JPWO2016143649A1 - Pencil sharpener - Google Patents

Abstract

A pencil sharpener that can be sharpened quickly and easily and is convenient to carry. A handle mounting hole 23 for rotatably mounting the handle 3 inserted in the other side surface of the case from a direction opposite to the direction in which the pencil is inserted is provided in parallel with the pencil inserted into the pencil insertion hole 2. By holding the pencil with one hand and holding the handle with the other hand and rotating the case in the manner of a spool, you can sharpen the pencil quickly and without feeling tired. Further, since the pencil can be sharpened while being fixed, even a short pencil can be sharpened easily.

Description

  The present invention relates to a small pencil sharpener that sharpens a pencil, and more particularly to a pencil sharpener that can sharpen a pencil lightly and quickly.

As a small pencil sharpener, various types have been proposed in which a pencil is inserted into an insertion hole and turned by hand (Patent Document 1).
Such a pencil sharpener has a configuration in which a conical core tip holding portion that reduces in diameter toward the inside is provided inside the case, and a cutting blade is attached to a slit provided along an inclined surface of the tip holding portion. Then, by inserting a pencil into the tip holding portion and rotating it, the peripheral side surface of the pencil is scraped by being obliquely pressed against the cutting blade, and the tip of the center appears.
JP-B-1-35760

However, since the hand is held with one hand and the pencil is rotated while being pressed with the other hand, it is necessary to rotate the pencil while applying force, which may cause fatigue.
Therefore, an object of the present invention is to provide a pencil sharpener that can be sharply and lightly sharpened without feeling tired and is convenient to carry.

  In order to solve the above-mentioned problems, a pencil sharpener according to the present invention is a pencil sharpener that inserts a pencil into a case from a pencil insertion hole provided on one side of the case and rotates the case to sharpen it. A handle mounting hole for rotatably mounting a handle inserted in the other side surface of the case from a direction opposite to the direction in which the pencil is inserted is provided in parallel with the pencil inserted into the pencil insertion hole. It is characterized by.

According to the pencil sharpener according to the present invention, in the pencil sharpener for shaving by inserting a pencil from the pencil insertion hole provided on one side of the case toward the inside of the case, the handle inserted from the opposite direction to the pencil insertion hole Since the handle attachment hole for attaching the handle is provided so as to be parallel to the pencil, by gripping the pencil with one hand, holding the handle with the other hand, and rotating the case in the manner of spooling, You can sharpen a pencil.
For this reason, compared with the conventional pencil sharpener which needed to rotate a pencil itself, pressing a pencil against a cutting blade, it can sharpen a pencil happily, without feeling tired. Further, since the pencil can be sharpened while being fixed, even a short pencil can be sharpened easily.

