JP2016097667A - Writing instrument comprising erasing member - Google Patents

Abstract

PROBLEM TO BE SOLVED: To form a connection part between a top crown fitted to a knock side of a writing instrument comprising an erasing member and a knock bar, with an erasing member, and allow a user to quickly erase a handwriting after removing the top crown.SOLUTION: A knock type writing instrument 1 comprises an erasing member 7 for erasing a handwriting which is written on a paper surface, and a pen point of a refill 5 is projected from a tip end part of a barrel, by knocking a top crown 10. In the top crown 10, the erasing member 7 is stored. The erasing member 7 comprises a protrusion part 70 protruding from the top crown 10. A base end side of the protrusion part 70 comprises a projection 71, a knock bar 30 is formed into a cylindrical body for receiving the protrusion part 70, and an inner peripheral face of the cylindrical body comprises a projection 31 which is engaged with the projection 71, for engaging them. A rear end part of the knock bar 30 during removal of the top crown 10, is positioned on a tip end part side of the barrel, relative to an end face of the rear end side of the barrel. As the result, the protrusion part 70 does not become dirty, and the handwriting can be quickly erased using the protrusion part 70 on the top crown 10 which is removed from the writing instrument 1.SELECTED DRAWING: Figure 5

Description

  The present invention relates to a writing instrument with an erasing member including a protective member that protects an erasing member capable of erasing handwriting written on paper with a writing instrument.

  In recent years, writing tools such as ballpoint pens and color markers using thermochromic ink have become widespread. A friction body made of an elastic material is provided behind the shaft of the writing instrument using such a thermochromic ink (the pen tip side of the writing instrument is the front and the opposite side is the rear). The thermochromic ink is thermally discolored by frictional heat generated by rubbing the handwriting with a friction body to erase the handwriting. The handwriting here means both letters and pictures written on paper (see Daijirin third edition).

  In the writing instrument using such a thermochromic ink, since the friction body is provided in a state of being exposed behind the shaft tube, dust and dirt may adhere to the friction body when not in use. For this reason, when the handwriting is rubbed with a friction body to which dust or dirt adheres after writing, the dust or dirt may move to the paper and stain the paper.

  Therefore, Patent Document 1 discloses a thermochromic writing instrument in which a friction body is covered with a cover when not in use. In Patent Document 1, a male screw is formed around the rear end opening of the shaft cylinder of the writing instrument attached with the friction body exposed, and a female screw is formed on the inner peripheral surface of the opening of the cover that covers the friction body. Then, the cover is screwed into the rear end portion of the shaft cylinder to hide the friction body when not in use.

  And in patent document 1, in order that the cover screwed in the rear-end part of the shaft cylinder of a writing instrument may not remove from the rear-end part of a shaft cylinder, a cover is screwed in the rear-end part of a shaft cylinder. When the cover is placed on the friction body, the elastic force of the friction body acts on the screwed portion so that the bottom of the cover is pressed against the friction body. Further, in Patent Document 1, when a sponge is attached to the bottom of the cover or a brush is attached, and the cover is screwed into the shaft cylinder of the writing body, the elasticity of the sponge or brush is applied to the screwed portion. Also disclosed is a structure on which act.

  However, in the thermochromic writing instrument described in Patent Document 1, it is necessary to relatively rotate the cover and the rear end portion of the shaft cylinder many times before the cover is completely screwed to the rear end portion of the shaft cylinder. There is a problem that it takes time to attach the cover to the rear end of the shaft cylinder. In addition, since the relative rotational speed until the cover is completely attached to the rear end of the shaft cylinder is large, if the rotation is stopped halfway because it is considered that the installation has been completed, the cover and the rear end of the shaft cylinder There was also a problem that the screwing strength was small, and the cover was removed and the cover was lost.

  Therefore, Patent Document 2 discloses that the fitting between the cover and the rear end portion of the shaft tube is a press-fitting fitting or a concave-convex fitting other than the screw fitting. The cover is described as a protective member in Patent Document 2. In the press-fitting fitting, a friction body having an elastic force provided on the rear end portion of the shaft tube is compressed on the inner peripheral surface of the protection member to fit the protection member and the rear end portion of the shaft tube. In addition, in the concave / convex fitting, an annular protrusion is provided on the inner peripheral surface of the protective member, and an annular protrusion is provided on the lower end portion of the friction body, so that the protrusion inside the protective member gets over the protrusion on the friction body side. To be locked.

  Furthermore, in order to solve the problem that the cover removed from the friction body is easily lost when the friction body is used in Patent Document 1, the locking portion of the friction body to which the removed protective member is attached is disclosed in Patent Document 2. It is provided on the shaft tube and cap. In Patent Document 2, since the removed protective member is locked to the shaft cylinder or the cap, there is no possibility of losing the protective member.

JP 2014-124810 A JP 2014-141077 A

  However, in the structure in which the protection member removed when the friction member is used is attached to the locking portion as in Patent Document 2, the operation of attaching the removed protection member to the locking portion is necessary before the handwriting is erased by the friction member. Therefore, there is a problem that the erasing operation cannot be performed immediately, and it takes time until the erasing operation. In addition, since the friction member is provided on the shaft tube side in both the writing tool disclosed in Patent Document 1 and the writing tool disclosed in Patent Document 2, when the written handwriting is erased, the shaft tube is removed after removing the protective member. There is also a problem that it takes time from writing to erasing operation because the friction operation is performed by reversing.

