JPH07195890A - Fluorescent writing material - Google Patents

Abstract

PURPOSE:To provide a writing material, by which writing images such as written graphics, characters and the like can be made visible and invisible any number of times. CONSTITUTION:A fluorescent pen 1 is equipped with a writing part 2 with a pen point 8, in which transparent fluorescent ink having the property for emitting visible light by being irradiated with ultraviolet rays or the like is infiltrated, a built-in UV lamp for emitting ultraviolet rays, a light emitting part 3, which radiates ultraviolet rays outside through a lens 32b, and a driving part, which is built in the light emitting part 3 so as to drive the UV lamp in order to emit ultraviolet rays. Thus, writing images such as written characters, graphics and the like can be made visible and invisible any number of times.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is to write with a transparent fluorescent ink to make a written image such as written characters and figures invisible in a normal state, and to write a ray of a predetermined wavelength (ultraviolet ray,
The present invention relates to a fluorescent writing instrument capable of visually recognizing a written image by irradiating infrared rays, visible light, etc.).

[0002]

2. Description of the Related Art Conventionally, for studying for an examination, quizzes, or preventing leakage of confidential information, characters and figures written using transparent ink are made invisible under normal conditions, and the written portion is traced with a predetermined ink. There is a writing tool that displays written images such as characters and figures.

When using such a writing instrument, first, a desired character, figure, etc. is written with a dedicated pen made of transparent ink. In this state, since the handwriting was done with the transparent ink, the handwritten image such as characters and figures cannot be visually recognized. Then, when viewing the written image, the written portion is traced or filled with another pen using a dedicated ink. Then, the characters, figures, etc. written with the transparent ink come up, and these can be visually recognized.

[0004]

However, in the above-mentioned writing instrument, since the above-mentioned dedicated ink for exposing is adhered to the paper surface or the like, the characters, figures, etc. made by the transparent ink once exposed are made invisible again. However, there is a problem in that the written image cannot be hidden and confirmed many times.

The present invention has been made in order to solve such a conventional problem, and provides a writing instrument capable of making a written image such as a written figure or a character visible and invisible as many times as possible. With the goal.

[0006]

The fluorescent writing instrument of the present invention comprises:
A writing part comprising a pen tip containing a transparent fluorescent ink having a property of emitting visible light of a second wavelength different from the first wavelength when irradiated with a light of the first wavelength such as ultraviolet rays. And a driving unit that drives the light emitting unit so as to emit the light beam of the first wavelength, such as an ultraviolet ray.

[0007]

In the writing instrument of the present invention as described above, when a desired character, figure or the like is written on the writing section, the character, figure or the like is invisible in a normal state because it is written with the transparent fluorescent ink. Then, driven by the driving unit, the light emitting unit emits a light ray of a first wavelength such as ultraviolet rays, and when this light ray is applied to the writing portion, the transparent fluorescent ink emits a visible light ray of the second wavelength. Writing images such as characters and figures can be visually recognized. Further, when the irradiation of the light rays by the light emitting unit is stopped, the transparent fluorescent ink stops the emission of the visible light rays, so that the written image becomes invisible again. Therefore, according to the writing instrument of the present invention, it is possible to make the written image visible and invisible as many times as possible.

[0008]

EXAMPLES An example of a fluorescent pen to which the present invention is applied will be described in detail below. FIG. 1 is a diagram showing an overview of the highlighter pen of this embodiment. The highlighter pen 1 mainly includes a writing section 2, a light emitting section 3, and a cap 4.

