JP6545451B2 - Writing instrument with erasing member - Google Patents

Description

  The present invention relates to a writing instrument with an erasing member provided with a protecting member for protecting an erasing member capable of erasing a handwriting written on a sheet of paper with a writing instrument.

  In recent years, writing instruments such as ballpoint pens and color markers using thermochromic ink have become widespread. A friction body formed of an elastic material is provided on the back of the barrel of a writing instrument using such a thermochromic ink (the pen tip side of the writing instrument is on the front and the opposite side is on the back). The heat is used to cause the thermochromic ink to thermally discolor the heat-coloring ink by the heat generated by rubbing the hand-painted hand with the friction body to erase the hand-writing. In addition, a handwriting shall mean both the character and the picture currently written on the paper here (refer to Daishirin 3rd edition).

  In a writing instrument using such a thermochromic ink, the friction body is provided in a state of being exposed to the rear of the barrel, so that dust or hand dust may adhere to the friction body when not in use. For this reason, if the brush is rubbed with a friction body to which dust or hand marks have been attached after writing, dust or hand marks may move to the paper surface and stain the paper surface.

  Therefore, Patent Document 1 discloses a thermochromic writing instrument in which the friction body is covered with a cover when not in use. In Patent Document 1, an external thread is formed around the rear end opening of the barrel of the writing instrument attached with the friction body exposed, and an internal thread is formed on the inner circumferential surface of the opening of the cover over the friction body. The cover is screwed to the rear end of the barrel to hide the non-use friction body.

  Then, in Patent Document 1, the cover is screwed to the rear end of the barrel so that the cover screwed to the rear end of the barrel of the writing tool does not come off from the rear end of the barrel. When the friction body is covered, the bottom of the cover is pressure-bonded to the friction body so that the elastic force of the friction body acts on the screwing portion. In addition, according to Patent Document 1, when a sponge is attached to the bottom of the cover or a brush is attached and the cover is screwed to the shaft cylinder of the writing body, the elastic force by the sponge or the brush on the screwing portion Also disclosed are structures in which

  However, in the thermochromic writing instrument described in Patent Document 1, it is necessary to rotate the cover and the rear end of the barrel relative to each other until the cover is completely screwed to the rear end of the barrel. There is a problem that it takes time to mount the cover on the rear end of the barrel. In addition, since the relative rotation speed until the cover is completely attached to the rear end of the barrel is large, if it is considered that the installation is completed and rotation is stopped halfway, the cover and the rear end of the barrel and There is also a problem that the screwing strength of the case is small and the cover is removed and the cover is lost.

  Therefore, a protrusion is provided on the cover (hereinafter referred to as a crown) in the inner circumferential direction, and a protrusion is provided on the outer peripheral surface of the rear end of the shaft cylinder provided with the friction body to engage with the protrusion on the crown side. When attaching the crown to the barrel, the crown side protrusion is made to ride over the ridge provided on the outer peripheral surface of the rear end of the barrel and to be locked to the ridge, thereby Patent Document 2 discloses a structure for attaching to the rear end.

JP, 2014-124810, A JP, 2014-141077, A

  However, in the thermochromic writing instrument described in Patent Document 2, the protrusion provided on the inner peripheral surface on the crown side passes over the ridge on the rear end side of the barrel to make the crown the rear end of the barrel Although it is a structure attached to a part and there is no problem at the time of attachment of a crown, when removing a crown from a rear end of a barrel, there was a subject that a crown was difficult to remove from a rear end of a barrel. This is because when the crown is fitted to the rear end of the barrel, pushing is easy by pushing the end face of the rear end of the crown, but when the crown is removed from the rear end of the barrel, Because the side of the crown is held and removed, it is difficult to hold the crown.

  The present invention makes it possible to easily attach the crown, which is a protective member (cover) for protecting the erasing member of the writing instrument with the erasing member, to the rear end of the barrel of the writing instrument, and easily the rear end of the barrel of the writing instrument It is an object of the present invention to provide a writing instrument with an erasing member that can be removed from a part.

  According to one aspect of the present invention, the rear end portion of the barrel is provided with the erasing member capable of erasing the handwriting written on the paper surface, and the rear end portion of the barrel is attached with a crown that covers and protects the erasing member. In a writing instrument with an erasing member, a writing instrument with an erasing member is provided, which is provided with a protrusion for assisting gripping of the crown on the outer peripheral surface of the crown.

  The protrusion can be a rib-like protrusion formed in a plurality of strips in the axial direction of the outer peripheral surface. Moreover, a protrusion part can be made into the clip formed in the outer peripheral surface of the crown. Furthermore, there is a refill for writing in which a thermochromic ink is contained inside the barrel, and the handwriting written by the refill can be thermally discolored by the frictional heat generated when it is abraded by the erasing member.

