JP2014058120A5 - - Google Patents

Description

Writing instrument with eraser

  The present invention relates to a writing instrument provided with an erasing member, and more particularly, to a writing instrument including an erasing member that erases the color by rubbing the handwriting with thermochromic ink.

  It is well known that a handwriting drawn on a paper surface or the like by a writing instrument such as a pencil with an eraser can be erased by an erasing member provided in the writing instrument. In particular, in a thermochromic writing instrument that contains thermochromic ink, a configuration including a friction body that rubs handwriting and generates frictional heat as an erasing member is known (for example, Patent Documents 1 and 2).

  The thermochromic writing instrument described in Patent Document 1 has a clip-shaped friction body, and the friction body is attached to the writing instrument body by fitting the inner surface of the mounting hole provided in the friction body to the rear outer surface of the writing instrument body. On the other hand, it is removable.

  The thermochromic writing instrument described in Patent Document 2 has a friction body provided separately at the tip of the clip, and the clip itself is detachable from the writing instrument body.

JP 2011-230448 A JP 2012-096388 A

  Since the friction body of the thermochromic writing instrument described in Patent Documents 1 and 2 is positioned on the side surface of the writing instrument main body when attached to the writing instrument main body, the length of the writing instrument main body itself is affected when it is scratched. May interfere. That is, there is a possibility that the friction body cannot be placed at a position desired by the user at the time of rubbing.

  In addition, the clip-shaped friction body described in Patent Document 1 or the friction body provided on the clip described in Patent Document 2 can be easily attached to and detached from the writing instrument body. May be lost. As a result, not only the handwriting cannot be erased but also the function of the clip cannot be performed, so that the writing instrument cannot be held in a pocket or a notebook, and the convenience may be significantly reduced.

  Accordingly, an object of the present invention is to provide a writing instrument including an erasing member that can prevent the erasing member from being lost and can easily adjust the position of the erasing member during an erasing operation.

According to the first aspect of the present invention, the writing instrument body, the writing refill containing the thermochromic ink and contained in the writing instrument body, and the first erasing member disposed at the rear end of the writing instrument body A crown portion disposed at a rear end of the writing instrument body, the crown portion covers the first erasing member, and a through hole is formed in the crown portion. A pay-out writing instrument is provided.

According to a second aspect of the present invention, there is provided the writing instrument according to the first aspect of the present invention, wherein a space is formed between the crown portion and the first erasing member. The

According to a third aspect of the present invention, in the first or second aspect of the present invention, the clip is rotatable on an axis perpendicular to the central axis of the writing instrument body, and provided on the outer surface of the clip. A second erasing member, wherein the second erasing member is detachable from the clip, and the second erasing member is provided on a distal end side for gripping an article of the clip, A writing instrument is provided in which the rotation axis of the clip is arranged on the rear end side.

That is, in the invention described in claim 3, the loss of the erasing member is prevented and the position of the erasing member during the erasing operation can be easily adjusted. Further, when the erasing member is worn by use, it can be replaced with a new one. Further, when the clip is rotated, the erasing member is positioned at the position farthest from the gripping portion of the writing instrument, so that the user's handle and the erasing member can be comfortably written without touching and When erasing, it can be easily erased while holding the clip.

According to the invention described in claim 4, in the invention described in any one of claims 1 to 3, the first erasing member or the second erasing member is caused by the frictional heat generated when rubbing. There is provided a writing instrument made of a rubber elastic material capable of thermally changing the handwriting of thermochromic ink.

  According to the invention described in each claim, there is a common effect that the erasing member is prevented from being lost and the position of the erasing member during the erasing operation can be easily adjusted.