The writing portion 2 is a portion mainly related to writing with fluorescent ink, and a sectional view of the writing portion 2 taken along the line AA in FIG. 1 is shown in FIG. In FIGS. 1 and 2, 5
Is a cylindrical writing portion case made of resin, and is a threaded portion 5 at one end.
At a, the cap mounting portion 5b is screwed with the light emitting portion case 6, and the cap 4 is mounted on the other end, and the conical portion 5 has a substantially conical shape on the tip side of the cap mounting portion 5b.
c, a pen tip holding hole 5d that is a through hole that allows the inside and the outside of the writing case to pass through is formed at the tip of the conical portion 5c. A cylindrical metal nib holder 7 having a through hole 7a at the center is fixed to the pen tip holding hole 5d on the outer periphery thereof, and ink penetrates into the through hole 7a of the pen tip holder 7. A rod-shaped pen nib 8 made of a material such as felt having a hardness capable of withstanding writing pressure is inserted and fixed by exposing both ends through the through hole 7a. Further, in the writing part case 5, an ink tank 9 is housed in which an outer periphery is housed in a flexible film 9a and an ink accumulating member 9b made of a material such as felt capable of penetrating ink is housed. One end of the pen tip 8 is inserted into the ink tank 9, and the pen tip 8 is inserted from the ink accumulating member 9b of the ink tank 9.
The ink is supplied by the ink penetrating into the.

The ink contained in the ink tank 9 is a transparent fluorescent ink, and is an inorganic fluorescent pigment Zn.
It contains O: Zn and emits emerald green visible light having a wavelength of about 505 nm when irradiated with ultraviolet rays having a wavelength of about 365 nm. When such a UV ray is not received, visible light rays of all wavelengths can be transmitted, and thus the written and dried fluorescent transparent ink cannot be visually recognized.

On the other hand, the light emitting portion 3 is a portion for emitting the ultraviolet rays having a wavelength of about 365 nm, and the light emitting portion 3 shown in FIG.
A sectional view taken along line AA is shown in FIG. In FIGS. 1 and 3, reference numeral 6 denotes a cylindrical light emitting unit case made of resin, which is screwed to the screwing unit 6 of the writing unit case 5 at a screwing unit 6a at one end. As shown in FIG.
3, a lower substrate support protrusion 6b, an upper substrate support protrusion 6c, and a substrate locking protrusion 6d, which protrude leftward in FIG. 3, are provided in the substrate 20 inside the light emitting unit case 6. Is supported. That is, the substrate 20 has the lower end on the lower substrate support protrusion 6b,
One surface of the upper portion is supported by the upper substrate supporting protrusions 6c, and the substrate locking protrusions 6d penetrate through the locking holes 20a provided in the substrate 20, and the locking formed at the tips of the substrate locking protrusions 6d. It is fixed in the light emitting unit case 6 by being locked by the hook 6e. When removing the substrate 20 from the light emitting unit case 6, the substrate locking protrusion 6d is pushed downward in the drawing to unlock the locking hook 6e, and the upper portion of the substrate 20 is pushed leftward. Board locking protrusion 6
By removing d from the locking hole 20a, the substrate 20 can be pulled out upward.

The substrate 20 has a UV lamp connecting portion 2
2 and 22 are provided, are electrically connected to the connecting portions 23a and 23a provided at both ends of the cylindrical UV lamp 23, and fix the UV lamp 23.

The UV lamp 23 has a connecting portion 23 at both ends.
When a voltage having a predetermined value is applied to a and 23a in a predetermined procedure, it emits an ultraviolet ray having a wavelength near 365 nm that can cause the fluorescent transparent ink to emit light. And this UV is applied to the substrate 20.
Electrical components (not shown) forming a UV lamp driving circuit for causing the lamp 23 to emit light are attached. In addition, the substrate 20 has a reflection plate 24 made of a flat metal.
Is fixed to the surface of the substrate 20 facing the UV lamp via a spacer 27 with a screw 25 and a nut 26. The reflector 24 is for reflecting the light emitted by the UV lamp.

Further, battery connecting members 28 and 29 made of metal and having elasticity are fixed to the substrate 20, and a disk-shaped output voltage of 6 V is utilized between the battery connecting members 28 and 29 by utilizing the elasticity of both members. The battery 30 is retained. The battery connecting member 28 is
The conductive pattern formed on the substrate electrically connects to a UV lamp drive switch described later, and the battery connecting member 29 electrically connects to the UV lamp drive circuit by the conductive pattern formed on the substrate. There is. Both electrodes of the battery 30 are in electrical contact with the battery connecting members 28 and 29, and the electromotive force of the battery 30 is supplied to the UV lamp drive circuit.

