JP3221162U - Pencil sharpener - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a pencil sharpener which can be sharpened lightly and is easy to carry. A handle attachment hole 23 for rotatably attaching the handle 3 inserted to the other side of the case from the direction opposite to the insertion direction of the pencil is parallel to the pencil inserted into the pencil insertion hole 2 Provided. The pencil can be shaved by holding the pencil with one hand and holding the handle 3 with the other hand and rotating the case in the manner of thread winding, so the pencil can be shaved lightly quickly without feeling tired. . In addition, since the pencil can be scraped in a fixed state, even a short pencil can be scraped easily. [Selected figure] Figure 2

Description

  The present invention relates to a small pencil sharpener that sharpens a pencil, and relates to a quick and light pencil sharpener.

As a small-sized pencil scraper, various types of structures having a structure in which a pencil is inserted into an insertion hole and scraped by hand have been proposed (Patent Document 1).
Such a pencil sharpener is provided with a conical core tip holding portion having a diameter decreasing toward the inside in the case, and a cutting blade is attached to a slit provided along the inclined surface of the core tip holding portion. By inserting and rotating a pencil into the core tip holding portion, the peripheral side surface of the pencil is obliquely pressed against the cutting blade and scraped, and the core tip of the central portion appears.
Japanese Examined Patent Publication No. 1-35760

However, since the user holds the case with one hand and turns while pressing the pencil with the other hand, it is necessary to rotate the pencil while applying pressure, which may cause fatigue.
Therefore, the present invention aims to provide a pencil sharpener that can be lightened quickly and lightly without being tired, and is convenient for carrying.

In order to solve the above problems, a pencil sharpener according to the present invention is a pencil sharpener that inserts a pencil from the pencil insertion hole provided on one side of the case toward the inside of the case and rotates the case to sharpen. A cylindrical portion provided in an extension of the other side surface of the case, with a handle mounting hole for rotatably attaching the handle inserted into the other side surface of the case from the direction opposite to the insertion direction of the pencil It is characterized in that it is provided in parallel with the pencil inserted into the pencil insertion hole.
In this case, an extension holder member attached to the rear end of the short pencil or a writing instrument may be removably attached as a handle member to the handle attachment hole.
In addition, by cutting a pencil in which a core material is disposed at the center of the main body portion, a ring portion having a flat surface whose outer diameter is smaller than the pencil diameter and a circumferential side surface from the ring portion A pencil sharpener for cutting into a shape having a continuous taper portion, and providing a slit along the inclined surface of the tip holding portion that reduces in diameter from the pencil insertion hole toward the inside of the case And a first cutting edge having a cutting edge along the slit, in a direction substantially orthogonal to the pencil at a position closer to the one side than the end on the other side of the first cutting edge A tapered second portion is formed by the first cutting blade, and a ring portion is formed by the second cutting blade by providing a second cutting blade extending and inserting a pencil into the pencil insertion hole and rotating it. It may be configured as follows.

According to the pencil sharpener according to the present invention, in the pencil sharpener which inserts and sharpens a pencil from the pencil insertion hole provided on one side of the case toward the inside of the case, a handle inserted from the opposite direction to the pencil insertion hole Since the handle mounting hole for rotatably attaching is provided parallel to the pencil, by holding the pencil with one hand and holding the handle with the other hand, rotate the case in the manner of thread winding, You can cut a pencil.
For this reason, it is possible to scrape the pencil happily without feeling tired as compared with the conventional pencil sharpener which needs to rotate the pencil itself while pressing the pencil against the cutting blade. In addition, since the pencil can be scraped in a fixed state, even a short pencil can be scraped easily.

FIG. 1 is a perspective view showing a pencil sharpener according to a first embodiment of the present invention. It is sectional drawing which shows the use condition of the said pencil sharpener. It is an exploded view of the said pencil sharpener, (a) is a main body member, (b) is a lid member, (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 making a core sharp, (b) shows the use condition when making a core sharp. It is the AA line arrow sectional view in the said 1st modification, (a) shows the example which made the core tip contact part detachable, (b) made position adjustment of the core 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 core point 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 shaved by the said 8th modification. The structure of the 1st cutting blade of the said modification and 2nd cutting blade 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 a mode which provided the 2nd cutting blade continuously to the 1st cutting blade, (b) is a mode which provided discontinuously. Show. It is a perspective view showing a pencil sharpener concerning a 2nd embodiment of the present invention. It is a sectional view of the above-mentioned pencil sharpener. It is sectional drawing which shows the modification of the said pencil sharpener. It is a perspective view showing a pencil sharpener concerning a 3rd embodiment of the present invention. It is a sectional view of the above-mentioned pencil sharpener. It is an explanatory view showing the state where it cuts the pencil with the above-mentioned pencil sharpener. It is an explanatory view showing a pencil sharpener concerning a 4th embodiment of the present invention. It is a front view which shows the Example of the said pencil sharpener.

