JP7055290B2 - Pencil sharpener - Google Patents

Description

The present invention relates to a small pencil sharpener in which a pencil is inserted and rotated to sharpen.

As a small pencil sharpener, a slit was provided in a conical holding portion whose diameter was reduced from the pencil insertion port provided on one side of the case toward the inside of the case, and a cutting blade was provided along the slit. The structure is generally used (see Patent Document 1).
In such a pencil sharpener, a pencil is inserted from the pencil insertion slot toward the inside of the case, a handle attached to the other side of the case is held, and the case itself is rotated in the manner of a pincushion to sharpen the pencil. The one has been proposed (see Patent Document 2).

Japanese Unexamined Patent Publication No. 2015-83355 Design No. 1543284 Gazette

However, the pencil sharpener has a problem that it is easy to sharpen a pencil while it is long, but it becomes difficult to sharpen it as it becomes shorter. Also, when I tried to put it in the pencil case, it was bulky and I had to give up putting other things in some cases. Further, when carrying a pencil sharpener, there is a problem that cutting chips spill from the pencil insertion slot.
Therefore, an object of the present invention is to provide a pencil sharpener that is easy to sharpen even with a short pencil and is convenient to carry.

In order to solve the above problems, the present invention is provided with a pencil introduction portion toward the inside of the case from the pencil insertion slot and a conical tip holding portion having a reduced diameter, which is provided in the tip holding portion. A cutting blade is provided along the slit, and a handle that can be attached to the inside of the case from the direction opposite to the pencil insertion slot is provided so as to be parallel to the pencil inserted into the pencil insertion slot. It is a configured pencil sharpener, and the cap that covers the pencil insertion slot is made of a rubber member, and inside the cap, a recess for holding the rear end of the pencil and toward the outside of the case. A recess into which the protruding pencil insertion port is inserted is provided, and a cap holding portion designed to have substantially the same shape as the rear end of the pencil is projected in the vicinity of the pencil insertion slot to form the recess. The inner circumference of the pencil introduction part from the pencil insertion port to the tip holding part absorbs the variation in the thickness of the pencil by elastic deformation and keeps a uniform inclination with respect to the cutting blade. It is characterized in that an O-ring composed of a curved surface having a smoothness capable of guiding the pencil by rubbing the peripheral side surface in a state is provided .

It is a pencil sharpener configured to include a plurality of the caps having a stamp portion on the surface portion, and the cap holding portion may be inserted into the recess so that a desired cap can be replaced and used.

In the pencil sharpener according to claim 1, since the cap covering the pencil insertion slot is made of a rubber member, it is possible to prevent cutting chips from spilling from the pencil insertion slot through the slit .

In particular , the handle that can be attached to the inside of the case from the direction opposite to the pencil insertion slot is provided so that it is parallel to the pencil that is inserted into the pencil insertion slot, so you can hold the pencil with one hand and the other. You can happily sharpen a pencil by holding the handle with your hand and rotating the case in the same way as a thread winding.
When sharpening a short pencil, the cap can function as a handle by inserting the rear end into the recess inside the cap. This allows a short pencil to be sharpened quickly and easily.
In addition, the pencil introduction part from the pencil insertion port to the tip holding part is configured in a cylindrical shape, and an O-ring that is pressed against the peripheral side surface of the pencil is fixed to the inner circumference of the cylinder, so that when the pencil is rotated, it is fixed. It is possible to prevent the tilt from occurring. As a result, the pencil inserted in the case can be rotated while being pressed against the cutting blade at a uniform inclination, and the occurrence of cutting defects can be reduced.

