JPS6132795Y2 - - 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.
The core tube at the tip of the slider may come into contact with or dislodge from the fabric of the pocket, etc., causing the slider to move back and forth, which may cause the core to protrude without you even realizing it, increasing the risk of dirt or core breakage. .

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 facing the rear end surface of the chuck body 3 is loosely fitted inside the core storage tube 2. It is made to be so lightweight that even if you press the button, it will not open the door.

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 a trochanter 8 is formed on the inner surface of the barrel 1 at the six through holes. A part of the trochanter 8 is exposed from the through hole 6 of the shaft tube 1, and another part of the trochanter 8 is exposed from the through hole 7 of the core storage tube 2. is inserted and fixed to the rear surface of the pressing force transmitting member 4 so as to be crimped. Of course, the mounting member 9 may not be used and the mounting member 9 may be rotatably mounted. The size of the through hole 7 and the mounting member 9 are determined by the size of the core storage tube 2 that is made when the rear end is notched.
It is determined in such a way that it does not interfere with the back and forth movement of the

The pressing force transmitting member 4 in FIG. 1 has a tubular shape, and even if the pressing force transmitting member 4 rotates, contact with the trochanter 8 is always guaranteed. In this case, as shown in FIG. 4, a protrusion 10 is formed on the pressing force transmission member 4, and the core storage tube
By slidably fitting into the guide groove 11 on the side, the pressing force transmitting member 4 is prevented from rotating relative to the core storage tube 2, and if necessary, a protrusion 12 is also formed on the core storage tube 2 to prevent the shaft from rotating. By slidably fitting into the guide groove 13 on the cylinder 1 side, rotation of the core storage pipe 2 with respect to the shaft cylinder 1 is prevented. Also, the core storage tube 2
An elastic member 14 for automatic return of the member 4 may be provided between the pressing force transmitting member 4 and the pressing force transmitting member 4.

A preferred embodiment of the clip holding portion 5 is to have an inverted concave cross-sectional shape, with a portion of the trochanter 8 exposed at the center thereof, as shown in FIG. In this way, the fabric A inserted into the pocket or the like is tensed, and the frictional force with the trochanter 8 is made stronger accordingly.

As is clear from the above explanation, the present invention rotates the trochanter 8 in the normal or reverse direction by friction with the fabric when inserting the clip holding part 5 into a pocket or the like, or vice versa. , thereby changing from the state shown in FIG. 1 to the state shown in FIG.
The chuck body 3 is moved forward or backward by moving the pressing force transmitting member 4 from the state shown in the figure to the state shown in FIG.
It is possible to release the clamping of the core and to clamp it again. In other words, while the lead is inserted into a pocket or the like and carried, the lead is only held by the lead-carrying member 16 of the slider 15, so even if the slider 15 moves back and forth, the lead will not be fed out.
Not only that, when the core is inserted into a pocket, etc., it will automatically retract when it is pushed by the fabric A, etc., without any special operation to retract the core. In addition, the core will be in a chucked state just by pulling it out of your pocket, so you can immediately perform the centering operation. Moreover, the trochanter 8 is a through hole 6 of the shaft tube 1 facing the clip holding part 5.
Since only a portion of it is exposed, it is completely unnoticeable in appearance and does not interfere with the design of the sharp pencil.

[Brief explanation of the drawing]

Figures 1 and 2 are cross-sectional views showing the lock-tip mechanical pencil equipped with the centering prevention device of the present invention before and after it is inserted into a pocket, and Figure 3 is an arrow along the - line in Figure 1. 4 is a sectional view of a different embodiment 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, 6, 7... Through hole, 8... Trochanter.

Claims (1)

[Scope of utility model registration request] A pressing force transmitting member 4 is loosely fitted into the core storage tube 2 facing the rear end surface of the chuck body 3, and the clip holding portion 5
The trochanter 8 is rotatably pivoted to the inner surface of the shaft cylinder 1 so that a part of the trochanter 8 is exposed from the through hole 6 of the shaft cylinder 1 facing the shaft, and the other part of the trochanter 8 is attached to the core. Through hole 7 of storage tube 2
The core is clamped by the chuck body 3 via the pressing force transmitting member 4 by the rotation of the trochanter 8 when inserting the clip holding portion 5 into a pocket or the like. A device for preventing centering when carrying a sharpener pencil with a notch at the tip, which is characterized by opening the center of the pencil.