It is a perspective view which shows the pencil sharpener in 1st Embodiment of this invention. It is sectional drawing which shows the use condition of the said pencil sharpener. It is an exploded view of the pencil sharpener, wherein (a) shows a main body member, (b) shows a lid member, and (c) shows a handle member. It is sectional drawing which shows the 1st modification of the said pencil sharpener, (a) shows the use condition when not sharpening a core, (b) shows the use condition when sharpening a core. It is the AA arrow directional cross-sectional view in the said 1st modification, (a) shows the example which made the tip contact part detachable, (b) made position adjustment of the tip contact part possible. An example is shown. It is a perspective view which shows the 2nd modification of the said pencil sharpener. It is sectional drawing which shows the 3rd modification of the said pencil sharpener. It is sectional drawing which shows the 4th modification of the said pencil sharpener. It is sectional drawing which shows the 5th modification of the said pencil sharpener. The 6th modification of the said pencil sharpener is shown, (a) is sectional drawing, (b) shows the state which decomposed | disassembled the main body member and the cover member. It is sectional drawing which shows the use condition of the Example which provided the tip adjustment function in the said 6th modification. It is a perspective view which shows the 7th modification of the said pencil sharpener. It is sectional drawing which shows the 8th modification of the said pencil sharpener. It is a perspective view which shows the pencil sharpened by the said 8th modification. The structure of the 1st cutting blade and the 2nd cutting blade of the said modification is shown, (a) is a perspective view, (b) is a top view. The modification of the said 2nd cutting blade is shown, (a) is a top view, (b) is an AA arrow directional cross-sectional view. It is a perspective view which shows the 9th modification of the said pencil sharpener, (a) is the aspect which provided the 2nd cutting blade continuously with the 1st cutting blade, (b) is the aspect provided discontinuously. Show. It is a perspective view which shows the pencil sharpener which concerns on 2nd Embodiment of this invention. It is sectional drawing of the said pencil sharpener. It is sectional drawing which shows the modification of the said pencil sharpener. It is a perspective view which shows the pencil sharpener which concerns on 3rd Embodiment of this invention. It is sectional drawing of the said pencil sharpener. It is explanatory drawing which shows the state which sharpens a pencil with the said pencil sharpener. It is explanatory drawing which shows the pencil sharpener which concerns on 4th Embodiment of this invention. It is a front view which shows the Example of the said pencil sharpener.

  A preferred embodiment of the present invention will be described with reference to the accompanying drawings. In addition, embodiment of this invention is not limited to the following forms, Other aspects can also be implemented if the subject of this invention can be solved.

FIG. 1 is a perspective view of a pencil sharpener 1 according to the first embodiment of the present invention.
As shown in FIG. 2, this pencil sharpener 1 has a handle 3 attached to the other side surface of the case by inserting a pencil into the case through a pencil insertion hole 2 provided on one side surface of the case. The case is characterized in that the case is rotated in the manner of bobbin winding and the pencil is sharpened. As shown in FIG. 3, the case is constituted by a main body member 10, a lid member 20, and a handle member 30. .

The main body member 10 of the case is configured by providing a tip holding part 11 in a bottomed and uncovered casing.
The lead end holding portion 11 is a conical area whose diameter is reduced toward the inside of the case from the pencil insertion hole 2 provided on the one side surface 12 of the case, and a cutting blade is provided in the slit provided along the inclined surface. 13 is provided.
As the peripheral side surface of the pencil inserted into the core holding part 11 rotates while being obliquely pressed against the cutting blade 13, the pencil is sharpened toward the central core part. Yes.

By attaching a lid member 20 made of another member to the opening of the main body member 10, the other side surface portion of the case is configured.
The lid member 20 includes a main body portion 21 (that is, the other side surface of the case), an extension portion 22 that extends from the main body portion 21, and a cylindrical portion 23 that extends from the extension portion 22 in a right angle direction.
The cylinder part 23 is a part for rotatably mounting the handle 3 inserted in the other side surface part of the case from the direction opposite to the pencil insertion direction, and the inside functions as a handle mounting hole.

The cylindrical portion 23 extends toward the opposite side (outside) of the case, and is separated from the axis L of the pencil inserted into the pencil insertion hole 2 (that is, the axis of the core holding portion 11) by a predetermined distance (M). In this position, it is arranged in parallel with the axis L.
The larger the distance (M) from the axis L passing through the center of the pencil insertion hole to the handle mounting hole, the smaller the force can be turned, but the operability when rotating the case in the manner of thread winding, and In consideration of the formability, 1 cm to 10 cm (preferably 1.5 cm to 5 cm) is appropriate. In this embodiment, the design is 2 cm.
The handle mounting portion 31 of the handle member 30 is inserted in the cylindrical portion 23 of the lid member 20 (that is, the handle mounting hole) with play.

The handle member 30 is a cap-shaped handle 3 having the handle attachment portion 31 therein, and a retaining portion 32 is provided at the tip of the handle attachment portion 31.
The length (H) of the handle 3 is preferably long enough to be grasped by a hand, and is suitably 2 cm to 10 cm (2.2 cm in this embodiment). The length (T) of the handle attachment portion 31 is 5 mm to 5 cm (1.4 cm in this embodiment).

