JPS6132794Y2 - - 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 comes into contact with and comes off from the fabric of pockets, etc., causing the slider to move back and forth, causing the core to protrude before you know it, leading to the risk of breaking the core and preventing stains on the fabric, etc. due to the core. It may increase.

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 the tip-notch type sharp pencil shown in FIG. 1, 1 is a barrel, 2 is a lead storage tube, 3 is a chuck body, and 3a is a rear end surface of the chuck body 3, which is opposite to the rear end surface 3a of the chuck body 3. Core storage tube 2
A pressing force transmission member 4 for opening and closing the chuck is loosely fitted inside. The pressing force transmitting member 4 is made lightweight so that its own weight does not push the chuck open.
In the illustrated example, it is shown as a tubular shape, but it is not necessarily limited to this. 4a is a pressing force transmission member 4
The rear end surface 4a of the rear end surface also serves as a pressing force receiving surface of an operating arm piece 5, which will be described later.

The operating arm piece 5 has a distal end portion 5a exposed at a space 7 where the shaft cylinder 1 and the clip holding portion 6 face each other, and a rear end portion 5b thereof is exposed to the pressing force transmitting member 4 described above.
It is rotatably attached to intersect with the shaft tube 1 and the core storage tube 2 so as to be able to come into contact with the rear end surface 4a of the core. 1
Reference characters a and 2a are through holes formed in the shaft tube 1 and the core storage tube 2, into which the operating arm piece 5 is inserted. As shown in FIGS. 3 and 4, a convenient structure for rotatably attaching the operating arm piece 5 is a spring fitting 8 that is tightly held on the outer circumferential surface of the core storage tube 2 by a wound body 8a. Although the end portion 8b is inserted through the pivot hole of the operating arm piece 5, it may be fixed to the inner surface of the shaft cylinder 1 with a pin. Fourth
In the figure, as a preferred embodiment of the shape of the clip holding part 6 and the distal end portion 5a of the actuating arm piece 5, the cross-sectional shape of the clip holding part 6 is an inverted concave shape, and the distal end portion 5a of the actuating arm piece 5 is placed in the center. Make it manifest. In this way, the fabric A of the inserted pocket or the like is tensed and the pressing force and frictional motion applied from the fabric A to the front end portion 5a is strengthened, so that the pressing force appearing at the rear end portion 5b is made stronger. . In addition, in order for the actuating arm piece 5 to operate reliably every time, the actuating arm piece 5 must have a steadying protrusion that fits into the guide groove 2b bored in the core storage pipe 2, as shown in FIG. A portion 5c is formed on the rear end portion 5b, thereby stopping the left and right swinging and transmitting only the pressing force in the axial direction to the pressing force transmitting member 4.
It is preferable to apply this force to the rear end surface 4a and to enable correct swinging in the front-rear direction.

In addition, in the figure, 9 is a slider having a core tube 10,
11 is a core-carrying member installed in the slider 9;
Reference numeral 12 indicates an elastic member for the chuck body.

When a piece of fabric A such as a pocket is inserted into the clip holding portion 6 of the hook-type sharp pencil shown in FIG. 1, the state at that time is as shown in FIG. 2. That is, when the user pushes open the clip holder 6 and inserts it into his pocket, when he releases his finger from the clip holder 6, an eccentric pressing force is applied to the tip end portion 5a of the operating arm via the taut fabric A.
Furthermore, when the clip holding portion 6 is inserted into a pocket without being opened, a clockwise rotational force is generated due to the frictional motion applied to the operating arm tip portion 5a, and the rear end portion 5b engages the rear end surface 4a of the pressing force transmitting member 4. Since the chuck body 3 is pushed forward against the force of the chuck body elastic member 12, the chuck body 3 expands with its own restoring elasticity, and the grip of the core by the chuck body 3 is released. Become. On the other hand, if you pull out a sharpie pencil from your pocket, you can use the second one.
The state shown in the figure returns to the state shown in FIG. 1, and the chuck body 3 clamps the core.

As is clear from the above explanation, the present invention is a portable device, so when it is inserted into a pocket etc.
expands to release the grip on the lead, and the lead is only held by the lead-carrying member 11 of the slider 9.
No matter how much the slider 9 moves back and forth, there is no fear of centering. In addition to this, even if the core is inserted into a pocket with the core protruding from the core tube 10, the core will slide over the 11 core-carrying members and be automatically retracted by the expanded chuck body 3.
The structure using the actuating arm piece 5 doubles the force applied to the tip portion 5a based on the lever principle, and transmits the pressing force to the pressing force transmitting member 4.
Therefore, centering prevention can be reliably achieved regardless of whether the fabric A is a thin fabric such as a dress shirt or a thick fabric such as a suit. Furthermore, the fact that the lead can be held automatically again just by pulling it out of the pocket is extremely convenient, as there is no hassle when using it.

[Brief explanation of drawings]

Figures 1 and 2 are sectional views of the sharp pencil equipped with the centering prevention device of the present invention before and after insertion into the pocket, Figure 3 is a perspective view of the spring fitting, and Figure 4 is a perspective view of the spring fitting.
The figure is a sectional view taken along the - line in Figure 1 and viewed in the direction of the arrow. DESCRIPTION OF SYMBOLS 1...Axis tube, 2...Core storage pipe, 3...Chuck body, 4...Press force transmission member, 5...Operating arm piece, 6
...Clip holder.

Claims (1)

[Claims for Utility Model Registration] 1. The rear end surface 4 of the pressing force transmitting member 4 loosely fitted into the core storage tube 2, facing the rear end surface 3a of the chuck body 3.
a, and an actuating arm piece 5 whose distal end portion 5a is exposed at a space 7 where the shaft cylinder 1 and the clip holding part 6 face each other, and which is rotatably attached to intersect the shaft cylinder 1 and the core storage pipe 2. The rear end portion 5b can be brought into contact with the lead, and when the operating arm piece 5 is rotated when the clip holding part 6 is inserted into a pocket etc., the holding of the lead by the chuck body 3 is released via the pressing force transmission member 4. This is a device for preventing centering when carrying a sharpener pencil with a notch at the tip. 2 The operating arm piece 5 is rotatably attached to the outer peripheral surface of the lead storage tube 2 by a spring fitting 8 which is tightly held on the outer circumferential surface of the lead storage tube 2 by the winding body part 8a. Centering prevention device when carrying. 3. The clip holding portion 6 has an inverted concave shape, and the tip portion 5a of the actuating arm piece 5 is exposed at the center of the clip holding portion 6. Centering of the tip-knot type sharp pencil as set forth in claim 1 of the utility model registration when carried. Prevention device. 4 The operating arm piece 5 is a guide groove 2 bored in the core storage pipe 2.
The steady-stop protrusion 5c that fits into the rear end portion 5b
A device for preventing centering during carrying of a tip-knot type mechanical pencil according to claim 1, which is formed in a utility model.