JP2011230440A - Heat-discoloring writing utensil set - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a heat-discoloring writing utensil set using a rubbing element independently of a writing utensil body.SOLUTION: The heat-discoloring writing utensil set 1 includes the writing utensil body 2, a cap 3 and the rubbing element 4. The writing utensil body 2 contains therein heat-discoloring ink and has a pen point 21 from which the heat-discoloring ink can be ejected at its front end. The cap 3 is detachably mounted to the pen point 21 side of the writing utensil body 2. The rubbing element 4 rubs handwriting in the heat-discoloring ink and heat-discolors the handwriting in the heat-discoloring ink with rubbing heat generated when rubbing. The rubbing element 4 is configured to be inserted into and fixed in an opening of the cap 3.

Description

The present invention relates to a thermochromic writing instrument set. More specifically, the present invention relates to a thermochromic writing instrument set comprising a thermochromic writing instrument containing thermochromic ink therein, and a friction body capable of thermally discoloring the handwriting of the thermochromic ink by the thermochromic writing instrument by friction.

Patent Document 1 discloses a configuration in which a friction tool can be inserted into an end portion on the side opposite to the pen tip of a shaft body of a thermochromic writing instrument.

JP 2009-23272 A

The conventional thermochromic writing instrument is provided with a friction tool at the end of the thermochromic writing instrument on the side opposite to the pen tip,
Although it is convenient to carry, it is difficult for users who want to use the friction tool independently.

The present invention solves the above-mentioned conventional problems, and is intended to provide a thermochromic writing instrument set that can use a friction body independently of the writing instrument body.

[1] The first invention of the present application is a writing instrument body 2 that contains a thermochromic ink inside and a pen tip 21 that can eject the thermochromic ink at the front end, and the pen tip of the writing instrument body 2 Thermal discoloration comprising a cap 3 that is detachably attached to the side 21 and a friction body 4 that rubs the handwriting of the thermochromic ink and frictional heat 4 that is capable of thermally discoloring the handwriting of the thermochromic ink by frictional heat generated at that time. It is a sex writing instrument set, and it is a requirement that the friction body 4 can be inserted into the opening of the cap 3.

The thermochromic writing instrument set 1 of the first invention is configured such that the friction body 4 can be inserted into the opening of the cap 3, thereby enabling the friction body 4 to be used independently of the writing instrument body 2. Users who want to use the friction tool independently can be satisfied.

[2] A second invention of the present application is that, in the thermochromic writing instrument set 1 of the first invention, the friction body 4 includes a first friction part 41 provided at one end and a second friction part provided at the other end. And a flange 43 provided on the outer surface between the first friction part 41 and the second friction part 42, and the first friction part 41 and the second friction part 42. Can be inserted into the opening of the cap 3, and when the first friction part 41 or the second friction part 42 is inserted into the opening of the cap 3, the flange 43 of the friction body 4 is The requirement is that the cap 3 is in contact with the open end.

The thermochromic writing instrument set 1 of the second invention can selectively use the first friction part 41 and the second friction part 42 by the above-described configuration, and can stabilize the friction body 4 to the cap 3. Can be held.

[3] In a third invention of the present application, in the thermochromic writing instrument set 1 of the first invention, the friction body 4 includes a first friction portion 41 provided at one end and a second friction portion provided at the other end. And a flange 43 provided on the outer surface between the first friction part 41 and the second friction part 42, and the first friction part 41 and the second friction part 42. Can be inserted into the opening of the small cap, and when the first friction portion 41 or the second friction portion 42 is inserted into the opening of the small cap 5, the flange portion 43 of the friction body 4 is provided. Is in contact with the open end of the small cap 5, and the small cap 5 is formed of a bottomed cylindrical body having one end closed and the other end opened. A fitting portion 51 is provided, a second fitting portion 52 is provided on the outer surface of the small cap 5 on the closing side, and the first fitting portion 51 and the The second fitting portion 52 and the requirements that it has inserted configured to be capable of opening of the cap 3.

The thermochromic writing instrument set 1 of the third aspect of the invention can be used by selecting the first friction part 41 and the second friction part 42 according to the configuration.

[4] A fourth invention of the present application is that the outer surface between the first fitting portion 51 and the second fitting portion 52 of the small cap 5 in the thermochromic writing instrument set 1 of the third invention. When the first fitting portion 51 or the second fitting portion 52 is inserted into the opening of the cap 3, the flange 53 of the small cap 5 is the opening end of the cap 3. It is necessary to be in contact with.