The usage state of the pencil sharpener 1 having the above-described configuration will be described.
When sharpening a pencil, the pencil is inserted into the case from the pencil insertion hole 2 provided on one side surface 12 of the case, the handle 3 is held with the other hand, and the case is rotated in the manner of bobbin winding.
Since the handle member 30 is inserted in the direction opposite to the pencil insertion direction, and the handle member 30 is positioned parallel to the pencil, the case can be lifted with a light force as if the bicycle pedal is being rubbed. Can be rotated. Along with the rotation of the case, the peripheral side surface is scraped off in a tapered manner by the relative rotation of the pencil in the pencil holder 11.

For this reason, it is possible to shave the pencil happily without feeling tired as compared with a conventional pencil sharpener that needs to rotate the pencil itself while pressing the pencil against the cutting blade.
In addition, since the handle 3 is rotated in the manner of bobbin winding while the pencil is fixed, the short pencil can be easily sharpened.

In the present embodiment, as shown in FIG. 4A, the lead that can be brought into contact with the lead of the pencil held by the lead holding part 11 at a predetermined position on the inner wall surface of the lid member 20 ′. A front contact portion 25 may be provided.
When the lid member 20 ′ is attached to the case body member 10, the core tip abutting portion 25 is formed by a pencil that is scraped while being held by the core tip holding portion 11 as a core tip having a desired thickness. Designed to abut when touched.

The lid member 20 ′ is configured to be removable, and as shown in FIG. 4B, the lid member 20 ′ (or the main body member 10) is attached in the opposite direction so that the tip of the pencil does not come into contact. By changing the shape, the tip can be sharpened. Thus, a pencil sharpener having a tip adjustment function is realized with a simple configuration.
Or you may comprise only this core tip contact part 25 so that removal is possible. When it is desired to sharpen the tip, the tip contact portion 25 is removed and used.

Alternatively, as shown in FIG. 5, the tip contact portion 25 ′ may be provided with an inclined portion so that the position of the tip contact portion 25 ′ can be adjusted so as to be contacted at a desired tip tip thickness.
As a method for adjusting the position, it may be mounted upside down, or for example, as shown in FIG. 5B, a rail 26 may be provided and the tip contact portion 25 ′ may be slid to adjust the position. .

In this embodiment, the case may have any shape, for example, a cylindrical shape (see FIG. 6).
The case may be transparent so that the pencil can be sharpened while confirming the sharpness of the tip of the lead, one side surface 12 provided with the pencil insertion hole 2 and the other side surface provided with the handle 3 ( You may give a predetermined design to case outer wall surfaces other than a cover part. In this case, when rotating around the axis X located between the pencil insertion hole 2 and the handle attachment hole (cylinder part), each case has a color different from that color so that a predetermined color appears. It is preferable to color the side surface.

Further, the side surface can be divided into a plurality of regions, and different colors can be colored for each region.
When adding colors, it is preferable to design the area of each region, the hue and brightness of the color, etc. according to the color mixing ratio in the chromaticity. For example, the colors of the hues (red, blue, yellow ( Three primary colors) such as green) may be colored. When you rotate the case, the colors of each area will be mixed, and you will be able to sharpen the pencil happily by making the colors appear unexpected.

Or you may give the pattern which a continuous motion appears on the side surface (The surface in which neither the pencil insertion hole 2 nor the handle 3 is provided) of a case. In this way, you can sharpen the pencil while having fun as if you were watching an animation.
In addition, learning items such as a multiplication table and a periodic table of elements may be displayed, or a display for advertisement may be attached as a novelty goods.

