JP2009066892A - Friction implement - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a friction implement capable of selecting and using a friction part having an external shape suitable for a desired thermal discoloration area. <P>SOLUTION: The friction implement 1 can thermally discolor handwriting of thermochromic ink by frictional heat generated by rubbing the handwriting of the thermochromic ink. The friction implement comprises a first holder 2, a second holder 3 and a third holder 4. The first holder 2 has a first friction part 51 at one end and an insertion hole 22 at the other end. The second holder 3 has a second friction part 61 at one end and a third friction part 62 at the other end. The third holder 4 has an insertion hole 41 at one end. A first insertion part 31 of the second holder 3 can be inserted in the insertion holes 22, 41, and a second insertion part 32 of the second holder 3 can be inserted in the insertion holes 22, 41. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

The present invention relates to a friction tool. Specifically, the present invention relates to a friction tool capable of thermally changing the handwriting of the thermochromic ink by rubbing the handwriting of the thermochromic ink on the writing surface (for example, paper surface) with frictional heat generated at that time.

Conventionally, in a thermochromic writing instrument incorporating a thermochromic ink, Patent Document 1 discloses a configuration in which a friction body for thermally discoloring a handwriting by a thermochromic ink by frictional heat is provided on the top of the cap. The structure provided in the rear end is described.

JP 2004-148744 A

Conventionally, when a thermochromic ink handwriting is thermally discolored using a friction body, when a small area of the thermochromic ink handwriting is to be discolored, or a large area of the thermochromic ink handwriting is to be discolored There is a case. Since the conventional thermochromic writing instrument has only one type of friction body at one end of the shaft cylinder or the cap, there is a possibility that a friction body suitable for a desired thermochromic area cannot be used.

The present invention is intended to solve the above-mentioned conventional problems, and to provide a friction tool that can select and use a friction portion having an outer shape suitable for a desired thermal discoloration area. .

The first invention of the present application is a friction tool capable of thermally changing the handwriting of the thermochromic ink by frictional heat generated by rubbing the handwriting of the thermochromic ink, and the first friction part 51 at one end. And a second holder 3 having a second friction part 61 at one end and a third friction part 62 at the other end, and a first holder 2 having an insertion hole 22 at the other end, The first holder 31 is provided with an insertion hole 41 at one end, and a first insertion portion 31 is provided on the outer surface of the second holder 3 on the second friction portion 61 side. The attachment portion 31 can be inserted into the insertion hole 22 of the first holder 2 and can be inserted into the insertion hole 41 of the third holder 4, so that the third friction of the second holder 3 can be achieved. A second insertion portion 32 is provided on the outer surface on the side of the portion 62, and the second insertion portion 32 can be inserted into the insertion hole 22 of the first holder 2. In addition, it can be inserted into the insertion hole 41 of the third holder 4, and the handwriting of the thermochromic ink can be performed by any of the first friction part 51, the second friction part 61, and the third friction part 62. The first frictional part 51, the second frictional part 61, and the third frictional part 62 are different in outer shape (claim 1).

Since the friction tool 1 of the first invention includes at least three types of friction parts (first friction part 51, second friction part 61, and third friction part 62) having different outer shapes, desired heat is provided. A friction part having an outer shape suitable for the discoloration area can be selected and used.

According to a second invention of the present application, in the first invention, a flange 33 is provided on the outer surface of the second holder 3 between the first insertion portion 31 and the second insertion portion 32, When the insertion portion 31 or the second insertion portion 32 of the first holder 2 is inserted into the insertion hole 22 of the first holder 2, the flange portion 33 comes into contact with the end portion of the first holder 2, and the first When the insertion portion 31 or the second insertion portion 32 is inserted into the insertion hole 41 of the third holder 4, the flange portion 33 comes into contact with the end portion of the third holder 4 (claim) Item 2) is a requirement.

In the friction tool 1 of the second invention, when the second holder 3 is inserted into the insertion hole 22 of the first holder 2, the flange 33 abuts against the end of the first holder 2, When the second holder 3 is inserted into the insertion hole 41 of the third holder 4, the flange 33 comes into contact with the end of the third holder 4, so that the insertion hole 22 of the first holder 2 is inserted. The insertion amount of the first insertion portion 31 into the insertion hole 41 of the inner holder or the third holder 4, and the insertion hole 22 of the first holder 2 or the insertion hole 41 of the third holder 4 The insertion amount of the second insertion portion 32 can be kept constant. Furthermore, in the friction tool 1 of the second invention, the second holder 3 is immersed in the insertion hole 22 of the first holder 2 or the insertion hole 41 of the third holder 4 when using friction. Therefore, the stable insertion state between the first holder 2 and the second holder 3 and the stable insertion state between the third holder 4 and the second holder 3 can be maintained.

