JP2018108664A - Thermochromic writing instrument - Google Patents

Abstract

[PROBLEMS] To obtain a stable friction operation when performing a friction operation using a friction portion, and to perform a smooth pressing operation even when a knocking member is pressed forward with one hand even for a relatively small hand. Provides a thermochromic writing instrument. A knock member 8 is integrally formed from an elastic material, and the thermochromic ink handwriting is rubbed against the outer surface of the knock member 8 and the heat-coloring ink handwriting can be thermally discolored by frictional heat generated at that time. The friction part 9 is formed. The knock member 8 is inserted into the rear end hole 41 of the shaft tube 2 and engaged with the rotating member 7, and is integrally connected to the inner tube portion 81 and covers the rear end portion of the shaft tube 2. And an outer cylinder portion 82. A gripping portion 82 a that can be gripped when the friction operation is performed using the friction portion 9 is provided on the outer surface of the outer cylindrical portion 82 of the knock member 8, and the outer cylindrical portion 82 of the knock member 8 is always disposed behind the clip 43. . [Selection] Figure 2

Description

The present invention relates to a thermochromic writing instrument.

Conventionally, for example, in Patent Document 1, a thermochromic ink is accommodated in a cursive body, a pen tip capable of discharging the thermochromic ink is provided at a front end of the cursive body, and the cursive body is disposed in a shaft cylinder. The pen tip protrudes from the front end hole of the shaft cylinder by allowing the knock body to protrude rearward from the rear end hole of the shaft cylinder and pushing the knock body forward from the pen tip immersion state. And a retracting mechanism for retracting the pen tip from the front end hole of the shaft tube into the shaft tube by pressing the knock body forward from the pen tip protruding state, and the retracting mechanism is a cam provided on the inner surface of the shaft tube A rotating member that engages with the cam portion and abuts the rear end of the writing body, a knocking body that engages with the rotating member, and a writing body or rotating member that is accommodated in the shaft cylinder and is attached to the rear side. The knock body is made of an elastic material. Further, a thermochromic writing instrument is disclosed in which a friction part capable of thermally discoloring the handwriting of the thermochromic ink is formed on the outer surface of the knock body by rubbing the handwriting of the thermochromic ink and the frictional heat generated at that time. Yes.

Further, in FIG. 12 of Patent Document 2, an operation portion is provided at the rear end portion of the shaft tube, and the operation portion is pushed forward with respect to the front portion of the shaft tube, so that the pen tip protrudes from the pen tip immersion state. There is disclosed a thermochromic writing instrument provided with a protruding and retracting mechanism, provided with a friction part made of a soft material on the outer surface of the rear end of the operation part, and provided with a grip part and a clip on the outer peripheral surface of the operation part behind the friction part.

JP 2011-156826 A International Publication No. 2008/105227 Pamphlet

In the thermochromic writing instrument described in Patent Document 1, when the friction operation is performed using the friction portion, the knock body (friction portion) moves into the shaft cylinder, and there is a possibility that a stable friction operation cannot be obtained. In addition, when the thermochromic writing instrument described in Patent Document 2 is operated to press the operation portion with one hand, the operation portion is pressed while holding the front portion of the shaft tube. The front end of the operation unit or the clip may come into contact with the palm, and a smooth pressing operation may not be obtained.

The present invention solves the above-described conventional problems. When a friction operation is performed using a friction portion, a stable friction operation is obtained, and when the knock member is pressed forward with one hand, Therefore, it is intended to provide a thermochromic writing instrument capable of obtaining a smooth pressing operation even by a relatively small person.

In the present invention, “front” refers to the pen body side, and “rear” refers to the opposite side. In the present invention, the “pen nib immersive state” refers to a state in which the pen nib is immersed in the shaft cylinder, and the “pen nib protruding state” refers to a state in which the pen nib projects outward from the front end of the shaft cylinder. Say.