  The present invention is capable of erasing the handwriting immediately after removing the crown, which is a protective member (cover) that protects the erasing member of the writing instrument with an erasing member during handwriting erasing, and attaching and detaching the crown to the barrel of the writing instrument. Another object of the present invention is to provide a writing instrument with an erasing member that is easy to use.

  According to one aspect of the present invention, the refill pen tip is provided from the tip of the shaft cylinder by knocking a crown attached to the rear end of the shaft cylinder, the erasing member being capable of erasing the handwriting written on the paper. In a knock-type writing instrument that causes the crown to appear and disappear, an erasing member is attached to the inside of the cylinder forming the crown, and the erasing member is provided with a protruding part that protrudes from the opening of the cylindrical body, There is provided a writing instrument with an erasing member that is detachably connected to the rear end side of the knock mechanism that is provided in the shaft cylinder of the writing instrument and causes the refill pen tip to move in and out by knocking the crown. .

  The erasing member can be connected to the knock bar located on the most rear end side of the knock mechanism by fitting. Moreover, the writing tool with an erasing member is provided in which the rear end portion of the knock bar is located closer to the front end portion side of the shaft tube than the end surface on the rear end side of the shaft tube. Furthermore, the refill contains thermochromic ink, and the handwriting written by the refill can be thermally discolored by frictional heat generated when it is rubbed by the erasing member.

  And the following aspect can be considered as another aspect which attaches the erasing member provided in the crown to the edge part of a knock stick.

(A) A mode in which a protrusion is provided on the outer peripheral surface of the erasing member, a plurality of protrusions are provided on the inner peripheral surface of the knock bar, and the crown of the erasing member gets over the protrusion of the knock bar and the crown is attached to the knock bar.
(B) A mode in which a protrusion is provided on the outer peripheral surface of the erasing member, a protrusion is also provided on the inner peripheral surface of the knock bar, and the crown of the erasing member gets over the protrusion of the knock bar and the crown is attached to the knock bar. .
(C) A mode in which protrusions are provided on the outer peripheral surface of the erasing member, an annular groove is provided on the inner peripheral surface of the knock bar, and the crown of the erasing member enters the groove of the knock bar so that the crown is attached to the knock bar.
(D) A mode in which a plurality of protrusions are provided on the outer peripheral surface of the erasing member, a protrusion is provided on the inner peripheral surface of the knock bar, and the crown of the erasing member gets over the protrusion of the knock bar so that the crown is attached to the knock bar.
(E) A mode in which a plurality of protrusions are provided on the outer peripheral surface of the erasing member, an annular groove is provided on the inner peripheral surface of the knock bar, the protrusion of the erasing member enters the groove of the knock bar, and the crown is attached to the knock bar.
(F) A mode in which an annular groove is provided on the outer peripheral surface of the erasing member, a plurality of protrusions are provided on the inner peripheral surface of the knock bar, and the protrusion of the knock bar enters the groove of the erasing member so that the crown is attached to the knock bar.
(G) A mode in which an annular groove is provided on the outer peripheral surface of the erasing member, a ridge is provided on the inner peripheral surface of the knock bar, and a ridge of the knock bar is inserted in the groove of the erasing member so that the crown is attached to the knock bar.

  According to the writing instrument with an erasing member of the present invention, the erasing member is provided at the coupling portion of the crown, which is attached to the rear end portion of the writing instrument and protecting the erasing member, with the knock rod of the writing instrument. When the crown is removed from the handwriting, the handwriting can be immediately erased without inverting the writing instrument. Further, since the handwriting is erased while holding the crown, there is no possibility of losing the crown when erasing the handwriting.