According to a third invention of the present application, in the first invention or the second invention, the thermochromic ink is accommodated in the third holder 4 and is opposite to the insertion hole 41 of the third holder 4. It is a requirement that a pen point 42 capable of discharging the thermochromic ink is provided at the end (Claim 3).

Since the friction tool 1 of the third invention includes the thermochromic ink and the pen tip 42 that can eject the ink, the formation of the handwriting of the thermochromic ink and the thermal discoloration of the handwriting are: It is obtained by one friction tool.

According to a fourth invention of the present application, in the first, second or third invention, the core body 6 having the second friction part 61 at one end and the third friction part 62 at the other end is provided. The second friction member 61 is inserted into the through hole 34 of the second holder 3, the second friction portion 61 protrudes outside from one end of the second holder 3, and the third friction portion 62 extends outside from the other end of the second holder 3. It is a requirement that (1) be protruded.

The friction tool 1 of the fourth invention can be provided at a low cost with a simple structure.

Friction part In the present invention, the first friction part 51, the second friction part 61, and the third friction part 62 are preferably made of a soft material. Examples of the soft material constituting the first friction part 51, the second friction part 61, and the third friction part 62 include elastic resins (rubber and elastomer), such as silicone resin and SBS resin. (Styrene-butadiene-styrene copolymer), SEBS resin (styrene-ethylene-butadiene-styrene copolymer), fluorine resin, chloroprene resin, nitrile resin, polyester resin, ethylene propylene diene rubber (EPDM) and the like. It is done. The soft material constituting the first friction part 51, the second friction part 61, and the third friction part 62 is erased at the time of friction rather than that made of a highly wearable elastic material (for example, an eraser). It is preferably made of a low-abrasion elastic material that does not cause residue.

In the present invention, the pen tip 42 has, for example, a ballpoint pen tip, a fiber bundle resin processed body, a fiber bundle heat-bonded processed body, a felt processed body, a pipe-shaped pen body, and a slit at the tip. Examples thereof include a fountain pen type plate pen body, a brush pen body, a porous foam body of a synthetic resin, and an extruded body of a synthetic resin having an axial ink guide path.

-Insertion structure In addition, in this invention, the insertion structure of the 1st insertion part 31 and the insertion hole 22 of the 1st holder 2, and the insertion of the 1st insertion part 31 and the 3rd holder 4 are attached. Insertion structure with the hole 41, insertion structure with the second insertion part 32 and the insertion hole 22 of the first holder 2, insertion hole 41 with the second insertion part 32 and the third holder 4 As the insertion structure, a means such as fitting, screwing or engagement is adopted.

Third Holder In the present invention, the third holder 4 includes a pen tip holding member for holding the pen tip 42 and a tail plug attached to the third holder 4 on the side opposite to the pen tip. As a configuration for accommodating the thermochromic ink in the third holder 4, for example, a direct liquid type that directly accommodates the thermochromic ink inside, or a batting type that impregnates the ink occlusion body with the thermochromic ink, etc. Can be mentioned.

-Thermochromic ink In the present invention, 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 microcapsule pigment in which a reversible thermochromic composition containing at least three essential components of a reaction medium for determining the occurrence temperature of the microcapsule is preferably used.

In the present invention, as shown in FIG. 10, the shape of the curve plotting the change in the color density due to the temperature change is opposite to the case where the temperature is raised from the lower temperature side than the color change temperature range, and from the higher temperature side than the color change temperature range. The color changes by following a different path depending on the descending state, and the color development state in the low temperature range below the complete color development temperature (t ₁ ) or the color erase state in the high temperature range above the complete color erase temperature (t ₄ ) It is preferable to apply a color memory retention type thermochromic ink that can be stored and retained in a specific temperature range [temperature range between t _{2 and} t ₃ (substantially two-phase retention temperature range)]. In FIG. 10, ΔH represents 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 invention, the color change temperature due to frictional heat of the friction part of the thermochromic ink 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.

