JP6235809B2 - Thermochromic writing instrument - Google Patents

Description

The present invention is provided with a friction part made of a low-abrasion elastic material capable of thermally discoloring the handwriting by frictional heat generated by rubbing the handwriting of the thermochromic ink on the cylindrical main body, and inside. The present invention relates to a thermochromic writing instrument containing a thermochromic ink.

Conventionally, in a thermochromic writing instrument, a configuration in which a friction body is provided at the rear end of the shaft barrel or the top of the cap has been disclosed. (For example, patent document 1).

JP 2007-223302 A

When the thermochromic writing instrument of Patent Document 1 is stored and stored in a pencil case, a pen stand, or a pocket of clothes when not in use, the friction part is always exposed to the outside. Contact with other articles (for example, the outer surface of other writing instruments, the inner surface of a pen case, the bottom surface of a pen stand, or the inner surface of a pocket of clothes), dust and dirt adhere to the surface of the friction part, and the surface of the friction part becomes dirty. There is a problem that the paper surface becomes dirty when the surface of the paper (writing surface) is rubbed with the dirty friction portion.

The present invention solves the above-mentioned conventional problems, and an object of the present invention is to provide a thermochromic writing instrument that can prevent the friction portion from becoming dirty when not in use.
In the present invention, “upper” refers to the friction part side of the main body, and “lower” refers to the opposite side.

1st invention of this application is equipped with the friction part 3 which consists of a low-abrasion elastic material which can rub the handwriting of a thermochromic ink in the cylindrical main body 2, and can thermally discolor the handwriting by the frictional heat which arises in that case And a thermochromic writing instrument containing thermochromic ink therein, wherein the frictional portion 3 is provided on the outer side wall of the cylindrical main body 2, and the outer side wall of the cylindrical main body 2 is provided in the axial direction. A movable protection member 4 is provided, and when the friction part 3 is not used, the protection member 4 covers a radial outer surface of the friction part 3, and when the friction part 3 is used, the protection member 4 is attached to the friction part. It is a requirement that it is disposed at a position away from 3 downward and the radially outer surface of the friction part 3 is exposed to the outside.

In the thermochromic writing instrument 1 of the first invention, the friction portion 3 is provided on the outer surface of the side wall of the cylindrical main body 2, and the protective member 4 movable in the axial direction is provided on the outer surface of the side wall of the cylindrical main body 2. Provided, when the friction part 3 is not used, the protective member 4 covers the outer surface in the radial direction of the friction part 3, and when the friction part 3 is used, the protective member 4 is positioned away from the friction part 3 downward. The outer surface in the radial direction of the friction portion 3 is exposed to the outside so that the protective member 4 can be stored even when stored in a pen case, a pen stand, or a pocket of clothes when not in use. The friction part 3 is prevented from coming into contact with other articles (for example, the outer surface of other writing instruments, the inner surface of a pen case, the bottom surface of a pen stand, or the inner surface of a pocket of clothes), and the friction part 3 becomes dirty when not in use. Can be prevented. In the present invention, the cylindrical main body 2 is, for example, a shaft cylinder provided with a pen tip at one end and containing a thermochromic ink inside, or a cap that is detachably attached to the pen tip side of the shaft cylinder. Etc.

According to a second invention of the present application, in the thermochromic writing instrument 1 of the first invention, an attachment convex portion 21 is provided on the outer surface of the side wall of the main body 2, and the protective member 4 is axially provided on the attachment convex portion 21. A mounting portion 42 that is movably mounted, and a covering portion 41 that covers the radial outer surface of the mounting convex portion 21 when the friction portion 3 is used and covers the radial outer surface of the friction portion 3 when the friction portion 3 is not used. Is a requirement.

The thermochromic writing instrument 1 according to the second aspect of the present invention is provided with the mounting convex portion 21 on the outer surface of the side wall of the main body 2, and the mounting portion 42 where the protective member 4 is mounted on the mounting convex portion 21 so as to be movable in the axial direction. And a covering portion 41 that covers the radial outer surface of the mounting convex portion 21 when the friction portion 3 is used and covers the radial outer surface of the friction portion 3 when the friction portion 3 is not used. While being able to attach appropriately, the friction part 3 can be appropriately coat | covered with the protection member 4 at the time of non-use of a friction part.

