JP2014193572A - Thermochromic writing instrument - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a thermochromic writing instrument capable of preventing a friction body from becoming dirty when not in use.SOLUTION: A thermochromic writing instrument 1 comprises a friction part 31 which is made of a low abrasive elastic material, which can heat-discolor writing by frictional heat generating when the writing of the thermochromic ink is rubbed, and in which thermochromic ink is accommodated. A protective member 4 is provided in the vicinity of the friction part 31 of a body 2. The protective member 4 is provided in a manner movable in an axial direction, and it is always energized frontward in an axial direction by a resilient body 5. When the friction part 31 is not in use, a top part of the protective member 4 is projected further frontward in the axial direction than a top part of the friction part 31. When the friction part 31 is in use, the protective member 4 is moved backward in the axial direction by a contact between a writing surface 6 and the top part of the protective member 4.

Description

The present invention comprises a friction part made of a low-abrasion elastic material capable of rubbing the handwriting of the thermochromic ink at the end of the cylindrical main body and heat-discoloring the handwriting with frictional heat generated at that time, and The present invention relates to a thermochromic writing instrument that contains a thermochromic ink therein.

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).

Japanese Patent Laid-Open No. 2007-223302

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, “front” refers to the friction part side, and “rear” refers to the opposite side.

1st invention of this application is the friction which consists of a low-abrasion elastic material which can rub the handwriting of thermochromic ink to the edge part of the cylindrical main body 2, and can thermally change the handwriting by the frictional heat which arises in that case A thermochromic writing instrument comprising a portion 31 and containing a thermochromic ink therein, wherein a protective member 4 is provided in the vicinity of the friction portion 31 of the main body 2, and the protective member 4 is disposed in the axial direction. It is provided so as to be movable, and is always urged forward in the axial direction by the elastic body 5, and when the friction part 31 is not used, the top part of the protection member 4 projects forward in the axial direction from the top part of the friction part 31, When the friction part 31 is used, it is a requirement that the protective member 4 is moved rearward in the axial direction by contact between the writing surface 6 and the top of the protective member 4.

In the thermochromic writing instrument 1 of the first invention, a protective member 4 is provided in the vicinity of the friction portion 31 of the main body 2, and the protective member 4 is provided so as to be movable in the axial direction and is provided with an elastic body 5. Always biased forward in the axial direction, when the friction part 31 is not used, the top of the protection member 4 protrudes forward in the axial direction from the top of the friction part 31, and when the friction part 31 is used, the writing surface When the protective member 4 is moved axially rearward due to the contact between the protective member 4 and the top of the protective member 4, it is stored and stored in a pen case, a pen stand, or a clothes pocket when not in use. However, the protective member 4 prevents the frictional portion 31 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 is not used. Prevents the friction part 31 from getting dirty at times Kill. 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. In the present invention, the protection member 4 may be disposed at least in the vicinity of the friction part 31, and the shape of the friction part 31 and the shape of the protection member 4 may be any.

According to a second invention of the present application, in the thermochromic writing instrument 1 of the first invention, the friction part 31 is provided with an in / out hole 32 that opens forward in the axial direction. The top part of the said protection member 4 protrudes in the axial direction front from the hole 32, and the top part of the said protection member 4 immerses in the said intrusion hole 32 when the said friction part 31 is used.

In the thermochromic writing instrument 1 according to the second aspect of the present invention, the friction part 31 is provided with an in / out hole 32 that opens forward in the axial direction, and when the friction part 31 is not in use, the intrusion hole 32 is axially forward from the in / out hole 32. The top of the protection member 4 protrudes, and when the friction portion 31 is used, the protection member 4 in the vicinity of the friction portion 31 can be easily provided by immersing the top of the protection member 4 into the intrusion hole 32. it can. The protrusion / recess hole 32 may be opened at least axially forward, and may also be opened radially outward in a cutout shape.

According to a third invention of the present application, in the thermochromic writing instrument 1 according to the second invention, the protection member 4 slides in the recess / exit hole 32 and the top portion protrudes forward from the recess / exit hole 32. 41 and a convex portion 42 projecting radially outward from the outer surface of the rear end portion of the rod portion 41, and an accommodation hole 32 having an inner diameter larger than that of the recess / exit hole 32 is provided behind the recess / exit hole 32. In addition, a step portion 34 is formed between the retracting hole 32 and the accommodation hole 32, and the elastic body 5 and the convex portion 42 are accommodated in the accommodation hole 32, and when the friction portion 31 is not used, It is a requirement that the convex portion 42 of the protection member 4 is locked to the step portion 34.