The thermochromic writing instrument set 1 according to the fourth aspect of the present invention can stably hold the friction body 4 on the cap 3 by the above configuration.

-Thermochromic ink The thermochromic ink is preferably a reversible thermochromic ink. The reversible thermochromic ink is a heat decoloring type that decolors by heating from a colored state, a color memory retaining type that reversibly stores and retains a colored state or a decolored state in a specific temperature range, or from a decolored state Various types such as a heating coloring type that develops color by heating and returns to a decolored state by cooling from the colored state can be used alone or in combination.

The coloring material contained in the reversible thermochromic ink includes conventionally known (a) electron donating color-forming organic compounds, (b) electron-accepting compounds, and (c) color reactions of both. A reversible thermochromic pigment in which a reversible thermochromic composition containing at least the essential three components of a reaction medium for determining the occurrence temperature of the polymer is encapsulated in a microcapsule is preferably used.

In the present embodiment, as shown in FIG. 6, the shape of the curve plotting the change in the color density due to the temperature change is higher than the color change temperature range, contrary to the case where the temperature is raised from the lower temperature side than the color change temperature range. The color changes by following a different route from the case of descending from the side, and the color develops in a low temperature region below the complete color development temperature (t ₁ ), or the color erases in a high temperature region above the complete color erase temperature (t ₄ ). A color memory retention type thermochromic ink whose state can be stored and retained in a specific temperature range [temperature range between t _{2 and} t ₃ (substantially two-phase retention temperature range)] is applied. In FIG. 6, ΔH indicates a temperature width (ie, hysteresis width) indicating the degree of hysteresis. When the value of ΔH is small, only one of the two states before and after the color change can exist. When the value of ΔH is large, it is easy to maintain each state before and after the color change.

In the present embodiment, the color change temperature of the thermochromic ink due to the frictional heat of the friction part is set to 25 ° C. to 95 ° C. (preferably 36 ° C. to 95 ° C.). That is, in the present invention, the high temperature side discoloration point [complete decoloring temperature (t ₄ )] is set in a range of 25 ° C. to 95 ° C. (preferably 36 ° C. to 90 ° C.), and the low temperature side discoloration point [ It is effective to set the complete color development temperature (t ₁ )] in the range of −30 ° C. to + 20 ° C. (preferably −30 ° C. to + 10 ° C.). Thereby, it is possible to effectively maintain the color exhibited in the normal state (daily life temperature range), and it is possible to easily change the handwriting by the reversible thermochromic ink with the frictional heat generated by the friction part.

-Friction body In the present invention, it is preferable that the first friction portion 41 and the second friction portion 42 of the friction body 4 are made of an elastic resin (rubber or elastomer). Examples of the resin having elasticity include silicone resin, SBS resin (styrene-butadiene-styrene copolymer), SEBS resin (styrene-ethylene-butadiene-styrene copolymer), fluorine resin, chloroprene resin, nitrile resin, Examples thereof include polyester resins and ethylene propylene diene rubber (EPDM). The elastic material constituting the first friction part 41 and the second friction part 42 (or the elastic material constituting the friction tool 1) is made of a highly wearable elastic material (e.g., an eraser). It is preferably made of a low-abrasion elastic material that does not generate wear debris during friction.

The present invention provides a thermochromic writing instrument set that can use a friction body independently of the writing instrument body.

It is a longitudinal cross-sectional view which shows the usage example of the 1st Embodiment of this invention. It is a longitudinal cross-sectional view which shows the other usage example of the 1st Embodiment of this invention. It is a figure which shows the writing instrument main body of the 1st Embodiment of this invention, a cap, and a friction body. It is a longitudinal cross-sectional view which shows the usage example of the 2nd Embodiment of this invention. It is a longitudinal cross-sectional view which shows the other usage example of the 2nd Embodiment of this invention. It is explanatory drawing which shows the color change behavior of a thermochromic ink.

<First Embodiment>
A first embodiment of the present invention is shown in FIGS.
The thermochromic writing instrument set 1 according to the present embodiment includes a writing instrument body 2, a cap 3, and a friction body 4.

The writing instrument body 2 includes a nib 21 in which thermochromic ink is accommodated and which can discharge the thermochromic ink at one end.