It is a front view of the writing instrument provided with the erasing member by 1st Embodiment of this invention. It is sectional drawing in line AA of FIG. (A) is a rear view of a clip base, (b) is sectional drawing of the clip base in line BB of (a). (A) is a front view of a clip fixing body, (b) is sectional drawing of the clip fixing body in line CC of (a). (A) is a front view of a leaf | plate spring, (b) is sectional drawing of the leaf | plate spring in line DD of (a). It is a figure which shows the state which rotated the clip of the writing instrument shown by FIG. 1 90 degree | times. It is a figure which shows the state which rotated the clip of the writing instrument shown by FIG. 1 180 degree | times. It is a front view of the writing instrument provided with the erasing member by 2nd Embodiment of this invention. It is sectional drawing in line EE of FIG. FIG. 9 is a perspective view of the erasing member shown in FIG. 8. It is a front view of the writing instrument provided with the erasing member by 3rd Embodiment of this invention. It is sectional drawing in line FF of FIG. FIG. 12 is a perspective view of the erasing member shown in FIG. 11. It is a front view of the writing instrument provided with the erasing member by 4th Embodiment of this invention. It is sectional drawing in line GG of FIG. (A) is a perspective view of the erasing member shown in FIG. 11, and (b) is a bottom view of the erasing member shown in FIG. It is a front view of the clip main body of the writing instrument shown in FIG.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. Corresponding components are denoted by common reference symbols throughout the drawings.

  FIG. 1 is a front view of a writing instrument 1 including an erasing member 50 according to the first embodiment of the present invention, and FIG. 2 is a cross-sectional view taken along line AA in FIG.

  The writing instrument 1 includes a clip 10, a clip fixing body 20, a leaf spring 30, and a writing instrument body 40. The writing instrument main body 40 includes a front end 41, a front shaft 42 having the front end 41 at the tip, a rear shaft 43, and a crown 44 that fits to the rear end of the rear shaft 43. The writing instrument 1 has an opening provided at the tip of the tip 41, that is, a writing tip, in which a writing refill (not shown) accommodated in the writing tool main body 40 by rotating the front shaft 42 and the rear shaft 43 relatively. This is a rotary-drawing type writing instrument that is fed out from 41a.

  A plurality of writing refills can also be accommodated in the writing instrument body 40. Examples of the writing refill include a ballpoint pen containing a thermochromic ink, a mechanical pencil containing a thermochromic core, and a pencil holder. In the present specification, in the axial direction of the writing instrument 1, the writing tip portion 41a side is defined as the “front” side, and the opposite side of the writing tip portion is defined as the “rear” side.

  The clip 10 has a clip base 11 and a clip body 12. The clip base 11 and the clip main body 12 are pivotally connected by a pin 13, and a coil spring 14 is disposed between the clip base 11 and the clip main body 12 behind the connection portion by the pin 13. The coil spring 14 urges the clip body 12 in a direction away from the clip base 11. As a result, the clip body 12 pivots around the pin 13 and the front end of the clip body 12 is biased against the clip base 11. Accordingly, an article such as paper can be sandwiched between the clip base 11 and the clip main body 12.

  The clip 10 in this embodiment is composed of a plurality of members such as a clip base 11, a clip main body 12, and a coil spring 14, but is opened forward as a whole so as to sandwich an article using an elastic member. You may form as one component of substantially U shape.

  In this embodiment, the erasing member 50 is provided at the tip portion of the clip body 12 by two-color molding. The erasing member 50 may be integrally formed by adhesion or the like in addition to the two-color molding, and as long as the erasing member 50 is provided on the outer surface of the clip body 12, not only the tip but also half or all of the clip body 12 is formed by the erasing member May be. Similarly, an erasing member 50 may be provided at the rear end portion of the clip body 12.

  The writing instrument 1 is configured such that the clip 10 is rotatable around a rotation axis R perpendicular to the center axis of the writing instrument body 40. This rotating mechanism will be described with reference to FIGS.