According to a third invention of the present application, in the thermochromic writing instrument 1 of the second invention, the mounting convex portion 21 is provided at a position below the friction portion 3 on the same axis passing through the friction portion 3. Is a requirement.

In the thermochromic writing instrument 1 according to the third aspect of the invention, the mounting convex portion 21 is provided at a position below the friction portion 3 on the same axis passing through the friction portion 3 so as to be protected when the friction portion is not used. The friction part 3 can be appropriately covered with the member 4.

According to a fourth invention of the present application, in the thermochromic writing instrument 1 according to the third invention, the radial height of the mounting convex portion 21 is substantially equal to the radial height of the friction portion 3 or The requirement is that the frictional part 3 is set to be higher than the radial height.

In the thermochromic writing instrument 1 according to the fourth aspect of the present invention, the radial height of the mounting convex portion 21 is substantially equal to the radial height of the friction portion 3 or the radial height of the friction portion 3. By setting higher than this, when the protective member 4 is moved upward from the exposed state of the friction part, the protective member 4 can be properly and reliably covered with the protective member 4 without being caught by the friction part 3. .

According to a fifth invention of the present application, in the thermochromic writing instrument 1 of the third or fourth invention, the circumferential width dimension of the mounting convex portion 21 is substantially equal to the circumferential width dimension of the friction portion 3. Alternatively, it is necessary to set the friction part 3 to be larger than the width dimension in the circumferential direction.

In the thermochromic writing instrument 1 according to the fifth aspect of the invention, the circumferential width dimension of the mounting projection 21 is substantially equal to the circumferential width dimension of the friction part 3 or the circumferential direction of the friction part 3. By setting it larger than the width dimension, when the protective member 4 is moved upward from the exposed state of the friction part, the protective member 4 does not catch the friction part 3 and the friction member 3 is properly and reliably secured by the protective member 4. Can be coated.

According to a sixth invention of the present application, in the thermochromic writing instrument 1 according to the first to fifth inventions, a frictional portion covering state is temporarily held between the protective member 4 and the side wall outer surface of the main body 2. And a second locking portion 6 that temporarily holds the exposed state of the friction portion between the protective member 4 and the outer surface of the side wall of the main body 2 is provided. To do.

The thermochromic writing instrument 1 of the sixth aspect of the present invention is provided with a first locking portion 5 that temporarily holds the friction portion covering state between the protective member 4 and the side wall outer surface of the main body 2, and By providing the second locking part 6 that temporarily holds the exposed state of the friction part between the protective member 4 and the outer surface of the side wall of the main body 2, the friction part 3 stabilized by the first locking part 5 is provided. The covering state can be maintained, and a stable friction operation can be performed by the second locking portion 6.

In the present invention, the elastic material constituting the friction part 3 is preferably a synthetic resin (rubber or elastomer) having elasticity. For example, silicone resin, SBS resin (styrene-butadiene-styrene copolymer), SEBS resin (styrene) -Ethylene-butylene-styrene copolymer), fluorine resin, chloroprene resin, nitrile resin, polyester resin, ethylene propylene diene rubber (EPDM) and the like. The synthetic resin having elasticity constituting the friction portion 3 is not a highly wearable elastic material (for example, an eraser) but a low wear elastic material in which wear debris (erasure debris) hardly occurs during friction. In the present invention, the protective member 4 is preferably composed of a synthetic resin (for example, polycarbonate, polyethylene, polypropylene, polyacetal, ABS resin, etc.) or a metal. The main body 2 is preferably composed of a synthetic resin (for example, polycarbonate, polyethylene, polypropylene, polyacetal, ABS resin, etc.) or a metal.

The thermochromic writing instrument of the present invention can prevent the friction part from becoming dirty when not in use.