  Preferred embodiments of the present invention will be described based on the attached drawings. Note that the embodiments of the present invention are not limited to the following embodiments, and other embodiments can be implemented as long as the problems of the present invention can be solved.

FIG. 1 is a perspective view of a pencil sharpener 1 according to a first embodiment of the present invention.
As shown in FIG. 2, this pencil sharpener 1 inserts a pencil from the pencil insertion hole 2 provided on one side of the case toward the inside of the case and holds the handle 3 attached to the other side of the case. The case is characterized in that the case is rotated in the manner of thread winding to scrape a pencil, and as shown in FIG. 3, it is constituted by the body member 10 of the case, the lid member 20, and the handle member 30. .

The main body member 10 of the case is configured by providing the core tip holding portion 11 in a bottomed and uncovered casing.
The core point holding portion 11 is a conical area whose diameter decreases from the pencil insertion hole 2 provided on one side surface 12 of the case toward the inside of the case, and a cutting blade is provided in a slit provided along the inclined surface. 13 is provided.
The peripheral side surface of the pencil inserted into the core tip holding portion 11 rotates while being obliquely pressed against the cutting blade 13 so that the pencil is cut in a tapered shape toward the central core portion. There is.

The other side surface portion of the case is configured by attaching a lid member 20 made of another member to the opening of the main body member 10.
The lid member 20 includes a main body 21 (i.e., the other side surface of the case), an extension 22 extending from the main body 21, and a cylinder 23 extending perpendicularly from the extension 22.
The cylindrical portion 23 is a portion for rotatably attaching the handle 3 inserted in the other side surface of the case from the direction opposite to the insertion direction of the pencil, and the inside functions as a handle attachment hole.

The cylindrical portion 23 extends toward the side (outside) opposite to the case, and is separated from the axis L of the pencil inserted in the pencil insertion hole 2 (that is, the axis of the tip holding portion 11) by a predetermined distance (M) At the same position as 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 used to turn the handle, but the operability when rotating the case in the manner of thread winding, When taking formality into consideration, 1 cm to 10 cm (preferably, 1.5 cm to 5 cm) is suitable. In this example, it is designed to be 2 cm.
The handle attachment portion 31 of the handle member 30 is inserted into the inside (that is, the handle attachment hole) of the cylindrical portion 23 of the lid member 20 in a state where a play is given.

The handle member 30 is a cap-like handle 3 provided with the handle attachment portion 31 inside, and at the tip of the handle attachment portion 31, a retaining portion 32 is provided.
The length (H) of the handle 3 is preferably such that it can be held by hand, and 2 cm to 10 cm (2.2 cm in this embodiment) is appropriate. The length (T) of the handle attachment portion 31 is 5 mm to 5 cm (1.4 cm in this embodiment).

The use condition of the pencil sharpener 1 of the said structure is demonstrated.
When scraping a pencil, the pencil is inserted into the inside of the case from the pencil insertion hole 2 provided on one side 12 of the case, the other hand holds the handle 3 and the case is rotated in the manner of thread winding.
The handle member 30 is inserted from the opposite direction to the pencil insertion direction, and since the handle member 30 is parallel to the pencil, the case is lightly applied as if it were pedaling the bicycle pedal. It can be rotated. With the rotation of the case, the relative rotation of the pencil in the pencil holding portion 11 causes the peripheral side surface to be scraped off in a tapered manner.

For this reason, compared with the conventional pencil sharpener which needed to rotate the pencil itself, pressing a pencil on a cutting blade, it is possible to sharpen a pencil without feeling tired.
In addition, since the handle 3 is rotated in a thread winding manner and scraped while the pencil is fixed, a short pencil can be scraped easily.

