JPH0732121Y2 - Drafting pen - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a pen that is a writing instrument, and more particularly to a drawing pen suitable for drawing thin lines such as drawings.

[Conventional technology]

Conventional pens include fountain pens, ballpoint pens, and the like. Among them, what is called a styrographic pen, which is a type of fountain pens, is widely used for drawing thin lines such as drawings. This stylographic pen has a needle at the tip of a shaft with a built-in weight, and when the pen tip is down, the weight of the weight stops the flow of ink from above, and when the pen tip is pressed against the paper surface, The needle lifts the weight to allow the ink to flow, and the ink flows into the pen tip of the capillary to draw a line.It is relatively easy to form the needle described in the above structure to be thin. Therefore, there is an advantage that it can be suitably used as a writing instrument for drawing thin lines.

On the other hand, the above ballpoint pen has a simpler structure than a fountain pen,
Due to advantages such as suitability for mass production, disposable types that are inexpensive to manufacture are widely used. Further, the ball-point pen is composed of a ball at the tip, a tip fitting called a socket, an oil-based ink, a shaft and a cap for wrapping them, and the ball is a hard ball made of high-carbon chrome steel with extremely high accuracy. The socket that encloses the sphere is also precisely processed, and the inner seat has several grooves that allow the ink to flow, and the capillary ink causes the oil-based ink to flow into the gap between the socket and the sphere, At the time of writing, the ball in the socket rotates to guide ink continuously. On the other hand, the ballpoint pen has a diameter of 0.5 ~
It is 0.6 mm.

[Problems to be solved by the device]

The stylographic pen described in the above conventional technique is widely used as a drawing pen, but as the thickness of the needle is reduced to be applied to thin line drawing, the strength of the needle itself weakens and the needle easily bends. There is. Also,
As the capillary and needle of the pen tip become thinner, the ink that accumulates in the gap between the two becomes easier to dry and form solid matter, which may interfere with the ejection of the ink or make it unusable during the next use. There are drawbacks such as.

On the other hand, some ball-point pens described in the related art are not suitable as writing instruments for drawing thin lines because their pen tips are spherical.

Therefore, the present invention has been made in view of such drawbacks of the conventional technology, and its purpose is to:
It is an object of the present invention to provide a pen which is suitable for mass production, can be manufactured at low cost, and is suitable for thin line drawing because of its extremely simple structure.

[Means for Solving the Problems]

In order to achieve the above-mentioned object, the drawing pen according to the present invention has a pen core having a pen tip socket at one end, and a bottom filled with ink, and a core filled with ink. Further, in a pen in which the tip of the pen tip socket projects from one end of the pen shaft and the other end is sealed by a cap, the pen tip socket has a cross section at the base end portion of the pen tip socket. While it is circular, the thickness is gradually reduced in the vertical direction toward the tip of the protrusion to form a flat shape, and a disk-shaped object that is roughly abacus ball-shaped is slightly seen from the tip of the protrusion on the tip of the pen tip socket. The gist of the present invention is to form an embedded space to be embedded and sandwiched in such a state that the disk-shaped object is embedded and sandwiched in the embedded space.

Further, in order to perceive the remaining amount of the ink filled in the core, the core and the pen shaft may be formed of a transparent body.

Further, in order to show the correct front and back positions of the substantially disc-shaped object embedded and attached to the tip of the pen tip socket, a display mark or the like is provided at the opposite position on the side surface of the pen shaft so that the angle can be adjusted. Good.

[Action]

The core of the drafting pen according to the present invention is filled with the ink for drafting, and the ink flows into the gap between the pen tip socket and the substantially disk-shaped object due to the capillary phenomenon, and when writing, the above pen tip socket The substantially disk-shaped object, which is substantially abacus ball-shaped and is embedded and sandwiched at the protruding tip end of, rotates and acts to continuously guide the ink.

Further, depending on the drafting pen according to the present invention, the outer peripheral edge of the substantially disk-shaped substantially disk-shaped object which is embedded and sandwiched in the protruding tip portion of the pen tip socket presses the paper surface to draw a line. Therefore, compared with the case of pressing the paper surface with a spherical object such as a ball-point pen, the contact state with the paper surface can be improved from the surface contact to the linear contact, and it works so as to write particularly finely.

〔Example〕

A preferred embodiment of a drafting pen according to the present invention will be described below with reference to the drawings.