The reversible thermochromic microcapsule pigment preferably has an average particle diameter in the range of 0.5 to 5.0 μm, preferably 1 to 4 μm. When the average particle diameter exceeds 5.0 μm, the outflow from the capillary gap of the ballpoint pen tip or the porous pen body decreases, and when the average particle diameter is 0.5 μm or less, it is difficult to show high density color development. .

The reversible thermochromic microcapsule pigment can be blended in an amount of 2 to 50% by weight (preferably 3 to 40% by weight, more preferably 4 to 30% by weight) based on the total amount of the ink composition. If it is less than 2% by weight, the color density is insufficient, and if it exceeds 50% by weight, the ink outflow is reduced and the writing property is impaired.

The friction tool of the present invention can be used by selecting a friction part having an outer shape suitable for a desired thermal discoloration area.

Embodiments of the friction tool of the present invention are shown in FIGS.
The friction tool 1 according to the present embodiment includes a first holder 2, a second holder 3, and a third holder 4. The first holder 2 includes a first friction part 51 at one end and an insertion hole 22 at the other end. The second holder 3 includes a second friction part 61 at one end and a third friction part 62 at the other end. The third holder 4 has an insertion hole 41 at one end.

-1st holder The 1st holder 2 is a cylindrical body obtained by the injection molding of a synthetic resin. An attachment hole 21 is provided at one end of the first holder 2, and an annular inward projection 21 a is formed on the inner surface of the attachment hole 21. An insertion hole 22 is provided at the other end of the first holder 2.

A first soft member 5 having a first friction part 51 is inserted into the mounting hole 21 at one end of the first holder 2, and the first friction part 51 is inserted from one end of the first holder 2. It protrudes to the outside. The outer surface of the first soft member 5 includes a fitting portion 52 that can be fitted into the mounting hole 21 and a first friction portion 51 that protrudes to the outside. An annular outward projection 53 is formed on the outer surface of the fitting portion 52, and a step portion 54 is formed at the rear end of the first friction portion 51. When the first soft member 5 is inserted into the first holder 2, the outward projection 53 on the outer surface of the first soft member 5 gets over and locked with the inward projection 21 a on the inner surface of the mounting hole 21. The portion 54 is brought into contact with the end portion of the first holder 2, and the first friction portion 51 is protruded to the outside from the first holder 2. The first soft member 5 is made of a low-abrasion elastic material (for example, SBS resin or SEBS resin) that does not cause debris during friction. The top of the first friction part 51 is formed in a convex curved shape.

Second holder The second holder 3 is a cylindrical body obtained by injection molding of synthetic resin. The second holder 3 has an axial through hole 34 inside. In addition, a flange 33 is provided in a ring shape on the outer surface of the intermediate portion of the second holder 3. A first insertion portion 31 is formed on the outer surface of the second holder 3 on the second friction portion 61 side from the flange portion 33 of the second holder 3, and a third friction portion is formed on the outer surface of the flange portion 33 of the second holder 3. A second insertion portion 32 is formed on the outer surface on the 62 side. The first insertion portion 31 and the second insertion portion 32 have the same outer diameter. When the first insertion portion 31 or the second insertion portion 32 is inserted into the insertion hole 22 of the first holder 2, the flange portion 33 comes into contact with the end portion of the first holder 2, and When the first insertion portion 31 or the second insertion portion 32 is inserted into the insertion hole 41 of the third holder 4, the flange portion 33 comes into contact with the end portion of the third holder 4.

A second soft member 6 (that is, the core body 6) made of a low-abrasion elastic material (for example, SBS resin or SEBS resin) that does not generate debris during friction is inserted into the through-hole 34. The second soft member 6 includes a second friction part 61 at one end and a third friction part 62 at the other end. The second soft member 6 is fitted into the through hole 34 of the second holder 3, the second friction portion 61 protrudes from one end of the second holder 3, and the other of the second holder 3. The third friction part 62 protrudes from the end to the outside. The second friction portion 61 has a convex curved top. The third friction portion 62 has a flat top portion and a convex curved peripheral portion around the top portion.

The curvature radius of the convex curved top of the second friction part 61 is different from the curvature radius of the convex curved top of the first friction part 51. Specifically, the radius of curvature of the convex curved top of the second friction portion 61 is set smaller than the radius of curvature of the convex curved top of the first friction portion 51.