In the present embodiment, as shown in FIG. 4A, the core of the pencil held in the core tip holding unit 11 can be brought into contact with a predetermined position of the inner wall surface of the lid member 20 ′. The front contact portion 25 may be provided.
When the lid member 20 ′ is attached to the case main body member 10, the lead-end contact portion 25 becomes a lead-end having a desired thickness and a pencil which is scraped in a state of being held by the lead-end holding portion 11. It is designed to be in contact with

The lid member 20 'is configured to be removable, and as shown in FIG. 4 (b), the lid member 20' (or the main body member 10) is attached in the opposite direction so that the pencil tip of the pencil is not abutted. In other words, it is also possible to sharpen the core tip. Thereby, a pencil sharpener having a tip adjustment function is realized with a simple configuration.
Alternatively, only the lead tip contact portion 25 may be configured to be removable. When it is desired to sharpen the core tip, the core tip abutting portion 25 is removed and used.

Alternatively, as shown in FIG. 5, the core tip contact portion 25 ′ may be provided with an inclined portion so that position adjustment can be performed so as to be in contact with a desired core tip thickness.
As a method of position adjustment, it may be vertically inverted and attached, for example, as shown in FIG. 5 (b), a rail 26 may be provided and the position adjustment may be performed by sliding the lead tip contact portion 25 '. .

In the present embodiment, the shape of the case may be any shape, for example, a cylindrical shape (see FIG. 6).
The case may be transparent so that the pencil can be scraped while checking the tip condition of the core tip, and one side 12 provided with the pencil insertion hole 2 and the other side provided with the handle 3 ( A predetermined design may be applied to the case outer wall surface other than the lid portion). In this case, when rotated around an axis X located between the pencil insertion hole 2 and the handle mounting hole (cylindrical portion), each of the cases has a color different from the color so that a predetermined color appears. It is preferable to color the side of.

Further, the side surface can be divided into a plurality of regions, and different colors can be colored for each of the regions.
In the case of coloring, it is preferable to design the area of each area, the hue or lightness of the color, etc. according to the color mixing ratio in color, for example, the colors of red (blue, yellow The three primary colors such as green) may be colored. When the case is rotated, the colors of the respective areas are mixed, and the unexpected color can appear, so that the pencil can be removed happily.

Alternatively, the side surface of the case (the surface on which neither the pencil insertion hole 2 nor the handle 3 is provided) may be designed to have a continuous movement. In this way, it is possible to sharpen the pencil while having fun, as if watching an animation.
In addition, learning items such as 99 tables or periodic table of elements may be displayed, or as novelty goods, display for advertising may be added.

  Also, the handle member 30 may be removable. In this case, the handle attachment portion may be made of a member that can be elastically deformed, and the tip end retaining portion 32 may be allowed to pass through the handle attachment hole 23, or the pencil sharpener 1 ′ ′ shown in FIG. Thus, it may be made detachable by the writing tool fastener 34. By thus configuring the handle member 30 'with the writing tool, it is possible to reduce the number of writing tools to be carried.

Moreover, the cylinder part 23 as a handle attachment hole may be the structure extended toward the case side.
That is, as shown in FIG. 8, a cylindrical portion 23 ′ extending toward the case side (inside) is provided, and a rod-like member such as a pencil is inserted into this cylindrical portion 23 ′ and used as a handle member (handle attachment portion 31 ′ It may function as
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 the position separated by the predetermined distance (M).

Moreover, you may provide the pencil insertion hole 2 in lid member 20 '' like pencil sharpener 1 '' shown in FIG. That is, a slit is provided in the core tip holding portion 11 ′ ′ that reduces the diameter from the pencil insertion hole 2 toward the inside of the case, and the cutting blade 13 ′ ′ is attached along the slit to configure 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 22 ′ ′ along the surface. A cover 2 a for sealing the hole is attached to the pencil insertion hole 2.
Alternatively, as in a pencil sharpener shown in FIG. 10, the pencil insertion hole 2 and the core tip holding portion 11 ′ ′ may be provided in the main body 21 ′ ′ of the lid member 20 ′ ′. In this case, as shown in FIG. As shown, the body portion 21 'of the lid member 20 "is attached to the opening of the body member 10". When scraping a pencil, the cover 2b pivotally attached to the body portion 21 "is opened Thus, the pencil insertion hole 2 appears.
In this case, as shown in FIG. 11, a lead tip contact portion 25 to which the lead tip of the pencil held by the lead tip holding portion 11 ′ ′ can be brought into contact may be provided in the case on the other side. .

