JP3130468U - Pencil with eraser - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a pencil with an eraser capable of optimizing the ratio of the content of a rod-shaped eraser to the content of a pencil lead and making a rod-shaped eraser that can easily erase a fine part.
A pencil core 2 is disposed on one end side and a rod-shaped eraser 3 is disposed on the other end side in a shaft hole 11 provided along the axial direction in the central portion of a shaft body 1 having machinability. The pencil core 2 and the rod-shaped eraser 3 are pencils with an eraser that are fixed to the shaft body 1 so as not to rotate around the axis and to move in the axial direction.
[Selection] Figure 1

Description

  The present invention relates to a pencil with an eraser mainly used as a writing instrument.

As a conventional pencil with an eraser, for example, a stick that is detachably connected to the back side of the pencil through a cylindrical tube as a holder, and a press that uses a cylindrical tube that is a stick-shaped eraser on the back side of the pencil Is disclosed that is fixed so as not to rotate around the axis and to move in the axial direction (see, for example, Patent Document 1). Here, the former is shown in FIG. 9 of Patent Document 1, and the latter is shown in FIG.
Japanese Utility Model Publication No. 6-42274

  However, in the case of the former pencil with an eraser, it is practically quite difficult to protrude the soft eraser from the cylindrical tube to the rear side for a considerably long time. The content of the eraser is excessive, and the stick-shaped eraser is lost faster than the pencil lead.

  On the other hand, in the case of the latter pencil with an eraser, it is necessary to use a rod-shaped eraser having a certain outer diameter in order to prevent tearing when exchanging the rod-shaped eraser. However, since it is virtually impossible to make an eraser that does not wobble completely, there is a problem that it is actually quite difficult to make a stick-shaped eraser with a small outer diameter that can be erased to a fine part and a high degree of fixation. Has a point.

  Therefore, the object of the present invention is to optimize the ratio of the internal capacity of the rod-shaped eraser to the internal capacity of the pencil lead and to have a small outer diameter and a high degree of fixation that can easily erase fine parts. An object of the present invention is to provide a pencil with an eraser that can be a stick-shaped eraser.

  In order to solve the above problems, a pencil with an eraser according to the present invention has a pencil core on one end side and a pencil core on the other end side in a shaft hole provided along the axial direction at the center of a shaft body having cutting properties. The rod-shaped eraser is a pencil with an eraser, and the pencil core and the rod-shaped eraser are fixed to the shaft body so as not to rotate around the axis and to move in the axial direction.

  According to such a pencil with an eraser, a pencil lead is arranged on one end side and a rod-shaped eraser is arranged on the other end side in the shaft hole of the shaft body having cutting ability, and the pencil lead and the rod-shaped eraser are arranged on the shaft body. On the other hand, since it is fixed so that it cannot rotate around the axis and cannot move in the axial direction, it is possible to optimize the ratio of the internal capacity of the rod-shaped eraser to the internal capacity of the pencil core, and the fine parts can be easily A rod-shaped eraser having a small outer diameter that can be erased and a high degree of fixation can be obtained.

  In such technical means, from the viewpoint of increasing the internal capacity of both the pencil lead and the rod-shaped eraser, and extending the life of the product according to the present invention, the outer diameter of the rod-shaped eraser is It is preferable that the outer diameter of the core is set larger.

  In addition, when using a rotary pencil sharpener, it is possible to surely eliminate the situation where the pencil core and the stick-shaped eraser are wobbled, and the basic part of the product according to the present invention that the fine parts can be easily erased. From the viewpoint of securing the function, it is preferable that the degree of fixation of the rod-shaped eraser with respect to the shaft body is set to a size that can withstand the load received when shaving with the rotary pencil sharpener.

  According to the pencil with an eraser according to the present invention, the ratio of the content of the rod-shaped eraser to the content of the pencil core can be optimized, and the outer diameter dimension is fixed so that a fine part can be easily erased. A high-strength rod-shaped eraser can be obtained.

  Embodiments of the present invention will be described below in detail with reference to the accompanying drawings.

  FIG. 1 is a perspective view showing an overall configuration of a pencil with an eraser according to an embodiment of the present invention, FIG. 2 is an exploded perspective view showing a partial configuration of the pencil with an eraser, and FIG. 1 shows an external configuration of the pencil with an eraser. It is a perspective view.

  In these drawings, reference numeral 1 is a shaft as a shaft body, reference numeral 2 is a pencil lead, reference numeral 3 is a rod-shaped eraser, reference numeral 11 is a shaft hole, reference numeral 11a is a pencil core hole, reference numeral 11b. Indicates an eraser hole.