It is a perspective view which shows the pencil sharpener which concerns on 1st Embodiment of this invention. It is a front view of the said pencil sharpener. It is a right side view of the above pencil sharpener. It is a left side view of the above pencil sharpener. It is a top view of the said pencil sharpener. It is a bottom view of the above-mentioned pencil sharpener. It is a perspective view which shows the use state of the said pencil sharpener. It is sectional drawing which shows the internal structure of the case of the said pencil sharpener. It is a front view which shows the use state as a hanging decoration of a key chain. It is a left side view which shows an example of the design of a stamp part. It is sectional drawing which shows the use state when sharpening a short pencil. It is sectional drawing which shows the 1st modification of the said pencil sharpener. It is sectional drawing which shows the 2nd modification of the said pencil sharpener. It is sectional drawing which shows the use state of the said 2nd modification. It is sectional drawing which shows the use state of the said 2nd modification at the time of sharpening a short pencil. It is sectional drawing which shows the pencil sharpener which concerns on 2nd Embodiment of this invention. It is a perspective view which shows the state which the cap member of the pencil sharpener is removed. It is a perspective view which shows the shape of the pencil sharpened by the said pencil sharpener. It is an exploded view of the said pencil sharpener. It is a perspective view which shows the state which the pencil is cut by the said pencil sharpener. It is sectional drawing which shows the use state of the said pencil sharpener. It is sectional drawing which shows the modification of the said pencil sharpener.

Preferred embodiments of the present invention will be described with reference to the accompanying drawings. The present invention is applied to a pencil sharpener having a structure in which a pencil is inserted and rotated to be sharpened by a cutting blade arranged in an inclined shape in a case, and an example of the embodiment is shown below.

FIG. 1 is a perspective view of a pencil sharpener 1 according to the first embodiment of the present invention. 2, FIG. 3, FIG. 4, FIG. 5, and FIG. 6 are a front view, a right side view, a left side view, a plan view, and a bottom view, respectively.
The pencil sharpener 1 is composed of a case main body 10, a side member 20 of the case, a cap member 30, and a handle member 40, and as shown in FIG. 7, a pencil insertion provided on the side surface of the case is inserted. The structure is such that a pencil is inserted from the mouth 21 toward the inside of the case, the handle 41 is held, and the case is rotated in the manner of a pincushion to sharpen the pencil.

One side of the case body 10 is open, to which the side member 20 of the case is attached. The other side portion of the case body 10 extends in a direction along the side surface, and a handle mounting portion 12 for mounting the handle 40 is formed on the extension portion 11 (see FIG. 8).
The side surface member 20 attached to the side surface of the case is composed of a pencil insertion port 21, a cap holding portion 22, a pencil introducing portion 23, and a core tip holding portion 24.

The pencil insertion slot 21 is a tubular portion into which a pencil is inserted, and has a shape protruding toward the outside of the case so that the cap can be held at the opening edge portion thereof. A cap holding portion 22 for attaching a cap is projected in the vicinity of the pencil insertion port 21.
The cap holding portion 22 is a convex portion provided for fixing the cap portion 30 together with the opening edge portion of the pencil insertion port 21, and is projected toward the outside of the case for a predetermined length to extend the rear end of the pencil. It is designed to have almost the same shape as the part.

A pencil introduction portion 23 and a core tip holding portion 24 are formed from the pencil insertion port 21 toward the inside of the case. That is, inside the side surface portion of the case, a cylindrical pencil introduction portion 23 continuous from the pencil insertion port 21 and a conical core tip holding portion 24 having a reduced diameter are provided.
An O-ring 28 made of a smooth curved surface is arranged on the inner circumference of the pencil introduction portion 23. By rotating the pencil while being in sliding contact with the curved surface of the O-ring 28, rattling during pencil cutting can be prevented.

The tip holding portion 24 is continuously provided on the pencil introduction portion 23. The tip holding portion 24 is a conical portion for holding the tip of the pencil. A slit 25 is provided along the inclined surface, and a cutting blade 26 is attached along the slit 25.
With this configuration, the peripheral side surface of the pencil rotates while being pressed against the inclined surface, so that the pencil is scraped in an inclined shape.
A mounting hole 60 for use as a key chain is provided at the upper end of the side surface member 20, and by attaching a desired strap, it can be used as a hanging decoration for the key chain (see FIG. 9). ..

A cap member 30 for covering the pencil insertion port 21 is detachably attached to the pencil insertion port 21 and the cap holding portion 22 protruding toward the outside of the case.
The cap member 30 is locked at the locking portion 29 of the side member in a state of being inserted into the pencil insertion slot 21 and the cap holding portion 22. The cap member 30 is made of an eraser material and also has a function as an eraser.

