JP7018916B2 - Stationery with erasing member - Google Patents

Description

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

In recent years, writing tools such as ballpoint pens and color markers using heat-discolorable ink have become widespread. A friction body made of an elastic material is provided behind the barrel of a writing instrument using such a heat-discoloring ink (the pen tip side of the writing instrument is the front and the opposite side is the rear), and writing is performed. The heat generated by rubbing the written handwriting with a rubbing body causes the heat-discoloring ink to heat-discolor and erase the handwriting. The handwriting mentioned here means both the characters and the pictures written on the paper (see Daijirin 3rd Edition).

In a writing tool using such a heat-discolorable ink, since the friction body is provided in a state of being exposed behind the barrel, dust and hand stains may adhere to the friction body when not in use. For this reason, if the handwriting is rubbed with a friction body to which dust or hand stains are attached after writing, the dust or hand stains may move to the paper surface and stain the paper surface.

Therefore, Patent Document 1 discloses a thermochromic writing tool 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 barrel of a writing tool to which the friction body is attached in an exposed state, and a female screw is formed on the inner peripheral surface of the opening of the cover to be covered with the friction body. Then, the cover is screwed to the rear end of the barrel to hide the friction body when not in use.

Then, in Patent Document 1, the cover is screwed to the rear end of the shaft so that the cover screwed to the rear end of the shaft of the writing tool does not come off from the rear end of the shaft. When the cover is put on the friction body, the bottom of the cover is pressed against the friction body so that the elastic force of the friction body is applied to the screwed portion. Further, in Patent Document 1, when a sponge is attached to the bottom of a cover or a brush is attached and the cover is screwed into a cursive barrel, the elastic force of the sponge or brush is applied to the screwed portion. The structure on which it acts is also disclosed.

However, in the heat-discolorable writing tool described in Patent Document 1, it is necessary to rotate the cover and the rear end of the shaft many times relative to each other before the cover is completely screwed to the rear end of the shaft. There is a problem that it takes time to attach the cover to 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 axle tube is high, if the cover and the rear end of the axle tube are stopped in the middle of the process because the attachment is considered complete, the cover and the rear end of the axle tube will be used. There was also a problem that the screw strength was small and the cover came off and the cover was lost.

Therefore, a protrusion is provided on the cover (hereinafter referred to as a crown) in the inner peripheral direction, and a protrusion that engages with the protrusion on the crown side is provided on the outer peripheral surface of the rear end portion of the barrel provided with the friction body. When attaching the crown to the barrel, the protrusion on the crown side overcomes the ridge provided on the outer peripheral surface of the rear end of the barrel and is locked to the ridge, so that the crown is attached to the barrel. Patent Document 2 discloses a structure to be attached to the rear end portion.

Japanese Unexamined Patent Publication No. 2014-124810 Japanese Unexamined Patent Publication No. 2014-141707

However, in the thermochromic writing tool described in Patent Document 2, the protrusion provided on the inner peripheral surface on the crown side is made to overcome the ridge on the rear end side of the barrel, and the crown is moved to the rear end of the barrel. It is a structure to be attached to a portion, and there is no problem when attaching the crown, but there is a problem that the crown is difficult to remove from the rear end of the barrel when the crown is removed from the rear end of the barrel. This is because when fitting the crown to the rear end of the axle, it is easy to push in by pushing the end face of the rear end of the crown, but when removing the crown from the rear end of the axle, This is because it is difficult to grip the crown because it is removed by holding the side surface of the crown.

INDUSTRIAL APPLICABILITY According to the present invention, a crown, which is a protective member (cover) for protecting the erasing member of a writing instrument with an erasing member, can be easily attached to the rear end portion of the barrel of the writing instrument, and the rear end of the barrel of the writing instrument can be easily attached. It is an object of the present invention to provide a writing instrument with an erasing member that can be removed from the portion.

According to one aspect of the present invention, an erasing member capable of erasing handwriting written on a paper surface is provided at the rear end of the barrel, and a crown that covers and protects the erasing member is attached to the rear end of the barrel. A writing tool with an erasing member is provided, wherein the writing tool with an erasing member is provided with a protrusion on the outer peripheral surface of the crown to assist in gripping the crown.

The protrusion may be a rib-shaped ridge formed in a plurality of rows in the axial direction of the outer peripheral surface. Further, the protruding portion can be a clip formed on the outer peripheral surface of the crown. Further, there is a refill for writing in which the heat-discolorable ink is contained inside the barrel, and the handwriting written by the refill can be thermally discolored by the frictional heat generated when the refill is scraped by the erasing member.

