JPH0315346Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Field of Industrial Application) The present invention relates to a sharpening pencil that does not require sharpening the tip of the lead core.

(Prior Art) Conventional sharpening pencils, especially those with a large lead diameter, have the trouble of having to sharpen the tip with a knife or the like when the tip becomes worn due to writing.

(Problem that the invention aims to solve) Therefore, the present invention is an extremely convenient sharp pencil that eliminates the need to sharpen the tip every time it wears out, and allows you to finish writing work in a short amount of time. The purpose is to provide the following.

(Means for Solving the Problems) In order to achieve the above-mentioned object, the present invention installs a core guide pipe in which an axial slit is provided in a part of the peripheral wall in the shaft cylinder. Load the required number of short lead cores sharpened in advance in tandem,
A slit is formed in the shaft cylinder on the outer periphery of the core guide pipe in the same way as the slit in the core guide pipe, and a locking step is provided at the front end of the slit. Insert the push pin part of the feeding body that has an elastic hook part at the front end that is bent so as to come into contact with the peripheral end of the rear end surface of the core body in a natural state, and connect it integrally with the push pin part. The operating button of the feeding body is exposed on the outside surface of the barrel through a slit in the barrel, and by advancing the operating button along the slit, the lead core is pushed by the hook portion at the front end of the pushing pin of the feeding body. When the operation button is moved forward and engaged with the locking stepped portion of the barrel slit, it is prevented from retreating due to the pen pressure of the lead core, and when the operation button is moved back, the hook portion at the front end of the push pin portion is elastically deformed. To provide a sharpening pencil which is configured to move backward, restore itself to the position of the next rear end surface of a lead core, and come into contact with the rear end surface of the lead core again.

(Example) An example of the illustrated embodiment of the present invention will be described in detail below. First, a core guide pipe 1 having an axial slit 1a formed in a part of the peripheral wall is installed in the shaft cylinder with its front end protruding from the front end of the shaft cylinder 2, and the base 3 is fitted to the outer periphery of the projection. The cap 3 is screwed onto the front end of the shaft tube 2. Inside the lead guide pipe 1, a required number of short lead cores 4, which have been sharpened in advance, are loaded in a vertical line. The core guide pipes 1 and 5 are assembled into a set and packed into a cartridge 5, and the cartridge 5 is directly loaded into the rear of the core guide pipe 1 in the shaft cylinder and sequentially dropped to be supplied. The core guide pipe 1 is attached to the shaft tube 2 on the outer periphery of the core guide pipe 1.
Slit 2 is placed in the same position as slit 1a.
A is formed at the front end of the slit 2a, and a locking step 2b facing forward is provided at the front end of the slit 2a. Inside the slit 1a of the core guide pipe 1, there is an elastic wire which is bent so as to come into contact with the peripheral end of the rear end surface of each lead core 4 in its natural state (maintaining its undeformed posture). A vertically elongated push pin portion 6b of the feeding body 6 having a hook portion 6a at the front end is inserted. A connecting piece 6 protrudes from the approximate center of the push pin portion 6b of the feeding body 6 and extends through the slit 2a of the barrel 2, and an operation button 6d exposed on the surface of the barrel 2 is attached to the tip of the connecting piece 6. ing. When the operation button 6d is advanced along the slit 2a of the barrel 2, the hook portion 6 at the front end of the push pin portion 6b of the feeding body 6
A presses the lead core 4... and the feeding operation is performed. Then, when the operation button 6d is moved to the front end position of the slit 2a and slightly rotated in the circumferential direction, the connecting piece 6c of the feeding body 6 engages with the locking step 2b of the slit 2a, thereby preventing the feeding body 6 from retreating. As a result, the lead core 4 whose rear end surface is abutted by the hook portion 6a is also prevented from retreating, thereby preventing it from sinking in due to pen pressure. When the tip of the lead core 4 is worn out and a good line cannot be obtained, when the operation button 6d is removed from the locking step 2b of the slit 2 and moved backward, the front end of the push pin portion 6b is removed. The hook part 6a is the base 3.
Under the constraints of the inner surface of the lead core body 4 and the outer surface of the lead core body 4, the operation button 6 moves back while elastically deforming in a straight line.
At the position where d abuts against the rear end wall 2c of the slit 2, it reaches the rear end surface of the next lead core, elastically restores itself, and comes into contact with the rear end surface of the lead core again (the state shown in FIG. 1). Therefore, when the operation button 6d is moved forward again, the sharp lead core is fed out, and the lead core with a worn tip falls from the tip opening of the cap 3.

(Function) With the above-described structure, the present invention has the above-mentioned structure, so that when the tip of the lead lead body is worn out during writing and a good writing line cannot be obtained, by retracting the operation button 6d, the push pin Since the hook portion 6a at the front end of the lead 6b automatically comes into contact with the rear end surface of the next sharp lead core, by moving the operation button 6d forward again, the lead core with the worn lead tip can be removed from the tip opening of the cap 3. It can be dropped to cause a new sharp lead core to protrude.

(Effects of the invention) With the above-described structure and operation, the present invention allows you to replace the tip of the lead core with a new sharpened lead just by moving the operation button when the tip of the lead core becomes worn out. This has the effect of eliminating the need for work such as sharpening the tip.

[Brief explanation of drawings]

The figures show one embodiment of the present invention, in which FIG. 1 is a longitudinal sectional view, FIG. 2 is an external view, and FIG. 3 is a longitudinal sectional view of a cartridge packed with a lead core. 1...Core guide pipe, 1a...Slit, 2
...Axis cylinder, 2a...Slit, 2b...Step for locking, 2c...Rear end wall of slit, 3...Bag, 4
... Lead core body, 5 ... Cartridge, 6 ... Feeding body, 6a ... Hook part, 6b ... Push pin part, 6c
...Connecting piece, 6d...Operation button.

Claims (1)

[Scope of utility model registration request] A core guide pipe with an axial slit provided in a part of the peripheral wall is installed in the shaft cylinder, and a required number of short lead cores, each of which has been sharpened in advance, is loaded in a column in the core guide pipe. A slit is formed in the shaft cylinder on the outer periphery of the core guide pipe in the same way as the slit in the core guide pipe, and a locking step is provided at the front end of the slit. Insert the push pin part of the feeding body that has an elastic hook part at the front end that is bent so as to come into contact with the peripheral end of the rear end surface of the core body in a natural state, and connect it integrally with the push pin part. The operating button of the feeding body is exposed on the outside surface of the barrel through a slit in the barrel, and by advancing the operating button along the slit, the lead core is pushed by the hook portion at the front end of the pushing pin of the feeding body. When the operation button is moved forward and engaged with the locking stepped portion of the barrel slit, it is prevented from retreating due to the pen pressure of the lead core, and when the operation button is moved back, the hook portion at the front end of the push pin portion is elastically deformed. The sharpening pencil is constructed such that it moves backward, returns to the position of the rear end surface of the next lead core, and comes into contact with the rear end surface of the lead core again.