  3A is a rear view of the clip base 11, and FIG. 3B is a cross-sectional view of the clip base 11 taken along line BB in FIG. 3A. An insertion shaft 17 that protrudes perpendicularly to the back surface of the clip base 11 is formed on the back surface of the clip base 11, that is, behind the surface facing the writing instrument main body 40. A flange portion 16 is formed at the distal end portion of the insertion shaft 17. The diameter of the flange portion 16 is formed larger than the diameter of the insertion shaft 17. Further, on the back surface of the clip base portion 11, which is the root of the insertion shaft 17, a plurality of convex portions 18 extending in the radial direction are formed so as to fit into the concave portions 23 provided in the clip fixing body 20 described later. The convex portions 18 are uniformly formed in the circumferential direction at intervals of 90 degrees.

  4A is a front view of the clip fixing body 20, and FIG. 4B is a cross-sectional view of the clip fixing body 20 taken along line CC in FIG. 4A. The clip fixing body 20 is a ring-shaped member that is attached to the rear shaft 43 by setting the outer diameter of the rear shaft 43 to the inner diameter. The clip base 11 is rotatably connected to the clip fixing body 20, whereby the clip 10 is rotatably connected to the writing instrument body 40.

  A clip support box 21 is formed on one side surface of the clip fixing body 20. A leaf spring receiving space 21 a is formed in the clip support box 21, and an insertion hole 22, a recess 23, and a stopper portion 24 are formed on the outer surface of the clip support box 21. As will be described later, the leaf spring 30 is inserted into the leaf spring receiving space 21 a, and the insertion shaft 17 and the flange portion 16 of the clip base 11 are inserted into the insertion hole 22.

  More specifically, a plurality of recesses 23 extending in the radial direction are provided around the insertion hole 22, and the recesses 23 are uniformly formed in the circumferential direction at intervals of 45 degrees. The adjacent concave portions 23 are convex, and when the clip 10 rotates, the convex portions 18 provided on the clip main body 12 depart from the concave portions 23 to be fitted and ride on the adjacent convex portions. At this time, the movement of the clip body 12 in the front-rear direction is restricted by the stopper portion 24 provided in the front-rear direction of the recess 23. In addition, this stopper part 24 may be either one of front and back.

  A rear bearing insertion space 21b is formed inside the clip fixing body 20, and a fitting portion 25 with the rear shaft 43 is formed in this space. The clip fixing body 20 is fixed to the rear shaft 43 by fitting the fitting portion 25 with the rear portion of the rear shaft 43.

  In addition to the erasing member 50 provided on the clip 10, a further erasing member 60 may be disposed in the storage portion 26 behind the clip fixing body 20.

  5A is a front view of the leaf spring 30, and FIG. 5B is a cross-sectional view of the leaf spring 30 taken along line DD in FIG. The leaf spring 30 made of an elastic member is formed with a leaf spring slit 31 having an open portion 35 having one end opened at the center thereof. A concave surface 34 and a convex surface 33 are formed along the direction of the leaf spring slit 31. The concave surface 34 is formed on both sides of the convex surface 33. Further, a retaining portion 32 is formed at a position opposite to the opening portion 35. By bringing the rear end surface of the retaining portion 32 into contact with another member, the leaf spring 30 can be prevented from coming off. In the present embodiment, the leaf spring 30 is prevented from coming off by being brought into contact with the rear shaft 43 as shown in FIG.

  Next, a method for assembling the writing instrument 1 will be described. First, the flange portion 16 and the insertion shaft 17 provided on the back surface of the clip base portion 11 of the clip 10 are inserted into the insertion hole 22 of the clip fixing body 20. Next, the leaf spring 30 is inserted between the flange portion 16 and the clip fixing body 20, that is, into the leaf spring receiving space 21a, with the convex surface 33 side of the leaf spring 30 facing the flange portion 16 side. At this time, the insertion shaft 17 is passed through the leaf spring slit 31 from the open portion 35 side of the leaf spring slit 31 of the leaf spring 30. In this state, the retaining portion 32 of the leaf spring 30 and the rear shaft 43 come into contact with each other, so that the leaf spring 30 is prevented from coming off.