It is a principal part side view at the time of the friction part use of the 1st Embodiment of this invention. It is a principal part front view of FIG. It is an AA line expanded sectional view of FIG. FIG. 2 is an enlarged explanatory view of a mounting portion in FIG. 1. It is a principal part side view at the time of the friction part non-use of FIG. It is a principal part front view of FIG. It is a principal part side view at the time of the friction part use of the 2nd Embodiment of this invention. It is a principal part front view of FIG. FIG. 8 is an enlarged sectional view taken along line B-B in FIG. 7. FIG. 8 is an enlarged explanatory view of the attachment portion of FIG. 7. It is a principal part side view at the time of the friction part non-use of FIG. It is a principal part front view of FIG.

<First Embodiment>
The thermochromic writing instrument of the 1st Embodiment of this invention of FIG. 1 thru | or FIG. 6 is shown.
The thermochromic writing instrument 1 of the present embodiment includes a cylindrical main body 2, a friction part 3, and a protection member 4.

Main body The main body 2 is a cylindrical body and is made of synthetic resin or metal. The main body 2 is, for example, a shaft cylinder that includes a pen tip at one end in which a thermochromic ink is accommodated and the thermochromic ink can be discharged. Specifically, the cursive body is accommodated in the shaft cylinder so as to be movable in the axial direction, the cursive body includes a pen tip in which the thermochromic ink is accommodated and the thermochromic ink can be discharged, and the shaft The pen tip is projected and retracted from the lower end portion of the shaft tube by pressing the operation portion 22 provided at the upper end portion of the tube forward. The main body 2 is configured by a plurality of members (for example, a first cylinder having a mounting projection 21 and two members of a second cylinder connected to the lower side of the first cylinder). It may be configured by one member.

Friction part Friction part 3 is provided at the end of the main body 2 on the side opposite to the pen tip (outer surface of the upper end side wall of main body 2). The friction part 3 is formed in a substantially rectangular parallelepiped shape. The friction part 3 is made of a low-abrasion elastic material (for example, silicone resin, SBS resin, SEBS resin), and is fitted, press-fitted, engaged, screwed, adhered, etc. to the outer surface of the upper end side wall of the main body 2. It is fixed by the means. Further, the friction portion 3 is in contact with the upper end portion of the mounting convex portion 21 or fixed by the means, and can reliably prevent the rearward movement of the friction portion 3 during friction.

Attachment convex portion A substantially rectangular parallelepiped attachment convex portion 21 is formed on the outer surface of the side wall of the main body 2. The mounting convex portion 21 is positioned below the friction portion 3 on the same axis passing through the friction portion 3. Slide grooves 21 a are formed on the outer surfaces of both side walls of the mounting convex portion 21. At both ends of the slide groove 21a, climbing protrusions 51 and 61 are formed with which the engaging protrusions 42a can be temporarily engaged. The height in the radial direction of the mounting convex portion 21 is set to be substantially equal to the height in the radial direction of the friction portion 3 or higher than the height in the radial direction of the friction portion 3. The circumferential width dimension of the mounting projection 21 is set to be approximately equal to the circumferential width dimension of the friction part 3 or larger than the circumferential width dimension of the friction part 3.

-Protective member The said protective member 4 is attached to the attachment convex part 21 of the main body 2 so that sliding is possible to an axial direction. The protective member 4 includes a covering portion 41, an attachment portion 42, and a clip portion 43 (a clip portion that can be held in a pocket of clothes). The covering portion 41 and the mounting portion 42 have a U-shaped cross section, and a pair of mounting portions 42 are integrally connected from both sides of the covering portion 41. Engaging protrusions 42 a are formed on both inner surfaces of the mounting portion 42. The engaging protrusion 42a is slidably provided in the slide groove 21a. The engagement protrusion 42a can be temporarily locked with the over-ride protrusions 51 and 61 at both ends of the slide groove 21a. The covering portion 41 and the attachment portion 42 serve as a base portion of the clip portion 43.