The following modes can be considered as a mechanism for attaching the crown to the rear end of the barrel.
(A) A first ridge is provided on the inner peripheral surface of the crown, a second ridge is provided on the outer peripheral surface of the rear end of the barrel, and the first ridge overcomes 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 peripheral surface of the crown, a plurality of protrusions are provided on the outer peripheral surface of the rear end of the barrel, the ridge overcomes the protrusion, and the crown is attached to the rear end of the barrel. Aspects.
(C) A plurality of protrusions are provided on the inner peripheral surface of the crown, protrusions are provided on the outer peripheral surface of the rear end of the barrel, the protrusions overcome the protrusions, and the crown is attached to the rear end of the barrel. Aspects.
(D) A ridge is provided on the inner peripheral surface of the crown, a circumferential groove is provided on the outer peripheral surface of the rear end of the barrel, the ridge fits into the circumferential groove, and the crown is the rear end of the barrel. A mode to be attached to the part.
(E) A circumferential groove is provided on the inner peripheral surface of the crown, a ridge is provided on the outer peripheral surface of the rear end of the barrel, the ridge fits in the circumferential groove, and the crown is the rear end of the barrel. A mode to be attached to the part.

Further, when the writing tool with an erasing member is a knock type writing tool, the knock type writing tool can have the following aspects.
(1) A knock type that is equipped with a shaft tube, a crown, and a knock rod to which the crown is attached, and can switch between a written state and a non-written state by performing a knock operation that presses the crown forward. Aspect of writing instruments.
(2) A knock lock member arranged in front of the knock rod and capable of moving in the front-rear direction in the barrel by gravity, and a locking portion provided on the inner surface of the barrel and lockable with the knock lock member are further provided. A mode of a knock-type writing tool provided so that when the front end of the barrel is turned upward, the knock lock member moves rearward to lock with the locking portion, and the forward movement of the operation portion is prevented.

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

(A) is a front view of the writing instrument with an erasing member according to the first aspect of the present invention in a non-writing state, (b) is a vertical sectional view of the writing instrument with an erasing member shown in (a), and (c) is (b). It is a partially enlarged sectional view of the writing instrument with an erasing member shown in 1. (A) is a front view showing a state in which the crown is removed from the writing tool with an erasing member shown in FIG. 1 (a), and (b) is a front view showing a state in which the crown is removed from the writing tool with an erasing member shown in FIG. 1 (b). A vertical cross-sectional view showing the state of being removed, (c) is a partially enlarged cross-sectional view showing a state in which the crown is removed from the state shown in FIG. 1 (c). The structure of the crown of the first embodiment used for the writing tool with an erasing member of the first aspect of the present invention is shown, (a) is a perspective view of the crown as viewed from the knock rod insertion side, and (b) is. A perspective view of the crown as seen from the rear side, (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, and (f) is a view of the crown. It is sectional drawing in the axial direction. The structure of the knock rod of the first embodiment used for the writing tool with an erasing member according to the first aspect of the present invention is shown. FIG. A perspective view of the knock rod as viewed from the rear side, (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 a knock rod. It is sectional drawing in the axial direction. (A) is a perspective view showing the 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, and (b) is from the state shown in (a). It is a perspective view which shows the state which the crown is attached to a knock bar. A usable combination of the rear end portion of the knock rod of the first to third embodiments used for the writing tool with the erasing member of the first embodiment of the present invention and the crown of the first to third embodiments attached to the rear end portion. It is explanatory drawing which shows. The structure of the crown of the 4th embodiment used for the writing tool with an erasing member of the 1st embodiment of the present invention is shown. FIG. A perspective view of the crown as seen from the rear side, (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, and (f) is (d). It is sectional drawing in line AA of the crown shown in. (A) is a front view of the writing instrument with an erasing member according to the second aspect of the present invention in a writing state, (b) is a vertical sectional view of the writing instrument with an erasing member shown in (a), and (c) is shown in (b). It is a partially enlarged sectional view of the writing instrument with an erasing member shown by partially enlarging the back side. (A) is a front view showing a state in which the crown is removed when the writing instrument with an erasing member shown in FIG. 8 (a) is in a non-writing state, and (b) is a writing instrument with an erasing member shown in FIG. 8 (b). Is a vertical cross-sectional view showing a state in which the crown is removed when is in a 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. 8 (c). The structure of the crown of the fifth embodiment used for the writing tool with an erasing member of the second embodiment of the present invention is shown, (a) is a plan view of the crown, and (b) is the base side of the clip of the 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, and (f) is a view of the crown from the tip side of the clip. The viewed perspective view (g) is a cross-sectional view of the crown in the axial direction. (A) shows the structure of the knock rod on the erasing member side of the knock rod of the fourth embodiment used for the writing tool with the erasing member of the second embodiment of the present invention, and (a) shows the knock rod on the erasing member side. A perspective view seen from the tip side of the writing tool, (b) is a perspective view of the knock rod on the erasing member side as seen from the rear side, (c) is a front view of the knock rod on the erasing member side, and (d) is a knock rod on the erasing member side. 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, and (g) is an axial direction of the erasing member side knock rod. It is a cross-sectional view. (A) is a front view showing how the erasing member side knock rod shown in FIG. 11 is connected to the cam side knock rod in the knock rod of the fourth embodiment, (b) is a cross-sectional view of (a), (c). ) Is a front view in a state where the knock rod on the erasing member side is connected to the knock rod on the cam side. (A) is a perspective view showing an operation of attaching the crown shown in FIG. 10 to the knock rod from the rear end side of the writing instrument with an erasing member provided with the knock rod shown in FIG. 12 (c), (b) is (b). It is a perspective view which shows the state which the crown is attached to the knock rod from the state shown in a). (A) is a cross-sectional view of the crown of the sixth embodiment used for the writing tool with the erasing member of the second form, and (b) is a cross-sectional view of the crown of the seventh embodiment used for the writing tool with the erasing member of the second form. It is a figure. It is a front view of the crown of the 8th embodiment used for the writing tool with the erasing member of the 2nd form.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. A common reference code is attached to the corresponding components throughout the drawings.