The thermochromic writing instrument according to the first invention of the present application contains a thermochromic ink in the cursive body 5, and a pen tip 51 capable of discharging the thermochromic ink is provided at the front end of the cursive body 5, The writing body 5 is accommodated in the shaft cylinder 2 so as to be movable in the front-rear direction, the knock member 8 is protruded rearward from the rear end hole 41 of the shaft cylinder 2, and the knock member 8 is moved forward from the pen tip immersion state. The pen tip 51 is projected from the front end hole 31 of the shaft cylinder 2 by pressing, and the knock member 8 is pressed forward from the pen tip protruding state to push the pen tip 51 to the front end hole of the shaft cylinder 2. 31 is provided with a retracting mechanism for bringing the shaft cylinder 2 into an immersion state, and the retracting mechanism engages with the cam section 6 provided on the inner surface of the shaft cylinder 2 and the rear of the writing body 5. A rotating member 7 in contact with the end, and the knocking member engaged with the rotating member 7. A member 8 and a resilient body 10 housed in the shaft cylinder 2 and biasing the writing body 5 or the rotating member 7 backward, and provided with a clip 43 on the outer surface of the side wall of the shaft cylinder 2, The knock member 8 is integrally formed of an elastic material, and the outer surface of the knock member 8 rubs the handwriting of the thermochromic ink on the outer surface of the knocking member 8. A thermochromic writing instrument having a portion 9, wherein the knock member 8 is inserted into the rear end hole 41 of the shaft tube 2 and engaged with the rotating member 7, and the inner tube An outer cylinder portion 82 that is integrally connected to the portion 81 and covers the rear end portion of the shaft cylinder 2, and when the friction operation is performed on the outer surface of the outer cylinder portion 82 of the knock member 8 using the friction portion 9. Is provided with a gripping portion 82a so that the outer cylindrical portion 82 of the knock member 8 is always To be placed behind the lip 43 to requirements.

The thermochromic writing instrument 1 according to the first invention can grip the gripping portion 82a of the outer cylindrical portion 82 of the knocking member 8 when the frictional operation is performed using the frictional portion 9 by the above-described configuration, and stable friction. Operation becomes possible. Furthermore, in the thermochromic writing instrument 1 according to the first invention, when the knock member 8 is pressed forward with one hand, the front end of the knock member 8 contacts the palm even if the hand is relatively small. And a smooth pressing operation is possible.

In the thermochromic writing instrument 1 according to the second invention of the present application, in the thermochromic writing instrument 1 according to the first invention, the front end of the outer cylinder part 82 is located behind the front end of the inner cylinder part 81. It is a requirement.

The thermochromic writing instrument 1 according to the second aspect of the present invention enables reliable contact between the inner cylinder portion 81 and the rotating member 7 and ensures that the outer cylinder portion 82 is rearward of the clip 43 by the above configuration. Can be placed. As a result, when a friction operation is performed using the friction portion 9, a stable friction operation can be surely obtained, and even when a knocking member 8 is pressed with one hand, even a relatively small hand is smooth. A pressing operation is reliably obtained.

When the thermochromic writing instrument of the present invention performs a friction operation using the friction portion, a stable friction operation is obtained, and even when a knock member is pressed with one hand, even if the hand is relatively small, A smooth pressing operation is obtained.

It is a partial longitudinal cross-sectional view which shows the pen tip immersion state of embodiment of this invention. It is a principal part expanded longitudinal cross-sectional view of FIG. It is a partial longitudinal cross-sectional view which shows the pen tip protrusion state of FIG. FIG. 4 is an enlarged vertical cross-sectional view of a main part of FIG. 3. It is an exploded view which shows the intrusion mechanism of FIG.

Embodiments of the writing instrument of the present invention will be described with reference to the drawings. (See FIGS. 1 to 5)
The thermochromic writing instrument 1 according to the present embodiment includes a shaft tube 2, a writing body 5 accommodated in the shaft tube 2, and a pen tip 51 of the writing body 5 that can be projected and retracted from a front end hole 31 of the shaft tube 2. And a haunting mechanism. The shaft cylinder 2 includes a cylindrical front shaft 3 and a cylindrical rear shaft 4 connected to the rear end of the front shaft 3.

Front shaft The front shaft 3 is a molded body of a synthetic resin having a tapered cylindrical shape. A front end hole 31 is provided in the front end of the front shaft 3 in the front-rear direction. A male thread portion is integrally formed on the outer surface of the rear end opening of the front shaft 3.