  In this embodiment, the pencil with an eraser is configured to include a shaft 1 similar to a pencil shaft, a pencil core 2, and a rod-shaped eraser 3, for example, as shown in FIGS. ing.

  Hereinafter, each of these components will be described in more detail.

(1) Shaft 1
As shown in FIG. 1, the shaft 1 is a shaft having a circular cross-sectional outer shape and is configured to have a cutting property.

  In this way, the shaft 1 is required to have a cutting property because the length dimension and shape of the rod-shaped eraser 3 protruding from the side end of the shaft 1 are appropriately optimized by cutting. This is to ensure the basic function of the pencil with an eraser according to the present invention, in which fine parts can be easily erased by making it possible. Therefore, if it plays such a role, in the present invention, instead of the shaft 1, that is, the shaft made of wood, a shaft made of resin or another shaft is used, Instead of a shaft having a circular surface shape, a shaft or other shaft having a polygonal cross-sectional shape can be used.

  As shown in FIGS. 1 and 2, the shaft 1 is a shaft hole 11 that extends along the axial direction and extends in the length direction at the center, and has a circular cross section. It is configured as having.

  As shown in FIGS. 1 and 2, the shaft hole 11 has a pencil core hole 11 a for arranging the pencil core 2 and an eraser hole 11 b for arranging the rod-shaped eraser 3. It is configured. Here, the pencil lead hole 11a is formed with a relatively small inner diameter dimension on one end side of the shaft 1 as shown in these drawings. Further, as shown in these drawings, the eraser hole 11b is formed to have a relatively large inner diameter dimension on the other end side of the shaft 1 with respect to the pencil core hole 11a.

  Thus, the shaft hole 11 is required to have the pencil core hole 11a and the eraser hole 11b so that the ratio of the internal capacity of the rod-shaped eraser 3 to the internal capacity of the pencil core 2 is optimal. This is because a pencil with an eraser that can effectively avoid a situation in which the stick-shaped eraser 3 disappears faster than the pencil lead 2 can be obtained. Therefore, if it plays such a role, in the present invention, instead of the shaft hole 11 having the pencil core hole portion 11a and the eraser hole portion 11b formed to have different inner diameter dimensions, it is the same. A shaft hole having a pencil core hole and an eraser hole formed as having an inner diameter of 1 mm may be used.

The shaft 1 is configured to play a role of fixing both the pencil core 2 and the rod-shaped eraser 3 so that they cannot rotate around the axis and cannot move in the axial direction.
Specifically, the degree of fixation of the pencil core 2 and the rod-shaped eraser 3 with respect to the shaft 1 is set to a size that can withstand the load that is applied when shaving with a rotary pencil sharpener. Thereby, when cutting the pencil with an eraser in the present embodiment using a rotary pencil sharpener, it is possible to surely eliminate the situation that the pencil core 2 and the rod-shaped eraser 3 are wobbled, As a result, it is possible to ensure the basic function of the pencil with an eraser according to the present embodiment, in which fine portions can be easily erased.

(2) Pencil lead 2
As shown in FIGS. 1 and 2, the pencil lead 2 is configured to be disposed in a pencil lead hole 11 a that is one end side in the shaft hole 11 of the shaft 1. Thereby, it is possible to project one side end of the pencil lead 2 from one side end of the shaft 1 through cutting using a rotary pencil sharpener or the like. As a result, the user can It is possible to write characters and the like using the protruding portion (see FIG. 3).

  The pencil lead 2 and the rod-shaped eraser 3 are configured to be fixed to the shaft 1 so as not to rotate around the axis and to move in the axial direction.

  Specifically, the degree of fixation of the pencil lead 2 with respect to the shaft 1 is set to a size that can withstand the load that is applied when shaving with a rotary pencil sharpener. Thereby, when cutting the part which concerns on the pencil lead 2 in the pencil with an eraser using a rotary pencil sharpener, the situation where the pencil lead 2 will wobble can be excluded reliably.

  As shown in FIGS. 1 and 2, the pencil core 2 has an outer diameter dimension set to be considerably smaller than the outer diameter dimension of the rod-shaped eraser 3. As a result, it is possible to increase the contents of both the pencil core 2 and the rod-shaped eraser 3 as much as possible. As a result, the product related to the pencil with an eraser in the present embodiment can have a long life. Is possible.

  Here, the ratio of the internal capacity of the rod-shaped eraser 3 to the internal capacity of the pencil core 2 is optimized in consideration of the hardness and ease of reduction of the pencil core 2 and the rod-shaped eraser 3 used in practice as much as possible. From the viewpoint of reducing the size, the ratio of the outer diameter “2” of the stick-shaped eraser 3 to the outer diameter “1” of the pencil core 2 is set to a ratio, and the length “1” of the pencil core 2 is set. On the other hand, it is preferable to set the length of the rod-shaped eraser 3 to a ratio of about “0.2 to 0.3”.