In the present embodiment, the engagement protrusion 42a can be temporarily locked with the overpass protrusions 51 and 61 at both ends of the slide groove 21a. That is, the climbing projection 51 and the engagement projection 42a at the upper end of the slide groove 21a constitute the first locking portion 5, and the climbing projection 51 and the engagement projection 42a at the upper end of the slide groove 21a are temporarily When locked, the friction part covering state is maintained. On the other hand, the climbing projection 61 and the engaging projection 42a at the lower end of the slide groove 21a constitute the second locking portion 6, and the climbing projection 61 and the engaging projection 42a at the lower end of the slide groove 21a temporarily. When locked, the frictional part exposed state is maintained.

In the thermochromic writing instrument 1 of the present embodiment, the friction part 3 is provided on the outer surface of the side wall of the cylindrical body 2, and the protective member 4 that is movable in the axial direction is provided on the outer surface of the side wall of the cylindrical body 2. When the friction part 3 is not used, the protection member 4 covers the outer surface in the radial direction of the friction part 3, and when the friction part 3 is used, the protection member 4 is moved away from the friction part 3. By arranging and exposing the outer surface in the radial direction of the friction portion 3 to the outside, the protective member 4 can be used for friction even when stored in a pen case, a pen stand, or a pocket of clothes when not in use. It is avoided that the portion 3 comes into contact with other articles (for example, the outer surface of other writing instruments, the inner surface of a pen case, the bottom surface of a pen stand, or the inner surface of a pocket of clothes), and the friction portion 3 is stained when not in use. Can be prevented.

The thermochromic writing instrument 1 according to the present embodiment is provided with a mounting convex portion 21 on the outer surface of the side wall of the main body 2, and the protective member 4 is mounted on the mounting convex portion 21 so as to be movable in the axial direction. The protective member 4 is attached to the main body 2 by including a covering portion 41 that covers the radial outer surface of the mounting convex portion 21 when the friction portion 3 is used and covers the radial outer surface of the friction portion 3 when the friction portion 3 is not used. While being able to attach appropriately, the friction part 3 can be appropriately coat | covered with the protection member 4 at the time of non-use of a friction part.

In the thermochromic writing instrument 1 of the present embodiment, the mounting convex portion 21 is provided at a position below the friction portion 3 on the same axis passing through the friction portion 3, so that a protective member is used when the friction portion is not used. 4 can coat the friction part 3 appropriately.

In the thermochromic writing instrument 1 according to the present embodiment, the height in the radial direction of the mounting convex portion 21 is substantially equal to the height in the radial direction of the friction portion 3 or the radial height of the friction portion 3. By setting it high, the friction member 3 can be properly and reliably covered with the protection member 4 without being caught by the friction member 3 when the protection member 4 is moved upward from the exposed state of the friction portion.

In the thermochromic writing instrument 1 of the present embodiment, the circumferential width dimension of the mounting projection 21 is substantially equal to the circumferential width dimension of the friction part 3 or the circumferential width of the friction part 3. By setting the size larger than the dimension, when the protective member 4 is moved upward from the exposed state of the friction portion, the protective member 4 is properly and reliably covered with the protective member 4 without being caught by the friction portion 3. it can.

The thermochromic writing instrument 1 of the present embodiment is provided with a first locking portion 5 that temporarily holds the friction portion covering state between the protective member 4 and the side wall outer surface of the main body 2, and By providing the second locking portion 6 that temporarily holds the exposed state of the friction portion between the protective member 4 and the outer surface of the side wall of the main body 2, the friction portion coating stabilized by the first locking portion 5 is provided. The state can be maintained, and a stable friction operation can be performed by the second locking portion 6.

<Second Embodiment>
The thermochromic writing instrument 1 of the 2nd Embodiment of this invention of FIG. 7 thru | or FIG. 12 is shown.
The thermochromic writing instrument 1 of the present embodiment includes a cylindrical main body 2, a friction part 3, and a protection member 4.