And as a mechanism which attaches a crown to the rear end part of an axial cylinder, the following aspects can be considered.
(A) A first ridge is provided on the inner circumferential surface of the crown, a second ridge is provided on the outer circumferential surface of the rear end of the barrel, and the first ridge passes over the second ridge. A mode in which the crown is attached to the rear end of the barrel.
(B) A ridge is provided on the inner circumferential surface of the crown, and a plurality of projections are provided on the outer circumferential surface of the rear end of the barrel, and the ridge passes over the projection and the crown is attached to the rear end of the barrel Aspect.
(C) A plurality of projections are provided on the inner peripheral surface of the crown, a protrusion is provided on the outer peripheral surface of the rear end of the barrel, and the projection passes over the projection and the crown is attached to the rear end of the barrel Aspect.
(D) A ridge is provided on the inner circumferential surface of the crown, a circumferential groove is provided on the outer circumferential surface of the rear end of the barrel, the ridge is fitted in the circumferential groove, and the crown is the rear end of the barrel The aspect attached to a part.
(E) A circumferential groove is provided on the inner circumferential surface of the crown, a ridge is provided on the outer circumferential surface of the rear end of the barrel, and the ridge is fitted in the circumferential groove, and the crown is the rear end of the barrel The aspect attached to a part.

Furthermore, when the writing instrument with the erasing member is a knock-type writing instrument, the following mode is possible for the knock-type writing instrument.
(1) A knock type in which a writing state and a non-writing state can be switched by performing a knock operation including a shaft cylinder, a crown and a knock bar to which the crown is attached and pressing the crown forward. Aspect of writing instrument.
(2) A knock lock member disposed in front of the knock rod and capable of moving in the longitudinal direction in the shaft cylinder by gravity, and a locking portion provided on the inner surface of the shaft cylinder and capable of locking with the knock lock member The knock-type writing instrument according to claim 1, wherein the knock lock member moves rearward and locks with the locking portion when the front end of the barrel is directed upward, and the forward movement of the operation portion is blocked.

  According to the writing instrument with the erasing member of the present invention, the crown mounted on the rear end of the barrel of the writing instrument can be easily removed from the rear end of the barrel of the writing instrument while protecting the erasing member.

(A) is a front view in the non-writing state of the writing instrument with the erasing member of the first embodiment of the present invention, (b) is a longitudinal sectional view of the writing instrument with the erasing member shown in (a), (c) is (b) It is the partial expanded sectional view which partially expanded the back side of the writing instrument with an erasure | elimination member shown to. (A) is a front view showing a state where the crown is removed from the writing instrument with the erasing member shown in FIG. 1 (a), (b) is a crown with the writing tool with the erasing member shown in FIG. 1 (b) (C) is a partial expanded sectional view which shows the state which removed the crown from the state shown in FIG.1 (c). The structure of the crown of 1st Example used for the writing instrument with the erasure | elimination member of 1st form of this invention is shown, (a) is the perspective view which looked at the crown from the knocking bar insertion side, (b) is. (C) is a front view of the canopy, (d) is a left side view of the canopy, (e) is a right side view of the canopy, (f) is a perspective view of the canopy It is a sectional view of the direction of an axis. The structure of the knock bar of 1st Example used for the writing instrument with the erasure | elimination member of 1st form of this invention is shown, (a) is the perspective view which looked at the knocking bar from the front end side of a writing instrument, (b) is. (C) is a front view of the knock rod, (d) is a left side view of the knock rod, (e) is a right side view of the knock rod, and (f) is the knock rod It is a sectional view of the direction of an axis. (A) is a perspective view showing an operation of attaching the crown shown in FIG. 3 to the knock rod from the rear end side of the writing instrument provided with the knock rod shown in FIG. 4; (b) from the state shown in (a) It is a perspective view which shows the state in which the crown was attached to the knock bar. Usable combination of the rear end portion of the knock bar according to the first to third embodiments used in the writing instrument with the erasing member according to the first aspect of the present invention and the crown of the first to third embodiments attached thereto FIG. The structure of the crown of 4th Example used for the writing instrument with the erasure | elimination member of 1st form of this invention is shown, (a) is the perspective view which looked at the crown from the knocking bar insertion side, (b) is. (C) is a front view of the crown, (d) is a left side view of the crown, (e) is a right side view of the crown, (f) is (d) It is sectional drawing in the AA of the crown shown to. (A) is a front view in writing state of the writing instrument with erasing member of the second embodiment of the present invention, (b) is a longitudinal sectional view of the writing instrument with erasing member shown in (a), (c) is in (b) It is the partial expanded sectional view which partially expanded the back side of the writing instrument with an erasure | elimination member shown. (A) is a front view showing a state in which the crown is removed when the writing instrument with erasing member shown in FIG. 8 (a) is in the non-writing state, (b) is the writing instrument with erasing member shown in FIG. 8 (b) Is a longitudinal cross-sectional view showing a state in which the crown is removed in the non-writing state, and (c) is a partially enlarged cross-sectional view showing a state in which the crown is removed from the state shown in FIG. The structure of the crown of 5th Example used for the writing instrument with the erasure | elimination member of 2nd form of this invention is shown, (a) is a top view of a crown, (b) is the base side of a clip on a crown. (C) is a front view of the crown, (d) is a left side view of the crown, (e) is a right side view of the crown, (f) is the crown from the tip side of the clip It is the perspective view seen and (g) is a sectional view in the direction of an axis of a crown. (A) shows the structure of the erasing member side knocking rod of the knock rod of the fourth embodiment used for the writing instrument with the erasing member of the second embodiment of the present invention, and (a) shows the erasing member side knocking rod (B) is a perspective view of the erasing member side knock rod seen from the rear side, (c) is a front view of the erasing member side knock rod, (d) is a erasing member side knock rod Left side view, (e) is a right side view of the erasing member side knock rod, (f) is a front view of the erasing member side knock rod of the fifth embodiment, (g) is an axial direction of the erasing member side knock rod FIG. (A) is a front view showing how the erasing member-side knock bar shown in FIG. 11 is coupled to the cam-side knock bar in the fourth embodiment, (b) is a sectional view of (a), (c) 2.) is a front view of a state in which the erasing member side knocking rod is coupled to the cam side knocking rod. (A) is a perspective view showing an operation of attaching the crown shown in FIG. 10 to the knocking bar from the rear end side of the writing instrument with the erasing member shown in FIG. 12 (c); It is a perspective view which shows the state in which the crown was attached to the knock bar from the state shown to a). (A) is a cross-sectional view of the crown of the sixth embodiment used for the writing instrument with the erasing member of the second embodiment, (b) is a cross section of the crown of the seventh embodiment used for the writing instrument with the erasing member of the second embodiment FIG. It is a front view of a crown of a 8th example used for a writing instrument with an elimination member of a 2nd form.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. Corresponding components are given the same reference numerals throughout the drawings.

