JPS6227430Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) This invention is a cap type that allows the lead to be automatically extended when the cap body is attached to the rear of the sharp pencil body during use, allowing immediate writing. This is about a mechanical pencil.

(Prior art and its problems) Conventional cap-type sharp pencils have practical effects such as protecting the tip and being convenient to carry, but when in use, the cap body is fixed to the rear of the sharp pencil body. After that, it is necessary to perform the knock operation again to unwind the lead for the first time, and there is still room for improvement in terms of operational complexity.

(Purpose of the invention) The purpose of the invention is to make the cap body into a sharp pencil body so that when the cap body is attached to the rear of the sharp pencil body during use, the lead can be automatically fed out. To provide a cap-type mechanical pencil that allows immediate writing.

(Summary of the invention) The present invention has a core detent member 2 disposed inside the tip, a shaft cylinder 1 having a through hole 4 on the outer surface, a lead gripping means 6 connected to the front part, and a knob cap 7 at the rear part.
The lead storage cylinder 5 fitted with the lead holding means 6 and the shaft cylinder 1 are arranged so as to be biased backward by the first elastic member 8.
and an outer flange 1 protruding from the through hole 4.
A sharpening pencil main body A in which an actuating member 9 having a shape of 1 is biased rearward by a second resilient member 12.
and a cap body B consisting of a cap barrel 13 in which a pressing body 15 is biased forward by a third resilient member 16 inwardly at the rear, and the first, second, third
The elastic forces of the elastic members 8, 12, and 16 are set such that the third elastic member 16<the first elastic member 8<the second elastic member 12, and the cap body B is fixed to the rear part of the sharp pencil body A. At this time, the pusher 15 is pushed rearward by the knock cap 7 of the sharp pencil main body A to make it protrude, and the outer flange 11 of the actuating member 9 is pushed by the front end surface of the cap barrel 13 to move it forward. Its gist is a cap-type sharpening pencil in which the lead gripping means 6 is closed and the lead L is gripped by advancing, and then the lead L is drawn out by being carried forward.
This corresponds to the above purpose.

(Example) Hereinafter, an example of the present invention will be described in detail based on the accompanying drawings.

In FIG. 1, A indicates the main body of the sharp pencil, and reference numeral 1 is a barrel made of resin, metal, etc., and the front part of the barrel 1 has a core made of rubber or the like inside. A tip member 3 having a detent member 2 is fixed by an appropriate means such as screwing or fitting, and a plurality of tip members (two in the figure) are attached to the outer surface in the longitudinal direction.
) through-holes 4 are bored. Reference number 5 is
It is a lead storage cylinder which has a lead gripping means 6 such as a three-piece chuck on the front part and a lock cap 7 fitted on the rear part, and the lead storage cylinder 5 is attached to the inner stage of the actuating member 9 which will be described later. The first elastic member 8, which is made of a coil spring or the like, is disposed between the first elastic member 8 and the first elastic member 9a, so that the first elastic member 8 is always biased rearward. Reference number 9
has a recessed portion on the front inner surface, and a tightening member 10 such as a ring for tightening the lead gripping means 6 is slidably arranged in the recessed portion, and is arranged so as to protrude outward into the through hole 4 of the shaft tube 1. The actuating member 9 has an outer shoulder portion 11 with an outer step portion 9b and a shaft tube 1.
A second resilient member 12 made of a coil spring or the like is disposed between the step portion 1a on the front inner surface of the holder and the step 1a on the front inner surface of the holder. Reference numeral 13 denotes a cap body, and reference numeral 13 is a cap barrel having a through hole 14 at the rear, and inside the rear of the cap barrel 13, a pressing body 15 is attached to the inner wall of the rear end of the cap barrel 13. The third resilient member 16, which is made of a coil spring, a magnet, etc., is provided between the body and the body, and is always biased forward.

In addition, the first, second, and third repellent members 8, 1 mentioned above
The repulsive forces of 2 and 16 are set such that third repellent member 16<first repellent member 8<second repellent member 12.

Next, the operation of the above embodiment will be explained with reference to FIGS. 2 and 3.

