JP3173390U - Thermochromic writing instrument - Google Patents

Abstract

Provided is a thermochromic writing instrument that can be easily provided with various heating tools such as a friction body and an electric heating tool and that can be used freely.
A thermochromic ink is accommodated in a cursive body. A pen tip 51 capable of discharging thermochromic ink is provided at the front end of the cursive. The cursive body is accommodated in the shaft cylinder 2 so as to be movable in the front-rear direction. The pen point 51 of the cursive body is configured to be able to appear and disappear from the front end hole 31 of the shaft cylinder 2. At the rear end of the shaft tube 2, a heating tool 6 for thermally changing the handwriting of the thermochromic ink is detachably provided. The heating tool 6 includes a heating unit 61 that comes into contact with the thermochromic handwriting, and a gripping unit 62 that is gripped when used separately from the shaft tube 2. A mounting hole 41 is provided at the rear end of the shaft tube 2 to allow the heating tool 6 to be attached and detached. In a state where the heating tool 6 is attached to the attachment hole 41, the heating part 61 protrudes rearward from the rear end of the shaft tube 2, and the grip part 62 is accommodated in the attachment hole 41.

Description

The present invention relates to a thermochromic writing instrument. In detail, it is related with the thermochromic writing instrument which incorporated the thermochromic ink.

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

In the conventional thermochromic writing instrument, it is difficult to provide various heating tools (for example, a large friction body or a large heating tool such as an electric heating tool) at the top of the cap or the rear end of the shaft cylinder.

The present invention solves the above-described conventional problems, and can easily provide various heating tools such as a friction body and an energization heating tool, and can also be used freely. It is intended to provide sex writing instruments. In the present invention, the front indicates the pen tip side, and the rear indicates the opposite side.

The first device of the present application contains thermochromic ink in a cursive body 5, a pen tip 51 capable of discharging the thermochromic ink is provided at the front end of the cursive body 5, and the cursive body 5 is pivoted. The pendant 51 of the writing body 5 is accommodated in the cylinder 2 so as to be movable in the front-rear direction, and can be projected and retracted from the front end hole 31 of the shaft cylinder 2. It is a requirement that the heating tool 6 for thermally changing the handwriting is detachably provided.

The thermochromic writing instrument 1 of the first device is configured to heat the rear end of the shaft cylinder 2 of the writing instrument (ie, the retractable writing instrument) in which the pen tip 51 of the writing body 5 is configured to be able to protrude from the front end hole 31 of the shaft cylinder 2. Since the tool 6 is detachably provided, the outer diameter of the rear end portion of the shaft tube 2 can be freely set. Therefore, various heating tools 6 such as a friction body and an electric heating tool can be easily provided. Furthermore, the thermochromic writing instrument 1 of the first invention can be used by separating the heating tool 6 from the shaft cylinder 2 and holding the separated heating tool 6 so that the heating tool 6 can be used freely. .

The second invention of the present application is that, in the thermochromic writing instrument 1 of the first invention, the heating tool 6 is used separately from the heating unit 61 that contacts the thermochromic handwriting and the shaft tube 2. In the state where the heating tool 6 is detachably provided at the rear end of the shaft tube 2, and the heating tool 6 is attached to the mounting hole 41, the heating tool 6 is attached to the heating tube 6. It is a requirement that the heating part 61 of the tool 6 protrudes rearward from the rear end of the shaft cylinder 2 and that the holding part 62 of the heating tool 6 is accommodated in the mounting hole 41.

The thermochromic writing instrument 1 of the second device is free of the heating tool 6 in either the state where the heating tool 6 is attached to the rear end of the shaft tube 2 or the state where the heating tool 6 is separated from the shaft tube 2. Can be used.

According to a third device of the present application, in the thermochromic writing instrument 1 of the second device, a plurality of the writing bodies 5 are accommodated in the axial tube 2 so as to be movable in the front-rear direction, and each of the writing bodies 5 is stored. It is a requirement that the nib 51 is configured to be able to appear and retract alternatively from the front end hole 31 of the shaft cylinder 2.

