JPH0226704Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a sharpening pencil steadying device that prevents the lead storage tube of the sharpening pencil from swinging.

Conventionally, between the outer surface of a core storage tube housed in a metal barrel and the inner surface of the barrel, there is a diameter difference between the outer diameter of a lock cap that is fitted to the rear of the core storage tube and the outer diameter of the core storage tube. For sharpening pencils that have an arbitrary gap determined by the installation space of a clip that is partially hooked into a hole in the barrel, remove the cap and remove the eraser. When in use, there was a problem in that the core storage tube swung and became unstable, making it difficult to erase. In an attempt to solve this problem,
As disclosed in Japanese Utility Model Application Publication No. 56-130872, a structure is known in which an inner cylinder having ribs having a predetermined elastic force is press-fitted and fixed into a shaft cylinder. It is very difficult to set the fitting pressure due to component accuracy, environment, etc. For example, if the fitting pressure is low, the inner cylinder will move due to the reciprocating movement of the lead storage tube when the lead is fed out, and the mounting position will change. If the fitting pressure is too high, problems may occur such as making the core feeding unstable or making it difficult to press-fit the inner cylinder.
I couldn't say it was good enough.

Therefore, the present invention attempts to solve the above-mentioned problems by devising a method of fixing the inner cylinder that can prevent the core storage tube from swinging.

Hereinafter, the present invention will be described in detail based on embodiments shown in the accompanying drawings.

In FIGS. 1 and 2, a shaft cylinder 1 made of metal
Inside is a chuck 3 into which the chuck ring 2 is fitted.
A core storage tube 4 connected to the core storage tube 4 is biased rearward by an elastic member 5 such as a spring stretched between the inner stage 1a of the shaft tube 1 and the core storage tube 4. Reference numeral 6 denotes a tip body attached to the front part of the barrel 1 by a fixing means such as screwing. It is provided with a blocking part 9 that prevents. 1
0 is an eraser attached to the rear part of the lead storage tube 4, and 11 is a knock cap detachably fitted onto the lead storage tube 4 so as to cover the eraser 10. Reference numeral 12 denotes a gap between the core storage tube 4 and the shaft tube 1, and an inner tube 13 of arbitrary length made of resin or the like and placed in this gap 12 is slightly larger than the outer diameter of the core storage tube 4, and is designed to hold the core. It has an inner diameter that does not impede the reciprocating movement of the storage tube 4, and an outer diameter that is slightly smaller than the inner diameter of the shaft tube 1 so that it can be easily inserted into the shaft tube 1. The clip 14 attached to the arbitrarily shaped hole 1c provided in the rear part of the clip 1 is pressed against the hooking part 14a exposed inward of the shaft cylinder 1, and the front end 13a is connected to the inclined regulating part on the inner surface of the shaft cylinder 1. It is placed in pressure contact with 1b. When installing the inner cylinder 13 into the shaft cylinder 1, as shown in FIG. When the clip 14 is attached to the hole 1c of the shaft cylinder 1 after the inner cylinder 13 is inserted to the extent that 1b, and therefore, the inner cylinder 13 is fixed with the front end 13a and the rear end 13b being pressed and supported.

What is important about the present invention is that in fixing the inner cylinder 13 in the shaft cylinder 1, the hook part 14a of the clip 14 attached to the shaft cylinder 1 is utilized, and the structure of the clip 14 and It goes without saying that various attachment means other than the example shown in the drawings can be employed as long as they are provided with a hooking part 14a that projects inside the barrel 1. The regulating portion 1b may also be replaced by, for example, an inclined stepped portion or a protrusion other than the illustrated example, but the inner cylinder 13
Considering the fact that variations in the dimensional accuracy of the clip 14 and the mounting dimensional accuracy of the clip 14 can be further absorbed, and the ease of manufacturing the regulating part 1b of the shaft cylinder 1, it is considered that the shaft cylinder 1 is tilted sequentially in the forward direction of the shaft cylinder as shown in the embodiment. The regulating portion 1b is preferable.

As described above, when attaching the inner cylinder into the shaft cylinder, the present invention utilizes the latch part of the clip attached to the shaft cylinder that is exposed inside the shaft cylinder, and the rear end of the clip is attached to this latch part. Therefore, since the front ends are pressed and supported by the regulating parts on the inner surface of the shaft cylinder and are fixedly arranged, it goes without saying that the eraser is easier to use, and unlike conventional erasers, the inner cylinder moves during use and the lead does not come out. Problems such as instability or difficulty in attaching the inner cylinder do not occur, and the practical effect is enormous.

[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 inner cylinder, and FIG. 3 is a longitudinal sectional view showing the installed state. DESCRIPTION OF SYMBOLS 1... Shaft tube, 1b... Regulation part, 4... Core storage tube, 12... Gap, 13... Inner cylinder, 13a... Front end, 13b... Rear end, 14... Clip, 14a
...Latch part.

Claims (1)

[Scope of utility model registration request] In the case of a sharpening pencil comprising a lead storage tube that is movable back and forth within a barrel made of metal, the inner barrel is placed in the gap between the lead storage tube and the barrel, and the barrel has its front end tilted sequentially in the forward direction. A steadying device for a sharp pencil, characterized in that the rear end of the clip is attached to the barrel and is supported in pressure contact with a hooking portion of a clip that is attached to the barrel and is supported by a regulating portion on the inner surface.