refilling member 1 at the foremost end is provided.
Of the shaft tube 10 projects from the front end of the shaft tube 10. In this state, the corner refilling member 1 is prevented from moving back and forth (axially) and rotating around the axis unless a certain amount of force is applied.

Further, a cap 11 is detachably fitted to the front end of the shaft tube 10. The cap 11 is made of an integrally molded product of a transparent synthetic resin of the same material as the shaft tube 10, and includes a clip 11 a formed on the outer peripheral surface and a clip 11 a.
a, and a stopper 11b formed on the inner peripheral surface opposite to a. Note that the stopper 11b is brought into contact with the front end of the shaft tube 10 when the shaft tube 10 and the cap 11 are fitted together.
The cap 11 cannot be detached because the fitting length is too long,
The front end of the eraser body 3 of the refilling member 1 at the front end is the cap 1
1 is prevented from hitting the inner surface of the front end.

The refill eraser constructed as described above, with the cap 11 removed, erases characters, figures, and the like drawn with a pencil by the front end 9 of the eraser main body 3 provided on the frontmost refill member 1. In this case, the user is required to
And rub the parts with paper letters etc. with your fingers,
The eraser body 3 has a rear end portion 7 and an intermediate portion 8
Is press-fitted into the front part 5 and elastically deformed, so that it is securely held in the holding cylinder 2 by its restoring force, and the rear end part 7 and the intermediate part 8 are attached to the inner peripheral surface of the holding cylinder 2. Since it is engaged with the provided rotation preventing ridge 5a, it does not rotate around the axis with respect to the holding cylinder 2.

Since the rear end portion 7 of the eraser main body 3 is formed in a cylindrical shape by providing the center hole 7a, the amount of elastic deformation can be increased, and the eraser main body 3 can be reliably prevented from coming off and prevented from rotating. Even when the eraser body 3 increases the amount of elastic deformation of the rear end 7, the amount of elastic deformation of the front portion 5 of the holding tube 2 swelling to the outer peripheral side is small, and in the state where no external force directed forward is applied.
It does not unintentionally move in the direction in which it comes out of the holding cylinder 2.

Further, when the outer diameter of the shaft tube 10 is about 15 mm, the outer diameter of the eraser main body 3 is about 9 mm at the rear end portion 7 and the intermediate portion 6, and the front end portion 9 is formed in a substantially truncated cone shape. In addition, because the diameter is moderately larger than the eraser core with a diameter of about 4 mm embedded in the conventional wooden shaft, characters and figures written on a medium area from the beginning of use can be It can be erased continuously with good workability.

Even if the front end portion 9 of the eraser main body 3 is worn and shortened considerably by use, even if the front end portion 9 of the holding cylinder 2 is shortened.
Since the outer peripheral surface of the shaft tube 10 and the front end portion 10a is tapered, these portions can be used without being caught on paper or the like.

When the front end 9 of the eraser main body 3 provided on the foremost refilling member 1 is worn, the refilling member 1 is moved to the shaft pipe 10.
From the rear side, and pushes out the refilled member 1 into the shaft tube 10 from the rear end thereof, and holds the holding cylinder 2 of each refillable member 1.
Is moved forward, and the second refilling member 1 from the front end is used as the front end. Thereafter, each time the front end 9 of the eraser body 3 is worn, the above-described operation is repeated.

When the front end 9 of the eraser main body 3 of all the refill members 1 is worn, the eraser main body 3 of the holding cylinder 2 of each refill member 1 is replaced with a new eraser main body 3, or the eraser main body is replaced. By replacing the worn refilling member 1 with a new refilling member 1 and fitting and holding the refilling member 1 in the shaft tube 10, long-term use is possible. After the worn eraser main body 3 is removed from the holding cylinder 2, it can be melted and reused.

When an unused refill eraser or the eraser main body 3 is not used, the eraser main body 3 can be protected from dust or the like by fitting the cap 11 to the front end 10a of the shaft tube 10.

In this embodiment, the shaft tube 10 and the cap 11 are formed of a transparent synthetic resin, and the holding tube 2 of the refill member 1 is formed.
And the eraser body 3 have the same or similar colors, and five refilling members 1 of five different colors such as pink, orange, yellow, green and blue are arranged in the front-rear direction in the shaft tube 10. , Shaft tube 10 or cap and cap 11
Through, and can see each refilling member 1 from the outside,
The appearance is beautiful. Further, when the material of the eraser main body 3 of each refilling member 1 is made of five kinds, such as hard and soft, the material can be used for identification of the material of each eraser main body 3 by coloring.