(A) is a front view of the writing instrument with an erasing member of the present invention in a non-writing state, (b) is a longitudinal sectional view of the writing instrument with an erasing member shown in (a), and (c) is an erasing shown in (b). It is the partial expanded sectional view which expanded the back side of the writing instrument with a member partially. (A) is a front view showing a state in which the crown with erasing member is removed from the writing instrument with erasing member shown in FIG. 1 (a), and (b) is erasing from the writing instrument with erasing member shown in FIG. 1 (b). The longitudinal cross-sectional view which shows the state from which the crown with a member was removed, (c) is a partial expanded sectional view which shows the state from which the crown with an erasing member was removed from the state shown in FIG.1 (c). BRIEF DESCRIPTION OF THE DRAWINGS The structure of the crown with erasure member of 1st Example used for the writing instrument with erasure member of this invention is shown, (a) is the perspective view which looked at the crown with erasure member from the knock stick insertion side, (b) ) Is a perspective view of the crown with an erasing member as viewed from the rear side, (c) is a front view of the crown with an erasing member, (d) is a left side view of the crown with an erasing member, and (e) is with an erasing member. It is a right view of a crown. BRIEF DESCRIPTION OF THE DRAWINGS The structure of the knock stick of 1st Example used for the writing instrument with an erasing member of this invention is shown, (a) is the perspective view which looked at the knock stick from the front end side of the writing instrument, (b) is the knock stick back. (C) is a front view of the knock bar, (d) is a left side view of the knock bar, (e) is a right side view of the knock bar, and (f) is a cross section in the axial direction of the knock bar. FIG. (A) is a perspective view showing an operation of attaching the crown with an erasing member shown in FIG. 3 to the knock bar from the rear end side of the writing instrument including the knock bar shown in FIG. 4, and (b) is shown in (a). It is a perspective view which shows the state in which the crown with an erasing member was attached to the knock stick from the state where it had come. The combination which can use the rear end part of the knock stick of the 1st-3rd Example used for the writing instrument with an erasing member of this invention, and the crown with an erasing member of the 1st-3rd Example attached to this is used. It is explanatory drawing shown. The structure of the crown with erasure member of the fourth embodiment used in the writing instrument with erasure member of the present invention is shown, (a) is a writing instrument with an erasure member showing a state in which the crown with erasure member is attached to a knock. (B) is a front view of the crown with an erasing member of the fourth embodiment, (c) is a perspective view of the crown with an erasing member as viewed from the front end side of the writing instrument, and (d). FIG. 3 is a perspective view of a crown with an erasing member as viewed from the rear side. The structure of the crown with erasure member of 5th Example and 6th Example used for the writing instrument with erasure member of this invention is shown, (a) is a front view of the crown with erasure member of 5th Example. (C) is a front view of the crown with an erasing member of the sixth embodiment. It shows the structure of the crown with erasure member of the seventh embodiment used in the writing instrument with erasure member of the present invention, (a) is a front view of the crown with erasure member of the seventh embodiment, (b) is It is a longitudinal cross-sectional view of the crown with an erasing member of 7th Example. It shows the structure of the crown with erasure member of the eighth embodiment used for the writing instrument with erasure member of the present invention, (a) is a front view of the crown with erasure member of the eighth embodiment, (b) is It is a longitudinal cross-sectional view of the crown with an erasing member of 8th Example. It shows the structure of the crown with erasure member of the ninth embodiment used for the writing instrument with erasure member of the present invention, (a) is a front view of the crown with erasure member of the ninth embodiment, (b) is It is a longitudinal cross-sectional view of the crown with an erasing member of the ninth embodiment. It shows the structure of the crown with erasure member of the tenth embodiment used for the writing instrument with erasure member of the present invention, (a) is a front view of the crown with erasure member of the tenth embodiment, (b) is It is a longitudinal cross-sectional view of the crown with an erasing member of 10th Example. The structure of the crown with an erasure member of 11th Example used for the writing instrument with an erasure member of this invention is shown, (a) is a front view of the crown with an erasure member of 11th Example, (b) is It is a longitudinal cross-sectional view of the crown with an erasing member of 11th Example. It shows the structure of the crown with erasure member of the twelfth embodiment used for the writing instrument with erasure member of the present invention, (a) is a front view of the crown with erasure member of the twelfth embodiment, and (b) is a front view. It is a longitudinal cross-sectional view of the crown with an erasing member of 12th Example.

  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 (a) is a front view of a non-writing state of the writing instrument 1 with an erasing member provided with the crown 10 with an erasing member of the first embodiment of the present invention and the knock bar 30 of the first embodiment. FIG.1 (b) has shown the longitudinal cross-section of the writing instrument 1 with an erasing member shown to Fig.1 (a). Moreover, FIG.1 (c) has expanded and shown the coupling | bond part of the crown 10 with an erasing member of FIG. In the following description of the embodiments, the crown with an erasing member is simply referred to as a crown.

  The erasing member-equipped writing instrument 1 is a knock-type writing instrument, in which a clip 9 is provided on the main body, and a knocking crown 10 is provided on the opposite side of the writing side. The crown 10 can be removed from the writing instrument 1 with an erasing member. In the following description, the writing side is referred to as the front side or the front side, and the opposite side of the writing side is referred to as the back side or the rear side. Further, the erasing member-equipped writing instrument 1 is hereinafter also referred to as a knock-type writing instrument 1. The knock type writing instrument 1 includes an inner cylinder 8 having a shaft cylinder including a front shaft 2, a rear shaft 3, and a clip 9. The rear side of the front shaft 2 is inserted into the front end portion of the rear shaft 3 and is screwed by male and female screw grooves. The inner cylinder 8 may be formed integrally with the rear shaft 3, and the front shaft 2 and the rear shaft 3 may also be formed integrally.

  Moreover, as shown in FIG.1 (b), inside the front axis | shaft 2, the rear axis | shaft 3, and the inner cylinder 8 of the knock type writing instrument 1, the refill 5 which is a writing body provided with the writing part 5a at one end, and the refill There are a spring 6 for urging the rear 5 and a knock mechanism 50 disposed at the rear end (rear end) of the rear shaft 3. The knock mechanism 50 includes a knock bar 30 connected to the crown 10 and a rotor 60 provided between the knock bar 30 and the refill 5. It is assumed that the refill 5 contains, for example, thermochromic ink that changes color and becomes transparent when rubbed with an erasing member, which will be described later, or ink that is peeled off from the paper surface by an erasing member, which will be described later.

  The front side of the front shaft 2 is formed in a tapered shape, and a through hole 2a for projecting the writing portion 5a of the refill 5 is formed at the front end portion (front end portion). When a knocking operation for pressing the crown 10 is performed, the writing state in which the writing portion 5a of the refill 5 protrudes from the through hole 2a and the writing portion 5a are accommodated inside the through hole 2a by the knock rod 30 and the rotor 60. Become non-written. Since the switching between the writing state and the non-writing state of the knock type writing instrument 1 by the knock mechanism 50 when the crown 10 is pressed is not directly related to the present invention, further explanation is omitted.

