JP2018176674A - Pencil sharpener - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a pencil sharpener capable of coping with variations in pencil thickness.SOLUTION: There is provided a pencil sharpener 1 comprising a pencil lead-in portion 13 extending from a pencil socket 11 provided on one side of a case 10 to the inside and a conical pencil holding portion 14 of reduced diameter, having a structure in which a cutting edge 16 is provided along a slit provided in the pencil holding portion. The pencil lead-in portion is constituted by a tubular member 13a, and an O ring 18 pressed against the circumferential side surface of the pencil is fixed to the inner circumference thereof. Since the peripheral side surface of the pencil is held by the O-ring, the pencil can be rotated while being pressed into contact with the cutting edge with a uniform inclination.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a pencil sharpener that inserts, rotates and sharpens a pencil, and more particularly to a pencil sharpener that can cope with variations in thickness of pencils.

As a small hand-held pencil sharpener, a slit is provided in the conical holding part that reduces the diameter from the pencil insertion port provided on one side of the case to the inside of the case, and a cutting blade is provided along the slit A structure has been proposed (see Patent Document 1).
The thickness of the pencil is 8 mm according to the JIS standard, and the holding portion is designed in accordance with the standard.

JP-A-11-309994

However, it is difficult to cut all pencils uniformly because the thickness of the pencils varies slightly depending on the manufacturer and the center of the core has a bias.
In particular, in the case of a pencil thinner than the standard size, a gap is formed between the pencil and the pencil holding portion in the case, and the pencil tilts by that gap and rattle occurs when it is rotated, so cutting defects occur. The
Therefore, the present invention provides a pencil sharpener capable of coping with variations in thickness of a pencil by rotating the pencil inserted into the case while pressing the pencil with uniform inclination against the cutting blade. To aim.

  In order to solve the above-mentioned subject, the present invention is provided with a pencil introductory part which goes inside from a pencil receptacle provided in one side of a case, and a conical pencil holding part which carries out diameter reduction, and holds the pencil A pencil sharpener having a cutting blade provided along a slit provided in the part, wherein the pencil introducing part is constituted by a cylindrical member, and the inner circumference of the cylindrical member is pressed against the circumferential side surface of the pencil It is characterized in that the o-ring is fixed.

In this case, the cylindrical member is rotatably fixed to the case via a bearing, and the pencil is cut by rotating the cylindrical member together with the pencil inserted into the pencil socket. May be configured.
Alternatively, the cylindrical member may be fixed to the case, and the pencil may be rotated and cut while being in sliding contact with the curved peripheral side surface of the O-ring.

  In these cases, a main portion which has an inner diameter corresponding to the diameter of the pencil lead and a flat portion having an outer diameter smaller than the pencil diameter, and a taper portion continuous from the ring portion A pencil sharpener for producing a pencil having a core exposed from the ring, wherein the stopper stops cutting before the core of the held pencil appears at the tip of the pencil holder And a second pencil socket into which a pencil before the appearance of a core is inserted is disposed adjacent to the pencil socket, and the second pencil socket A second pencil holding portion, and a second cutting blade having a cutting edge extending in a direction substantially orthogonal to the inserted pencil provided in the second pencil holding portion; The tape portion is cut by the second cutting blade to expose the core portion. It may be the one.

  Alternatively, a main body portion including a ring portion having a flat surface having an inner diameter corresponding to the diameter of the pencil lead and having an outer diameter smaller than the pencil diameter, and a taper portion continuing from the ring portion; A pencil sharpener for producing a pencil having a core portion exposed from a ring portion, wherein the pencil insertion opening is more than a tip portion of the cutting blade provided on an inclined surface of the pencil holding portion The second cutting blade whose cutting edge extends in a direction substantially orthogonal to the pencil is provided at the second position, and the pencil is rotated in a state in which the pencil is inserted into the pencil insertion port, the tee by the cutting blade The rim portion may be formed, and the ring portion may be formed by the second cutting blade to expose the core tip.

In the pencil sharpener according to the first aspect, the pencil introducing portion extending from the pencil insertion port to the pencil holding portion is constituted by the cylindrical member, and the O-ring pressed against the circumferential side surface of the pencil is fixed to the inner periphery thereof. It is possible to prevent tilting when the pencil is rotated. This makes it possible to rotate the pencil inserted into the case while pressing it against the cutting blade with uniform inclination.
In the pencil sharpener according to claim 2, since the cylindrical member for introducing the pencil is rotatably fixed to the case via the bearing, the cylindrical member into which the pencil is introduced is rotated around the pencil lead. be able to. Since the pencil can be rotated while maintaining the angle to the cutting edge, the occurrence of cutting defects can be more effectively prevented.

