JP2547612Y2 - Writing implement - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a writing instrument, and more particularly to a writing instrument capable of changing the thickness of a line to be drawn.

[0002]

2. Description of the Related Art Pencils, fountain pens, felt-tip pens and other conventional writing instruments have a substantially constant line thickness that can be drawn with a single writing instrument.

[0003]

Therefore, when it is desired to draw characters, figures, etc. having different thicknesses, it is necessary to change the thickness of the writing implement, which is complicated.

The present invention has been made in view of the above circumstances, and it is an object of the present invention to provide a writing instrument which can draw characters, figures, and the like having different thicknesses with a single writing instrument.

[0005]

According to the present invention, there is provided a writing instrument for solving the above-mentioned problems, which controls an ink storage section inside a shaft, an ink jet head supplied with ink from the ink storage section, and the ink jet head. A control circuit is provided, and a nozzle of the ink jet head is made to face a writing tip.

According to a second aspect of the present invention, there is provided a discharge amount adjusting means for increasing or decreasing the discharge amount of the ink from the ink jet head.

[0007]

In the above construction, when the writing tip runs on the paper, ink is ejected from the nozzle of the ink jet head facing the writing tip and a line is drawn. By adjusting the ink ejection amount of the inkjet head, a line having a desired thickness can be drawn.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIGS. FIG. 1 shows a cross section of the writing instrument 1, and FIG. 2 shows a block diagram of the electrical configuration. Inside the shaft body 2 of the writing instrument 1, an ink storage unit 3, an ink jet head 4 supplied with ink from the ink storage unit 3, a control circuit 5 for controlling the ink jet head 4, a power source 6 such as a battery, etc.
Is housed. Further, a cylindrical writing tip 7 is slidably provided in the opening at the tip of the shaft 2, and the nozzle 4 a of the inkjet head 4 faces the exit of the writing tip 7. A spring 8 for urging the writing tip 7 downward and a contact sensor 9 for detecting when the writing tip 7 is pressed against the paper and rises relatively to the shaft body 2 are provided. A mode switch 1 for selecting between a thicker mode and a thinner mode, that is, for selecting the size of the amount of ink ejected from the inkjet head 4.
0 is provided as a discharge amount adjusting means. The structure of the ink jet head 4 may be a pressure control method using a piezo element, an electrostatic suction method, an electrothermal conversion method using the generation of bubbles by heating, or any other method. In short, any mechanism that ejects ink droplets from the nozzles and directly adheres to the paper may be used.

When the contact sensor 9 is turned on, the control circuit 5 drives the ink jet head 4 to discharge ink from the nozzles 4a, and increases or decreases the amount of discharged ink according to the state of the mode switch 10. Let it.

Next, the operation will be described. When the writing tip 7 is brought into contact with the paper by holding the shaft 2 of the writing instrument 1 with the hand, the writing tip 7 rises relatively to the shaft 2 and the contact sensor 9 is turned on to control The circuit 5 sends a control signal corresponding to the state of the mode switch 10 to the inkjet head 4 to cause the nozzle 4a to eject ink. Therefore, when the writing tip 7 is moved while being in contact with the paper, ink droplets are continuously ejected from the nozzles 4a and a line is drawn. And the control circuit 5
When the mode switch 10 is set to the thick mode, the amount of ink ejected from the inkjet head 4 is increased, and a thick line is drawn. Note that the cycle in which ink droplets are ejected is sufficiently short, so there is no problem in drawing continuous lines.

The ink jet head 4 is not limited to one having one nozzle, but may have a structure having a plurality of nozzles. In the case of having one nozzle, the amount of ink ejected from the nozzle itself is increased or decreased. In the case of having a plurality of nozzles, the thickness of the drawn line is changed by controlling the number of opening and closing of the nozzle.

The writing tip 7 can be integrated with the shaft 2. In that case, the inkjet head 4
It is necessary to provide another means for giving an instruction as to whether or not to drive the control circuit 5 to the control circuit 5. For example, a drawing switch may be provided, and the inkjet head may be driven in a state where the drawing switch is turned on.

The ink storage section 3 may be of a cartridge type, that is, a structure that can be attached to and detached from the ink jet head 4 and can be taken out from the shaft 2, or a fixed type that can supply ink from outside. Good.

Further, a volume may be provided in place of the mode switch 10 as a discharge amount adjusting means to continuously increase or decrease the ink discharge amount.

[0015]

According to the present invention, the ink jet head ejects ink to draw a line.
It has become possible to draw characters, figures, and the like having a desired thickness with a writing instrument of a book. Thereby, the expressive power of the handwritten document can be easily increased. In addition, since the drawing is performed by ejecting ink droplets, clear drawing can be performed even when the recording portion (paper or the like) has a rough surface.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a writing instrument showing one embodiment of the present invention.

FIG. 2 is a block diagram showing an electrical configuration of the writing instrument.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Writing implement 2 Shaft 3 Ink storage part 4 Ink jet head 5 Control circuit 7 Writing tip 9 Contact sensor 10 Mode switch (ejection amount adjusting means)

Claims (1)

(57) [Scope of request for utility model registration] And 1. A ink reservoir, ink is supplied from the ink reservoir, ink is ejected from the tip of the shaft Roh
An inkjet head having a nozzle, the inkjet <br/> Tsu and <br/> control circuit for controlling the increase and decrease of the amount of ink discharged from the city of nozzles, the amount of ink in accordance with the thickness of the lines to be printed
Discharge amount adjusting means for instructing the control circuit to increase or decrease
Writing instruments, characterized in that that.