As shown in FIG. 12, the handle member 30 may be accommodated by providing a hinge 26 between the main body 21 ′ ′ of the lid member 20 and the extension 22 ′ ′ and bending the extension 22 ′ ′.
Further, as shown in FIG. 13, a slit 16 is provided along the inclined surface of the core tip holding portion 11 ′ ′, and along the slit 16, a first cutting edge 17a whose cutting edge extends in an inclined shape is provided, It is good also as a two-edged blade structure which provided the 2nd cutting blade 17b extended in the direction substantially orthogonal to a pencil in the position which turned to the pencil insertion hole 2 side rather than the tip part.
This pencil sharpener 1 ′ ′ is provided as a tool for cutting the core of a pencil 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. Provided as a container 1 ''.

  In such a pencil, the tip of the main body 5 made of wood or the like is cut into a trapezoidal shape in cross section including the ring 7 and the taper 8, and the core tip 6 ′ is opened from the opening of the ring 7. Exposed cutting shapes are suitable. That is, the tip 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 6 and having an outer diameter Y smaller than the pencil diameter X The tapered portion 8 is continuously provided in an inclined manner from the outer periphery of the ring portion 7 toward the peripheral side surface of the main body portion 5.

The first cutting edge 17 a for cutting the main body 5 of the pencil in an inclined manner is disposed in an inclined manner along the slit of the core tip holding portion 11. A core tip contact portion 25 is provided at the end in the diameter reducing direction, and 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 edge 17 b whose cutting edge extends in a direction substantially orthogonal to the inserted pencil is provided at a position near the lead insertion portion 2 toward the side of the pencil insertion hole 2.

  As shown in FIG. 15, the second cutting blade 17b is for cutting out the tip of the portion which is cut in an inclined manner by the first cutting blade 17a to expose the core 6 ' It is designed to be cut in a direction substantially orthogonal to the longitudinal direction from the center to the center. In this case, as shown in FIG. 16, it may have an arc-shaped 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 so as to abut (or approach as closely as possible) the core material 6 toward the tip end portion 17b' of the blade edge. It becomes possible.
The second cutting edge 17b may be provided continuously to the tip of the first cutting edge 17a in the rotational direction. For example, as shown in FIG. 17, the tip of the first cutting edge 17a 'is bent in the direction orthogonal to the core member 6, and the second cutting edge 17b' is formed at the bent portion. In this case, the second cutting blade 17b 'is rotated from the first cutting blade 17a' so that cutting by the second cutting blade 17b 'is performed after cutting by the first cutting blade 17a'. It is preferable to design so as to be bent toward the tip and to be brought into approximate sliding contact with the circumferential side surface of the core 6 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. In addition, the description is abbreviate | omitted by attaching the same code | symbol to the member of the structure same as the thing of 1st Embodiment.
The pencil sharpener 100 according to the present embodiment is, as shown in FIG. 19, a pencil sharpener that 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. In the above, the handle attachment hole is provided on the other side of the case.

That is, although the pencil sharpener 100 of this embodiment is comprised by the case main body member 10, the cover member 120, and the handle member 30, the extension member is not provided in the cover member 120, but the main body member 10 is provided. The second embodiment differs from the first embodiment in that only the opening of the second embodiment is covered.
The lid main body 121 as the other side face of the case is provided with a cylindrical portion 123 for rotatably attaching the handle member 30 from the direction opposite to the direction in which the pencil is inserted. The cylindrical portion 123 is parallel to the pencil at a position separated by a predetermined distance (M).
The handle attachment portion 31 of the handle member 30 is inserted into the inside (that is, the handle attachment hole) of the cylindrical portion 123 of the lid member 120 in a state where a play is given.

Also in the pencil sharpener 100 of the above configuration, as in the pencil sharpener according to the first embodiment, a pencil is inserted into the inside of the case from the pencil insertion hole 2 provided on one side 12 of the case, and the other hand is a grip By holding the 3 and rotating the case in the manner of thread winding, the pencil can be shaved.
The handle member 30 in the present embodiment is not provided at the extension of the lid member 120, and needs to be turned in a small turn, but it is convenient for carrying because it is low in bulk.
Also in the present embodiment, by making the handle member 30 removable, it is possible to further reduce the bulk when housed in a brush case or the like.

Also in this case, the handle member 30 may be a writing instrument or, as shown in FIG. 20, may be an extension holder 135 used by being attached to the rear end of a short pencil. The inside of the extension holder 135 is a holder portion 136 for holding a pencil, and functions as a retaining portion a fastener 137 for fixing the inserted pencil. 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 even to one side part of a case, a handle member can also be attached, without opening a cover member.