The first insertion portion 31 and the second insertion portion 32 on the outer surface of the second holder 3 are detachably inserted into the insertion holes 22 of the first holder 2. The first insertion portion 31 and the second insertion portion 32 of the second holder 3 are detachably inserted into the insertion holes 41 of the third holder 4.

Third Holder The inner diameter of the insertion hole 41 at one end of the third holder 4 is set to be approximately equal to the outer diameter of the first insertion portion 31 and the outer diameter of the second insertion portion 32. Thereby, the first insertion portion 31 and the second insertion portion 32 of the second holder 3 are detachably inserted into the insertion holes 41 of the third holder 4.

The other end of the third holder 4 is provided with a pen tip 42 made of a ballpoint pen tip or a marking pen, and a thermochromic ink is accommodated in the third holder 4. The thermochromic ink is discharged to the outside, and a handwriting of the thermochromic ink is formed on the writing surface (for example, paper surface). A cap (not shown) is detachably provided on the pen tip side of the third holder 4. In the present embodiment, the first holder 2 is provided separately from the cap. However, other than this, the first holder 2 may also serve as the cap.

In the thermochromic ink, the low temperature side color change point (complete color development temperature t ₁ ) is set to an arbitrary temperature in the range of −30 ° C. to −10 ° C., and the high temperature side color change point (complete color disappearance temperature t ₄ ) is 60. A reversible thermochromic ink that is set at an arbitrary temperature in the range of from 80 ° C. to 80 ° C. and has a hysteresis width ΔH in the range of from 40 ° C. to 60 ° C. is employed.

As shown in FIG. 1, the first insertion portion 31 of the second holder 3 is inserted into the insertion hole 22 of the first holder 2, and the second insertion is performed in the insertion hole 41 of the third holder 4. The second insertion portion 32 of the holder 3 is inserted. At this time, the first friction part 51 is exposed to the outside from the first holder 2, the second friction part 61 is accommodated in the second holder 3, and the third friction part 62 is the third holder 4. Housed inside. In this state, the first friction part 51 can be used by holding the first holder 2 or the third holder 4.

As shown in FIG. 2, the first friction portion 51 can be used by gripping the first holder 22 in a state where the first holder 2 is separated from the second holder 3.

As shown in FIG. 3, the second holder 3 is separated from the first holder 2 and the third holder 4, and the second friction part 61 and the third friction are held by holding the second holder 3. Part 62 can be used.

As shown in FIG. 5, the first insertion portion 31 of the second holder 3 is inserted into the insertion hole 22 of the first holder 2, and the second holder 3 and the third holder 4 are separated. Let At this time, the third friction part 62 is exposed to the outside, and the second friction part 61 is accommodated in the second holder 3. By holding the first holder 2 in this state, the first friction part 51 and the third friction part 62 can be used.

As shown in FIG. 6, the second insertion portion 32 of the second holder 3 is inserted into the insertion hole 22 of the first holder 2, and the second holder 3 and the third holder 4 are separated. Let At this time, the second friction part 61 is exposed to the outside, and the third friction part 62 is accommodated in the second holder 3. By holding the first holder 2 in this state, the first friction part 51 and the second friction part 61 can be used.

As shown in FIG. 7, the second insertion portion 32 of the second holder 3 is inserted into the insertion hole 41 of the third holder 4, and the first holder 2 and the second holder 3 are separated. Let At this time, the second friction part 61 is exposed to the outside, and the third friction part 62 is accommodated in the third holder 4. In this state, the second friction part 61 can be used by gripping the third holder 4.

As shown in FIG. 8, the first insertion portion 31 of the second holder 3 is inserted into the insertion hole 41 of the third holder 4, and the first holder 2 and the second holder 3 are separated. Let At this time, the third friction part 62 is exposed to the outside, and the second friction part 61 is accommodated in the third holder 4. In this state, the third friction part 62 can be used by gripping the third holder 4.

In the friction tool 1 of the present embodiment, the outer shape of the first friction portion 51, the outer shape of the second friction portion 61, and the outer shape of the third friction portion 62 are different (that is, pressing with a constant load). The contact area with the writing surface when the first friction part 51, the second friction part 61, and the third friction part 62 are different from each other). In this case, the friction part having a large contact area with the writing surface under a constant load (for example, the first friction part 51 having a large curvature radius of the convex curved top part or the third friction part having a planar top part). Part 62) can be selected and used. On the other hand, when the handwriting of a small area thermochromic ink is thermally discolored, a friction part (for example, a convex curved surface having a small contact area with the writing surface under a constant load) can be used. It has the 2nd friction part 61 with a small curvature radius of a top part, and the peripheral part of a convex curve shape 3 of the friction portion 62) selected and can be used. Thereby, the friction tool 1 selects the friction part (the first friction part 51, the second friction part 61, or the third friction part 62) having an outer shape suitable for a desired thermal discoloration area. Can be used.