Two recesses (31, 32) are formed inside the cap member 30. The first recess is an insertion slot holding portion 31 for holding the pencil insertion slot 21. The insertion port holding portion 31 is designed to have substantially the same diameter as the outer diameter of the pencil insertion port 21 so that the cap member 30 can be firmly attached.

The second recess (32) is a recess 32 into which the cap holding portion 22 of the side member 20 is inserted, and is designed to have a diameter slightly smaller than that of the insertion port holding portion 31. The recess 32 is designed to have a shape corresponding to the diameter of the pencil so that the rear end of the pencil can be inserted. That is, it is designed so that the pencil can be inserted by the elastic force of the eraser material and the pencil can be firmly held by the contraction force.
The surface of the cap member 30 is a stamp portion 33 for imprinting a predetermined shape (see FIG. 10).

A handle portion 40 is attached to the other side portion of the case body portion 10.
The handle portion 40 is rotatably attached to a handle mounting portion 12 provided on the extension portion 11 of the case body 10 (see FIG. 8). That is, the other side portion of the case main body portion 10 extends in the direction along the side surface, and the handle mounting portion 12 is formed on the extension portion 11.

The handle mounting portion 12 is a tubular portion for mounting the handle 40 from a direction opposite to the pencil insertion direction, and the inside functions as a handle mounting hole. This tubular portion extends in a right-angled direction toward the opposite side (outside) of the case 10, and becomes parallel at a position separated from the inserted pencil by a predetermined distance (M).
The mounting portion 41 of the handle member 40 is inserted into the handle mounting portion 12 with play.

The handle member 40 is a cap-shaped handle having a mounting portion 41 inside, and a retaining portion 42 is formed at the tip of the mounting portion 41.
The length (T) of the handle is preferably a length that can be grasped by hand, and is preferably 2 cm to 10 cm (2.2 cm in this embodiment). The appropriate length of the case (main body and side surface) is (H) 2 cm to 10 cm (3 cm in this example), and the length (K) of the cap 30 is 2 cm to 10 cm (2.2 cm in this example). Is appropriate.

Hereinafter, the usage state of the pencil sharpener 1 according to the present invention will be described.
When sharpening a pencil, the cap member 30 is removed and used. In this case, a pencil is inserted into the pencil insertion slot 21 and the handle member 40 is rotated in the same manner as a pincushion. The pencil is shaved in an inclined manner by the cutting blade 27, and the tip portion thereof comes into contact with the stopper 17 provided on the case body 10, so that the cutting is completed.
When sharpening a short pencil, the rear end of the pencil is inserted into the second recess 32 of the cap member 40, as shown in FIG.

Since the cap member 40 is composed of an eraser member and the second recess 32 inside the cap member 40 is designed according to the diameter of the pencil, the pencil can be firmly held by its elastic force. By making the cap member 40 function as a handle, it is possible to hold the handle with each of the left and right hands and rotate the pencil in the manner of a pincushion.

The inserted pencil rotates while sliding on the curved surface of the O-ring 28 arranged in the pencil introduction portion 23. The elastic deformation of the O-ring 28 can absorb variations in the thickness of the pencil, and the peripheral side surface of the pencil rotates while being guided by the curved surface of the O-ring 28, so that a uniform inclination with respect to the cutting blade is maintained. It can be cut in a state of being.
As a result, the pencil can be cut beautifully, and even a short pencil can be easily cut, and the pencil can be used to the end without waste.

When this pencil sharpener 1 functions as an eraser, it is used with the cap member 30 attached. At this time, since the convex portion of the side member 20 (that is, the pencil insertion port 21 and the cap mounting portion 22) is held in each of the two recesses (31, 32) inside the cap member 30, let's erase it. The cap member 30 does not come off when rubbed against the portion to be used.

Since the pencil sharpener 1 has a function as an eraser, there is no need to prepare an eraser separately, and the pencil case does not become bulky.
When used as a stamp, ink is applied to the stamp portion 33 provided on the cap member 30 and stamped.
In this embodiment, the O-ring 28 is provided in the pencil introduction portion 23, but the O-ring 28 is not always necessary (see FIG. 12).