FIG. 1 (a) is a front view of a writing instrument 1 with an erasing member according to a first embodiment of the present invention in which the crown 10 of the first embodiment is attached and in a non-writing state. ) Shows a longitudinal cross section of the writing instrument 1 with an erasing member shown in FIG. As shown in FIG. 1 (a), the writing instrument with erasing member 1 of the first embodiment is a knock-type writing instrument, the clip 9 is provided on the main body, and the crown 10 is provided on the opposite side of the writing side. There is. In the following description, the writing side is referred to as the front or the front, and the opposite side of the writing is referred to as the back or the back. Moreover, the writing instrument 1 with the erasing member is hereinafter also referred to as a knock type writing instrument 1. The knock-type writing instrument 1 includes an inner cylinder 8 whose axial cylinder is provided with a front shaft 2, a rear shaft 3 and a clip 9.

  Further, as shown in FIG. 1 (b), the refill 5 which is a writing material having a writing part 5a at one end inside the front shaft 2, the rear shaft 3 and the inner cylinder 8 of the knock type writing instrument 1; There is a spring 6 which biases 5 rearward and a knock mechanism 50 disposed at the rear end (rear end) of the rear shaft 3. The refill 5 contains, for example, a thermochromic ink which becomes transparent by discoloration due to frictional heat when rubbed with an erasing member described later, or an ink which can be peeled off from the paper with an erasing member described later. Do.

  The knock mechanism 50 includes a knock rod 30 connected to the crown 10 and a rotor 60 provided between the knock rod 30 and the refill 5. The front side of the front shaft 2 is formed in a tapered shape, and a through hole 2a for causing the writing portion 5a of the refill 5 to protrude is formed at an end (front end) of the front side. When a knocking operation is performed to press the crown 10, the writing portion 5a of the refill 5 protrudes from the through hole 2a by the knock rod 30 and the rotor 60, and the writing portion 5a is accommodated inside the through hole 2a. Become unwritten.

  Further, an erasing member 7 is attached to the rear end (rear end) of the knock rod 30. The erasing member 7 can be attached to the knocking bar 30 by fitting (press-fitting), bonding, two-color molding or the like. Then, the crown 10 is attached to the rear end of the knock rod 30 so as to cover the erasing member 7. The rear side of the front shaft 2 is inserted into the front end of the rear shaft 3 and screwed. The inner cylinder 8 may be integrally formed with the rear shaft 3, and the front shaft 2 and the rear shaft 3 may be integrally formed. In addition to this, the knock lock member 4 is disposed in front of the knock mechanism 50, that is, in front of the knock rod 30 in the shaft cylinder.

The knock lock member 4 is movable in the back and forth direction in the rear shaft 3 by gravity, and when the writing portion 5a is directed downward and the knock lock member 4 moves in the rear shaft 3 to the front shaft 2 side, the knock mechanism It enables knock operation by the crown 10 without affecting 50. On the other hand, when the erasing member 7 faces downward and the knock lock member 4 moves in the rear shaft 3 toward the rotor 60, the knock mechanism 50 acts on the knock mechanism 50 so that the knock operation by the crown 10 can not be performed. This is because it is better to fix the erasing member 7 with respect to the main body when the crown 10 is removed and the handwriting on the sheet is erased using the erasing member 7.

  The present invention is directly directed to 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, and the operation / non-operation of the rotor by the movement of the knock lock member 4 according to the present invention. Since it has nothing to do with this, no further explanation will be given.

  FIG. 1 (c) is a partially enlarged view of the rear side of the knock type writing instrument 1 shown in FIG. 1 (b). An erasing member mounting hole 37 is provided at the rear end of the knocking rod 30, and the erasing member 7 is provided in the erasing member mounting hole 37 by fitting, press-fitting, or bonding. Further, the erasing member 7 can be provided on the knock rod 30 by two-color molding or the like. A crown 10 covering the erasing member 7 is detachably attached to the rear end of the knock rod 30.

