JPS6226232Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a centering prevention device that can reliably prevent accidental centering that may occur while carrying a tip-knot type sharpening pencil.

In tip-knock type sharp pencils, the lead is fed out by pressing the tip end surface of the core tube at the tip of the slider that protrudes from the tip of the barrel or the tip surface of the lead protruding from the core tube at the tip of the slider against a paper surface, etc. While carrying it in your pocket etc.
When the core tube at the tip of the slider comes into contact with or comes off the fabric of a pocket, etc., the slider moves back and forth, and as a result, the core may protrude inadvertently, increasing the risk of dirt or breakage of the core.

The present invention is an attempt to eliminate such centering, and its purpose is to provide a structure that automatically prevents centering when it is inserted into a pocket for carrying. The invention will be explained below with reference to embodiments shown in the drawings.

In FIG. 1, a pressing force transmitting member 4, which faces the rear end surface of the chuck body 3, is loosely fitted inside the core storage tube 2. The pressing force transmitting member 4 is made so lightweight that even when the chuck body 3 is pushed by its own weight, the chuck does not open.

Through holes 6 and 7 are formed in the portion of the barrel 1 that faces the clip holding portion 5 and the portion of the core storage tube 2 that faces the portion, respectively, and the core storage tube is formed on the inner surface of the barrel 1 at the six through holes. A fixture 8 having a size that fits in the gap between the two is fixed. The actuating member 10 energized by the bullet 9 is loaded by this fixture 8, and its head portion 10a is exposed from the through hole 6, while the cam surface portion 10c at the rear end is attached to the back of the pressing force transmitting member 4. The neck portion 10b is inserted into the through hole 7 so as to be able to come into contact with the end face, and the neck portion 10b connecting the head portion 10a and the cam surface portion 10c is inserted into the hole of the fixture 8. Through hole 7
shall be of a length that does not hinder the back and forth movement of the core storage tube 2 when the rear end is notched.

In the case of FIG. 1, even if the pressing force transmitting member 4 rotates, since the member 4 has a tubular shape, it can come into contact with the cam surface portion 10c at any rotational position. 4 rotates, the cam surface portion 10c
If the protrusion 11 does not come into contact with the core storage tube 2, as shown in FIG. The core storage tube 2 having the through hole 7 into which the cam surface portion 10c of the actuating member 10 is fitted is also provided with a protrusion 13 for preventing rotation, if necessary, and is slidably fitted into the guide groove 14 on the shaft cylinder 1 side. Match. In addition, if necessary, an elastic member 1 is provided between the core storage pipe 2 and the pressing force transmitting member 4.
5 may be provided.

As a preferred embodiment of the shape of the clip holding part 5 and the head part 10a of the operating member 10, as shown in FIG. The purpose is to bring out the In this way, the fabric A inserted into the pocket, etc., will be stretched by the amount of tension that is applied to the head portion 10a.
is strongly pressed down to increase the pressing force appearing on the cam surface portion 10c.

As shown in FIG. 2, when a cloth A such as a pocket is inserted into the clip holding part 5, the elastic force 9 is compressed and the actuating member 10 causes a downward movement. 4, thereby pressing the rear end surface of the chuck body 3, and pushing the chuck body 3 against the force of the chuck body elastic member 16.
Since the core is also moved forward, the chuck body 3 expands due to its own restoring elasticity, and the grip of the core by the chuck body 3 is released. On the other hand, if the sharp pencil inserted in the pocket or the like is removed, the state shown in FIG. 2 can be returned to the state shown in FIG.

As is clear from the above description, the present invention reduces the force applied to the operating member head portion 10a in a direction approximately perpendicular to the axis of the barrel 1 when the clip holding portion 5 is inserted into a pocket etc. for carrying. Then, the chuck body 3 is moved forward against the force of the chuck body elastic member 16 via the pressing force transmission member 4, and the chuck body 3 is automatically expanded to release the grip of the core, and the core is released from the slider. Since the slider 17 can be held only by the core guide member 18 of 17, there is no fear of centering no matter how much the slider 17 moves back and forth, and the core tube 1
Even if you insert the lead into your pocket with the lead sticking out from 9, the lead will slide through the 18 lead-carrying members and be retracted. In addition, just by pulling it out of your pocket, the core is held again, so there is no hassle when using it. Furthermore, since only the head portion 10a of the actuating member 10 is exposed to the outside at an inconspicuous location on the back side of the clip holding portion 5, it does not become a nuisance and does not interfere with the appearance at all.

[Brief explanation of drawings]

Figures 1 and 2 are cross-sectional views of the sharpening pencil equipped with the centering prevention device of the present invention before and after it is inserted into a pocket, and Figure 3 is a cross-sectional view taken along the - line in Figure 1 and viewed in the direction of the arrow. , FIG. 4 is a sectional view of an embodiment different from FIG. 1. DESCRIPTION OF SYMBOLS 1... Shaft cylinder, 2... Core storage tube, 3... Chuck body, 4... Pressing force transmission member, 5... Clip holding part, 10... Operating member.

Claims (1)

[Scope of utility model registration request] The rear end surface of the pressing force transmitting member 4 that is loosely fitted into the core storage tube 2 and facing the rear end surface of the chuck body 3 and the shaft tube 1
The head portion 10a is exposed at a distance between the clip holding portion 5 and the clip holding portion 5, and the head portion 10a is movable in a direction substantially perpendicular to the axis of the shaft tube 1, intersecting the shaft tube 1 and the core storage tube 2. The clip holding portion 5 can be brought into contact with the cam surface portion 10c of the operating member 10 attached to the clip holding portion 5.
Operating member head portion 10a when inserted into a pocket etc.
The chuck body 3 is moved forward against the force of the chuck body elastic member 16 via the pressing force transmission member 4 by a force applied in a direction substantially perpendicular to the axis of the shaft cylinder 1, and the chuck body A device for preventing centering when carrying a tip-knot type sharp pencil, which is characterized by releasing the gripping of the lead by 3.