  The handle member 30 may be detachable. In this case, the handle attachment portion may be made of an elastically deformable member so that the tip retaining portion 32 can pass through the handle attachment hole 23, or the pencil sharpener 1 "shown in FIG. As described above, the writing tool may be detachable by the fastener 34. Thus, the handle member 30 'is configured with the writing tool, so that the number of writing tools to be carried can be reduced.

Moreover, the structure which extends toward the case side may be sufficient as the cylinder part 23 as a handle | steering-wheel attachment hole.
That is, as shown in FIG. 8, a cylindrical portion 23 ′ extending toward the case side (inner side) is provided, and a rod-like member such as a pencil is inserted into the cylindrical portion 23 ′, and the handle member (handle mounting portion 31 ′ ).
Also in this case, the positional relationship between the cylindrical portion 23 ′ and the axis (L) of the pencil inserted into the pencil insertion hole 2 is designed to be parallel at a position away from the predetermined distance (M).

Further, a pencil insertion hole 2 may be provided in the lid member 20 ″ as in the pencil sharpener 1 ″ shown in FIG. That is, a slit is provided in the lead end holding portion 11 "whose diameter is reduced from the pencil insertion hole 2 toward the inside of the case, and a cutting blade 13" is attached along the slit to constitute a lid member 20 ".
In this example, the other side surface of the case is the main body portion 10 ″, and the handle member 30 is attached to the extension portion 22 ″ along the surface. A cover 2 a for sealing the hole is attached to the pencil insertion hole 2.
Alternatively, as in the pencil sharpener shown in FIG. 10, the main body portion 21 ″ of the lid member 20 ″ may be provided with the pencil insertion hole 2 and the tip holding portion 11 ″. In this case, as shown in FIG. As shown, the main body 21 'of the lid member 20 "is attached to the opening of the main body member 10". When sharpening the pencil, the cover 2b attached to the main body 21 "so as to be rotatable is opened. As a result, the pencil insertion hole 2 appears.
In this case, as shown in FIG. 11, a tip contact portion 25 that can contact the tip of the pencil held by the tip holding portion 11 ″ may be provided in the case on the other side surface. .

As shown in FIG. 12, a hinge 26 may be provided between the main body 21 ″ and the extension 22 ″ of the lid member 20, and the handle 22 may be accommodated by bending the extension 22 ″.
Further, as shown in FIG. 13, a slit 16 is provided along the inclined surface of the tip holding part 11 ″, and a first cutting blade 17a is provided along the slit 16 and the cutting edge extends in an inclined manner. A two-blade structure may be employed in which a second cutting blade 17b extending in a direction substantially orthogonal to the pencil is provided at a position closer to the pencil insertion hole 2 than the tip.
This pencil sharpener 1 ″ is provided as a tool for cutting a pencil lead into the shape shown in FIG. 14. That is, a pencil sharpener suitable for a pencil made of a soft core material such as a colored pencil or a cosmetic pencil. It is provided as a container 1 ".

  In such a pencil, the front end portion of the main body portion 5 made of wood or the like has a trapezoidal cutting shape including a ring portion 7 and a taper portion 8, and a lead 6 ′ is formed from the opening of the ring portion 7. The exposed cutting shape is suitable. That is, the front end surface of the main body portion 5 is constituted by a link-shaped flat surface (that is, the ring portion 7) having an inner diameter corresponding to the diameter R of the core member 6 and having an outer diameter Y smaller than the pencil diameter X. In this shape, a tapered portion 8 that is continuously inclined is provided from the outer periphery of the ring portion 7 toward the peripheral side surface of the main body portion 5.

The first cutting blade 17 a for cutting the pencil main body portion 5 in an inclined manner is disposed in an inclined manner along the slit of the core tip holding portion 11. A tip contact portion 25 is provided at the distal end portion in the diameter reducing direction, and the cutting of the main body portion 5 by the first cutting blade 17a is designed to be stopped before the core material 6 appears. .
A second cutting blade 17b having a cutting edge extending in a direction substantially orthogonal to the inserted pencil is provided at a position close to the pencil insertion hole 2 from the core tip contact portion 25.