FIG. 2 (a) shows the knock-type writing instrument 1 shown in FIG. 1 (a) with the crown 10 removed, and FIG. 2 (b) shows the knock-type writing instrument shown in FIG. 2 (a) 1 shows a longitudinal section of 1; Further, FIG. 2 (c) shows a state in which the crown 10 is removed from the rear end portion of the knock rod 30 from the state shown in FIG. 1 (c). When the crown 10 is removed, the erasing member 7 is exposed. Here, the structure of the first embodiment of the crown 10 used for the knock type writing instrument 1 of the first embodiment and the structure of the knock rod 30 will be described with reference to FIGS. 3 to 5.

  FIG. 3 (a) shows the crown 10 of the first embodiment as viewed from the insertion side (front) of the knock rod, and FIG. 3 (b) shows the crown 10 shown in FIG. 3 (a) on the opposite side. From the perspective of 3 (c) is a front view of the crown 10 shown in FIG. 3 (a), and FIG. 3 (d) is a left side of the crown 10 shown in FIG. 3 (d). FIG. 3 (e) is a right side view of the crown 10. FIG. Furthermore, FIG. 3 (f) shows an axial cross section of the crown 10.

  The crown 10 of the first embodiment is provided with a bottom surface 15 at one end of a cylindrical cylinder, and projections 11 are provided on the inner peripheral surface near the opening 16 at predetermined equal intervals. It is Although the number of the protrusions 11 is four in the first embodiment, the number of the protrusions 11 is not particularly limited. However, when attaching the crown 10 to the knock bar, it is desirable that the protrusions 11 be provided at equal intervals so as to be attached with a uniform pressing force. The height from the inner circumferential surface of the crown 10 of the projection 11 is very small as can be seen from FIG. 3 (d). Further, the outer shape of the projection 11 is an oval or an oval. The top surface of the projection 11 in this embodiment is flat, but may be raised in a dome shape.

  On the other hand, on the outer peripheral surface of the crown 10, a plurality of rib-like projecting portions 14 parallel to the axis of the crown 10 are provided. The protrusions 14 are projected on the outer peripheral surface of the crown 10 at equal intervals radially about the axis of the crown 10. The protrusions 14 are tapered on the side where the bottom surface 15 of the crown 10 is located. Thus, the height of the crown 10 from the outer peripheral surface of the crown 10 is gradually reduced. The outer peripheral surface of the crown 10 between the projecting portion 14 and the projecting portion 14 is a groove 13 connecting the crown 10 in the front-rear direction, and this becomes an airway at the time of accidental ingestion of the crown 10, No vent is provided on the bottom surface 15 of the crown of the first embodiment.

  FIG. 4A shows the knock rod 30 of the first embodiment provided with the erasing member 7 in the knock mechanism 50 of the knock type writing instrument 1 shown in FIGS. 1B and 2B. . 4 (b) is a view from the opposite side of the knock bar 30 shown in FIG. 4 (a), and FIG. 4 (c) is a front view with the knock bar 30 shown in FIG. 4 (a) sideways. From the perspective of And FIG.4 (d) looks at the knock rod 30 shown in FIG.4 (c) from the left side, and FIG.4 (e) is seen from the right side. Further, FIG. 4 (f) shows an axial cross-section of the knock rod 30 shown in FIG. 4 (c).

  The knock rod 30 of the first embodiment has a large diameter portion 33 connected to the rotor of the knock mechanism, and adjacent to the large diameter portion 33 is a small diameter portion 34 which is a mounting portion of the crown 10. A protrusion is formed on the outer peripheral surface on the rotor side (front) of the large diameter portion 33, a cam is formed on the front end portion, and a communication hole 39 communicating with an erasing member mounting hole 37 described later is provided inside. The projections and cams are not directly related to the present invention, and thus the description thereof is omitted here.

  The small diameter portion 34 has a diameter slightly smaller than that of the large diameter portion 33. As shown in FIG. 4F, an erasing member attachment hole 37 for holding the erasing member 7 is provided in the inside of a part of the large diameter portion 33 and the inside of the small diameter portion 34. The erasing member attachment hole The erasing member 7 is attached to 37. As described above, the erasing member 7 is fitted, press fitted, or adhered to the erasing member mounting hole 37 as a separate part, or is provided by two-color molding together with the large diameter portion 33 and the small diameter portion 34. The diameter of the erasing member 7 is smaller than the inner diameter of the crown 10 described in FIG.

  Further, on the outer peripheral surface of the small diameter portion 34, a ridge 32 is provided in an annular shape. The height from the outer peripheral surface of the small diameter portion 34 of the protrusion 32 is very small, and the distance between the protrusion 32 and the large diameter portion 33 is the opening 16 of the crown 10 shown in FIG. And the distance from the end of the projection 11 on the bottom surface 15 side. For this reason, when the crown 10 is attached to the knock rod 30, the projection 11 passes over the ridge 32, and the projection 11 is locked by the ridge 32, as shown in FIG. 1 (c).

  FIG. 5 (a) shows an operation of attaching the crown 10 shown in FIG. 3 to the knock rod 30 from the rear end side of the knock type writing instrument 1 equipped with the knock rod 30 shown in FIG. The knock rod 30 is attached to the knock-type writing instrument 1 in a state in which the tip end of the small diameter portion 34 and the erasing member 7 protrude from the opening 8 a at the rear end of the inner cylinder 8 of the knock-type writing instrument 1. When the crown 10 is attached to the rear end side of the knock type writing instrument 1, the crown 10 is put on the erasing member 7 and inserted into the inner cylinder 8 from the opening 8 a. Then, the protrusion 11 provided on the inner circumferential surface of the crown 10 is attached to the knock rod 30 over the ridge 32 of the small diameter portion 34.