Rear shaft The rear shaft 4 is a cylindrical synthetic resin molded body. A rear end hole 41 is provided in the rear end of the rear shaft 4 in the front-rear direction. A step portion 42 is integrally formed on the inner surface of the rear end portion of the rear shaft 4. A cam portion 6 is integrally formed on the inner surface in front of the rear end hole 41 of the rear shaft 4. On the outer surface of the rear shaft 4, a clip 43 that can hold the outer surface of the shaft tube 2 and a pocket or the like is provided. The clip 43 is integrally formed on the outer surface of the rear shaft 4 or is provided by attaching another member. A cylindrical rear end 44 is formed behind the base of the clip 43 of the rear shaft 4. On the inner surface of the front end opening of the rear shaft 4, a female thread is integrally formed. The female screw portion and the male screw portion of the front shaft 3 can be screwed together.

Cursive body The cursive body 5 includes a pen tip 51, an ink storage tube 52 in which the pen tip 51 is press-fitted and fixed to the front end opening, a thermochromic ink filled in the ink storage tube 52, and It consists of a follower (for example, a high-viscosity fluid) that fills the rear end of the thermochromic ink and moves forward as the thermochromic ink is consumed.

-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 nib 51 is composed of, for example, a metal ballpoint pen that holds a ball rotatably at the front end, or a synthetic resin nib holder that holds the rear outer surface of the ballpoint pen tip. Any of these may be used. In addition, a tail plug provided with a vent hole through which the ink containing tube 52 and the outside can be vented may be attached to the rear end opening of the ink containing tube 52.

-Intrusion mechanism The intrusion mechanism is a knock-type intrusion mechanism using a rotating cam mechanism, and is engaged with the cam portion 6 formed on the inner surface of the shaft cylinder 2 (inner surface of the rear shaft 4) and the writing body. 5, a rotating member 7 that contacts the rear end, a knock member 8 that engages with the rotating member 7 and the cam portion 6, and a resilient body 10 that is accommodated in the shaft cylinder 2 and biases the writing body 5 backward. For example, a compression coil spring). The retracting mechanism of the present embodiment is a double knock type in which both the pen tip protruding operation and the pen tip retracting operation press the knock member 8 forward.

The cam portion 6 includes a plurality of serrated cam teeth 61 protruding forward, and a cam groove 62 formed between the cam teeth 61 and engaged with the rotating member 7. The rotating member 7 includes three protrusions 71 extending in the longitudinal direction on the outer surface thereof, and the protrusions 71 are engaged with the cam grooves 62 of the cam portion 6. The knock member 8 includes a guide protrusion 81b that slides in the cam groove 62 of the cam portion 6 and a cam tooth 81a that engages with the rear end of the protrusion 71 of the rotating member 7 at the front end thereof.

-Knock member The knock member 8 is integrally formed from an elastic material. Examples of the elastic material include silicone resin, SBS resin, SEBS resin, and the like.

The knock member 8 includes a bottomed cylindrical inner cylinder part 81 whose front end is opened and its rear end is closed, a bottomed cylindrical outer cylinder part 82 whose front end is opened and whose rear end is closed, The connecting wall portion 83 integrally connects the rear end of the cylindrical portion 81 and the rear end of the outer cylindrical portion 82. The inner cylinder part 81 and the outer cylinder part 82 are arranged in a concentric cross section.

The outer surface of the knock member 8 becomes a friction portion 9 that can rub the handwriting of the thermochromic ink and rub the thermochromic ink with the frictional heat generated at that time. Specifically, the friction part 9 includes, for example, the outer surface of the rear end part of the inner cylinder part 81, the outer surface of the rear end part of the outer cylinder part 82, or the rear surface of the connecting wall part 83.

The inner cylinder portion 81 is inserted into the rear end hole 41 of the shaft cylinder 2 and the front end portion is engaged with the rotating member 7. A cam tooth 81 a that can be engaged with the rotating member 7 is integrally formed at the front end of the inner cylindrical portion 81. A guide protrusion 81 b that slides in the cam groove 62 of the cam portion 6 is integrally formed on the outer surface of the front end portion of the inner cylinder portion 81. In the pen tip immersion state, the guide protrusion 81 b is locked to the step portion 42 of the rear shaft 4, thereby preventing the knock member 8 from coming off from the rear end hole 41. In addition, the front end part of the inner cylinder part 81 provided with the cam tooth 81a and the guide protrusion 81b can also be formed by attachment of another member, and does not need to be formed with an elastic material.

The outer cylinder part 82 is disposed so as to cover the outer surface of the cylindrical rear end part 44 of the shaft cylinder 2. A gripping portion 82 a that can be gripped when the friction operation is performed using the friction portion 9 is formed on the outer surface of the outer cylindrical portion 82 of the knock member 8. Specifically, the outer diameter of the outer cylindrical portion 82 is set to 10 mm or more, thereby enabling stable gripping.