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

Further, as shown in FIG. 1 (b), inside the front shaft 2, the rear shaft 3 and the inner cylinder 8 of the knock-type writing instrument 1, a refill 5 which is a cursive having a writing portion 5a at one end and a refill are refilled. There is a spring 6 that urges the rear 5 to the rear, and a knock mechanism 50 arranged at the rear end (rear end) of the rear shaft 3. The refill 5 contains, for example, a heat-discolorable ink that changes color due to frictional heat and becomes transparent when rubbed by an erasing member described later, or an ink that can be peeled off from the paper surface by the 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 projecting the writing portion 5a of the refill 5 is formed at the front end portion (front end portion). When the knock 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. It becomes a non-writing state.

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

The knock lock member 4 can move in the rear shaft 3 in the front-rear direction by gravity, and when the writing portion 5a faces downward and the knock lock member 4 moves in the rear shaft 3 toward the front shaft 2, the knock mechanism It enables a knock operation by the crown 10 without acting on the 50. On the other hand, when the erasing member 7 faces downward and the knock lock member 4 moves toward the rotor 60 in the rear shaft 3, it acts on the knock mechanism 50 to prevent the crown 10 from performing the knock operation. This is because when the crown 10 is removed and the handwriting on the paper surface is erased by using the erasing member 7, it is better to fix the erasing member 7 to the main body.

The present invention directly relates to 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 due to the movement of the knock lock member 4. Since it has nothing to do with, further explanation will be omitted.

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 knock rod 30, and the erasing member 7 is provided in the erasing member mounting hole 37 by fitting, press-fitting, or gluing. Further, the erasing member 7 can be provided on the knock rod 30 by two-color molding or the like. A crown 10 that covers the erasing member 7 is detachably attached to the rear end of the knock rod 30.

FIG. 2A shows a state in which the crown 10 is removed from the knock-type writing tool 1 shown in FIG. 1A, and FIG. 2B shows the knock-type writing tool shown in FIG. 2A. The vertical cross section of 1 is shown. 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 and the structure of the knock rod 30 of the crown 10 used for the knock-type writing tool 1 of the first embodiment will be described with reference to FIGS. 3 to 5.

FIG. 3A shows the crown 10 of the first embodiment viewed from the insertion side (front) of the knock rod, and FIG. 3B shows the crown 10 shown in FIG. 3A on the opposite side. It is seen from. Further, FIG. 3 (c) shows the crown 10 shown in FIG. 3 (a) sideways and viewed from the front, and FIG. 3 (d) shows the left side of the crown 10 shown in FIG. 3 (d). It is a top view, and FIG. 3 (e) is a right side view of the crown 10. Further, FIG. 3 (f) shows a cross section of the crown 10 in the axial direction.