  Furthermore, since the leaf spring 30 has a convex surface 33 and a concave surface 34, it generates an urging force that resists the force in the direction in which the clip 10 comes out of the clip fixing body 20. That is, when a force in the direction of pulling out from the clip fixing body 20 acts on the clip 10, the convex surface 33 and the concave surface 34 of the leaf spring 30 are deformed so that there are no irregularities, but a resilience force to return it is generated. To do. This elastic force acts on the flange portion 16 that penetrates the leaf spring 30 through the leaf spring slit 31, and as a result, an urging force that resists the force in the direction in which the clip 10 comes out of the clip fixing body 20 is generated.

  The writing instrument 1 assembled as described above can rotate the clip 10 with respect to the writing instrument body 40. The clip 10 is rotated around the axis of the insertion shaft 17 of the clip base 11, that is, around the rotation axis R perpendicular to the center axis of the writing instrument body 40. When the clip 10 is rotated, the projection 18 formed on the back surface of the clip base 11 and the recess 23 formed on the clip fixing body 20 are disengaged against the urging force of the leaf spring 30 as described above. , You will be able to rotate freely. When the clip 10 rotates by a predetermined angle, the convex portion 18 of the clip base portion 11 is fitted into a different concave portion 23 by the urging force of the leaf spring 30, and the rotation of the clip is stopped.

  6 is a diagram showing a state in which the clip of the writing instrument 1 shown in FIG. 1 is rotated by 90 degrees, and FIG. 7 is a diagram in which the clip of the writing instrument 1 shown in FIG. 1 is rotated by 180 degrees. FIG. As a matter of course, the circumferential arrangement intervals of the plurality of convex portions 18 of the clip base 11 and the plurality of concave portions 23 of the clip support box 21 may be different from the above-described embodiment.

  The writing refill of the writing instrument 1 in this embodiment contains thermochromic ink. A thermochromic ink maintains a predetermined color (first color) at room temperature (for example, 25 ° C.) and changes to another color (second color) when the temperature is raised to a predetermined temperature (for example, 60 ° C.). After that, when the ink is cooled to a predetermined temperature (for example, −5 ° C.), the ink has a property of returning to the original color (first color) again. In the writing instrument 1 using the thermochromic ink, the second color is made colorless and the stroke drawn with the first color (for example, red) is heated to make it colorless, which is herein referred to as “erasing”. . Accordingly, in the embodiment, frictional heat is generated by rubbing against the paper surface or the like on which the drawn line is written by the erasing member 50 as a friction body, thereby changing the drawn line to colorless, that is, erasing. Of course, the second color may be a color other than colorless.

  As a material for forming the erasing member 50 as a friction body, rubber materials such as silicone rubber, nitrile rubber, ethylene propylene rubber, ethylene propylene diene rubber, and thermoplastic elastomers such as styrene elastomer, olefin elastomer, and polyester elastomer are used. Examples thereof include elastic materials, mixtures of two or more rubber elastic materials, mixtures of rubber elastic materials and synthetic resins, commercially available erasers, and the like.

  Examples of the material forming the clip base 11, the clip body 12, and the clip fixing body 20 include synthetic resins such as polycarbonate and acrylonitrile / butadiene / styrene.

  Note that “erasing” in the present invention means that the drawn strokes, characters, etc. are adsorbed or scraped off by an erasing member 50 such as an eraser, in addition to the case where the thermochromic ink is used. Therefore, the above-described embodiment and the following embodiments of the present invention are also applicable to any writing instrument that erases a drawn stroke using the erasing member 50.

  According to the writing instrument 1 of the present embodiment, the clip main body 12 and the erasing member 50 are integrated, and the clip main body 12 is connected to the clip base 11 by the pin 13, so that the erasing member 50 is lost. There is an advantage that is prevented. Further, since the clip 10 is rotatable with respect to the writing instrument body 40, there is an advantage that the position of the erasing member 50 during the erasing operation can be easily adjusted. Further, when the clip 10 is rotated, the erasing member 50 is positioned at the position farthest from the gripping portion of the writing instrument, so that the user's handle and the erasing member 50 can write comfortably without contact. And can be easily erased while holding the clip 10 during erasure.