  As shown in FIG. 15, the second cutting blade 17b is for cutting off the tip of the portion cut by the first cutting blade 17a to expose the tip 6 '. It is designed to be cut in a direction substantially perpendicular to the longitudinal direction from the center toward the center. In this case, as shown in FIG. 16, it may have an arcuate cutting edge surrounding the core material 6.

The ring portion 7 and the taper portion 8 are formed simultaneously with the exposure of the core tip 6 ′ by designing to contact the core material 6 (or as close as possible) toward the tip portion 17 b ′ of the blade tip. It becomes possible.
In addition, the 2nd cutting blade 17b may be continuously provided in the rotation direction front-end | tip part of the 1st cutting blade 17a. For example, as shown in FIG. 17, the tip of the first cutting blade 17a ′ is bent in a direction perpendicular to the core material 6, and the second cutting blade 17b ′ is formed at the bent portion. In this case, the second cutting blade 17b ′ is rotated from the first cutting blade 17a ′ to the rotation destination so that the cutting by the second cutting blade 17b ′ is performed after the cutting by the first cutting blade 17a ′. It is preferable to design it so that it is bent toward the tip and substantially slidably contacted with the peripheral side surface of the core member 6 as it goes toward the tip (see FIG. 17B).

Next, the configuration of the pencil sharpener 100 according to the second embodiment will be described with reference to FIG. Note that members having the same configuration as those of the first embodiment are denoted by the same reference numerals, and description thereof is omitted.
As shown in FIG. 19, a pencil sharpener 100 according to the present embodiment inserts a pencil from the pencil insertion hole 2 provided on one side of the case toward the inside of the case, and rotates the case to sharpen it. The method is characterized in that a handle mounting hole is provided on the other side surface of the case.

That is, the pencil sharpener 100 according to the present embodiment is configured by the case main body member 10, the lid member 120, and the handle member 30, but the lid member 120 is not provided with an extension, and the main body member 10 is not provided. This is different from that of the first embodiment in that only the opening is covered.
The lid main body 121 as the other side surface of the case is provided with a cylindrical portion 123 for rotatably attaching the handle member 30 from a direction opposite to the pencil insertion direction. The cylindrical portion 123 is parallel to the pencil at a predetermined distance (M).
The handle attachment portion 31 of the handle member 30 is inserted into the cylindrical portion 123 of the lid member 120 (that is, the handle attachment hole) with play.

Also in the pencil sharpener 100 having the above-described configuration, as in the pencil sharpener according to the first embodiment, a pencil is inserted into the case from the pencil insertion hole 2 provided on one side surface 12 of the case, and the handle is held with the other hand. The pencil can be sharpened by holding 3 and rotating the case in the manner of a spool.
The handle member 30 in the present embodiment is not provided in the extension part of the lid member 120 and needs to be rotated in a small direction, but is low in bulk and is convenient for carrying.
Also in this embodiment, the volume when accommodated in a pencil case or the like can be further reduced by making the handle member 30 removable.

Also in this case, the handle member 30 may be a writing instrument, or may be an extension holder 135 used by being attached to the rear end of a short pencil, as shown in FIG. The extension holder 135 has a holder part 136 for holding a pencil, and a fastener 137 for fixing the inserted pencil functions as a retaining part. The extension holder 135 with the fastener 137 removed is inserted into the handle insertion hole 138, and the fastener 137 is attached to the tip of the holder portion 136 with the lid member 120 opened.
In addition, if the insertion hole for attaching a handle member is penetrated to one side part of the case, the handle member can be attached without opening the lid member.