The switch member 31 made of an elastic material such as rubber is sandwiched between the substrate 20 and the light emitting case 6. The pressing portion 31a of the switch member 31 is exposed to the outside of the light emitting unit case 6 through a switch hole 6f which is an opening formed in the light emitting case. A movable contact 31b made of conductive rubber is formed on the center of the switch member 31 on the side of the substrate 20 so as to face the substrate 20 with a predetermined gap. Moving contact 3 on substrate 20
Two contact patterns (not shown) made of a conductive material are formed in a portion facing 1b, and constitute the UV lamp drive switch together with the movable contact 31b. The two contact patterns are formed at a predetermined interval and are insulated from each other. One of the contact patterns is electrically connected to one electrode of the battery 30 through the battery connecting member 28 by the conductive pattern formed on the substrate 20, and the other of the contact patterns is formed on the substrate 20. It is electrically connected to the UV lamp driving circuit by another conductive pattern. When the pressing portion 31a is pressed to the left in FIG. 3, the switch member 31 elastically deforms, the movable contact 31b comes into contact with both contact patterns of the fixed contact, and the both contact patterns are moved. Make it conductive. When the contact patterns are made conductive, the output voltage of the battery 30 is applied to the UV lamp drive circuit, and the UV lamp drive circuit outputs UV light.
The lamp 23 is turned on and ultraviolet rays are emitted. When the pressing force applied to the pressing portion 31a of the switch member 31 disappears, the switch member 31 returns to its original shape, the movable contact 31b is separated from the fixed contact both contact patterns, and both contact patterns are insulated again. As a result, the UV lamp drive circuit turns off the UV lamp 23. Thus, the above UV
The lamp 23 is turned on and emits ultraviolet rays only while the pressing portion 31a of the switch member 31 is being pressed.

A screwing portion 32a formed on the lens member 32 is screwed into the screwing portion 6g at the upper end of the light emitting case 6. The lens member 32 has a pot shape, and the screw portion 32a is formed on the side wall portion of the pot, and the lens 32b is formed on the portion corresponding to the pot bottom (upper part in FIG. 3). The lens 32b is a highlighter pen. 1 is screwed into the light emitting unit case 6 so as to be located at the end opposite to the pen tip 8. The lens member 32 is made of a resin that can transmit only the ultraviolet rays having a wavelength near 365 nm emitted by the UV lamp 23, and the lens 32b is the UV lamp 23.
It is formed in a shape such that the above-mentioned ultraviolet rays emitted by are emitted to the outside of the fluorescent pen 1 at a predetermined angle.

Further, a reflecting member 33 made of resin is provided inside the light emitting case 6, and an edge 33a at the upper end thereof is provided with the upper end of the threaded portion 6g of the light emitting case 6 and the lens member 32.
It is sandwiched and fixed to a convex portion 32c formed so as to surround the inner wall thereof. The reflecting member 33 has a trumpet shape whose mouth widens toward the lens member 32 side, and a cutout portion 33b is provided on the substrate 20 side fixed in the light emitting unit case 6, and the cutout portion 33b is provided. The UV lamp 23 is housed inside via 33b. The inner surface of the lens member 32 is processed so as to have a mirror surface, and is formed in a shape that reflects the ultraviolet rays emitted by the UV lamp 23 together with the reflection plate 21 and irradiates the lens 32b. ing.

The cap 4 shown in FIG. 1 is mounted on the cap mounting portion 5b of the writing portion 5 so as to cover the pen tip 8 when the writing is not performed by the highlighter pen 11 to evaporate the transparent fluorescent ink. The purpose is to prevent drying and to protect the pen tip 8.

Next, the operation of the highlighter pen 1 of this embodiment will be described with reference to FIGS. 4 and 5. FIG. 4 is a diagram showing a state at the time of writing with the fluorescent pen 1, and reference numeral 40 in the figure is letters written with transparent fluorescent ink. In this way, when the highlighter pen 1 is held by a finger or the like (not shown) and the characters 40 are written on a paper or the like with the transparent fluorescent ink, the written characters 40 cannot be visually recognized at all.