  FIG. 5B shows a state in which the crown 10 is inserted into the inner cylinder 8 of the knock type writing instrument 1 from the state shown in FIG. 5A and attached to the knock bar 30. In this state, as shown in FIG. 1C, the protrusion 11 provided on the crown 10 passes over the ridge 32 and the outer peripheral surface of the small diameter portion 34 between the ridge 32 and the large diameter portion 33 It is located, and the protrusion 11 and the protrusion 32 are engaged. As a result, it becomes difficult for the crown 10 attached to the knock rod 30 to come off from the rear end of the knock type writing instrument 1. And, by providing the groove 13 and the projecting portion 14 in the crown 10, the crown 10 can be easily grasped, and the crown 10 can be easily removed from the knock rod 30. The number of protrusions 14 and the depth and shape of the grooves 13 are not particularly limited, as long as the crown 10 inserted in the knock rod 30 can be easily removed. Therefore, for example, when the crown 10 is made of metal, the outer surface of the crown 10 may be knurled, textured, or the like.

  The crown 10 of the first embodiment is provided with the projections 11 on the inner peripheral surface thereof, and the knock rod 30 of the first embodiment is provided with the annular ridge 32 on the outer peripheral surface of the small diameter portion 34 It was The crown 10 of the first embodiment is shown in cross section in the top right figure of FIG. 6 and the knock rod 30 of the first embodiment in the top left figure of FIG. Only shown.

  On the other hand, regarding the crown, the crown 10A of the second embodiment shown in a cross-sectional view in the center right of FIG. 6 and the crown 10B of the third embodiment shown in a cross-section in the bottom right of FIG. It is possible. The crown 10A of the second embodiment is provided with an annular ridge 12 in place of the projection on the inner peripheral surface. The crown 10B of the third embodiment is provided with an annular groove 18 on the inner peripheral surface. The position of the annular groove 18 is closer to the bottom surface 15 side than the position of the projection 11 in the crown 10 of the first embodiment, and is a position for receiving the ridge 32 at the time of coupling with the knock rod 30 of the first embodiment.

As for the knocking rod, the knocking rod 30A of the second embodiment in which the rear end is shown in the center left of FIG. 6 and the third embodiment in which the rear end is shown in the lowermost left of FIG. Knock bar 30B is possible. The knocking rod 30A of the second embodiment is provided with projections 31 provided on the outer peripheral surface of the small diameter portion 34 at predetermined intervals instead of the ridges. The knock rod 30B of the third embodiment has an annular groove 38 on the outer peripheral surface of the small diameter portion 34 for receiving the projection 11 of the crown 10 of the first embodiment or the ridge 12 of the crown 10A of the second embodiment. is there. Therefore, the position of the annular groove 38 is closer to the large diameter portion 33 than the position from the large diameter portion 33 of the protrusion 32 in the knock rod 30 of the first embodiment.

Figure 6 is a crown 10 of the first embodiment, the crown 10B of crown 10A and the third example of the second embodiment, the knock bar 30 of the first embodiment, the knock rod 30A of the second embodiment And possible combinations of the knock rod 30B of the third embodiment are indicated by arrows. The crown 10 of the first embodiment can be combined with the knock rods 30, 30B of the first and third embodiments. In addition, the crown 10A of the second embodiment can be combined with all of the knock rods 30, 30A, and 30B of the first to third embodiments. Furthermore, the crown 10B of the third embodiment can be combined with the knock rods 30, 30A of the first and second embodiments.

  FIGS. 7 (a) to 7 (f) show the structure of the crown 10C of the fourth embodiment used for the knock-type writing instrument 1 of the first embodiment of the present invention, and FIGS. 3 (a) to 3 (f) In the same state as the crown 10 of the first embodiment shown in FIG. The crown 10C of the fourth embodiment differs from the crown 10 of the first embodiment only in that a vent hole 17 for securing the ventilation amount by the bottom surface 15 is provided. In the crown 10C of the fourth embodiment, although the air vents 17 are arc-shaped long holes and two vents are provided, the shape and the number of the air vents 17 are not particularly limited, and it is only necessary to increase the air permeability.

  FIG. 8 (a) is a front view of the knock type writing instrument 1A of the second embodiment of the present invention in which the crown 20 of the fifth embodiment is attached and in a writing state, and FIG. 8 (b) is. The longitudinal section of knock type writing instrument 1A shown in Drawing 8 (a) is shown. 9 (a) is a front view of the knock-type writing instrument 1A shown in FIG. 8 (a) with the crown 20 removed in a non-writing state, and FIG. 9 (b) is a view shown in FIG. The longitudinal section of knock type writing instrument 1A shown to (a) is shown. Further, FIG. 8 (c) is a partially enlarged view of the rear end of FIG. 8 (b), and FIG. 9 (c) is a rear end of the knock type writing instrument 1A shown in FIG. 9 (b). It is shown partially enlarged.