In the thermochromic writing instrument 1 according to the third aspect of the invention, the protection member 4 slides in the in / out hole 32 and the top part protrudes forward from the in / out hole 32, A convex portion 42 projecting radially outward from the outer surface of the rear end portion, and an accommodation hole 32 having an inner diameter larger than that of the appearance hole 32 is connected to the rear of the appearance hole 32 so as to connect the appearance hole 32 and the accommodation position. A step portion 34 is formed between the hole 32 and the projecting body 5 and the convex portion 42 are accommodated in the accommodation hole 32. When the friction portion 31 is not used, the protection member is provided on the step portion 34. Since the four convex portions 42 are locked, the protection member 4 and the elastic body 5 can be appropriately disposed at the end portion of the cylindrical body on the friction portion 31 side.

According to a fourth aspect of the present invention, in the thermochromic writing instrument 1 according to the first, second or third aspect of the invention, the top of the protective member 4 is a convex curved surface.

In the thermochromic writing instrument 1 according to the fourth aspect of the invention, the top of the protective member 4 has a convex curved surface (for example, a hemispherical shape), so that when the friction part 31 is used, the surface of the writing surface 6 can be smoothly smoothed in all directions. Can be slid.

In the present invention, the elastic material constituting the friction part 31 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 31 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 longitudinal cross-sectional view at the time of non-use of the friction part of embodiment of this invention. It is a principal part longitudinal cross-sectional view at the time of use of the friction part of embodiment of this invention.

The thermochromic writing instrument of embodiment of this invention of FIG.1 and FIG.2 is shown.

The friction member 3 made of a low-abrasion elastic material (for example, silicone resin, SBS resin, SEBS resin) is fixed to one end of the cylindrical body 2 of the friction member. A convex curved friction portion 31 is formed on the top or top periphery of the friction member 3. The friction member 3 includes therein a small-diameter recess / exit hole 32 that opens forward, a large-diameter accommodation hole 32 that is connected to the rear of the rear end of the emergence / exit hole 32, and the exit / exit hole 32 and the accommodation hole. And a step portion 34 formed between the upper and lower portions.

Protection member A protection member 4 is provided inside the friction member 3 so as to be movable in the axial direction. The protective member 4 includes a rod portion 41 and a hook-like convex portion 42 that protrudes radially outward from the outer surface of the rear end portion of the rod portion 41. The rod part 41 is slidable in the axial direction in the retracting hole 32, and the convex part 42 is accommodated in the accommodating hole 32 so as to be slidable in the axial direction. The protective member 4 is made of synthetic resin or metal. A top portion of the rod portion 41 is formed in a convex curved surface shape (R curved surface shape).

-Bullet body The protective member 4 is always bullet-biased forward by a bullet body 5 (for example, an elastic body such as a compression coil spring, rubber or sponge). The bullet body 5 is disposed in the accommodation hole 32. The front end of the projectile 5 is brought into contact with the rear surface of the protection member 4, and the rear end of the projectile 5 is brought into contact with the front surface of the main body 2. The elastic load for urging the protective member 4 of the elastic body 5 forward is set at least higher than the weight of the entire thermochromic writing instrument 1.

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 contains a thermochromic ink inside and a pen tip that can discharge the thermochromic ink at one end, or a cap that is detachable on the pen tip side of the shaft cylinder. Is mentioned. When the main body 2 is a shaft cylinder, a friction portion 31 is provided at an end of the shaft cylinder on the side opposite to the pen tip. When the main body 2 is a cap, a friction portion 31 is provided at the closing side end of the cap.

When the working friction portion 31 is not used, the top portion of the rod portion 41 of the protection member 4 protrudes to the outside from the intrusion hole 32 of the friction portion 31, thereby preventing the friction portion 31 from contacting other articles. To do. When the friction part 31 is used, the writing surface 6 and the top of the protection member 4 come into contact with each other, the protection member 4 is pressed backward by the writing surface 6, the protection member 4 is immersed in the intrusion hole 32, and the friction part 31 can be pressed against the writing surface 6 for use. Thereby, another operation of moving the protection member 4 is not required before the friction operation, and the friction portion 31 can be used quickly.