Further, as shown in FIG. 13, the pencil sharpener of the present invention is provided with a pencil insertion slot 21', a pencil introduction portion 23', and a core tip holding portion 24'on the case body 10', and is provided on the other side of the case. The structure may be such that the handle member 40 is attached to the provided lid member 50.
From the pencil insertion slot 21'provided on one side of the case body 10', a cylindrical pencil introduction portion 23'and a conical tip holding portion 24'are provided. A slit 25'is provided along the inclined surface of the tip holding portion 24', and a cutting blade 26'is attached along the slit 25'.

The other side of the case body 10'is opened, and the lid member 50 is attached to the opening.
A stopper 17 is provided on the inside of the lid member 50 to prevent over-shaving of the core tip. The outer surface of the lid member 50 is extended, and the handle mounting portion 52 is formed in the right angle direction on the extension portion 51. Will be done. The handle member 40 is rotatably attached to the handle attachment portion 52.

A cap member 30'is attached to one side of the case body 10'(the side surface on the side where the pencil insertion slot 21' is provided).
The cap member 30'is composed of an eraser member, and a recess 32'in which the rear end portion of the pencil can be inserted is provided inside. The outer side surface functions as a stamp portion 33'. Cap members 30'with various stamp patterns may be prepared so that a desired cap member 30'can be selected.

When sharpening a pencil, as shown in FIG. 14, the cap member 30'is removed, the pencil is inserted into the pencil insertion slot 21', and the pencil is rotated in the manner of a pincushion.
When sharpening a short pencil, as shown in FIG. 15, it is used with the rear end of the pencil inserted into the recess 32'of the cap member 30'. This makes it easy to rotate even a short pencil.
The pencil sharpener of the present invention does not necessarily have to be a "pincushion type" pencil sharpener with a handle on the case, even if it is a "hand-cranked" pencil sharpener that sharpens by turning a normal pencil by hand. good.

Next, the pencil sharpener 101 according to the second embodiment of the present invention will be described with reference to FIG. This pencil sharpener has two cutting portions, and as shown in FIG. 17, has two pencil insertion ports 111 and 121.
The pencil sharpener 101 is for cutting the pencil 2 into the shape shown in FIG. This shape is suitable as a cutting shape for colored pencils and cosmetic pencils, which are often provided as pre-cut pencils, and has an inner diameter corresponding to the diameter of the pencil lead 3 and is flat with an outer diameter smaller than the pencil diameter. It has a shape that is continuous with the peripheral side surface of the main body 6 through the ring portion 4 made of a surface and the inclined taper portion 5 from the ring portion 4.

In order to cut a pencil into such a shape, the pencil sharpener 101 according to the present embodiment is provided with two pencil insertion openings 111 and 121 on one side surface of the case 110 and a waste collecting unit 112 on the other side. Structure.
One pencil insertion port 111 is a first pencil insertion port 111 for cutting the main body portion 6 in an inclined shape, and a second pencil insertion port 121 adjacent thereto is cut in an inclined shape. This is an insertion port for cutting the taper portion 5 in a direction orthogonal to the pencil lead 3 (see FIG. 19).

The first cutting portion arranged on the extension of the first pencil insertion slot 111 is a portion for cutting the main body portion 6 of the pencil in an inclined shape, and is inside from the first pencil insertion slot 111. It is configured to include a pencil introduction portion 113 toward the direction of the pencil, and a conical tip holding portion 114 having a reduced diameter.
The tip holding portion 114 is provided with a slit 115, and the cutting blade 116 is arranged in an inclined shape along the slit 115. At the tip of the tip holding portion 114, a stopper 117 for stopping cutting before the held pencil lead appears is arranged.

With this configuration, the pencil inserted in the first pencil insertion slot 11 is rotated to cut the main body 6 in an inclined manner, and the cutting is stopped just before the pencil lead 3 appears. be able to.
That is, since the pencil lead 3 can be prevented from being scraped at the same time as the wooden main body 6, it is possible to prevent the adhesive material between the pencil lead 3 and the main body 6 from peeling off, and the inside of the pencil lead 3 can be prevented from peeling off. It is possible to effectively prevent breakage.