The crown 10 of the first embodiment is provided with a bottom surface 15 at one end of a cylindrical cylinder, and protrusions 11 are provided at predetermined equal intervals on the inner peripheral surface on the side close to the opening 16. There is. Further, in the first embodiment, the number of protrusions 11 is 4, but the number of protrusions 11 is not particularly limited. However, when the crown 10 is attached to the knock rod, it is desirable that the protrusions 11 are provided at equal intervals so that the crown 10 can be attached with a uniform pushing force. As can be seen from FIG. 3D, the height of the protrusion 11 from the inner peripheral surface of the crown 10 is very small. Further, the outer shape of the protrusion 11 is oval or elliptical. The top surface of the protrusion 11 of this embodiment is flat, but it may be raised in a dome shape.

On the other hand, on the outer peripheral surface of the crown 10, a plurality of rib-shaped protrusions 14 parallel to the axis of the crown 10 are provided. The protruding portions 14 are projected on the outer peripheral surface of the crown 10 at equal intervals radially around the axis of the crown 10, and the protruding portions 14 are on the side where the bottom surface 15 of the crown 10 is located, and the tapered portion 14a. Therefore, the height of the crown 10 from the outer peripheral surface is gradually lowered. The outer peripheral surface of the crown 10 between the protrusions 14 is a groove 13 connecting the crown 10 in the front-rear direction, which serves as an airway when the crown 10 is accidentally swallowed. No ventilation hole is provided on the bottom surface 15 of the crown of the first embodiment.

FIG. 4 (a) 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 tool 1 shown in FIGS. 1 (b) and 2 (b). .. Further, FIG. 4 (b) is a view of the knock rod 30 shown in FIG. 4 (a) from the opposite side, and FIG. 4 (c) is a front view of the knock rod 30 shown in FIG. 4 (a) sideways. It is seen from. 4 (d) is a view of the knock rod 30 shown in FIG. 4 (c) from the left side, and FIG. 4 (e) is a view 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 has a small diameter portion 34 which is an attachment portion of the crown 10 adjacent to the large diameter portion 33. The large diameter portion 33 has a protrusion on the outer peripheral surface on the rotor side (front), a cam is formed at the front end portion, and a communication hole 39 communicating with the erasing member mounting hole 37 described later is provided inside. Since the protrusions and cams are not directly related to the present invention, their description will be omitted here.

The small diameter portion 34 has a slightly smaller diameter than the large diameter portion 33. As shown in FIG. 4 (f), an erasing member mounting hole 37 for holding the erasing member 7 is provided inside a part of the large diameter portion 33 and inside the small diameter portion 34, and the erasing member mounting hole 37 is provided. An 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 component, 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 with reference to FIG.

Further, a ridge 32 is provided in an annular shape on the outer peripheral surface of the small diameter portion 34. The height of the small diameter portion 34 of the ridge 32 from the outer peripheral surface is very small, and the distance between the ridge 32 and the large diameter portion 33 is the opening 16 of the crown 10 shown in FIG. 3 (f). Is equal to the distance from the protrusion 11 to the end of the protrusion 11 on the bottom surface 15 side. Therefore, when the crown 10 is attached to the knock rod 30, the protrusion 11 gets over the ridge 32, and as shown in FIG. 1 (c), the protrusion 11 is locked by the ridge 32.

FIG. 5A 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 tool 1 provided with the knock rod 30 shown in FIG. The knock rod 30 is attached to the knock type writing tool 1 in a state where the tip end portion of the small diameter portion 34 and the erasing member 7 protrude from the opening 8a at the rear end portion of the inner cylinder 8 of the knock type writing tool 1. When the crown 10 is attached to the rear end side of the knock-type writing tool 1, the crown 10 is put on the erasing member 7 and inserted into the inner cylinder 8 through the opening 8a. Then, the protrusion 11 provided on the inner peripheral surface of the crown 10 gets over the ridge 32 of the small diameter portion 34 and is attached to the knock rod 30.

FIG. 5B shows a state in which the crown 10 is inserted into the inner cylinder 8 of the knock-type writing tool 1 and attached to the knock rod 30 from the state shown in FIG. 5A. In this state, as shown in FIG. 1 (c), the protrusion 11 provided on the crown 10 gets over the ridge 32 and forms on 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 ridge 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 tool 1. The groove 13 and the protrusion 14 on the crown 10 make it easier to grip the crown 10 and make it easier to remove the crown 10 from the knock rod 30. The number of protrusions 14 and the depth and shape of the grooves 13 are not particularly limited, and it is sufficient that the crown 10 inserted into 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, satin-finished, or the like.

The crown 10 of the first embodiment is provided with a protrusion 11 on the inner peripheral surface thereof, and the knock rod 30 of the first embodiment is provided with an 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 upper right figure of FIG. 6, and the knock rod 30 of the first embodiment is shown in the upper left figure of FIG. Only shown.