  8 is a front view of the writing instrument 100 including the erasing member 150 according to the second embodiment of the present invention, FIG. 9 is a cross-sectional view taken along the line EE of FIG. 8, and FIG. FIG. 3 is a perspective view of the erasing member 150 shown. The writing instrument 100 includes a clip 110, a clip fixing body 20, a leaf spring 30, and a writing instrument body 40. The writing instrument 100 differs from the writing instrument 1 provided with the erasing member 50 according to the first embodiment only in the shape of the clip body and the shape of the erasing member, and the other points are the same.

  The clip 110 has a clip base 11 and a clip body 112. A through hole 112a is formed at the tip of the clip body 112, and an erasing member 150 is attached to the through hole 112a.

  The erasing member 150 includes an erasing portion 151, a locking flange portion 152, and a connecting shaft 153 that connects between the erasing portion 151 and the locking flange portion 152, and these are integrally formed. The erasing member 150 is attached to the clip body 112 by press-fitting a locking flange portion 152 into the through hole 112a from the outer surface side of the clip body 112. The axial length of the connecting shaft 153 is set to be equal to the thickness of the clip body 112, and thus the erasing member 150 is attached to the clip body 112 without loosening.

  The material of the erasing member 150 and the clip body 112 is the same as that of the erasing member 50 and the clip body 12 according to the first embodiment. The erasing part 151 of the erasing member 150 according to the present embodiment is hemispherical, but may have any other shape. Further, the erasing portion 151, the locking flange portion 152, and the connecting shaft 153 may be formed as separate members.

  According to the writing instrument 100 of this embodiment, in addition to the advantage obtained by the writing instrument 1 of the first embodiment described above, there is a further advantage that when the erasing member 150 is worn by use, it can be replaced with a new one. .

  FIG. 11 is a front view of a writing instrument 200 provided with an erasing member 250 according to the third embodiment of the present invention, FIG. 12 is a cross-sectional view taken along line FF in FIG. 11, and FIG. FIG. 6 is a perspective view of the erasing member 250 shown. The writing instrument 200 includes a clip 210, a clip fixing body 20, a leaf spring 30, and a writing instrument body 40. The writing instrument 200 differs from the writing instrument 1 including the erasing member 50 according to the first embodiment only in the shape of the clip body and the shape of the erasing member, and the other points are the same.

  The clip 210 has a clip base 11 and a clip body 212. A separate erasing member 250 is attached to the outer surface of the clip body 212 so as to cover the whole. The erasing member 250 is an elongated member having a first locking claw portion 250a and a second locking claw portion 250b at both ends. The erasing member 250 is attached to the clip main body 212 by engaging the first locking claw portion 250 a and the second locking claw portion 250 b with the front and rear ends of the clip main body 212.

  The materials of the erasing member 250 and the clip body 212 are the same as those of the erasing member 50 and the clip body 12 according to the first embodiment. Although the entire shape of the erasing member 250 according to the present embodiment is rectangular, it may be formed in other shapes such as a curved shape.

  According to the writing instrument 200 of the present embodiment, in addition to the advantages obtained by the writing instrument 1 of the first embodiment described above, there is a further advantage that when the erasing member 250 is worn by use, it can be replaced with a new one. .

  14 is a front view of a writing instrument 300 provided with an erasing member 350 according to a fourth embodiment of the present invention, FIG. 15 is a cross-sectional view taken along line GG in FIG. 14, and FIG. 11 is a perspective view of the erasing member 350 shown in FIG. 11, (b) is a bottom view of the erasing member 350 shown in FIG. 11, and FIG. 17 is a clip body of the writing instrument 300 shown in FIG. FIG.

  The writing instrument 300 includes a clip 310, a clip fixing body 20, a leaf spring 30, and a writing instrument body 40. The writing instrument 300 differs from the writing instrument 1 provided with the erasing member 50 according to the first embodiment only in the shape of the clip body and the shape of the erasing member, and the other points are the same.

