JPH0222301Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to anti-slip writing instruments.

Various types of anti-slip devices have been known in the past, which are placed on the grip of writing instruments such as sharp pencils, ballpoint pens, and felt-tip pens, in order to prevent the writing instrument from rotating during use and to improve the feeling of grip. Among these, a type that is made of an elastic material such as rubber and has a cylindrical anti-slip surface with a rough surface fitted into the grip of the writing instrument is widely used. However, as mentioned above, even if the anti-slip device is fixed to the writing instrument by adhesive or the like, the attached state may shift or rotate as the writing instrument is used. From the user's point of view, even a slight misalignment will impair the feeling of writing, and the user will have to adjust the installation condition of the non-slip every time, and may even remove it because it interferes with writing. Ta.

Therefore, in order to improve the above-mentioned problems, the present invention is designed to improve the method of attaching the non-slip and the shape of the non-slip, thereby preventing the non-slip from slipping during use and improving the writing feel.

Hereinafter, the present invention will be described in detail based on an embodiment adopted as a sharp pencil as a writing instrument, as shown in the accompanying drawings.

In FIGS. 1 and 2, reference numeral 1 indicates resin;
It is a central shaft made of metal, and inside this central shaft 1,
A core tank 5 to which a chuck 3 into which the chuck ring 2 is externally fitted is connected via a relay member 4 is biased rearward by an elastic member 6 such as a sling, and is arranged so as to press the chuck ring 2 against the front end of the center shaft 1. has been done. Incidentally, a notch member projecting from the shaft is connected to the core tank 5 (not shown). Reference numeral 7 denotes a tip body screwed onto the tip of the center shaft 1, and this tip body 7 includes a core protection tube 8, a core detent 9 that imparts slight elasticity to the core, and a stepped portion 10 that prevents the chuck ring 2 from moving forward. Be prepared. Reference numeral 11 denotes an outer shaft having holes 14 of the same number and substantially the same shape as the protrusions 13 of the anti-slip 12, which will be described later. In the illustrated example, this outer shaft 11 is fixed to the center shaft 1 via a connecting ring 11a. However, a stepped portion may be provided on the front outer surface of the inner shaft 1, and the outer shaft 11 may be fixed there. Reference numeral 12 denotes an elastic cylindrical anti-slip made of rubber, soft resin, urethane, etc., and this anti-slip 12 has an appropriate number of longitudinal protrusions 13 (six in the figure) on its outer surface. , the protrusion 13 is exposed from the hole 14 of the outer shaft 11, and more preferably the upper surface thereof is slightly protruded from the outer surface of the outer shaft 11,
Further, it is disposed in pressure contact between the inner shaft 1 and the outer shaft 11. In the illustrated example, the protrusion 13 of the anti-slip 12 and the hole 14 of the outer shaft 11 are formed in the longitudinal direction, but the protrusion 13 and the hole 14 are formed in the longitudinal direction.
They may be tilted in the direction as shown in Figure 3, or may be staggered in the circumferential direction as shown in Figure 4, and various modifications are possible, such as increasing or decreasing their number, or making their shape circular or square. be.

As described above, the present invention has a cylindrical anti-slip 12.
A protrusion 13 is provided on the outer surface of the outer shaft 11 , and the protrusion 13 is exposed through the hole 14 of the outer shaft 11 . Since it is fixed, it is anti-slip 1
An excellent writing feeling can be maintained without causing problems such as deviating or rotating the mounting state of the item 2 during use, which impedes writing or impairs the writing feeling.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention; Fig. 1 is a longitudinal sectional view, Fig. 2 is a perspective view of the anti-slip and main parts of the outer shaft, and Figs. 3 and 4 show other embodiments. FIG. 3 is a perspective view of main parts. 1... Central shaft, 11... Outer shaft, 12... Anti-slip, 13... Projection, 14... Hole.

Claims (1)

[Scope of utility model registration request] The non-slip device comprises a cylindrical non-slip having an appropriate number of ridges on its outer surface, an outer shaft having a hole of the same shape as the ridges of the non-slip, and a center shaft inside the outer shaft. The protrusion is exposed from the hole of the outer shaft, and the anti-slip is placed in pressure contact between the center shaft and the outer shaft,
A non-slip writing instrument with a fixed inner and outer shaft.