On the other hand, regarding the crown, the crown 10A of the second embodiment shown in the cross section on the right side in the center of FIG. 6 and the crown 10B of the third embodiment shown in the cross section on the lower right side of FIG. It is possible. In the crown 10A of the second embodiment, the ridges 12 are provided in an annular shape on the inner peripheral surface instead of the protrusions. 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 protrusion 11 in the crown 10 of the first embodiment, and is a position to receive the ridge 32 when the knock rod 30 of the first embodiment is connected.

Regarding the knock rods, the knock rod 30A of the second embodiment showing the rear end portion in the left figure in the center of FIG. 6, and the third embodiment showing the rear end portion in the lower left figure of FIG. Knock rod 30B is possible. The knock rod 30A of the second embodiment is provided with protrusions 31 provided at predetermined intervals instead of ridges on the outer peripheral surface of the small diameter portion 34. The knock rod 30B of the third embodiment is provided with an annular groove 38 on the outer peripheral surface of the small diameter portion 34 for receiving the protrusion 11 of the crown 10 of the first embodiment or the ridge 12 of the crown 10A of the second embodiment. be. Therefore, the position of the annular groove 38 is closer to the large diameter portion 33 than the position of the ridge 32 from the large diameter portion 33 in the knock rod 30 of the first embodiment.

In FIG. 6, the crown 10 of the first embodiment, the crown 10A of the second embodiment and the crown 10B of the third embodiment, the knock rod 30 of the first embodiment, and the knock rod 30A of the second embodiment are shown. And possible combinations of the knock rods 30B of the third embodiment are indicated by arrows. The crown 10 of the first embodiment can be combined with the knock rods 30 and 30B of the first and third embodiments. Further, 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. Further, the crown 10B of the third embodiment can be combined with the knock rods 30 and 30A of the first and second embodiments.

7 (a) to 7 (f) show the structure of the crown 10C of the fourth embodiment used for the knock-type writing tool 1 of the first embodiment of the present invention, and FIGS. 3 (a) to 3 (f) show the structure of the crown 10C. A drawing in the same state as the crown 10 of the first embodiment shown in the above is shown. The difference between the crown 10C of the fourth embodiment and the crown 10 of the first embodiment is that the bottom surface 15 is provided with a ventilation hole 17 for ensuring the amount of ventilation. In the crown 10C of the fourth embodiment, the ventilation holes 17 are long arcuate holes and are provided with two, but the shape and number of the ventilation holes 17 are not particularly limited, and the ventilation amount may be increased.

FIG. 8A is a front view of the knock-type writing instrument 1A of the second aspect of the present invention to which the crown 20 of the fifth embodiment is attached and is in a writing state, and FIG. 8B is shown. A vertical cross section of the knock-type writing instrument 1A shown in FIG. 8A is shown. Further, FIG. 9A is a front view of the knock-type writing instrument 1A shown in FIG. 8A with the crown 20 removed in a non-writing state, and FIG. 9B is FIG. 9; The vertical cross section of the knock type writing instrument 1A shown in (a) is shown. Further, FIG. 8 (c) shows a partially enlarged rear end portion of FIG. 8 (b), and FIG. 9 (c) shows the rear end portion of the knock-type writing tool 1A shown in FIG. 9 (b). Partially enlarged and shown.

The structure of the main body of the knock-type writing tool 1A of the second form is the same as that of the knock-type writing tool 1 of the first form, and the main body is provided with a front shaft 2, a rear shaft 3, and an inner cylinder 8. Similar to the knock-type writing tool 1, the knock-type writing tool 1A has a refill 5, a spring 6, and a knock mechanism 50 inside the front shaft 2, the rear shaft 3, and the inner cylinder 8. The knock mechanism 50 has a knock rod 40 and a rotor 60 provided between the knock rod 40 and the refill 5. The rotor 60 is the same as the knock type writing tool 1, but the structure of the knock rod 40 is knock. It is different from the structure of the knock bar 30 of the formula writing tool 1. The structure of the knock rod 40 will be described later.

Similar to the knock-type writing instrument 1, the front side of the front shaft 2 is formed in a tapered shape, and the through hole 2a for projecting the writing portion 5a of the refill 5 is formed at the front end (front end). be. Even in the knock-type writing tool 1A of the second form, when the knocking operation of pressing 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. 8 (FIG. 8). a), (b)) and the non-writing state (FIGS. 9 (a) and 9 (b)) in which the writing portion 5a is housed inside the through hole 2a. The function of the knock lock member 4 arranged in front of the knock rod 40 is the same as that of the knock lock member 4 in the knock type writing tool 1 of the first embodiment, and is not directly related to the present invention. The explanation of is omitted.