From the second pencil insertion slot 121 arranged adjacent to the first pencil insertion slot 111, a pencil introduction portion 123 is provided toward the inside, and a tip holding portion 124 is formed at the tip thereof. ..
The core tip holding portion 124 has the shape of a truncated cone with a reduced diameter, and a second cutting blade 126 whose cutting edge extends in a direction substantially orthogonal to the inserted pencil is arranged at the tip portion thereof.
The second cutting blade 126 exposes the pencil lead 3 by cutting the taper portion 5 of the pencil 2 from the intermediate portion toward the pencil lead 3, with respect to the inserted pencil 2. With the cutting edge facing in a substantially orthogonal direction, the pencil lead 3 is relatively rotated. The cutting edge of the second cutting blade 126 extends to a position where the pencil lead 3 can be exposed without damaging it.

When the second cutting portion is configured in this way, the tip of the tapered portion 5 formed by cutting by the first cutting portion can be cut off so that the pencil lead 3 is exposed from the ring portion 4 (the pencil lead 3 can be exposed from the ring portion 4). See FIG. 20).
In such a pencil sharpener 101, the pencil introduction portions 113 and 123 facing inward from the pencil insertion ports 111 and 121 of the first and younger brother 2 are composed of the cylinder members 113a and 123a, and among the cylinder members 113a and 123a. O-rings 118 and 128, which are slidably contacted with the peripheral side surface of the pencil, were fixed to the circumference.

Then, the tubular members 113a and 123a as the pencil introduction portions 113 and 123 were rotatably fixed to the case 110 via the bearings 119 and 129. As a result, when the cylinder members 113a and 123a are rotated together with the pencils inserted into the pencil insertion ports 111 and 121, stable rotation is achieved around the pencil core 3, and further, in the pencil introduction portions 113 and 123, Since the peripheral side surface of the pencil 2 is fixed by the O-rings 118 and 128, it is possible to prevent the pencil from being tilted when it is rotated. Therefore, the pencil can be pressed against the cutting blades 116 and 126 with a uniform inclination.

Since the bearing 119 is interposed between the inner holders 119a and 129a that are pressed against the tubular members 113a and 123a and the outer holders 119b and 129b that are fixed to the case 110, smooth rotation is ensured.
The outer holders 119b and 129b of the bearing 119 are pressed against the outer cylinder members 113b and 123b fixed to the pencil introduction portions 113 and 123, and the cutting blade fixed to the case 110 via the core tip holding portions 114 and 124. It is possible to press-contact 116 and 126 with a uniform inclination. This makes it possible to rotate the tubular members 113a and 123a while maintaining the centrality of the pencil lead 3.

Also in the pencil sharpener 101 of this embodiment, a cap member 130 made of an eraser member is attached to one side portion (side surface portion on the side where the pencil insertion ports 111 and 121 are provided) of the case body 110. The inside of the cap member 130 is provided with a recess 132 into which the rear end of the pencil can be inserted.
The usage state of the pencil sharpener 101 will be described.
First, as shown in FIG. 21, the rear end portion of the pencil is inserted into the recess 132 of the cap member 130.

Then, the rear end portion of the pencil is inserted into the recess 132 of the cap member 130, and in that state, the pencil is inserted into the first pencil insertion slot 11 and rotated. By rotating the pencil until it comes into contact with the stopper 17, the peripheral side surface of the pencil is scraped off in an inclined shape, and the taper portion 5 is formed at the tip (see FIG. 20A).
After that, the pencil is taken out from the first pencil insertion slot 111 and inserted into the second pencil insertion slot 121. The pencil is rotated while being held by the second holding portion 124b, and the tip of the taper portion 5 is cut off to expose the tip of the core (see FIG. 20 (b)).