When the cap body B is fixed to the rear part of the sharp pencil body A, first, since the repulsive force of the third repellent member 16 is smaller than that of the first and second repellent members 8 and 12, the pressing body 15 is moved by the grip cap 7. It is pressed rearward, moves rearward against the repulsive force of the third repellent member 16, and protrudes from the through hole 14. Along with this operation, the outer flange 11 of the actuating member 9 is pressed forward by the front end surface of the cap tube 13. On the other hand, in response to the forward movement of the actuating member 9, the lead gripping means 6
Since it is not urged backward by the elastic member 8 and moves, the core L is tightened and gripped by the tightening member 10, which moves forward together with the actuating member 9 (see FIG. 2). When the cap body B continues to be attached to the rear of the sharp pencil A, the outer flange 11 of the actuating member 9 is further pressed forward by the front end surface of the cap barrel 13, so that the actuating member 9 moves the lead L. The lead gripping means 6, the lead storage member 5, and the lock cap 7 which are in the gripped state are moved forward against the elastic force of the second elastic member 12, and the lead L is moved a predetermined length of the end member 3. Pay out from the tip. Thereafter, the protrusion 17 provided on the front inner surface of the cap barrel 13 fits into the recess 18 provided on the surface of the shaft barrel 1, and the attachment of the cap body B is completed (see FIG. 3).

It should be noted that the present invention is not limited to the above-mentioned embodiment. For example, by integrally forming the tip member 3 and the barrel 1, or by slightly changing the design of the pressing body 14, the knob cap 7 can be attached to the barrel 1. Various configurations can be adopted, such as arranging it flush with the rear end or inwardly, or attaching an eraser to the pressing body 15.

(Effects of the invention) As described above, according to the invention, by fixing the cap body B to the rear part of the sharp pencil body A, the lead can be automatically drawn out to a predetermined length, making it possible to write immediately. can do. or,
Except when the cap body B is fixed to the rear part of the sharp pencil body A, the tightening member 10 disposed on the operating member 9 is positioned so as not to tighten the lead gripping means 6. It can be kept in an expanded state with the core open, which also prevents the core from breaking when carried.

In the present invention, various means for attaching the cap body and the sharp pencil body can be employed, and the length of the lead drawn out when fixing the cap body to the sharp pencil body also depends on the length of the cap barrel 13 and the sharp pencil body. By changing the fixing position with the shaft cylinder 1,
It can be changed to an appropriate length.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, with FIG. 1 being a longitudinal cross-sectional view, and FIGS. 2 and 3 being operation explanatory views. DESCRIPTION OF SYMBOLS 1... Shaft tube, 2... Core detent member, 4... Through hole, 5... Lead storage cylinder, 6... Lead gripping means, 7...
Knot cap, 8...first bullet repellent member, 9...operating member, 11...outer flange, 12...second bullet repellent member, 13...cap barrel, 15...pushing body, 16...th 3. Bullet repellent member.

Claims (1)

[Scope of utility model registration request] A core detent member 2 is disposed in the tip, and a core gripping means 6 is provided in the front part of the shaft cylinder 1 having a through hole 4 on the outer surface.
A lead storage cylinder 5 with a locking cap 7 fitted in the rear thereof is biased rearward by a first elastic member 8, and between the lead gripping means 6 and the shaft cylinder 1, A sharp pencil main body A in which an actuating member 9 having an outer flange 11 protruding from a through hole 4 is biased rearward by a second resilient member 12; The cap body B consists of a cap barrel 13 that is biased forward by a member 16, and the repulsive force of the first, second, and third repellent members 8, 12, and 16 is transferred to the third repellent member. 16<first elastic member 8<second elastic member 12, and when attaching the cap body B to the rear part of the sharp pencil body A, press the pressing body 15 backward with the notch cap 7 of the sharp pencil body A. At the same time, the front end surface of the cap barrel 13 presses the outer flange 11 of the actuating member 9 to move it forward, and as the actuating member 9 moves forward, the lead gripping means 6 is closed and the lead L is gripped and then taken. A cap-type sharp pencil that allows the lead L to be drawn out by moving it forward.