  FIG. 2A shows a state in which the crown 10 is removed from the knocking writing instrument 1 shown in FIG. 1A, and FIG. 1B shows the knocking writing instrument shown in FIG. 1A. 1 shows a longitudinal section. 2C shows a state in which the crown 10 is removed from the rear end portion of the knock bar 30 from the state shown in FIG.

  As can be seen from FIGS. 1C and 2C, in the present invention, the erasing member 7 is attached to the inner peripheral surface 11 of the crown 10. The erasing member 7 used for erasing the handwriting has a projecting portion 70 projecting from the crown 10, and this projecting portion 70 is coupled to the knock bar 30. The protrusion 70 and the knock bar 30 are coupled to each other by a protrusion 71 provided on the protrusion 70 and a protrusion 31 provided on the knock bar 30. Further, when erasing the handwriting drawn on the paper surface using the knock-type writing instrument 1, the crown 10 is removed by gripping the outer peripheral surface 12, and the protruding portion 70 of the erasing member 7 protruding from the crown 10 is removed. use. Here, the structure of the crown 10 of the first embodiment and the structure of the knock bar 30 of the first embodiment will be described with reference to FIGS.

  3A is a view of the crown 10 viewed from the insertion side (front) with the knock bar 30, and FIG. 3B is a view of the crown 10 shown in FIG. 3A viewed from the opposite side. Is. 3C is a view of the crown 10 shown in FIG. 3A viewed from the front, and FIG. 3D is the left side of the crown 10 shown in FIG. FIG. 3E is a right side view of the crown 10. Since the cross section of the crown 10 in the axial direction is shown in FIG. 2C, the illustration is omitted here.

  As shown in FIG. 2C, the erasing member 7 is attached to the inner peripheral surface 11 of the crown 10 without a gap. The erasing member 7 includes a protruding portion 70 that protrudes in a cylindrical shape from the opening 16 of the crown 10, and a protrusion 71 is formed on the base side of the protruding portion 70. The height from the outer peripheral surface of the protrusion part 70 of the protrusion 71 is very small so that FIG.3 (d) may show. Further, the outer shape of the cross section of the protrusion 71 is an arc shape or a part of an ellipse. When the canopy 10 is made of metal or hard plastic, the erasing member 7 can be attached to the inner peripheral surface of the canopy 10 by fitting, press-fitting, or bonding with an adhesive. It is also possible to form the crown 10 and the erasing member 7 by two-color molding or the like.

  4 (a) to 4 (f) show the structure of the knock bar 30 of the first embodiment taken out from the knock mechanism 50 of the knock type writing instrument 1 shown in FIGS. 1 (b) and 2 (b). Is. 4 (a) shows the knock bar 30 as viewed from the front, and FIG. 4 (b) shows the knock bar 30 as shown in FIG. 4 (a) as viewed from the opposite side. Fig. 4 is a front view of the knock bar 30 shown in Fig. 4 (a). FIG. 4D shows the knock bar 30 shown in FIG. 4C viewed from the left side, and FIG. 4E viewed from the right side. Furthermore, FIG.4 (f) has shown the cross section of the axial direction of the knock stick 30 shown in FIG.4 (c).

  The knock bar 30 is a cylindrical member, and a cam is formed on the end surface of the knock mechanism connected to the rotor, and a plurality of protrusions are provided on the outer peripheral surface. Moreover, the end surface of the knock rod 30 on the side connected to the crown is flat. On the other hand, the inner diameter of the inner peripheral surface 34 of the knock bar 30 is slightly larger than the outer shape of the protruding portion of the erasing member protruding from the crown, and a projection 31 is formed on the side of the inner peripheral surface 34 that is connected to the crown. Yes.

  The height of the protrusion 31 from the inner peripheral surface 34 is very small as shown in FIGS. Moreover, although the end surface of the protrusion 31 is a flat surface in the first embodiment, the protrusion 31 may be raised from the inner peripheral surface 34 into a dome shape. In the first embodiment, a plurality of protrusions 31 are arranged at equal intervals in the circumferential direction of the inner peripheral surface 34. For this reason, when the crown 10 is attached to the knock bar 30, the protrusion 71 on the protrusion 70 of the erasing member 7 gets over the protrusion 31 provided on the inner peripheral surface 34 of the knock bar 30, and FIG. ), The protrusion 11 is locked by the protrusion 32.

  And the knock type writing instrument 1 to which the knock bar 30 is attached has an opening in which the rear end portion of the knock bar 30 is located at the rear end portion of the inner cylinder 8 as shown in FIG. It is inside the inner cylinder 8 than 8a. For this reason, when the knocking writing instrument 1 is in the non-writing state and the crown 10 is removed, it is difficult to push the end of the knocking rod 30 from the outside to bring the knocking writing instrument 1 into the writing state. Thus, when the knocking writing instrument 1 is in the non-writing state and the crown 10 is removed, the length of the knocking bar 30 is determined so that the knocking writing instrument 1 is not in the writing state. For this reason, when the knock-type writing instrument 1 is in a non-writing state and the crown 10 is removed, the end of the knock bar 30 does not protrude from the opening 8a of the inner cylinder 8 and is positioned lower than the opening 8a. .