In the present invention, the number of refilling members is not limited to five in the above embodiment, but may be several to one.
It can be appropriately changed to about 0 or several. The dimensions of the eraser main body can be changed as appropriate, but for general use, it is preferable to set it to the size of the above-described embodiment, and the material of the eraser main body can be appropriately changed in hardness and softness. Soft or sand-filled materials are appropriately combined and arranged in one shaft tube, and the necessary materials are selected according to the user's preference,
You may use it properly according to the kind of writing implement which wrote the character and the figure, and the material, such as paper.

[0029]

As described above, the refill eraser according to the present invention has a partition portion formed in a central portion in the front-rear direction, and a plurality of detent ridges extending in the front-rear direction at a plurality of circumferential positions on the inner peripheral surface of the front portion. A holding cylinder and an eraser main body having a tapered substantially frustoconical front end formed integrally with a cylindrical rear end via a cylindrical intermediate part, and a rear end and an intermediate part of the eraser main body. The refilling member is constituted by engaging with the protrusion and press-fitting and holding in the front portion of the holding cylinder, and making the rear end of the eraser main body abut on the partitioning portion. The refilling member is brought into contact with the front and rear adjacent holding cylinders, and is fitted and held so as to be refillable, and the front end of the eraser body of the refilling member located at the foremost end projects from the front end of the shaft tube. The following effects can be obtained.

That is, the refill eraser according to the present invention is to erase a character or the like written on paper at the front end of the eraser body at the foremost end protruding from the front end of the shaft tube by hand. It is.

Then, when the outer diameter of the shaft tube is made easy to hold,
The diameter of the eraser body is the same as the shortest side of the conventional flat rectangular parallelepiped eraser and smaller than the other sides, but it is larger than the diameter of the eraser core embedded in the wooden shaft, and the front end of the eraser body is tapered. Since it is almost frusto-conical, only characters and figures with a relatively small area can be erased, and characters with a medium area can be erased continuously from the beginning of use.

When the front end of the eraser body of the refilling member located at the forefront is worn, the foremost refilling member is pulled out to the front side of the shaft tube and pushed into the shaft tube from the rear end. Thus, the second refilling member from the front end can be used as the foremost end, and there is no need to cut the conventional wooden shaft to remove the eraser core, so that it can be used with good workability.

Further, the refill eraser according to the present invention is:
By properly adjusting the length and inner diameter of the cylindrical rear end of the eraser main body according to the hardness of the eraser main body and the elasticity of the holding cylinder, the eraser main body can be securely inserted without slipping out of the holding cylinder. It can be used while being held at
Moreover, since the rear end and the intermediate portion of the eraser main body are engaged with the detent ridges formed along the front-rear direction at a plurality of locations on the inner peripheral surface of the front part of the holding cylinder, the eraser main body is used during use. Is easy to use because it does not rotate. For this reason, the refilling member can be easily assembled only by press-fitting the rear end portion and the intermediate portion of the eraser main body to the front portion of the holding cylinder.

The outer diameter of the holding cylinder of the refilling member is slightly increased by press fitting of the rear end portion and the intermediate portion of the eraser main body. It is possible to hold the holding cylinder with the required resistance movably in the axial direction without providing separate members at the end, or at the front and rear ends. Therefore, it has a relatively simple structure and is not expensive.

[Brief description of the drawings]

FIG. 1 is a front view showing a refill eraser according to an embodiment of the present invention;

FIG. 2 is a sectional view taken along line AA of FIG. 1;

FIG. 3 is an enlarged sectional view taken along line BB of FIG. 1;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Refilling member 2 Holding cylinder 3 Eraser main body 4 Partition part 5 Front part of holding cylinder 5a Detent ridge 6 Rear part of holding cylinder 7 Rear end of eraser 7a Center hole 8 Intermediate part of eraser main body 9 Front end of eraser main body 10 Shaft tube 10a Holding ridge 11 Cap 11b Stopper

Claims (1)

(57) [Scope of request for utility model registration] 1. A holding cylinder in which a partitioning part is formed in a central part in the front-rear direction and a detent ridge is formed at a plurality of circumferential positions on a front inner peripheral surface, and a cylindrical intermediate part is formed at a cylindrical rear end. And an eraser body integrally formed with a tapered substantially frustoconical front end portion via a portion. The rear end portion and the intermediate portion of the eraser body are engaged with the ridges so as to be in front of the holding cylinder. Pressing and holding in the section, the rear end of the eraser main body is abutted against the partition section to constitute a refilling member, a plurality of the refilling members in the elongated shaft pipe, holding cylinder adjacent to the front and rear of these. A refill eraser which is brought into contact with the refill so as to be refillably fitted therein, and wherein a front end of an eraser main body of a refill member located at the foremost end is projected from a front end of the shaft tube.