Main body The main body 2 is a cylindrical body and is made of synthetic resin or metal. The main body 2 is, for example, a detachable cap on the pen nib side of the shaft cylinder, and the shaft cylinder has one end of a nib in which the thermochromic ink is accommodated and the thermochromic ink can be discharged. Prepare for.

-Friction part Friction part 3 is provided on the top side wall outer surface of main body 2 (the upper end side wall outer surface of main body 2). The friction part 3 is made of a low-abrasion elastic material (for example, silicone resin, SBS resin, SEBS resin), and is fixed to the outer surface of the upper end side wall of the main body 2. Further, the friction part 3 is brought into contact with the upper end part of the mounting convex part 21 and can reliably prevent the rearward movement of the friction body during friction.

Attachment convex portion A substantially rectangular parallelepiped attachment convex portion 21 is formed on the outer surface of the side wall of the main body 2. The mounting convex portion 21 is positioned below the friction portion 3 on the same axis passing through the friction portion 3. Slide grooves 21 a are formed on the outer surfaces of both side walls of the mounting convex portion 21. At both ends of the slide groove 21a, climbing protrusions 51 and 61 are formed with which the engaging protrusions 42a can be temporarily engaged. The height in the radial direction of the mounting convex portion 21 is set to be substantially equal to the height in the radial direction of the friction portion 3 or higher than the height in the radial direction of the friction portion 3. The circumferential width dimension of the mounting projection 21 is set to be approximately equal to the circumferential width dimension of the friction part 3 or larger than the circumferential width dimension of the friction part 3.

-Protective member The said protective member 4 is attached to the attachment convex part 21 of the main body 2 so that sliding is possible to an axial direction. The protective member 4 includes a covering portion 41, an attachment portion 42, and a clip portion 43 (a clip portion that can be held in a pocket of clothes). The covering portion 41 and the mounting portion 42 have a U-shaped cross section, and a pair of mounting portions 42 are integrally connected from both sides of the covering portion 41. Engaging protrusions 42 a are formed on both inner surfaces of the mounting portion 42. The engaging protrusion 42a is slidably provided in the slide groove 21a. The engagement protrusion 42a can be temporarily locked with the over-ride protrusions 51 and 61 at both ends of the slide groove 21a. The covering portion 41 and the attachment portion 42 serve as a base portion of the clip portion 43.

In the present embodiment, the engagement protrusion 42a can be temporarily locked with the overpass protrusions 51 and 61 at both ends of the slide groove 21a. That is, the climbing projection 51 and the engagement projection 42a at the upper end of the slide groove 21a constitute the first locking portion 5, and the climbing projection 51 and the engagement projection 42a at the upper end of the slide groove 21a are temporarily When locked, the friction part covering state is maintained. On the other hand, the climbing projection 61 and the engaging projection 42a at the lower end of the slide groove 21a constitute the second locking portion 6, and the climbing projection 61 and the engaging projection 42a at the lower end of the slide groove 21a temporarily. When locked, the frictional part exposed state is maintained.

In the thermochromic writing instrument 1 of the present embodiment, the friction part 3 is provided on the outer surface of the side wall of the cylindrical body 2, and the protective member 4 that is movable in the axial direction is provided on the outer surface of the side wall of the cylindrical body 2. When the friction part 3 is not used, the protection member 4 covers the outer surface in the radial direction of the friction part 3, and when the friction part 3 is used, the protection member 4 is moved away from the friction part 3. By arranging and exposing the outer surface in the radial direction of the friction portion 3 to the outside, the protective member 4 can be used for friction even when stored in a pen case, a pen stand, or a pocket of clothes when not in use. It is avoided that the portion 3 comes into contact with other articles (for example, the outer surface of other writing instruments, the inner surface of a pen case, the bottom surface of a pen stand, or the inner surface of a pocket of clothes), and the friction portion 3 is stained when not in use. Can be prevented.