  FIG. 5 (a) shows an operation of attaching the crown 10 shown in FIG. 3 to the knock bar 30 from the rear end side of the knock type writing instrument 1 including the knock bar 30 shown in FIG. The end of the knock bar 30 is attached to the knock type writing instrument 1 in a state of being located behind the opening 8 a at the rear end of the inner cylinder 8 of the knock type writing instrument 1. When attaching the crown 10 to the end side of the knock bar 30, the protrusion 70 of the erasing member 7 protruding from the crown 10 is moved from the opening 8 a to the inner cylinder 8 while holding the outer peripheral surface 12 of the crown 10. Insert and insert into knock bar 30. Then, the protrusion 71 provided on the outer peripheral surface of the protrusion 70 gets over the protrusion 31 provided on the inner peripheral surface of the knock bar 30, and the protrusion 70 is inserted into the knock bar 30.

  FIG. 5 (b) shows a state in which the crown 10 is inserted into the inner cylinder 8 of the knock type writing instrument 1 and attached to the knock bar 30 from the state shown in FIG. 5 (a). In this state, as shown in FIG. 1C, the protrusion 71 provided on the projecting portion 70 is engaged with the protrusion 31, and the end surface 15 of the crown 10 is the end surface 35 of the knock bar 30. Abut. As a result, the crown 10 attached to the knock bar 30 from the rear end portion of the knock type writing instrument 1 is difficult to come off.

  The crown 10 of the first embodiment is provided with a protrusion 71 on the outer peripheral surface of the protrusion 70 of the erasing member, and the knock bar 30 of the first embodiment is provided with a protrusion 31 on the inner peripheral surface. Met. The crown 10 of the first embodiment is shown in the uppermost right view of FIG. 6, and the knock bar 30 of the first embodiment is shown in cross section in the uppermost left view of FIG.

  On the other hand, for the crown, the crown 10A of the second embodiment shown in the right diagram in the center of FIG. 6 and the crown 10B of the third embodiment shown in the bottom right diagram of FIG. 6 are possible. The crown 10A of the second embodiment is one in which a protrusion 72 is provided on the outer peripheral surface of the protrusion 70. The crown 10 </ b> B of the third embodiment includes an annular groove 73 on the outer peripheral surface of the projecting portion 70. The position of the annular groove 73 is closer to the top crown 10A side than the position of the protrusion 71 in the top crown 10 of the first embodiment, and is a position for receiving the projection 31 when coupled with the knock bar 30 of the first embodiment.

  As for the knock bar, the knock bar 30A of the second embodiment shown in cross section in the left diagram in the center of FIG. 6 and the knock bar 30B of third embodiment shown in cross section in the bottom right diagram of FIG. Is possible. In the knock bar 30A of the second embodiment, a protrusion 32 is provided on the inner peripheral surface 34 instead of the protrusion. The knock bar 30B of the third embodiment has an annular groove 33 on the inner peripheral surface. The position of the annular groove 33 is farther than the position from the end face 35 of the protrusion 31 in the crown 10 of the first embodiment, and is a position for receiving the protrusion 71 when coupled to the crown 10 of the first embodiment.

  6 shows the crown 10 of the first embodiment, the crown 10A of the second embodiment and the crown 10C of the third embodiment, the knock rod 30 of the first embodiment, and the knock rod 30A of the second embodiment. The possible combinations of the knock bars 30C of the third embodiment are indicated by arrows. The crown 10 of the first embodiment can be combined with all of the knock bars 30, 30A, 30B of the first to third embodiments. Further, the crown 10A of the second embodiment can be combined with the knock bars 30A, 30B of the second and third embodiments. Furthermore, the crown 10B of the third embodiment can be combined with the knock bars 30, 30A of the first and second embodiments.

  FIG. 7 (a) shows the structure of the knock type writing instrument 1 to which the crown 10C of the fourth embodiment of the present invention is attached. The crown 10C of the fourth embodiment can be used for the knock type writing instrument 1 having any of the knock bars 30, 30A, 30B of the first to third embodiments. FIG. 7A shows a knock type writing instrument 1 including the knock bar 30 of the first embodiment.

  As shown in FIGS. 7B to 7D, the crown 10C of the fourth embodiment is provided with a plurality of rib-like protrusions 14 on the outer peripheral surface 12 of the crown 10 of the first embodiment. Is. The protrusions 14 are provided on the outer peripheral surface 12 of the crown 10C so as to protrude radially from the axis of the crown 10C at equal intervals. The protrusions 14 are tapered at the rear end of the crown 10C. Thus, the height from the outer peripheral surface 12 of the crown 10C is formed so as to be gradually lowered. And the outer peripheral surface 12 of the crown 10C between the protrusion part 14 and the protrusion part 14 becomes the groove | channel 13 which connects the crown 10C to the front-back direction. The groove 13 becomes an airway when the crown 10C is accidentally swallowed.

  The shape of the erasing member 7 provided in the crown 10C and the protruding portion 70 protruding from the erasing member 7 includes the protrusion 71 provided on the outer peripheral surface of the protruding portion 70 in the crown 10 of the first embodiment. The structure of the erasing member 7 is the same. Therefore, the crown 10C of the fourth embodiment can be used for the knock type writing instrument 1 provided with any of the knock bars 30, 30A, 30B of the first to third embodiments.