The second form of the knock type writing tool 1A is different from the first form of the knock type writing tool 1 in that the clip 9 is provided on the outer peripheral surface 21 of the crown 20 and the knock bar 40 is the cam side knock bar 41. It is a point divided into a knock rod 42 on the erasing member side. The knock rod 40 is usually integrated, but the erasing member side knock rod 42 can be separated from the cam side knock rod 41. As shown in FIGS. 8 (c) and 9 (c), the cam-side knock rod 41 is coupled to the rotor 60, and the erasing member 7 is provided in the erasing member mounting hole 47 provided in the erasing member-side knock rod 42. Is attached.

The crown 20 of the fifth embodiment is attached to the knock rod 42 on the erasing member side. 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 portion between the cam-side knock rod 41 and the erasing member-side knock rod 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 rod 40 will be described with reference to FIGS. 10 to 13.

10 (a) to 10 (f) are views of the crown 20 of the fifth embodiment used in the knock-type writing tool 1A of the second embodiment of the present invention from various directions, and are viewed from various directions. ) Indicates a cross section of the crown 20 in the axial direction. The crown 20 covers the erasing member attached to the end of the knock rod to protect it from dust, hand stains, and the like, and can be removed from the knock rod when the erasing member is used. A clip 9 is attached to the outer peripheral surface of the crown 20, but there are no protrusions 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's getting bigger.

11 (a) to 11 (e) are views of the knock rod 42 on the erasing member side of the knock rod 40 of the fourth embodiment used in the knock type writing tool 1A of the second embodiment of the present invention from various directions. 11 (g) shows a cross section of the knock rod 42 on the erasing member side in the axial direction. The erasing member side knock rod 42 has a coupling portion 43 that is coupled to the cam side knock rod 41, an erasing member holding portion 44 that holds 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 ridges 46 are provided on the outer peripheral surface of the coupling portion 43, and an annular engaging ridge 48 is also provided on the outer peripheral surface of the erasing member holding portion 44. The engaging ridge 48 has a height that slightly rises from the outer peripheral surface.

In the fourth embodiment, the erasing member side knock rod 42 is provided with an annular engaging ridge 48, but the engaging ridge 48 is an annular engaging protrusion 48A as shown in FIG. 11 (f). , The erasing member side knock 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 with 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 knock rod 41 and the erasing member side knock rod 42 is shown. The cam-side knock rod 41 is provided with a communication hole 39 for receiving the connecting portion 43 of the erasing member-side knock rod 42, and the inner peripheral surface of the communication hole 39 is provided with an outer periphery of the connecting portion 43 of the erasing member-side knock rod 42. Two coupling ridges 49 are provided to lock the two coupling ridges 46 provided on the surface. When the erasing member side knock rod 42 is coupled to the cam side knock rod 41, the knock rod 40 as shown in FIG. 12 (c) is formed.

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 tool 1A provided with the knock rod 40 shown in FIG. 12 (c). be. The knock rod 40 is a knock type in a state where the cam side knock rod 41 and the erasing member side knock rod 42 provided with the erasing member 7 protrude from the opening 8a at the rear end of the inner cylinder 8 of the knock type writing tool 1A. It is attached to the writing tool 1A. When the crown 20 is attached to the rear end side of the knock-type writing tool 1A, the crown 20 is put on the erasing member 7 and attached to the erasing member side knock rod 42. As a result, the tapered inner peripheral surface of the crown 20 is frictionally coupled to the engaging ridge 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 a state in which the crown 20 is attached to the knock rod 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 engaging ridge 48 formed on the outer peripheral surface of the erasing member holding portion 44 of the erasing member side knock rod 42. It is engaged with the knock rod 42 on the erasing member side. Since the crown 20 is provided with the clip 9, the crown 20 can be easily attached to and detached from the knock rod 42 on the erasing member side by using the clip 9. Further, the erasing member 7 can be used by removing the erasing member side knock rod 42 from the cam side knock rod 41.