Next, the configuration of the pencil sharpener 200 according to the third embodiment of the present invention will be described with reference to FIGS. 21 and 22. Note that members having the same configuration as those of the first embodiment are denoted by the same reference numerals, and description thereof is omitted.
In the pencil sharpener 200 according to the present embodiment, the handle attachment hole is an insertion hole 238 having a predetermined depth provided from the other side of the case toward the inside of the case, that is, the case body member 10 and the lid. It differs from those of the first and second embodiments in that it is constituted by only the member 220.

The lid member 220 is provided with a handle insertion hole 238 into which a member (for example, a writing instrument) similar to the handle is inserted, as shown in FIG. Then, the pencil can be sharpened by rotating the case in the manner of bobbin winding.
Since it is not necessary to provide a handle member, the pencil sharpener can be miniaturized.
Since the case main body member 10 and the lid member 220 are integrally molded via the hinge 15, the manufacturing cost can be reduced as much as possible.

Next, the configuration of a pencil sharpener 300 according to the fourth embodiment of the present invention will be described with reference to FIG.
The case of the pencil sharpener 300 includes a main body member 310 having a pencil insertion hole 2 at one end and a handle member 330. The main body member 310 is configured by providing a slit along the lead end holding portion 311 whose diameter decreases from the pencil insertion hole 2 toward the inside of the case, and attaching a cutting blade 313 along the slit.

  That is, the main body member 310 is bent along the inclined surface of the core tip holding portion 311. The bending angle (θ) is an angle (preferably 110 degrees) that can increase the pressing force on the cutting blade and rotate the pencil in a natural posture when rotating while pressing the pencil against the cutting blade 313. 170 degrees, more preferably 130 degrees to 150). In the embodiment shown in FIG. 25, by designing the bending angle (θ) to 140 degrees, the pressing force when the pencil is pressed against the cutting blade increases, and the pencil can be sharpened without feeling tired. It was.

The inside of the main body member 310 continues to the opening of the handle member 330.
That is, the front end (that is, the other side surface) of the main body member 310 is opened, and is sealed by the handle member 330 that forms a bottomed and uncovered cylindrical member. A handle 3 is formed on the outer wall surface of the handle member 330.
In use, the pencil is held with one hand, the pencil is held with the handle 3 with the other hand, and the pencil is rotated.
Since the handle member 330 is provided with the function of sealing the main body member 310 and the function of accommodating the cutting waste discharged through the slit of the main body member 310, the handle member 330 can have a compact shape.

  In particular, the handle 3 that presses and supports the case from the direction opposite to the insertion direction of the pencil toward the other side surface of the case is provided so as to form an obtuse angle with respect to the pencil. In addition, a natural posture can be maintained. Further, since the pencil can be pressed against the cutting blade without difficulty, the pencil can be sharpened without feeling tired.

  The present invention is not limited to the industrial field of office supplies for sharpening writing utensils, but in the cosmetics field as a pencil sharpener for sharpening eye pencils, and in the architectural field as a pencil sharpener for scraping rod-shaped members to produce wedges, etc. The present invention can be applied to an apparatus for cutting the tip of a long object in all industrial fields.

1, 100, 200, 300 ... pencil sharpener 2 ... pencil insertion hole 3 ... handle 10, 310 ... main body member 11, 311 ... core tip holding part 12 ... one side surface 13 , 313 ... Cutting blade 15 ... Hinge 17a ... First cutting blade 17b ... Second cutting blade 20, 120, 220, 320 ... Lid member 21, 121 ... Main body 22 ... extension parts 23, 123 ... cylindrical part 25 ... tip contact part 26 ... rail 30 ... handle member 31 ... handle attachment part 32 ... retaining part 30, 130, 330 ... handle member 133 ... writing instrument body 134 ... cap 135 ... extension holder 136 ... holder part 137 ... fastener 138, 238 ... insertion hole

Claims (14)