  When a plurality of protrusions 14 and grooves 13 are provided on the outer peripheral surface 12 in the axial direction as in the crown 10C of the fourth embodiment, the crown 10C in which the protrusions 70 are inserted into the knock bar 30 is used. When removing from the knock bar 30, it is easy to grip the crown 10C. For this reason, it is easy to remove the crown 10C from the knock bar 30. The number of the protrusions 14 and the depth of the groove 13 are not particularly limited as long as the crown 10C inserted into the knock bar 30 can be easily gripped. For example, when the crown 10C is made of metal, the outer surface of the crown 10C may be knurled, satin-finished, or the like.

  Similarly, in the fifth embodiment shown in FIG. 8A, a plurality of rib-like protrusions 14 are provided on the outer peripheral surface 12 of the crown 10A of the second embodiment shown in the right diagram in the center of FIG. 8D shown in FIG. 8B, in which a plurality of rib-like protrusions 14 are provided on the outer peripheral surface of the crown 10D of the first crown and the crown 10B of the third embodiment shown in the lowermost right-hand drawing of FIG. The crown 10E of the embodiment is possible.

  Next, a seventh embodiment to a twelfth embodiment of the present invention showing a structure for attaching the erasing member to the crown can be described with reference to FIGS. In the embodiments described below, all the erasing members are provided with protrusions, but of course, embodiments in which protrusions are provided and embodiments in which annular grooves are provided are also possible. Further, in the seventh to twelfth embodiments described below, no protrusion is provided on the outer peripheral surface of the crown, as in the first to third embodiments, but as in the fourth to sixth embodiments. An embodiment in which a protrusion is provided on the outer peripheral surface of the crown is also possible.

  FIG. 9 shows the structure of the crown 10F of the seventh embodiment used in the writing instrument with an erasing member of the present invention. FIG. 9 (a) is a front view of the crown 10F of the seventh embodiment, and FIG. b) is a longitudinal sectional view of the crown 10F of the seventh embodiment. In the crown 10F of the seventh embodiment, the inside of the outer peripheral surface 12 is solid, there is no inner peripheral surface, and there is no opening. And in the crown 10F of 7th Example, the erasing member 7 provided with the protrusion 71 similar to the protrusion 71 demonstrated in the previous Example is protrudingly provided in the end surface 17 by the side of the knock stick of the crown 10F. Has been. The diameter of the erasing member 7 is the same as the protrusion 70 in the embodiments described so far. The erasing member 7 can be adhered to the end surface 17 or attached to the end surface 17 by two-color molding when the crown 10F is molded.

  FIG. 10 shows the structure of the crown 10G of the eighth embodiment used in the writing instrument with an erasing member of the present invention. FIG. 10 (a) is a front view of the crown 10G of the eighth embodiment, and FIG. b) is a longitudinal sectional view of the crown 10G of the eighth embodiment. The crown 10G of the eighth embodiment has a solid inside of the outer peripheral surface 12, no inner peripheral surface, and no opening. On the other hand, in the crown 10G of the eighth embodiment, the convex portion 18 is provided on the end surface 17 of the crown 10G. The cross-sectional shape of the convex portion 18 is not particularly limited, and may be a circle, a square, a triangle, or a polygon. And the erasing member 7 provided with the same external shape as the protrusion part 70 in the Example demonstrated until now is attached to the end surface 17 of the crown 10G. A protrusion 71 is provided on the outer peripheral portion of the erasing member 7, and a concave portion 78 into which the convex portion 18 is inserted is provided in the erasing member 7 on the end surface 17 side. The cross-sectional shape of the concave portion 78 is equal to the cross-sectional shape of the convex portion 18. The erasing member 7 can be attached to the end surface 17 by bonding the concave portion 78 to the convex portion 18 or by two-color molding when the crown 10G is molded.

  FIG. 11 shows the structure of the crown 10H of the ninth embodiment used in the writing instrument with an erasing member of the present invention. FIG. 11 (a) is a front view of the crown 10H of the ninth embodiment, and FIG. b) is a longitudinal sectional view of the crown 10H of the ninth embodiment. The crown 10H of the ninth embodiment has a solid inside of the outer peripheral surface 12, no inner peripheral surface, and no opening. On the other hand, in the crown 10H of the ninth embodiment, the end surface 17 of the crown 10H is provided with a convex portion 18 having a flange portion 19 at the tip. And the erasing member 7 provided with the same external shape as the protrusion part 70 in the Example demonstrated until now is attached to the crown 10H. A protrusion 71 is provided on the outer peripheral portion of the erasing member 7, and the erasing member 7 on the end surface 17 side is provided with concave portions 78 and 79 having the same cross-sectional shape as the convex portion 18 and the flange portion 19. Yes. The cross-sectional shape of the convex part 18 and the flange part 19 can be made into circular, for example. The erasing member 7 can be attached to the end surface 17 by deforming the concave portions 78 and 79 and fitting, press-fitting, or adhering to the convex portion 18, or by two-color molding when the crown 10H is molded.