Since the thermochromic writing instrument 1 of the third invention is a multi-core type retractable writing instrument, the outer diameter of the shaft tube 2 can be made sufficiently large, and as a result, the inner diameter of the mounting hole 41 is formed larger. Therefore, various heating tools 6 such as a friction body and an electric heating tool can be easily provided.

In the present invention, examples of the heating tool 6 include a friction body or an energization heating tool. Examples of the energization heating tool include those using an energization heating element or those that actuate a friction body by electric drive.

The shaft cylinder 2 is provided with a retracting mechanism for moving each writing body in the front-rear direction by operating the operation unit and retracting the pen tip from the front end hole. The operation portion is provided on a rear end of the shaft tube or a side wall of the shaft tube. The operation unit can be operated by the gripped hand while holding the thermochromic writing instrument with one hand.

The intruding mechanism is, for example, a pen nib immersive state by projecting the operation part rearward from the rear end of the shaft cylinder and pressing the operation part forward against the back bias of the writing body. The pen is protruded from the pen tip (so-called rear-end knock type), the operating part protrudes radially outward from the axial tube side wall, and the operating part is pushed forward against the back bias of the writing body A configuration in which the pen tip immerses into a pen tip protruding state (so-called side slide type) by operating, the operation portion protrudes radially outward from the axial tube side wall, and the operation portion is arranged in the radial direction of the writing body. A configuration that changes the pen tip into a pen tip protruding state (so-called side knocked type) by pushing inward, or the operation part provided at the rear of the shaft tube rotates with respect to the front of the shaft tube By making the pen tip appear and disappear Expression), and the like.

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.

According to the thermochromic writing instrument of the present invention, various heating tools can be easily provided, and the heating tool can be used freely.

An embodiment of a thermochromic writing instrument 1 of the present invention is shown in FIGS.
The thermochromic writing instrument 1 of the present embodiment includes a shaft tube 2, a plurality of writing bodies 5 accommodated in the shaft tube 2, and a heating tool 6 that is detachably attached to the rear end of the shaft tube 2. It consists of.

The shaft cylinder 2 includes a front shaft 3 made of a tapered cylindrical body and a cylindrical rear shaft 4 attached to the rear end portion of the front shaft 3 by screwing or fitting.

At the front end of the front shaft 3, a front end hole 31 through which the pen tip 51 of the writing body 5 can protrude and retract is provided in the axial direction. The outer peripheral surface of the front shaft 3 serves as a grip portion during writing.

A mounting hole 41 that opens rearward is provided at the rear end of the rear shaft 4. The heating tool 6 is detachably attached to the attachment hole 41 by fitting or screwing. A clip 42 is provided on the side wall of the rear shaft 4.

Further, the outer diameter of the rear portion of the rear shaft 4 is formed larger than the outer diameter of the front shaft 3. Thereby, the attachment of the heating tool 6 becomes easier. Specifically, the outer diameter of the rear shaft 4 is set in a range of 15 mm to 20 mm.

Inside the rear shaft 4, each writing body 5 is moved in the front-rear direction by rotating the rear shaft 4 (that is, the operation unit) with respect to the front shaft 3, and each pen tip 51 is alternatively selected from the front end hole 31. A haunting mechanism for haunting is provided. The retracting mechanism is connected to the rear end portion of the front shaft 3 by screwing or fitting. In addition, in this invention, in addition to this, it is also possible to employ a retracting mechanism such as a rear end knock type, a side knock type, or a side slide type.

-Cursive body Each of the cursive bodies 5 is a ballpoint pen refill, and includes a ballpoint pen tip (pen point 51) in which a ball is rotatably held at the front end, the ballpoint pen tip provided at the front end, and a rear end opened. And an ink containing tube 52. Inside the ink storage tube 52, thermochromic ink made of an aqueous gel having shear thinning viscosity is stored. The trailing end of the thermochromic ink in the ink containing tube 52 is filled with a follower made of a high-viscosity fluid that advances as the ink is consumed.

The thermochromic ink exhibits, for example, black, blue, red, yellow, green, orange, purple, amber, pink, light blue and the like in a colored state, and is colorless in a decolored state. That is, the handwriting by the thermochromic ink is thermally discolored by the contact of the heating unit 61 of the heating tool 6 and becomes a decolored state.