  The structure of the main body of the knock type writing instrument 1A of the second embodiment is the same as that of the knock type writing instrument 1 of the first embodiment, and the main body is provided with the front shaft 2, the rear shaft 3 and the inner cylinder 8. Similar to the knock-type writing instrument 1 in that the refill 5, the spring 6 and the knock mechanism 50 are provided inside the front shaft 2, the rear shaft 3 and the inner cylinder 8 of the knock-type writing instrument 1A. The knocking mechanism 50 has a knocking bar 40 and a rotor 60 provided between the knocking bar 40 and the refill 5. The rotor 60 is the same as the knocking writing instrument 1, but the structure of the knocking bar 40 is knocked It differs from the structure of the knocking bar 30 of the writing instrument 1. The structure of the knocking rod 40 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 part 5a of the refill 5 is formed at the front end (front end) as in the knock type writing tool 1 is there. Also in the knock type writing instrument 1A of the second embodiment, when the knocking operation to press the crown 20 is performed, the writing portion 5a of the refill 5 protrudes from the through hole 2a by the knock rod 40 and the rotor 60 (FIG. a), (b), and the non-writing state (Fig. 9 (a), (b)) in which the writing part 5a is accommodated inside the through hole 2a. The function of the knock lock member 4 disposed in front of the knock rod 40 is also the same as the function of the knock lock member 4 in the knock type writing instrument 1 of the first embodiment, and is not directly related to the present invention. Description of is omitted.

The second embodiment knock type writing instrument 1A differs from the first embodiment knock type writing instrument 1 in that the clip 9 is provided on the outer peripheral surface 21 of the crown 20, and the knock rod 40 has a cam side knock rod 41 It is a point divided into the erasing member side knock rod 42. Although the knocking bar 40 is normally integrated, the erasing member side knocking bar 42 is separable from the cam side knocking bar 41. As shown in FIGS. 8C and 9C, the cam side knock rod 41 is coupled to the rotor 60, and the erasing member 7 is inserted into the erasing member attachment hole 47 provided in the erasing member side knock rod 42. Is attached.

  The crown 20 of the fifth embodiment is attached to the erasing member side knock rod 42. The erasing member 7 is attached to the erasing member-side knock rod 42 by adhesion, but the erasing member 7 can be provided on the erasing member-side knock rod 42 by two-color molding or the like. The joint between the cam side knock bar 41 and the erasing member side knock bar 42 is exposed to the outside from the opening 8a of the inner cylinder 8 even when the knock type writing instrument 1A is in the writing state. Here, the crown 20 and the knock bar 40 will be described with reference to FIGS. 10 to 13.

  FIGS. 10 (a) to 10 (f) are views of the crown 20 of the fifth embodiment used for the knock-type writing instrument 1A of the second embodiment of the present invention as viewed from various directions. ) Shows a cross section of the crown 20 in the axial direction. The crown 20 covers the erasing member attached to the end of the knocking bar to protect it from debris and hand marks, and can be removed from the knocking bar when the erasing member is used. Although the clip 9 is attached to the outer peripheral surface of the crown 20, there is no protrusion on the inner peripheral surface 22 of the crown 20, and the inner diameter of the inner peripheral surface 22 is slightly from the bottom surface 26 toward the opening 27. It is getting bigger.

  FIGS. 11 (a) to 11 (e) are views of the erasing member side knock bar 42 of the knock bar 40 of the fourth embodiment used for the knock type writing instrument 1A of the second embodiment of the present invention from various directions. FIG. 11G shows a cross section of the erasing member side knock rod 42 in the axial direction. The erasing member side knock rod 42 has a coupling portion 43 coupled to the cam side knock rod 41, an erasing member holding portion 44 for holding the erasing member 7, and a flange portion provided between the coupling portion 43 and the erasing member holding portion 44. There are 45. Two annular coupling protrusions 46 are provided on the outer peripheral surface of the coupling portion 43, and an annular engagement projection 48 is also provided on the outer peripheral surface of the erasing member holding portion 44. The engagement protrusions 48 have a height that slightly rises from the outer peripheral surface.

  In the fourth embodiment, although the annular engagement protrusion 48 is provided on the erasing member side knock rod 42, the engagement protrusion 48 is formed as the engagement protrusions 48A arranged in an annular shape as shown in FIG. The erasing member side knocking rod 42A of the fifth embodiment is also possible. Further, the erasing member holding portion 44 has an erasing member mounting hole 47, and the erasing member 7 is mounted in the erasing member mounting hole 47. The erasing member 7 can be bonded to the erasing member mounting hole 47 as a separate member, or can be formed together with the erasing member holding portion 44 by two-color molding.

  12 (a) shows the erasing member side knock rod 42 of the fourth embodiment described in FIG. 11 together with the cam side knock rod 41, and FIG. 12 (b) shows the cam shown in FIG. 12 (a). The cross section of the side knocking bar 41 and the erasing member side knocking bar 42 is shown. The cam side knock rod 41 is provided with a communication hole 39 for receiving the coupling portion 43 of the erasing member side knock rod 42, and the inner peripheral surface of the communication hole 39 is the outer periphery of the coupling portion 43 of the erasing member side knock rod 42. Two connecting projections 49 are provided for locking the two connecting projections 46 provided on the surface. When the erasing member side knock rod 42 is coupled to the cam side knock rod 41, a knock rod 40 as shown in FIG. 12C is formed.