  FIG. 12 shows the structure of the crown 10I of the tenth embodiment used in the writing instrument with an erasing member of the present invention. FIG. 12 (a) is a front view of the crown 10I of the tenth embodiment, and FIG. b) is a longitudinal sectional view of the crown 10I of the tenth embodiment. The crown 10I of the tenth embodiment has a solid inside of the outer peripheral surface 12, no inner peripheral surface, and no opening. On the other hand, in the crown 10I of the tenth embodiment, the columnar portion 20 is provided on the end surface 17 of the crown 10I. The diameter of the columnar portion 20 is the same as the diameter of the erasing member 7 described in the ninth embodiment. And the protrusion 21 is formed in the outer peripheral surface by the side of the front-end | tip part of the columnar part 20. As shown in FIG. The shape of the ridge 21 is, for example, the same shape as the ridge 71 formed on the erasing member 7 in the crown 10H of the ninth embodiment. The erasing member 7 can be adhered to the end surface of the columnar portion 20 or attached to the end surface 17 by two-color molding when the crown 10I is molded.

  FIG. 13 shows the structure of the crown 10J of the eleventh embodiment used in the writing instrument with an erasing member of the present invention. FIG. 13 (a) is a front view of the crown 10J of the eleventh embodiment, and FIG. b) is a longitudinal sectional view of the crown 10J of the eleventh embodiment. In the crown 10J of the eleventh embodiment, the columnar portion 20 is provided on the end surface 17 of the crown 10J. The diameter of the columnar portion 20 is the same as the diameter of the erasing member 7 described in the ninth embodiment. And the protrusion 21 is formed in the outer peripheral surface by the side of the front-end | tip part of the columnar part 20. As shown in FIG. The shape of the protrusion 21 is the same shape as the protrusion 71 formed in the protrusion part 70 in the crown 10H of 9th Example, for example. Furthermore, in the crown 10J of the eleventh embodiment, a mounting hole 22 for the erasing member 7 is provided along the axial direction of the crown 10J from the tip end side of the columnar portion 20. In the present embodiment, the mounting hole 22 extends through the columnar portion 20 to the free end side of the crown 10J, but the depth of the mounting hole 22 is not particularly limited. On the other hand, the erasing member 7 attached to the end face of the columnar portion 20 is provided with a mounting rod 74 that is inserted into the mounting hole 22 described above. In this embodiment, the length of the mounting rod 74 is equal to the depth of the mounting hole 22, but the length of the mounting rod 74 may be shorter than the depth of the mounting hole 22. When the mounting rod 74 is completely inserted into the mounting hole 22, the erasing member 7 comes into close contact with the end surface of the columnar portion 20. The erasing member 7 can be attached to the columnar portion 20 by fitting the attachment rod 74 into the attachment hole 22, press-fitting or adhering, or by two-color molding when molding the crown 10J.

  FIG. 14 shows the structure of a crown 10K of the twelfth embodiment used in the writing instrument with an erasing member of the present invention, (a) is a front view of the crown 10K of the twelfth embodiment, and (b) is a diagram of the crown. It is a longitudinal cross-sectional view of the crown 10K of 12 examples. The crown 10K of the twelfth embodiment has a solid inside of the outer peripheral surface 12, no inner peripheral surface, and no opening. On the other hand, in the crown 10K of the twelfth embodiment, the columnar portion 20 is provided on the end surface 17 of the crown 10K. The diameter of the columnar portion 20 is the same as the diameter of the erasing member 7 described in the ninth embodiment. And the protrusion 21 is formed in the outer peripheral surface by the side of the front-end | tip part of the columnar part 20. As shown in FIG. The shape of the ridge 21 is, for example, the same shape as the ridge 71 formed on the erasing member 7 in the crown 10H of the ninth embodiment. Further, a convex portion 18 is provided at the tip (end surface) of the columnar portion 20. The cross-sectional shape of the convex portion 18 is not particularly limited, and may be a circle, a square, a triangle, or a polygon. The erasing member 7 is attached to the end surface of the columnar portion 20. The erasing member 7 on the convex portion 18 side is provided with a concave portion 78 into which the convex portion 18 is inserted. The cross-sectional shape of the concave portion 78 is equal to the cross-sectional shape of the convex portion 18. The erasing member 7 can be attached to the end surface 17 by bonding the concave portion 78 to the convex portion 18 or by two-color molding when the crown 10K is molded.

  As described above, in the knock type writing instrument of the present invention, the erasing member 7 attached to the erasing member projection 70 or the end face of the crown can be used as the inner periphery of the knock bar 30, 30A, or 30B except when in use. Since it is housed inside the surface 34 and is not exposed to the outside, it is possible to prevent the erasing member 7 from being soiled. Further, the crowns 10, 10A to 10K in the embodiment described above can be easily attached to the knock bars 30, 30A, or 30B, and the crowns attached to the knock bars 30, 30A, or 30B. 10, 10A to 10K can be easily removed from the knock bars 30, 30A, or 30B.

  In the embodiment described above, thermochromic ink is accommodated in the refill which is a cursive. In this case, the knock-type writing instrument is a thermochromic writing instrument, and the erasing member is formed of a member that generates frictional heat with the paper surface when the paper surface is rubbed, and the handwriting of the knock-type writing tool is generated by the generated frictional heat. The heat can be discolored. As the writing body, a ballpoint pen containing a thermochromic ink, a mechanical pencil containing a thermochromic core, a pencil holder, or the like can be considered. In addition, a knocking writing instrument in which an eraser erasable ink that can be erased with an eraser is accommodated in the refill is possible. In this case, a member that is worn when the ink is peeled off from the paper surface is selected as the erasing member, similarly to the eraser.