(3) Stick-shaped eraser 3
As shown in FIGS. 1 and 2, the rod-shaped eraser 3 is configured to be disposed in the eraser hole 11 b on the other end side in the shaft hole 11 of the shaft 1. Thereby, it is possible to project the other side end of the rod-shaped eraser 3 from the other side end of the shaft 1 through cutting using a rotary pencil sharpener or the like. Characters and the like can be erased using the portion (see FIG. 3).

  The rod-shaped eraser 3 is configured to be fixed together with the pencil lead 2 so as not to rotate around the axis and to move in the axial direction with respect to the shaft 1.

  Specifically, the degree of fixation of the stick-shaped eraser 3 with respect to the shaft 1 is set to a size that can withstand the load applied when shaving with a rotary pencil sharpener. Thereby, when cutting the part which concerns on the stick-shaped eraser 3 in a pencil with an eraser using a rotary pencil sharpener, it becomes possible to eliminate reliably the situation where the stick-shaped eraser 3 will wobble.

  As shown in FIGS. 1 and 2, the rod-shaped eraser 3 has an outer diameter dimension set to be considerably larger than the outer diameter dimension of the pencil core 2. As a result, it is possible to increase the contents of both the pencil core 2 and the rod-shaped eraser 3 as much as possible. As a result, the product related to the pencil with an eraser in the present embodiment can have a long life. Is possible.

  By the way, it is not required to adopt a special method as a method of manufacturing such a pencil with an eraser. That is, it is possible to appropriately select and combine commonly used pencil manufacturing methods.

  For example, when a shaft is used as the shaft body as in the present embodiment, the pencil with an eraser is manufactured by the following method.

  First, a concave groove for mounting the pencil lead 2 and the rod-shaped eraser 3 is formed on a pair of shafts forming the shaft 1. Next, the pencil lead 2 and the rod-shaped eraser 3 are mounted in both the concave grooves, and the shaft plates are bonded to each other with an adhesive. Thereafter, the bonded shaft plate is cut to form a pencil shaft having a desired outer shape, and a paint is applied to the outer peripheral surface of the cut pencil shaft. In this way, a pencil with an eraser is manufactured.

  The degree of fixation of the pencil core 2 and the rod-shaped eraser 3 with respect to the shaft 1 is mainly determined by the pencil core hole 11a and the eraser hole formed by a pair of concave grooves with respect to the outer diameter of the pencil core 2 and the rod-shaped eraser 3. This is ensured by setting the inner diameter dimension of the portion 11b to be slightly small, but is also secured by an adhesive interposed between the shaft 1, the pencil lead 2 and the rod-shaped eraser 3.

  As described above, according to the pencil with an eraser according to the present embodiment, the pencil core 2 is arranged on one end side in the shaft hole 11 of the shaft 1 having cutting ability, and the rod-shaped eraser 3 is arranged on the other end side. Furthermore, the pencil lead 2 and the rod-shaped eraser 3 are fixed to the shaft 1 so as not to rotate around the axis and to move in the axial direction.

  Therefore, according to such a pencil with an eraser, it is possible to optimize the ratio of the internal volume of the rod-shaped eraser 3 to the internal volume of the pencil lead 2, and it is possible to easily erase a fine part. It is also possible to secure the rod-shaped eraser 3 having a small outer diameter and a high degree of fixation.

It is a perspective view which shows the whole structure of the pencil with an eraser which concerns on one embodiment of this invention. It is a disassembled perspective view which shows the partial structure of the pencil with an eraser. It is a perspective view which shows the external structure of the pencil with an eraser.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Axle 2 Pencil lead 3 Bar-shaped eraser 11 Shaft hole 11a Pencil lead hole 11b Eraser hole

Claims (3)

Among the shaft holes provided along the axial direction in the central part of the shaft body having machinability, a pencil lead on one end side and a rod-shaped eraser on the other end side are pencils with an eraser,
The pencil with an eraser, wherein the pencil core and the rod-shaped eraser are fixed to the shaft body so as not to rotate around the axis and to move in the axial direction.   2. The pencil with an eraser according to claim 1, wherein an outer diameter dimension of the rod-shaped eraser is set larger than an outer diameter dimension of the pencil lead.   The degree of fixation of the rod-shaped eraser with respect to the shaft body is set to a size that can withstand a load received when shaving with a rotary pencil sharpener. pencil.

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