FIG. 5 is a diagram showing a state when the fluorescent pen 1 irradiates ultraviolet rays, and as described above, the pressing portion 31a.
When is pressed, the UV lamp 23 emits ultraviolet rays, and the ultraviolet rays are directly or reflected by the reflection plate 21 and the reflection member 33, refracted at a predetermined angle by passing through the lens 32b, and emitted to the outside of the fluorescent pen 1 with a predetermined spread. It Pressing part 3
When the invisible character 40 written as described above is irradiated with the radiated ultraviolet rays while pressing 2B, the transparent fluorescent ink forming the character 40 emits the visible light of the emerald green, and as a result, , The character 40 can be visually recognized.

After that, the ultraviolet ray character 4 by the highlighter pen 1
When the irradiation for 0 is stopped, the character 40 becomes invisible again.

As described above, according to the highlighter pen of this embodiment, it is possible to write invisible characters and figures with the transparent fluorescent ink, and invisible characters and figures written with ultraviolet rays by the built-in UV lamp. If you illuminate the
The figures etc. are visible. After that, when the irradiation of ultraviolet rays is stopped, the characters, figures, etc. become invisible again. As described above, with the highlighter pen of this embodiment, it is possible to make written characters, figures, etc. visible or invisible as often as necessary. Further, since the transparent fluorescent ink itself emits visible light, the present fluorescent pen makes the characters, figures, etc. exposed by ultraviolet irradiation bright and vivid and easy to visually recognize.
Further, since the writing portion and the light emitting portion are integrated with each other in the present fluorescent pen, the content of the writing can be confirmed by irradiating with ultraviolet light immediately after writing without losing one of them.

The transparent fluorescent ink used in the present invention is not limited to the above, and the light rays to be irradiated are not limited to the above wavelengths as long as they match the properties of the fluorescent ink.

[0024]

The fluorescent writing instrument of the present invention is a transparent fluorescent material having a property of emitting visible light of a second wavelength different from the first wavelength when irradiated with a light of the first wavelength such as ultraviolet rays. A writing part that is capable of writing by a writing part having a pen tip containing ink, and is a part where the light beam of the first wavelength, such as ultraviolet rays, emitted by the light emitting part when driven by the driving part is written by the writing part. Since it is possible to irradiate the object, it is possible to visualize and invisible the written image such as written characters and figures as many times as necessary. In addition, since the fluorescent ink is used, the ink emits visible light, and thus the written handwritten image that is exposed is brighter, more vivid, and easier to see than a conventional writing instrument that can conceal the written handwritten image.

[Brief description of drawings]

FIG. 1 is a diagram showing an overview of a highlighter pen according to an embodiment of the present invention.

FIG. 2 is a diagram showing the inside of a writing unit 2.

FIG. 3 is a diagram showing the inside of a light emitting unit 3.

FIG. 4 is a diagram showing a state during writing with the highlighter pen 1.

FIG. 5 is a diagram showing a state when ultraviolet rays are irradiated by the fluorescent pen 1.

[Explanation of symbols]

 1 Highlighter 2 Writing part 3 Light emitting part 5 Writing part case 6 Light emitting part case 8 Nib 9 Ink tank 20 Substrate 21 Reflector 23 UV lamp 30 Battery 31 Switch member 31a Pressing part 32 Lens member 32b Lens 33 Reflecting member 40 Written Character

Claims (2)

[Claims] 1. Writing having a pen tip containing a transparent fluorescent ink having a property of emitting visible light of a second wavelength different from the first wavelength when irradiated with a light of the first wavelength. A fluorescent writing instrument comprising: a unit, a light emitting unit that emits a light beam of the first wavelength, and a drive unit that drives the light emitting unit to emit a light beam of the first wavelength. 2. The fluorescent writing instrument according to claim 1, wherein the fluorescent ink has a property of emitting visible light when irradiated with ultraviolet light, and the light emitting portion emits ultraviolet light.