  Here, the thermochromic ink means that a predetermined color (first color) is maintained at room temperature (for example, 25 ° C.), and when the temperature is raised to a predetermined temperature (for example, 65 ° C.), another color (second color) is obtained. The ink has a property of returning to the original color (first color) when cooled to a predetermined temperature (for example, −10 ° C.). In the writing instrument 1 using the thermochromic ink, making the second color colorless and raising the temperature of the stroke drawn with the first color (for example, red) to make it colorless is referred to as “erasing” here. Therefore, the friction surface as an erasing member rubs against the writing surface on which the drawn line is written to generate frictional heat, thereby changing the drawn line to colorless, that is, erasing. Of course, the second color may be a color other than colorless.

  Further, in a writing instrument that uses a refill containing an eraser erasable ink that can be erased with an eraser, the eraser erasable ink is composed of water and non-thermoplastic colored resin particles having an average particle diameter of 1.0 to 15 μm. On the other hand, it is necessary to contain at least 3 to 30% by weight and 0.1 to 15% by weight of non-colored particles.

  The colored resin particles used in the aqueous ink of the present invention are made of colored resin particles, are non-thermoplastic, and have an average particle diameter of 1.0 to 15 μm. For example, resin particles Colored resin particles in which a colorant made of pigment is dispersed, colored resin particles in which the surface of the resin particle is coated with a colorant made of pigment, colored resin particles in which a colorant made of dye is dyed on the resin particle, etc. Is mentioned.

  In this example, if the colored resin particles are non-thermoplastic and satisfy the above average particle diameter, the structure (with hollow structure, without hollow structure (solid)), shape (spherical, polygonal, flat) Is not particularly limited, but preferably has a glass transition point of 150 ° C. or higher and a thermal decomposition temperature from the viewpoint of exhibiting excellent eraser erasability, writing property, and stability over time as an ink. In addition, particles having an intramolecular cross-link having a melt flow index value of less than 0.1 are not sticky, and spherical colored resin fine particles having an average particle size of 1.0 to 15 μm Use is desirable.

  Rubber materials such as silicone rubber, nitrile rubber, ethylene propylene rubber, ethylene propylene diene rubber, and other rubber elastic materials such as thermoplastic elastomers such as styrene elastomer, olefin elastomer, and polyester elastomer Examples thereof include a mixture of the above rubber elastic materials, a mixture of a rubber elastic material and a synthetic resin, and a commercially available eraser.

  When the erasing member is a thermochromic writing instrument, it is formed from a mixture of a polypropylene resin and a styrene thermoplastic elastomer or a mixture of a polypropylene resin and a polypropylene thermoplastic elastomer, and the blending ratio thereof is 1: 1 by weight. ~ 1: 4, does not contain abrasives, plasticizers and fillers, is made of a material having a durometer hardness A specified in JIS K6251 of 70 ° to 100 °, and a pencil specified in JIS S 6050-2002 It is formed from a low-abrasion elastic material that does not contain a plasticizer that has a drawn line erasing ability (erasure rate) of 70% or less. As a result, the erasing member is effective because it is less likely to be erased when scraped and has excellent thermal discoloration.

  Note that “erasing” in the present invention means that the drawn strokes, characters, etc. are adsorbed or scraped off by an erasing portion such as an eraser, in addition to the case where the thermochromic ink is used. Furthermore, a configuration may be employed in which an erasing member and a crown are provided at the rear end portion of the capacitive touch pen by imparting electrical conductivity to the pressure-sensitive touch pen or the shaft tube. Therefore, this invention is applicable also to the arbitrary stationery provided with the erasing member which can erase the drawn line (handwriting) written by the writing implement.

1 Writing instrument with eraser (knock type writing instrument)
7 Erasing member 8 Inner tube 10, 10A to 10K, 20, 20A, 20B Caps 13, 33, 73 Groove 14, 70 Protruding part 20 Columnar part 30, 30A, 30B Knock bar 31, 72 Protruding 21, 32, 71 Protruding Article

Claims (4)

In a knock-type writing instrument comprising an erasing member capable of erasing handwriting written on a paper surface, and knocking a crown attached to the rear end of the shaft tube to make the refill pen tip appear and disappear from the tip of the shaft tube,
Attach the erasing member inside the cylinder forming the crown,
The erasing member is provided with a protruding portion that protrudes from the opening of the cylindrical body,
The projecting portion projecting from the crown is provided in the shaft cylinder of the writing instrument, and the end portion on the rear end side of the knock mechanism that causes the pen tip of the refill to move in and out by knocking the crown In addition, the writing instrument with an erasing member, which is detachably connected.   2. The writing instrument with an erasing member according to claim 1, wherein the erasing member is connected to a knock bar located closest to the rear end of the knock mechanism by fitting.   3. The writing instrument with an erasing member according to claim 2, wherein a rear end portion of the knock bar is positioned closer to a front end portion side of the shaft tube than an end surface on a rear end side of the shaft tube.   4. The thermochromic ink is accommodated in the refill, and a handwriting written by the refill can be thermochromic by frictional heat generated when it is rubbed by the erasing member. The writing instrument with an erasing member according to claim 1.

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