-Heating tool The said heating tool 6 consists of a heating part 61 and the cylindrical main body provided with this heating part 61 in the front end. A grip portion 62 is formed on the outer surface of the main body. On the outer surface of the main body on the heating unit 61 side, a flange portion 63 is provided so as to protrude circumferentially. Moreover, the cap 7 which covers the heating part 61 is provided in the outer surface of the main body from the flange part 63 side so as to be detachable.

The heating unit 61 is a part that comes into contact with the thermochromic handwriting to thermally discolor the handwriting. The grip portion 62 is a portion that is gripped by hand when used separately from the shaft tube 2. The grip portion 62 is accommodated by being inserted into the mounting hole 41 of the rear shaft 4. The flange 63 is brought into contact with the rear end of the rear shaft 4 when the heating tool 6 is mounted in the mounting hole 41 of the rear shaft 4. In a state where the grip portion 62 of the heating portion 61 is attached to the attachment hole 41 of the rear shaft 4, the heating portion 61 protrudes rearward from the rear end of the rear shaft 4.

As the heating tool 6, one of the following types is adopted.
a. A heating tool in which the heating unit 61 is formed of a friction body (for example, an elastic body), and the thermochromic handwriting is thermally discolored by frictional heat generated when the heating unit 61 rubs the writing surface. B. Energization heating comprising a power supply battery, an energization heating element (for example, a resistance heating element such as a ceramic heater, nichrome wire, thermistor, etc.) that generates heat when energized by the power supply battery, and a heating unit 61 heated by the energization heating element C. A power source battery, a motor that is rotated by energization of the power source battery, and a heating unit 61 that is a friction body (for example, an elastic body) that is rotated by the rotation of the motor, and the heating unit 61 rubs the writing surface. Energizing heating tool that discolors thermochromic handwriting with frictional heat

As shown in FIG. 1, the thermochromic writing instrument 1 of the present embodiment is such that the heating unit 61 is more than the rear end of the shaft tube 2 when the heating tool 6 is mounted in the mounting hole 41 at the rear end of the shaft tube 2. It protrudes backward. Therefore, the heating tool 6 can be used with the heating tool 6 attached to the rear end of the shaft tube 2.

As shown in FIG. 3, the thermochromic writing instrument 1 according to the present embodiment removes the heating tool 6 from the shaft cylinder 2 (writing tool main body) in a state where the heating tool 6 is detached (separated) from the shaft cylinder 2. Can be used independently, expanding the range of free usage for users.

It is a principal part longitudinal cross-sectional view of embodiment of this invention. It is a figure which shows the isolation | separation state of the heating tool and shaft cylinder of FIG. It is an AA line figure of FIG.

DESCRIPTION OF SYMBOLS 1 Thermochromic writing instrument 2 Shaft cylinder 3 Front shaft 31 Front end hole 4 Rear shaft 41 Mounting hole 42 Clip 5 Writing body 51 Pen tip 52 Ink storage tube 6 Heating tool 61 Heating part 62 Gripping part 63 collar part 7 Cap

Claims (3)

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. The pen tip of the writing body is configured to be able to protrude and retract from a front end hole of a shaft cylinder, and a heating tool that thermally changes the handwriting of the thermochromic ink is provided detachably at the rear end of the shaft cylinder. A thermochromic writing instrument. The heating tool includes a heating part that contacts a thermochromic handwriting, and a gripping part that is gripped when used separately from the shaft tube, and the heating tool is detachable at a rear end of the shaft tube. In a state where the mounting hole is provided, and the heating tool is mounted in the mounting hole, the heating part of the heating tool protrudes rearward from the rear end of the shaft tube, and the gripping part of the heating tool is accommodated in the mounting hole. The thermochromic writing instrument according to claim 1. The plurality of writing bodies are accommodated in the shaft cylinder so as to be movable in the front-rear direction, and each pen tip of the writing body is configured to be able to protrude and retract alternatively from a front end hole of the shaft cylinder. Thermochromic writing instrument.

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