In the pencil sharpener according to claim 3, the pencil rotates on the curved surface of the O-ring made of an elastic member while bringing the peripheral side of the pencil into sliding contact. Even if there is a variation in the thickness of the pencil, it is possible to prevent the occurrence of cutting defects.
The pencil sharpener according to claim 4 and claim 5 has a ring portion having a flat surface having an inner diameter corresponding to the diameter of the pencil lead and having an outer diameter smaller than the pencil diameter, and the main portion from the ring portion Even when cutting a pencil into a shape having a body portion consisting of a taper portion continuous to the circumferential side of the body, a core portion exposed from the ring portion, the variation in thickness of the pencil is accommodated. can do. In the case of pencils with soft cores, such as colored pencils and pencils for makeup, there are variations in thickness among manufacturers, which makes it possible to provide a general-purpose pencil sharpener.

It is a perspective view showing a pencil sharpener concerning a 1st embodiment of the present invention. It is a perspective view which shows the shape of the pencil cut by the said pencil sharpener. It is a longitudinal cross-sectional view which shows the structure of the 1st cutting part of the said pencil sharpener. It is a perspective view which shows the state which decomposed | disassembled the said pencil sharpener. It is a longitudinal cross-sectional view which shows the structure of the 2nd cutting part of the said pencil sharpener. It is a cross-sectional perspective view which shows the state which cut | disconnected the said pencil sharpener laterally. It is a perspective view which shows the state which cuts the pencil by the said pencil sharpener, (a) shows the state shaved by the 1st cutting part, (b) shows the state shaved by the 2nd cutting part. It is a longitudinal cross-sectional view of the 1st cutting part as a modification of the above-mentioned pencil sharpener, and (a) shows a non-use condition etc., and (b) shows use condition. It is a perspective view which shows the pencil sharpener which concerns on 2nd Embodiment of this invention. It is a longitudinal cross-sectional view of the said pencil sharpener. The cutting blade of the said pencil sharpener is shown, (a) is a perspective view, (b) is a top view. It is a perspective view showing the 1st and 2nd modification mode of the above-mentioned cutting blade. It is an explanatory view showing the 3rd modification mode of the above-mentioned cutting blade. It is a sectional view showing a pencil sharpener concerning a 3rd embodiment of the present invention. It is a perspective view which shows the use condition of the said pencil sharpener.

  Preferred embodiments of the present invention will be described based on the attached drawings. The present invention is applied to a pencil sharpener having a structure in which a pencil is cut and inserted by a cutting blade disposed in a slanted manner by inserting and rotating a pencil, and an example of the embodiment will be shown below.

FIG. 1 is a perspective view of a pencil sharpener 1 according to a first embodiment of the present invention. This pencil sharpener 1 is for cutting the pencil 2 into the shape shown in FIG. 2, and is suitable as a cutting shape of a color pencil or a cosmetic pencil which is often provided as an already-cut pencil.
That is, a colored pencil having a soft pencil core 3 has a ring portion 4 having a flat surface having an inside diameter R corresponding to the diameter of the pencil core 3 and having an outside diameter Y smaller than the pencil diameter X; It has been proved that core breakage can be effectively prevented by forming a cutting shape continuous from the ring portion 4 through the inclined taper portion 5 to the circumferential side surface of the main body portion 6.

The pencil sharpener 1 according to this embodiment is for cutting a pencil into such a shape, and is provided with two pencil insertion ports 11 and 21 on one side of the case 10, and a waste collection unit on the other side. It comprises twelve.
One of the pencil sockets 11 is a first pencil socket 11 for cutting the main body 6 in a slanted manner, and the second pencil socket 21 adjacent thereto is cut in a slanted manner It is an insertion port for cutting the taper portion 5 in a direction orthogonal to the pencil lead 3.