  FIG. 13 (a) shows an operation of attaching the crown 20 shown in FIG. 10 to the knock rod 40 from the rear end side of the knock type writing instrument 1A provided with the knock rod 40 shown in FIG. 12 (c). is there. The knocking rod 40 is a knocking type in a state where the erasing member side knocking rod 42 provided with the cam side knocking rod 41 and the erasing member 7 protrudes from the opening 8a at the rear end of the inner cylinder 8 of the knocking type writing instrument 1A. It is attached to the writing instrument 1A. When the crown 20 is attached to the rear end side of the knock type writing instrument 1A, the crown 20 is put on the erasing member 7 and mounted on the erasing member side knock rod 42. As a result, the tapered inner peripheral surface of the crown 20 is frictionally coupled to the engagement projection 48 formed on the outer peripheral surface of the erasing member holding portion 44 of the erasing member side knock rod 42, and the erasing member side knock rod 42 Attached to

  FIG. 13 (b) shows the crown 20 attached to the knock bar 40 from the state shown in FIG. 13 (a). In this state, as shown in FIG. 8C, the inner peripheral surface of the crown 20 is frictionally coupled to the engagement projection 48 formed on the outer peripheral surface of the erasing member holding portion 44 of the erasing member side knock rod 42. Is engaged with the erasing member side knock rod 42. Since the crown 9 is provided with the clip 9, the crown 20 can be easily attached to and removed from the erasing member side knock rod 42 by using the clip 9. Alternatively, the erasing member side knock rod 42 can be removed from the cam side knock rod 41 and the erasing member 7 can be used.

  FIG. 14A shows a cross section of a crown 20A of a sixth embodiment used for the knock type writing instrument 1A of the second embodiment. In the crown 20 of the fifth embodiment, no protrusion is provided on the inner circumferential surface of the crown 20, but in the vicinity of the opening 27 on the inner circumferential surface 22 of the crown 20A of the sixth embodiment. A protrusion 23 slightly protruding from the inner circumferential surface 22 is provided. When the crown 20A of the sixth embodiment is attached to the erasing member side knocking rod 42, the projection 23 is between the engaging projection 48 of the erasing member holding portion 44 and the flange portion 45 shown in FIG. Since it fits in a part, the engagement intensity | strength of crown 20A and the erasure member side knock rod 42 can be increased. However, since the engagement between the projection 23 and the engagement projection 48 of the erasing member holding portion 44 is not so strong, if the clip 9 provided in the crown 20A is used, the erasing member side knocking bar 42 The crown 20A can be easily attached and detached.

  FIG. 14 (b) shows a cross section of a crown 20B of a seventh embodiment used for the knock type writing instrument 1A of the second embodiment. In the crown 20 of the fifth embodiment, no protrusion is provided on the inner circumferential surface of the crown 20, but in the vicinity of the opening 27 on the inner circumferential surface 22 of the crown 20B of the seventh embodiment. A projection 24 slightly projecting from the inner circumferential surface 22 is provided. When the crown 20B of the seventh embodiment is attached to the erasing member side knocking rod 42, a portion between the engaging projection 48 of the erasing member holding portion 44 and the flange portion 45 of which the projection 24 is shown in FIG. Thus, the engagement strength between the crown 20B and the erasing member side knocking bar 42 can be increased. However, since the engagement between the projection 24 and the engagement protrusion 48 of the erasing member holding portion 44 is not so strong, the clip 9 provided on the crown 20B can be used to the knocking member 42 on the erasing member side. The crown 20B can be easily attached and detached.

FIG. 15 shows a crown 20C of an eighth embodiment used for the knock-type writing instrument 1A of the second embodiment. The crown 20C of the eighth embodiment has the crowns 10, 10A, 10B and 10C of the first to fourth embodiments in the portion where the clip 9 is not provided on the outer peripheral surface 21 of the crown 20 of the fifth embodiment. Similarly, a plurality of rib-like projecting portions 25 parallel to the axis of the crown 20C are provided. The protrusions 25 may project radially at equal intervals around the axis of the crown 20C at a portion where the clip 9 is not provided on the outer peripheral surface of the crown 20C. A tapered portion 25 a is provided on the side where the bottom surface 26 of the crown 20 C of the projecting portion 25 is located. With the projection 25 on the outer circumferential surface 21 of the crown 20C, the crown 20C can be easily grasped, and the attachment and detachment between the crown 20C and the erasing member-side knock rod 42 can be further facilitated. The shape and the number of the protrusions 25 are not particularly limited, as long as the crown 20C can be easily grasped. Therefore, for example, when the crown 20C is made of metal, the outer surface of the crown 20C may be knurled.

  As explained above, in the knock type writing instrument of the present invention, the erasing member 7 is erased because it is covered by the crowns 10, 10A, 10B, 10C, 20, 20A, 20B or 20C except when used. It is possible to prevent the contamination of the member 7. Also, crowns 10, 10A, 10B, 10C, 20, 20A, 20B or 20C can be easily attached to the knock bar and the crown attached to the knock bar can be easily removed from the knock bar Can.

  The thermochromic ink is accommodated in the refill which is a cursive in the above-described embodiment. 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 surface of the sheet when the sheet is rubbed, and the generated frictional heat causes handwriting of the knock-type writing instrument. The heat can be discolored. In addition, as a writing material, the ball-point pen which accommodated the thermochromic ink, the mechanical pencil which accommodated the thermochromic core, or a pencil holder etc. can be considered. Also, it is possible to use a knock type writing instrument in which the refill contains an erasable eraser erasable ink. In this case, as the erasing member, a member that wears when the ink is peeled off from the paper surface is selected as in the case of the eraser.