Next, the configuration of a pencil sharpener 200 according to a third embodiment of the present invention will be described with reference to FIGS. 21 and 22. FIG. In addition, the description is abbreviate | omitted by attaching the same code | symbol to the member of the structure same as the thing of 1st Embodiment.
The pencil sharpener 200 according to the present embodiment has a handle attachment hole, and a insertion hole 238 of 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 only the member 220 is used.

The lid member 220 is provided with a handle insertion hole 238, into which a member similar to the handle (for example, a writing instrument or the like) is inserted, as shown in FIG. Then, by rotating the case in the manner of thread winding, it is possible to scrape a pencil.
Since there is no need to provide a handle member, miniaturization of the pencil sharpener can be achieved.
Since the case 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 a fourth embodiment of the present invention will be described with reference to FIG.
The case of the pencil sharpener 300 is constituted by a 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 core tip holding portion 311 whose diameter decreases from the pencil insertion hole 2 toward the inside of the case, and attaching the 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 when rotating the pencil while pressing it against the cutting blade 313, and can cut the pencil in a natural posture It is set to-170 degrees, more preferably 130 degrees-150). In the embodiment shown in FIG. 25, by designing the bending angle (θ) to 140 degrees, the pressing force when pressing the pencil against the cutting blade becomes high, and the pencil can be shaved without feeling fatigue. The

The interior of the body member 310 is continuous with the opening of the handle member 330.
That is, the front end (i.e., the other side surface) of the main body member 310 is opened, and sealed at the handle member 330 which forms a bottomed open cylindrical member. The handle 3 is formed on the outer wall surface of the handle member 330.
In use, one hand holds the pencil, the other hand holds the handle 3 with the other hand, and rotates the pencil.
Since the handle member 330 has both the function of sealing the main body member 310 and the function as an accommodation portion for cutting waste discharged through the slits of the main body member 310, the shape can be made compact.

  In particular, since the handle 3 for pressing and supporting the other side of the case from the direction opposite to the insertion direction of the pencil is provided at an obtuse angle with the pencil, when holding the handle and rotating the pencil You can maintain a natural attitude. In addition, since the pencil can be pressed against the cutting blade without difficulty, the pencil can be shaved without feeling tired.

  The present invention is not limited to the industry field of office supplies for sharpening writing instruments, but it is a field of cosmetics as a pencil sharpener for sharpening eye pencils, and an architectural field as a pencil sharpener for sharpening rod members to produce scissors and the like. The present invention can be applied to an apparatus for sharpening a long object in any industrial field.

1, 100, 200, 300 ... pencil sharpener 2 ... pencil insertion hole 3 ... handle 10, 310 ... body member 11, 311 ... core tip holding portion 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 part 22 ... extension part 23, 123 ... tubular portion 25 ... nib abutment 26 ... rails 30 ... handle member 31 ... handle attaching portion 32 ... retaining portion 30, 130, 330 ... handle member 133 ... writing instrument main body 134 ... cap 135 ... extension holder 136 ... holder portion 137 ... fastener 138, 238 ... insertion hole

Claims (3)

A pencil sharpener that inserts a pencil from the pencil insertion hole (2) provided on one side surface (12) of the case into the inside of the case and rotates the case to scrape,
A handle mounting hole for rotatably attaching the handle (3) inserted to the other side of the case from the direction opposite to the direction in which the pencil is inserted, and a cylinder provided in the extension of the other side of the case (23) A pencil scraper provided parallel to a pencil inserted into the pencil insertion hole (2) as (23).   The pencil sharpener according to claim 1, characterized in that an extension holder member attached to the rear end of a short pencil or a writing instrument is detachably attached to the handle attachment hole as a handle member (30). By cutting a pencil in which the core member (6) is disposed at the center of the main body (5), a ring portion (a flat surface having an outer diameter smaller than the diameter of the pencil) at the tip of the main body (5) 7) A pencil sharpener for cutting into a shape having 7) and a taper portion (8) continuous from the ring portion (7) to the circumferential side,
A first cutting blade (17a) is provided with a slit along the inclined surface of the core 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 Set up
A second cutting blade (17b) extending in a direction substantially orthogonal to the pencil is provided at a position closer to the one side surface than the end on the other side surface of the first cutting blade (17a);
By inserting a pencil into the pencil insertion hole (2) and rotating it, the first cutting blade (17a) forms the tapered portion (8), and the second cutting blade (17b) forms a ring ( The pencil sharpener according to claim 1 or 2, characterized in that 7) is formed.

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