First, the 1st cutting part arrange | positioned on extension of the 1st pencil socket 11 is demonstrated. This cutting portion is a portion for cutting the main body portion 6 of the pencil in an inclined manner, and as shown in FIG. 3, the pencil introducing portion 13 directed to the inside from the first pencil insertion port 11 and the diameter reduction And a conical pencil holding unit 14.
The pencil holding portion 14 is provided with a slit 15, and the cutting blade 16 is disposed in an inclined manner along the slit 15 (see FIG. 4). A stopper 17 for stopping cutting before the core of the held pencil appears is disposed at the tip of the pencil holding portion 14.

By configuring the first cutting portion in this manner, the main body portion 6 is cut in an inclined shape by rotation of the pencil inserted in the pencil insertion port 11 of the younger brother 1, and the pencil core 3 appears Since cutting is stopped before, it is possible to prevent the pencil lead 3 from being scraped at the same time as the wooden body 6. Therefore, it can be prevented that the adhesive between the pencil lead 3 and the main body 6 is peeled off, and bending of the pencil lead 3 can be effectively prevented.
Next, a second cutting portion formed side by side with the first cutting portion will be described.

A pencil lead-in portion 23 is also provided toward the inside from the second pencil lead-in opening 21 disposed adjacent to the first pencil lead-in opening 11, and a pencil holding portion 24 is formed at the tip (see FIG. 5).
As shown in FIG. 6, the pencil holding portion 24 is in the shape of a truncated cone having a second cutting blade 26 whose tip extends in the direction substantially orthogonal to the inserted pencil. It is arranged.
The second cutting blade 26 exposes the pencil lead 3 by cutting the taper portion 5 of the pencil 2 cut as shown in FIG. 7A from the middle portion toward the pencil lead 3. (See FIG. 7 (b)) and rotates relative to the pencil lead 3 with the cutting edge directed in a direction substantially orthogonal to the inserted pencil 2. The cutting edge of the second cutting edge 26 extends to a position where it can be exposed without damaging the pencil lead 3.

As described above, when the second cutting portion is configured, the tip of the taper portion 5 formed by the cutting by the first cutting portion is cut off so that the pencil core 3 is exposed from the ring portion 4. it can.
In the pencil scraper 1 of the present invention, in the present invention, the pencil introducing portions 13 and 23 directed to the inside from the pencil insertion ports 11 and 21 of the first and second brothers 2 are constituted by the cylindrical members 13a and 23a, and the cylindrical members 13a , 23a, and O-rings 18, 28 which are in sliding contact with the circumferential side surface of the pencil are fixed.

That is, the present invention makes it possible to rotate the pencil inserted into the case while pressing it against the cutting blades 16 and 26 with uniform inclination, and in the present embodiment, in particular, the pencil introducing portion The cylinder members 13a and 23a as 13 and 23 are rotatably fixed to the case 10 via the bearings 19 and 29, respectively.
As a result, when the cylindrical members 13a and 23a are rotated together with the pencils inserted into the pencil insertion holes 11 and 21, stable rotation is achieved centering around the pencil lead 3, and further, in the pencil introducing portions 13 and 23, Since the circumferential side surface of the pencil 2 is fixed by the O-rings 18, 28, it is possible to prevent the occurrence of tilting when the pencil is rotated. Therefore, it becomes possible to press a pencil with uniform inclination to cutting edges 16 and 26.

In order to fix the pencil 2 firmly to the cylindrical members 13a, 23a, the O-rings 18, 28 are preferably made of silicone rubber. Further, by using an elastic member having a hardness of about 50 degrees, the integrity of the cylindrical members 13a and 23a and the pencil 2 can be secured.
A bearing 19 for rotatably attaching the cylindrical members 13a and 23a is rotatably interposed between the inner holders 19a and 29a and the outer holders 19b and 29b.
Since the bearings 19 are interposed between the inner holders 19a and 29a pressed against the cylindrical members 13a and 23a and the outer holders 19b and 29b fixed to the case 10, smooth rotation is ensured.

The outer holders 19 b and 29 b of the bearing 19 are in pressure contact with the outer cylindrical members 13 b and 23 b fixed to the pencil introducing portions 13 and 23, and the cutting blade 16 fixed to the case 10 via the pencil holding portions 14 and 24. , 26 with a uniform inclination. By this, it becomes possible to rotate cylinder members 13a and 23a in the state which maintained centrality to pencil lead 3, and it becomes possible to cut a pencil into the shape of FIG.
The state of use of the pencil sharpener 1 will be described.
First, a pencil is inserted into the first pencil socket 11 and rotated. By rotating until coming into contact with the stopper 17, the peripheral side surface of the pencil is scraped off in an inclined manner, and the tapered portion 5 is formed at the tip (see FIG. 7A).