First, FIG. 1 is a plan view of a drafting pen according to the present invention, and FIG. 2 is a front view of the drafting pen according to the present invention.
3 is an enlarged view of the nib portion in FIG. 1, and FIG. 4 is an enlarged view of the nib portion in FIG. Here, in the drawing pen according to the present invention, the pen shaft 9 is separated into the pen shaft main body 2 and the taper 7 in the drawings, but it is needless to say that the pen shaft 9 includes the taper 7 portion. Even if it is integrally molded, it does not hinder the invention. Therefore, as shown in the drawing, in the drafting pen 1 according to the present invention, the pen shaft 9 is formed by the pen shaft body 2 and the taper 7, and the pen tip socket 4 projects from the taper 7, while the pen The other end of the shaft body 2 is sealed by a cap 6. Further, as shown in FIGS. 3 and 4, a disk-shaped object 5 is embedded and attached to the tip of the pen tip socket 4 according to the present invention.
Furthermore, the black-painted triangular mark 8 shown in FIG. 1 and FIG.
Is a mark for indicating the correct front and back positions of the disk-shaped object 5, and is displayed at a facing position on the side surface of the pen shaft 9.

Next, FIG. 5 is a front view of the taper 7, FIG. 6 is a sectional view taken along line AA of FIG. 5, FIG. 7 is a front view of the cap 6, and FIG. 8 is also taken along BB of FIG. Sectional view, and further Fig. 9 shows the second
It is CC sectional drawing in the figure. As shown in the figure, a pen shaft 9 formed by a pen shaft body 2 and a taper 7 is internally provided with a core 3, and one end of the core 3 has a disc-shaped object 5 embedded therein. The bottom of the socket 4 is inserted.

Subsequently, FIG. 10 is a partial sectional view taken along the line DD of FIG. 3, and FIG. 11 is a partial sectional view taken along the line EE of FIG. As shown in the drawing, the pen tip socket 4 has a circular cross section at the base end portion thereof, and the thickness in the vertical direction is gradually reduced toward the projecting tip direction so as to have a flat shape, and the projecting tip portion of the pen tip socket 4 is formed. An embedded space is formed in which the disk-shaped object 5 having a substantially abacus bead shape is embedded and sandwiched in a state of being slightly seen from the protruding tip. Further, the disk-shaped material 5 is embedded and sandwiched in the embedding space. The drawing ink filled in the core 3 is caused by the capillary phenomenon to cause the nib socket 4 and the disk-shaped object 5
When the ink flows into the gap and the line is drawn on the paper surface, the disk-like object 5 rotates to continuously guide the ink.

[Effect of device]

Since the drafting pen according to the present invention has the above-described configuration, it has the following effects.

According to the drafting pen according to the present invention, the pen tip strength can be increased and clogging due to ink drying can be alleviated as compared with conventional drafting pens such as styrographic pens, but with an extremely simple structure. Therefore, there is an effect that a product can be provided at a low price, suitable for mass production.

Further, according to the drafting pen of the present invention, a disk-shaped object having a substantially abacus bead shape is embedded and sandwiched at the protruding tip portion of the pen tip socket, and the disk-shaped object rotates and the outer peripheral edge thereof. Since the thin line is drawn by, there is an effect that the writing stroke is smooth and the fine line can be drawn with higher accuracy.

[Brief description of drawings]

FIG. 1 is a plan view of a drafting pen according to the present invention. FIG. 2 ... Front view of the drafting pen according to the present invention. FIG. 3 ... An enlarged view of the pen tip portion in FIG. FIG. 4 ... An enlarged view of the pen tip portion in FIG. FIG. 5 ... A front view of a taper according to the present invention. FIG. 6 ... AA sectional view of FIG. FIG. 7: Front view of the cap according to the present invention. FIG. 8 ... BB sectional view of FIG. FIG. 9 ... CC partial sectional view of FIG. FIG. 10 ... DD partial sectional view in FIG. FIG. 11 ... Partial sectional view taken along the line EE in FIG. 1 ... Drafting pen according to the present invention, 2 ... Pen shaft, 3 ...
Core, 4 ... Pen tip socket, 5 ... Disc-shaped object, 6 ...
Cap, 7 ... Taper, 8 ... Triangle mark

Claims (2)

[Scope of utility model registration request] 1. A bottom end of a pen tip socket is inserted into one end and an ink-filled core is installed inside a pen shaft having openings at both ends, and the pen tip is further extended from one end of the pen shaft. In a pen in which the tip of the socket projects while the other end is sealed by a cap, the pen tip socket has a circular cross section at the proximal end portion of the pen tip socket, while the pen tip socket extends vertically in the direction of the projecting tip. The thickness is gradually reduced to a flat shape, and an embedding space is formed at the protruding tip of the pen tip socket in which a disc-shaped object, which is roughly an abacus ball shape, is embedded and sandwiched with the disk-shaped object slightly removed from the protruding tip. The drawing pen is characterized in that the disk-shaped object is embedded and sandwiched in the embedding space. 2. The drawing pen according to claim 1, wherein the core and the pen shaft are formed of a transparent body.