A pencil sharpener that inserts a pencil into the case from the pencil insertion hole (2) provided on one side surface (12) of the case and rotates the case to sharpen it,
A handle mounting hole for rotatably mounting the handle (3) inserted into the other side surface of the case from the direction opposite to the direction of inserting the pencil is parallel to the pencil inserted into the pencil insertion hole (2). A pencil sharpener characterized by being provided.   The pencil sharpener according to claim 1, wherein the handle attachment hole is a cylindrical portion (23) provided in an extension of the other side surface of the case.   The pencil sharpener according to claim 1 or 2, wherein the handle attachment hole is an insertion hole (38) having a predetermined depth provided from the other side surface of the case toward the inside of the case. .   The pencil sharpener according to any one of claims 1 to 3, wherein a handle member (30) is detachably attached to the handle attachment hole.   The pencil sharpener according to claim 4, wherein the handle member (30) is a writing instrument.   The pencil sharpener according to claim 4, wherein the handle member (30) is an extension holder member attached to a rear end portion of a short pencil.   With a lid member formed by attaching a cutting blade (13 ″) to a slit provided along a lead end holding portion (11 ″) whose diameter decreases from the pencil insertion hole (2) toward the inside of the case, the one side surface is The pencil sharpener according to any one of claims 1 to 6, wherein the pencil sharpener is configured.   The lead tip abutting portion (25) capable of abutting the lead tip of the pencil held by the lead tip holding portion (11 ") is provided in the case on the other side surface side. Item 8. The pencil sharpener according to Item 7.   A pencil sharpener having a cutting blade (13) attached to a slit provided along a lead end holding portion (11) whose diameter decreases from the pencil insertion hole (2) toward the inside of the case. A lead tip abutting portion (25) that constitutes the other side surface of the case with the lid portion (20) and can abut the lead tip of the pencil held by the lead tip holding portion (11), The pencil sharpener according to any one of claims 1 to 6, wherein the pencil sharpener is provided on a part of the inner wall surface of the lid (20). By cutting a pencil formed by placing the core material (6) in the center of the main body (5), a ring portion (a flat surface having an outer diameter smaller than the pencil diameter) is formed at the tip of the main body (5). A pencil sharpener for cutting into a shape having 7) and a taper portion (8) continuous from the ring portion (7) to the peripheral side surface,
A first cutting blade (17a) having a slit along the inclined surface of the tip holding portion (11) whose diameter decreases from the pencil insertion hole (2) toward the inside of the case and having a cutting edge along the slit is provided. Provided,
A second cutting blade (17b) extending in a direction substantially perpendicular to the pencil is provided at a position closer to the one side surface than an end portion on the other side surface of the first cutting blade (17a);
The taper portion (8) is formed by the first cutting blade (17a) by inserting a pencil into the pencil insertion hole (2) and rotating, and the ring portion ( The pencil sharpener according to any one of claims 1 to 9, wherein 7) is formed.   The pencil sharpener according to claim 10, wherein the second cutting blade (17b) is continuously provided in a cutting direction by the first cutting blade (17a).   The side surfaces other than the one side surface and the other side surface exhibit a predetermined color when the case is rotated around an axis (L) located between the pencil insertion hole (2) and the handle mounting hole. The pencil sharpener according to any one of claims 1 to 11, wherein the pencil sharpener is colored with a color different from that of the adjacent side surface portion.   When the case is rotated about the axis (L) located between the pencil insertion hole (2) and the handle mounting hole, the case outer wall surface other than the one side surface and the other side surface is continuously formed. The pencil sharpener according to any one of claims 1 to 12, wherein a pattern is displayed so that a movement appears. A pencil sharpener (300) that inserts and sharpens a pencil from a pencil insertion hole (2) provided on one side of the case toward the inside of the case, and the other side of the case from the direction opposite to the direction in which the pencil is inserted. A pencil sharpener characterized in that a handle (330) that presses and supports the side surface portion is provided so as to form an obtuse angle (θ) with respect to the pencil to be inserted.