The cap 3 is formed of a bottomed cylindrical body having one end opened and the other end closed. The opening of the cap 3 is detachably attached to the outer surface of the writing instrument body 2 on the pen tip 21 side. A clip 31 that can be held in a pocket or the like is provided on the outer surface of the cap 3.

The friction body 4 includes a first friction portion 41 provided at one end, a second friction portion 42 provided at the other end, and an outer surface between the first friction portion 41 and the second friction portion 42. And a flange 43 provided in The first friction part 41 and the second friction part 42 have different shapes.

The first friction part 41 and the second friction part 42 are configured to be insertable into the opening of the cap 3, and the first friction part 41 or the second friction part 42 is configured to be an opening of the cap 3. When being attached to the flange 3, the flange portion 43 of the friction body 4 comes into contact with the opening end of the cap 3.

<Second Embodiment>
A second embodiment of the present invention is shown in FIGS.
The thermochromic writing instrument set 1 according to the present embodiment includes a writing instrument body 2, a cap 3, a friction body 4, and a small cap 5.

The writing instrument body 2 includes a nib 21 in which thermochromic ink is accommodated and which can discharge the thermochromic ink at one end.

The cap 3 is formed of a bottomed cylindrical body having one end opened and the other end closed. The opening of the cap 3 is detachably attached to the outer surface of the writing instrument body 2 on the pen tip 21 side. A clip 31 that can be held in a pocket or the like is provided on the outer surface of the cap 3.

The friction body 4 includes a first friction portion 41 provided at one end, a second friction portion 42 provided at the other end, and an outer surface between the first friction portion 41 and the second friction portion 42. And a flange 43 provided in The first friction part 41 and the second friction part 42 have different shapes.

The small cap 5 is composed of a bottomed cylinder having one end closed and the other end opened. A first fitting portion 51 is provided on the outer surface on the opening side of the small cap 5, and a second fitting portion 52 is provided on the outer surface on the closing side of the small cap 5, and the first fitting portion 51 and the The second fitting portion 52 is configured to be insertable into the opening of the cap 3.

A flange portion 53 is provided on the outer surface between the first fitting portion 51 and the second fitting portion 52 of the small cap 5, and the first fitting portion 51 or the second fitting portion 52 is provided. When inserted into the opening of the cap 3, the flange portion 53 of the small cap 5 comes into contact with the opening end of the cap 3.

DESCRIPTION OF SYMBOLS 1 Thermochromic writing instrument set 2 Writing instrument main body 21 Pen tip 3 Cap 31 Clip 4 Friction body 41 1st friction part 42 2nd friction part 43 Gutter part 5 Small cap 51 1st fitting part 52 2nd fitting Part 53

Claims (4)

A writing instrument body that contains a thermochromic ink therein and a pen tip capable of discharging the thermochromic ink at the front end, a cap that is detachably attached to the pen tip side of the writing instrument body, and the thermochromic color A thermochromic writing instrument set comprising a friction body capable of thermally changing the thermochromic ink handwriting with frictional heat generated by rubbing the handwriting of the neutral ink,
A thermochromic writing instrument set, wherein the friction body can be inserted into the opening of the cap. The friction body has a first friction part provided at one end, a second friction part provided at the other end, and a flange provided on an outer surface between the first friction part and the second friction part. The first friction part and the second friction part are configured to be insertable into the opening of the cap, and the first friction part or the second friction part is inserted into the opening of the cap. The thermochromic writing instrument set according to claim 1, wherein when worn, the flange portion of the friction body comes into contact with the opening end of the cap. The friction body has a first friction part provided at one end, a second friction part provided at the other end, and a flange provided on an outer surface between the first friction part and the second friction part. The first friction part and the second friction part are configured to be insertable into the opening of the cap, and the first friction part or the second friction part is the opening of the small cap. When inserted into, the flange of the friction body is in contact with the opening end of the small cap,
The small cap is formed of a bottomed cylinder whose one end is closed and the other end is opened, and a first fitting portion is provided on the outer surface on the opening side of the small cap, and the outer surface on the closing side of the small cap is provided. The thermochromic writing instrument set according to claim 1, wherein a second fitting portion is provided, and the first fitting portion and the second fitting portion are configured to be insertable into the opening of the cap. A flange is provided on the outer surface between the first fitting portion and the second fitting portion of the small cap, and the first fitting portion or the second fitting portion is inserted into the opening of the cap. The thermochromic writing instrument set according to claim 3, wherein when worn, the collar portion of the small cap comes into contact with the open end of the cap.

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