The outer cylinder portion 82 is always disposed behind the base portion of the clip 43 (in the pen tip protruding state and the pen tip immersing state). Accordingly, when the knock member 8 is pushed forward with one hand, when the knock member 8 is pushed with one hand, the front end of the knock member 8 may come into contact with the palm even if the hand is relatively small. Therefore, a smooth pressing operation is possible.

Further, since the entire outer cylinder portion 82 is always exposed to the outside of the shaft cylinder 2, the friction portion 9 is used for friction in any state of the pen tip protruding state and the pen tip immersing state. A gripping portion 82a that can be gripped stably during operation is obtained.

The front end of the outer cylinder part 82 is always positioned in front of the rear end of the shaft cylinder 2. That is, in the pen tip immersion state, the front end of the outer cylinder portion 82 is positioned in front of the rear end of the shaft cylinder 2. Thereby, the outer cylinder part 82 covers the outer surface of the rear end part of the shaft cylinder 2 in the pen tip immersion state. Further, in the pen tip protruding state, the front end of the outer cylinder portion 82 is positioned in front of the rear end of the shaft cylinder 2. Thereby, the said outer cylinder part 82 has covered the rear-end part outer surface of the axial cylinder 2 in the pen tip protrusion state.

At the time of the friction operation, by gripping the gripping portion 82a of the outer tube portion 82, the outer tube portion 82 is elastically deformed inward and is brought into close contact with the outer surface of the shaft tube 2 (the outer surface of the cylindrical rear end portion 44). As a result, the outer surface of the rear end portion of the shaft cylinder 2 (the outer surface of the cylindrical rear end portion 44) is sandwiched between the inner surfaces of the outer cylinder portion 82, the knock member 8 and the shaft cylinder 2 are integrated, and stable friction operation is ensured. Is obtained.

-When the knock member 8 is pushed forward against the rear urging force of the projectile body 10 from the pen tip retracted state, the front end of the knock member 8 (inner cylinder portion 81) moves the rotating member 7 forward. The protrusion 71 of the rotating member 7 moves forward along the cam groove 62. As the rotating member 7 moves forward, the rotating member 7 presses the rear end of the writing body 5 forward, and the pen tip 51 projects outside from the front end hole 31. At this time, the rotating member 7 rotates by a certain angle with respect to the cam portion 6 by the contact between the cam teeth 81 a of the knock member 8 (inner cylinder portion 81) and the protrusion 71 of the rotating member 7. Thereby, the protrusion 71 of the rotating member 7 is engaged with the cam teeth 61 of the cam portion 6 and the pen tip protruding state is maintained.

When the knock member 8 is pressed forward from the pen tip protruding state, the front end of the knock member 8 (inner cylinder part 81) presses the rotating member 7 forward, and the cam teeth 81a of the knock member 8 (inner cylinder part 81) The rotating member 7 is rotated by a certain angle with respect to the cam portion 6 by the contact of the rotating member 7 with the protrusion 71. Accordingly, the engagement state between the protrusion 71 and the cam teeth 61 of the cam portion 6 is released, and the protrusion 71 is rearward along the cam groove 62 of the cam portion 6 due to the rearward biasing by the elastic body 10. Move to. As the rotating member 7 moves rearward, the writing body 5 moves rearward and enters the pen tip immersion state. The guide protrusion 81b is engaged with the stepped portion 42 on the rear side of the cam portion 6, and the pen tip immersion state is maintained.

