JPH047996Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a knock-type pencil pencil.

[Problems with conventional technology]

With the Knock-type sharp pencil, when the Knock button fitted to the tail end of the lead-accommodating tube is pushed forward, the chuck moves forward while holding the lead core, and in the process, the lead core is released and only the chuck remains. By retreating, the tip of the lead core extends from the tip. Therefore, the knock button protrudes from the tail end of the barrel.

By the way, writing instruments are products with large design elements, and are designed into various shapes. A design in which the notch button protrudes beyond the tail end of the barrel is one design, but on the other hand, a notch with a simple design in which the notch button does not protrude beyond the tail end of the barrel, like in conventional pencils, is one design. If a formula sharpening pencil can be produced, it will be possible to create something completely new.

[Purpose of invention]

SUMMARY OF THE INVENTION Therefore, the object of the present invention is to provide a knock-type sharp pencil in which the knock button does not protrude beyond the tail end of the barrel, allowing for a new design.

[Structure of the idea]

The knock-type sharp pencil of the present invention is a knock-type sharp pencil in which a lead lead is fed out from the tip of the barrel by pressing and advancing a push-button fitted to the tail end of a lead-accommodating tube. It is characterized in that the outer surface is flush with the tail end of the barrel, and the opening at the tail end of the barrel is sized to allow a fingertip to enter.

Furthermore, when replenishing lead cores, conventionally the click button was removed from the lead core storage tube, but with the click type sharp pencil of the present invention, it is difficult to remove the click button. However, in addition to providing a lead core supply hole in the center of the button that allows only one lead core to pass through,
If the inner surface is tapered so that the lead core replenishment hole protrudes, it is possible to replenish the lead core without removing the button, and the lead core does not fall out from the lead core replenishment hole. .

〔Example〕

The present invention will be specifically described below based on embodiments shown in the drawings.

The barrel 1 has a hexagonal outer shape, but its diameter is considerably larger than that of a normal sharpening pencil, and the opening 11 at the tail end has a diameter of approximately 13 mm, allowing a fingertip to enter it a little. . A holding tube 2 is screwed onto the tip of the shaft tube 1, and a tip 3 is screwed onto the tip of the holding tube 2. A chuck 6 is fixed to the tip of a lead core housing tube 5 that accommodates the lead core 4, and a chuck ring 7 is fitted into the tapered portion of the tip of the chuck 6. A knock spring 8 is interposed between the inner flange portion 21 of the holding cylinder 2 and the tip of the lead core storage tube 5. Therefore, the lead core accommodation pipe 5 and the chuck 6
is urged backward, so the chuck ring 7 tightens the chuck 6 and bites the lead core 4. The button 9 attached to the tail end of the lead core housing tube 5 is fitted into the opening 11, and its outer surface is at the same level as the tail end of the shaft tube 1 and does not protrude. and,
A lead core supply hole 91 is bored in the center of the knock button 9, but this lead core supply hole 91 has a small diameter through which only one lead core 4 can pass. Furthermore, the inner surface of the notch button 9 is tapered so that the lead replenishing hole 91 protrudes, and when the sharp pencil is held in a position with the notch button 9 facing down, the notch button 9
The lead core 4 in contact with the inner surface of the lead core 4 moves to the periphery.

In the click-type mechanical pencil having the above structure, in order to draw out the lead lead 4 by the click operation, it is sufficient to press the click button 9 with a fingertip, as shown in FIG. At this time, since the opening 11 is large, the fingertip penetrates into the shaft cylinder 1 as much as necessary for the knock stroke, and the lead core housing tube 5 is advanced. Therefore, the chuck 6 moves forward while gripping the lead core 4, and the lead core 4 protrudes from the opening at the tip of the tip 3, but in this process, the chuck ring 7 comes into contact with the inner stage of the tip 3, and the chuck 6 The chuck 6 opens and releases the grip on the lead core 4. Next, when the knob operation is released, the chuck 6 moves back and the lead 4 can be gripped again to enable writing.

Lead cores 4 are replenished one by one through the lead replenishment holes 91, but since the sharp pencil of the present invention is designed with emphasis on design and is not function-oriented,
The amount of lead core 4 consumed is small, and there is no problem in replenishing it one by one. Further, since the inner surface of the knock button 9 is tapered, it can be said that there is no possibility that the lead core 4 will fall out into the lead core replenishment hole 91 even if the knob button 9 is placed downward.

[Effect of idea]

As explained above, the lock-type sharp pencil of the present invention is characterized in that the outer surface of the lock button is flush with the tail end of the barrel, and the opening at the tail end of the barrel is large enough to allow a fingertip to enter. Therefore, it is possible to create a new design in which the lock button does not protrude beyond the tail end of the barrel.

[Brief explanation of drawings]

1 and 2 show cross-sectional views of an embodiment of the present invention, respectively. DESCRIPTION OF SYMBOLS 1...Shaft tube, 11...Tail end opening, 2...Holding tube, 3...Tip, 4...Lead core, 5...Lead core storage tube, 6...Chuck, 7...Chuck ring, 9
...Notsuku button, 91...Lead core supply hole.

Claims (1)

[Scope of Claim for Utility Model Registration] 1. A knock-type sharp pencil in which a lead lead is drawn out from a tip at the tip of a barrel by pressing and advancing a hitch button fitted to the tail end of a lead-accommodating tube, wherein said hitch button A knock-type sharp pencil characterized in that the outer surface of the barrel is flush with the tail end of the barrel, and the opening at the tail end of the barrel is large enough to allow a fingertip to enter. 2. A request for registration of a utility model characterized in that a lead core supply hole through which only one lead core can pass is provided in the center of the knock button, and the inner surface thereof is tapered so that the lead core supply hole protrudes. Range 1
Notsuku type mechanical pencil as described in the section.