In the embodiment of the present invention, the first insertion portion of the second holder is inserted into the insertion hole of the first holder, and the second holder is inserted into the insertion hole of the third holder. It is a longitudinal cross-sectional view which shows the state which inserted 2 insertion parts. It is a longitudinal cross-sectional view of the 1st holder of FIG. It is a longitudinal cross-sectional view of the 2nd holder of FIG. It is a longitudinal cross-sectional view of the 3rd holder of FIG. It is a longitudinal cross-sectional view of the 1st holder and 2nd holder which show the state which inserted the 1st insertion part of the 2nd holder in the insertion hole of the 1st holder of FIG. It is a longitudinal cross-sectional view of the 1st holder and 2nd holder which show the state which inserted the 2nd insertion part of the 2nd holder in the insertion hole of the 1st holder of FIG. It is a longitudinal cross-sectional view of the 2nd holder and 3rd holder which show the state which inserted the 2nd insertion part of the 2nd holder in the insertion hole of the 3rd holder of FIG. It is a longitudinal cross-sectional view of the 2nd holder and 3rd holder which show the state which inserted the 1st insertion part of the 2nd holder in the insertion hole of the 3rd holder of FIG. It is a principal part longitudinal cross-sectional view which shows the whole of FIG. It is explanatory drawing which shows the color change behavior of a thermochromic ink.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Friction tool 2 1st holder 21 Mounting hole 21a Inward protrusion 22 Insertion hole 3 2nd holder 31 1st insertion part 32 2nd insertion part 33 Gutter 34 Through-hole 4 3rd holder 41 Insertion Contact hole 42 Pen tip 5 First soft member 51 First friction part 52 Insertion part 53 Outward protrusion 54 Step part 6 Second soft member (core body)
61 2nd friction part 62 3rd friction part

Claims (4)

A friction tool capable of thermally discoloring the thermochromic ink handwriting by frictional heat generated by rubbing the handwriting of the thermochromic ink, and having a first friction part (51) at one end and the other end A first holder (2) having an insertion hole (22), and a second holder having a second friction part (61) at one end and a third friction part (62) at the other end ( 3) and a third holder (4) having an insertion hole (41) at one end, and the first holder is provided on the outer surface of the second holder (3) on the second friction part (61) side. An insertion portion (31) is provided, and the first insertion portion (31) can be inserted into the insertion hole (22) of the first holder (2) and the third holder (4) The second insertion portion (32) is provided on the outer surface of the second holder (3) on the third friction portion (62) side, and can be inserted into the insertion hole (41). The attachment portion (32) can be inserted into the insertion hole (22) of the first holder (2) and can be inserted into the insertion hole (41) of the third holder (4), Any of the first friction part (51), the second friction part (61), and the third friction part (62) can thermally change the handwriting of the thermochromic ink with frictional heat, The friction tool characterized in that the outer shapes of the friction part (51), the second friction part (61), and the third friction part (62) are different. A flange (33) is provided on the outer surface of the second holder (3) between the first insertion portion (31) and the second insertion portion (32), and the first insertion portion (31). Alternatively, when the second insertion portion (32) is inserted into the insertion hole (22) of the first holder (2), the flange portion (33) contacts the end portion of the first holder (2). When the first insertion portion (31) or the second insertion portion (32) is inserted into the insertion hole (41) of the third holder (4), the flange portion (33) is The friction tool according to claim 1, wherein the friction tool is in contact with an end of the holder (4). A nib that contains thermochromic ink in the third holder (4) and can eject the thermochromic ink to the end of the third holder (4) opposite to the insertion hole (41). The friction tool according to claim 1 or 2, further comprising (42). The core body (6) having the second friction part (61) at one end and the third friction part (62) at the other end is inserted into the through hole (34) of the second holder (3). Then, the second friction part (61) protrudes outside from one end of the second holder (3), and the third friction part (62) protrudes outside from the other end of the second holder (3). The friction tool according to any one of claims 1 to 3.

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