The thermochromic writing instrument 1 of the present embodiment accommodates thermochromic ink in a cursive body 5, and a pen tip 51 capable of ejecting the thermochromic ink is provided at the front end of the cursive body 5. The body 5 is accommodated in the shaft cylinder 2 so as to be movable in the front-rear direction, the knock member 8 is protruded rearward from the rear end hole 41 of the shaft cylinder 2, and the knock member 8 is pressed forward from the pen tip immersion state. Thus, the nib 51 is projected from the front end hole 31 of the shaft cylinder 2, and the nib 51 is pushed from the front end hole 31 of the shaft cylinder 2 by pressing the knock member 8 forward from the pen tip protruding state. The shaft cylinder 2 is provided with a retracting mechanism for bringing it into an immersion state. The retracting mechanism engages with the cam portion 6 provided on the inner surface of the shaft tube 2 and the rear end of the writing body 5. The rotating member 7 in contact with the rotating member 7 and the knock member engaged with the rotating member 7 And a resilient member 10 that is accommodated in the shaft cylinder 2 and biases the writing body 5 or the rotating member 7 rearward, and includes a clip 43 on the outer side wall of the shaft cylinder 2, and the knock member 8 is formed integrally from an elastic material, and a friction portion 9 capable of thermally discoloring the handwriting of the thermochromic ink by frictional heat generated by rubbing the handwriting of the thermochromic ink on the outer surface of the knock member 8. The knocking member 8 is inserted into the rear end hole 41 of the shaft tube 2 and engaged with the rotating member 7, and the inner tube portion 81. And an outer cylinder part 82 that covers the rear end of the shaft cylinder 2 and grips the outer surface of the outer cylinder part 82 of the knock member 8 when the friction operation is performed using the friction part 9. A gripping portion 82a is provided, and the outer cylinder portion 82 of the knock member 8 is always clicked. It is placed behind the 43.

The thermochromic writing instrument 1 of the present embodiment can grip the gripping portion 82a of the outer cylindrical portion 82 of the knock member 8 when the frictional operation is performed using the frictional portion 9 by the above-described configuration, and a stable frictional operation is achieved. It becomes possible. Furthermore, in the thermochromic writing instrument 1 according to the first invention, when the knock member 8 is pressed forward with one hand, the front end of the knock member 8 contacts the palm even if the hand is relatively small. And a smooth pressing operation is possible.

Further, in the thermochromic writing instrument 1 according to the present embodiment, the front end of the outer cylinder portion 82 is located behind the front end of the inner cylinder portion 81. Thereby, the inner cylinder part 81 and the rotating member 7 can be reliably brought into contact with each other, and the outer cylinder part 82 can be reliably arranged behind the clip 43. As a result, when a friction operation is performed using the friction portion 9, a stable friction operation can be surely obtained, and even when a knocking member 8 is pressed with one hand, even a relatively small hand is smooth. A pressing operation is reliably obtained.

DESCRIPTION OF SYMBOLS 1 Thermochromic writing instrument 2 Shaft cylinder 3 Front shaft 31 Front end hole 4 Rear shaft 41 Rear end hole 42 Step part 43 Clip 44 Cylindrical rear end part 5 Writing body 51 Pen tip 52 Ink receiving tube 6 Cam part 61 Cam tooth 62 Cam Groove 7 Rotating member 71 Projection 8 Knock member 81 Inner cylinder part 81a Cam tooth 81b Guide projection 82 Outer cylinder part 82a Gripping part 83 Connecting wall part 9 Friction part 10 Elastic body

Claims (2)

A thermochromic ink is accommodated inside the cursive body, a pen tip capable of ejecting the thermochromic ink is provided at the front end of the cursive body, and the cursive body is accommodated in the shaft cylinder so as to be movable in the front-rear direction. A knock member is protruded rearward from the rear end hole of the shaft cylinder, and the pen tip is protruded from the front end hole of the shaft cylinder by pressing the knock member forward from the pen tip immersion state. A cam portion provided on the inner surface of the shaft tube, the device including a retracting mechanism that pushes the knock member forward from the front end hole of the shaft tube to immerse the pen tip into the shaft tube. A rotating member that engages with the cam portion and contacts the rear end of the writing body, the knock member that engages with the rotating member, and the writing body or the rotating member that is accommodated in the shaft cylinder Consisting of a projectile that urges the A clip is provided on the outer surface of the side wall of the shaft tube, the knock member is formed integrally from an elastic material, and the thermochromic property is generated by frictional heat generated by rubbing the handwriting of the thermochromic ink on the outer surface of the knock member. A thermochromic writing instrument in which a friction part capable of thermal discoloration of ink handwriting is formed,
The knock member is inserted into the rear end hole of the shaft tube and engaged with the rotating member, and the outer tube is integrally connected to the inner tube portion and covers the rear end portion of the shaft tube A gripping portion that can be gripped when the frictional operation is performed using the frictional portion, and the outer cylindrical portion of the knocking member is always disposed at the rear of the clip. A thermochromic writing instrument characterized by that. The thermochromic writing instrument according to claim 1, wherein a front end of the outer cylinder portion is located behind a front end of the inner cylinder portion.
Knock material

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