FIG. 14A shows a cross section of the crown 20A of the sixth embodiment used for the knock type writing tool 1A of the second form. The crown 20 of the fifth embodiment was not provided with a protrusion on the inner peripheral surface of the crown 20, but the inner peripheral surface 22 of the crown 20A of the sixth embodiment was provided in the vicinity of the opening 27. A ridge 23 that slightly protrudes from the inner peripheral surface 22 is provided. When the crown 20A of the sixth embodiment is attached to the knock rod 42 on the erasing member side, the ridge 23 is formed between the engaging ridge 48 and the flange portion 45 of the erasing member holding portion 44 shown in FIG. 9 (c). Since it fits into the portion, the engagement strength between the crown 20A and the knock rod 42 on the erasing member side can be increased. However, since the engagement between the ridge 23 and the engaging ridge 48 of the erasing member holding portion 44 is not so strong, if the clip 9 provided on the crown 20A is used, the erasing member side knock rod 42 The crown 20A can be easily attached to and detached from the crown 20A.

FIG. 14B shows a cross section of the crown 20B of the seventh embodiment used for the knock type writing tool 1A of the second form. The crown 20 of the fifth embodiment was not provided with a protrusion on the inner peripheral surface of the crown 20, but the inner peripheral surface 22 of the crown 20B of the seventh embodiment was provided in the vicinity of the opening 27. A protrusion 24 that slightly protrudes from the inner peripheral surface 22 is provided. When the crown 20B of the seventh embodiment is attached to the knock rod 42 on the erasing member side, the protrusion 24 is a portion between the engaging ridge 48 and the flange portion 45 of the erasing member holding portion 44 shown in FIG. 9 (c). Therefore, the engagement strength between the crown 20B and the knock rod 42 on the erasing member side can be increased. However, since the engagement between the protrusion 24 and the engaging ridge 48 of the erasing member holding portion 44 is not so strong, if the clip 9 provided on the crown 20B is used, the knock rod 42 on the erasing member side can be used. The crown 20B can be easily attached and detached.

FIG. 15 shows the crown 20C of the eighth embodiment used for the knock type writing tool 1A of the second form. In the crown 20C of the eighth embodiment, the crowns 10, 10A, 10B and 10C of the first to fourth embodiments are provided in the portion of the outer peripheral surface 21 of the crown 20 of the fifth embodiment where the clip 9 is not provided. Similarly, a plurality of rib-shaped protrusions 25 parallel to the axis of the crown 20C are provided. The protruding portion 25 may be provided so as to project radially at equal intervals centered on the axis of the crown 20C at a portion of the outer peripheral surface of the crown 20C where the clip 9 is not provided. A tapered portion 25a is provided on the side of the protruding portion 25 where the bottom surface 26 of the crown 20C is located. Since the protruding portion 25 is provided on the outer peripheral surface 21 of the crown 20C, the crown 20C can be easily gripped, and the crown 20C and the erasing member side knock rod 42 can be more easily attached and detached. The shape and number of the protrusions 25 are not particularly limited, and it is sufficient if the crown 20C can be easily gripped. Therefore, for example, when the crown 20C is made of metal, the outer surface of the crown 20C may be knurled.

As described above, in the knock-type writing tool of the present invention, the erasing member 7 is covered with the crowns 10, 10A, 10B, 10C, 20, 20A, 20B or 20C except when in use. It is possible to prevent the member 7 from becoming dirty. Further, the crown 10, 10A, 10B, 10C, 20, 20A, 20B or 20C can be easily attached to the knock rod, and the crown attached to the knock rod can be easily removed from the knock rod. Can be done.

In the above-described embodiment, the refill, which is a cursive, contains a heat-discolorable ink. In this case, the knock-type writing tool is a heat-discolorable writing tool, 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 generated frictional heat causes the handwriting of the knock-type writing tool. Can be thermally discolored. As the cursive, a ballpoint pen containing a heat-discoloring ink, a mechanical pencil containing a heat-changing core, a pencil holder, or the like can be considered. In addition, a knock-type writing tool containing an eraser-erasing ink that can be erased with an eraser in the refill is possible. In this case, as the erasing member, a member that wears when the ink is stripped from the paper surface is selected as in the eraser.

Here, the heat-discolorable ink maintains a predetermined color (first color) at room temperature (for example, 25 ° C.), and changes to another color (second color) when the temperature is raised to a predetermined temperature (for example, 65 ° C.). The ink has the 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 heat-changing ink, the second color is made colorless, and the temperature of the drawn line written in the first color (for example, red) is raised to make it colorless, which is referred to as "erasing" here. Therefore, the drawn line is rubbed against the written surface or the like on which the drawn line is written by a friction body as an erasing member to generate frictional heat, whereby the drawn line is changed to colorless, that is, erased. As a matter of course, the second color may be colored other than colorless.