In the thermochromic writing instrument 1 of the present embodiment, a protective member 4 is provided in the vicinity of the friction part 31 of the main body 2, and the protective member 4 is provided so as to be movable in the axial direction and is pivoted by the elastic body 5. When the friction part 31 is not used, the top of the protection member 4 protrudes forward in the axial direction from the top of the friction part 31, and when the friction part 31 is used, the writing surface 6 When the protective member 4 is moved axially rearward due to contact with the top of the protective member 4, it can be stored in a pen case, a pen stand or a pocket of clothes when not in use. However, the protective member 4 prevents the frictional portion 31 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 when not in use. By preventing the friction part 31 from becoming dirty That.

In the thermochromic writing instrument 1 according to the present embodiment, the friction part 31 is provided with an in / out hole 32 that opens forward in the axial direction, and when the friction part 31 is not in use, the protection is provided in the axial direction forward from the in / out hole 32. The top part of the member 4 protrudes, and when the friction part 31 is used, the protection part 4 near the friction part 31 can be easily provided by immersing the top part of the protection member 4 in the intrusion hole 32. .

In the thermochromic writing instrument 1 according to the present embodiment, the protective member 4 slides in the protrusion / recess hole 32 and has a rod part 41 whose top protrudes forward from the protrusion / recess hole 32, and the rear of the rod part 41. A protrusion 42 projecting radially outward from the outer surface of the end, and an accommodation hole 32 having an inner diameter larger than that of the appearance hole 32 is provided behind the appearance hole 32, and the appearance hole 32 and the accommodation hole A step portion 34 is formed between the protective member 4 and the elastic member 5 and the convex portion 42 in the receiving hole 32. When the friction portion 31 is not used, the step member 34 is provided with the protective member 4. When the convex portion 42 is locked, the protection member 4 and the elastic body 5 can be appropriately disposed at the end portion of the cylindrical body on the friction portion 31 side.

In the thermochromic writing instrument 1 of the present embodiment, the top of the protective member 4 has a convex curved surface, so that when the friction part 31 is used, it can slide smoothly on the writing surface 6 in all directions. it can.

DESCRIPTION OF SYMBOLS 1 Thermochromic writing instrument 2 Main body 3 Friction member 31 Friction part 32 Retraction hole 33 Accommodation hole 34 Step part 4 Protection member 41 Rod part 42 Convex part 5 Elastic body 6 Writing surface

Claims (4)

The end of the cylindrical body is provided with a friction part made of a low-abrasion elastic material capable of rubbing the handwriting of thermochromic ink and heat-discoloring the handwriting with the frictional heat generated at that time. A thermochromic writing instrument containing a color-changing ink, wherein a protective member is provided in the vicinity of the friction portion of the main body, and the protective member is provided so as to be movable in the axial direction and forward in the axial direction by an elastic body. When the friction part is not used, the top of the protection member protrudes forward in the axial direction from the top of the friction part, and when the friction part is used, the writing surface and the top of the protection member The thermochromic writing instrument, wherein the protective member is moved rearward in the axial direction by contact. The friction part is provided with an in / out hole that opens forward in the axial direction, and when the friction part is not used, the top of the protective member protrudes axially forward from the in / out hole, and when the friction part is in use, the in / out hole The thermochromic writing instrument according to claim 1, wherein the top of the protective member is immersed therein. The protective member includes a rod portion that slides in the protrusion and recess and has a top portion protruding forward from the protrusion and recess, and a convex portion that protrudes radially outward from the outer surface of the rear end of the rod portion, A housing hole having an inner diameter larger than the sunken hole is provided behind the sunken hole, a step portion is formed between the sunken hole and the housing hole, and the projectile and the convex are formed in the housing hole. The thermochromic writing instrument according to claim 2, wherein a portion is accommodated and the convex portion of the protection member is locked to the step portion when the friction portion is not used. The thermochromic writing instrument according to claim 1, 2 or 3, wherein the top of the protective member has a convex curved surface.

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