JPH0617578Y2 - Shaft for writing instruments - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to a transparent barrel for a writing instrument.

[Prior art and its problems]

The barrel of the writing instrument is formed of metal or synthetic resin into a tubular shape, but if this barrel is molded of transparent synthetic resin, the mechanism inside the barrel can be seen and the writing instrument is very interesting. Can be In particular, in the liquid writing instrument in which the water-based ink is directly filled in the barrel, it is convenient to make the barrel transparent so that the remaining amount of ink can be visually confirmed.
By the way, the transparent barrel has a smooth surface formed of, for example, a transparent acrylic resin, but since the resin is hard,
When writing, the fingertips are slippery, making it difficult to write, and the tactile feel is unfavorable.

[Purpose of device]

Therefore, an object of the present invention is to provide a barrel for a writing instrument, which is transparent and can easily confirm, for example, the remaining amount of ink, has a good tactile feel, and is easy to write.

[Constitution of the device and its action]

The writing instrument barrel according to the present invention is characterized in that a thin layer of transparent silicone rubber is coated on the outer surface of a barrel formed of a transparent synthetic resin.

That is, since the thin layer of transparent silicone rubber is rich in elasticity, the tactile sensation is good, and since the thin layer is deformed by the gripping force of the fingertip during writing, the fingertip does not slip and writing is easy. And
Since both the base cylinder and the thin film coated on the surface of the cylinder are transparent, for example, in the case of a liquid writing instrument, the amount of ink remaining in the shaft cylinder can be easily checked, and the writing instrument can be rich in interest. .

〔Example〕

The present invention will be described in detail below with reference to the embodiments shown in the drawings.

FIG. 1 shows a liquid writing instrument in which a water-based ink is directly filled in a shaft cylinder that also serves as an ink cylinder. In FIG. 1, the transparent barrel 1 is a double-layer structure in which the outer surface of a transparent barrel 11 made of acrylic resin is covered with a thin layer 12 of transparent silicon rubber having a thickness of, for example, about 1 to 3 mm. It is structured. Thin 12
In order to cover the above, for example, the cylindrical body 11 may be inserted in a mold and the liquid silicon may be injection-molded to easily cover. A front opening 2 is liquid-tightly fitted into the front end opening of the shaft cylinder 1, and a pen body 3 is attached to the front opening 2. The pen body 3 is a marker made of plastic having open cells, but it may be a ballpoint pen tip. A tail plug 6 is fitted to the rear end opening of the barrel 1 so as to allow ventilation, and a slide plug 4 is slidably arranged in the barrel 1. An ink chamber 5 is provided between the slide stopper 4 and the pen body 3, and the water chamber ink is filled in the ink chamber 5.

When the shaft cylinder 1 is gripped and written, ink is consumed from the pen body 3, and the slide plug 4 slides forward by the amount of ink consumed. That is, since the ink in the ink chamber 5 can be written without being replaced with air, it is possible to prevent the ink from dropping due to the expansion of the air in the ink chamber 5. At this time, since the barrel 1 is transparent, the remaining amount of ink can be accurately confirmed. Since the outer surface of the cylindrical body 11 of the barrel 1 is covered with the thin layer 12 of transparent elastic silicone rubber, the thin layer 12 is appropriately deformed when grasped with a fingertip. Therefore, it has the advantage that the fingertips do not slip and it is easy to write, and the tactile feel is extremely good. Further, since the shaft cylinder 1 has a double structure, it has an advantage of producing a high-class feeling.

[Effect of device]

As described above, the writing instrument barrel according to the present invention is transparent and has a thin layer of transparent silicone rubber coated on the outer surface of the barrel formed of a transparent synthetic resin. It is possible to obtain a barrel for a writing instrument which has a good tactile sensation and is easy to write.

[Brief description of drawings]

 FIG. 1 is a sectional view of an embodiment of the present invention. 1 ... Shaft cylinder, 11 ... Cylindrical body, 12 ... Thin layer 2 ... Tip port, 3 ... Pen body, 4 ... Slide stopper 5 ... Ink chamber, 6 ... Tail stopper

Claims (1)

[Scope of utility model registration request] 1. A barrel for a writing instrument, characterized in that a thin layer of transparent silicone rubber is coated on the outer surface of a barrel molded of transparent synthetic resin.