Further, in a writing tool using a refill containing an eraser erasable ink that can be erased with an eraser, the eraser erasable ink contains water and non-thermoplastic colored resin particles having an average particle diameter of 1.0 to 15 μm in the entire ink composition. 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 water-based ink of the present invention are composed 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 a pigment is dispersed, colored resin particles in which the surface of the resin particles is coated with a colorant made of a pigment, colored resin particles in which a colorant made of a dye is dyed on the resin particles, etc. Can be mentioned.

In this embodiment, if the colored resin particles are non-thermoplastic and satisfy the above average particle diameter, the structure [with hollow structure, without hollow structure (fine solid)] and shape (spherical, polygonal, flat). , Fibrous), etc. are not particularly limited, but preferably, the glass transition temperature reaches the thermal decomposition temperature at 150 ° C. or higher from the viewpoint of exhibiting excellent eraser erasability, writability, and stability over time as an ink. Spherical colored resin fine particles that are close to each other and have an intramolecular cross-linking such that the melt flow index value is less than 0.1, do not have adhesiveness, and have an average particle size of 1.0 to 15 μm. Desirable to use.

As materials for forming the erasing member, there are two types of rubber materials such as silicone rubber, nitrile rubber, ethylene propylene rubber, ethylene propylene diene rubber and the like, and thermoplastic elastomers such as styrene elastomers, olefin elastomers and polyester elastomers. Examples thereof include the above-mentioned mixture of rubber elastic material, mixture of rubber elastic material and synthetic resin, and commercially available eraser.

When the erasing member is used as a heat-discoloring writing tool, it is particularly formed of a mixture of polypropylene resin and styrene-based thermoplastic elastomer, or a mixture of polypropylene resin and polypropylene-based thermoplastic elastomer, and the blending ratio thereof is 1: 1 in weight ratio, respectively. It is made of a material having a durometer hardness A of 70 ° to 100 °, which is ~ 1: 4, does not contain an abrasive, a plasticizer, or a filler, and has a durometer hardness A specified in JIS K6251, and is a pencil specified in JIS S 6050-2002. It is formed of a low-wear elastic material containing no plasticizer and having an erasing ability (erasing rate) of 70% or less. As a result, the erasing member is effective because it is less likely to generate erasing residue when scratched and has excellent thermal discoloration.

In addition, the term "erasing" in the present invention means that the drawn lines, characters, etc. written are adsorbed or scraped off by an erasing portion such as an eraser, in addition to the case where the heat-changing ink is used. Further, the pressure-sensitive stylus, the shaft tube, or the like may be provided with electrical conductivity, and an erasing member and a crown may be provided at the rear end of the capacitive stylus. Therefore, the present invention can be applied to any stationery equipped with an erasing member capable of erasing the drawn lines (handwriting) written by the writing tool.

1,1A Writing tool with erasing member (knock type writing tool)
7 Erasing member 8 Inner cylinder 9 Clip 10, 10A, 10B, 10C, 20, 20A, 20B, 20C Crown crown 11, 24, 31 Protrusions 12, 23, 32 Protrusions 13 Grooves 14, 25 Protrusions 30, 30A, 30B , 40 Knock rod 41 Cam side knock rod 42 Erasing member side knock rod

Claims (1)

An erasing member capable of erasing the handwriting written on the paper is provided at the rear end of the barrel, and a crown that covers and protects the erasing member is detachably attached to the rear end of the barrel. By knocking, the pen tip of the refill appears and disappears from the tip of the shaft cylinder, and inside the shaft cylinder, there is a refill for writing containing heat-discoloring ink, and the handwriting written by the refill is In a knock-type writing tool with an erasing member, which can be thermally discolored by the frictional heat generated when the erasing member is rubbed.
The erasing member is provided in the barrel of the writing instrument and is connected to a knock rod located on the rearmost end side of the knock mechanism that causes the pen tip of the refill to appear and disappear by knocking the crown. death,
A ridge is provided in an annular shape on the outer peripheral surface of the knock rod, a protrusion is provided on the inner surface of the crown, and when the crown is attached to the knock rod, the protrusion gets over the ridge. Locked up
Vents are provided on the bottom surface of the crown.
A plurality of rib-shaped protrusions are provided on the outer peripheral surface of the crown.
The rib-shaped protrusion is parallel to the axial direction of the crown .
A clip is provided on the outer peripheral surface of the crown, and a rib-shaped protrusion is formed in a portion other than the clip.
A writing tool with an erasing member, characterized in that a tapered portion is formed on the side where the bottom surface of the crown is located so that the height from the outer peripheral surface of the crown gradually decreases .

Images