Thereafter, the pencil is taken out from the first pencil insertion opening 11 and inserted into the second pencil insertion opening 21. The pencil is rotated while being held by the second holding portion 24b, and the tip of the taper portion 5 is cut to expose the core tip (see FIG. 7B).
Before the pencil lead 3 appears, the step of sidewise cutting around the pencil is stopped, so the wooden body portion is not cut together with the pencil lead 3, and the body portion 2 and the pencil lead 3 There will be no drag during this time. Thereby, the adhesive between the main body 2 and the pencil lead 3 can be prevented from peeling off, and core breakage (inward bending) in the inside of the main body 6 can be prevented.

The pencil sharpener 1 according to the present embodiment has a long holding space (that is, the pencil introducing portions 13 and 23) between the pencil insertion holes 11 and 21 and the pencil holding portions 14 and 24, and is disposed in the holding space. The provided cylindrical members 13a and 23a are configured to be rotated together with a pencil, but the cylindrical members 13a 'and 23b' are fixed to the case 10 as in the pencil sharpener 1 'shown in FIG. , 23a 'may rotate the pencil.
The cylindrical members 13a 'and 23a' are fixed to the case 10 via the outer cylindrical members 13b 'and 23b'. O-ring 18 'which consists of a curved-shaped peripheral side is attached to the internal peripheral surface of cylinder member 13a', 23a '. The O-ring 18 'rotates the pencil 2 while being in sliding contact with the smooth curved surface while holding the pencil 2 inserted by elastic deformation.

The pencil 2 is rotated while sliding on the curved side of the O-ring 18 ′, so that the pencil 2 can be stably rotated about the pencil lead 3. Even when there is a variation in the thickness of the pencil 2, it is kept rotatable by the curved surface of the O-ring 18 ', so that the uniformity of the inclination with respect to the cutting edges 16, 26 can be maintained.
In the pencil sharpener 1 according to the present embodiment, the holding space from the pencil insertion ports 11 and 21 to the cutting blades 16 and 26 is lengthened, and the inner circumferential surface of the cylindrical members 13a and 23a disposed in the space portion is further extended. Since the O-rings 18 and 28 are attached, the pencil can be rotated in a stable state, and the cutting accuracy can be enhanced.

Next, a pencil sharpener 101 according to a second embodiment of the present invention will be described with reference to FIG. As shown in FIG. 10, this pencil sharpener 101 inserts a pencil from the pencil socket 11 provided on one side of the case 10 'toward the inside of the case, and is attached to the other side of the case 10' It holds the handle 30 and rotates the case 10 'in the manner of thread winding to scrape a pencil.
In this embodiment, a pencil can be cut into the shape shown in FIG. 2 by cutting at a single insertion port 11, and a pencil introducing portion formed of a cylindrical member 13a 'continuously to the brush insertion port 11. 13 'and a conical pencil holding portion 14' which is reduced in diameter.

In the pencil holding portion 14 ′, a slit 15 is provided along the inclined surface, and a first cutting edge 16 is provided along the slit 15. A second cutting edge 26 is provided at the tip of the first cutting edge 16. The second cutting blade 26 is disposed at a position closer to the pencil insertion port 11 than the tip of the first cutting blade 16.
The cutting edge of the second cutting blade 26 extends in a direction substantially orthogonal to the pencil as shown in FIG. 11 and cuts off the tip end of the taper portion 5 cut by the first cutting blade 16 to form a flat surface. And a tapered tapered portion 5 to form a core tip having a shape in which the pencil lead 3 is exposed from the center of the ring portion 4.

The other side of the case 10 'is an opening, and a lid member 31 is attached to the opening. The lid member 31 is composed of a main body for sealing the opening of the case 10 ′, an extension thereof, and a cylinder extending perpendicularly thereto, and the handle 30 is provided in the cylinder. It is rotatably mounted.
The tube portion extends toward the side opposite to the case 10, and becomes parallel to the pencil lead 3 at a predetermined distance M from the axis (the center of the pencil lead 3) of the pencil inserted into the pencil outlet. It is arranged as The handle 30 is attached to the inside of the cylindrical portion 34 with a play.