  Here, the thermochromic ink maintains a predetermined color (first color) at normal temperature (for example, 25 ° C.), and when heated up to a predetermined temperature (for example, 65 ° C.), changes to another color (second color) The ink has the property of returning to the original color (first color) again when cooled to a predetermined temperature (for example, -10.degree. C.). In the writing instrument 1 using the thermochromic ink, to make the second color colorless and to heat the drawn line drawn in the first color (for example, red) to make it colorless is referred to as "erasing". Therefore, the writing surface or the like on which the drawn line has been written is abraded with a friction member as an erasing member to generate frictional heat, thereby changing the drawn line to colorlessness, ie, erasing it. As a matter of course, the second color may be a color other than colorless.

  In a writing instrument using a refill containing an eraser erasable ink erasable with an eraser, the eraser erasable ink is the total amount of water and non-thermoplastic colored resin particles having an average particle diameter of 1.0 to 15 μm. And 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 consist 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 coloring agent composed of a pigment is dispersed, colored resin particles coated on the surface of the resin particle with a coloring agent composed of a pigment, colored resin particles in which a coloring agent composed of a dye is dyed on resin particles Can be mentioned.

  In this embodiment, if the colored resin particles are non-thermoplastic and satisfy the above average particle diameter, the structure (hollow structure, no hollow structure (solid)), shape (spherical, polygonal, flat) The fibrous form is not particularly limited, but preferably, it has a glass transition point of 150 ° C. or higher and a thermal decomposition temperature in view of exhibiting excellent erasability of eraser, writability, and temporal stability as an ink. A spherical colored resin fine particle having an intramolecular cross-linking particle which has a melt flow index value of less than 0.1, is not tacky, and has an average particle diameter of 1.0 to 15 μm. Use is desirable.

  As materials for forming the erasing member, rubber elastic materials such as rubber materials such as silicone rubber, nitrile rubber, ethylene propylene rubber, ethylene propylene diene rubber, etc., thermoplastic elastomers such as styrene elastomer, olefin elastomer, polyester elastomer, 2 types A mixture of the above rubber elastic material, a mixture of a rubber elastic material and a synthetic resin, a commercially available eraser, and the like can be mentioned.

  The erasing member is formed of a mixture of a polypropylene resin and a styrene thermoplastic elastomer, or a mixture of a polypropylene resin and a polypropylene thermoplastic elastomer, when it is a thermochromic writing instrument, and the blending ratio thereof is 1: 1 by weight ratio respectively It is a material specified by JIS S 6050-2002 that is 1 to 4: 4 and does not contain an abrasive, a plasticizer and a filler, and the durometer hardness A specified in JIS K6251 is 70 ° to 100 °. It is formed of a low-abrasive elastic material containing no plasticizer, which has an erase capacity (erasing rate) of 70% or less. Accordingly, the erasing member is effective because it is hard to cause scum on rubbing and has excellent thermochromic properties.

  The term "erasing" in the present invention refers to adsorption or scraping of drawn lines, characters and the like in an eraser such as an eraser, in addition to the case where the thermochromic ink is used. Furthermore, the pressure-sensitive touch pen, the shaft cylinder or the like may be made conductive to provide an erasing member and a crown at the rear end of the capacitive touch pen. Therefore, the present invention is also applicable to any stationery provided with an erasing member that can erase strokes (strokes) written by a writing instrument.

1, 1A Writing instrument with eraser (Knock type writing instrument)
Reference Signs List 7 eraser member 8 inner cylinder 9 clip 10, 10A, 10B, 10C, 20, 20A, 20B, 20C sky crown 11, 24, 31 protrusion 12, 23, 32 protrusion 13 groove 14, 25 protrusion 30, 30A, 30B , 40 knocking bar 41 cam side knocking bar 42 erasing member side knocking bar

Claims (2)

There is provided at the rear end of the barrel an erasable member capable of erasing the handwriting written on the paper surface, and at the rear end of the barrel is attached a crown that covers and protects the eraser , knocking the crown. Therefore, there is a refill for writing in which the thermochromic ink is contained inside the cylinder, and the handwriting written by the refill is the erasing member. In the writing instrument with a knock-type erasing member , which can be thermally discolored by frictional heat generated when it is rubbed by
The erasing member is provided in a cylinder of the writing tool, and is fitted to a knock bar located closest to the rear end portion of a knock mechanism that causes the pen tip of the refill to perform a withdrawal operation by a knock operation of the crown. Connect by
The knocking bar is provided with a divided portion so as to be divided into the erasing member side knocking bar and the nib side knocking bar.
The crown is formed with a clip on the outer peripheral surface thereof so as to be removable from the erasing member side knock bar;
The erasing member side knocking bar and the divided portion of the pen point side knocking bar are exposed to the outside from the rear end portion of the shaft cylinder even when the knock type writing tool is in a writing state, and the erasing member side knocking bar A writing instrument with an erasing member characterized in that the pen tip can be divided from the knock bar . The writing instrument with the erasing member according to claim 1 , wherein a rib-like protruding strip formed in a plurality of lines in the axial direction is formed on the outer peripheral surface of the crown in a portion excluding the clip . .

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