JPH0410077Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Field of Industrial Application) The present invention relates to a sharp pencil of the type that has an inner sleeve on the outer periphery of the collector chuck, and the inner sleeve serves as a spring holder for a spring for biasing the collector part. It is about improvement.

(Prior Art) As shown in FIG.
A has a collection chuck 3 into which a bushing 2 is fitted. The base of the collector portion 1 is integrally attached to the tip of the core tank 4. An inner sleeve 5 is fitted around the outer periphery of the collet portion 1. A spring 6 is fitted around the outer periphery of the collect part 1 within the middle sleeve 5, one end of which is brought into contact with the inner flange 7 of the middle sleeve 5, and the other end is brought into contact with the tip of the core tank 4, and the spring 6 is brought into contact with the inner flange 7 of the middle sleeve 5. When the head portion 1A is pushed out from the bushing 2 by the notch, it is biased to be pulled back. The core tank 4 and the inner sleeve 5 containing the collector chuck 3 are housed in a pipe-shaped body 8, and in this state, the inner sleeve 5 engages the locking protrusion 9 on the outer periphery of its base with the locking window 10 of the body 8. They are locked in the body 8 by being fitted together. A tip 12 for guiding the core 11 is attached to the tip of the body 8, and a hold rubber 13 for holding the core 11 is locked inside the tip 12. A pusher 14 is removably fitted to the base end of the core tank 4.
An eraser 15 is attached to the pusher 14.

This kind of sharpening pencil has a middle sleeve of 5
Since the spring 6 can be attached to the collector chuck 3 side in advance, there is an advantage that assembly is facilitated by simply inserting these into the body 8.

(Problem to be Solved by the Invention) However, in such a sharp pencil, it is necessary to make the locking window 10 slightly larger in order to facilitate the fitting of the locking protrusion 9. When writing with pressure applied to the pen, there was some wobbling, making it difficult to write.

An object of the present invention is to provide a sharpening pencil in which an inner sleeve can be built in without causing rattling.

(Means for solving the problem) The structure of the present invention to achieve the above purpose is as follows:
Referring to FIGS. 1 and 2, which correspond to embodiments, the present invention forms the proximal end of the inner sleeve 5 as a tapered recess 5A, and the tapered recess 5A is formed on the inner periphery of the body 8. The distal end portion 5B of the inner sleeve 5 is engaged with a stepped portion 12A formed on the inner periphery of the tip 12.

(Function) When formed in this way, when the chip 12 is pushed in and installed, the inner sleeve 5 is pushed in through the stepped portion 12A of the tip 12, and the tapered recess 5A at the base end of the inner sleeve 5 is shaped into the body according to the degree of pushing. 8
It is fitted into the tapered convex portion 8A of and held between the front and back,
Kadatsuki disappears.

(Example) An example of the present invention will be described below with reference to FIGS. 1 and 4. Note that portions corresponding to those in FIG. 5 described above are designated by the same reference numerals. In this embodiment, the base end portion of the middle sleeve 5 is formed as a tapered recess 5A, and correspondingly, a tapered convex portion 8A is formed on the inner periphery of the body 8. Chip 12
has a stepped portion 12A on its inner periphery, and the stepped portion 12A is adapted to abut against the distal end portion 5B of the inner sleeve 5.

In this way, the assembly on the core tank 4 side is inserted into the body 8 from its tip as shown in FIG. The distal end portion 5B of the middle sleeve 5 is pushed in through the stepped portion 12A of the 12, thereby deepening the fitted state between the tapered recess 5A and the tapered projection 8A, and the middle sleeve 5 becomes stepped with the fixed tapered projection 8A. It is held between the part 12A,
Rubbing will no longer occur.

In addition, in this embodiment, the pusher 14 fitted to the base end of the core tank 4 has a cylindrical locking portion 16 integrally molded on the body side edge of its circumferential surface, and a hook on the inner surface of the tip of the locking portion. The pusher 16a is engaged with a flange 8a formed on the outer periphery of the end of the body 8 and is prevented from coming off, thereby preventing the pusher 14 from falling off. Although the opening of the lead tank 4 is closed by this pusher 14, as shown in FIG. The core 11 may be inserted and removed by means of the following.

(Effect of the invention) As explained above, in the sharpening pencil according to the invention, the tapered recess at the base of the inner sleeve is fitted into and locked with the tapered protrusion inside the body, and the tip of the inner sleeve is connected to the step of the tip. Since the chip is engaged and locked, both ends are held together when the chip is assembled, and no wobbling occurs. Therefore, it does not wobble even when pressure is applied to the pen, eliminating obstacles when writing.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal sectional view showing an embodiment of the sharpening pencil according to the present invention, Fig. 2 is a longitudinal sectional view at a stage in the middle of its assembly, Fig. 3 is a partial enlarged sectional view of the main parts, and Fig. 4. is a cross-sectional view of another example of the pusher part,
FIG. 5 is a longitudinal sectional view of a conventional sharpening pencil. 1...Collection part, 2...Butsing, 3...
Collection chuck, 4... core tank, 5... middle sleeve, 5A... taper recess, 5B... tip,
6...Spring, 7...Inner Tsuba, 8...Body,
8A...Tapered recess, 11... Core, 12... Chip, 12A... Stepped portion.

Claims (1)

[Scope of utility model registration request] A collector chuck having a bushing fitted into a head portion at the tip of the collector portion, a core tank whose tip end is integrally attached to the base of the collector portion, and a core tank configured to be slidable relative to the outer periphery of the collector portion. an inner sleeve fitted into the inner sleeve; and an inner sleeve fitted around the outer periphery of the collector portion in the inner sleeve so as to pull the head portion of the collector portion back into the bushing when the head portion protrudes from the bushing. In the sharpening pencil, the sharpening pencil is provided with a body housing a spring that is biased, an inner sleeve containing the lead tank and the collect chuck, and a lead guide tip attached to the tip of the body, The proximal end portion is formed as a tapered recess, and the tapered recess is fitted into and locked with a tapered convex portion formed on the inner periphery of the body, and the distal end portion of the middle sleeve is formed on the inner periphery of the tip. A sharpening pencil characterized by being locked to a stepped part.