Also in the pencil scraper 101 of this embodiment, the pencil introducing portion 13 'from the pencil insertion port 11 to the pencil holding portion 14' is constituted by a cylindrical member 13a 'continuing to the pencil holding portion 14' In addition, O-rings 18 'which are in sliding contact with the peripheral side surface of the pencil are disposed at a plurality of places.
This makes it possible to rotate the pencil inserted into the case while pressing it against the cutting blades 16 and 26 with uniform inclination. In the state where the pencil is held by the O-rings 18 and 28 made of an elastic member, the rotation of the pencil is secured on the curved surface, so that the pencil does not tilt during cutting, and the thickness of the pencil varies. Even in this case, cutting defects are less likely to occur.

In the present embodiment, the second cutting blade 26 may be configured by the same member as the first cutting blade 16. In this case, as shown in FIG. 12, the front end of the first cutting portion 16 'in the rotational direction (L) is bent in the direction orthogonal to the pencil lead 3, and the second cutting edge 26' is bent at the bending portion. It may be configured.
In this case, as in the first modified example shown in FIG. 12 (a), the cutting edge of the second cutting edge 26 ′ may be provided continuously to the cutting edge of the first cutting edge 16 ′. As in the second modified example shown in b), the second cutting blade 26 ′ ′ bent and formed from the first cutting blade 16 ′ ′ is substantially in sliding contact with the circumferential side surface of the pencil lead 3 as it goes to the tip end portion It may be designed as

  The configuration of the second cutting edge 26 continuous with the first cutting edge 16 may be a spiral edge provided with a cutting edge at an inner diameter of an arc. In addition, when cutting by the first cutting edge 16 is stopped, the second cutting edge 25b may be automatically moved to a predetermined cutting position. In this case, as shown in FIG. 13, the stopper 17 ′ is vertically movably disposed at a position where the tip of the pencil before cutting is abutted. A gear 40 is provided on the side wall surface of the stopper 17 ', a gear 41 is attached to the gear 40, and an elevating member 43 for moving the second cutting blade 26 up and down via the gear 42 on one side of the gear 41 is provided. Provided.

  As the taper portion 5 is formed by the first cutting blade 16, the elevating member 43 ascends and interlocked therewith, the second cutting blade 26 is lowered to the cutting position. Then, the cutting by the second cutting blade 26 is stopped by contacting the upper wall surface of the case 10 ′. With this configuration, as the main body 6 is scraped in an inclined manner, the elevating member 43 can be lowered to start cutting by the second cutting blade 26. As a result, the pencil lead 3 is exposed simultaneously with the formation of the taper portion 5.

Next, a pencil sharpener 201 according to a third embodiment of the present invention will be described with reference to FIG.
This pencil sharpener 201 has a second cutting blade, a point that the handle 30 'is provided on the case 10''side, and a point that the lid member is constituted by the eraser 50, the pencil sharpener according to the second embodiment It is different from 101.
The pencil sharpener 201 sharpens the core, and a pencil lead-in portion 13 'consisting of a cylindrical member 13a' and a conical pencil holding portion whose diameter is reduced continuously to the pencil insertion port 11 And 14 '. In the pencil holding portion 14 ′, a slit 15 is provided along the inclined surface, and a first cutting blade 16 is attached along the slit 15.

The other side of the case 10 ′ ′ is provided with a locking projection 51 for attaching the eraser 50 as a lid member. A recess provided on the inner side surface of the erasing rubber 50 is fitted to the locking projection 51. And prevent the removal of the eraser.
Also in the pencil scraper 201 of this embodiment, the pencil introducing portion 13 'from the pencil insertion port 11 to the pencil holding portion 14' is constituted by a cylindrical member 13a 'continuing to the pencil holding portion 14' There are two O-rings 18 'which are in sliding contact with the peripheral side of the pencil.

In use, the eraser 50 as a lid member is removed and used (see FIG. 14).
By rotating the handle 30 in a state in which the pencil is inserted into the pencil insertion port 11, the pencil is slid on the curved surface while being held by the O-ring 18 'in the pencil introducing portion 13'. Also in the present embodiment, the pencil inserted into the case can be rotated while being pressed against the cutting blade 16 with uniform inclination, so that the pencil does not incline during cutting, and cutting defects occur. Can be prevented.