  The clip 310 has a clip base 11 and a clip body 312. The clip body 312 is formed with a key-shaped through hole 312a, and an erasing member 350 is attached to the key-shaped through hole 312a. As will be described later, the key-shaped through-hole 312a has an axially asymmetric shape that allows the locking flange portion 352 and the connection shaft 353 to pass only when the erasing member 350 is attached in a predetermined posture.

  The erasing member 350 includes an erasing portion 351, a locking flange portion 352, and a connecting shaft 353 that connects between the erasing portion 351 and the locking flange portion 352, and these are integrally formed. The erasing unit 351 has two curved surface portions 351b that are convex side surfaces disposed opposite to the flat top portion 351a and a ridge line portion 351c that smoothly connects the curved surface portions 351b.

  The connecting shaft 353 has a circular cross-sectional shape, whereas the locking flange portion 352 has a substantially rectangular cross-sectional shape. The length of the long side of the locking flange portion 352 is formed larger than the diameter of the connection shaft 353. The shape and size of the locking flange portion 352 of the erasing member 350 and the connection shaft 353 projected in the axial direction of the connection shaft 353 are determined so as to be enclosed in the key-shaped through hole 312 a of the clip body 312. Further, the locking flange portion 352 is arranged so that its longitudinal direction is perpendicular to the longitudinal direction of the erasing member 350.

  The erasing member 350 inserts the locking flange portion 352 and the connecting shaft 353 into the key-shaped through hole 312a by pressing in a state where the longitudinal direction of the erasing portion 351 is perpendicular to the longitudinal direction of the clip body 312. Can be attached to the clip body 312. Next, attachment is completed by rotating the erasing member 350 by 90 degrees. The axial length of the connecting shaft 353 is set to be equal to the thickness of the clip body 312, and thus the erasing member 350 is attached to the clip body 312 without loosening. As a matter of course, the cross-sectional shapes of the locking flange portion 352 and the connecting shaft 353 facing the key-shaped through hole 312a may be different as long as the same purpose can be achieved.

  The materials of the erasing member 350 and the clip body 312 are the same as those of the erasing member 50 and the clip body 12 according to the first embodiment, respectively. The erasing part 351 of the erasing member 350 according to the present embodiment may have any other shape. Further, the erasing portion 351, the locking flange portion 352, and the connecting shaft 353 may be formed as separate members.

  According to the writing instrument 300 of the present embodiment, in addition to the advantages obtained by the writing instrument 1 of the first embodiment described above, there is a further advantage that when the erasing member 350 is worn by use, it can be replaced with a new one. . Further, since the clip body 312 has the key-like through hole 312a, there is an advantage that the erasing member 350 is not easily removed. Further, since the erasing member 350 includes the top portion 351a, the curved surface portion 351b, and the ridge line portion 351c, there is an advantage that the user can freely select a site to be scraped according to the area and shape to be erased. .

DESCRIPTION OF SYMBOLS 1 Writing instrument 10 Clip 20 Clip fixing body 30 Leaf spring 40 Writing instrument main body 50 Erase member R Rotation axis

Claims (4)

A writing instrument body, a writing refill containing thermochromic ink and housed in the writing instrument body, a first erasing member disposed at a rear end of the writing instrument body, and a rear end of the writing instrument body With a crown,
A feeding-type writing instrument , wherein the crown portion covers the first erasing member, and a through hole is formed in the crown portion . The writing instrument according to claim 1, wherein a space is formed between the crown portion and the first erasing member . A clip rotatable around an axis perpendicular to the central axis of the writing instrument body; and a second erasing member provided on an outer surface of the clip, wherein the second erasing member is attached to the clip. 3. The apparatus according to claim 1 , wherein the second erasing member is provided on a front end side that grips an article of the clip, and a rotation shaft of the clip is disposed on a rear end side thereof. Writing instrument as described. The said 1st erasure | elimination member or the said 2nd erasure | elimination member consists of a rubber elastic material which can thermally change the handwriting of the said thermochromic ink with the frictional heat which arises when rubbing. Writing instruments.