The thermochromic writing instrument 1 according to the present embodiment is provided with a mounting convex portion 21 on the outer surface of the side wall of the main body 2, and the protective member 4 is mounted on the mounting convex portion 21 so as to be movable in the axial direction. The protective member 4 is attached to the main body 2 by including a covering portion 41 that covers the radial outer surface of the mounting convex portion 21 when the friction portion 3 is used and covers the radial outer surface of the friction portion 3 when the friction portion 3 is not used. While being able to attach appropriately, the friction part 3 can be appropriately coat | covered with the protection member 4 at the time of non-use of a friction part.

In the thermochromic writing instrument 1 of the present embodiment, the mounting convex portion 21 is provided at a position below the friction portion 3 on the same axis passing through the friction portion 3, so that a protective member is used when the friction portion is not used. 4 can coat the friction part 3 appropriately.

In the thermochromic writing instrument 1 according to the present embodiment, the height in the radial direction of the mounting convex portion 21 is substantially equal to the height in the radial direction of the friction portion 3 or the radial height of the friction portion 3. By setting it high, the friction member 3 can be properly and reliably covered with the protection member 4 without being caught by the friction member 3 when the protection member 4 is moved upward from the exposed state of the friction portion.

In the thermochromic writing instrument 1 of the present embodiment, the circumferential width dimension of the mounting projection 21 is substantially equal to the circumferential width dimension of the friction part 3 or the circumferential width of the friction part 3. By setting the size larger than the dimension, when the protective member 4 is moved upward from the exposed state of the friction portion, the protective member 4 is properly and reliably covered with the protective member 4 without being caught by the friction portion 3. it can.

The thermochromic writing instrument 1 of the present embodiment is provided with a first locking portion 5 that temporarily holds the friction portion covering state between the protective member 4 and the side wall outer surface of the main body 2, and By providing the second locking portion 6 that temporarily holds the exposed state of the friction portion between the protective member 4 and the outer surface of the side wall of the main body 2, the friction portion coating stabilized by the first locking portion 5 is provided. The state can be maintained, and a stable friction operation can be performed by the second locking portion 6.

DESCRIPTION OF SYMBOLS 1 Thermochromic writing instrument 2 Main body 21 Attachment convex part 21a Slide groove 22 Operation part 3 Friction part 4 Protection member 41 Covering part 42 Attachment part 42a Engagement protrusion 43 Clip part 5 First latching part 51 Overpass protrusion 6 Second Locking part 61

Claims (6)

The cylindrical main body is provided with a friction portion made of a low-abrasion elastic material capable of thermally discoloring the handwriting of the thermochromic ink by frictional heat generated at that time, and the thermochromic ink inside The frictional portion is provided on the outer surface of the side wall of the cylindrical main body, and a protective member that is movable in the axial direction is provided on the outer surface of the side wall of the cylindrical main body. When not in use, the protection member covers the radially outer surface of the friction portion, and when the friction portion is in use, the protection member is disposed at a position spaced downward from the friction portion, and the radial outer surface of the friction portion is disposed. A thermochromic writing instrument characterized by being exposed to the outside. An attachment convex part is provided on the outer surface of the side wall of the main body, and the protective member covers the radial outer surface of the attachment convex part when the friction part is used, an attachment part attached to the attachment convex part so as to be movable in the axial direction; claim 1 thermochromic writing instrument further comprising a cover portion which covers the radially outer surface of the friction portion when not in use the friction portion. The thermochromic writing instrument according to claim 2, wherein the attachment convex portion is provided at a position below the friction portion on the same axis passing through the friction portion. The thermochromic writing instrument according to claim 3, wherein the radial height of the mounting convex portion is set to be substantially equal to the radial height of the friction portion or higher than the radial height of the friction portion. The thermal discoloration according to claim 3 or 4, wherein a circumferential width dimension of the mounting convex portion is set to be substantially equal to a circumferential width dimension of the friction portion or larger than a circumferential width dimension of the friction portion. Sex writing instrument. A first locking portion that temporarily holds the friction portion covering state is provided between the protective member and the outer surface of the side wall of the main body, and the friction portion is exposed between the protective member and the outer surface of the main body side wall. The thermochromic writing instrument according to any one of claims 1 to 5, further comprising a second locking portion for temporarily holding the second locking portion.

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