The pencil sharpener according to the present embodiment does not necessarily have to be a "pin-wound" pencil sharpener provided with a handle in the case, and is a "hand-held" pencil sharpener that sharpens a normal pencil by hand. It may be. Also in this case, by providing the O-ring 18 'having a curved cross-sectional shape in the pencil introducing portion 13', the variation in thickness of the pencil can be absorbed by the elastic deformation of the O-ring 18 '. Since the circumferential side surface of the pencil is rotated while being in sliding contact with the curved surface of the O-ring 18 ', it is possible to cut while maintaining a uniform inclination with respect to the cutting edge.
In addition, although this embodiment comprised the lid member by the eraser 50, you may comprise a lid member as a stamp. In any case, by forming the lid portion by the elastic member, the sealing to the pencil insertion port 11 can be made reliable.

  The present invention is not limited to a pencil as a writing instrument, but can be applied to a sharpener of a pencil-like member used in any industrial field, as long as it has a core material at the center of a long member. .

DESCRIPTION OF SYMBOLS 1 ... Pencil scraper 2 ... Pencil 3 ... Pencil core 4 ... Ring part 5 ... Tape part 6 ... Body part 10 ... Case 11 and 21 ... Pencil insertion slot 12 ... Scrap collection part 13, 23 ... Pencil introduction part 14 , 24 ... pencil holding portion 15 ... slit 16, 26 ... cutting blade 17 ... stopper 18, 28 ... O ring 19, 29 ... bearing 30 ... handle 40 ... gear 50 ... eraser

Claims (5)

  A pencil lead-in portion (13) directed to the inside from a pencil socket (11) provided on one side surface of the case (10), and a conical pencil holding portion (14) for reducing the diameter, wherein the pencil is held A pencil sharpener (1) configured by providing a cutting blade (16) along a slit (15) provided in a part (14), wherein the pencil introducing part (13) is formed by a cylinder member (13a) A pencil sharpener characterized in that an O-ring (18) pressed against the circumferential side surface of a pencil is fixed to the inner circumference of the cylindrical member (13a). The cylindrical member (13a) is rotatably fixed to the case (10) via a bearing (19),
The pencil member (2) is cut by rotating the cylinder member (13a) together with the pencil (2) inserted into the pencil inlet (11). The pencil sharpener according to claim 1. The cylindrical member (13a) is fixed to the case (10),
The pencil sharpener according to claim 1, wherein the pencil (2) is rotated and cut while being in sliding contact with the curved circumferential side surface of the O-ring (18). A ring portion (4) comprising a flat surface having an inner diameter (R) corresponding to the diameter of the pencil lead (3) and having an outer diameter (Y) smaller than the pencil diameter (X); and the ring portion (4) A continuous tape portion (5), and a main body portion (6)
A pencil sharpener (1) for producing a pencil (2) having a core portion (3) exposed from the ring portion (4),
A stopper (17) for stopping cutting before the core (3) of the held pencil (2) appears appears at the tip of the pencil holding portion (14),
The second pencil socket (21) into which the pencil (2) before the core (3) appears is disposed adjacent to the pencil socket (11),
A second pencil introducing portion (23) and a second pencil holding portion (24) are provided from the second pencil insertion port (21) toward the inside;
The second pencil holding portion (23) is provided with a second cutting blade (26) whose cutting edge extends in a direction substantially orthogonal to the inserted pencil (2);
4. The apparatus according to claim 1, wherein the second cutting blade (26) cuts the taper portion (5) to expose the core portion (3). Pencil sharpener. A ring portion (4) comprising a flat surface having an inner diameter (R) corresponding to the diameter of the pencil lead (3) and having an outer diameter (Y) smaller than the pencil diameter (X); and the ring portion (4) A body portion (6) comprising a taper portion (5) continuous to the circumferential side surface of the body portion (6);
A pencil sharpener (101) for producing a pencil (2) having a core portion (3) exposed from the ring portion (4);
In a direction substantially orthogonal to the pencil (2) at a position from the pencil insertion opening (11) to the tip of the cutting blade (16) provided on the inclined surface of the pencil holding part (14) A second cutting blade (26) having a cutting edge extending is provided, and the pencil (2) is rotated in a state where the pencil is inserted into the pencil insertion port (11), whereby the tape is cut by the cutting blade (16). A part (5) is formed, and the ring part (4) is formed by the second cutting blade (26), and the core tip (3) is exposed. The pencil sharpener according to claim 3.

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