Before the pencil lead 3 appears, the process of laterally shaving around the pencil is stopped, so that the wooden main body is not cut together with the pencil lead 3, and the main body 2 and the pencil lead 3 are combined. No drag is generated during this period. As a result, it is possible to prevent the adhesive material between the main body portion 2 and the pencil lead 3 from peeling off, and it is possible to prevent the core breakage (center breakage) inside the main body portion 6.

The pencil sharpener 101 according to the present embodiment is provided with a long holding space (that is, pencil introduction portions 113, 123) between the pencil insertion ports 111 and 121 and the tip holding portions 114 and 124, and the holding space is provided with a long holding space. The arranged tubular members 113a and 123a are configured to be rotated together with the pencil, but the tubular members 113a and 123b'are fixed to the case 110 and the tubular members 113a are fixed as in the pencil sharpener 101'shown in FIG. 22. You may try to rotate the pencil in', 123a'.

The tubular members 113a'and 123a' are fixed to the case 110 via the outer tubular members 113b'and 123b'. An O-ring 118'which is a curved peripheral side surface is attached to the inner peripheral surfaces of the tubular members 113a'and 123a'. The O-ring 118'rotates the pencil 2 while holding the pencil 2 inserted by elastic deformation and sliding against the smooth curved surface.

Since the pencil 2 rotates on the curved surface of the O-ring 118'while sliding its peripheral side surface, it can be stably rotated around the pencil core 3. Even if the thickness of the pencil 2 varies, it is maintained in a rotatable state by the curved surface of the O-ring 118', so that the uniformity of inclination with respect to the cutting blades 116 and 126 can be maintained.
In this embodiment as well, a stamp portion may be provided on the surface of the cap member 130.

The present invention is not limited to pencils as writing instruments, but is applicable to pencil-shaped member sharpeners used in all industrial fields as long as they sharpen a structure having a core material in the center of a long member. be able to.

1, 101 ... Pencil sharpener 2 ... Pencil 3 ... Pencil core 4 ... Ring part 5 ... Tape part 6 ... Main body part 10, 110 ... Case body 11 ... Extension part 12 ... Handle mounting part 17 ... Stopper 20 ... Side member 21, 111 ... Pencil insertion port 22 ... Cap holding part 23, 113 ... Pencil introduction part 24, 114 ... Lead tip holding part 25, 115 ... Slit 26, 116 ... Cutting blade 28, 118 ... O-ring 29 ... Locking part 30, 130 ... Cap member 31 ... Insertion holding part 32, 132 ... Recessed portion 33, 133 ... Stamp part 40 ... Handle member 41 ... Mounting part 42 ... Retaining part 50 ... Lid member 60 ... Key holder mounting hole

Claims (2)

A pencil introduction portion (23) extending from the pencil insertion port (21) to the inside of the case (10) and a conical tip holding portion (24) having a reduced diameter are provided, and the tip holding portion (24) is provided. A cutting blade (26) is provided along the slit (25) provided in the pencil, and a handle (40) attached to the inside of the case (10) from the direction opposite to the pencil insertion slot (21). , A pencil sharpener (1) configured to be parallel to the pencil inserted into the pencil insertion slot (21).
The cap (30) that covers the pencil insertion slot (21) is made of a rubber member, and inside the cap (30), a recess (32) for holding the rear end of the pencil and a case (10). A recess (31) into which the pencil insertion port (21) projecting toward the outside of the pencil is inserted, and a cap holding portion (22) designed to have substantially the same shape as the rear end of the pencil. Protruding in the vicinity of the pencil insertion port (21) so that it can be inserted into the recess (32).
The inner circumference of the pencil introduction portion (23) from the pencil insertion port (21) toward the tip holding portion (24) absorbs variations in the thickness of the pencil by elastic deformation and has a uniform inclination with respect to the cutting blade. A pencil sharpener characterized in that an O-ring (28) composed of a curved surface having a smoothness capable of guiding the pencil by rubbing the peripheral side surface while maintaining the pencil sharpener is provided. A pencil sharpener configured to include a plurality of the caps having a stamp portion (33) on the surface portion.
The pencil sharpener according to claim 1, wherein the cap holding portion (22) is inserted into the recess (32) so that a desired cap can be replaced and used .

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